diff options
Diffstat (limited to 'src/crypto/ecdsa/ecdsa_test.c')
| -rw-r--r-- | src/crypto/ecdsa/ecdsa_test.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/src/crypto/ecdsa/ecdsa_test.c b/src/crypto/ecdsa/ecdsa_test.c new file mode 100644 index 0000000..d48f9c3 --- /dev/null +++ b/src/crypto/ecdsa/ecdsa_test.c @@ -0,0 +1,328 @@ +/* ==================================================================== + * 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; + BIGNUM *order = NULL; + 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, r_len, s_len, bn_len, buf_len; + int nid, ret = 0; + + /* fill digest values with some random data */ + if (!RAND_bytes(digest, 20) || !RAND_bytes(wrong_digest, 20)) { + BIO_printf(out, "ERROR: unable to get random data\n"); + goto builtin_err; + } + + order = BN_new(); + if (order == NULL) { + 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); + if (!EC_GROUP_get_order(EC_KEY_get0_group(eckey), order, NULL)) { + goto builtin_err; + } + if (BN_num_bits(order) < 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 = BN_num_bytes(order); + 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(2 * bn_len); + if (raw_buf == NULL) { + goto builtin_err; + } + /* Pad the bignums with leading zeroes. */ + if (!BN_bn2bin_padded(raw_buf, bn_len, ecdsa_sig->r) || + !BN_bn2bin_padded(raw_buf + bn_len, bn_len, ecdsa_sig->s)) { + goto builtin_err; + } + + /* 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 (order) { + BN_free(order); + } + 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; +} |