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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_siggen_test processes NIST CAVP RSA2 SigGen 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/rsa.h>
-
- #include "../crypto/internal.h"
- #include "../crypto/test/file_test.h"
- #include "cavp_test_util.h"
-
- namespace {
-
- struct TestCtx {
- bssl::UniquePtr<RSA> key;
- bool is_pss;
- };
-
- }
-
- static bool TestRSA2SigGen(FileTest *t, void *arg) {
- TestCtx *ctx = reinterpret_cast<TestCtx *>(arg);
-
- std::string mod_str, hash;
- std::vector<uint8_t> msg;
- if (!t->GetInstruction(&mod_str, "mod") ||
- !t->GetAttribute(&hash, "SHAAlg") ||
- !t->GetBytes(&msg, "Msg")) {
- return false;
- }
-
- std::string test = t->CurrentTestToString();
- if (t->IsAtNewInstructionBlock()) {
- int mod_bits = strtoul(mod_str.c_str(), nullptr, 0);
- ctx->key = bssl::UniquePtr<RSA>(RSA_new());
- if (ctx->key == nullptr ||
- mod_bits == 0 ||
- !RSA_generate_key_fips(ctx->key.get(), mod_bits, nullptr)) {
- return false;
- }
-
- const BIGNUM *n, *e;
- RSA_get0_key(ctx->key.get(), &n, &e, nullptr);
-
- std::vector<uint8_t> n_bytes(BN_num_bytes(n));
- std::vector<uint8_t> e_bytes(BN_num_bytes(e));
- if (!BN_bn2bin_padded(n_bytes.data(), n_bytes.size(), n) ||
- !BN_bn2bin_padded(e_bytes.data(), e_bytes.size(), e)) {
- return false;
- }
-
- printf("[mod = %s]\r\n\r\nn = %s\r\n\r\ne = %s",
- mod_str.c_str(),
- EncodeHex(n_bytes.data(), n_bytes.size()).c_str(),
- EncodeHex(e_bytes.data(), e_bytes.size()).c_str());
- test = test.substr(test.find("]") + 3);
- }
-
- const EVP_MD *md = EVP_get_digestbyname(hash.c_str());
- uint8_t digest_buf[EVP_MAX_MD_SIZE];
- std::vector<uint8_t> sig(RSA_size(ctx->key.get()));
- unsigned digest_len;
- size_t sig_len;
- if (md == NULL ||
- !EVP_Digest(msg.data(), msg.size(), digest_buf, &digest_len, md, NULL)) {
- return false;
- }
-
- if (ctx->is_pss) {
- if (!RSA_sign_pss_mgf1(ctx->key.get(), &sig_len, sig.data(), sig.size(),
- digest_buf, digest_len, md, md, -1)) {
- return false;
- }
- } else {
- unsigned sig_len_u;
- if (!RSA_sign(EVP_MD_type(md), digest_buf, digest_len, sig.data(),
- &sig_len_u, ctx->key.get())) {
- return false;
- }
- sig_len = sig_len_u;
- }
-
- printf("%sS = %s\r\n\r\n", test.c_str(),
- EncodeHex(sig.data(), sig_len).c_str());
- return true;
- }
-
- int cavp_rsa2_siggen_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 = {nullptr, false};
- } else if (strcmp(argv[1], "pss") == 0) {
- ctx = {nullptr, true};
- } else {
- fprintf(stderr, "Unknown test type: %s\n", argv[1]);
- return 1;
- }
-
- FileTest::Options opts;
- opts.path = argv[2];
- opts.callback = TestRSA2SigGen;
- opts.arg = &ctx;
- opts.silent = true;
- opts.comment_callback = EchoComment;
- return FileTestMain(opts);
- }
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