sc_asn1_find_tag 3 opensc sc_asn1_find_tag Find a tag in an ASN.1 stream #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); 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. 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.