#include <string.h>
#include "ec_lcl.h"
#include <openssl/err.h>
#include <string.h>
EC_KEY *EC_KEY_new(void)
{
EC_KEY *ret;
ret=(EC_KEY *)OPENSSL_malloc(sizeof(EC_KEY));
if (ret == NULL)
{
ECerr(EC_F_EC_KEY_NEW, ERR_R_MALLOC_FAILURE);
return(NULL);
}
ret->version = 1;
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);
}
EC_KEY *EC_KEY_new_by_curve_name(int nid)
{
EC_KEY *ret = EC_KEY_new();
if (ret == NULL)
return NULL;
ret->group = EC_GROUP_new_by_curve_name(nid);
if (ret->group == NULL)
{
EC_KEY_free(ret);
return NULL;
}
return ret;
}
void EC_KEY_free(EC_KEY *r)
{
int i;
if (r == NULL) return;
i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_EC);
#ifdef REF_PRINT
REF_PRINT("EC_KEY",r);
#endif
if (i > 0) return;
#ifdef REF_CHECK
if (i < 0)
{
fprintf(stderr,"EC_KEY_free, bad reference count\n");
abort();
}
#endif
if (r->group != NULL)
EC_GROUP_free(r->group);
if (r->pub_key != NULL)
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);
OPENSSL_cleanse((void *)r, sizeof(EC_KEY));
OPENSSL_free(r);
}
EC_KEY *EC_KEY_copy(EC_KEY *dest, const 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->group)
{
const EC_METHOD *meth = EC_GROUP_method_of(src->group);
if (dest->group)
EC_GROUP_free(dest->group);
dest->group = EC_GROUP_new(meth);
if (dest->group == NULL)
return NULL;
if (!EC_GROUP_copy(dest->group, src->group))
return NULL;
}
if (src->pub_key && src->group)
{
if (dest->pub_key)
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;
}
if (src->priv_key)
{
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;
}
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;
}
dest->enc_flag = src->enc_flag;
dest->conv_form = src->conv_form;
dest->version = src->version;
return dest;
}
EC_KEY *EC_KEY_dup(const EC_KEY *ec_key)
{
EC_KEY *ret = EC_KEY_new();
if (ret == NULL)
return NULL;
if (EC_KEY_copy(ret, ec_key) == NULL)
{
EC_KEY_free(ret);
return NULL;
}
return ret;
}
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
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)
{
ECerr(EC_F_EC_KEY_GENERATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if ((order = BN_new()) == NULL) goto err;
if ((ctx = BN_CTX_new()) == NULL) goto err;
if (eckey->priv_key == NULL)
{
priv_key = BN_new();
if (priv_key == NULL)
goto err;
}
else
priv_key = eckey->priv_key;
if (!EC_GROUP_get_order(eckey->group, order, ctx))
goto err;
do
if (!BN_rand_range(priv_key, order))
goto err;
while (BN_is_zero(priv_key));
if (eckey->pub_key == NULL)
{
pub_key = EC_POINT_new(eckey->group);
if (pub_key == NULL)
goto err;
}
else
pub_key = eckey->pub_key;
if (!EC_POINT_mul(eckey->group, pub_key, priv_key, NULL, NULL, ctx))
goto err;
eckey->priv_key = priv_key;
eckey->pub_key = pub_key;
ok=1;
err:
if (order)
BN_free(order);
if (pub_key != NULL && eckey->pub_key == NULL)
EC_POINT_free(pub_key);
if (priv_key != NULL && eckey->priv_key == NULL)
BN_free(priv_key);
if (ctx != NULL)
BN_CTX_free(ctx);
return(ok);
}
int EC_KEY_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);
return 0;
}
if ((ctx = BN_CTX_new()) == NULL)
goto err;
if ((point = EC_POINT_new(eckey->group)) == NULL)
goto err;
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);
goto err;
}
order = &eckey->group->order;
if (BN_is_zero(order))
{
ECerr(EC_F_EC_KEY_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);
goto err;
}
if (!EC_POINT_is_at_infinity(eckey->group, point))
{
ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_WRONG_ORDER);
goto err;
}
if (eckey->priv_key)
{
if (BN_cmp(eckey->priv_key, order) >= 0)
{
ECerr(EC_F_EC_KEY_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);
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);
goto err;
}
}
ok = 1;
err:
if (ctx != NULL)
BN_CTX_free(ctx);
if (point != NULL)
EC_POINT_free(point);
return(ok);
}
const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key)
{
return key->group;
}
int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group)
{
if (key->group != NULL)
EC_GROUP_free(key->group);
key->group = EC_GROUP_dup(group);
return (key->group == NULL) ? 0 : 1;
}
const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key)
{
return key->priv_key;
}
int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key)
{
if (key->priv_key)
BN_clear_free(key->priv_key);
key->priv_key = BN_dup(priv_key);
return (key->priv_key == NULL) ? 0 : 1;
}
const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key)
{
return key->pub_key;
}
int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub_key)
{
if (key->pub_key != NULL)
EC_POINT_free(key->pub_key);
key->pub_key = EC_POINT_dup(pub_key, key->group);
return (key->pub_key == NULL) ? 0 : 1;
}
unsigned int EC_KEY_get_enc_flags(const EC_KEY *key)
{
return key->enc_flag;
}
void EC_KEY_set_enc_flags(EC_KEY *key, unsigned int flags)
{
key->enc_flag = flags;
}
point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key)
{
return key->conv_form;
}
void EC_KEY_set_conv_form(EC_KEY *key, point_conversion_form_t cform)
{
key->conv_form = cform;
if (key->group != NULL)
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 *))
{
return EC_EX_DATA_get_data(key->method_data, dup_func, free_func, clear_free_func);
}
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);
}
void EC_KEY_set_asn1_flag(EC_KEY *key, int flag)
{
if (key->group != NULL)
EC_GROUP_set_asn1_flag(key->group, flag);
}
int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx)
{
if (key->group == NULL)
return 0;
return EC_GROUP_precompute_mult(key->group, ctx);
}