You are viewing documentation for version: 4.0 | Version History mbedtls_asn1_bitstring Struct ReferenceAsn1_module Container for ASN1 bit strings. #include <asn1.h> Data Fields size_t len ASN1 length, in octets. unsigned char unused_bits Number of unused bits at the end of the string. unsigned char * p Raw ASN1 data for the bit string. Container for ASN1 bit strings.