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Diffstat (limited to 'test/exptest.c')
| -rw-r--r-- | test/exptest.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/test/exptest.c b/test/exptest.c new file mode 100644 index 0000000000..2da8dc2ffe --- /dev/null +++ b/test/exptest.c @@ -0,0 +1,257 @@ +/* crypto/bn/exptest.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * 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 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 acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS 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 AUTHOR OR 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. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "../e_os.h" + +#include <openssl/bio.h> +#include <openssl/bn.h> +#include <openssl/rand.h> +#include <openssl/err.h> + +#define NUM_BITS (BN_BITS*2) + +static const char rnd_seed[] = + "string to make the random number generator think it has entropy"; + +/* + * test_exp_mod_zero tests that x**0 mod 1 == 0. It returns zero on success. + */ +static int test_exp_mod_zero() +{ + BIGNUM *a = NULL, *p = NULL, *m = NULL; + BIGNUM *r = NULL; + BN_CTX *ctx = BN_CTX_new(); + int ret = 1; + + m = BN_new(); + if (!m) + goto err; + BN_one(m); + + a = BN_new(); + if (!a) + goto err; + BN_one(a); + + p = BN_new(); + if (!p) + goto err; + BN_zero(p); + + r = BN_new(); + if (!r) + goto err; + BN_mod_exp(r, a, p, m, ctx); + BN_CTX_free(ctx); + + if (BN_is_zero(r)) + ret = 0; + else { + printf("1**0 mod 1 = "); + BN_print_fp(stdout, r); + printf(", should be 0\n"); + } + + err: + BN_free(r); + BN_free(a); + BN_free(p); + BN_free(m); + + return ret; +} + +int main(int argc, char *argv[]) +{ + BN_CTX *ctx; + BIO *out = NULL; + int i, ret; + unsigned char c; + BIGNUM *r_mont, *r_mont_const, *r_recp, *r_simple, *a, *b, *m; + + RAND_seed(rnd_seed, sizeof rnd_seed); /* or BN_rand may fail, and we + * don't even check its return + * value (which we should) */ + + ERR_load_BN_strings(); + + ctx = BN_CTX_new(); + if (ctx == NULL) + EXIT(1); + r_mont = BN_new(); + r_mont_const = BN_new(); + r_recp = BN_new(); + r_simple = BN_new(); + a = BN_new(); + b = BN_new(); + m = BN_new(); + if ((r_mont == NULL) || (r_recp == NULL) || (a == NULL) || (b == NULL)) + goto err; + + out = BIO_new(BIO_s_file()); + + if (out == NULL) + EXIT(1); + BIO_set_fp(out, stdout, BIO_NOCLOSE); + + for (i = 0; i < 200; i++) { + RAND_bytes(&c, 1); + c = (c % BN_BITS) - BN_BITS2; + BN_rand(a, NUM_BITS + c, 0, 0); + + RAND_bytes(&c, 1); + c = (c % BN_BITS) - BN_BITS2; + BN_rand(b, NUM_BITS + c, 0, 0); + + RAND_bytes(&c, 1); + c = (c % BN_BITS) - BN_BITS2; + BN_rand(m, NUM_BITS + c, 0, 1); + + BN_mod(a, a, m, ctx); + BN_mod(b, b, m, ctx); + + ret = BN_mod_exp_mont(r_mont, a, b, m, ctx, NULL); + if (ret <= 0) { + printf("BN_mod_exp_mont() problems\n"); + ERR_print_errors(out); + EXIT(1); + } + + ret = BN_mod_exp_recp(r_recp, a, b, m, ctx); + if (ret <= 0) { + printf("BN_mod_exp_recp() problems\n"); + ERR_print_errors(out); + EXIT(1); + } + + ret = BN_mod_exp_simple(r_simple, a, b, m, ctx); + if (ret <= 0) { + printf("BN_mod_exp_simple() problems\n"); + ERR_print_errors(out); + EXIT(1); + } + + ret = BN_mod_exp_mont_consttime(r_mont_const, a, b, m, ctx, NULL); + if (ret <= 0) { + printf("BN_mod_exp_mont_consttime() problems\n"); + ERR_print_errors(out); + EXIT(1); + } + + if (BN_cmp(r_simple, r_mont) == 0 + && BN_cmp(r_simple, r_recp) == 0 + && BN_cmp(r_simple, r_mont_const) == 0) { + printf("."); + fflush(stdout); + } else { + if (BN_cmp(r_simple, r_mont) != 0) + printf("\nsimple and mont results differ\n"); + if (BN_cmp(r_simple, r_mont_const) != 0) + printf("\nsimple and mont const time results differ\n"); + if (BN_cmp(r_simple, r_recp) != 0) + printf("\nsimple and recp results differ\n"); + + printf("a (%3d) = ", BN_num_bits(a)); + BN_print(out, a); + printf("\nb (%3d) = ", BN_num_bits(b)); + BN_print(out, b); + printf("\nm (%3d) = ", BN_num_bits(m)); + BN_print(out, m); + printf("\nsimple ="); + BN_print(out, r_simple); + printf("\nrecp ="); + BN_print(out, r_recp); + printf("\nmont ="); + BN_print(out, r_mont); + printf("\nmont_ct ="); + BN_print(out, r_mont_const); + printf("\n"); + EXIT(1); + } + } + BN_free(r_mont); + BN_free(r_mont_const); + BN_free(r_recp); + BN_free(r_simple); + BN_free(a); + BN_free(b); + BN_free(m); + BN_CTX_free(ctx); + ERR_remove_thread_state(NULL); + CRYPTO_mem_leaks(out); + BIO_free(out); + printf("\n"); + + if (test_exp_mod_zero() != 0) + goto err; + + printf("done\n"); + + EXIT(0); + err: + ERR_load_crypto_strings(); + ERR_print_errors(out); +#ifdef OPENSSL_SYS_NETWARE + printf("ERROR\n"); +#endif + EXIT(1); +} |