-/* crypto/ec/ec_key.c */
/*
* Written by Nils Larsch for the OpenSSL project.
*/
* contributed to the OpenSSL project.
*/
+#include <internal/cryptlib.h>
#include <string.h>
#include "ec_lcl.h"
#include <openssl/err.h>
+#ifndef OPENSSL_NO_ENGINE
+# include <openssl/engine.h>
+#endif
EC_KEY *EC_KEY_new(void)
{
- EC_KEY *ret;
-
- ret = OPENSSL_malloc(sizeof(EC_KEY));
- if (ret == NULL) {
- ECerr(EC_F_EC_KEY_NEW, ERR_R_MALLOC_FAILURE);
- return (NULL);
- }
-
- ret->version = 1;
- ret->flags = 0;
- ret->group = NULL;
- ret->pub_key = NULL;
- ret->priv_key = NULL;
- ret->enc_flag = 0;
- ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
- ret->references = 1;
- ret->method_data = NULL;
- return (ret);
+ return EC_KEY_new_method(NULL);
}
EC_KEY *EC_KEY_new_by_curve_name(int nid)
EC_KEY_free(ret);
return NULL;
}
+ if (ret->meth->set_group != NULL
+ && ret->meth->set_group(ret, ret->group) == 0) {
+ EC_KEY_free(ret);
+ return NULL;
+ }
return ret;
}
return;
i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_EC);
-#ifdef REF_PRINT
- REF_PRINT("EC_KEY", r);
-#endif
+ 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();
- }
+ REF_ASSERT_ISNT(i < 0);
+
+ if (r->meth->finish != NULL)
+ r->meth->finish(r);
+
+#ifndef OPENSSL_NO_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);
EC_GROUP_free(r->group);
EC_POINT_free(r->pub_key);
- if (r->priv_key != NULL)
- BN_clear_free(r->priv_key);
-
- EC_EX_DATA_free_all_data(&r->method_data);
+ BN_clear_free(r->priv_key);
OPENSSL_clear_free((void *)r, sizeof(EC_KEY));
}
-EC_KEY *EC_KEY_copy(EC_KEY *dest, const EC_KEY *src)
+EC_KEY *EC_KEY_copy(EC_KEY *dest, EC_KEY *src)
{
- EC_EXTRA_DATA *d;
-
if (dest == NULL || src == NULL) {
ECerr(EC_F_EC_KEY_COPY, ERR_R_PASSED_NULL_PARAMETER);
return NULL;
}
+ 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 (ENGINE_finish(dest->engine) == 0)
+ return 0;
+ dest->engine = NULL;
+#endif
+ }
/* copy the parameters */
- if (src->group) {
+ if (src->group != NULL) {
const EC_METHOD *meth = EC_GROUP_method_of(src->group);
/* clear the old group */
EC_GROUP_free(dest->group);
return NULL;
}
/* copy the public key */
- if (src->pub_key && src->group) {
+ 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;
}
/* copy the private key */
- if (src->priv_key) {
+ if (src->priv_key != NULL) {
if (dest->priv_key == NULL) {
dest->priv_key = BN_new();
if (dest->priv_key == 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;
}
- /* copy method/extra data */
- EC_EX_DATA_free_all_data(&dest->method_data);
-
- for (d = src->method_data; d != NULL; d = d->next) {
- void *t = d->dup_func(d->data);
- if (t == NULL)
- return 0;
- if (!EC_EX_DATA_set_data
- (&dest->method_data, t, d->dup_func, d->free_func,
- d->clear_free_func))
- return 0;
- }
/* copy the rest */
dest->enc_flag = src->enc_flag;
dest->conv_form = src->conv_form;
dest->version = src->version;
dest->flags = src->flags;
+ if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_EC_KEY,
+ &dest->ex_data, &src->ex_data))
+ return NULL;
+
+ if (src->meth != dest->meth) {
+#ifndef OPENSSL_NO_ENGINE
+ if (src->engine != NULL && ENGINE_init(src->engine) == 0)
+ return NULL;
+ dest->engine = src->engine;
+#endif
+ dest->meth = src->meth;
+ }
+
+ if (src->meth->copy != NULL && src->meth->copy(dest, src) == 0)
+ return NULL;
return dest;
}
-EC_KEY *EC_KEY_dup(const EC_KEY *ec_key)
+EC_KEY *EC_KEY_dup(EC_KEY *ec_key)
{
- EC_KEY *ret = EC_KEY_new();
+ EC_KEY *ret = EC_KEY_new_method(ec_key->engine);
+
if (ret == NULL)
return NULL;
if (EC_KEY_copy(ret, ec_key) == 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
+
+ REF_PRINT_COUNT("EC_KEY", r);
+ REF_ASSERT_ISNT(i < 2);
return ((i > 1) ? 1 : 0);
}
int EC_KEY_generate_key(EC_KEY *eckey)
{
- int ok = 0;
- BN_CTX *ctx = NULL;
- BIGNUM *priv_key = NULL, *order = NULL;
- EC_POINT *pub_key = NULL;
-
- if (!eckey || !eckey->group) {
+ if (eckey == NULL || eckey->group == NULL) {
ECerr(EC_F_EC_KEY_GENERATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
+ if (eckey->meth->keygen != NULL)
+ return eckey->meth->keygen(eckey);
+ ECerr(EC_F_EC_KEY_GENERATE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
+ return 0;
+}
+
+int ossl_ec_key_gen(EC_KEY *eckey)
+{
+ if (eckey->group->meth->keygen == NULL) {
+ ECerr(EC_F_OSSL_EC_KEY_GEN, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+
+ 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;
+ 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:
- if (order)
- BN_free(order);
if (eckey->pub_key == NULL)
EC_POINT_free(pub_key);
- if (priv_key != NULL && eckey->priv_key == NULL)
+ if (eckey->priv_key != priv_key)
BN_free(priv_key);
- if (ctx != NULL)
- BN_CTX_free(ctx);
- return (ok);
+ BN_CTX_free(ctx);
+ 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;
const BIGNUM *order = NULL;
EC_POINT *point = NULL;
- if (!eckey || !eckey->group || !eckey->pub_key) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, ERR_R_PASSED_NULL_PARAMETER);
+ if (eckey == NULL || eckey->group == NULL || eckey->pub_key == NULL) {
+ 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;
}
goto err;
/* testing whether the pub_key is on the elliptic curve */
- if (!EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx)) {
- ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE);
+ if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) {
+ 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;
}
/*
* in case the priv_key is present : check if generator * priv_key ==
* pub_key
*/
- if (eckey->priv_key) {
+ 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;
}
}
ok = 1;
err:
- if (ctx != NULL)
- BN_CTX_free(ctx);
+ 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,
BN_CTX *ctx = NULL;
BIGNUM *tx, *ty;
EC_POINT *point = NULL;
- int ok = 0, tmp_nid, is_char_two = 0;
+ int ok = 0;
+#ifndef OPENSSL_NO_EC2M
+ int tmp_nid, is_char_two = 0;
+#endif
- if (!key || !key->group || !x || !y) {
+ if (key == NULL || key->group == NULL || x == NULL || y == NULL) {
ECerr(EC_F_EC_KEY_SET_PUBLIC_KEY_AFFINE_COORDINATES,
ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
ctx = BN_CTX_new();
- if (!ctx)
+ if (ctx == NULL)
goto err;
point = EC_POINT_new(key->group);
- if (!point)
+ if (point == NULL)
+ goto err;
+
+ tx = BN_CTX_get(ctx);
+ ty = BN_CTX_get(ctx);
+ if (ty == NULL)
goto err;
+#ifndef OPENSSL_NO_EC2M
tmp_nid = EC_METHOD_get_field_type(EC_GROUP_method_of(key->group));
if (tmp_nid == NID_X9_62_characteristic_two_field)
is_char_two = 1;
- tx = BN_CTX_get(ctx);
- ty = BN_CTX_get(ctx);
-#ifndef OPENSSL_NO_EC2M
if (is_char_two) {
if (!EC_POINT_set_affine_coordinates_GF2m(key->group, point,
x, y, ctx))
ok = 1;
err:
- if (ctx)
- BN_CTX_free(ctx);
+ BN_CTX_free(ctx);
EC_POINT_free(point);
return ok;
int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group)
{
+ if (key->meth->set_group != NULL && key->meth->set_group(key, group) == 0)
+ return 0;
EC_GROUP_free(key->group);
key->group = EC_GROUP_dup(group);
return (key->group == NULL) ? 0 : 1;
int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key)
{
- if (key->priv_key)
- BN_clear_free(key->priv_key);
+ if (key->group == NULL || key->group->meth == NULL)
+ return 0;
+ if (key->group->meth->set_private
+ && key->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;
+ BN_clear_free(key->priv_key);
key->priv_key = BN_dup(priv_key);
return (key->priv_key == NULL) ? 0 : 1;
}
int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub_key)
{
+ if (key->meth->set_public != NULL
+ && key->meth->set_public(key, pub_key) == 0)
+ return 0;
EC_POINT_free(key->pub_key);
key->pub_key = EC_POINT_dup(pub_key, key->group);
return (key->pub_key == NULL) ? 0 : 1;
EC_GROUP_set_point_conversion_form(key->group, cform);
}
-void *EC_KEY_get_key_method_data(EC_KEY *key,
- void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *))
-{
- void *ret;
-
- CRYPTO_r_lock(CRYPTO_LOCK_EC);
- ret =
- EC_EX_DATA_get_data(key->method_data, dup_func, free_func,
- clear_free_func);
- CRYPTO_r_unlock(CRYPTO_LOCK_EC);
-
- return ret;
-}
-
-void *EC_KEY_insert_key_method_data(EC_KEY *key, void *data,
- void *(*dup_func) (void *),
- void (*free_func) (void *),
- void (*clear_free_func) (void *))
-{
- EC_EXTRA_DATA *ex_data;
-
- CRYPTO_w_lock(CRYPTO_LOCK_EC);
- ex_data =
- EC_EX_DATA_get_data(key->method_data, dup_func, free_func,
- clear_free_func);
- if (ex_data == NULL)
- EC_EX_DATA_set_data(&key->method_data, data, dup_func, free_func,
- clear_free_func);
- CRYPTO_w_unlock(CRYPTO_LOCK_EC);
-
- return ex_data;
-}
-
void EC_KEY_set_asn1_flag(EC_KEY *key, int flag)
{
if (key->group != NULL)
{
key->flags &= ~flags;
}
+
+size_t EC_KEY_key2buf(const EC_KEY *key, point_conversion_form_t form,
+ unsigned char **pbuf, BN_CTX *ctx)
+{
+ if (key == NULL || key->pub_key == NULL || key->group == NULL)
+ return 0;
+ return EC_POINT_point2buf(key->group, key->pub_key, form, pbuf, ctx);
+}
+
+int EC_KEY_oct2key(EC_KEY *key, const unsigned char *buf, size_t len,
+ BN_CTX *ctx)
+{
+ if (key == NULL || key->group == NULL)
+ return 0;
+ if (key->pub_key == NULL)
+ key->pub_key = EC_POINT_new(key->group);
+ if (key->pub_key == NULL)
+ return 0;
+ 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_get_degree(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;
+}
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