asn1_get_length_der(3) API function


#include <libtasn1.h>

long asn1_get_length_der(const unsigned char * der, int der_len, int * len);


const unsigned char * der
DER data to decode.
int der_len
Length of DER data to decode.
int * len
Output variable containing the length of the DER length field.


Extract a length field from DER data.


Return the decoded length value, or -1 on indefinite length, or -2 when the value was too big to fit in a int, or -4 when the decoded length value plus len would exceed der_len.


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