asn1_der_decoding23

Usage

Arguments

asn1_node * element

pointer to an ASN1 structure.

const void * ider

vector that contains the DER encoding.

int * max_ider_len

pointer to an integer giving the information about the maximal number of bytes occupied by * ider . The real size of the DER encoding is returned through this pointer.

unsigned int flags

flags controlling the behaviour of the function.

char * errorDescription

null-terminated string contains details when an error occurred.

Overview

Fill the structure * element with values of a DER encoding string. The structure must just be created with function asn1_create_element().

If ASN1_DECODE_FLAG_ALLOW_PADDING flag is set then the function will ignore padding after the decoded DER data. Upon a successful return the value of * max_ider_len will be set to the number of bytes decoded.

If ASN1_DECODE_FLAG_STRICT_DER flag is set then the function will not decode any BER-encoded elements.

Returns

ASN1_SUCCESS if DER encoding OK, ASN1_ELEMENT_NOT_FOUND if ELEMENT is NULL, and ASN1_TAG_ERROR or ASN1_DER_ERROR if the der encoding doesn't match the structure name (* ELEMENT deleted).