diff options
Diffstat (limited to 'crypto/ecdsa/ecdsatest.c')
| -rw-r--r-- | crypto/ecdsa/ecdsatest.c | 938 |
1 files changed, 461 insertions, 477 deletions
diff --git a/crypto/ecdsa/ecdsatest.c b/crypto/ecdsa/ecdsatest.c index 89b7c9f59c..d58490f21f 100644 --- a/crypto/ecdsa/ecdsatest.c +++ b/crypto/ecdsa/ecdsatest.c @@ -10,7 +10,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * 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 @@ -58,13 +58,13 @@ /* ==================================================================== * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. * - * Portions of the attached software ("Contribution") are developed by + * 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 + * The elliptic curve binary polynomial software is originally written by * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories. * */ @@ -76,26 +76,26 @@ #include <openssl/opensslconf.h> /* To see if OPENSSL_NO_ECDSA is defined */ #ifdef OPENSSL_NO_ECDSA -int main(int argc, char * argv[]) - { - puts("Elliptic curves are disabled."); - return 0; - } +int main(int argc, char *argv[]) +{ + puts("Elliptic curves are disabled."); + return 0; +} #else -#include <openssl/crypto.h> -#include <openssl/bio.h> -#include <openssl/evp.h> -#include <openssl/bn.h> -#include <openssl/ecdsa.h> -#ifndef OPENSSL_NO_ENGINE -#include <openssl/engine.h> -#endif -#include <openssl/err.h> -#include <openssl/rand.h> +# include <openssl/crypto.h> +# include <openssl/bio.h> +# include <openssl/evp.h> +# include <openssl/bn.h> +# include <openssl/ecdsa.h> +# ifndef OPENSSL_NO_ENGINE +# include <openssl/engine.h> +# endif +# include <openssl/err.h> +# include <openssl/rand.h> static const char rnd_seed[] = "string to make the random number generator " - "think it has entropy"; + "think it has entropy"; /* declaration of the test functions */ int x9_62_tests(BIO *); @@ -107,481 +107,465 @@ int change_rand(void); int restore_rand(void); int fbytes(unsigned char *buf, int num); -RAND_METHOD fake_rand; +RAND_METHOD fake_rand; const RAND_METHOD *old_rand; int change_rand(void) - { - /* save old rand method */ - if ((old_rand = RAND_get_rand_method()) == NULL) - return 0; - - fake_rand.seed = old_rand->seed; - fake_rand.cleanup = old_rand->cleanup; - fake_rand.add = old_rand->add; - fake_rand.status = old_rand->status; - /* use own random function */ - fake_rand.bytes = fbytes; - fake_rand.pseudorand = old_rand->bytes; - /* set new RAND_METHOD */ - if (!RAND_set_rand_method(&fake_rand)) - return 0; - return 1; - } +{ + /* save old rand method */ + if ((old_rand = RAND_get_rand_method()) == NULL) + return 0; + + fake_rand.seed = old_rand->seed; + fake_rand.cleanup = old_rand->cleanup; + fake_rand.add = old_rand->add; + fake_rand.status = old_rand->status; + /* use own random function */ + fake_rand.bytes = fbytes; + fake_rand.pseudorand = old_rand->bytes; + /* set new RAND_METHOD */ + if (!RAND_set_rand_method(&fake_rand)) + return 0; + return 1; +} int restore_rand(void) - { - if (!RAND_set_rand_method(old_rand)) - return 0; - else - return 1; - } +{ + if (!RAND_set_rand_method(old_rand)) + return 0; + else + return 1; +} static int fbytes_counter = 0, use_fake = 0; static const char *numbers[8] = { - "651056770906015076056810763456358567190100156695615665659", - "6140507067065001063065065565667405560006161556565665656654", - "8763001015071075675010661307616710783570106710677817767166" - "71676178726717", - "7000000175690566466555057817571571075705015757757057795755" - "55657156756655", - "1275552191113212300012030439187146164646146646466749494799", - "1542725565216523985789236956265265265235675811949404040041", - "1456427555219115346513212300075341203043918714616464614664" - "64667494947990", - "1712787255652165239672857892369562652652652356758119494040" - "40041670216363"}; + "651056770906015076056810763456358567190100156695615665659", + "6140507067065001063065065565667405560006161556565665656654", + "8763001015071075675010661307616710783570106710677817767166" + "71676178726717", + "7000000175690566466555057817571571075705015757757057795755" + "55657156756655", + "1275552191113212300012030439187146164646146646466749494799", + "1542725565216523985789236956265265265235675811949404040041", + "1456427555219115346513212300075341203043918714616464614664" + "64667494947990", + "1712787255652165239672857892369562652652652356758119494040" + "40041670216363" +}; int fbytes(unsigned char *buf, int num) - { - int ret; - BIGNUM *tmp = NULL; - - if (use_fake == 0) - return old_rand->bytes(buf, num); - - use_fake = 0; - - if (fbytes_counter >= 8) - return 0; - tmp = BN_new(); - if (!tmp) - return 0; - if (!BN_dec2bn(&tmp, numbers[fbytes_counter])) - { - BN_free(tmp); - return 0; - } - fbytes_counter ++; - if (num != BN_num_bytes(tmp) || !BN_bn2bin(tmp, buf)) - ret = 0; - else - ret = 1; - BN_free(tmp); - return ret; - } +{ + int ret; + BIGNUM *tmp = NULL; + + if (use_fake == 0) + return old_rand->bytes(buf, num); + + use_fake = 0; + + if (fbytes_counter >= 8) + return 0; + tmp = BN_new(); + if (!tmp) + return 0; + if (!BN_dec2bn(&tmp, numbers[fbytes_counter])) { + BN_free(tmp); + return 0; + } + fbytes_counter++; + if (num != BN_num_bytes(tmp) || !BN_bn2bin(tmp, buf)) + ret = 0; + else + ret = 1; + BN_free(tmp); + return ret; +} /* some tests from the X9.62 draft */ int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in) - { - int ret = 0; - const char message[] = "abc"; - unsigned char digest[20]; - unsigned int dgst_len = 0; - EVP_MD_CTX md_ctx; - EC_KEY *key = NULL; - ECDSA_SIG *signature = NULL; - BIGNUM *r = NULL, *s = NULL; - BIGNUM *kinv = NULL, *rp = NULL; - - EVP_MD_CTX_init(&md_ctx); - /* get the message digest */ - if (!EVP_DigestInit(&md_ctx, EVP_ecdsa()) - || !EVP_DigestUpdate(&md_ctx, (const void*)message, 3) - || !EVP_DigestFinal(&md_ctx, digest, &dgst_len)) - goto x962_int_err; - - BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid)); - /* create the key */ - if ((key = EC_KEY_new_by_curve_name(nid)) == NULL) - goto x962_int_err; - use_fake = 1; - if (!EC_KEY_generate_key(key)) - goto x962_int_err; - BIO_printf(out, "."); - (void)BIO_flush(out); - /* create the signature */ - use_fake = 1; - /* Use ECDSA_sign_setup to avoid use of ECDSA nonces */ - if (!ECDSA_sign_setup(key, NULL, &kinv, &rp)) - goto x962_int_err; - signature = ECDSA_do_sign_ex(digest, 20, kinv, rp, key); - if (signature == NULL) - goto x962_int_err; - BIO_printf(out, "."); - (void)BIO_flush(out); - /* compare the created signature with the expected signature */ - if ((r = BN_new()) == NULL || (s = BN_new()) == NULL) - goto x962_int_err; - if (!BN_dec2bn(&r, r_in) || - !BN_dec2bn(&s, s_in)) - goto x962_int_err; - if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s)) - goto x962_int_err; - BIO_printf(out, "."); - (void)BIO_flush(out); - /* verify the signature */ - if (ECDSA_do_verify(digest, 20, signature, key) != 1) - goto x962_int_err; - BIO_printf(out, "."); - (void)BIO_flush(out); - - BIO_printf(out, " ok\n"); - ret = 1; -x962_int_err: - if (!ret) - BIO_printf(out, " failed\n"); - if (key) - EC_KEY_free(key); - if (signature) - ECDSA_SIG_free(signature); - if (r) - BN_free(r); - if (s) - BN_free(s); - EVP_MD_CTX_cleanup(&md_ctx); - if (kinv) - BN_clear_free(kinv); - if (rp) - BN_clear_free(rp); - return ret; - } +{ + int ret = 0; + const char message[] = "abc"; + unsigned char digest[20]; + unsigned int dgst_len = 0; + EVP_MD_CTX md_ctx; + EC_KEY *key = NULL; + ECDSA_SIG *signature = NULL; + BIGNUM *r = NULL, *s = NULL; + BIGNUM *kinv = NULL, *rp = NULL; + + EVP_MD_CTX_init(&md_ctx); + /* get the message digest */ + if (!EVP_DigestInit(&md_ctx, EVP_ecdsa()) + || !EVP_DigestUpdate(&md_ctx, (const void *)message, 3) + || !EVP_DigestFinal(&md_ctx, digest, &dgst_len)) + goto x962_int_err; + + BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid)); + /* create the key */ + if ((key = EC_KEY_new_by_curve_name(nid)) == NULL) + goto x962_int_err; + use_fake = 1; + if (!EC_KEY_generate_key(key)) + goto x962_int_err; + BIO_printf(out, "."); + (void)BIO_flush(out); + /* create the signature */ + use_fake = 1; + /* Use ECDSA_sign_setup to avoid use of ECDSA nonces */ + if (!ECDSA_sign_setup(key, NULL, &kinv, &rp)) + goto x962_int_err; + signature = ECDSA_do_sign_ex(digest, 20, kinv, rp, key); + if (signature == NULL) + goto x962_int_err; + BIO_printf(out, "."); + (void)BIO_flush(out); + /* compare the created signature with the expected signature */ + if ((r = BN_new()) == NULL || (s = BN_new()) == NULL) + goto x962_int_err; + if (!BN_dec2bn(&r, r_in) || !BN_dec2bn(&s, s_in)) + goto x962_int_err; + if (BN_cmp(signature->r, r) || BN_cmp(signature->s, s)) + goto x962_int_err; + BIO_printf(out, "."); + (void)BIO_flush(out); + /* verify the signature */ + if (ECDSA_do_verify(digest, 20, signature, key) != 1) + goto x962_int_err; + BIO_printf(out, "."); + (void)BIO_flush(out); + + BIO_printf(out, " ok\n"); + ret = 1; + x962_int_err: + if (!ret) + BIO_printf(out, " failed\n"); + if (key) + EC_KEY_free(key); + if (signature) + ECDSA_SIG_free(signature); + if (r) + BN_free(r); + if (s) + BN_free(s); + EVP_MD_CTX_cleanup(&md_ctx); + if (kinv) + BN_clear_free(kinv); + if (rp) + BN_clear_free(rp); + return ret; +} int x9_62_tests(BIO *out) - { - int ret = 0; - - BIO_printf(out, "some tests from X9.62:\n"); - - /* set own rand method */ - if (!change_rand()) - goto x962_err; - - if (!x9_62_test_internal(out, NID_X9_62_prime192v1, - "3342403536405981729393488334694600415596881826869351677613", - "5735822328888155254683894997897571951568553642892029982342")) - goto x962_err; - if (!x9_62_test_internal(out, NID_X9_62_prime239v1, - "3086361431751678114926225473006680188549593787585317781474" - "62058306432176", - "3238135532097973577080787768312505059318910517550078427819" - "78505179448783")) - goto x962_err; -#ifndef OPENSSL_NO_EC2M - if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1, - "87194383164871543355722284926904419997237591535066528048", - "308992691965804947361541664549085895292153777025772063598")) - goto x962_err; - if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1, - "2159633321041961198501834003903461262881815148684178964245" - "5876922391552", - "1970303740007316867383349976549972270528498040721988191026" - "49413465737174")) - goto x962_err; -#endif - ret = 1; -x962_err: - if (!restore_rand()) - ret = 0; - return ret; - } +{ + int ret = 0; + + BIO_printf(out, "some tests from X9.62:\n"); + + /* set own rand method */ + if (!change_rand()) + goto x962_err; + + if (!x9_62_test_internal(out, NID_X9_62_prime192v1, + "3342403536405981729393488334694600415596881826869351677613", + "5735822328888155254683894997897571951568553642892029982342")) + goto x962_err; + if (!x9_62_test_internal(out, NID_X9_62_prime239v1, + "3086361431751678114926225473006680188549593787585317781474" + "62058306432176", + "3238135532097973577080787768312505059318910517550078427819" + "78505179448783")) + goto x962_err; +# ifndef OPENSSL_NO_EC2M + if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1, + "87194383164871543355722284926904419997237591535066528048", + "308992691965804947361541664549085895292153777025772063598")) + goto x962_err; + if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1, + "2159633321041961198501834003903461262881815148684178964245" + "5876922391552", + "1970303740007316867383349976549972270528498040721988191026" + "49413465737174")) + goto x962_err; +# endif + ret = 1; + x962_err: + if (!restore_rand()) + ret = 0; + return ret; +} int test_builtin(BIO *out) - { - EC_builtin_curve *curves = NULL; - size_t crv_len = 0, 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"); - - /* get a list of all internal curves */ - crv_len = EC_get_builtin_curves(NULL, 0); - - curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len); - - if (curves == NULL) - { - BIO_printf(out, "malloc error\n"); - goto builtin_err; - } - - if (!EC_get_builtin_curves(curves, crv_len)) - { - BIO_printf(out, "unable to get internal curves\n"); - goto builtin_err; - } - - /* now create and verify a signature for every curve */ - for (n = 0; n < crv_len; n++) - { - unsigned char dirt, offset; - - nid = curves[n].nid; - if (nid == NID_ipsec4) - continue; - /* create new ecdsa key (== EC_KEY) */ - if ((eckey = EC_KEY_new()) == 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) == 0) - goto builtin_err; - EC_GROUP_free(group); - degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey)); - if (degree < 160) - /* drop the curve */ - { - 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 */ - if ((wrong_eckey = EC_KEY_new()) == 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); - if ((signature = OPENSSL_malloc(sig_len)) == 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; - if ((ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len)) == 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; - if ((raw_buf = OPENSSL_malloc(buf_len)) == 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); - if (curves) - OPENSSL_free(curves); - - return ret; - } +{ + EC_builtin_curve *curves = NULL; + size_t crv_len = 0, 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"); + + /* get a list of all internal curves */ + crv_len = EC_get_builtin_curves(NULL, 0); + + curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len); + + if (curves == NULL) { + BIO_printf(out, "malloc error\n"); + goto builtin_err; + } + + if (!EC_get_builtin_curves(curves, crv_len)) { + BIO_printf(out, "unable to get internal curves\n"); + goto builtin_err; + } + + /* now create and verify a signature for every curve */ + for (n = 0; n < crv_len; n++) { + unsigned char dirt, offset; + + nid = curves[n].nid; + if (nid == NID_ipsec4) + continue; + /* create new ecdsa key (== EC_KEY) */ + if ((eckey = EC_KEY_new()) == 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) == 0) + goto builtin_err; + EC_GROUP_free(group); + degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey)); + if (degree < 160) + /* drop the curve */ + { + 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 */ + if ((wrong_eckey = EC_KEY_new()) == 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); + if ((signature = OPENSSL_malloc(sig_len)) == 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; + if ((ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len)) == 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; + if ((raw_buf = OPENSSL_malloc(buf_len)) == 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); + if (curves) + OPENSSL_free(curves); + + return ret; +} int main(void) - { - int ret = 1; - BIO *out; - - out = BIO_new_fp(stdout, BIO_NOCLOSE); - - /* enable memory leak checking unless explicitly disabled */ - if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) && - (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off")))) - { - CRYPTO_malloc_debug_init(); - CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL); - } - else - { - /* OPENSSL_DEBUG_MEMORY=off */ - CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0); - } - CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON); - - ERR_load_crypto_strings(); - - /* initialize the prng */ - RAND_seed(rnd_seed, sizeof(rnd_seed)); - - /* the tests */ - if (!x9_62_tests(out)) goto err; - if (!test_builtin(out)) goto err; - - ret = 0; -err: - if (ret) - BIO_printf(out, "\nECDSA test failed\n"); - else - BIO_printf(out, "\nECDSA test passed\n"); - if (ret) - ERR_print_errors(out); - CRYPTO_cleanup_all_ex_data(); - ERR_remove_thread_state(NULL); - ERR_free_strings(); - CRYPTO_mem_leaks(out); - if (out != NULL) - BIO_free(out); - return ret; - } +{ + int ret = 1; + BIO *out; + + out = BIO_new_fp(stdout, BIO_NOCLOSE); + + /* enable memory leak checking unless explicitly disabled */ + if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) && + (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off")))) { + CRYPTO_malloc_debug_init(); + CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL); + } else { + /* OPENSSL_DEBUG_MEMORY=off */ + CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0); + } + CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON); + + ERR_load_crypto_strings(); + + /* initialize the prng */ + RAND_seed(rnd_seed, sizeof(rnd_seed)); + + /* the tests */ + if (!x9_62_tests(out)) + goto err; + if (!test_builtin(out)) + goto err; + + ret = 0; + err: + if (ret) + BIO_printf(out, "\nECDSA test failed\n"); + else + BIO_printf(out, "\nECDSA test passed\n"); + if (ret) + ERR_print_errors(out); + CRYPTO_cleanup_all_ex_data(); + ERR_remove_thread_state(NULL); + ERR_free_strings(); + CRYPTO_mem_leaks(out); + if (out != NULL) + BIO_free(out); + return ret; +} #endif |