PKCS7_signatureVerify
LCRYPTO_USED(PKCS7_signatureVerify);
LCRYPTO_ALIAS(PKCS7_signatureVerify);
return PKCS7_signatureVerify(bio, p7, si, x509);
j = PKCS7_signatureVerify(p7bio, p7, si, signer);
int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
j = PKCS7_signatureVerify(p7bio, token, si, signer);