CRYPTO - Cryptography Accelerator#

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 backward compatibility. The following list summarizes the em_crypto.h interface:

AES (Advanced Encryption Standard) AES
SHA (Secure Hash Algorithm) SHA
Big Integer multiplier CRYPTO_Mul
Functions for loading data and executing instruction sequences Load and Execute Instruction Sequences

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, i.e., 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.

You can 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

SHA-1 CRYPTO_SHA_1
SHA-256 CRYPTO_SHA_256

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 32-bit words of variable size. Compile with -D USE_VARIABLE_SIZED_DATA_LOADS 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, such as elliptic curve cryptography (ECC)) and authenticated encryption algorithms. There are two typical modes of operation, as follows:

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:

CRYPTO_DataWrite - Write 128 bits to a DATA register.
CRYPTO_DDataWrite - Write 256 bits to a DDATA register.
CRYPTO_QDataWrite - Write 512 bits to a QDATA register.

To read output data from the CRYPTO module use any of the following functions:

CRYPTO_DataRead - Read 128 bits from a DATA register.
CRYPTO_DDataRead - Read 256 bits from a DDATA register.
CRYPTO_QDataRead - Read 512 bits from a QDATA register.

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.

Enumerations#

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

}

CRYPTO modulus identifiers.

enum

CRYPTO_MulOperandWidth_TypeDef {

cryptoMulOperand256Bits = CRYPTO_WAC_MULWIDTH_MUL256

cryptoMulOperand128Bits = CRYPTO_WAC_MULWIDTH_MUL128

cryptoMulOperandModulusBits = CRYPTO_WAC_MULWIDTH_MULMOD

}

CRYPTO multiplication widths for wide arithmetic operations.

enum

CRYPTO_ResultWidth_TypeDef {

cryptoResult128Bits = CRYPTO_WAC_RESULTWIDTH_128BIT

cryptoResult256Bits = CRYPTO_WAC_RESULTWIDTH_256BIT

cryptoResult260Bits = CRYPTO_WAC_RESULTWIDTH_260BIT

}

CRYPTO result widths for MUL operations.

enum

CRYPTO_IncWidth_TypeDef {

cryptoInc1byte = CRYPTO_CTRL_INCWIDTH_INCWIDTH1

cryptoInc2byte = CRYPTO_CTRL_INCWIDTH_INCWIDTH2

cryptoInc3byte = CRYPTO_CTRL_INCWIDTH_INCWIDTH3

cryptoInc4byte = CRYPTO_CTRL_INCWIDTH_INCWIDTH4

}

CRYPTO result widths for MUL operations.

enum

CRYPTO_KeyWidth_TypeDef {

cryptoKey128Bits = 8

cryptoKey256Bits = 16

}

CRYPTO key width.

Typedefs#

typedef uint32_t

CRYPTO_Data_TypeDef[CRYPTO_DATA_SIZE_IN_32BIT_WORDS]

CRYPTO data types used for data load functions.

typedef uint32_t

CRYPTO_DData_TypeDef[CRYPTO_DDATA_SIZE_IN_32BIT_WORDS]

CRYPTO data type used for data load functions.

typedef uint32_t

CRYPTO_QData_TypeDef[CRYPTO_QDATA_SIZE_IN_32BIT_WORDS]

CRYPTO data type used for data load functions.

typedef uint32_t

CRYPTO_Data260_TypeDef[CRYPTO_DATA260_SIZE_IN_32BIT_WORDS]

CRYPTO data type used for data load functions.

typedef uint32_t

CRYPTO_KeyBuf_TypeDef[CRYPTO_KEYBUF_SIZE_IN_32BIT_WORDS]

CRYPTO data type used for data load functions.

typedef volatile uint32_t *

CRYPTO_DataReg_TypeDef

CRYPTO 128 bit Data register pointer type.

typedef volatile uint32_t *

CRYPTO_DDataReg_TypeDef

CRYPTO 256 bit DData (Double Data) register pointer type.

typedef volatile uint32_t *

CRYPTO_QDataReg_TypeDef

CRYPTO 512 bit QData (Quad data) register pointer type.

typedef uint8_t

CRYPTO_InstructionSequence_TypeDef[CRYPTO_MAX_SEQUENCE_INSTRUCTIONS]

Instruction sequence type.

typedef uint8_t

CRYPTO_SHA1_Digest_TypeDef[CRYPTO_SHA1_DIGEST_SIZE_IN_BYTES]

SHA-1 Digest type.

typedef uint8_t

CRYPTO_SHA256_Digest_TypeDef[CRYPTO_SHA256_DIGEST_SIZE_IN_BYTES]

SHA-256 Digest type.

typedef void(*

CRYPTO_AES_CtrFuncPtr_TypeDef)(uint8_t *ctr)

AES counter modification function pointer.

Functions#

void

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

Write a 128 bit value into a crypto register.

void

CRYPTO_BurstFromCrypto(volatile uint32_t *reg, uint32_t *val)

Read a 128 bit value from a crypto register.

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.

void

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

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

void

CRYPTO_DataRead(CRYPTO_DataReg_TypeDef dataReg, CRYPTO_Data_TypeDef val)

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

void

CRYPTO_DataReadUnaligned(volatile uint32_t *reg, uint8_t *val)

Read 128 bits of data from a DATAX register in the CRYPTO module to an unaligned pointer.

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.

void

CRYPTO_DDataRead(CRYPTO_DDataReg_TypeDef ddataReg, CRYPTO_DData_TypeDef val)

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

void

CRYPTO_DDataReadUnaligned(CRYPTO_DDataReg_TypeDef ddataReg, uint8_t *val)

Read 256 bits of data from a DDATAX register in the CRYPTO module to an unaligned pointer.

void

CRYPTO_QDataRead(CRYPTO_QDataReg_TypeDef qdataReg, CRYPTO_QData_TypeDef val)

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

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.

void

CRYPTO_QDataWriteUnaligned(CRYPTO_QDataReg_TypeDef qdataReg, const uint8_t *val)

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

void

cryptoBurstToCryptoAndZeroize(volatile uint32_t *reg, const uint32_t *val)

void

cryptoBurstFromCryptoAndZeroize(volatile uint32_t *reg, uint32_t *val)

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.

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_KeyBuf128Write(CRYPTO_TypeDef *crypto, const uint32_t *val)

Quick write 128 bit key to the CRYPTO module.

void

CRYPTO_ModulusSet(CRYPTO_TypeDef *crypto, CRYPTO_ModulusId_TypeDef modulusId)

Set the modulus type used for wide arithmetic operations.

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_KeyReadUnaligned(CRYPTO_TypeDef *crypto, uint8_t *val, CRYPTO_KeyWidth_TypeDef keyWidth)

Read the key value currently used by the CRYPTO module.

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.

void

cryptoBigintZeroize(uint32_t *words32bits, unsigned num32bitWords)

Set the 32 bit word array to zero.

void

cryptoBigintIncrement(uint32_t *words32bits, unsigned num32bitWords)

Increment value of 32bit word array by one.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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_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.

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_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_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_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_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.

void

CRYPTO_MulOperandWidthSet(CRYPTO_TypeDef *crypto, CRYPTO_MulOperandWidth_TypeDef mulOperandWidth)

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

void

CRYPTO_ResultWidthSet(CRYPTO_TypeDef *crypto, CRYPTO_ResultWidth_TypeDef resultWidth)

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

void

CRYPTO_IncWidthSet(CRYPTO_TypeDef *crypto, CRYPTO_IncWidth_TypeDef incWidth)

Set the width of the DATA1 increment instruction DATA1INC.

bool

CRYPTO_CarryIsSet(CRYPTO_TypeDef *crypto)

Quick read access of the carry bit from arithmetic operations.

uint8_t

CRYPTO_DData0_4LSBitsRead(CRYPTO_TypeDef *crypto)

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

void

CRYPTO_DData0Read260(CRYPTO_TypeDef *crypto, CRYPTO_Data260_TypeDef val)

Read 260 bits from the DDATA0 register.

void

CRYPTO_DData0Write260(CRYPTO_TypeDef *crypto, const CRYPTO_Data260_TypeDef val)

Write 260 bits to the DDATA0 register.

bool

CRYPTO_DData1_MSBitRead(CRYPTO_TypeDef *crypto)

Quick read the MSbit of the DDATA1 register.

CRYPTO_WARNINGS_NO_CAST_ALIGN 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.

CRYPTO_WARNINGS_RESET void

CRYPTO_InstructionSequenceExecute(CRYPTO_TypeDef *crypto)

Execute the current programmed instruction sequence.

bool

CRYPTO_InstructionSequenceDone(CRYPTO_TypeDef *crypto)

Check whether the execution of an instruction sequence has completed.

void

CRYPTO_InstructionSequenceWait(CRYPTO_TypeDef *crypto)

Wait for completion of the current sequence of instructions.

void

CRYPTO_InstructionWait(CRYPTO_TypeDef *crypto)

Wait for completion of the current command.

void

CRYPTO_IntClear(CRYPTO_TypeDef *crypto, uint32_t flags)

Clear one or more pending CRYPTO interrupts.

void

CRYPTO_IntDisable(CRYPTO_TypeDef *crypto, uint32_t flags)

Disable one or more CRYPTO interrupts.

void

CRYPTO_IntEnable(CRYPTO_TypeDef *crypto, uint32_t flags)

Enable one or more CRYPTO interrupts.

uint32_t

CRYPTO_IntGet(CRYPTO_TypeDef *crypto)

Get pending CRYPTO interrupt flags.

uint32_t

CRYPTO_IntGetEnabled(CRYPTO_TypeDef *crypto)

Get enabled and pending CRYPTO interrupt flags.

void

CRYPTO_IntSet(CRYPTO_TypeDef *crypto, uint32_t flags)

Set one or more pending CRYPTO interrupts from software.

Macros#

#define

CRYPTO_MAX_SEQUENCE_INSTRUCTIONS (20)

The maximum number of crypto instructions in an instruction sequence.

#define

CRYPTO_INSTRUCTIONSEQUENSE_DEFAULT undefined

Default instruction sequence consisting of all ENDs.

Enumeration Documentation#

CRYPTO_ModulusId_TypeDef#

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 499 of file platform/emlib/inc/em_crypto.h

CRYPTO_MulOperandWidth_TypeDef#

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 518 of file platform/emlib/inc/em_crypto.h

CRYPTO_ResultWidth_TypeDef#

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 527 of file platform/emlib/inc/em_crypto.h

CRYPTO_IncWidth_TypeDef#

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 534 of file platform/emlib/inc/em_crypto.h

CRYPTO_KeyWidth_TypeDef#

CRYPTO_KeyWidth_TypeDef

CRYPTO key width.

Enumerator
cryptoKey128Bits	Key width is 128 bits.
cryptoKey256Bits	Key width is 256 bits.

Definition at line 542 of file platform/emlib/inc/em_crypto.h

Typedef Documentation#

CRYPTO_Data_TypeDef#

typedef uint32_t CRYPTO_Data_TypeDef[CRYPTO_DATA_SIZE_IN_32BIT_WORDS] [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 441 of file platform/emlib/inc/em_crypto.h

CRYPTO_DData_TypeDef#

typedef uint32_t CRYPTO_DData_TypeDef[CRYPTO_DDATA_SIZE_IN_32BIT_WORDS] [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 448 of file platform/emlib/inc/em_crypto.h

CRYPTO_QData_TypeDef#

typedef uint32_t CRYPTO_QData_TypeDef[CRYPTO_QDATA_SIZE_IN_32BIT_WORDS] [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 459 of file platform/emlib/inc/em_crypto.h

CRYPTO_Data260_TypeDef#

typedef uint32_t CRYPTO_Data260_TypeDef[CRYPTO_DATA260_SIZE_IN_32BIT_WORDS] [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 469 of file platform/emlib/inc/em_crypto.h

CRYPTO_KeyBuf_TypeDef#

typedef uint32_t CRYPTO_KeyBuf_TypeDef[CRYPTO_KEYBUF_SIZE_IN_32BIT_WORDS] [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 475 of file platform/emlib/inc/em_crypto.h

CRYPTO_DataReg_TypeDef#

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 482 of file platform/emlib/inc/em_crypto.h

CRYPTO_DDataReg_TypeDef#

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 489 of file platform/emlib/inc/em_crypto.h

CRYPTO_QDataReg_TypeDef#

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 496 of file platform/emlib/inc/em_crypto.h

CRYPTO_InstructionSequence_TypeDef#

typedef uint8_t CRYPTO_InstructionSequence_TypeDef[CRYPTO_MAX_SEQUENCE_INSTRUCTIONS] [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 559 of file platform/emlib/inc/em_crypto.h

CRYPTO_SHA1_Digest_TypeDef#

typedef uint8_t CRYPTO_SHA1_Digest_TypeDef[CRYPTO_SHA1_DIGEST_SIZE_IN_BYTES] [CRYPTO_SHA1_DIGEST_SIZE_IN_BYTES]

SHA-1 Digest type.

Definition at line 575 of file platform/emlib/inc/em_crypto.h

CRYPTO_SHA256_Digest_TypeDef#

typedef uint8_t CRYPTO_SHA256_Digest_TypeDef[CRYPTO_SHA256_DIGEST_SIZE_IN_BYTES] [CRYPTO_SHA256_DIGEST_SIZE_IN_BYTES]

SHA-256 Digest type.

Definition at line 578 of file platform/emlib/inc/em_crypto.h

CRYPTO_AES_CtrFuncPtr_TypeDef#

typedef void(* CRYPTO_AES_CtrFuncPtr_TypeDef) (uint8_t *ctr) )(uint8_t *ctr)

AES counter modification function pointer.

Parameters

[in]

ctr

A counter value to be modified.

Note

This is defined for backwards compatibility with EFM32 em_aes.h. The CRYPTO implementation of counter mode does not support counter update callbacks.

Definition at line 591 of file platform/emlib/inc/em_crypto.h

Function Documentation#

CRYPTO_BurstToCrypto#

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

Write a 128 bit value into a crypto register.

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.

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.

Definition at line 196 of file platform/emlib/src/em_crypto.c

CRYPTO_BurstFromCrypto#

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

Read a 128 bit value from a crypto register.

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.

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.

Definition at line 211 of file platform/emlib/src/em_crypto.c

CRYPTO_DataWrite#

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.

Parameters

[in]	dataReg	The 128 bit DATA register.
[in]	val	Value of the data to write to the DATA register. Has to be word-aligned.

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).

Definition at line 225 of file platform/emlib/src/em_crypto.c

CRYPTO_DataWriteUnaligned#

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

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

Parameters

[in]	reg	The 128 bit DATA register.
[in]	val	Pointer to value to write to the DATA register. Can be unaligned.

Write 128 bits of unaligned data to a DATAX register in the CRYPTO module. The data pointer does not have to be word-aligned, but an unaligned pointer might incur a performance hit.

Definition at line 231 of file platform/emlib/src/em_crypto.c

CRYPTO_DataRead#

CRYPTO_WARNINGS_RESET void CRYPTO_DataRead (CRYPTO_DataReg_TypeDef dataReg, CRYPTO_Data_TypeDef 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. Has to be word-aligned.

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)

Definition at line 249 of file platform/emlib/src/em_crypto.c

CRYPTO_DataReadUnaligned#

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

Read 128 bits of data from a DATAX register in the CRYPTO module to an unaligned pointer.

Parameters

[in]	reg	The 128 bit DATA register.
[out]	val	Location where to store the value in memory. Can be unaligned.

Write 128 bits of unaligned data to a DATAX register in the CRYPTO module to an unaligned pointer. The output pointer does not have to be word-aligned, but an unaligned pointer might incur a performance penalty.

Definition at line 255 of file platform/emlib/src/em_crypto.c

CRYPTO_DDataWrite#

CRYPTO_WARNINGS_RESET 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.

Parameters

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

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).

Definition at line 273 of file platform/emlib/src/em_crypto.c

CRYPTO_DDataRead#

void CRYPTO_DDataRead (CRYPTO_DDataReg_TypeDef ddataReg, CRYPTO_DData_TypeDef val)

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

Parameters

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

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).

Definition at line 280 of file platform/emlib/src/em_crypto.c

CRYPTO_DDataReadUnaligned#

CRYPTO_WARNINGS_NO_CAST_ALIGN void CRYPTO_DDataReadUnaligned (CRYPTO_DDataReg_TypeDef ddataReg, uint8_t * val)

Read 256 bits of data from a DDATAX register in the CRYPTO module to an unaligned pointer.

Parameters

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

Read 256 bits from a DDATAX register in the CRYPTO module. The output buffer pointer does not have to be word-aligned, but an unaligned pointer might incur a performance penalty.

Definition at line 287 of file platform/emlib/src/em_crypto.c

CRYPTO_QDataRead#

CRYPTO_WARNINGS_RESET void CRYPTO_QDataRead (CRYPTO_QDataReg_TypeDef qdataReg, CRYPTO_QData_TypeDef val)

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

Parameters

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

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).

Definition at line 305 of file platform/emlib/src/em_crypto.c

CRYPTO_QDataWrite#

CRYPTO_WARNINGS_RESET 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.

Parameters

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

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).

Definition at line 314 of file platform/emlib/src/em_crypto.c

CRYPTO_QDataWriteUnaligned#

CRYPTO_WARNINGS_NO_CAST_ALIGN void CRYPTO_QDataWriteUnaligned (CRYPTO_QDataReg_TypeDef qdataReg, const uint8_t * val)

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

Parameters

[in]	qdataReg	The 512 bits QDATA register.
[in]	val	Pointer to value to write to the QDATA register. Can be unaligned.

Write 512 bits of unaligned data to a QDATAX register in the CRYPTO module. The data pointer does not have to be word-aligned, but an unaligned pointer might incur a performance hit.

Definition at line 323 of file platform/emlib/src/em_crypto.c

cryptoBurstToCryptoAndZeroize#

void cryptoBurstToCryptoAndZeroize (volatile uint32_t * reg, const uint32_t * val)

Parameters

N/A	reg
N/A	val

Definition at line 344 of file platform/emlib/src/em_crypto.c

cryptoBurstFromCryptoAndZeroize#

void cryptoBurstFromCryptoAndZeroize (volatile uint32_t * reg, uint32_t * val)

Parameters

N/A	reg
N/A	val

Definition at line 366 of file platform/emlib/src/em_crypto.c

CRYPTO_KeyBufWrite#

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.

Parameters

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

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

Definition at line 384 of file platform/emlib/src/em_crypto.c

CRYPTO_KeyBufWriteUnaligned#

CRYPTO_WARNINGS_NO_CAST_ALIGN 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.

Parameters

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

Write 128 or 256 bit key to the KEYBUF register in the crypto module. The input key buffer does not have to be word-aligned, but an unaligned value might incur a performance penalty.

Definition at line 401 of file platform/emlib/src/em_crypto.c

CRYPTO_KeyBuf128Write#

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

Quick write 128 bit key to 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.

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

Definition at line 429 of file platform/emlib/src/em_crypto.c

CRYPTO_ModulusSet#

void CRYPTO_ModulusSet (CRYPTO_TypeDef * crypto, CRYPTO_ModulusId_TypeDef modulusId)

Set the modulus type used for wide arithmetic operations.

Parameters

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

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

Definition at line 435 of file platform/emlib/src/em_crypto.c

CRYPTO_KeyRead#

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

Read the key value currently used by 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

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

Definition at line 489 of file platform/emlib/src/em_crypto.c

CRYPTO_KeyReadUnaligned#

void CRYPTO_KeyReadUnaligned (CRYPTO_TypeDef * crypto, uint8_t * val, CRYPTO_KeyWidth_TypeDef keyWidth)

Read the key value currently used by the CRYPTO module.

Parameters

[in]	crypto	A pointer to the CRYPTO peripheral register block.
[in]	val	A pointer to a buffer which the key will be written to. Can be unaligned.
[in]	keyWidth	Key width - 128 or 256 bits

Read 128 bits or 256 bits from the KEY register in the CRYPTO module. The destination pointer does not have to be word-aligned, but an unaligned pointer might incur a performance penalty.

Definition at line 520 of file platform/emlib/src/em_crypto.c

CRYPTO_SHA_1#

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.

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.

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

Definition at line 566 of file platform/emlib/src/em_crypto.c

CRYPTO_SHA_256#

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.

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.

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

Definition at line 713 of file platform/emlib/src/em_crypto.c

cryptoBigintZeroize#

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 833 of file platform/emlib/src/em_crypto.c

cryptoBigintIncrement#

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 849 of file platform/emlib/src/em_crypto.c

CRYPTO_Mul#

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.

Parameters

[in]	crypto	CRYPTO module
[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

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.

Definition at line 879 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CBC128#

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.

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.

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.

Definition at line 1127 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CBC256#

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.

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.

See CRYPTO_AES_CBC128() for the CBC figure.

See general comments on layout and byte ordering of parameters.

Definition at line 1173 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_PCBC128#

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.

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.

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.

Definition at line 1250 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_PCBC256#

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.

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.

See CRYPTO_AES_PCBC128() for the PCBC figure.

See general comments on layout and byte ordering of parameters.

Definition at line 1296 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CFB128#

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.

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.

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.

Definition at line 1369 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CFB256#

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.

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.

See CRYPTO_AES_CFB128() for the CFB figure.

See general comments on layout and byte ordering of parameters.

Definition at line 1412 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CTR128#

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.

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.
[inout]	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.

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.

Definition at line 1488 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CTR256#

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.

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.
[inout]	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.

See CRYPTO_AES_CTR128() for CTR figure.

See general comments on layout and byte ordering of parameters.

Definition at line 1534 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CTRUpdate32Bit#

void CRYPTO_AES_CTRUpdate32Bit (uint8_t * ctr)

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

Parameters

[inout]

ctr

A buffer holding 128 bit counter to be updated.

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.

Definition at line 1560 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_DecryptKey128#

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.

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.

The decryption key is used for some cipher modes when decrypting.

See general comments on layout and byte ordering of parameters.

Definition at line 1585 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_DecryptKey256#

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.

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.

The decryption key is used for some cipher modes when decrypting.

See general comments on layout and byte ordering of parameters.

Definition at line 1623 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_ECB128#

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.

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.

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.

Definition at line 1700 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_ECB256#

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.

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.

See CRYPTO_AES_ECB128() for ECB figure.

See general comments on layout and byte ordering of parameters.

Definition at line 1742 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_OFB128#

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.

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.

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.

Definition at line 1813 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_OFB256#

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.

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.

See CRYPTO_AES_OFB128() for OFB figure.

See general comments on layout and byte ordering of parameters.

Definition at line 1852 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CBCx#

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.

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.

See CRYPTO_AES_CBC128() for CBC figure.

See general comments on layout and byte ordering of parameters.

Definition at line 1903 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_PCBCx#

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.

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.

See CRYPTO_AES_PCBC128() for PCBC figure.

See general comments on layout and byte ordering of parameters.

Definition at line 1976 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CFBx#

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.

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.

See CRYPTO_AES_CFB128() for CFB figure.

See general comments on layout and byte ordering of parameters.

Definition at line 2048 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_CTRx#

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.

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.
[inout]	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.

See CRYPTO_AES_CTR128() for CTR figure.

See general comments on layout and byte ordering of parameters.

Definition at line 2126 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_ECBx#

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.

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.

See CRYPTO_AES_ECB128() for ECB figure.

See general comments on layout and byte ordering of parameters.

Definition at line 2193 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_OFBx#

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.

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.

See CRYPTO_AES_OFB128() for OFB figure.

See general comments on layout and byte ordering of parameters.

Definition at line 2253 of file platform/emlib/src/em_crypto.c

CRYPTO_AES_ProcessLoop#

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.

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.

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

Definition at line 2310 of file platform/emlib/src/em_crypto.c

CRYPTO_MulOperandWidthSet#

void CRYPTO_MulOperandWidthSet (CRYPTO_TypeDef * crypto, CRYPTO_MulOperandWidth_TypeDef mulOperandWidth)

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

Parameters

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

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

Definition at line 629 of file platform/emlib/inc/em_crypto.h

CRYPTO_ResultWidthSet#

void CRYPTO_ResultWidthSet (CRYPTO_TypeDef * crypto, CRYPTO_ResultWidth_TypeDef resultWidth)

Set the width of the results 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.

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

Definition at line 650 of file platform/emlib/inc/em_crypto.h

CRYPTO_IncWidthSet#

void CRYPTO_IncWidthSet (CRYPTO_TypeDef * crypto, CRYPTO_IncWidth_TypeDef incWidth)

Set the width of the DATA1 increment instruction DATA1INC.

Parameters

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

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

Definition at line 671 of file platform/emlib/inc/em_crypto.h

CRYPTO_CarryIsSet#

bool CRYPTO_CarryIsSet (CRYPTO_TypeDef * crypto)

Quick read access of the carry bit from arithmetic operations.

Parameters

[in]

crypto

A pointer to the CRYPTO peripheral register block.

This function reads the carry bit of the CRYPTO ALU.

Returns

Returns 'true' if carry is 1, and 'false' if carry is 0.

Definition at line 964 of file platform/emlib/inc/em_crypto.h

CRYPTO_DData0_4LSBitsRead#

uint8_t CRYPTO_DData0_4LSBitsRead (CRYPTO_TypeDef * crypto)

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

Parameters

[in]

crypto

A pointer to the CRYPTO peripheral register block.

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

Returns

Returns the 4 LSbits of DDATA0.

Definition at line 984 of file platform/emlib/inc/em_crypto.h

CRYPTO_DData0Read260#

void CRYPTO_DData0Read260 (CRYPTO_TypeDef * crypto, CRYPTO_Data260_TypeDef val)

Read 260 bits from the DDATA0 register.

Parameters

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

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);

Definition at line 1006 of file platform/emlib/inc/em_crypto.h

CRYPTO_DData0Write260#

void CRYPTO_DData0Write260 (CRYPTO_TypeDef * crypto, const CRYPTO_Data260_TypeDef val)

Write 260 bits to the DDATA0 register.

Parameters

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

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);

Definition at line 1030 of file platform/emlib/inc/em_crypto.h

CRYPTO_DData1_MSBitRead#

bool CRYPTO_DData1_MSBitRead (CRYPTO_TypeDef * crypto)

Quick read the MSbit of the DDATA1 register.

Parameters

[in]

crypto

A pointer to the CRYPTO peripheral register block.

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.

Returns

Returns 'true' if MSbit is 1, and 'false' if MSbit is 0.

Definition at line 1053 of file platform/emlib/inc/em_crypto.h

CRYPTO_InstructionSequenceLoad#

CRYPTO_WARNINGS_NO_CAST_ALIGN 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.

Parameters

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

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.

Definition at line 1077 of file platform/emlib/inc/em_crypto.h

CRYPTO_InstructionSequenceExecute#

CRYPTO_WARNINGS_RESET void CRYPTO_InstructionSequenceExecute (CRYPTO_TypeDef * crypto)

Execute the current programmed instruction sequence.

Parameters

[in]

crypto

A pointer to the CRYPTO peripheral register block.

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

Definition at line 1101 of file platform/emlib/inc/em_crypto.h

CRYPTO_InstructionSequenceDone#

bool CRYPTO_InstructionSequenceDone (CRYPTO_TypeDef * crypto)

Check whether the execution of an instruction sequence has completed.

Parameters

[in]

crypto

A pointer to the CRYPTO peripheral register block.

This function checks whether an instruction sequence has completed.

Returns

Returns 'true' if the instruction sequence is done, and 'false' if not.

Definition at line 1120 of file platform/emlib/inc/em_crypto.h

CRYPTO_InstructionSequenceWait#

void CRYPTO_InstructionSequenceWait (CRYPTO_TypeDef * crypto)

Wait for completion of the current sequence of instructions.

Parameters

[in]

crypto

A pointer to the CRYPTO peripheral register block.

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

Definition at line 1138 of file platform/emlib/inc/em_crypto.h

CRYPTO_InstructionWait#

void CRYPTO_InstructionWait (CRYPTO_TypeDef * crypto)

Wait for completion of the current command.

Parameters

[in]

crypto

A pointer to the CRYPTO peripheral register block.

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

Definition at line 1155 of file platform/emlib/inc/em_crypto.h

CRYPTO_IntClear#

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 1285 of file platform/emlib/inc/em_crypto.h

CRYPTO_IntDisable#

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 1301 of file platform/emlib/inc/em_crypto.h

CRYPTO_IntEnable#

void CRYPTO_IntEnable (CRYPTO_TypeDef * crypto, uint32_t flags)

Enable one or more CRYPTO interrupts.

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).

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.

Definition at line 1322 of file platform/emlib/inc/em_crypto.h

CRYPTO_IntGet#

uint32_t CRYPTO_IntGet (CRYPTO_TypeDef * crypto)

Get pending CRYPTO interrupt flags.

Parameters

[in]

crypto

A pointer to the CRYPTO peripheral register block.

Note

The event bits are not cleared by the use of this function.

Returns

CRYPTO interrupt sources pending. A bitwise logic OR combination of valid interrupt flags for the CRYPTO module (CRYPTO_IF_nnn).

Definition at line 1341 of file platform/emlib/inc/em_crypto.h

CRYPTO_IntGetEnabled#

uint32_t CRYPTO_IntGetEnabled (CRYPTO_TypeDef * crypto)

Get enabled and pending CRYPTO interrupt flags.

Parameters

[in]

crypto

A pointer to the CRYPTO peripheral register block.

Useful for handling more interrupt sources in the same interrupt handler.

Note

Interrupt flags are not cleared by the use of this function.

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 1363 of file platform/emlib/inc/em_crypto.h

CRYPTO_IntSet#

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 1386 of file platform/emlib/inc/em_crypto.h

Macro Definition Documentation#

CRYPTO_MAX_SEQUENCE_INSTRUCTIONS#

#define CRYPTO_MAX_SEQUENCE_INSTRUCTIONS

Value:

(20)

The maximum number of crypto instructions in an instruction sequence.

Definition at line 550 of file platform/emlib/inc/em_crypto.h

CRYPTO_INSTRUCTIONSEQUENSE_DEFAULT#

#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 }

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 565 of file platform/emlib/inc/em_crypto.h