X509_STORE_CTX_get1_issuer
LCRYPTO_USED(X509_STORE_CTX_get1_issuer);
LCRYPTO_ALIAS(X509_STORE_CTX_get1_issuer);
ctx->get_issuer = X509_STORE_CTX_get1_issuer;
int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x);
if (X509_STORE_CTX_get1_issuer(issuerp, csc, cert) != 1) {