-/* crypto/ec/ecp_nistp256.c */
/*
* Written by Adam Langley (Google) for the OpenSSL project
*/
*/
#include <openssl/opensslconf.h>
-#ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
+#ifdef OPENSSL_NO_EC_NISTP_64_GCC_128
+NON_EMPTY_TRANSLATION_UNIT
+#else
# include <stdint.h>
# include <string.h>
unsigned num_bytes;
/* BN_bn2bin eats leading zeroes */
- memset(b_out, 0, sizeof b_out);
+ memset(b_out, 0, sizeof(b_out));
num_bytes = BN_num_bytes(bn);
if (num_bytes > sizeof b_out) {
ECerr(EC_F_BN_TO_FELEM, EC_R_BIGNUM_OUT_OF_RANGE);
}
/*-
- * point_add calcuates (x1, y1, z1) + (x2, y2, z2)
+ * point_add calculates (x1, y1, z1) + (x2, y2, z2)
*
* The method is taken from:
* http://hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-3.html#addition-add-2007-bl,
{
unsigned i, j;
u64 *outlimbs = &out[0][0];
- memset(outlimbs, 0, 3 * sizeof(smallfelem));
+
+ memset(out, 0, sizeof(*out) * 3);
for (i = 0; i < size; i++) {
const u64 *inlimbs = (u64 *)&pre_comp[i][0][0];
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
}
/* Precomputation for the group generator. */
-typedef struct {
+struct nistp256_pre_comp_st {
smallfelem g_pre_comp[2][16][3];
int references;
-} NISTP256_PRE_COMP;
+};
const EC_METHOD *EC_GFp_nistp256_method(void)
{
ec_GFp_nistp256_group_set_curve,
ec_GFp_simple_group_get_curve,
ec_GFp_simple_group_get_degree,
+ 0, /* group_order_bits */
ec_GFp_simple_group_check_discriminant,
ec_GFp_simple_point_init,
ec_GFp_simple_point_finish,
static NISTP256_PRE_COMP *nistp256_pre_comp_new()
{
- NISTP256_PRE_COMP *ret = NULL;
- ret = OPENSSL_malloc(sizeof *ret);
- if (!ret) {
+ NISTP256_PRE_COMP *ret = OPENSSL_zalloc(sizeof(*ret));
+
+ if (ret == NULL) {
ECerr(EC_F_NISTP256_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 *nistp256_pre_comp_dup(void *src_)
+NISTP256_PRE_COMP *EC_nistp256_pre_comp_dup(NISTP256_PRE_COMP *p)
{
- NISTP256_PRE_COMP *src = src_;
-
- /* no need to actually copy, these objects never change! */
- CRYPTO_add(&src->references, 1, CRYPTO_LOCK_EC_PRE_COMP);
-
- return src_;
+ if (p != NULL)
+ CRYPTO_add(&p->references, 1, CRYPTO_LOCK_EC_PRE_COMP);
+ return p;
}
-static void nistp256_pre_comp_free(void *pre_)
+void EC_nistp256_pre_comp_free(NISTP256_PRE_COMP *pre)
{
- int i;
- NISTP256_PRE_COMP *pre = pre_;
-
- if (!pre)
- return;
-
- i = CRYPTO_add(&pre->references, -1, CRYPTO_LOCK_EC_PRE_COMP);
- if (i > 0)
+ if (pre == NULL
+ || CRYPTO_add(&pre->references, -1, CRYPTO_LOCK_EC_PRE_COMP) > 0)
return;
-
- OPENSSL_free(pre);
-}
-
-static void nistp256_pre_comp_clear_free(void *pre_)
-{
- int i;
- NISTP256_PRE_COMP *pre = pre_;
-
- if (!pre)
- return;
-
- i = CRYPTO_add(&pre->references, -1, CRYPTO_LOCK_EC_PRE_COMP);
- if (i > 0)
- return;
-
- OPENSSL_cleanse(pre, sizeof *pre);
OPENSSL_free(pre);
}
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;
}
BIGNUM *x, *y, *z, *tmp_scalar;
felem_bytearray g_secret;
felem_bytearray *secrets = NULL;
- smallfelem(*pre_comp)[17][3] = NULL;
+ smallfelem (*pre_comp)[17][3] = NULL;
smallfelem *tmp_smallfelems = NULL;
felem_bytearray tmp;
unsigned i, num_bytes;
goto err;
if (scalar != NULL) {
- pre = EC_EX_DATA_get_data(group->extra_data,
- nistp256_pre_comp_dup,
- nistp256_pre_comp_free,
- nistp256_pre_comp_clear_free);
+ pre = group->pre_comp.nistp256;
if (pre)
/* we have precomputation, try to use it */
g_pre_comp = (const smallfelem(*)[16][3])pre->g_pre_comp;
*/
mixed = 1;
}
- secrets = OPENSSL_malloc(num_points * sizeof(felem_bytearray));
- pre_comp = OPENSSL_malloc(num_points * 17 * 3 * sizeof(smallfelem));
+ secrets = OPENSSL_malloc(sizeof(*secrets) * num_points);
+ pre_comp = OPENSSL_malloc(sizeof(*pre_comp) * num_points);
if (mixed)
tmp_smallfelems =
- OPENSSL_malloc((num_points * 17 + 1) * sizeof(smallfelem));
+ OPENSSL_malloc(sizeof(*tmp_smallfelems) * (num_points * 17 + 1));
if ((secrets == NULL) || (pre_comp == NULL)
|| (mixed && (tmp_smallfelems == NULL))) {
ECerr(EC_F_EC_GFP_NISTP256_POINTS_MUL, ERR_R_MALLOC_FAILURE);
* 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(smallfelem));
+ memset(secrets, 0, sizeof(*secrets) * num_points);
+ memset(pre_comp, 0, sizeof(*pre_comp) * num_points);
for (i = 0; i < num_points; ++i) {
if (i == num)
/*
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_smallfelems != NULL)
- OPENSSL_free(tmp_smallfelems);
+ BN_CTX_free(new_ctx);
+ OPENSSL_free(secrets);
+ OPENSSL_free(pre_comp);
+ OPENSSL_free(tmp_smallfelems);
return ret;
}
felem x_tmp, y_tmp, z_tmp;
/* throw away old precomputation */
- EC_EX_DATA_free_data(&group->extra_data, nistp256_pre_comp_dup,
- nistp256_pre_comp_free,
- nistp256_pre_comp_clear_free);
+ EC_pre_comp_free(group);
if (ctx == NULL)
if ((ctx = new_ctx = BN_CTX_new()) == NULL)
return 0;
*/
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(x_tmp, group->generator->X)) ||
(!BN_to_felem(y_tmp, group->generator->Y)) ||
}
make_points_affine(31, &(pre->g_pre_comp[0][1]), tmp_smallfelems);
- if (!EC_EX_DATA_set_data(&group->extra_data, pre, nistp256_pre_comp_dup,
- nistp256_pre_comp_free,
- nistp256_pre_comp_clear_free))
- goto err;
- ret = 1;
+ done:
+ SETPRECOMP(group, nistp256, pre);
pre = NULL;
+ ret = 1;
+
err:
BN_CTX_end(ctx);
EC_POINT_free(generator);
- if (new_ctx != NULL)
- BN_CTX_free(new_ctx);
- nistp256_pre_comp_free(pre);
+ BN_CTX_free(new_ctx);
+ EC_nistp256_pre_comp_free(pre);
return ret;
}
int ec_GFp_nistp256_have_precompute_mult(const EC_GROUP *group)
{
- if (EC_EX_DATA_get_data(group->extra_data, nistp256_pre_comp_dup,
- nistp256_pre_comp_free,
- nistp256_pre_comp_clear_free)
- != NULL)
- return 1;
- else
- return 0;
+ return HAVEPRECOMP(group, nistp256);
}
-#else
-static void *dummy = &dummy;
#endif
projects / openssl.git / blobdiff