TS_RESP_verify_signature
LCRYPTO_USED(TS_RESP_verify_signature);
int TS_RESP_verify_signature(PKCS7 *token, STACK_OF(X509) *certs,
LCRYPTO_ALIAS(TS_RESP_verify_signature);
!TS_RESP_verify_signature(token, ctx->certs, ctx->store, &signer))