NAME
sc_asn1_find_tag - Find a tag in an ASN.1 stream
SYNOPSIS
#include <opensc.h>
const unsigned char *sc_asn1_find_tag(struct sc_context *ctx,
const unsigned char *buf, size_t buflen,
unsigned int tag_in, size_t *taglen_in);
DESCRIPTION
This function tries to find an ASN.1 tag matching tag_in in the buffer
pointed to by buf, which is of size buflen. The buffer should contain a
series of ASN.1 entries.
RETURN VALUE
If the specified tag was not found, NULL is returned. If found, the
address where it was found is returned, and taglen_in is set to the
length of the found tag.