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Hakase
2020-04-15 18:45:34 +09:00
parent be29e7bcc6
commit 2015c00c43
573 changed files with 22943 additions and 6714 deletions
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providers/implementations/keymgmt/ec_kmgmt.c
+310 -284
View File
@@ -16,15 +16,25 @@
#include <openssl/core_numbers.h>
#include <openssl/core_names.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/err.h>
#include <openssl/objects.h>
#include <openssl/params.h>
#include "crypto/bn.h"
#include "internal/param_build.h"
#include "crypto/ec.h"
#include "prov/implementations.h"
#include "prov/providercommon.h"
#include "prov/providercommonerr.h"
#include "prov/provider_ctx.h"
#include "internal/param_build_set.h"
static OSSL_OP_keymgmt_new_fn ec_newdata;
static OSSL_OP_keymgmt_gen_init_fn ec_gen_init;
static OSSL_OP_keymgmt_gen_set_template_fn ec_gen_set_template;
static OSSL_OP_keymgmt_gen_set_params_fn ec_gen_set_params;
static OSSL_OP_keymgmt_gen_settable_params_fn ec_gen_settable_params;
static OSSL_OP_keymgmt_gen_get_params_fn ec_gen_get_params;
static OSSL_OP_keymgmt_gen_gettable_params_fn ec_gen_gettable_params;
static OSSL_OP_keymgmt_gen_fn ec_gen;
static OSSL_OP_keymgmt_gen_cleanup_fn ec_gen_cleanup;
static OSSL_OP_keymgmt_free_fn ec_freedata;
static OSSL_OP_keymgmt_get_params_fn ec_get_params;
static OSSL_OP_keymgmt_gettable_params_fn ec_gettable_params;
@@ -32,14 +42,15 @@ static OSSL_OP_keymgmt_set_params_fn ec_set_params;
static OSSL_OP_keymgmt_settable_params_fn ec_settable_params;
static OSSL_OP_keymgmt_has_fn ec_has;
static OSSL_OP_keymgmt_match_fn ec_match;
static OSSL_OP_keymgmt_validate_fn ec_validate;
static OSSL_OP_keymgmt_import_fn ec_import;
static OSSL_OP_keymgmt_import_types_fn ec_import_types;
static OSSL_OP_keymgmt_export_fn ec_export;
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)
@@ -47,64 +58,15 @@ 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 = OBJ_sn2nid(curve_name)) == NID_undef)
goto err;
if ((ecg = EC_GROUP_new_by_curve_name(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;
@@ -119,135 +81,24 @@ int domparams_to_params(const EC_KEY *ec, OSSL_PARAM_BLD *tmpl)
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 */
const char *curve_name = NULL;
if ((curve_name = OBJ_nid2sn(curve_nid)) == NULL)
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;
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);
/*
* 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, NULL))
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_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_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!
@@ -256,34 +107,33 @@ int params_to_key(EC_KEY *ec, const OSSL_PARAM params[], int include_private)
* 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;
@@ -326,71 +176,20 @@ int key_to_params(const EC_KEY *eckey, OSSL_PARAM_BLD *tmpl, int include_private
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;
@@ -399,18 +198,15 @@ int otherparams_to_params(const EC_KEY *ec, OSSL_PARAM_BLD *tmpl)
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
void *ec_newdata(void *provctx)
{
return EC_KEY_new();
return EC_KEY_new_ex(PROV_LIBRARY_CONTEXT_OF(provctx));
}
static
@@ -425,21 +221,22 @@ int ec_has(void *keydata, int selection)
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;
}
@@ -501,15 +298,15 @@ int ec_import(void *keydata, int selection, const OSSL_PARAM params[])
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;
}
@@ -519,8 +316,9 @@ int ec_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
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)
@@ -548,25 +346,28 @@ int ec_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
&& (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;
if (ok && (params = OSSL_PARAM_BLD_to_param(tmpl)) != NULL)
ok = param_cb(params, cbarg);
ok = param_cb(params, cbarg);
ossl_param_bld_free(params);
OSSL_PARAM_BLD_free_params(params);
OSSL_PARAM_BLD_free(tmpl);
OPENSSL_free(pub_key);
return ok;
}
@@ -626,9 +427,11 @@ const OSSL_PARAM *ec_export_types(int selection)
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)
@@ -688,15 +491,21 @@ int ec_get_params(void *key, OSSL_PARAM params[])
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
};
@@ -730,8 +539,224 @@ int ec_set_params(void *key, const OSSL_PARAM params[])
return 1;
}
static
int ec_validate(void *keydata, int selection)
{
EC_KEY *eck = keydata;
int ok = 0;
BN_CTX *ctx = BN_CTX_new_ex(ec_key_get_libctx(eck));
if (ctx == NULL)
return 0;
if ((selection & EC_POSSIBLE_SELECTIONS) != 0)
ok = 1;
if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
ok = ok && EC_GROUP_check(EC_KEY_get0_group(eck), ctx);
if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
ok = ok && ec_key_public_check(eck, ctx);
if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
ok = ok && ec_key_private_check(eck);
if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) == OSSL_KEYMGMT_SELECT_KEYPAIR)
ok = ok && ec_key_pairwise_check(eck, ctx);
BN_CTX_free(ctx);
return ok;
}
struct ec_gen_ctx {
OPENSSL_CTX *libctx;
EC_GROUP *gen_group;
int selection;
};
static void *ec_gen_init(void *provctx, int selection)
{
OPENSSL_CTX *libctx = PROV_LIBRARY_CONTEXT_OF(provctx);
struct ec_gen_ctx *gctx = NULL;
if ((selection & (EC_POSSIBLE_SELECTIONS)) == 0)
return NULL;
if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) != NULL) {
gctx->libctx = libctx;
gctx->gen_group = NULL;
gctx->selection = selection;
}
return gctx;
}
static int ec_gen_set_group(void *genctx, int nid)
{
struct ec_gen_ctx *gctx = genctx;
EC_GROUP *group;
group = EC_GROUP_new_by_curve_name_ex(gctx->libctx, nid);
if (group == NULL) {
ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CURVE);
return 0;
}
EC_GROUP_free(gctx->gen_group);
gctx->gen_group = group;
return 1;
}
static int ec_gen_set_template(void *genctx, void *templ)
{
struct ec_gen_ctx *gctx = genctx;
EC_KEY *ec = templ;
const EC_GROUP *ec_group;
if (gctx == NULL || ec == NULL)
return 0;
if ((ec_group = EC_KEY_get0_group(ec)) == NULL)
return 0;
return ec_gen_set_group(gctx, EC_GROUP_get_curve_name(ec_group));
}
static int ec_gen_set_params(void *genctx, const OSSL_PARAM params[])
{
struct ec_gen_ctx *gctx = genctx;
const OSSL_PARAM *p;
if ((p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_EC_NAME))
!= NULL) {
const char *curve_name = NULL;
int ret = 0;
switch (p->data_type) {
case OSSL_PARAM_UTF8_STRING:
/* The OSSL_PARAM functions have no support for this */
curve_name = p->data;
ret = (curve_name != NULL);
break;
case OSSL_PARAM_UTF8_PTR:
ret = OSSL_PARAM_get_utf8_ptr(p, &curve_name);
break;
}
if (ret) {
int nid = ec_curve_name2nid(curve_name);
if (nid == NID_undef) {
ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CURVE);
ret = 0;
} else {
ret = ec_gen_set_group(gctx, nid);
}
}
return ret;
}
return 1;
}
static const OSSL_PARAM *ec_gen_settable_params(void *provctx)
{
static OSSL_PARAM settable[] = {
{ OSSL_PKEY_PARAM_EC_NAME, OSSL_PARAM_UTF8_STRING, NULL, 0, 0 },
OSSL_PARAM_END
};
return settable;
}
static int ec_gen_get_params(void *genctx, OSSL_PARAM params[])
{
struct ec_gen_ctx *gctx = genctx;
OSSL_PARAM *p;
if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_EC_NAME)) != NULL) {
int nid = EC_GROUP_get_curve_name(gctx->gen_group);
int ret = 0;
const char *curve_name = ec_curve_nid2name(nid);
switch (p->data_type) {
case OSSL_PARAM_UTF8_STRING:
ret = OSSL_PARAM_set_utf8_string(p, curve_name);
break;
case OSSL_PARAM_UTF8_PTR:
ret = OSSL_PARAM_set_utf8_ptr(p, curve_name);
break;
}
return ret;
}
return 1;
}
static const OSSL_PARAM *ec_gen_gettable_params(void *provctx)
{
static OSSL_PARAM gettable[] = {
{ OSSL_PKEY_PARAM_EC_NAME, OSSL_PARAM_UTF8_PTR, NULL, 0, 0 },
OSSL_PARAM_END
};
return gettable;
}
static int ec_gen_assign_group(EC_KEY *ec, EC_GROUP *group)
{
if (group == NULL) {
ERR_raise(ERR_LIB_PROV, PROV_R_NO_PARAMETERS_SET);
return 0;
}
return EC_KEY_set_group(ec, group) > 0;
}
/*
* The callback arguments (osslcb & cbarg) are not used by EC_KEY generation
*/
static void *ec_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
{
struct ec_gen_ctx *gctx = genctx;
EC_KEY *ec = NULL;
int ret = 1; /* Start optimistically */
if (gctx == NULL
|| (ec = EC_KEY_new_ex(gctx->libctx)) == NULL)
return NULL;
/* We must always assign a group, no matter what */
ret = ec_gen_assign_group(ec, gctx->gen_group);
/* Whether you want it or not, you get a keypair, not just one half */
if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
ret = ret && EC_KEY_generate_key(ec);
if (ret)
return ec;
/* Something went wrong, throw the key away */
EC_KEY_free(ec);
return NULL;
}
static void ec_gen_cleanup(void *genctx)
{
struct ec_gen_ctx *gctx = genctx;
if (gctx == NULL)
return;
EC_GROUP_free(gctx->gen_group);
OPENSSL_free(gctx);
}
const OSSL_DISPATCH ec_keymgmt_functions[] = {
{ OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))ec_newdata },
{ OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))ec_gen_init },
{ OSSL_FUNC_KEYMGMT_GEN_SET_TEMPLATE,
(void (*)(void))ec_gen_set_template },
{ OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))ec_gen_set_params },
{ OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
(void (*)(void))ec_gen_settable_params },
{ OSSL_FUNC_KEYMGMT_GEN_GET_PARAMS, (void (*)(void))ec_gen_get_params },
{ OSSL_FUNC_KEYMGMT_GEN_GETTABLE_PARAMS,
(void (*)(void))ec_gen_gettable_params },
{ OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))ec_gen },
{ OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))ec_gen_cleanup },
{ OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))ec_freedata },
{ OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))ec_get_params },
{ OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))ec_gettable_params },
@@ -739,11 +764,12 @@ const OSSL_DISPATCH ec_keymgmt_functions[] = {
{ OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*) (void))ec_settable_params },
{ OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))ec_has },
{ OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))ec_match },
{ OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))ec_validate },
{ OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))ec_import },
{ OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))ec_import_types },
{ OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))ec_export },
{ OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))ec_export_types },
{ OSSL_FUNC_KEYMGMT_QUERY_OPERATION_NAME,
(void (*)(void))ec_query_operation_name },
(void (*)(void))ec_query_operation_name },
{ 0, NULL }
};