| /* ==================================================================== |
| * 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 <openssl/bio.h> |
| #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> |
| |
| |
| int test_builtin(BIO *out) { |
| size_t n = 0; |
| EC_KEY *eckey = NULL, *wrong_eckey = NULL; |
| EC_GROUP *group; |
| ECDSA_SIG *ecdsa_sig = NULL; |
| unsigned char digest[20], wrong_digest[20]; |
| unsigned char *signature = NULL; |
| const unsigned char *sig_ptr; |
| unsigned char *sig_ptr2; |
| unsigned char *raw_buf = NULL; |
| unsigned int sig_len, degree, r_len, s_len, bn_len, buf_len; |
| int nid, ret = 0; |
| |
| /* fill digest values with some random data */ |
| if (!RAND_pseudo_bytes(digest, 20) || !RAND_pseudo_bytes(wrong_digest, 20)) { |
| BIO_printf(out, "ERROR: unable to get random data\n"); |
| goto builtin_err; |
| } |
| |
| /* create and verify a ecdsa signature with every availble curve |
| * (with ) */ |
| BIO_printf(out, |
| "\ntesting ECDSA_sign() and ECDSA_verify() " |
| "with some internal curves:\n"); |
| |
| static const int kCurveNIDs[] = {NID_secp224r1, NID_X9_62_prime256v1, |
| NID_secp384r1, NID_secp521r1, NID_undef}; |
| |
| /* now create and verify a signature for every curve */ |
| for (n = 0; kCurveNIDs[n] != NID_undef; n++) { |
| unsigned char dirt, offset; |
| |
| nid = kCurveNIDs[n]; |
| /* create new ecdsa key (== EC_KEY) */ |
| eckey = EC_KEY_new(); |
| if (eckey == NULL) { |
| goto builtin_err; |
| } |
| group = EC_GROUP_new_by_curve_name(nid); |
| if (group == NULL) { |
| goto builtin_err; |
| } |
| if (!EC_KEY_set_group(eckey, group)) { |
| goto builtin_err; |
| } |
| EC_GROUP_free(group); |
| degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey)); |
| if (degree < 160) { |
| /* Too small to test. */ |
| EC_KEY_free(eckey); |
| eckey = NULL; |
| continue; |
| } |
| |
| BIO_printf(out, "%s: ", OBJ_nid2sn(nid)); |
| /* create key */ |
| if (!EC_KEY_generate_key(eckey)) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| /* create second key */ |
| wrong_eckey = EC_KEY_new(); |
| if (wrong_eckey == NULL) { |
| goto builtin_err; |
| } |
| group = EC_GROUP_new_by_curve_name(nid); |
| if (group == NULL) { |
| goto builtin_err; |
| } |
| if (EC_KEY_set_group(wrong_eckey, group) == 0) { |
| goto builtin_err; |
| } |
| EC_GROUP_free(group); |
| if (!EC_KEY_generate_key(wrong_eckey)) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| |
| BIO_printf(out, "."); |
| (void)BIO_flush(out); |
| /* check key */ |
| if (!EC_KEY_check_key(eckey)) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| BIO_printf(out, "."); |
| (void)BIO_flush(out); |
| /* create signature */ |
| sig_len = ECDSA_size(eckey); |
| signature = OPENSSL_malloc(sig_len); |
| if (signature == NULL) { |
| goto builtin_err; |
| } |
| if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey)) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| BIO_printf(out, "."); |
| (void)BIO_flush(out); |
| /* verify signature */ |
| if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| BIO_printf(out, "."); |
| (void)BIO_flush(out); |
| /* verify signature with the wrong key */ |
| if (ECDSA_verify(0, digest, 20, signature, sig_len, wrong_eckey) == 1) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| BIO_printf(out, "."); |
| (void)BIO_flush(out); |
| /* wrong digest */ |
| if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len, eckey) == 1) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| BIO_printf(out, "."); |
| (void)BIO_flush(out); |
| /* wrong length */ |
| if (ECDSA_verify(0, digest, 20, signature, sig_len - 1, eckey) == 1) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| BIO_printf(out, "."); |
| (void)BIO_flush(out); |
| |
| /* 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. */ |
| sig_ptr = signature; |
| ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len); |
| if (ecdsa_sig == NULL) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| |
| /* Store the two BIGNUMs in raw_buf. */ |
| r_len = BN_num_bytes(ecdsa_sig->r); |
| s_len = BN_num_bytes(ecdsa_sig->s); |
| bn_len = (degree + 7) / 8; |
| if (r_len > bn_len || s_len > bn_len) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| buf_len = 2 * bn_len; |
| raw_buf = OPENSSL_malloc(buf_len); |
| if (raw_buf == NULL) { |
| goto builtin_err; |
| } |
| /* Pad the bignums with leading zeroes. */ |
| memset(raw_buf, 0, buf_len); |
| BN_bn2bin(ecdsa_sig->r, raw_buf + bn_len - r_len); |
| BN_bn2bin(ecdsa_sig->s, raw_buf + buf_len - s_len); |
| |
| /* Modify a single byte in the buffer. */ |
| offset = raw_buf[10] % buf_len; |
| dirt = raw_buf[11] ? raw_buf[11] : 1; |
| raw_buf[offset] ^= dirt; |
| /* Now read the BIGNUMs back in from raw_buf. */ |
| if (BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL || |
| BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL) { |
| goto builtin_err; |
| } |
| |
| sig_ptr2 = signature; |
| sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2); |
| if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| /* Sanity check: undo the modification and verify signature. */ |
| raw_buf[offset] ^= dirt; |
| if (BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL || |
| BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL) { |
| goto builtin_err; |
| } |
| |
| sig_ptr2 = signature; |
| sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2); |
| if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| BIO_printf(out, "."); |
| (void)BIO_flush(out); |
| |
| BIO_printf(out, " ok\n"); |
| /* cleanup */ |
| /* clean bogus errors */ |
| ERR_clear_error(); |
| OPENSSL_free(signature); |
| signature = NULL; |
| EC_KEY_free(eckey); |
| eckey = NULL; |
| EC_KEY_free(wrong_eckey); |
| wrong_eckey = NULL; |
| ECDSA_SIG_free(ecdsa_sig); |
| ecdsa_sig = NULL; |
| OPENSSL_free(raw_buf); |
| raw_buf = NULL; |
| } |
| |
| ret = 1; |
| builtin_err: |
| if (eckey) |
| EC_KEY_free(eckey); |
| if (wrong_eckey) |
| EC_KEY_free(wrong_eckey); |
| if (ecdsa_sig) |
| ECDSA_SIG_free(ecdsa_sig); |
| if (signature) |
| OPENSSL_free(signature); |
| if (raw_buf) |
| OPENSSL_free(raw_buf); |
| |
| return ret; |
| } |
| |
| int main(void) { |
| int ret = 1; |
| BIO *out; |
| |
| CRYPTO_library_init(); |
| ERR_load_crypto_strings(); |
| |
| out = BIO_new_fp(stdout, BIO_NOCLOSE); |
| |
| if (!test_builtin(out)) |
| goto err; |
| |
| ret = 0; |
| |
| err: |
| if (ret) |
| BIO_printf(out, "\nECDSA test failed\n"); |
| else |
| BIO_printf(out, "\nPASS\n"); |
| if (ret) |
| BIO_print_errors(out); |
| |
| if (out != NULL) |
| BIO_free(out); |
| |
| return ret; |
| } |