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openssl/test/ecdhtest.c
Rich Salz 440e5d805f Copyright consolidation 02/10 
Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-05-17 14:20:27 -04:00

613 lines
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/*
* 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.
*
* The Elliptic Curve Public-Key Crypto Library (ECC Code) included
* herein is developed by SUN MICROSYSTEMS, INC., and is contributed
* to the OpenSSL project.
*
* The ECC Code is licensed pursuant to the OpenSSL open source
* license provided below.
*
* The ECDH software is originally written by Douglas Stebila of
* Sun Microsystems Laboratories.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../e_os.h"
#include <openssl/opensslconf.h> /* for OPENSSL_NO_EC */
#include <openssl/crypto.h>
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/objects.h>
#include <openssl/rand.h>
#include <openssl/sha.h>
#include <openssl/err.h>
#ifdef OPENSSL_NO_EC
int main(int argc, char *argv[])
{
printf("No ECDH support\n");
return (0);
}
#else
# include <openssl/ec.h>
static const char rnd_seed[] =
"string to make the random number generator think it has entropy";
static const int KDF1_SHA1_len = 20;
static void *KDF1_SHA1(const void *in, size_t inlen, void *out,
size_t *outlen)
{
if (*outlen < SHA_DIGEST_LENGTH)
return NULL;
*outlen = SHA_DIGEST_LENGTH;
return SHA1(in, inlen, out);
}
static int test_ecdh_curve(int nid, BN_CTX *ctx, BIO *out)
{
EC_KEY *a = NULL;
EC_KEY *b = NULL;
BIGNUM *x_a = NULL, *y_a = NULL, *x_b = NULL, *y_b = NULL;
char buf[12];
unsigned char *abuf = NULL, *bbuf = NULL;
int i, alen, blen, aout, bout, ret = 0;
const EC_GROUP *group;
a = EC_KEY_new_by_curve_name(nid);
b = EC_KEY_new_by_curve_name(nid);
if (a == NULL || b == NULL)
goto err;
group = EC_KEY_get0_group(a);
if ((x_a = BN_new()) == NULL)
goto err;
if ((y_a = BN_new()) == NULL)
goto err;
if ((x_b = BN_new()) == NULL)
goto err;
if ((y_b = BN_new()) == NULL)
goto err;
BIO_puts(out, "Testing key generation with ");
BIO_puts(out, OBJ_nid2sn(nid));
# ifdef NOISY
BIO_puts(out, "\n");
# else
(void)BIO_flush(out);
# endif
if (!EC_KEY_generate_key(a))
goto err;
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) ==
NID_X9_62_prime_field) {
if (!EC_POINT_get_affine_coordinates_GFp
(group, EC_KEY_get0_public_key(a), x_a, y_a, ctx))
goto err;
}
# ifndef OPENSSL_NO_EC2M
else {
if (!EC_POINT_get_affine_coordinates_GF2m(group,
EC_KEY_get0_public_key(a),
x_a, y_a, ctx))
goto err;
}
# endif
# ifdef NOISY
BIO_puts(out, " pri 1=");
BN_print(out, a->priv_key);
BIO_puts(out, "\n pub 1=");
BN_print(out, x_a);
BIO_puts(out, ",");
BN_print(out, y_a);
BIO_puts(out, "\n");
# else
BIO_printf(out, " .");
(void)BIO_flush(out);
# endif
if (!EC_KEY_generate_key(b))
goto err;
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) ==
NID_X9_62_prime_field) {
if (!EC_POINT_get_affine_coordinates_GFp
(group, EC_KEY_get0_public_key(b), x_b, y_b, ctx))
goto err;
}
# ifndef OPENSSL_NO_EC2M
else {
if (!EC_POINT_get_affine_coordinates_GF2m(group,
EC_KEY_get0_public_key(b),
x_b, y_b, ctx))
goto err;
}
# endif
# ifdef NOISY
BIO_puts(out, " pri 2=");
BN_print(out, b->priv_key);
BIO_puts(out, "\n pub 2=");
BN_print(out, x_b);
BIO_puts(out, ",");
BN_print(out, y_b);
BIO_puts(out, "\n");
# else
BIO_printf(out, ".");
(void)BIO_flush(out);
# endif
alen = KDF1_SHA1_len;
abuf = OPENSSL_malloc(alen);
aout =
ECDH_compute_key(abuf, alen, EC_KEY_get0_public_key(b), a, KDF1_SHA1);
# ifdef NOISY
BIO_puts(out, " key1 =");
for (i = 0; i < aout; i++) {
sprintf(buf, "%02X", abuf[i]);
BIO_puts(out, buf);
}
BIO_puts(out, "\n");
# else
BIO_printf(out, ".");
(void)BIO_flush(out);
# endif
blen = KDF1_SHA1_len;
bbuf = OPENSSL_malloc(blen);
bout =
ECDH_compute_key(bbuf, blen, EC_KEY_get0_public_key(a), b, KDF1_SHA1);
# ifdef NOISY
BIO_puts(out, " key2 =");
for (i = 0; i < bout; i++) {
sprintf(buf, "%02X", bbuf[i]);
BIO_puts(out, buf);
}
BIO_puts(out, "\n");
# else
BIO_printf(out, ".");
(void)BIO_flush(out);
# endif
if ((aout < 4) || (bout != aout) || (memcmp(abuf, bbuf, aout) != 0)) {
# ifndef NOISY
BIO_printf(out, " failed\n\n");
BIO_printf(out, "key a:\n");
BIO_printf(out, "private key: ");
BN_print(out, EC_KEY_get0_private_key(a));
BIO_printf(out, "\n");
BIO_printf(out, "public key (x,y): ");
BN_print(out, x_a);
BIO_printf(out, ",");
BN_print(out, y_a);
BIO_printf(out, "\nkey b:\n");
BIO_printf(out, "private key: ");
BN_print(out, EC_KEY_get0_private_key(b));
BIO_printf(out, "\n");
BIO_printf(out, "public key (x,y): ");
BN_print(out, x_b);
BIO_printf(out, ",");
BN_print(out, y_b);
BIO_printf(out, "\n");
BIO_printf(out, "generated key a: ");
for (i = 0; i < bout; i++) {
sprintf(buf, "%02X", bbuf[i]);
BIO_puts(out, buf);
}
BIO_printf(out, "\n");
BIO_printf(out, "generated key b: ");
for (i = 0; i < aout; i++) {
sprintf(buf, "%02X", abuf[i]);
BIO_puts(out, buf);
}
BIO_printf(out, "\n");
# endif
fprintf(stderr, "Error in ECDH routines\n");
ret = 0;
} else {
# ifndef NOISY
BIO_printf(out, " ok\n");
# endif
ret = 1;
}
err:
ERR_print_errors_fp(stderr);
OPENSSL_free(abuf);
OPENSSL_free(bbuf);
BN_free(x_a);
BN_free(y_a);
BN_free(x_b);
BN_free(y_b);
EC_KEY_free(b);
EC_KEY_free(a);
return (ret);
}
typedef struct {
const int nid;
const char *da;
const char *db;
const char *Z;
} ecdh_kat_t;
static const ecdh_kat_t ecdh_kats[] = {
/* Keys and shared secrets from RFC 5114 */
{ NID_X9_62_prime192v1,
"323FA3169D8E9C6593F59476BC142000AB5BE0E249C43426",
"631F95BB4A67632C9C476EEE9AB695AB240A0499307FCF62",
"AD420182633F8526BFE954ACDA376F05E5FF4F837F54FEBE" },
{ NID_secp224r1,
"B558EB6C288DA707BBB4F8FBAE2AB9E9CB62E3BC5C7573E22E26D37F",
"AC3B1ADD3D9770E6F6A708EE9F3B8E0AB3B480E9F27F85C88B5E6D18",
"52272F50F46F4EDC9151569092F46DF2D96ECC3B6DC1714A4EA949FA" },
{ NID_X9_62_prime256v1,
"814264145F2F56F2E96A8E337A1284993FAF432A5ABCE59E867B7291D507A3AF",
"2CE1788EC197E096DB95A200CC0AB26A19CE6BCCAD562B8EEE1B593761CF7F41",
"DD0F5396219D1EA393310412D19A08F1F5811E9DC8EC8EEA7F80D21C820C2788" },
{ NID_secp384r1,
"D27335EA71664AF244DD14E9FD1260715DFD8A7965571C48D709EE7A7962A156"
"D706A90CBCB5DF2986F05FEADB9376F1",
"52D1791FDB4B70F89C0F00D456C2F7023B6125262C36A7DF1F80231121CCE3D3"
"9BE52E00C194A4132C4A6C768BCD94D2",
"5EA1FC4AF7256D2055981B110575E0A8CAE53160137D904C59D926EB1B8456E4"
"27AA8A4540884C37DE159A58028ABC0E" },
{ NID_secp521r1,
"0113F82DA825735E3D97276683B2B74277BAD27335EA71664AF2430CC4F33459"
"B9669EE78B3FFB9B8683015D344DCBFEF6FB9AF4C6C470BE254516CD3C1A1FB4"
"7362",
"00CEE3480D8645A17D249F2776D28BAE616952D1791FDB4B70F7C3378732AA1B"
"22928448BCD1DC2496D435B01048066EBE4F72903C361B1A9DC1193DC2C9D089"
"1B96",
"00CDEA89621CFA46B132F9E4CFE2261CDE2D4368EB5656634C7CC98C7A00CDE5"
"4ED1866A0DD3E6126C9D2F845DAFF82CEB1DA08F5D87521BB0EBECA77911169C"
"20CC" },
/* Keys and shared secrets from RFC 5903 */
{ NID_X9_62_prime256v1,
"C88F01F510D9AC3F70A292DAA2316DE544E9AAB8AFE84049C62A9C57862D1433",
"C6EF9C5D78AE012A011164ACB397CE2088685D8F06BF9BE0B283AB46476BEE53",
"D6840F6B42F6EDAFD13116E0E12565202FEF8E9ECE7DCE03812464D04B9442DE" },
{ NID_secp384r1,
"099F3C7034D4A2C699884D73A375A67F7624EF7C6B3C0F160647B67414DCE655"
"E35B538041E649EE3FAEF896783AB194",
"41CB0779B4BDB85D47846725FBEC3C9430FAB46CC8DC5060855CC9BDA0AA2942"
"E0308312916B8ED2960E4BD55A7448FC",
"11187331C279962D93D604243FD592CB9D0A926F422E47187521287E7156C5C4"
"D603135569B9E9D09CF5D4A270F59746" },
{ NID_secp521r1,
"0037ADE9319A89F4DABDB3EF411AACCCA5123C61ACAB57B5393DCE47608172A0"
"95AA85A30FE1C2952C6771D937BA9777F5957B2639BAB072462F68C27A57382D"
"4A52",
"0145BA99A847AF43793FDD0E872E7CDFA16BE30FDC780F97BCCC3F078380201E"
"9C677D600B343757A3BDBF2A3163E4C2F869CCA7458AA4A4EFFC311F5CB15168"
"5EB9",
"01144C7D79AE6956BC8EDB8E7C787C4521CB086FA64407F97894E5E6B2D79B04"
"D1427E73CA4BAA240A34786859810C06B3C715A3A8CC3151F2BEE417996D19F3"
"DDEA" },
/* Keys and shared secrets from RFC 7027 */
{ NID_brainpoolP256r1,
"81DB1EE100150FF2EA338D708271BE38300CB54241D79950F77B063039804F1D",
"55E40BC41E37E3E2AD25C3C6654511FFA8474A91A0032087593852D3E7D76BD3",
"89AFC39D41D3B327814B80940B042590F96556EC91E6AE7939BCE31F3A18BF2B" },
{ NID_brainpoolP384r1,
"1E20F5E048A5886F1F157C74E91BDE2B98C8B52D58E5003D57053FC4B0BD65D6"
"F15EB5D1EE1610DF870795143627D042",
"032640BC6003C59260F7250C3DB58CE647F98E1260ACCE4ACDA3DD869F74E01F"
"8BA5E0324309DB6A9831497ABAC96670",
"0BD9D3A7EA0B3D519D09D8E48D0785FB744A6B355E6304BC51C229FBBCE239BB"
"ADF6403715C35D4FB2A5444F575D4F42" },
{ NID_brainpoolP512r1,
"16302FF0DBBB5A8D733DAB7141C1B45ACBC8715939677F6A56850A38BD87BD59"
"B09E80279609FF333EB9D4C061231FB26F92EEB04982A5F1D1764CAD57665422",
"230E18E1BCC88A362FA54E4EA3902009292F7F8033624FD471B5D8ACE49D12CF"
"ABBC19963DAB8E2F1EBA00BFFB29E4D72D13F2224562F405CB80503666B25429",
"A7927098655F1F9976FA50A9D566865DC530331846381C87256BAF3226244B76"
"D36403C024D7BBF0AA0803EAFF405D3D24F11A9B5C0BEF679FE1454B21C4CD1F" }
};
/* Given private value and NID, create EC_KEY structure */
static EC_KEY *mk_eckey(int nid, const char *str)
{
int ok = 0;
EC_KEY *k = NULL;
BIGNUM *priv = NULL;
EC_POINT *pub = NULL;
const EC_GROUP *grp;
k = EC_KEY_new_by_curve_name(nid);
if (!k)
goto err;
if(!BN_hex2bn(&priv, str))
goto err;
if (!priv)
goto err;
if (!EC_KEY_set_private_key(k, priv))
goto err;
grp = EC_KEY_get0_group(k);
pub = EC_POINT_new(grp);
if (!pub)
goto err;
if (!EC_POINT_mul(grp, pub, priv, NULL, NULL, NULL))
goto err;
if (!EC_KEY_set_public_key(k, pub))
goto err;
ok = 1;
err:
BN_clear_free(priv);
EC_POINT_free(pub);
if (ok)
return k;
EC_KEY_free(k);
return NULL;
}
/*
* Known answer test: compute shared secret and check it matches expected
* value.
*/
static int ecdh_kat(BIO *out, const ecdh_kat_t *kat)
{
int rv = 0;
EC_KEY *key1 = NULL, *key2 = NULL;
BIGNUM *bnz = NULL;
unsigned char *Ztmp = NULL, *Z = NULL;
size_t Ztmplen, Zlen;
BIO_puts(out, "Testing ECDH shared secret with ");
BIO_puts(out, OBJ_nid2sn(kat->nid));
if(!BN_hex2bn(&bnz, kat->Z))
goto err;
key1 = mk_eckey(kat->nid, kat->da);
key2 = mk_eckey(kat->nid, kat->db);
if (!key1 || !key2)
goto err;
Ztmplen = (EC_GROUP_get_degree(EC_KEY_get0_group(key1)) + 7) / 8;
Zlen = BN_num_bytes(bnz);
if (Zlen > Ztmplen)
goto err;
if((Ztmp = OPENSSL_zalloc(Ztmplen)) == NULL)
goto err;
if((Z = OPENSSL_zalloc(Ztmplen)) == NULL)
goto err;
if(!BN_bn2binpad(bnz, Z, Ztmplen))
goto err;
if (!ECDH_compute_key(Ztmp, Ztmplen,
EC_KEY_get0_public_key(key2), key1, 0))
goto err;
if (memcmp(Ztmp, Z, Ztmplen))
goto err;
memset(Ztmp, 0, Ztmplen);
if (!ECDH_compute_key(Ztmp, Ztmplen,
EC_KEY_get0_public_key(key1), key2, 0))
goto err;
if (memcmp(Ztmp, Z, Ztmplen))
goto err;
rv = 1;
err:
EC_KEY_free(key1);
EC_KEY_free(key2);
OPENSSL_free(Ztmp);
OPENSSL_free(Z);
BN_free(bnz);
if (rv)
BIO_puts(out, " ok\n");
else {
fprintf(stderr, "Error in ECDH routines\n");
ERR_print_errors_fp(stderr);
}
return rv;
}
#include "ecdhtest_cavs.h"
/*
* NIST SP800-56A co-factor ECDH tests.
* KATs taken from NIST documents with parameters:
*
* - (QCAVSx,QCAVSy) is the public key for CAVS.
* - dIUT is the private key for IUT.
* - (QIUTx,QIUTy) is the public key for IUT.
* - ZIUT is the shared secret KAT.
*
* CAVS: Cryptographic Algorithm Validation System
* IUT: Implementation Under Test
*
* This function tests two things:
*
* 1. dIUT * G = (QIUTx,QIUTy)
* i.e. public key for IUT computes correctly.
* 2. x-coord of cofactor * dIUT * (QCAVSx,QCAVSy) = ZIUT
* i.e. co-factor ECDH key computes correctly.
*
* returns zero on failure or unsupported curve. One otherwise.
*/
static int ecdh_cavs_kat(BIO *out, const ecdh_cavs_kat_t *kat)
{
int rv = 0, is_char_two = 0;
EC_KEY *key1 = NULL;
EC_POINT *pub = NULL;
const EC_GROUP *group = NULL;
BIGNUM *bnz = NULL, *x = NULL, *y = NULL;
unsigned char *Ztmp = NULL, *Z = NULL;
size_t Ztmplen, Zlen;
BIO_puts(out, "Testing ECC CDH Primitive SP800-56A with ");
BIO_puts(out, OBJ_nid2sn(kat->nid));
/* dIUT is IUT's private key */
if ((key1 = mk_eckey(kat->nid, kat->dIUT)) == NULL)
goto err;
/* these are cofactor ECDH KATs */
EC_KEY_set_flags(key1, EC_FLAG_COFACTOR_ECDH);
if ((group = EC_KEY_get0_group(key1)) == NULL)
goto err;
if ((pub = EC_POINT_new(group)) == NULL)
goto err;
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_characteristic_two_field)
is_char_two = 1;
/* (QIUTx, QIUTy) is IUT's public key */
if(!BN_hex2bn(&x, kat->QIUTx))
goto err;
if(!BN_hex2bn(&y, kat->QIUTy))
goto err;
if (is_char_two) {
#ifdef OPENSSL_NO_EC2M
goto err;
#else
if (!EC_POINT_set_affine_coordinates_GF2m(group, pub, x, y, NULL))
goto err;
#endif
}
else {
if (!EC_POINT_set_affine_coordinates_GFp(group, pub, x, y, NULL))
goto err;
}
/* dIUT * G = (QIUTx, QIUTy) should hold */
if (EC_POINT_cmp(group, EC_KEY_get0_public_key(key1), pub, NULL))
goto err;
/* (QCAVSx, QCAVSy) is CAVS's public key */
if(!BN_hex2bn(&x, kat->QCAVSx))
goto err;
if(!BN_hex2bn(&y, kat->QCAVSy))
goto err;
if (is_char_two) {
#ifdef OPENSSL_NO_EC2M
goto err;
#else
if (!EC_POINT_set_affine_coordinates_GF2m(group, pub, x, y, NULL))
goto err;
#endif
}
else {
if (!EC_POINT_set_affine_coordinates_GFp(group, pub, x, y, NULL))
goto err;
}
/* ZIUT is the shared secret */
if(!BN_hex2bn(&bnz, kat->ZIUT))
goto err;
Ztmplen = (EC_GROUP_get_degree(EC_KEY_get0_group(key1)) + 7) / 8;
Zlen = BN_num_bytes(bnz);
if (Zlen > Ztmplen)
goto err;
if((Ztmp = OPENSSL_zalloc(Ztmplen)) == NULL)
goto err;
if((Z = OPENSSL_zalloc(Ztmplen)) == NULL)
goto err;
if(!BN_bn2binpad(bnz, Z, Ztmplen))
goto err;
if (!ECDH_compute_key(Ztmp, Ztmplen, pub, key1, 0))
goto err;
/* shared secrets should be identical */
if (memcmp(Ztmp, Z, Ztmplen))
goto err;
rv = 1;
err:
EC_KEY_free(key1);
EC_POINT_free(pub);
BN_free(bnz);
BN_free(x);
BN_free(y);
OPENSSL_free(Ztmp);
OPENSSL_free(Z);
if (rv) {
BIO_puts(out, " ok\n");
}
else {
fprintf(stderr, "Error in ECC CDH routines\n");
ERR_print_errors_fp(stderr);
}
return rv;
}
int main(int argc, char *argv[])
{
BN_CTX *ctx = NULL;
int nid, ret = 1;
EC_builtin_curve *curves = NULL;
size_t crv_len = 0, n = 0;
BIO *out;
CRYPTO_set_mem_debug(1);
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
RAND_seed(rnd_seed, sizeof rnd_seed);
out = BIO_new(BIO_s_file());
if (out == NULL)
EXIT(1);
BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
if ((ctx = BN_CTX_new()) == NULL)
goto err;
/* 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) goto err;
if (!EC_get_builtin_curves(curves, crv_len)) goto err;
/* NAMED CURVES TESTS */
for (n = 0; n < crv_len; n++) {
nid = curves[n].nid;
/*
* Skipped for X25519 because affine coordinate operations are not
* supported for this curve.
* Higher level ECDH tests are performed in evptests.txt instead.
*/
if (nid == NID_X25519)
continue;
if (!test_ecdh_curve(nid, ctx, out)) goto err;
}
/* KATs */
for (n = 0; n < (sizeof(ecdh_kats)/sizeof(ecdh_kat_t)); n++) {
if (!ecdh_kat(out, &ecdh_kats[n]))
goto err;
}
/* NIST SP800-56A co-factor ECDH KATs */
for (n = 0; n < (sizeof(ecdh_cavs_kats)/sizeof(ecdh_cavs_kat_t)); n++) {
if (!ecdh_cavs_kat(out, &ecdh_cavs_kats[n]))
goto err;
}
ret = 0;
err:
ERR_print_errors_fp(stderr);
OPENSSL_free(curves);
BN_CTX_free(ctx);
BIO_free(out);
#ifndef OPENSSL_NO_CRYPTO_MDEBUG
if (CRYPTO_mem_leaks_fp(stderr) <= 0)
ret = 1;
#endif
EXIT(ret);
}
#endif
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