CRYPTO
EMLIB

Detailed Description

Cryptography accelerator peripheral API.

For cryptographic support, users should consider the crypto APIs of the mbedTLS library provided by Silicon Labs instead of the interface provided in em_crypto.h . The mbedTLS library provides a much richer crypto API, including hardware acceleration of several functions.

The main purpose of em_crypto.h is to implement a thin software interface for the CRYPTO hardware functions especially for the accelerated APIs of the mbedTLS library. Additionally em_crypto.h implement the AES API of the em_aes.h (supported by classic EFM32) for backwards compatibility. The following list summarizes the em_crypto.h inteface:


AES

The AES APIs include support for AES-128 and AES-256 with block cipher modes:

  • CBC - Cipher Block Chaining mode
  • CFB - Cipher Feedback mode
  • CTR - Counter mode
  • ECB - Electronic Code Book mode
  • OFB - Output Feedback mode

For the AES APIs input/output data (plaintext, ciphertext, key, and so on) are treated as byte arrays, starting with most significant byte. In other words, 32 bytes of plaintext (B0...B31) is located in memory in the same order, with B0 at the lower address and B31 at the higher address.

Byte arrays must always be a multiple of AES block size, ie. a multiple of 16. Padding, if required, is done at the end of the byte array.

Byte arrays should be word (32 bit) aligned for performance considerations, since the array is accessed with 32 bit access type. The core MCUs supports unaligned accesses, but with a performance penalty.

It is possible to specify the same output buffer as input buffer as long as they point to the same address. In that case the provided input buffer is replaced with the encrypted/decrypted output. Notice that the buffers must be exactly overlapping. If partly overlapping, the behavior is undefined.

It is up to the user to use a cipher mode according to its requirements to avoid breaking security. See the specific cipher mode theory for details.

References:

  • Wikipedia - Cipher modes, en.wikipedia.org/wiki/Cipher_modes
  • Recommendation for Block Cipher Modes of Operation, NIST Special Publication 800-38A, 2001 Edition, csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
  • Recommendation for Block Cipher Modes of Operation, csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf


SHA

The SHA APIs include support for

The SHA-1 implementation is FIPS-180-1 compliant, ref:

  • Wikipedia - SHA-1, en.wikipedia.org/wiki/SHA-1
  • SHA-1 spec - www.itl.nist.gov/fipspubs/fip180-1.htm

The SHA-256 implementation is FIPS-180-2 compliant, ref:

  • Wikipedia - SHA-2, en.wikipedia.org/wiki/SHA-2
  • SHA-2 spec - csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf


CRYPTO_Mul

CRYPTO_Mul is a function for multiplying big integers that are bigger than the operand size of the MUL instruction, which is 128 bits. CRYPTO_Mul multiplies all partial operands of the input operands using MUL to form a resulting number which may be twice the size of the operands.

CRPYTO_Mul is typically used by RSA implementations, which perform a huge amount of multiplication and square operations to implement modular exponentiation. Some RSA implementations use a number representation including arrays of 32bit words of variable size. Compile with -D USE_VARIABLE_SIZED_DATA_LOADS in order to load these numbers directly into CRYPTO without converting the number representation.


Load and Execute Instruction Sequences

The functions for loading data and executing instruction sequences can be used to implement complex algorithms like elliptic curve cryptography (ECC)) and authenticated encryption algorithms. There are two typical modes of operation:

  • Multi-sequence operation
  • Single static instruction sequence operation

In multi-sequence mode the software starts by loading input data, an instruction sequence, execute, and finally read the result. This process is repeated until the full crypto operation is complete.

When using a single static instruction sequence, only one instruction sequence is loaded initially. The sequence can be set up to run multiple times. Data can be loaded during the execution of the sequence by using DMA, BUFC and/or programmed I/O directly from the MCU core. For details about how to program the instruction sequences, see the reference manual of the particular Silicon Labs device.

To load input data to the CRYPTO module, use any of the following functions:

In order to read output data from the CRYPTO module use any of the following functions:

To load an instruction sequence to the CRYPTO module, use CRYPTO_InstructionSequenceLoad .

To execute the current instruction sequence in the CRYPTO module, use CRYPTO_InstructionSequenceExecute .

To check whether an instruction sequence has completed, use CRYPTO_InstructionSequenceDone .

To wait for an instruction sequence to complete, use CRYPTO_InstructionSequenceWait .

To optimally load (with regards to speed) and execute an instruction sequence, use any of the CRYPTO_EXECUTE_X macros (where X is in the range 1-20) defined in em_crypto.h . E.g. CRYPTO_EXECUTE_19.

Macros

#define CRYPTO_INSTRUCTIONSEQUENSE_DEFAULT
#define CRYPTO_MAX_SEQUENCE_INSTRUCTIONS (20)

Typedefs

typedef void(* CRYPTO_AES_CtrFuncPtr_TypeDef ) (uint8_t *ctr)
AES counter modification function pointer.
typedef uint32_t CRYPTO_Data260_TypeDef [CRYPTO_DATA260_SIZE_IN_32BIT_WORDS]
typedef uint32_t CRYPTO_Data_TypeDef [CRYPTO_DATA_SIZE_IN_32BIT_WORDS]
typedef volatile uint32_t * CRYPTO_DataReg_TypeDef
typedef uint32_t CRYPTO_DData_TypeDef [CRYPTO_DDATA_SIZE_IN_32BIT_WORDS]
typedef volatile uint32_t * CRYPTO_DDataReg_TypeDef
typedef uint8_t CRYPTO_InstructionSequence_TypeDef [ CRYPTO_MAX_SEQUENCE_INSTRUCTIONS ]
typedef uint32_t CRYPTO_KeyBuf_TypeDef [CRYPTO_KEYBUF_SIZE_IN_32BIT_WORDS]
typedef uint32_t CRYPTO_QData_TypeDef [CRYPTO_QDATA_SIZE_IN_32BIT_WORDS]
typedef volatile uint32_t * CRYPTO_QDataReg_TypeDef
typedef uint8_t CRYPTO_SHA1_Digest_TypeDef [CRYPTO_SHA1_DIGEST_SIZE_IN_BYTES]
typedef uint8_t CRYPTO_SHA256_Digest_TypeDef [CRYPTO_SHA256_DIGEST_SIZE_IN_BYTES]

Enumerations

enum CRYPTO_IncWidth_TypeDef {
cryptoInc1byte = CRYPTO_CTRL_INCWIDTH_INCWIDTH1,
cryptoInc2byte = CRYPTO_CTRL_INCWIDTH_INCWIDTH2,
cryptoInc3byte = CRYPTO_CTRL_INCWIDTH_INCWIDTH3,
cryptoInc4byte = CRYPTO_CTRL_INCWIDTH_INCWIDTH4
}
enum CRYPTO_KeyWidth_TypeDef {
cryptoKey128Bits = 8,
cryptoKey256Bits = 16
}
enum CRYPTO_ModulusId_TypeDef {
cryptoModulusBin256 = CRYPTO_WAC_MODULUS_BIN256,
cryptoModulusBin128 = CRYPTO_WAC_MODULUS_BIN128,
cryptoModulusGcmBin128 = CRYPTO_WAC_MODULUS_GCMBIN128,
cryptoModulusEccB233 = CRYPTO_WAC_MODULUS_ECCBIN233P,
cryptoModulusEccB163 = CRYPTO_WAC_MODULUS_ECCBIN163P,
cryptoModulusEccP256 = CRYPTO_WAC_MODULUS_ECCPRIME256P,
cryptoModulusEccP224 = CRYPTO_WAC_MODULUS_ECCPRIME224P,
cryptoModulusEccP192 = CRYPTO_WAC_MODULUS_ECCPRIME192P,
cryptoModulusEccB233Order = CRYPTO_WAC_MODULUS_ECCBIN233N,
cryptoModulusEccB233KOrder = CRYPTO_WAC_MODULUS_ECCBIN233KN,
cryptoModulusEccB163Order = CRYPTO_WAC_MODULUS_ECCBIN163N,
cryptoModulusEccB163KOrder = CRYPTO_WAC_MODULUS_ECCBIN163KN,
cryptoModulusEccP256Order = CRYPTO_WAC_MODULUS_ECCPRIME256N,
cryptoModulusEccP224Order = CRYPTO_WAC_MODULUS_ECCPRIME224N,
cryptoModulusEccP192Order = CRYPTO_WAC_MODULUS_ECCPRIME192N
}
enum CRYPTO_MulOperandWidth_TypeDef {
cryptoMulOperand256Bits = CRYPTO_WAC_MULWIDTH_MUL256,
cryptoMulOperand128Bits = CRYPTO_WAC_MULWIDTH_MUL128,
cryptoMulOperandModulusBits = CRYPTO_WAC_MULWIDTH_MULMOD
}
enum CRYPTO_ResultWidth_TypeDef {
cryptoResult128Bits = CRYPTO_WAC_RESULTWIDTH_128BIT,
cryptoResult256Bits = CRYPTO_WAC_RESULTWIDTH_256BIT,
cryptoResult260Bits = CRYPTO_WAC_RESULTWIDTH_260BIT
}

Functions

__STATIC_INLINE void AES_CBC128 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Cipher-block chaining (CBC) cipher mode encryption/decryption, 128 bit key.
__STATIC_INLINE void AES_CBC256 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Cipher-block chaining (CBC) cipher mode encryption/decryption, 256 bit key.
__STATIC_INLINE void AES_CFB128 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Cipher feedback (CFB) cipher mode encryption/decryption, 128 bit key.
__STATIC_INLINE void AES_CFB256 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Cipher feedback (CFB) cipher mode encryption/decryption, 256 bit key.
__STATIC_INLINE void AES_CTR128 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, uint8_t *ctr, CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc)
AES Counter (CTR) cipher mode encryption/decryption, 128 bit key.
__STATIC_INLINE void AES_CTR256 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, uint8_t *ctr, CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc)
AES Counter (CTR) cipher mode encryption/decryption, 256 bit key.
__STATIC_INLINE void AES_CTRUpdate32Bit (uint8_t *ctr)
Update last 32 bits of 128 bit counter, by incrementing with 1.
__STATIC_INLINE void AES_DecryptKey128 (uint8_t *out, const uint8_t *in)
Generate 128 bit AES decryption key from 128 bit encryption key. The decryption key is used for some cipher modes when decrypting.
__STATIC_INLINE void AES_DecryptKey256 (uint8_t *out, const uint8_t *in)
Generate 256 bit AES decryption key from 256 bit encryption key. The decryption key is used for some cipher modes when decrypting.
__STATIC_INLINE void AES_ECB128 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, bool encrypt)
AES Electronic Codebook (ECB) cipher mode encryption/decryption, 128 bit key.
__STATIC_INLINE void AES_ECB256 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, bool encrypt)
AES Electronic Codebook (ECB) cipher mode encryption/decryption, 256 bit key.
__STATIC_INLINE void AES_OFB128 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv)
AES Output feedback (OFB) cipher mode encryption/decryption, 128 bit key.
__STATIC_INLINE void AES_OFB256 (uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv)
AES Output feedback (OFB) cipher mode encryption/decryption, 256 bit key.
void CRYPTO_AES_CBC128 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Cipher-block chaining (CBC) cipher mode encryption/decryption, 128 bit key.
void CRYPTO_AES_CBC256 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Cipher-block chaining (CBC) cipher mode encryption/decryption, 256 bit key.
static void CRYPTO_AES_CBCx (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt, CRYPTO_KeyWidth_TypeDef keyWidth)
Cipher-block chaining (CBC) cipher mode encryption/decryption, 128/256 bit key.
void CRYPTO_AES_CFB128 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Cipher feedback (CFB) cipher mode encryption/decryption, 128 bit key.
void CRYPTO_AES_CFB256 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Cipher feedback (CFB) cipher mode encryption/decryption, 256 bit key.
static void CRYPTO_AES_CFBx (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt, CRYPTO_KeyWidth_TypeDef keyWidth)
Cipher feedback (CFB) cipher mode encryption/decryption, 128/256 bit key.
void CRYPTO_AES_CTR128 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, uint8_t *ctr, CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc)
AES Counter (CTR) cipher mode encryption/decryption, 128 bit key.
void CRYPTO_AES_CTR256 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, uint8_t *ctr, CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc)
AES Counter (CTR) cipher mode encryption/decryption, 256 bit key.
void CRYPTO_AES_CTRUpdate32Bit (uint8_t *ctr)
Update the last 32 bits of 128 bit counter by incrementing with 1.
static void CRYPTO_AES_CTRx (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, uint8_t *ctr, CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc, CRYPTO_KeyWidth_TypeDef keyWidth)
Counter (CTR) cipher mode encryption/decryption, 128/256 bit key.
void CRYPTO_AES_DecryptKey128 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in)
Generate 128 bit AES decryption key from 128 bit encryption key. The decryption key is used for some cipher modes when decrypting.
void CRYPTO_AES_DecryptKey256 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in)
Generate 256 bit AES decryption key from 256 bit encryption key. The decryption key is used for some cipher modes when decrypting.
void CRYPTO_AES_ECB128 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, bool encrypt)
AES Electronic Codebook (ECB) cipher mode encryption/decryption, 128 bit key.
void CRYPTO_AES_ECB256 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, bool encrypt)
AES Electronic Codebook (ECB) cipher mode encryption/decryption, 256 bit key.
static void CRYPTO_AES_ECBx (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, bool encrypt, CRYPTO_KeyWidth_TypeDef keyWidth)
Electronic Codebook (ECB) cipher mode encryption/decryption, 128/256 bit key.
void CRYPTO_AES_OFB128 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv)
AES Output feedback (OFB) cipher mode encryption/decryption, 128 bit key.
void CRYPTO_AES_OFB256 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv)
AES Output feedback (OFB) cipher mode encryption/decryption, 256 bit key.
static void CRYPTO_AES_OFBx (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, CRYPTO_KeyWidth_TypeDef keyWidth)
Output feedback (OFB) cipher mode encryption/decryption, 128/256 bit key.
void CRYPTO_AES_PCBC128 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Propagating Cipher-block chaining (PCBC) cipher mode encryption/decryption, 128 bit key.
void CRYPTO_AES_PCBC256 (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt)
AES Propagating Cipher-block chaining (PCBC) cipher mode encryption/decryption, 256 bit key.
static void CRYPTO_AES_PCBCx (CRYPTO_TypeDef *crypto, uint8_t *out, const uint8_t *in, unsigned int len, const uint8_t *key, const uint8_t *iv, bool encrypt, CRYPTO_KeyWidth_TypeDef keyWidth)
Propagating cipher-block chaining (PCBC) cipher mode encryption/decryption, 128/256 bit key.
__STATIC_INLINE void CRYPTO_AES_ProcessLoop (CRYPTO_TypeDef *crypto, unsigned int len, CRYPTO_DataReg_TypeDef inReg, const uint8_t *in, CRYPTO_DataReg_TypeDef outReg, uint8_t *out)
Perform generic AES loop.
__STATIC_INLINE void CRYPTO_BurstFromCrypto (volatile uint32_t *reg, uint32_t *val)
Read a 128 bit value from a crypto register.
__STATIC_INLINE void CRYPTO_BurstToCrypto (volatile uint32_t *reg, const uint32_t *val)
Write a 128 bit value into a crypto register.
__STATIC_INLINE bool CRYPTO_CarryIsSet (CRYPTO_TypeDef *crypto)
Quick read access of the carry bit from arithmetic operations.
__STATIC_INLINE void CRYPTO_DataRead ( CRYPTO_DataReg_TypeDef dataReg, CRYPTO_Data_TypeDef val)
Read 128 bits of data from a DATAX register in the CRYPTO module.
__STATIC_INLINE void CRYPTO_DataReadUnaligned (volatile uint32_t *reg, uint8_t *val)
Read 128 bits of data from a DATAX register in the CRYPTO module.
__STATIC_INLINE void CRYPTO_DataWrite ( CRYPTO_DataReg_TypeDef dataReg, const CRYPTO_Data_TypeDef val)
Write 128 bits of data to a DATAX register in the CRYPTO module.
__STATIC_INLINE void CRYPTO_DataWriteUnaligned (volatile uint32_t *reg, const uint8_t *val)
Write 128 bits of data to a DATAX register in the CRYPTO module.
__STATIC_INLINE uint8_t CRYPTO_DData0_4LSBitsRead (CRYPTO_TypeDef *crypto)
Quick read access of the 4 LSbits of the DDATA0 register.
__STATIC_INLINE void CRYPTO_DData0Read260 (CRYPTO_TypeDef *crypto, CRYPTO_Data260_TypeDef val)
Read 260 bits from the DDATA0 register.
__STATIC_INLINE void CRYPTO_DData0Write260 (CRYPTO_TypeDef *crypto, const CRYPTO_Data260_TypeDef val)
Write 260 bits to the DDATA0 register.
__STATIC_INLINE bool CRYPTO_DData1_MSBitRead (CRYPTO_TypeDef *crypto)
Quick read the MSbit of the DDATA1 register.
__STATIC_INLINE void CRYPTO_DDataRead ( CRYPTO_DDataReg_TypeDef ddataReg, CRYPTO_DData_TypeDef val)
Read 256 bits of data from a DDATAX register in the CRYPTO module.
__STATIC_INLINE void CRYPTO_DDataWrite ( CRYPTO_DDataReg_TypeDef ddataReg, const CRYPTO_DData_TypeDef val)
Write 256 bits of data to a DDATAX register in the CRYPTO module.
__STATIC_INLINE void CRYPTO_IncWidthSet (CRYPTO_TypeDef *crypto, CRYPTO_IncWidth_TypeDef incWidth)
Set the width of the DATA1 increment instruction DATA1INC.
__STATIC_INLINE bool CRYPTO_InstructionSequenceDone (CRYPTO_TypeDef *crypto)
Check whether the execution of an instruction sequence has completed.
__STATIC_INLINE void CRYPTO_InstructionSequenceExecute (CRYPTO_TypeDef *crypto)
Execute the current programmed instruction sequence.
__STATIC_INLINE void CRYPTO_InstructionSequenceLoad (CRYPTO_TypeDef *crypto, const CRYPTO_InstructionSequence_TypeDef instructionSequence)
Load a sequence of instructions to be executed on the current values in the data registers.
__STATIC_INLINE void CRYPTO_InstructionSequenceWait (CRYPTO_TypeDef *crypto)
Wait for completion of the current sequence of instructions.
__STATIC_INLINE void CRYPTO_InstructionWait (CRYPTO_TypeDef *crypto)
Wait for completion of the current command.
__STATIC_INLINE void CRYPTO_IntClear (CRYPTO_TypeDef *crypto, uint32_t flags)
Clear one or more pending CRYPTO interrupts.
__STATIC_INLINE void CRYPTO_IntDisable (CRYPTO_TypeDef *crypto, uint32_t flags)
Disable one or more CRYPTO interrupts.
__STATIC_INLINE void CRYPTO_IntEnable (CRYPTO_TypeDef *crypto, uint32_t flags)
Enable one or more CRYPTO interrupts.
__STATIC_INLINE uint32_t CRYPTO_IntGet (CRYPTO_TypeDef *crypto)
Get pending CRYPTO interrupt flags.
__STATIC_INLINE uint32_t CRYPTO_IntGetEnabled (CRYPTO_TypeDef *crypto)
Get enabled and pending CRYPTO interrupt flags. Useful for handling more interrupt sources in the same interrupt handler.
__STATIC_INLINE void CRYPTO_IntSet (CRYPTO_TypeDef *crypto, uint32_t flags)
Set one or more pending CRYPTO interrupts from software.
__STATIC_INLINE void CRYPTO_KeyBuf128Write (CRYPTO_TypeDef *crypto, const uint32_t *val)
Quick write 128 bit key to the CRYPTO module.
__STATIC_INLINE void CRYPTO_KeyBufWrite (CRYPTO_TypeDef *crypto, CRYPTO_KeyBuf_TypeDef val, CRYPTO_KeyWidth_TypeDef keyWidth)
Set the key value to be used by the CRYPTO module.
__STATIC_INLINE void CRYPTO_KeyBufWriteUnaligned (CRYPTO_TypeDef *crypto, const uint8_t *val, CRYPTO_KeyWidth_TypeDef keyWidth)
Set the key value to be used by the CRYPTO module.
void CRYPTO_KeyRead (CRYPTO_TypeDef *crypto, CRYPTO_KeyBuf_TypeDef val, CRYPTO_KeyWidth_TypeDef keyWidth)
Read the key value currently used by the CRYPTO module.
void CRYPTO_ModulusSet (CRYPTO_TypeDef *crypto, CRYPTO_ModulusId_TypeDef modType)
Set the modulus type used for wide arithmetic operations.
void CRYPTO_Mul (CRYPTO_TypeDef *crypto, uint32_t *A, int aSize, uint32_t *B, int bSize, uint32_t *R, int rSize)
Multiply two big integers.
__STATIC_INLINE void CRYPTO_MulOperandWidthSet (CRYPTO_TypeDef *crypto, CRYPTO_MulOperandWidth_TypeDef mulOperandWidth)
Set the number of bits in the operands of the MUL instruction.
__STATIC_INLINE void CRYPTO_QDataRead ( CRYPTO_QDataReg_TypeDef qdataReg, CRYPTO_QData_TypeDef val)
Read 512 bits of data from a QDATAX register in the CRYPTO module.
__STATIC_INLINE void CRYPTO_QDataWrite ( CRYPTO_QDataReg_TypeDef qdataReg, const CRYPTO_QData_TypeDef val)
Write 512 bits of data to a QDATAX register in the CRYPTO module.
__STATIC_INLINE void CRYPTO_ResultWidthSet (CRYPTO_TypeDef *crypto, CRYPTO_ResultWidth_TypeDef resultWidth)
Set the width of the results of the non-modulus instructions.
void CRYPTO_SHA_1 (CRYPTO_TypeDef *crypto, const uint8_t *msg, uint64_t msgLen, CRYPTO_SHA1_Digest_TypeDef msgDigest)
Perform a SHA-1 hash operation on a message.
void CRYPTO_SHA_256 (CRYPTO_TypeDef *crypto, const uint8_t *msg, uint64_t msgLen, CRYPTO_SHA256_Digest_TypeDef msgDigest)
Perform a SHA-256 hash operation on a message.
__STATIC_INLINE void cryptoBigintIncrement (uint32_t *words32bits, unsigned num32bitWords)
Increment value of 32bit word array by one.
__STATIC_INLINE void cryptoBigintZeroize (uint32_t *words32bits, unsigned num32bitWords)
Set the 32 bit word array to zero.

Macro Definition Documentation

#define CRYPTO_INSTRUCTIONSEQUENSE_DEFAULT
Value:
{ CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, \
CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, \
CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, \
CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, \
CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, \
CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END, \
CRYPTO_CMD_INSTR_END, CRYPTO_CMD_INSTR_END }

Default instruction sequence consisting of all ENDs. The user can initialize the instruction sequence with this default value set and fill in the desired operations from step 1. The first END instruction marks the end of the sequence.

Definition at line 554 of file em_crypto.h .

#define CRYPTO_MAX_SEQUENCE_INSTRUCTIONS   (20)

The maximum number of crypto instructions in an instruction sequence.

Definition at line 539 of file em_crypto.h .

Typedef Documentation

typedef void(* CRYPTO_AES_CtrFuncPtr_TypeDef) (uint8_t *ctr)

AES counter modification function pointer.

Note
This is defined for backwards compatibility with EFM32 em_aes.h . The CRYPTO implementation of counter mode does not support counter update callbacks.
Parameters
[in] ctr A counter value to be modified.

Definition at line 580 of file em_crypto.h .

typedef uint32_t CRYPTO_Data260_TypeDef[CRYPTO_DATA260_SIZE_IN_32BIT_WORDS]

CRYPTO data type used for data load functions. This data type is capable of storing a 260 bits value as used by the CRYPTO_DData0Write260 function.

Note that this data type is multiple of 32 bit words, so the actual storage used by this type is 32x9=288 bits.

Definition at line 458 of file em_crypto.h .

typedef uint32_t CRYPTO_Data_TypeDef[CRYPTO_DATA_SIZE_IN_32BIT_WORDS]

CRYPTO data types used for data load functions. This data type is capable of storing a 128 bits value as used in the crypto DATA registers.

Definition at line 430 of file em_crypto.h .

typedef volatile uint32_t* CRYPTO_DataReg_TypeDef

CRYPTO 128 bit Data register pointer type. The 128 bit registers are used to load 128 bit values as input and output data for cryptographic and big integer arithmetic functions of the CRYPTO module.

Definition at line 471 of file em_crypto.h .

typedef uint32_t CRYPTO_DData_TypeDef[CRYPTO_DDATA_SIZE_IN_32BIT_WORDS]

CRYPTO data type used for data load functions. This data type is capable of storing a 256 bits value as used in the crypto DDATA registers.

Definition at line 437 of file em_crypto.h .

typedef volatile uint32_t* CRYPTO_DDataReg_TypeDef

CRYPTO 256 bit DData (Double Data) register pointer type. The 256 bit registers are used to load 256 bit values as input and output data for cryptographic and big integer arithmetic functions of the CRYPTO module.

Definition at line 478 of file em_crypto.h .

typedef uint8_t CRYPTO_InstructionSequence_TypeDef[ CRYPTO_MAX_SEQUENCE_INSTRUCTIONS ]

Instruction sequence type. Fill in the desired operations from step1, step2, and so on. The CRYPTO_CMD_INSTR_END marks the end of the sequence. Bit fields are used to format the memory layout of the struct equal to the sequence registers in the CRYPTO module.

Definition at line 548 of file em_crypto.h .

typedef uint32_t CRYPTO_KeyBuf_TypeDef[CRYPTO_KEYBUF_SIZE_IN_32BIT_WORDS]

CRYPTO data type used for data load functions. This data type is capable of storing 256 bits as used in the crypto KEYBUF register.

Definition at line 464 of file em_crypto.h .

typedef uint32_t CRYPTO_QData_TypeDef[CRYPTO_QDATA_SIZE_IN_32BIT_WORDS]

CRYPTO data type used for data load functions. This data type is capable of storing a 512 bits value as used in the crypto QDATA registers.

Definition at line 448 of file em_crypto.h .

typedef volatile uint32_t* CRYPTO_QDataReg_TypeDef

CRYPTO 512 bit QData (Quad data) register pointer type. The 512 bit registers are used to load 512 bit values as input and output data for cryptographic and big integer arithmetic functions of the CRYPTO module.

Definition at line 485 of file em_crypto.h .

typedef uint8_t CRYPTO_SHA1_Digest_TypeDef[CRYPTO_SHA1_DIGEST_SIZE_IN_BYTES]

SHA-1 Digest type.

Definition at line 564 of file em_crypto.h .

typedef uint8_t CRYPTO_SHA256_Digest_TypeDef[CRYPTO_SHA256_DIGEST_SIZE_IN_BYTES]

SHA-256 Digest type.

Definition at line 567 of file em_crypto.h .

Enumeration Type Documentation

enum CRYPTO_IncWidth_TypeDef

CRYPTO result widths for MUL operations.

Enumerator
cryptoInc1byte

inc width is 1 byte

cryptoInc2byte

inc width is 2 byte

cryptoInc3byte

inc width is 3 byte

cryptoInc4byte

inc width is 4 byte

Definition at line 523 of file em_crypto.h .

enum CRYPTO_KeyWidth_TypeDef

CRYPTO key width.

Enumerator
cryptoKey128Bits

Key width is 128 bits

cryptoKey256Bits

Key width is 256 bits

Definition at line 531 of file em_crypto.h .

enum CRYPTO_ModulusId_TypeDef

CRYPTO modulus identifiers.

Enumerator
cryptoModulusBin256

Generic 256 bit modulus 2^256

cryptoModulusBin128

Generic 128 bit modulus 2^128

cryptoModulusGcmBin128

GCM 128 bit modulus = 2^128 + 2^7 + 2^2 + 2 + 1

cryptoModulusEccB233

ECC B233 prime modulus = 2^233 + 2^74 + 1

cryptoModulusEccB163

ECC B163 prime modulus = 2^163 + 2^7 + 2^6 + 2^3 + 1

cryptoModulusEccP256

ECC P256 prime modulus = 2^256 - 2^224 + 2^192 + 2^96 - 1

cryptoModulusEccP224

ECC P224 prime modulus = 2^224 - 2^96 - 1

cryptoModulusEccP192

ECC P192 prime modulus = 2^192 - 2^64 - 1

cryptoModulusEccB233Order

ECC B233 order modulus

cryptoModulusEccB233KOrder

ECC B233K order modulus

cryptoModulusEccB163Order

ECC B163 order modulus

cryptoModulusEccB163KOrder

ECC B163K order modulus

cryptoModulusEccP256Order

ECC P256 order modulus

cryptoModulusEccP224Order

ECC P224 order modulus

cryptoModulusEccP192Order

ECC P192 order modulus

Definition at line 488 of file em_crypto.h .

enum CRYPTO_MulOperandWidth_TypeDef

CRYPTO multiplication widths for wide arithmetic operations.

Enumerator
cryptoMulOperand256Bits

256 bits operands

cryptoMulOperand128Bits

128 bits operands

cryptoMulOperandModulusBits

MUL operand width is specified by the modulus type.

Definition at line 507 of file em_crypto.h .

enum CRYPTO_ResultWidth_TypeDef

CRYPTO result widths for MUL operations.

Enumerator
cryptoResult128Bits

Multiplication result width is 128 bits

cryptoResult256Bits

Multiplication result width is 256 bits

cryptoResult260Bits

Multiplication result width is 260 bits

Definition at line 516 of file em_crypto.h .

Function Documentation

__STATIC_INLINE void AES_CBC128 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Cipher-block chaining (CBC) cipher mode encryption/decryption, 128 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_CBC128 instead.

Definition at line 1353 of file em_crypto.h .

References CRYPTO_AES_CBC128() .

__STATIC_INLINE void AES_CBC256 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Cipher-block chaining (CBC) cipher mode encryption/decryption, 256 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_CBC256 instead.

Definition at line 1372 of file em_crypto.h .

References CRYPTO_AES_CBC256() .

__STATIC_INLINE void AES_CFB128 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Cipher feedback (CFB) cipher mode encryption/decryption, 128 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_CFB128 instead.

Definition at line 1390 of file em_crypto.h .

References CRYPTO_AES_CFB128() .

__STATIC_INLINE void AES_CFB256 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Cipher feedback (CFB) cipher mode encryption/decryption, 256 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_CFB256 instead.

Definition at line 1408 of file em_crypto.h .

References CRYPTO_AES_CFB256() .

__STATIC_INLINE void AES_CTR128 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
uint8_t * ctr,
CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc
)

AES Counter (CTR) cipher mode encryption/decryption, 128 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_CTR128 instead.

Definition at line 1426 of file em_crypto.h .

References CRYPTO_AES_CTR128() .

__STATIC_INLINE void AES_CTR256 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
uint8_t * ctr,
CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc
)

AES Counter (CTR) cipher mode encryption/decryption, 256 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_CTR256 instead.

Definition at line 1444 of file em_crypto.h .

References CRYPTO_AES_CTR256() .

__STATIC_INLINE void AES_CTRUpdate32Bit ( uint8_t * ctr )

Update last 32 bits of 128 bit counter, by incrementing with 1.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_CTRUpdate32Bit instead.

Definition at line 1462 of file em_crypto.h .

References CRYPTO_AES_CTRUpdate32Bit() .

__STATIC_INLINE void AES_DecryptKey128 ( uint8_t * out,
const uint8_t * in
)

Generate 128 bit AES decryption key from 128 bit encryption key. The decryption key is used for some cipher modes when decrypting.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_DecryptKey128 instead.

Definition at line 1476 of file em_crypto.h .

References CRYPTO_AES_DecryptKey128() .

__STATIC_INLINE void AES_DecryptKey256 ( uint8_t * out,
const uint8_t * in
)

Generate 256 bit AES decryption key from 256 bit encryption key. The decryption key is used for some cipher modes when decrypting.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_DecryptKey256 instead.

Definition at line 1490 of file em_crypto.h .

References CRYPTO_AES_DecryptKey256() .

__STATIC_INLINE void AES_ECB128 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
bool encrypt
)

AES Electronic Codebook (ECB) cipher mode encryption/decryption, 128 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_ECB128 instead.

Definition at line 1504 of file em_crypto.h .

References CRYPTO_AES_ECB128() .

__STATIC_INLINE void AES_ECB256 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
bool encrypt
)

AES Electronic Codebook (ECB) cipher mode encryption/decryption, 256 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_ECB256 instead.

Definition at line 1522 of file em_crypto.h .

References CRYPTO_AES_ECB256() .

__STATIC_INLINE void AES_OFB128 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv
)

AES Output feedback (OFB) cipher mode encryption/decryption, 128 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_OFB128 instead.

Definition at line 1539 of file em_crypto.h .

References CRYPTO_AES_OFB128() .

__STATIC_INLINE void AES_OFB256 ( uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv
)

AES Output feedback (OFB) cipher mode encryption/decryption, 256 bit key.

Deprecated:
This function preserves backwards compatibility. Use CRYPTO_AES_OFB256 instead.

Definition at line 1556 of file em_crypto.h .

References CRYPTO_AES_OFB256() .

void CRYPTO_AES_CBC128 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Cipher-block chaining (CBC) cipher mode encryption/decryption, 128 bit key.

Encryption: 

*           Plaintext                  Plaintext
*               |                          |
*               V                          V
* InitVector ->XOR        +-------------->XOR
*               |         |                |
*               V         |                V
*       +--------------+  |        +--------------+
* Key ->| Block cipher |  |  Key ->| Block cipher |
*       |  encryption  |  |        |  encryption  |
*       +--------------+  |        +--------------+
*               |---------+                |
*               V                          V
*           Ciphertext                 Ciphertext
*

Decryption: 

*         Ciphertext                 Ciphertext
*              |----------+                |
*              V          |                V
*       +--------------+  |        +--------------+
* Key ->| Block cipher |  |  Key ->| Block cipher |
*       |  decryption  |  |        |  decryption  |
*       +--------------+  |        +--------------+
*               |         |                |
*               V         |                V
* InitVector ->XOR        +-------------->XOR
*               |                          |
*               V                          V
*           Plaintext                  Plaintext
*

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key When encrypting, this is the 128 bit encryption key. When decrypting, this is the 128 bit decryption key. The decryption key may be generated from the encryption key with CRYPTO_AES_DecryptKey128() . If this argument is null, the key will not be loaded, as it is assumed the key has been loaded into KEYHA previously.
[in] iv 128 bit initialization vector to use.
[in] encrypt Set to true to encrypt, false to decrypt.

Definition at line 844 of file em_crypto.c .

References CRYPTO_AES_CBCx() , and cryptoKey128Bits .

Referenced by AES_CBC128() .

void CRYPTO_AES_CBC256 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Cipher-block chaining (CBC) cipher mode encryption/decryption, 256 bit key.

See CRYPTO_AES_CBC128() for the CBC figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key When encrypting, this is the 256 bit encryption key. When decrypting, this is the 256 bit decryption key. The decryption key may be generated from the encryption key with CRYPTO_AES_DecryptKey256() .
[in] iv 128 bit initialization vector to use.
[in] encrypt Set to true to encrypt, false to decrypt.

Definition at line 890 of file em_crypto.c .

References CRYPTO_AES_CBCx() , and cryptoKey256Bits .

Referenced by AES_CBC256() .

static void CRYPTO_AES_CBCx ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt,
CRYPTO_KeyWidth_TypeDef keyWidth
)
static

Cipher-block chaining (CBC) cipher mode encryption/decryption, 128/256 bit key.

See CRYPTO_AES_CBC128() for CBC figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key When encrypting, this is the 256 bit encryption key. When decrypting, this is the 256 bit decryption key. The decryption key may be generated from the encryption key with CRYPTO_AES_DecryptKey256() .
[in] iv 128 bit initialization vector to use.
[in] encrypt Set to true to encrypt, false to decrypt.
[in] keyWidth Set to cryptoKey128Bits or cryptoKey256Bits.

Definition at line 1698 of file em_crypto.c .

References CRYPTO_AES_ProcessLoop() , CRYPTO_DataWriteUnaligned() , and CRYPTO_KeyBufWriteUnaligned() .

Referenced by CRYPTO_AES_CBC128() , and CRYPTO_AES_CBC256() .

void CRYPTO_AES_CFB128 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Cipher feedback (CFB) cipher mode encryption/decryption, 128 bit key.

Encryption: 

*           InitVector    +----------------+
*               |         |                |
*               V         |                V
*       +--------------+  |        +--------------+
* Key ->| Block cipher |  |  Key ->| Block cipher |
*       |  encryption  |  |        |  encryption  |
*       +--------------+  |        +--------------+
*               |         |                |
*               V         |                V
*  Plaintext ->XOR        |   Plaintext ->XOR
*               |---------+                |
*               V                          V
*           Ciphertext                 Ciphertext
*

Decryption: 

*          InitVector     +----------------+
*               |         |                |
*               V         |                V
*       +--------------+  |        +--------------+
* Key ->| Block cipher |  |  Key ->| Block cipher |
*       |  encryption  |  |        |  encryption  |
*       +--------------+  |        +--------------+
*               |         |                |
*               V         |                V
*              XOR<- Ciphertext           XOR<- Ciphertext
*               |                          |
*               V                          V
*           Plaintext                  Plaintext
*

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key 128 bit encryption key is used for both encryption and decryption modes.
[in] iv 128 bit initialization vector to use.
[in] encrypt Set to true to encrypt, false to decrypt.

Definition at line 1086 of file em_crypto.c .

References CRYPTO_AES_CFBx() , and cryptoKey128Bits .

Referenced by AES_CFB128() .

void CRYPTO_AES_CFB256 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Cipher feedback (CFB) cipher mode encryption/decryption, 256 bit key.

See CRYPTO_AES_CFB128() for the CFB figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key 256 bit encryption key is used for both encryption and decryption modes.
[in] iv 128 bit initialization vector to use.
[in] encrypt Set to true to encrypt, false to decrypt.

Definition at line 1129 of file em_crypto.c .

References CRYPTO_AES_CFBx() , and cryptoKey256Bits .

Referenced by AES_CFB256() .

static void CRYPTO_AES_CFBx ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt,
CRYPTO_KeyWidth_TypeDef keyWidth
)
static

Cipher feedback (CFB) cipher mode encryption/decryption, 128/256 bit key.

See CRYPTO_AES_CFB128() for CFB figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key 256 bit encryption key is used for both encryption and decryption modes.
[in] iv 128 bit initialization vector to use.
[in] encrypt Set to true to encrypt, false to decrypt.
[in] keyWidth Set to cryptoKey128Bits or cryptoKey256Bits.

Definition at line 1843 of file em_crypto.c .

References CRYPTO_AES_ProcessLoop() , CRYPTO_DataWriteUnaligned() , and CRYPTO_KeyBufWriteUnaligned() .

Referenced by CRYPTO_AES_CFB128() , and CRYPTO_AES_CFB256() .

void CRYPTO_AES_CTR128 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
uint8_t * ctr,
CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc
)

AES Counter (CTR) cipher mode encryption/decryption, 128 bit key.

Encryption: 

*           Counter                    Counter
*              |                          |
*              V                          V
*       +--------------+           +--------------+
* Key ->| Block cipher |     Key ->| Block cipher |
*       |  encryption  |           |  encryption  |
*       +--------------+           +--------------+
*              |                          |
* Plaintext ->XOR            Plaintext ->XOR
*              |                          |
*              V                          V
*         Ciphertext                 Ciphertext
*

Decryption: 

*           Counter                    Counter
*              |                          |
*              V                          V
*       +--------------+           +--------------+
* Key ->| Block cipher |     Key ->| Block cipher |
*       |  encryption  |           |  encryption  |
*       +--------------+           +--------------+
*               |                          |
* Ciphertext ->XOR           Ciphertext ->XOR
*               |                          |
*               V                          V
*           Plaintext                  Plaintext
*

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key 128 bit encryption key. If this argument is null, the key will not be loaded, as it is assumed the key has been loaded into KEYHA previously.
[in,out] ctr 128 bit initial counter value. The counter is updated after each AES block encoding through use of ctrFunc .
[in] ctrFunc A function used to update the counter value. Not supported by CRYPTO. This parameter is included for backwards compatibility with the EFM32 em_aes.h API.

Definition at line 1205 of file em_crypto.c .

References CRYPTO_AES_CTRx() , and cryptoKey128Bits .

Referenced by AES_CTR128() .

void CRYPTO_AES_CTR256 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
uint8_t * ctr,
CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc
)

AES Counter (CTR) cipher mode encryption/decryption, 256 bit key.

See CRYPTO_AES_CTR128() for CTR figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key 256 bit encryption key.
[in,out] ctr 128 bit initial counter value. The counter is updated after each AES block encoding through use of ctrFunc .
[in] ctrFunc A function used to update counter value. Not supported by CRYPTO. This parameter is included in order for backwards compatibility with the EFM32 em_aes.h API.

Definition at line 1251 of file em_crypto.c .

References CRYPTO_AES_CTRx() , and cryptoKey256Bits .

Referenced by AES_CTR256() .

void CRYPTO_AES_CTRUpdate32Bit ( uint8_t * ctr )

Update the last 32 bits of 128 bit counter by incrementing with 1.

Notice that no special consideration is given to the possible wrap around. If 32 least significant bits are 0xFFFFFFFF, they will be updated to 0x00000000, ignoring overflow.

See general comments on layout and byte ordering of parameters.

Parameters
[in,out] ctr A buffer holding 128 bit counter to be updated.

Definition at line 1277 of file em_crypto.c .

Referenced by AES_CTRUpdate32Bit() .

static void CRYPTO_AES_CTRx ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
uint8_t * ctr,
CRYPTO_AES_CtrFuncPtr_TypeDef ctrFunc,
CRYPTO_KeyWidth_TypeDef keyWidth
)
static

Counter (CTR) cipher mode encryption/decryption, 128/256 bit key.

See CRYPTO_AES_CTR128() for CTR figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key 256 bit encryption key.
[in,out] ctr 128 bit initial counter value. The counter is updated after each AES block encoding through use of ctrFunc .
[in] ctrFunc A function used to update counter value. Not supported by CRYPTO. This parameter is included for backwards compatibility with the EFM32 em_aes.h API.
[in] keyWidth Set to cryptoKey128Bits or cryptoKey256Bits.

Definition at line 1921 of file em_crypto.c .

References CRYPTO_AES_ProcessLoop() , CRYPTO_DataReadUnaligned() , CRYPTO_DataWriteUnaligned() , and CRYPTO_KeyBufWriteUnaligned() .

Referenced by CRYPTO_AES_CTR128() , and CRYPTO_AES_CTR256() .

void CRYPTO_AES_DecryptKey128 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in
)

Generate 128 bit AES decryption key from 128 bit encryption key. The decryption key is used for some cipher modes when decrypting.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place 128 bit decryption key. Must be at least 16 bytes long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding 128 bit encryption key. Must be at least 16 bytes long.

Definition at line 1302 of file em_crypto.c .

References CRYPTO_DataReadUnaligned() , CRYPTO_DataWriteUnaligned() , and CRYPTO_InstructionSequenceWait() .

Referenced by AES_DecryptKey128() .

void CRYPTO_AES_DecryptKey256 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in
)

Generate 256 bit AES decryption key from 256 bit encryption key. The decryption key is used for some cipher modes when decrypting.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place 256 bit decryption key. Must be at least 32 bytes long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding 256 bit encryption key. Must be at least 32 bytes long.

Definition at line 1340 of file em_crypto.c .

References CRYPTO_DataReadUnaligned() , CRYPTO_DataWriteUnaligned() , and CRYPTO_InstructionSequenceWait() .

Referenced by AES_DecryptKey256() .

void CRYPTO_AES_ECB128 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
bool encrypt
)

AES Electronic Codebook (ECB) cipher mode encryption/decryption, 128 bit key.

Encryption: 

*          Plaintext                  Plaintext
*              |                          |
*              V                          V
*       +--------------+           +--------------+
* Key ->| Block cipher |     Key ->| Block cipher |
*       |  encryption  |           |  encryption  |
*       +--------------+           +--------------+
*              |                          |
*              V                          V
*         Ciphertext                 Ciphertext
*

Decryption: 

*         Ciphertext                 Ciphertext
*              |                          |
*              V                          V
*       +--------------+           +--------------+
* Key ->| Block cipher |     Key ->| Block cipher |
*       |  decryption  |           |  decryption  |
*       +--------------+           +--------------+
*              |                          |
*              V                          V
*          Plaintext                  Plaintext
*

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key When encrypting, this is the 128 bit encryption key. When decrypting, this is the 128 bit decryption key. The decryption key may be generated from the encryption key with CRYPTO_AES_DecryptKey128() .
[in] encrypt Set to true to encrypt, false to decrypt.

Definition at line 1417 of file em_crypto.c .

References CRYPTO_AES_ECBx() , and cryptoKey128Bits .

Referenced by AES_ECB128() .

void CRYPTO_AES_ECB256 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
bool encrypt
)

AES Electronic Codebook (ECB) cipher mode encryption/decryption, 256 bit key.

See CRYPTO_AES_ECB128() for ECB figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key When encrypting, this is the 256 bit encryption key. When decrypting, this is the 256 bit decryption key. The decryption key may be generated from the encryption key with CRYPTO_AES_DecryptKey256() .
[in] encrypt Set to true to encrypt, false to decrypt.

Definition at line 1459 of file em_crypto.c .

References CRYPTO_AES_ECBx() , and cryptoKey256Bits .

Referenced by AES_ECB256() .

static void CRYPTO_AES_ECBx ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
bool encrypt,
CRYPTO_KeyWidth_TypeDef keyWidth
)
static

Electronic Codebook (ECB) cipher mode encryption/decryption, 128/256 bit key.

See CRYPTO_AES_ECB128() for ECB figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key When encrypting, this is the 256 bit encryption key. When decrypting, this is the 256 bit decryption key. The decryption key may be generated from the encryption key with CRYPTO_AES_DecryptKey256() .
[in] encrypt Set to true to encrypt, false to decrypt.
[in] keyWidth Set to cryptoKey128Bits or cryptoKey256Bits.

Definition at line 1988 of file em_crypto.c .

References CRYPTO_AES_ProcessLoop() , and CRYPTO_KeyBufWriteUnaligned() .

Referenced by CRYPTO_AES_ECB128() , and CRYPTO_AES_ECB256() .

void CRYPTO_AES_OFB128 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv
)

AES Output feedback (OFB) cipher mode encryption/decryption, 128 bit key.

Encryption: 

*          InitVector    +----------------+
*              |         |                |
*              V         |                V
*       +--------------+ |        +--------------+
* Key ->| Block cipher | |  Key ->| Block cipher |
*       |  encryption  | |        |  encryption  |
*       +--------------+ |        +--------------+
*              |         |                |
*              |---------+                |
*              V                          V
* Plaintext ->XOR            Plaintext ->XOR
*              |                          |
*              V                          V
*         Ciphertext                 Ciphertext
*

Decryption: 

*          InitVector    +----------------+
*              |         |                |
*              V         |                V
*       +--------------+ |        +--------------+
* Key ->| Block cipher | |  Key ->| Block cipher |
*       |  encryption  | |        |  encryption  |
*       +--------------+ |        +--------------+
*              |         |                |
*              |---------+                |
*              V                          V
* Ciphertext ->XOR           Ciphertext ->XOR
*              |                          |
*              V                          V
*          Plaintext                  Plaintext
*

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key 128 bit encryption key.
[in] iv 128 bit initialization vector to use.

Definition at line 1530 of file em_crypto.c .

References CRYPTO_AES_OFBx() , and cryptoKey128Bits .

Referenced by AES_OFB128() .

void CRYPTO_AES_OFB256 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv
)

AES Output feedback (OFB) cipher mode encryption/decryption, 256 bit key.

See CRYPTO_AES_OFB128() for OFB figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key 256 bit encryption key.
[in] iv 128 bit initialization vector to use.

Definition at line 1569 of file em_crypto.c .

References CRYPTO_AES_OFBx() , and cryptoKey256Bits .

Referenced by AES_OFB256() .

static void CRYPTO_AES_OFBx ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
CRYPTO_KeyWidth_TypeDef keyWidth
)
static

Output feedback (OFB) cipher mode encryption/decryption, 128/256 bit key.

See CRYPTO_AES_OFB128() for OFB figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key 256 bit encryption key.
[in] iv 128 bit initialization vector to use.
[in] keyWidth Set to cryptoKey128Bits or cryptoKey256Bits.

Definition at line 2048 of file em_crypto.c .

References CRYPTO_AES_ProcessLoop() , CRYPTO_DataWriteUnaligned() , and CRYPTO_KeyBufWriteUnaligned() .

Referenced by CRYPTO_AES_OFB128() , and CRYPTO_AES_OFB256() .

void CRYPTO_AES_PCBC128 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Propagating Cipher-block chaining (PCBC) cipher mode encryption/decryption, 128 bit key.

Encryption: 

*           Plaintext                  Plaintext
*               |--------------+           |
*               V              V           V
* InitVector ->XOR        +-->XOR-------->XOR
*               |         |                |
*               V         |                V
*       +--------------+  |        +--------------+
* Key ->| Block cipher |  |  Key ->| Block cipher |
*       |  encryption  |  |        |  encryption  |
*       +--------------+  |        +--------------+
*               |---------+                |
*               V                          V
*           Ciphertext                 Ciphertext
*

Decryption: 

*         Ciphertext                 Ciphertext
*              |----------+                |
*              V          |                V
*       +--------------+  |        +--------------+
* Key ->| Block cipher |  |  Key ->| Block cipher |
*       |  decryption  |  |        |  decryption  |
*       +--------------+  |        +--------------+
*               |         |               |
*               V         V               V
* InitVector ->XOR  +--->XOR------------>XOR
*               |---+                     |
*               V                         V
*           Plaintext                  Plaintext
*

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key When encrypting, this is the 128 bit encryption key. When decrypting, this is the 128 bit decryption key. The decryption key may be generated from the encryption key with CRYPTO_AES_DecryptKey128() . If this argument is null, the key will not be loaded, as it is assumed the key has been loaded into KEYHA previously.
[in] iv 128 bit initialization vector to use.
[in] encrypt Set to true to encrypt, false to decrypt.

Definition at line 967 of file em_crypto.c .

References CRYPTO_AES_PCBCx() , and cryptoKey128Bits .

void CRYPTO_AES_PCBC256 ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt
)

AES Propagating Cipher-block chaining (PCBC) cipher mode encryption/decryption, 256 bit key.

See CRYPTO_AES_PCBC128() for the PCBC figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key When encrypting, this is the 256 bit encryption key. When decrypting, this is the 256 bit decryption key. The decryption key may be generated from the encryption key with CRYPTO_AES_DecryptKey256() .
[in] iv 128 bit initialization vector to use.
[in] encrypt Set to true to encrypt, false to decrypt.

Definition at line 1013 of file em_crypto.c .

References CRYPTO_AES_PCBCx() , and cryptoKey256Bits .

static void CRYPTO_AES_PCBCx ( CRYPTO_TypeDef * crypto,
uint8_t * out,
const uint8_t * in,
unsigned int len,
const uint8_t * key,
const uint8_t * iv,
bool encrypt,
CRYPTO_KeyWidth_TypeDef keyWidth
)
static

Propagating cipher-block chaining (PCBC) cipher mode encryption/decryption, 128/256 bit key.

See CRYPTO_AES_PCBC128() for PCBC figure.

See general comments on layout and byte ordering of parameters.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] key When encrypting, this is the 256 bit encryption key. When decrypting, this is the 256 bit decryption key. The decryption key may be generated from the encryption key with CRYPTO_AES_DecryptKey256() .
[in] iv 128 bit initialization vector to use.
[in] encrypt Set to true to encrypt, false to decrypt.
[in] keyWidth Set to cryptoKey128Bits or cryptoKey256Bits.

Definition at line 1771 of file em_crypto.c .

References CRYPTO_AES_ProcessLoop() , CRYPTO_DataWriteUnaligned() , and CRYPTO_KeyBufWriteUnaligned() .

Referenced by CRYPTO_AES_PCBC128() , and CRYPTO_AES_PCBC256() .

__STATIC_INLINE void CRYPTO_AES_ProcessLoop ( CRYPTO_TypeDef * crypto,
unsigned int len,
CRYPTO_DataReg_TypeDef inReg,
const uint8_t * in,
CRYPTO_DataReg_TypeDef outReg,
uint8_t * out
)

Perform generic AES loop.

Function loads given register with provided input data. Triggers CRYPTO to perform sequence of instructions and read specified output register to output buffer.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] len A number of bytes to encrypt/decrypt. Must be a multiple of 16.
[in] inReg An input register - one of DATA0,DATA1,DATA2,DATA3
[in] in A buffer holding data to encrypt/decrypt. Must be at least len long.
[in] outReg An output register - one of DATA0,DATA1,DATA2,DATA3
[out] out A buffer to place encrypted/decrypted data. Must be at least len long. It may be set equal to in , in which case the input buffer is overwritten.

Definition at line 2105 of file em_crypto.c .

References CRYPTO_DataRead() , CRYPTO_DataReadUnaligned() , CRYPTO_DataWrite() , CRYPTO_DataWriteUnaligned() , CRYPTO_InstructionSequenceExecute() , and CRYPTO_InstructionSequenceWait() .

Referenced by CRYPTO_AES_CBCx() , CRYPTO_AES_CFBx() , CRYPTO_AES_CTRx() , CRYPTO_AES_ECBx() , CRYPTO_AES_OFBx() , and CRYPTO_AES_PCBCx() .

__STATIC_INLINE void CRYPTO_BurstFromCrypto ( volatile uint32_t * reg,
uint32_t * val
)

Read a 128 bit value from a crypto register.

Note
This function provides a low-level API for reading one of the multi-word registers in the crypto peripheral. Applications should use CRYPTO_DataRead , CRYPTO_DDataRead or CRYPTO_QDataRead for reading the value of DATA, DDATA, and QDATA registers.
Parameters
[in] reg A pointer to the crypto register.
[out] val This is a pointer to an array that is capable of holding 4 32 bit integers that will be filled with the 128 bit value from the crypto register.

Definition at line 716 of file em_crypto.h .

Referenced by CRYPTO_DataRead() , CRYPTO_DDataRead() , CRYPTO_KeyRead() , and CRYPTO_QDataRead() .

__STATIC_INLINE void CRYPTO_BurstToCrypto ( volatile uint32_t * reg,
const uint32_t * val
)

Write a 128 bit value into a crypto register.

Note
This function provides a low-level API for writing to the multi-word registers in the crypto peripheral. Applications should use CRYPTO_DataWrite , CRYPTO_DDataWrite or CRYPTO_QDataWrite for writing to DATA, DDATA, and QDATA registers.
Parameters
[in] reg A pointer to the crypto register.
[in] val This is a pointer to 4 32 bit integers that contains the 128 bit value which will be written to the crypto register.

Definition at line 684 of file em_crypto.h .

Referenced by CRYPTO_DataWrite() , CRYPTO_DDataWrite() , CRYPTO_KeyBuf128Write() , CRYPTO_KeyBufWrite() , and CRYPTO_QDataWrite() .

__STATIC_INLINE bool CRYPTO_CarryIsSet ( CRYPTO_TypeDef * crypto )

Quick read access of the carry bit from arithmetic operations.

This function reads the carry bit of the CRYPTO ALU.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
Returns
Returns 'true' if carry is 1, and 'false' if carry is 0.

Definition at line 914 of file em_crypto.h .

Referenced by CRYPTO_Mul() .

__STATIC_INLINE void CRYPTO_DataRead ( CRYPTO_DataReg_TypeDef dataReg,
CRYPTO_Data_TypeDef val
)

Read 128 bits of data from a DATAX register in the CRYPTO module.

Read 128 bits of data from a DATAX register in the crypto module. The data value is typically output from a big integer operation (see crypto instructions)

Parameters
[in] dataReg The 128 bit DATA register.
[out] val Location where to store the value in memory.

Definition at line 760 of file em_crypto.h .

References CRYPTO_BurstFromCrypto() .

Referenced by CRYPTO_AES_ProcessLoop() , CRYPTO_DataReadUnaligned() , and CRYPTO_Mul() .

__STATIC_INLINE void CRYPTO_DataReadUnaligned ( volatile uint32_t * reg,
uint8_t * val
)

Read 128 bits of data from a DATAX register in the CRYPTO module.

Parameters
[in] dataReg The 128 bit DATA register.
[out] val Location where to store the value in memory.

Definition at line 1591 of file em_crypto.c .

References CRYPTO_DataRead() .

Referenced by CRYPTO_AES_CTRx() , CRYPTO_AES_DecryptKey128() , CRYPTO_AES_DecryptKey256() , and CRYPTO_AES_ProcessLoop() .

__STATIC_INLINE void CRYPTO_DataWrite ( CRYPTO_DataReg_TypeDef dataReg,
const CRYPTO_Data_TypeDef val
)

Write 128 bits of data to a DATAX register in the CRYPTO module.

Write 128 bits of data to a DATAX register in the crypto module. The data value is typically input to a big integer operation (see crypto instructions).

Parameters
[in] dataReg The 128 bit DATA register.
[in] val Value of the data to write to the DATA register.

Definition at line 742 of file em_crypto.h .

References CRYPTO_BurstToCrypto() .

Referenced by CRYPTO_AES_ProcessLoop() , CRYPTO_DataWriteUnaligned() , and CRYPTO_Mul() .

__STATIC_INLINE void CRYPTO_DataWriteUnaligned ( volatile uint32_t * reg,
const uint8_t * val
)

Write 128 bits of data to a DATAX register in the CRYPTO module.

Parameters
[in] dataReg The 128 bit DATA register.
[in] val Pointer to value to write to the DATA register.

Definition at line 1612 of file em_crypto.c .

References CRYPTO_DataWrite() .

Referenced by CRYPTO_AES_CBCx() , CRYPTO_AES_CFBx() , CRYPTO_AES_CTRx() , CRYPTO_AES_DecryptKey128() , CRYPTO_AES_DecryptKey256() , CRYPTO_AES_OFBx() , CRYPTO_AES_PCBCx() , and CRYPTO_AES_ProcessLoop() .

__STATIC_INLINE uint8_t CRYPTO_DData0_4LSBitsRead ( CRYPTO_TypeDef * crypto )

Quick read access of the 4 LSbits of the DDATA0 register.

This function quickly retrieves the 4 least significant bits of the DDATA0 register via the DDATA0LSBS bit field in the DSTATUS register.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
Returns
Returns the 4 LSbits of DDATA0.

Definition at line 934 of file em_crypto.h .

__STATIC_INLINE void CRYPTO_DData0Read260 ( CRYPTO_TypeDef * crypto,
CRYPTO_Data260_TypeDef val
)

Read 260 bits from the DDATA0 register.

This functions reads 260 bits from the DDATA0 register in the CRYPTO module. The data value is typically output from a big integer operation (see crypto instructions) when the result width is set to 260 bits by calling CRYPTO_ResultWidthSet(cryptoResult260Bits);

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[out] val A location to store the value in memory.

Definition at line 956 of file em_crypto.h .

References CRYPTO_DDataRead() .

__STATIC_INLINE void CRYPTO_DData0Write260 ( CRYPTO_TypeDef * crypto,
const CRYPTO_Data260_TypeDef val
)

Write 260 bits to the DDATA0 register.

This functions writes 260 bits to the DDATA0 register in the CRYPTO module. The data value is typically input to a big integer operation (see crypto instructions) when the result width is set to 260 bits by calling CRYPTO_ResultWidthSet(cryptoResult260Bits);

Parameters
[in] crypto Pointer to CRYPTO peripheral register block.
[out] val Location where of the value in memory.

Definition at line 980 of file em_crypto.h .

References CRYPTO_DDataWrite() .

__STATIC_INLINE bool CRYPTO_DData1_MSBitRead ( CRYPTO_TypeDef * crypto )

Quick read the MSbit of the DDATA1 register.

This function reads the most significant bit (bit 255) of the DDATA1 register via the DDATA1MSB bit field in the DSTATUS register. This can be used to quickly check the signedness of a big integer resident in the CRYPTO module.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
Returns
Returns 'true' if MSbit is 1, and 'false' if MSbit is 0.

Definition at line 1003 of file em_crypto.h .

__STATIC_INLINE void CRYPTO_DDataRead ( CRYPTO_DDataReg_TypeDef ddataReg,
CRYPTO_DData_TypeDef val
)

Read 256 bits of data from a DDATAX register in the CRYPTO module.

Read 256 bits of data from a DDATAX (Double Data) register in the crypto module. The data value is typically output from a big integer operation (see crypto instructions).

Parameters
[in] ddataReg The 256 bit DDATA register.
[out] val Location where to store the value in memory.

Definition at line 797 of file em_crypto.h .

References CRYPTO_BurstFromCrypto() .

Referenced by CRYPTO_DData0Read260() , and CRYPTO_SHA_256() .

__STATIC_INLINE void CRYPTO_DDataWrite ( CRYPTO_DDataReg_TypeDef ddataReg,
const CRYPTO_DData_TypeDef val
)

Write 256 bits of data to a DDATAX register in the CRYPTO module.

Write 256 bits of data into a DDATAX (Double Data) register in the crypto module. The data value is typically input to a big integer operation (see crypto instructions).

Parameters
[in] ddataReg The 256 bit DDATA register.
[in] val Value of the data to write to the DDATA register.

Definition at line 778 of file em_crypto.h .

References CRYPTO_BurstToCrypto() .

Referenced by CRYPTO_DData0Write260() , CRYPTO_KeyBufWrite() , and CRYPTO_SHA_256() .

__STATIC_INLINE void CRYPTO_IncWidthSet ( CRYPTO_TypeDef * crypto,
CRYPTO_IncWidth_TypeDef incWidth
)

Set the width of the DATA1 increment instruction DATA1INC.

This function sets the width of the DATA1 increment instruction CRYPTO_CMD_INSTR_DATA1INC.

Parameters
[in] crypto A pointer to CRYPTO peripheral register block.
[in] incWidth An incrementation width.

Definition at line 660 of file em_crypto.h .

__STATIC_INLINE bool CRYPTO_InstructionSequenceDone ( CRYPTO_TypeDef * crypto )

Check whether the execution of an instruction sequence has completed.

This function checks whether an instruction sequence has completed.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
Returns
Returns 'true' if the instruction sequence is done, and 'false' if not.

Definition at line 1068 of file em_crypto.h .

Referenced by CRYPTO_InstructionSequenceWait() .

__STATIC_INLINE void CRYPTO_InstructionSequenceExecute ( CRYPTO_TypeDef * crypto )

Execute the current programmed instruction sequence.

This function starts the execution of the current instruction sequence in the CRYPTO module.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.

Definition at line 1049 of file em_crypto.h .

Referenced by CRYPTO_AES_ProcessLoop() , and CRYPTO_Mul() .

__STATIC_INLINE void CRYPTO_InstructionSequenceLoad ( CRYPTO_TypeDef * crypto,
const CRYPTO_InstructionSequence_TypeDef instructionSequence
)

Load a sequence of instructions to be executed on the current values in the data registers.

This function loads a sequence of instructions to the crypto module. The instructions will be executed when the CRYPTO_InstructionSequenceExecute function is called. The first END marks the end of the sequence.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] instructionSequence An instruction sequence to load.

Definition at line 1026 of file em_crypto.h .

__STATIC_INLINE void CRYPTO_InstructionSequenceWait ( CRYPTO_TypeDef * crypto )

Wait for completion of the current sequence of instructions.

This function "busy"-waits until the execution of the ongoing instruction sequence has completed.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.

Definition at line 1086 of file em_crypto.h .

References CRYPTO_InstructionSequenceDone() .

Referenced by CRYPTO_AES_DecryptKey128() , CRYPTO_AES_DecryptKey256() , CRYPTO_AES_ProcessLoop() , CRYPTO_SHA_1() , and CRYPTO_SHA_256() .

__STATIC_INLINE void CRYPTO_InstructionWait ( CRYPTO_TypeDef * crypto )

Wait for completion of the current command.

This function "busy"-waits until the execution of the ongoing instruction has completed.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.

Definition at line 1103 of file em_crypto.h .

__STATIC_INLINE void CRYPTO_IntClear ( CRYPTO_TypeDef * crypto,
uint32_t flags
)

Clear one or more pending CRYPTO interrupts.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] flags A pending CRYPTO interrupt source to clear. Use a bitwise logic OR combination of valid interrupt flags for the CRYPTO module (CRYPTO_IF_nnn).

Definition at line 1233 of file em_crypto.h .

__STATIC_INLINE void CRYPTO_IntDisable ( CRYPTO_TypeDef * crypto,
uint32_t flags
)

Disable one or more CRYPTO interrupts.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] flags CRYPTO interrupt sources to disable. Use a bitwise logic OR combination of valid interrupt flags for the CRYPTO module (CRYPTO_IF_nnn).

Definition at line 1249 of file em_crypto.h .

__STATIC_INLINE void CRYPTO_IntEnable ( CRYPTO_TypeDef * crypto,
uint32_t flags
)

Enable one or more CRYPTO interrupts.

Note
Depending on the use, a pending interrupt may already be set prior to enabling the interrupt. Consider using CRYPTO_IntClear() prior to enabling if such a pending interrupt should be ignored.
Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] flags CRYPTO interrupt sources to enable. Use a bitwise logic OR combination of valid interrupt flags for the CRYPTO module (CRYPTO_IF_nnn).

Definition at line 1270 of file em_crypto.h .

__STATIC_INLINE uint32_t CRYPTO_IntGet ( CRYPTO_TypeDef * crypto )

Get pending CRYPTO interrupt flags.

Note
The event bits are not cleared by the use of this function.
Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
Returns
CRYPTO interrupt sources pending. A bitwise logic OR combination of valid interrupt flags for the CRYPTO module (CRYPTO_IF_nnn).

Definition at line 1289 of file em_crypto.h .

__STATIC_INLINE uint32_t CRYPTO_IntGetEnabled ( CRYPTO_TypeDef * crypto )

Get enabled and pending CRYPTO interrupt flags. Useful for handling more interrupt sources in the same interrupt handler.

Note
Interrupt flags are not cleared by the use of this function.
Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
Returns
Pending and enabled CRYPTO interrupt sources The return value is the bitwise AND of
  • the enabled interrupt sources in CRYPTO_IEN and
  • the pending interrupt flags CRYPTO_IF

Definition at line 1311 of file em_crypto.h .

__STATIC_INLINE void CRYPTO_IntSet ( CRYPTO_TypeDef * crypto,
uint32_t flags
)

Set one or more pending CRYPTO interrupts from software.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] flags CRYPTO interrupt sources to set to pending. Use a bitwise logic OR combination of valid interrupt flags for the CRYPTO module (CRYPTO_IF_nnn).

Definition at line 1334 of file em_crypto.h .

__STATIC_INLINE void CRYPTO_KeyBuf128Write ( CRYPTO_TypeDef * crypto,
const uint32_t * val
)

Quick write 128 bit key to the CRYPTO module.

Quick write 128 bit key to the KEYBUF register in the CRYPTO module.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] val Value of the data to write to the KEYBUF register.

Definition at line 895 of file em_crypto.h .

References CRYPTO_BurstToCrypto() .

__STATIC_INLINE void CRYPTO_KeyBufWrite ( CRYPTO_TypeDef * crypto,
CRYPTO_KeyBuf_TypeDef val,
CRYPTO_KeyWidth_TypeDef keyWidth
)

Set the key value to be used by the CRYPTO module.

Write 128 or 256 bit key to the KEYBUF register in the crypto module.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] val Value of the data to write to the KEYBUF register.
[in] keyWidth Key width - 128 or 256 bits.

Definition at line 862 of file em_crypto.h .

References BUS_RegBitWrite() , CRYPTO_BurstToCrypto() , CRYPTO_DDataWrite() , and cryptoKey256Bits .

Referenced by CRYPTO_KeyBufWriteUnaligned() .

__STATIC_INLINE void CRYPTO_KeyBufWriteUnaligned ( CRYPTO_TypeDef * crypto,
const uint8_t * val,
CRYPTO_KeyWidth_TypeDef keyWidth
)

Set the key value to be used by the CRYPTO module.

Write 128 or 256 bit key to the KEYBUF register in the crypto module.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] val Pointer to value to write to the KEYBUF register.
[in] keyWidth Key width - 128 or 256 bits.

Definition at line 1643 of file em_crypto.c .

References CRYPTO_KeyBufWrite() , and cryptoKey128Bits .

Referenced by CRYPTO_AES_CBCx() , CRYPTO_AES_CFBx() , CRYPTO_AES_CTRx() , CRYPTO_AES_ECBx() , CRYPTO_AES_OFBx() , and CRYPTO_AES_PCBCx() .

void CRYPTO_KeyRead ( CRYPTO_TypeDef * crypto,
CRYPTO_KeyBuf_TypeDef val,
CRYPTO_KeyWidth_TypeDef keyWidth
)

Read the key value currently used by the CRYPTO module.

Read 128 bits or 256 bits from the KEY register in the CRYPTO module.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] val A value of the data to write to the KEYBUF register.
[in] keyWidth Key width - 128 or 256 bits

Definition at line 261 of file em_crypto.c .

References CRYPTO_BurstFromCrypto() , and cryptoKey256Bits .

void CRYPTO_ModulusSet ( CRYPTO_TypeDef * crypto,
CRYPTO_ModulusId_TypeDef modulusId
)

Set the modulus type used for wide arithmetic operations.

Set the modulus used for wide modular operations.

This function sets the modulus type to be used by the modulus instructions of the CRYPTO module.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] modType A modulus type.

This function sets the modulus to be used by the modular instructions of the CRYPTO module.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] modulusId A modulus identifier.

Definition at line 207 of file em_crypto.c .

References cryptoModulusBin128 , cryptoModulusBin256 , cryptoModulusEccB163 , cryptoModulusEccB163KOrder , cryptoModulusEccB163Order , cryptoModulusEccB233 , cryptoModulusEccB233KOrder , cryptoModulusEccB233Order , cryptoModulusEccP192 , cryptoModulusEccP192Order , cryptoModulusEccP224 , cryptoModulusEccP224Order , cryptoModulusEccP256 , cryptoModulusEccP256Order , and cryptoModulusGcmBin128 .

void CRYPTO_Mul ( CRYPTO_TypeDef * crypto,
uint32_t * A,
int aSize,
uint32_t * B,
int bSize,
uint32_t * R,
int rSize
)

Multiply two big integers.

This function uses the CRYPTO unit to multiply two big integer operands. If USE_VARIABLE_SIZED_DATA_LOADS is defined, the sizes of the operands may be any multiple of 32 bits. If USE_VARIABLE_SIZED_DATA_LOADS is not defined, the sizes of the operands must be a multiple of 128 bits.

Parameters
[in] A An operand A
[in] aSize The size of the operand A in bits
[in] B An operand B
[in] bSize The size of the operand B in bits
[out] R The result of multiplication
[in] rSize The size of the result buffer R in bits

Definition at line 596 of file em_crypto.c .

References CRYPTO_CarryIsSet() , CRYPTO_DataRead() , CRYPTO_DataWrite() , CRYPTO_InstructionSequenceExecute() , cryptoBigintIncrement() , and cryptoBigintZeroize() .

__STATIC_INLINE void CRYPTO_MulOperandWidthSet ( CRYPTO_TypeDef * crypto,
CRYPTO_MulOperandWidth_TypeDef mulOperandWidth
)

Set the number of bits in the operands of the MUL instruction.

This function sets the number of bits to be used in the operands of the MUL instruction.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] mulOperandWidth Multiplication width in bits.

Definition at line 618 of file em_crypto.h .

__STATIC_INLINE void CRYPTO_QDataRead ( CRYPTO_QDataReg_TypeDef qdataReg,
CRYPTO_QData_TypeDef val
)

Read 512 bits of data from a QDATAX register in the CRYPTO module.

Read 512 bits of data from a QDATAX register in the crypto module. The data value is typically input to a big integer operation (see crypto instructions).

Parameters
[in] qdataReg The 512 bits QDATA register.
[in] val Value of the data to write to the QDATA register.

Definition at line 837 of file em_crypto.h .

References CRYPTO_BurstFromCrypto() .

__STATIC_INLINE void CRYPTO_QDataWrite ( CRYPTO_QDataReg_TypeDef qdataReg,
const CRYPTO_QData_TypeDef val
)

Write 512 bits of data to a QDATAX register in the CRYPTO module.

Write 512 bits of data into a QDATAX (Quad Data) register in the crypto module The data value is typically input to a big integer operation (see crypto instructions).

Parameters
[in] qdataReg The 512 bits QDATA register.
[in] val Value of the data to write to the QDATA register.

Definition at line 816 of file em_crypto.h .

References CRYPTO_BurstToCrypto() .

Referenced by CRYPTO_SHA_1() , and CRYPTO_SHA_256() .

__STATIC_INLINE void CRYPTO_ResultWidthSet ( CRYPTO_TypeDef * crypto,
CRYPTO_ResultWidth_TypeDef resultWidth
)

Set the width of the results of the non-modulus instructions.

This function sets the result width of the non-modulus instructions.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] resultWidth A result width of non-modulus instructions.

Definition at line 639 of file em_crypto.h .

Referenced by CRYPTO_SHA_1() , and CRYPTO_SHA_256() .

void CRYPTO_SHA_1 ( CRYPTO_TypeDef * crypto,
const uint8_t * msg,
uint64_t msgLen,
CRYPTO_SHA1_Digest_TypeDef msgDigest
)

Perform a SHA-1 hash operation on a message.

This function performs a SHA-1 hash operation on the message specified by msg with length msgLen and returns the message digest in msgDigest.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] msg Message to hash.
[in] msgLen Length of message in bytes.
[out] msgDigest A message digest.

Definition at line 293 of file em_crypto.c .

References CRYPTO_InstructionSequenceWait() , CRYPTO_QDataWrite() , CRYPTO_ResultWidthSet() , and cryptoResult256Bits .

void CRYPTO_SHA_256 ( CRYPTO_TypeDef * crypto,
const uint8_t * msg,
uint64_t msgLen,
CRYPTO_SHA256_Digest_TypeDef msgDigest
)

Perform a SHA-256 hash operation on a message.

This function performs a SHA-256 hash operation on the message specified by msg with length msgLen and returns the message digest in msgDigest.

Parameters
[in] crypto A pointer to the CRYPTO peripheral register block.
[in] msg A message to hash.
[in] msgLen The length of message in bytes.
[out] msgDigest A message digest.

Definition at line 431 of file em_crypto.c .

References CRYPTO_DDataRead() , CRYPTO_DDataWrite() , CRYPTO_InstructionSequenceWait() , CRYPTO_QDataWrite() , CRYPTO_ResultWidthSet() , and cryptoResult256Bits .

__STATIC_INLINE void cryptoBigintIncrement ( uint32_t * words32bits,
unsigned num32bitWords
)

Increment value of 32bit word array by one.

Parameters
[in] words32bits Pointer to 32bit word array
[in] num32bitWords Number of 32bit words in array

Definition at line 567 of file em_crypto.c .

Referenced by CRYPTO_Mul() .

__STATIC_INLINE void cryptoBigintZeroize ( uint32_t * words32bits,
unsigned num32bitWords
)

Set the 32 bit word array to zero.

Parameters
[in] words32bits A pointer to the 32 bit word array.
[in] num32bitWords A number of 32 bit words in array.

Definition at line 551 of file em_crypto.c .

Referenced by CRYPTO_Mul() .