--- /dev/null
+/*
+ * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/* ====================================================================
+ * 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 <stdlib.h>
+#include <string.h>
+
+#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_EC is defined */
+
+#ifdef OPENSSL_NO_EC
+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/ec.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";
+
+/* declaration of the test functions */
+int x9_62_tests(BIO *);
+int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s);
+int test_builtin(BIO *);
+
+/* functions to change the RAND_METHOD */
+int change_rand(void);
+int restore_rand(void);
+int fbytes(unsigned char *buf, int num);
+
+static RAND_METHOD fake_rand;
+static 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;
+}
+
+int restore_rand(void)
+{
+ 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"
+};
+
+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;
+}
+
+/* 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 = EVP_MD_CTX_new();
+ EC_KEY *key = NULL;
+ ECDSA_SIG *signature = NULL;
+ BIGNUM *r = NULL, *s = NULL;
+ BIGNUM *kinv = NULL, *rp = NULL;
+ const BIGNUM *sig_r, *sig_s;
+
+ if (md_ctx == NULL)
+ goto x962_int_err;
+
+ /* get the message digest */
+ if (!EVP_DigestInit(md_ctx, EVP_sha1())
+ || !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;
+ ECDSA_SIG_get0(signature, &sig_r, &sig_s);
+ if (BN_cmp(sig_r, r) || BN_cmp(sig_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");
+ EC_KEY_free(key);
+ ECDSA_SIG_free(signature);
+ BN_free(r);
+ BN_free(s);
+ EVP_MD_CTX_free(md_ctx);
+ BN_clear_free(kinv);
+ 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 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, *modified_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;
+ const BIGNUM *sig_r, *sig_s;
+ BIGNUM *modified_r = NULL, *modified_s = NULL;
+ BIGNUM *unmodified_r = NULL, *unmodified_s = 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_bytes(digest, 20) <= 0 || RAND_bytes(wrong_digest, 20) <= 0) {
+ BIO_printf(out, "ERROR: unable to get random data\n");
+ goto builtin_err;
+ }
+
+ /*
+ * create and verify a ecdsa signature with every available 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(*curves) * 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 || nid == NID_X25519)
+ 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;
+ }
+
+ ECDSA_SIG_get0(ecdsa_sig, &sig_r, &sig_s);
+
+ /* Store the two BIGNUMs in raw_buf. */
+ r_len = BN_num_bytes(sig_r);
+ s_len = BN_num_bytes(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_zalloc(buf_len)) == NULL)
+ goto builtin_err;
+ BN_bn2bin(sig_r, raw_buf + bn_len - r_len);
+ BN_bn2bin(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. */
+ modified_sig = ECDSA_SIG_new();
+ if (modified_sig == NULL)
+ goto builtin_err;
+ if (((modified_r = BN_bin2bn(raw_buf, bn_len, NULL)) == NULL)
+ || ((modified_s = BN_bin2bn(raw_buf + bn_len, bn_len, NULL)) == NULL)
+ || !ECDSA_SIG_set0(modified_sig, modified_r, modified_s)) {
+ BN_free(modified_r);
+ BN_free(modified_s);
+ goto builtin_err;
+ }
+ sig_ptr2 = signature;
+ sig_len = i2d_ECDSA_SIG(modified_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 (((unmodified_r = BN_bin2bn(raw_buf, bn_len, NULL)) == NULL)
+ || ((unmodified_s = BN_bin2bn(raw_buf + bn_len, bn_len, NULL)) == NULL)
+ || !ECDSA_SIG_set0(modified_sig, unmodified_r, unmodified_s)) {
+ BN_free(unmodified_r);
+ BN_free(unmodified_s);
+ goto builtin_err;
+ }
+
+ sig_ptr2 = signature;
+ sig_len = i2d_ECDSA_SIG(modified_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;
+ ECDSA_SIG_free(modified_sig);
+ modified_sig = NULL;
+ OPENSSL_free(raw_buf);
+ raw_buf = NULL;
+ }
+
+ ret = 1;
+ builtin_err:
+ EC_KEY_free(eckey);
+ EC_KEY_free(wrong_eckey);
+ ECDSA_SIG_free(ecdsa_sig);
+ ECDSA_SIG_free(modified_sig);
+ OPENSSL_free(signature);
+ OPENSSL_free(raw_buf);
+ OPENSSL_free(curves);
+
+ return ret;
+}
+
+int main(void)
+{
+ int ret = 1;
+ BIO *out;
+ char *p;
+
+ out = BIO_new_fp(stdout, BIO_NOCLOSE | BIO_FP_TEXT);
+
+ p = getenv("OPENSSL_DEBUG_MEMORY");
+ if (p != NULL && strcmp(p, "on") == 0)
+ CRYPTO_set_mem_debug(1);
+
+ /* 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);
+
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+ if (CRYPTO_mem_leaks(out) <= 0)
+ ret = 1;
+#endif
+ BIO_free(out);
+ return ret;
+}
+#endif
projects / cassiopeia.git / blobdiff