X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fec%2Fecp_nistp224.c;h=2763398a335a0fe5f2710b0379f2cf713925f221;hp=5afe71c70c48597be74dd0016e8ba402798887fa;hb=207a56437916a715bcf6e299c868c75a17ad8fc0;hpb=b196e7d936fb377d9c5b305748ac25ff0e53ef6d diff --git a/crypto/ec/ecp_nistp224.c b/crypto/ec/ecp_nistp224.c index 5afe71c70c..2763398a33 100644 --- a/crypto/ec/ecp_nistp224.c +++ b/crypto/ec/ecp_nistp224.c @@ -1,7 +1,12 @@ -/* crypto/ec/ecp_nistp224.c */ /* - * Written by Emilia Kasper (Google) for the OpenSSL project. + * Copyright 2010-2019 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 2011 Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); @@ -26,7 +31,9 @@ */ #include -#ifndef OPENSSL_NO_EC_NISTP_64_GCC_128 +#ifdef OPENSSL_NO_EC_NISTP_64_GCC_128 +NON_EMPTY_TRANSLATION_UNIT +#else # include # include @@ -43,7 +50,6 @@ typedef __uint128_t uint128_t; /* nonstandard; implemented by gcc on 64-bit typedef uint8_t u8; typedef uint64_t u64; -typedef int64_t s64; /******************************************************************************/ /*- @@ -227,10 +233,11 @@ static const felem gmul[2][16][3] = { }; /* Precomputation for the group generator. */ -typedef struct { +struct nistp224_pre_comp_st { felem g_pre_comp[2][16][3]; int references; -} NISTP224_PRE_COMP; + CRYPTO_RWLOCK *lock; +}; const EC_METHOD *EC_GFp_nistp224_method(void) { @@ -244,6 +251,7 @@ const EC_METHOD *EC_GFp_nistp224_method(void) ec_GFp_nistp224_group_set_curve, ec_GFp_simple_group_get_curve, ec_GFp_simple_group_get_degree, + ec_group_simple_order_bits, ec_GFp_simple_group_check_discriminant, ec_GFp_simple_point_init, ec_GFp_simple_point_finish, @@ -271,9 +279,20 @@ const EC_METHOD *EC_GFp_nistp224_method(void) ec_GFp_nist_field_mul, ec_GFp_nist_field_sqr, 0 /* field_div */ , + ec_GFp_simple_field_inv, 0 /* field_encode */ , 0 /* field_decode */ , - 0 /* field_set_to_one */ + 0, /* field_set_to_one */ + ec_key_simple_priv2oct, + ec_key_simple_oct2priv, + 0, /* set private */ + ec_key_simple_generate_key, + ec_key_simple_check_key, + ec_key_simple_generate_public_key, + 0, /* keycopy */ + 0, /* keyfinish */ + ecdh_simple_compute_key, + 0 /* blind_coordinates */ }; return &ret; @@ -301,34 +320,21 @@ static void felem_to_bin28(u8 out[28], const felem in) } } -/* To preserve endianness when using BN_bn2bin and BN_bin2bn */ -static void flip_endian(u8 *out, const u8 *in, unsigned len) -{ - unsigned i; - for (i = 0; i < len; ++i) - out[i] = in[len - 1 - i]; -} - /* From OpenSSL BIGNUM to internal representation */ static int BN_to_felem(felem out, const BIGNUM *bn) { - felem_bytearray b_in; felem_bytearray b_out; - unsigned num_bytes; + int num_bytes; - /* BN_bn2bin eats leading zeroes */ - memset(b_out, 0, sizeof b_out); - num_bytes = BN_num_bytes(bn); - if (num_bytes > sizeof b_out) { + if (BN_is_negative(bn)) { ECerr(EC_F_BN_TO_FELEM, EC_R_BIGNUM_OUT_OF_RANGE); return 0; } - if (BN_is_negative(bn)) { + num_bytes = BN_bn2lebinpad(bn, b_out, sizeof(b_out)); + if (num_bytes < 0) { ECerr(EC_F_BN_TO_FELEM, EC_R_BIGNUM_OUT_OF_RANGE); return 0; } - num_bytes = BN_bn2bin(bn, b_in); - flip_endian(b_out, b_in, num_bytes); bin28_to_felem(out, b_out); return 1; } @@ -336,10 +342,9 @@ static int BN_to_felem(felem out, const BIGNUM *bn) /* From internal representation to OpenSSL BIGNUM */ static BIGNUM *felem_to_BN(BIGNUM *out, const felem in) { - felem_bytearray b_in, b_out; - felem_to_bin28(b_in, in); - flip_endian(b_out, b_in, sizeof b_out); - return BN_bin2bn(b_out, sizeof b_out, out); + felem_bytearray b_out; + felem_to_bin28(b_out, in); + return BN_lebin2bn(b_out, sizeof(b_out), out); } /******************************************************************************/ @@ -682,7 +687,7 @@ static limb felem_is_zero(const felem in) return (zero | two224m96p1 | two225m97p2); } -static limb felem_is_zero_int(const felem in) +static int felem_is_zero_int(const void *in) { return (int)(felem_is_zero(in) & ((limb) 1)); } @@ -1069,8 +1074,8 @@ static void select_point(const u64 idx, unsigned int size, { unsigned i, j; limb *outlimbs = &out[0][0]; - memset(outlimbs, 0, 3 * sizeof(felem)); + memset(out, 0, sizeof(*out) * 3); for (i = 0; i < size; i++) { const limb *inlimbs = &pre_comp[i][0][0]; u64 mask = i ^ idx; @@ -1113,7 +1118,7 @@ static void batch_mul(felem x_out, felem y_out, felem z_out, u8 sign, digit; /* set nq to the point at infinity */ - memset(nq, 0, 3 * sizeof(felem)); + memset(nq, 0, sizeof(nq)); /* * Loop over all scalars msb-to-lsb, interleaving additions of multiples @@ -1199,56 +1204,47 @@ static void batch_mul(felem x_out, felem y_out, felem z_out, static NISTP224_PRE_COMP *nistp224_pre_comp_new() { - NISTP224_PRE_COMP *ret = NULL; - ret = OPENSSL_malloc(sizeof *ret); + NISTP224_PRE_COMP *ret = OPENSSL_zalloc(sizeof(*ret)); + if (!ret) { ECerr(EC_F_NISTP224_PRE_COMP_NEW, ERR_R_MALLOC_FAILURE); return ret; } - memset(ret->g_pre_comp, 0, sizeof(ret->g_pre_comp)); - ret->references = 1; - return ret; -} - -static void *nistp224_pre_comp_dup(void *src_) -{ - NISTP224_PRE_COMP *src = src_; - /* no need to actually copy, these objects never change! */ - CRYPTO_add(&src->references, 1, CRYPTO_LOCK_EC_PRE_COMP); + ret->references = 1; - return src_; + ret->lock = CRYPTO_THREAD_lock_new(); + if (ret->lock == NULL) { + ECerr(EC_F_NISTP224_PRE_COMP_NEW, ERR_R_MALLOC_FAILURE); + OPENSSL_free(ret); + return NULL; + } + return ret; } -static void nistp224_pre_comp_free(void *pre_) +NISTP224_PRE_COMP *EC_nistp224_pre_comp_dup(NISTP224_PRE_COMP *p) { int i; - NISTP224_PRE_COMP *pre = pre_; - - if (!pre) - return; - - i = CRYPTO_add(&pre->references, -1, CRYPTO_LOCK_EC_PRE_COMP); - if (i > 0) - return; - - OPENSSL_free(pre); + if (p != NULL) + CRYPTO_atomic_add(&p->references, 1, &i, p->lock); + return p; } -static void nistp224_pre_comp_clear_free(void *pre_) +void EC_nistp224_pre_comp_free(NISTP224_PRE_COMP *p) { int i; - NISTP224_PRE_COMP *pre = pre_; - if (!pre) + if (p == NULL) return; - i = CRYPTO_add(&pre->references, -1, CRYPTO_LOCK_EC_PRE_COMP); + CRYPTO_atomic_add(&p->references, -1, &i, p->lock); + REF_PRINT_COUNT("EC_nistp224", x); if (i > 0) return; + REF_ASSERT_ISNT(i < 0); - OPENSSL_cleanse(pre, sizeof *pre); - OPENSSL_free(pre); + CRYPTO_THREAD_lock_free(p->lock); + OPENSSL_free(p); } /******************************************************************************/ @@ -1292,8 +1288,7 @@ int ec_GFp_nistp224_group_set_curve(EC_GROUP *group, const BIGNUM *p, ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx); err: BN_CTX_end(ctx); - if (new_ctx != NULL) - BN_CTX_free(new_ctx); + BN_CTX_free(new_ctx); return ret; } @@ -1357,7 +1352,6 @@ static void make_points_affine(size_t num, felem points[ /* num */ ][3], sizeof(felem), tmp_felems, (void (*)(void *))felem_one, - (int (*)(const void *)) felem_is_zero_int, (void (*)(void *, const void *)) felem_assign, @@ -1392,10 +1386,9 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r, BIGNUM *x, *y, *z, *tmp_scalar; felem_bytearray g_secret; felem_bytearray *secrets = NULL; - felem(*pre_comp)[17][3] = NULL; + felem (*pre_comp)[17][3] = NULL; felem *tmp_felems = NULL; - felem_bytearray tmp; - unsigned num_bytes; + int num_bytes; int have_pre_comp = 0; size_t num_points = num; felem x_in, y_in, z_in, x_out, y_out, z_out; @@ -1416,10 +1409,7 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r, goto err; if (scalar != NULL) { - pre = EC_EX_DATA_get_data(group->extra_data, - nistp224_pre_comp_dup, - nistp224_pre_comp_free, - nistp224_pre_comp_clear_free); + pre = group->pre_comp.nistp224; if (pre) /* we have precomputation, try to use it */ g_pre_comp = (const felem(*)[16][3])pre->g_pre_comp; @@ -1459,11 +1449,11 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r, */ mixed = 1; } - secrets = OPENSSL_malloc(num_points * sizeof(felem_bytearray)); - pre_comp = OPENSSL_malloc(num_points * 17 * 3 * sizeof(felem)); + secrets = OPENSSL_zalloc(sizeof(*secrets) * num_points); + pre_comp = OPENSSL_zalloc(sizeof(*pre_comp) * num_points); if (mixed) tmp_felems = - OPENSSL_malloc((num_points * 17 + 1) * sizeof(felem)); + OPENSSL_malloc(sizeof(felem) * (num_points * 17 + 1)); if ((secrets == NULL) || (pre_comp == NULL) || (mixed && (tmp_felems == NULL))) { ECerr(EC_F_EC_GFP_NISTP224_POINTS_MUL, ERR_R_MALLOC_FAILURE); @@ -1474,17 +1464,13 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r, * we treat NULL scalars as 0, and NULL points as points at infinity, * i.e., they contribute nothing to the linear combination */ - memset(secrets, 0, num_points * sizeof(felem_bytearray)); - memset(pre_comp, 0, num_points * 17 * 3 * sizeof(felem)); for (i = 0; i < num_points; ++i) { - if (i == num) + if (i == num) { /* the generator */ - { p = EC_GROUP_get0_generator(group); p_scalar = scalar; - } else + } else { /* the i^th point */ - { p = points[i]; p_scalar = scalars[i]; } @@ -1500,10 +1486,16 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r, ECerr(EC_F_EC_GFP_NISTP224_POINTS_MUL, ERR_R_BN_LIB); goto err; } - num_bytes = BN_bn2bin(tmp_scalar, tmp); - } else - num_bytes = BN_bn2bin(p_scalar, tmp); - flip_endian(secrets[i], tmp, num_bytes); + num_bytes = BN_bn2lebinpad(tmp_scalar, + secrets[i], sizeof(secrets[i])); + } else { + num_bytes = BN_bn2lebinpad(p_scalar, + secrets[i], sizeof(secrets[i])); + } + if (num_bytes < 0) { + ECerr(EC_F_EC_GFP_NISTP224_POINTS_MUL, ERR_R_BN_LIB); + goto err; + } /* precompute multiples */ if ((!BN_to_felem(x_out, p->X)) || (!BN_to_felem(y_out, p->Y)) || @@ -1535,7 +1527,7 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r, /* the scalar for the generator */ if ((scalar != NULL) && (have_pre_comp)) { - memset(g_secret, 0, sizeof g_secret); + memset(g_secret, 0, sizeof(g_secret)); /* reduce scalar to 0 <= scalar < 2^224 */ if ((BN_num_bits(scalar) > 224) || (BN_is_negative(scalar))) { /* @@ -1546,20 +1538,21 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r, ECerr(EC_F_EC_GFP_NISTP224_POINTS_MUL, ERR_R_BN_LIB); goto err; } - num_bytes = BN_bn2bin(tmp_scalar, tmp); - } else - num_bytes = BN_bn2bin(scalar, tmp); - flip_endian(g_secret, tmp, num_bytes); + num_bytes = BN_bn2lebinpad(tmp_scalar, g_secret, sizeof(g_secret)); + } else { + num_bytes = BN_bn2lebinpad(scalar, g_secret, sizeof(g_secret)); + } /* do the multiplication with generator precomputation */ batch_mul(x_out, y_out, z_out, (const felem_bytearray(*))secrets, num_points, g_secret, mixed, (const felem(*)[17][3])pre_comp, g_pre_comp); - } else + } else { /* do the multiplication without generator precomputation */ batch_mul(x_out, y_out, z_out, (const felem_bytearray(*))secrets, num_points, NULL, mixed, (const felem(*)[17][3])pre_comp, NULL); + } /* reduce the output to its unique minimal representation */ felem_contract(x_in, x_out); felem_contract(y_in, y_out); @@ -1574,14 +1567,10 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r, err: BN_CTX_end(ctx); EC_POINT_free(generator); - if (new_ctx != NULL) - BN_CTX_free(new_ctx); - if (secrets != NULL) - OPENSSL_free(secrets); - if (pre_comp != NULL) - OPENSSL_free(pre_comp); - if (tmp_felems != NULL) - OPENSSL_free(tmp_felems); + BN_CTX_free(new_ctx); + OPENSSL_free(secrets); + OPENSSL_free(pre_comp); + OPENSSL_free(tmp_felems); return ret; } @@ -1596,9 +1585,7 @@ int ec_GFp_nistp224_precompute_mult(EC_GROUP *group, BN_CTX *ctx) felem tmp_felems[32]; /* throw away old precomputation */ - EC_EX_DATA_free_data(&group->extra_data, nistp224_pre_comp_dup, - nistp224_pre_comp_free, - nistp224_pre_comp_clear_free); + EC_pre_comp_free(group); if (ctx == NULL) if ((ctx = new_ctx = BN_CTX_new()) == NULL) return 0; @@ -1622,8 +1609,7 @@ int ec_GFp_nistp224_precompute_mult(EC_GROUP *group, BN_CTX *ctx) */ if (0 == EC_POINT_cmp(group, generator, group->generator, ctx)) { memcpy(pre->g_pre_comp, gmul, sizeof(pre->g_pre_comp)); - ret = 1; - goto err; + goto done; } if ((!BN_to_felem(pre->g_pre_comp[0][1][0], group->generator->X)) || (!BN_to_felem(pre->g_pre_comp[0][1][1], group->generator->Y)) || @@ -1701,32 +1687,21 @@ int ec_GFp_nistp224_precompute_mult(EC_GROUP *group, BN_CTX *ctx) } make_points_affine(31, &(pre->g_pre_comp[0][1]), tmp_felems); - if (!EC_EX_DATA_set_data(&group->extra_data, pre, nistp224_pre_comp_dup, - nistp224_pre_comp_free, - nistp224_pre_comp_clear_free)) - goto err; - ret = 1; + done: + SETPRECOMP(group, nistp224, pre); pre = NULL; + ret = 1; err: BN_CTX_end(ctx); EC_POINT_free(generator); - if (new_ctx != NULL) - BN_CTX_free(new_ctx); - nistp224_pre_comp_free(pre); + BN_CTX_free(new_ctx); + EC_nistp224_pre_comp_free(pre); return ret; } int ec_GFp_nistp224_have_precompute_mult(const EC_GROUP *group) { - if (EC_EX_DATA_get_data(group->extra_data, nistp224_pre_comp_dup, - nistp224_pre_comp_free, - nistp224_pre_comp_clear_free) - != NULL) - return 1; - else - return 0; + return HAVEPRECOMP(group, nistp224); } -#else -static void *dummy = &dummy; #endif