apps/cmp.c: Check self-signature on CSR input and warn on failure
@@ -673,6 +673,14 @@ static X509_REQ *load_csr_autofmt(const char *infile, const char *desc)
ERR_print_errors(bio_err);
BIO_printf(bio_err, "error: unable to load %s from file '%s'\n", desc,
infile);
+ } else {
+ EVP_PKEY *pkey = X509_REQ_get0_pubkey(csr);
+ int ret = do_X509_REQ_verify(csr, pkey, NULL /* vfyopts */);
+
+ if (pkey == NULL || ret < 0)
+ CMP_warn("error while verifying CSR self-signature");
+ else if (ret == 0)
+ CMP_warn("CSR self-signature does not match the contents");
}
return csr;
}
