|
- /* Copyright (c) 2014, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
- #include <stdio.h>
- #include <string.h>
-
- #include <vector>
-
- #include <openssl/crypto.h>
- #include <openssl/ec_key.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
-
- #include "../test/scoped_types.h"
-
-
- // kECKeyWithoutPublic is an ECPrivateKey with the optional publicKey field
- // omitted.
- static const uint8_t kECKeyWithoutPublic[] = {
- 0x30, 0x31, 0x02, 0x01, 0x01, 0x04, 0x20, 0xc6, 0xc1, 0xaa, 0xda, 0x15, 0xb0,
- 0x76, 0x61, 0xf8, 0x14, 0x2c, 0x6c, 0xaf, 0x0f, 0xdb, 0x24, 0x1a, 0xff, 0x2e,
- 0xfe, 0x46, 0xc0, 0x93, 0x8b, 0x74, 0xf2, 0xbc, 0xc5, 0x30, 0x52, 0xb0, 0x77,
- 0xa0, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07,
- };
-
- // kECKeyMissingZeros is an ECPrivateKey containing a degenerate P-256 key where
- // the private key is one. The private key is incorrectly encoded without zero
- // padding.
- static const uint8_t kECKeyMissingZeros[] = {
- 0x30, 0x58, 0x02, 0x01, 0x01, 0x04, 0x01, 0x01, 0xa0, 0x0a, 0x06, 0x08, 0x2a,
- 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0xa1, 0x44, 0x03, 0x42, 0x00, 0x04,
- 0x6b, 0x17, 0xd1, 0xf2, 0xe1, 0x2c, 0x42, 0x47, 0xf8, 0xbc, 0xe6, 0xe5, 0x63,
- 0xa4, 0x40, 0xf2, 0x77, 0x03, 0x7d, 0x81, 0x2d, 0xeb, 0x33, 0xa0, 0xf4, 0xa1,
- 0x39, 0x45, 0xd8, 0x98, 0xc2, 0x96, 0x4f, 0xe3, 0x42, 0xe2, 0xfe, 0x1a, 0x7f,
- 0x9b, 0x8e, 0xe7, 0xeb, 0x4a, 0x7c, 0x0f, 0x9e, 0x16, 0x2b, 0xce, 0x33, 0x57,
- 0x6b, 0x31, 0x5e, 0xce, 0xcb, 0xb6, 0x40, 0x68, 0x37, 0xbf, 0x51, 0xf5,
- };
-
- // kECKeyMissingZeros is an ECPrivateKey containing a degenerate P-256 key where
- // the private key is one. The private key is encoded with the required zero
- // padding.
- static const uint8_t kECKeyWithZeros[] = {
- 0x30, 0x77, 0x02, 0x01, 0x01, 0x04, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
- 0xa0, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0xa1,
- 0x44, 0x03, 0x42, 0x00, 0x04, 0x6b, 0x17, 0xd1, 0xf2, 0xe1, 0x2c, 0x42, 0x47,
- 0xf8, 0xbc, 0xe6, 0xe5, 0x63, 0xa4, 0x40, 0xf2, 0x77, 0x03, 0x7d, 0x81, 0x2d,
- 0xeb, 0x33, 0xa0, 0xf4, 0xa1, 0x39, 0x45, 0xd8, 0x98, 0xc2, 0x96, 0x4f, 0xe3,
- 0x42, 0xe2, 0xfe, 0x1a, 0x7f, 0x9b, 0x8e, 0xe7, 0xeb, 0x4a, 0x7c, 0x0f, 0x9e,
- 0x16, 0x2b, 0xce, 0x33, 0x57, 0x6b, 0x31, 0x5e, 0xce, 0xcb, 0xb6, 0x40, 0x68,
- 0x37, 0xbf, 0x51, 0xf5,
- };
-
- // DecodeECPrivateKey decodes |in| as an ECPrivateKey structure and returns the
- // result or nullptr on error.
- static ScopedEC_KEY DecodeECPrivateKey(const uint8_t *in, size_t in_len) {
- const uint8_t *inp = in;
- ScopedEC_KEY ret(d2i_ECPrivateKey(NULL, &inp, in_len));
- if (!ret || inp != in + in_len) {
- return nullptr;
- }
- return ret;
- }
-
- // EncodeECPrivateKey encodes |key| as an ECPrivateKey structure into |*out|. It
- // returns true on success or false on error.
- static bool EncodeECPrivateKey(std::vector<uint8_t> *out, EC_KEY *key) {
- int len = i2d_ECPrivateKey(key, NULL);
- out->resize(len);
- uint8_t *outp = out->data();
- return i2d_ECPrivateKey(key, &outp) == len;
- }
-
- bool Testd2i_ECPrivateKey() {
- ScopedEC_KEY key = DecodeECPrivateKey(kECKeyWithoutPublic,
- sizeof(kECKeyWithoutPublic));
- if (!key) {
- fprintf(stderr, "Failed to parse private key.\n");
- ERR_print_errors_fp(stderr);
- return false;
- }
-
- std::vector<uint8_t> out;
- if (!EncodeECPrivateKey(&out, key.get())) {
- fprintf(stderr, "Failed to serialize private key.\n");
- ERR_print_errors_fp(stderr);
- return false;
- }
-
- if (std::vector<uint8_t>(kECKeyWithoutPublic,
- kECKeyWithoutPublic + sizeof(kECKeyWithoutPublic)) !=
- out) {
- fprintf(stderr, "Serialisation of key doesn't match original.\n");
- return false;
- }
-
- const EC_POINT *pub_key = EC_KEY_get0_public_key(key.get());
- if (pub_key == NULL) {
- fprintf(stderr, "Public key missing.\n");
- return false;
- }
-
- ScopedBIGNUM x(BN_new());
- ScopedBIGNUM y(BN_new());
- if (!x || !y) {
- return false;
- }
- if (!EC_POINT_get_affine_coordinates_GFp(EC_KEY_get0_group(key.get()),
- pub_key, x.get(), y.get(), NULL)) {
- fprintf(stderr, "Failed to get public key in affine coordinates.\n");
- return false;
- }
- ScopedOpenSSLString x_hex(BN_bn2hex(x.get()));
- ScopedOpenSSLString y_hex(BN_bn2hex(y.get()));
- if (!x_hex || !y_hex) {
- return false;
- }
- if (0 != strcmp(
- x_hex.get(),
- "c81561ecf2e54edefe6617db1c7a34a70744ddb261f269b83dacfcd2ade5a681") ||
- 0 != strcmp(
- y_hex.get(),
- "e0e2afa3f9b6abe4c698ef6495f1be49a3196c5056acb3763fe4507eec596e88")) {
- fprintf(stderr, "Incorrect public key: %s %s\n", x_hex.get(), y_hex.get());
- return false;
- }
-
- return true;
- }
-
- static bool TestZeroPadding() {
- // Check that the correct encoding round-trips.
- ScopedEC_KEY key = DecodeECPrivateKey(kECKeyWithZeros,
- sizeof(kECKeyWithZeros));
- std::vector<uint8_t> out;
- if (!key || !EncodeECPrivateKey(&out, key.get())) {
- ERR_print_errors_fp(stderr);
- return false;
- }
-
- if (std::vector<uint8_t>(kECKeyWithZeros,
- kECKeyWithZeros + sizeof(kECKeyWithZeros)) != out) {
- fprintf(stderr, "Serialisation of key was incorrect.\n");
- return false;
- }
-
- // Keys without leading zeros also parse, but they encode correctly.
- key = DecodeECPrivateKey(kECKeyMissingZeros, sizeof(kECKeyMissingZeros));
- if (!key || !EncodeECPrivateKey(&out, key.get())) {
- ERR_print_errors_fp(stderr);
- return false;
- }
-
- if (std::vector<uint8_t>(kECKeyWithZeros,
- kECKeyWithZeros + sizeof(kECKeyWithZeros)) != out) {
- fprintf(stderr, "Serialisation of key was incorrect.\n");
- return false;
- }
-
- return true;
- }
-
- bool TestSetAffine(const int nid) {
- ScopedEC_KEY key(EC_KEY_new_by_curve_name(nid));
- if (!key) {
- return false;
- }
-
- const EC_GROUP *const group = EC_KEY_get0_group(key.get());
-
- if (!EC_KEY_generate_key(key.get())) {
- fprintf(stderr, "EC_KEY_generate_key failed with nid %d\n", nid);
- ERR_print_errors_fp(stderr);
- return false;
- }
-
- if (!EC_POINT_is_on_curve(group, EC_KEY_get0_public_key(key.get()),
- nullptr)) {
- fprintf(stderr, "generated point is not on curve with nid %d", nid);
- ERR_print_errors_fp(stderr);
- return false;
- }
-
- ScopedBIGNUM x(BN_new());
- ScopedBIGNUM y(BN_new());
- if (!EC_POINT_get_affine_coordinates_GFp(group,
- EC_KEY_get0_public_key(key.get()),
- x.get(), y.get(), nullptr)) {
- fprintf(stderr, "EC_POINT_get_affine_coordinates_GFp failed with nid %d\n",
- nid);
- ERR_print_errors_fp(stderr);
- return false;
- }
-
- ScopedEC_POINT point(EC_POINT_new(group));
- if (!point) {
- return false;
- }
-
- if (!EC_POINT_set_affine_coordinates_GFp(group, point.get(), x.get(), y.get(),
- nullptr)) {
- fprintf(stderr, "EC_POINT_set_affine_coordinates_GFp failed with nid %d\n",
- nid);
- ERR_print_errors_fp(stderr);
- return false;
- }
-
- // Subtract one from |y| to make the point no longer on the curve.
- if (!BN_sub(y.get(), y.get(), BN_value_one())) {
- return false;
- }
-
- ScopedEC_POINT invalid_point(EC_POINT_new(group));
- if (!invalid_point) {
- return false;
- }
-
- if (EC_POINT_set_affine_coordinates_GFp(group, invalid_point.get(), x.get(),
- y.get(), nullptr)) {
- fprintf(stderr,
- "EC_POINT_set_affine_coordinates_GFp succeeded with invalid "
- "coordinates with nid %d\n",
- nid);
- ERR_print_errors_fp(stderr);
- return false;
- }
-
- return true;
- }
-
- int main(void) {
- CRYPTO_library_init();
- ERR_load_crypto_strings();
-
- if (!Testd2i_ECPrivateKey() ||
- !TestZeroPadding() ||
- !TestSetAffine(NID_secp224r1) ||
- !TestSetAffine(NID_X9_62_prime256v1) ||
- !TestSetAffine(NID_secp384r1) ||
- !TestSetAffine(NID_secp521r1)) {
- fprintf(stderr, "failed\n");
- return 1;
- }
-
- printf("PASS\n");
- return 0;
- }
|