diff options
author | Adam Langley <agl@chromium.org> | 2014-06-20 23:00:00 +0400 |
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committer | Adam Langley <agl@chromium.org> | 2014-06-21 00:17:32 +0400 |
commit | 95c29f3cd1f6c08c6c0927868683392eea727ccb (patch) | |
tree | 012767320ced9abca61472a4daa4c4a56b7ebe2b /crypto/ec/example_mul.c |
Inital import.
Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta).
(This change contains substantial changes from the original and
effectively starts a new history.)
Diffstat (limited to 'crypto/ec/example_mul.c')
-rw-r--r-- | crypto/ec/example_mul.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/crypto/ec/example_mul.c b/crypto/ec/example_mul.c new file mode 100644 index 00000000..1e83d619 --- /dev/null +++ b/crypto/ec/example_mul.c @@ -0,0 +1,130 @@ +/* Originally written by Bodo Moeller for the OpenSSL project. + * ==================================================================== + * 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). + * + */ +/* ==================================================================== + * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. + * + * Portions of the attached software ("Contribution") are developed by + * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. + * + * The Contribution is licensed pursuant to the OpenSSL open source + * license provided above. + * + * The elliptic curve binary polynomial software is originally written by + * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems + * Laboratories. */ + +#include <stdio.h> + +#include <openssl/bn.h> +#include <openssl/ec.h> +#include <openssl/obj.h> + + +int example_EC_POINT_mul() { + /* This example ensures that 10×∞ + G = G, in P-256. */ + EC_GROUP *group = NULL; + EC_POINT *p = NULL, *result = NULL; + BIGNUM *n = NULL; + int ret = 0; + const EC_POINT *generator; + + group = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1); + p = EC_POINT_new(group); + result = EC_POINT_new(group); + n = BN_new(); + + if (p == NULL || + result == NULL || + group == NULL || + n == NULL || + !EC_POINT_set_to_infinity(group, p) || + !BN_set_word(n, 10)) { + goto err; + } + + /* First check that 10×∞ = ∞. */ + if (!EC_POINT_mul(group, result, NULL, p, n, NULL) || + !EC_POINT_is_at_infinity(group, result)) { + goto err; + } + + generator = EC_GROUP_get0_generator(group); + + /* Now check that 10×∞ + G = G. */ + if (!EC_POINT_mul(group, result, BN_value_one(), p, n, NULL) || + EC_POINT_cmp(group, result, generator, NULL) != 0) { + goto err; + } + + ret = 1; + +err: + BN_free(n); + EC_POINT_free(result); + EC_POINT_free(p); + EC_GROUP_free(group); + + return ret; +} + +int main() { + if (!example_EC_POINT_mul()) { + fprintf(stderr, "failed\n"); + return 1; + } + + printf("PASS\n"); + return 0; +} |