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/* Copyright (c) 2017, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
// cavp_rsa2_sigver_test processes NIST CAVP RSA2 SigVer test vector request
// files and emits the corresponding response.
#include <vector>
#include <openssl/bn.h>
#include <openssl/crypto.h>
#include <openssl/digest.h>
#include <openssl/err.h>
#include <openssl/rsa.h>
#include "../crypto/internal.h"
#include "../crypto/test/file_test.h"
#include "cavp_test_util.h"
namespace {
struct TestCtx {
std::vector<uint8_t> N;
bool is_pss;
};
}
static bool TestRSA2SigVer(FileTest *t, void *arg) {
TestCtx *ctx = reinterpret_cast<TestCtx *>(arg);
std::string mod_str;
if (!t->GetInstruction(&mod_str, "mod")) {
return false;
}
printf("%s", t->CurrentTestToString().c_str());
if (t->HasAttribute("n")) {
printf("\r\n");
return t->GetBytes(&ctx->N, "n");
}
std::string hash;
std::vector<uint8_t> e_bytes, msg, sig;
if (!t->GetAttribute(&hash, "SHAAlg") ||
!t->GetBytes(&e_bytes, "e") ||
!t->GetBytes(&msg, "Msg") ||
!t->GetBytes(&sig, "S")) {
return false;
}
bssl::UniquePtr<RSA> key(RSA_new());
key->n = BN_new();
key->e = BN_new();
if (key == nullptr ||
!BN_bin2bn(ctx->N.data(), ctx->N.size(), key->n) ||
!BN_bin2bn(e_bytes.data(), e_bytes.size(), key->e)) {
return false;
}
const EVP_MD *md = EVP_get_digestbyname(hash.c_str());
uint8_t digest_buf[EVP_MAX_MD_SIZE];
unsigned digest_len;
if (md == NULL ||
!EVP_Digest(msg.data(), msg.size(), digest_buf, &digest_len, md, NULL)) {
return false;
}
int ok;
if (ctx->is_pss) {
ok = RSA_verify_pss_mgf1(key.get(), digest_buf, digest_len, md, md, -1,
sig.data(), sig.size());
} else {
ok = RSA_verify(EVP_MD_type(md), digest_buf, digest_len, sig.data(),
sig.size(), key.get());
}
if (ok) {
printf("Result = P\r\n\r\n");
} else {
char buf[256];
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
printf("Result = F (%s)\r\n\r\n", buf);
}
ERR_clear_error();
return true;
}
int cavp_rsa2_sigver_test_main(int argc, char **argv) {
if (argc != 3) {
fprintf(stderr, "usage: %s (pkcs15|pss) <test file>\n",
argv[0]);
return 1;
}
TestCtx ctx;
if (strcmp(argv[1], "pkcs15") == 0) {
ctx = {std::vector<uint8_t>(), false};
} else if (strcmp(argv[1], "pss") == 0) {
ctx = {std::vector<uint8_t>(), true};
} else {
fprintf(stderr, "Unknown test type: %s\n", argv[1]);
return 1;
}
FileTest::Options opts;
opts.path = argv[2];
opts.callback = TestRSA2SigVer;
opts.arg = &ctx;
opts.silent = true;
opts.comment_callback = EchoComment;
return FileTestMain(opts);
}
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