asn1_length_der man page
asn1_length_der — API function
void asn1_length_der(unsigned long int len, unsigned char * der, int * der_len);
- unsigned long int len
value to convert.
- unsigned char * der
buffer to hold the returned encoding (may be NULL).
- int * der_len
number of meaningful bytes of ANS (der..der[der_len-1]).
Creates the DER encoding of the provided length value. The der buffer must have enough room for the output. The maximum length this function will encode is ASN1_MAX_LENGTH_SIZE.
To know the size of the DER encoding use a NULL value for der .
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