#include <openssl/core_names.h>
#include <openssl/bn.h>
#include <openssl/objects.h>
-#include <openssl/params.h>
#include "crypto/bn.h"
#include "crypto/ec.h"
-#include "internal/param_build.h"
#include "prov/implementations.h"
#include "prov/providercommon.h"
#include "prov/provider_ctx.h"
+#include "internal/param_build_set.h"
static OSSL_OP_keymgmt_new_fn ec_newdata;
static OSSL_OP_keymgmt_free_fn ec_freedata;
static OSSL_OP_keymgmt_export_types_fn ec_export_types;
static OSSL_OP_keymgmt_query_operation_name_fn ec_query_operation_name;
-#define EC_POSSIBLE_SELECTIONS \
- (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_ALL_PARAMETERS )
+#define EC_POSSIBLE_SELECTIONS \
+ (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_ALL_PARAMETERS)
static
const char *ec_query_operation_name(int operation_id)
switch (operation_id) {
case OSSL_OP_KEYEXCH:
return "ECDH";
-#if 0
case OSSL_OP_SIGNATURE:
- return deflt_signature;
-#endif
+ return "ECDSA";
}
return NULL;
}
static ossl_inline
-int params_to_domparams(EC_KEY *ec, const OSSL_PARAM params[])
-{
- const OSSL_PARAM *param_ec_name;
- EC_GROUP *ecg = NULL;
- char *curve_name = NULL;
- int ok = 0;
-
- if (ec == NULL)
- return 0;
-
- param_ec_name = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_NAME);
- if (param_ec_name == NULL) {
- /* explicit parameters */
-
- /*
- * TODO(3.0): should we support explicit parameters curves?
- */
- return 0;
- } else {
- /* named curve */
- int curve_nid;
-
- if (!OSSL_PARAM_get_utf8_string(param_ec_name, &curve_name, 0)
- || curve_name == NULL
- || (curve_nid = ec_curve_name2nid(curve_name)) == NID_undef)
- goto err;
-
- if ((ecg = EC_GROUP_new_by_curve_name_ex(ec_key_get_libctx(ec),
- curve_nid)) == NULL)
- goto err;
- }
-
- if (!EC_KEY_set_group(ec, ecg))
- goto err;
-
- /*
- * TODO(3.0): if the group has changed, should we invalidate the private and
- * public key?
- */
-
- ok = 1;
-
- err:
- OPENSSL_free(curve_name);
- EC_GROUP_free(ecg);
- return ok;
-}
-
-static ossl_inline
-int domparams_to_params(const EC_KEY *ec, OSSL_PARAM_BLD *tmpl)
+int domparams_to_params(const EC_KEY *ec, OSSL_PARAM_BLD *tmpl,
+ OSSL_PARAM params[])
{
const EC_GROUP *ecg;
int curve_nid;
curve_nid = EC_GROUP_get_curve_name(ecg);
if (curve_nid == NID_undef) {
- /* explicit parameters */
-
- /*
- * TODO(3.0): should we support explicit parameters curves?
- */
+ /* TODO(3.0): should we support explicit parameters curves? */
return 0;
} else {
/* named curve */
if ((curve_name = ec_curve_nid2name(curve_nid)) == NULL)
return 0;
+ if (!ossl_param_build_set_utf8_string(tmpl, params,
+ OSSL_PKEY_PARAM_EC_NAME,
+ curve_name))
- if (!ossl_param_bld_push_utf8_string(tmpl, OSSL_PKEY_PARAM_EC_NAME, curve_name, 0))
return 0;
}
return 1;
}
-/*
- * Callers of params_to_key MUST make sure that params_to_domparams has been
- * called before!
- *
- * This function only imports the bare keypair, domain parameters and other
- * parameters are imported separately, and domain parameters are required to
- * define a keypair.
- */
-static ossl_inline
-int params_to_key(EC_KEY *ec, const OSSL_PARAM params[], int include_private)
-{
- const OSSL_PARAM *param_priv_key, *param_pub_key;
- BN_CTX *ctx = NULL;
- BIGNUM *priv_key = NULL;
- unsigned char *pub_key = NULL;
- size_t pub_key_len;
- const EC_GROUP *ecg = NULL;
- EC_POINT *pub_point = NULL;
- int ok = 0;
-
- ecg = EC_KEY_get0_group(ec);
- if (ecg == NULL)
- return 0;
-
- param_priv_key =
- OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
- param_pub_key =
- OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
-
- ctx = BN_CTX_new_ex(ec_key_get_libctx(ec));
- if (ctx == NULL)
- goto err;
- /*
- * We want to have at least a public key either way, so we end up
- * requiring it unconditionally.
- */
- if (param_pub_key == NULL
- || !OSSL_PARAM_get_octet_string(param_pub_key,
- (void **)&pub_key, 0, &pub_key_len)
- || (pub_point = EC_POINT_new(ecg)) == NULL
- || !EC_POINT_oct2point(ecg, pub_point,
- pub_key, pub_key_len, ctx))
- goto err;
-
- if (param_priv_key != NULL && include_private) {
- int fixed_top;
- const BIGNUM *order;
-
- /*
- * Key import/export should never leak the bit length of the secret
- * scalar in the key.
- *
- * For this reason, on export we use padded BIGNUMs with fixed length.
- *
- * When importing we also should make sure that, even if short lived,
- * the newly created BIGNUM is marked with the BN_FLG_CONSTTIME flag as
- * soon as possible, so that any processing of this BIGNUM might opt for
- * constant time implementations in the backend.
- *
- * Setting the BN_FLG_CONSTTIME flag alone is never enough, we also have
- * to preallocate the BIGNUM internal buffer to a fixed public size big
- * enough that operations performed during the processing never trigger
- * a realloc which would leak the size of the scalar through memory
- * accesses.
- *
- * Fixed Length
- * ------------
- *
- * The order of the large prime subgroup of the curve is our choice for
- * a fixed public size, as that is generally the upper bound for
- * generating a private key in EC cryptosystems and should fit all valid
- * secret scalars.
- *
- * For padding on export we just use the bit length of the order
- * converted to bytes (rounding up).
- *
- * For preallocating the BIGNUM storage we look at the number of "words"
- * required for the internal representation of the order, and we
- * preallocate 2 extra "words" in case any of the subsequent processing
- * might temporarily overflow the order length.
- */
- order = EC_GROUP_get0_order(ecg);
- if (order == NULL || BN_is_zero(order))
- goto err;
-
- fixed_top = bn_get_top(order) + 2;
-
- if ((priv_key = BN_secure_new()) == NULL)
- goto err;
- if (bn_wexpand(priv_key, fixed_top) == NULL)
- goto err;
- BN_set_flags(priv_key, BN_FLG_CONSTTIME);
-
- if (!OSSL_PARAM_get_BN(param_priv_key, &priv_key))
- goto err;
- }
-
- if (priv_key != NULL
- && !EC_KEY_set_private_key(ec, priv_key))
- goto err;
-
- if (!EC_KEY_set_public_key(ec, pub_point))
- goto err;
-
- ok = 1;
-
- err:
- BN_CTX_free(ctx);
- BN_clear_free(priv_key);
- OPENSSL_free(pub_key);
- EC_POINT_free(pub_point);
- return ok;
-}
-
/*
* Callers of key_to_params MUST make sure that domparams_to_params is also
* called!
* parameters are exported separately.
*/
static ossl_inline
-int key_to_params(const EC_KEY *eckey, OSSL_PARAM_BLD *tmpl, int include_private)
+int key_to_params(const EC_KEY *eckey, OSSL_PARAM_BLD *tmpl,
+ OSSL_PARAM params[], int include_private,
+ unsigned char **pub_key)
{
const BIGNUM *priv_key = NULL;
const EC_POINT *pub_point = NULL;
const EC_GROUP *ecg = NULL;
- unsigned char *pub_key = NULL;
size_t pub_key_len = 0;
int ret = 0;
- if (eckey == NULL)
+ if (eckey == NULL
+ || (ecg = EC_KEY_get0_group(eckey)) == NULL)
return 0;
- ecg = EC_KEY_get0_group(eckey);
priv_key = EC_KEY_get0_private_key(eckey);
pub_point = EC_KEY_get0_public_key(eckey);
- /* group and public_key must be present, priv_key is optional */
- if (ecg == NULL || pub_point == NULL)
- return 0;
- if ((pub_key_len = EC_POINT_point2buf(ecg, pub_point,
- POINT_CONVERSION_COMPRESSED,
- &pub_key, NULL)) == 0)
- return 0;
-
- if (!ossl_param_bld_push_octet_string(tmpl,
- OSSL_PKEY_PARAM_PUB_KEY,
- pub_key, pub_key_len))
- goto err;
+ if (pub_point != NULL) {
+ /* convert pub_point to a octet string according to the SECG standard */
+ if ((pub_key_len = EC_POINT_point2buf(ecg, pub_point,
+ POINT_CONVERSION_COMPRESSED,
+ pub_key, NULL)) == 0
+ || !ossl_param_build_set_octet_string(tmpl, params,
+ OSSL_PKEY_PARAM_PUB_KEY,
+ *pub_key, pub_key_len))
+ goto err;
+ }
if (priv_key != NULL && include_private) {
size_t sz;
if (ecbits <= 0)
goto err;
sz = (ecbits + 7 ) / 8;
- if (!ossl_param_bld_push_BN_pad(tmpl,
- OSSL_PKEY_PARAM_PRIV_KEY,
- priv_key, sz))
+
+ if (!ossl_param_build_set_bn_pad(tmpl, params,
+ OSSL_PKEY_PARAM_PRIV_KEY,
+ priv_key, sz))
goto err;
}
-
ret = 1;
-
err:
- OPENSSL_free(pub_key);
return ret;
}
static ossl_inline
-int ec_set_param_ecdh_cofactor_mode(EC_KEY *ec, const OSSL_PARAM *p)
-{
- const EC_GROUP *ecg = EC_KEY_get0_group(ec);
- const BIGNUM *cofactor;
- int mode;
-
- if (!OSSL_PARAM_get_int(p, &mode))
- return 0;
-
- /*
- * mode can be only 0 for disable, or 1 for enable here.
- *
- * This is in contrast with the same parameter on an ECDH EVP_PKEY_CTX that
- * also supports mode == -1 with the meaning of "reset to the default for
- * the associated key".
- */
- if (mode < 0 || mode > 1)
- return 0;
-
- if ((cofactor = EC_GROUP_get0_cofactor(ecg)) == NULL )
- return 0;
-
- /* ECDH cofactor mode has no effect if cofactor is 1 */
- if (BN_is_one(cofactor))
- return 1;
-
- if (mode == 1)
- EC_KEY_set_flags(ec, EC_FLAG_COFACTOR_ECDH);
- else if (mode == 0)
- EC_KEY_clear_flags(ec, EC_FLAG_COFACTOR_ECDH);
-
- return 1;
-}
-
-static ossl_inline
-int params_to_otherparams(EC_KEY *ec, const OSSL_PARAM params[])
-{
- const OSSL_PARAM *p;
-
- if (ec == NULL)
- return 0;
-
- p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_USE_COFACTOR_ECDH);
- if (p != NULL && !ec_set_param_ecdh_cofactor_mode(ec, p))
- return 0;
-
- return 1;
-}
-
-static ossl_inline
-int otherparams_to_params(const EC_KEY *ec, OSSL_PARAM_BLD *tmpl)
+int otherparams_to_params(const EC_KEY *ec, OSSL_PARAM_BLD *tmpl,
+ OSSL_PARAM params[])
{
int ecdh_cofactor_mode = 0;
ecdh_cofactor_mode =
(EC_KEY_get_flags(ec) & EC_FLAG_COFACTOR_ECDH) ? 1 : 0;
- if (!ossl_param_bld_push_int(tmpl,
- OSSL_PKEY_PARAM_USE_COFACTOR_ECDH,
- ecdh_cofactor_mode))
- return 0;
-
- return 1;
+ return ossl_param_build_set_int(tmpl, params,
+ OSSL_PKEY_PARAM_USE_COFACTOR_ECDH,
+ ecdh_cofactor_mode);
}
static
EC_KEY *ec = keydata;
int ok = 0;
- if ((selection & EC_POSSIBLE_SELECTIONS) != 0)
- ok = 1;
-
- if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
- ok = ok && (EC_KEY_get0_public_key(ec) != NULL);
- if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
- ok = ok && (EC_KEY_get0_private_key(ec) != NULL);
- if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
- ok = ok && (EC_KEY_get0_group(ec) != NULL);
- /*
- * We consider OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS to always be available,
- * so no extra check is needed other than the previous one against
- * EC_POSSIBLE_SELECTIONS.
- */
+ if (ec != NULL) {
+ if ((selection & EC_POSSIBLE_SELECTIONS) != 0)
+ ok = 1;
+ if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
+ ok = ok && (EC_KEY_get0_public_key(ec) != NULL);
+ if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
+ ok = ok && (EC_KEY_get0_private_key(ec) != NULL);
+ if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
+ ok = ok && (EC_KEY_get0_group(ec) != NULL);
+ /*
+ * We consider OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS to always be
+ * available, so no extra check is needed other than the previous one
+ * against EC_POSSIBLE_SELECTIONS.
+ */
+ }
return ok;
}
return 0;
if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
- ok = ok && params_to_domparams(ec, params);
+ ok = ok && ec_key_domparams_fromdata(ec, params);
if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
int include_private =
selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
- ok = ok && params_to_key(ec, params, include_private);
+ ok = ok && ec_key_fromdata(ec, params, include_private);
}
if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
- ok = ok && params_to_otherparams(ec, params);
+ ok = ok && ec_key_otherparams_fromdata(ec, params);
return ok;
}
void *cbarg)
{
EC_KEY *ec = keydata;
- OSSL_PARAM_BLD tmpl;
+ OSSL_PARAM_BLD *tmpl;
OSSL_PARAM *params = NULL;
+ unsigned char *pub_key = NULL;
int ok = 1;
if (ec == NULL)
&& (selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
return 0;
- ossl_param_bld_init(&tmpl);
+ tmpl = OSSL_PARAM_BLD_new();
+ if (tmpl == NULL)
+ return 0;
if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
- ok = ok && domparams_to_params(ec, &tmpl);
+ ok = ok && domparams_to_params(ec, tmpl, NULL);
+
if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
int include_private =
selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY ? 1 : 0;
- ok = ok && key_to_params(ec, &tmpl, include_private);
+ ok = ok && key_to_params(ec, tmpl, NULL, include_private, &pub_key);
}
if ((selection & OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS) != 0)
- ok = ok && otherparams_to_params(ec, &tmpl);
+ ok = ok && otherparams_to_params(ec, tmpl, NULL);
if (!ok
- || (params = ossl_param_bld_to_param(&tmpl)) == NULL)
- return 0;
+ || (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
+ goto err;
ok = param_cb(params, cbarg);
- ossl_param_bld_free(params);
+ OSSL_PARAM_BLD_free_params(params);
+err:
+ OSSL_PARAM_BLD_free(tmpl);
+ OPENSSL_free(pub_key);
return ok;
}
static
int ec_get_params(void *key, OSSL_PARAM params[])
{
+ int ret;
EC_KEY *eck = key;
const EC_GROUP *ecg = NULL;
OSSL_PARAM *p;
+ unsigned char *pub_key = NULL;
ecg = EC_KEY_get0_group(eck);
if (ecg == NULL)
if (!OSSL_PARAM_set_int(p, ecdh_cofactor_mode))
return 0;
}
-
- return 1;
+ ret = domparams_to_params(eck, NULL, params)
+ && key_to_params(eck, NULL, params, 1, &pub_key)
+ && otherparams_to_params(eck, NULL, params);
+ OPENSSL_free(pub_key);
+ return ret;
}
static const OSSL_PARAM ec_known_gettable_params[] = {
OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
- OSSL_PARAM_int(OSSL_PKEY_PARAM_USE_COFACTOR_ECDH, NULL),
+ EC_IMEXPORTABLE_DOM_PARAMETERS,
+ EC_IMEXPORTABLE_PUBLIC_KEY,
+ EC_IMEXPORTABLE_PRIVATE_KEY,
+ EC_IMEXPORTABLE_OTHER_PARAMETERS,
OSSL_PARAM_END
};
projects / openssl.git / blobdiff