ASN1_STRING_get0_data
snprintf(genstr, sizeof(genstr), "%.14sZ", ASN1_STRING_get0_data(gen));
p = ASN1_STRING_get0_data(pubkey);
const unsigned char *ASN1_STRING_get0_data(const ASN1_STRING *x);
ns = (const char *)ASN1_STRING_get0_data(name->d.ia5);