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author | Adam Langley <agl@google.com> | 2015-05-11 17:20:37 -0700 |
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committer | Kenny Root <kroot@google.com> | 2015-05-12 23:06:14 +0000 |
commit | e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5 (patch) | |
tree | 6e43e34595ecf887c26c32b86d8ab097fe8cac64 /src/crypto/ecdsa/ecdsa_test.cc | |
parent | b3106a0cc1493bbe0505c0ec0ce3da4ca90a29ae (diff) | |
download | external_boringssl-e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5.zip external_boringssl-e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5.tar.gz external_boringssl-e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5.tar.bz2 |
external/boringssl: bump revision.
This change bumps the BoringSSL revision to the current tip-of-tree.
Change-Id: I91d5bf467e16e8d86cb19a4de873985f524e5faa
Diffstat (limited to 'src/crypto/ecdsa/ecdsa_test.cc')
-rw-r--r-- | src/crypto/ecdsa/ecdsa_test.cc | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/src/crypto/ecdsa/ecdsa_test.cc b/src/crypto/ecdsa/ecdsa_test.cc new file mode 100644 index 0000000..a6bd7a1 --- /dev/null +++ b/src/crypto/ecdsa/ecdsa_test.cc @@ -0,0 +1,340 @@ +/* ==================================================================== + * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). */ + +#include <openssl/ecdsa.h> + +#include <vector> + +#include <openssl/bn.h> +#include <openssl/crypto.h> +#include <openssl/ec.h> +#include <openssl/err.h> +#include <openssl/mem.h> +#include <openssl/obj.h> +#include <openssl/rand.h> + +#include "../test/scoped_types.h" +#include "../test/stl_compat.h" + +enum Api { + kEncodedApi, + kRawApi, +}; + +// VerifyECDSASig returns true on success, false on failure. +static bool VerifyECDSASig(Api api, const uint8_t *digest, + size_t digest_len, const ECDSA_SIG *ecdsa_sig, + EC_KEY *eckey, int expected_result) { + int actual_result; + + switch (api) { + case kEncodedApi: { + int sig_len = i2d_ECDSA_SIG(ecdsa_sig, NULL); + if (sig_len <= 0) { + return false; + } + std::vector<uint8_t> signature(static_cast<size_t>(sig_len)); + uint8_t *sig_ptr = bssl::vector_data(&signature); + sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr); + if (sig_len <= 0) { + return false; + } + actual_result = ECDSA_verify(0, digest, digest_len, bssl::vector_data(&signature), + signature.size(), eckey); + break; + } + + case kRawApi: + actual_result = ECDSA_do_verify(digest, digest_len, ecdsa_sig, eckey); + break; + + default: + return false; + } + return expected_result == actual_result; +} + +// TestTamperedSig verifies that signature verification fails when a valid +// signature is tampered with. |ecdsa_sig| must be a valid signature, which will +// be modified. TestTamperedSig returns true on success, false on failure. +static bool TestTamperedSig(FILE *out, Api api, const uint8_t *digest, + size_t digest_len, ECDSA_SIG *ecdsa_sig, + EC_KEY *eckey, const BIGNUM *order) { + // Modify a single byte of the signature: to ensure we don't + // garble the ASN1 structure, we read the raw signature and + // modify a byte in one of the bignums directly. + + // Store the two BIGNUMs in raw_buf. + size_t r_len = BN_num_bytes(ecdsa_sig->r); + size_t s_len = BN_num_bytes(ecdsa_sig->s); + size_t bn_len = BN_num_bytes(order); + if (r_len > bn_len || s_len > bn_len) { + return false; + } + size_t buf_len = 2 * bn_len; + std::vector<uint8_t> raw_buf(buf_len); + // Pad the bignums with leading zeroes. + if (!BN_bn2bin_padded(bssl::vector_data(&raw_buf), bn_len, ecdsa_sig->r) || + !BN_bn2bin_padded(bssl::vector_data(&raw_buf) + bn_len, bn_len, + ecdsa_sig->s)) { + return false; + } + + // Modify a single byte in the buffer. + size_t offset = raw_buf[10] % buf_len; + uint8_t dirt = raw_buf[11] ? raw_buf[11] : 1; + raw_buf[offset] ^= dirt; + // Now read the BIGNUMs back in from raw_buf. + if (BN_bin2bn(bssl::vector_data(&raw_buf), bn_len, ecdsa_sig->r) == NULL || + BN_bin2bn(bssl::vector_data(&raw_buf) + bn_len, bn_len, + ecdsa_sig->s) == NULL || + !VerifyECDSASig(api, digest, digest_len, ecdsa_sig, eckey, 0)) { + return false; + } + + // Sanity check: Undo the modification and verify signature. + raw_buf[offset] ^= dirt; + if (BN_bin2bn(bssl::vector_data(&raw_buf), bn_len, ecdsa_sig->r) == NULL || + BN_bin2bn(bssl::vector_data(&raw_buf) + bn_len, bn_len, + ecdsa_sig->s) == NULL || + !VerifyECDSASig(api, digest, digest_len, ecdsa_sig, eckey, 1)) { + return false; + } + + return true; +} + +static bool TestBuiltin(FILE *out) { + // Fill digest values with some random data. + uint8_t digest[20], wrong_digest[20]; + if (!RAND_bytes(digest, 20) || !RAND_bytes(wrong_digest, 20)) { + fprintf(out, "ERROR: unable to get random data\n"); + return false; + } + + static const struct { + int nid; + const char *name; + } kCurves[] = { + { NID_secp224r1, "secp224r1" }, + { NID_X9_62_prime256v1, "secp256r1" }, + { NID_secp384r1, "secp384r1" }, + { NID_secp521r1, "secp521r1" }, + { NID_undef, NULL } + }; + + // Create and verify ECDSA signatures with every available curve. + fputs("\ntesting ECDSA_sign(), ECDSA_verify(), ECDSA_do_sign(), and " + "ECDSA_do_verify() with some internal curves:\n", out); + + for (size_t n = 0; kCurves[n].nid != NID_undef; n++) { + fprintf(out, "%s: ", kCurves[n].name); + + int nid = kCurves[n].nid; + ScopedEC_GROUP group(EC_GROUP_new_by_curve_name(nid)); + if (!group) { + fprintf(out, " failed\n"); + return false; + } + ScopedBIGNUM order(BN_new()); + if (!order || !EC_GROUP_get_order(group.get(), order.get(), NULL)) { + fprintf(out, " failed\n"); + return false; + } + if (BN_num_bits(order.get()) < 160) { + // Too small to test. + fprintf(out, " skipped\n"); + continue; + } + + // Create a new ECDSA key. + ScopedEC_KEY eckey(EC_KEY_new()); + if (!eckey || !EC_KEY_set_group(eckey.get(), group.get()) || + !EC_KEY_generate_key(eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + // Create a second key. + ScopedEC_KEY wrong_eckey(EC_KEY_new()); + if (!wrong_eckey || !EC_KEY_set_group(wrong_eckey.get(), group.get()) || + !EC_KEY_generate_key(wrong_eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + + fprintf(out, "."); + fflush(out); + + // Check the key. + if (!EC_KEY_check_key(eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + + // Test ASN.1-encoded signatures. + // Create a signature. + unsigned sig_len = ECDSA_size(eckey.get()); + std::vector<uint8_t> signature(sig_len); + if (!ECDSA_sign(0, digest, 20, bssl::vector_data(&signature), &sig_len, + eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + signature.resize(sig_len); + fprintf(out, "."); + fflush(out); + // Verify the signature. + if (!ECDSA_verify(0, digest, 20, bssl::vector_data(&signature), + signature.size(), eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + // Verify the signature with the wrong key. + if (ECDSA_verify(0, digest, 20, bssl::vector_data(&signature), + signature.size(), wrong_eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + // Verify the signature using the wrong digest. + if (ECDSA_verify(0, wrong_digest, 20, bssl::vector_data(&signature), + signature.size(), eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + // Verify a truncated signature. + if (ECDSA_verify(0, digest, 20, bssl::vector_data(&signature), + signature.size() - 1, eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + // Verify a tampered signature. + const uint8_t *sig_ptr = bssl::vector_data(&signature); + ScopedECDSA_SIG ecdsa_sig(d2i_ECDSA_SIG(NULL, &sig_ptr, signature.size())); + if (!ecdsa_sig || + !TestTamperedSig(out, kEncodedApi, digest, 20, ecdsa_sig.get(), + eckey.get(), order.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + + // Test ECDSA_SIG signing and verification. + // Create a signature. + ecdsa_sig.reset(ECDSA_do_sign(digest, 20, eckey.get())); + if (!ecdsa_sig) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + // Verify the signature using the correct key. + if (!ECDSA_do_verify(digest, 20, ecdsa_sig.get(), eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + // Verify the signature with the wrong key. + if (ECDSA_do_verify(digest, 20, ecdsa_sig.get(), wrong_eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + // Verify the signature using the wrong digest. + if (ECDSA_do_verify(wrong_digest, 20, ecdsa_sig.get(), eckey.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + // Verify a tampered signature. + if (!TestTamperedSig(out, kRawApi, digest, 20, ecdsa_sig.get(), eckey.get(), + order.get())) { + fprintf(out, " failed\n"); + return false; + } + fprintf(out, "."); + fflush(out); + + fprintf(out, " ok\n"); + // Clear bogus errors. + ERR_clear_error(); + } + + return true; +} + +int main(void) { + CRYPTO_library_init(); + ERR_load_crypto_strings(); + + if (!TestBuiltin(stdout)) { + printf("\nECDSA test failed\n"); + ERR_print_errors_fp(stdout); + return 1; + } + + printf("\nPASS\n"); + return 0; +} |