-/* crypto/ec/ec_key.c */
/*
* Written by Nils Larsch for the OpenSSL project.
*/
#include <string.h>
#include "ec_lcl.h"
#include <openssl/err.h>
-#ifndef OPENSSL_NO_ENGINE
-# include <openssl/engine.h>
-#endif
+#include <openssl/engine.h>
EC_KEY *EC_KEY_new(void)
{
if (r == NULL)
return;
- i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_EC);
-#ifdef REF_PRINT
- REF_PRINT("EC_KEY", r);
-#endif
+ CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
+ REF_PRINT_COUNT("EC_KEY", r);
if (i > 0)
return;
-#ifdef REF_CHECK
- if (i < 0) {
- fprintf(stderr, "EC_KEY_free, bad reference count\n");
- abort();
- }
-#endif
+ REF_ASSERT_ISNT(i < 0);
if (r->meth->finish != NULL)
r->meth->finish(r);
#ifndef OPENSSL_NO_ENGINE
- if (r->engine != NULL)
- ENGINE_finish(r->engine);
+ ENGINE_finish(r->engine);
#endif
+ if (r->group && r->group->meth->keyfinish)
+ r->group->meth->keyfinish(r);
+
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_EC_KEY, r, &r->ex_data);
+ CRYPTO_THREAD_lock_free(r->lock);
EC_GROUP_free(r->group);
EC_POINT_free(r->pub_key);
BN_clear_free(r->priv_key);
if (src->meth != dest->meth) {
if (dest->meth->finish != NULL)
dest->meth->finish(dest);
+ if (dest->group && dest->group->meth->keyfinish)
+ dest->group->meth->keyfinish(dest);
#ifndef OPENSSL_NO_ENGINE
- if (dest->engine != NULL && ENGINE_finish(dest->engine) == 0)
+ if (ENGINE_finish(dest->engine) == 0)
return 0;
dest->engine = NULL;
#endif
return NULL;
if (!EC_GROUP_copy(dest->group, src->group))
return NULL;
- }
- /* copy the public key */
- if (src->pub_key != NULL && src->group != NULL) {
- EC_POINT_free(dest->pub_key);
- dest->pub_key = EC_POINT_new(src->group);
- if (dest->pub_key == NULL)
- return NULL;
- if (!EC_POINT_copy(dest->pub_key, src->pub_key))
- return NULL;
- }
- /* copy the private key */
- if (src->priv_key != NULL) {
- if (dest->priv_key == NULL) {
- dest->priv_key = BN_new();
- if (dest->priv_key == NULL)
+
+ /* copy the public key */
+ if (src->pub_key != NULL) {
+ EC_POINT_free(dest->pub_key);
+ dest->pub_key = EC_POINT_new(src->group);
+ if (dest->pub_key == NULL)
+ return NULL;
+ if (!EC_POINT_copy(dest->pub_key, src->pub_key))
+ return NULL;
+ }
+ /* copy the private key */
+ if (src->priv_key != NULL) {
+ if (dest->priv_key == NULL) {
+ dest->priv_key = BN_new();
+ if (dest->priv_key == NULL)
+ return NULL;
+ }
+ if (!BN_copy(dest->priv_key, src->priv_key))
+ return NULL;
+ if (src->group->meth->keycopy
+ && src->group->meth->keycopy(dest, src) == 0)
return NULL;
}
- if (!BN_copy(dest->priv_key, src->priv_key))
- return NULL;
}
+
/* copy the rest */
dest->enc_flag = src->enc_flag;
dest->conv_form = src->conv_form;
if (ret == NULL)
return NULL;
+
if (EC_KEY_copy(ret, ec_key) == NULL) {
EC_KEY_free(ret);
return NULL;
int EC_KEY_up_ref(EC_KEY *r)
{
- int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_EC);
-#ifdef REF_PRINT
- REF_PRINT("EC_KEY", r);
-#endif
-#ifdef REF_CHECK
- if (i < 2) {
- fprintf(stderr, "EC_KEY_up, bad reference count\n");
- abort();
- }
-#endif
+ int i;
+
+ if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
+ return 0;
+
+ REF_PRINT_COUNT("EC_KEY", r);
+ REF_ASSERT_ISNT(i < 2);
return ((i > 1) ? 1 : 0);
}
}
int ossl_ec_key_gen(EC_KEY *eckey)
+{
+ OPENSSL_assert(eckey->group->meth->keygen != NULL);
+ return eckey->group->meth->keygen(eckey);
+}
+
+int ec_key_simple_generate_key(EC_KEY *eckey)
{
int ok = 0;
BN_CTX *ctx = NULL;
- BIGNUM *priv_key = NULL, *order = NULL;
+ BIGNUM *priv_key = NULL;
+ const BIGNUM *order = NULL;
EC_POINT *pub_key = NULL;
- if ((order = BN_new()) == NULL)
- goto err;
if ((ctx = BN_CTX_new()) == NULL)
goto err;
} else
priv_key = eckey->priv_key;
- if (!EC_GROUP_get_order(eckey->group, order, ctx))
+ order = EC_GROUP_get0_order(eckey->group);
+ if (order == NULL)
goto err;
do
ok = 1;
err:
- BN_free(order);
if (eckey->pub_key == NULL)
EC_POINT_free(pub_key);
if (eckey->priv_key != priv_key)
BN_free(priv_key);
BN_CTX_free(ctx);
- return (ok);
+ return ok;
+}
+
+int ec_key_simple_generate_public_key(EC_KEY *eckey)
+{
+ return EC_POINT_mul(eckey->group, eckey->pub_key, eckey->priv_key, NULL,
+ NULL, NULL);
}
int EC_KEY_check_key(const EC_KEY *eckey)
+{
+ if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) {
+ ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ if (eckey->group->meth->keycheck == NULL) {
+ ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+
+ return eckey->group->meth->keycheck(eckey);
+}
+
+int ec_key_simple_check_key(const EC_KEY *eckey)
{
int ok = 0;
BN_CTX *ctx = NULL;
EC_POINT *point = NULL;
if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
+ ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key)) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_AT_INFINITY);
+ ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_AT_INFINITY);
goto err;
}
/* testing whether the pub_key is on the elliptic curve */
if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE);
+ ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE);
goto err;
}
/* testing whether pub_key * order is the point at infinity */
order = eckey->group->order;
if (BN_is_zero(order)) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_INVALID_GROUP_ORDER);
+ ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_GROUP_ORDER);
goto err;
}
if (!EC_POINT_mul(eckey->group, point, NULL, eckey->pub_key, order, ctx)) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_EC_LIB);
+ ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB);
goto err;
}
if (!EC_POINT_is_at_infinity(eckey->group, point)) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_WRONG_ORDER);
+ ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER);
goto err;
}
/*
*/
if (eckey->priv_key != NULL) {
if (BN_cmp(eckey->priv_key, order) >= 0) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_WRONG_ORDER);
+ ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_WRONG_ORDER);
goto err;
}
if (!EC_POINT_mul(eckey->group, point, eckey->priv_key,
NULL, NULL, ctx)) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_EC_LIB);
+ ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, ERR_R_EC_LIB);
goto err;
}
if (EC_POINT_cmp(eckey->group, point, eckey->pub_key, ctx) != 0) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_INVALID_PRIVATE_KEY);
+ ECerr(EC_F_EC_KEY_SIMPLE_CHECK_KEY, EC_R_INVALID_PRIVATE_KEY);
goto err;
}
}
err:
BN_CTX_free(ctx);
EC_POINT_free(point);
- return (ok);
+ return ok;
}
int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x,
int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key)
{
+ if (key->group == NULL || key->group->meth == NULL)
+ return 0;
+ if (key->group->meth->set_private != NULL
+ && key->group->meth->set_private(key, priv_key) == 0)
+ return 0;
if (key->meth->set_private != NULL
&& key->meth->set_private(key, priv_key) == 0)
return 0;
key->pub_key = EC_POINT_new(key->group);
if (key->pub_key == NULL)
return 0;
- return EC_POINT_oct2point(key->group, key->pub_key, buf, len, ctx);
+ if (EC_POINT_oct2point(key->group, key->pub_key, buf, len, ctx) == 0)
+ return 0;
+ /*
+ * Save the point conversion form.
+ * For non-custom curves the first octet of the buffer (excluding
+ * the last significant bit) contains the point conversion form.
+ * EC_POINT_oct2point() has already performed sanity checking of
+ * the buffer so we know it is valid.
+ */
+ if ((key->group->meth->flags & EC_FLAGS_CUSTOM_CURVE) == 0)
+ key->conv_form = (point_conversion_form_t)(buf[0] & ~0x01);
+ return 1;
+}
+
+size_t EC_KEY_priv2oct(const EC_KEY *eckey, unsigned char *buf, size_t len)
+{
+ if (eckey->group == NULL || eckey->group->meth == NULL)
+ return 0;
+ if (eckey->group->meth->priv2oct == NULL) {
+ ECerr(EC_F_EC_KEY_PRIV2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+
+ return eckey->group->meth->priv2oct(eckey, buf, len);
+}
+
+size_t ec_key_simple_priv2oct(const EC_KEY *eckey,
+ unsigned char *buf, size_t len)
+{
+ size_t buf_len;
+
+ buf_len = (EC_GROUP_order_bits(eckey->group) + 7) / 8;
+ if (eckey->priv_key == NULL)
+ return 0;
+ if (buf == NULL)
+ return buf_len;
+ else if (len < buf_len)
+ return 0;
+
+ /* Octetstring may need leading zeros if BN is to short */
+
+ if (BN_bn2binpad(eckey->priv_key, buf, buf_len) == -1) {
+ ECerr(EC_F_EC_KEY_SIMPLE_PRIV2OCT, EC_R_BUFFER_TOO_SMALL);
+ return 0;
+ }
+
+ return buf_len;
+}
+
+int EC_KEY_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len)
+{
+ if (eckey->group == NULL || eckey->group->meth == NULL)
+ return 0;
+ if (eckey->group->meth->oct2priv == NULL) {
+ ECerr(EC_F_EC_KEY_OCT2PRIV, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ return eckey->group->meth->oct2priv(eckey, buf, len);
+}
+
+int ec_key_simple_oct2priv(EC_KEY *eckey, unsigned char *buf, size_t len)
+{
+ if (eckey->priv_key == NULL)
+ eckey->priv_key = BN_secure_new();
+ if (eckey->priv_key == NULL) {
+ ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ eckey->priv_key = BN_bin2bn(buf, len, eckey->priv_key);
+ if (eckey->priv_key == NULL) {
+ ECerr(EC_F_EC_KEY_SIMPLE_OCT2PRIV, ERR_R_BN_LIB);
+ return 0;
+ }
+ return 1;
+}
+
+size_t EC_KEY_priv2buf(const EC_KEY *eckey, unsigned char **pbuf)
+{
+ size_t len;
+ unsigned char *buf;
+ len = EC_KEY_priv2oct(eckey, NULL, 0);
+ if (len == 0)
+ return 0;
+ buf = OPENSSL_malloc(len);
+ if (buf == NULL)
+ return 0;
+ len = EC_KEY_priv2oct(eckey, buf, len);
+ if (len == 0) {
+ OPENSSL_free(buf);
+ return 0;
+ }
+ *pbuf = buf;
+ return len;
+}
+
+int EC_KEY_can_sign(const EC_KEY *eckey)
+{
+ if (eckey->group == NULL || eckey->group->meth == NULL
+ || (eckey->group->meth->flags & EC_FLAGS_NO_SIGN))
+ return 0;
+ return 1;
}