asn1_bit_der (3) - Linux Manuals

asn1_bit_der: API function


asn1_bit_der - API function


#include <libtasn1.h>

void asn1_bit_der(const unsigned char * str, int bit_len, unsigned char * der, int * der_len);


const unsigned char * str
BIT string.
int bit_len
number of meaningful bits in STR.
unsigned char * der
string returned.
int * der_len
number of meaningful bytes of DER (der[0]..der[ans_len-1]).


Creates a length-value DER encoding for the input data as it would have been for a BIT STRING. The DER encoded data will be copied in der .

Note that the BIT STRING tag is not included in the output.

This function does not return any value because it is expected that der_len will contain enough bytes to store the string plus the DER encoding. The DER encoding size can be obtained using asn1_length_der().


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