asn1_octet_der man page

asn1_octet_der — API function


#include <libtasn1.h>

void asn1_octet_der(const unsigned char * str, int str_len, unsigned char * der, int * der_len);


const unsigned char * str

the input data.

int str_len

STR length (str[0]..str[*str_len-1]).

unsigned char * der

encoded string returned.

int * der_len

number of meaningful bytes of DER (der[0]..der[der_len-1]).


Creates a length-value DER encoding for the input data. The DER encoding of the input data will be placed in the  der variable.

Note that the OCTET 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().

See Also

The full documentation for libtasn1 is maintained as a Texinfo manual.  If the info and libtasn1 programs are properly installed at your site, the command

info libtasn1

should give you access to the complete manual. As an alternative you may obtain the manual from:


4.8 libtasn1