X509_get0_pubkey_bitstr
LCRYPTO_USED(X509_get0_pubkey_bitstr);
if ((ikey = X509_get0_pubkey_bitstr(issuer)) == NULL)
ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x);
LCRYPTO_ALIAS(X509_get0_pubkey_bitstr);
key = X509_get0_pubkey_bitstr(data);
ikey = X509_get0_pubkey_bitstr(issuer);