ref: 8bc69a872883224675a55db51ac8f60ab5ed9e5a
dir: /third_party/boringssl/src/crypto/evp/evp.c/
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#include <openssl/evp.h>
#include <assert.h>
#include <string.h>
#include <openssl/dsa.h>
#include <openssl/ec.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/nid.h>
#include <openssl/rsa.h>
#include <openssl/thread.h>
#include "internal.h"
#include "../internal.h"
// Node depends on |EVP_R_NOT_XOF_OR_INVALID_LENGTH|.
//
// TODO(davidben): Fix Node to not touch the error queue itself and remove this.
OPENSSL_DECLARE_ERROR_REASON(EVP, NOT_XOF_OR_INVALID_LENGTH)
// The HPKE module uses the EVP error namespace, but it lives in another
// directory.
OPENSSL_DECLARE_ERROR_REASON(EVP, EMPTY_PSK)
EVP_PKEY *EVP_PKEY_new(void) {
EVP_PKEY *ret;
ret = OPENSSL_malloc(sizeof(EVP_PKEY));
if (ret == NULL) {
OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
return NULL;
}
OPENSSL_memset(ret, 0, sizeof(EVP_PKEY));
ret->type = EVP_PKEY_NONE;
ret->references = 1;
return ret;
}
static void free_it(EVP_PKEY *pkey) {
if (pkey->ameth && pkey->ameth->pkey_free) {
pkey->ameth->pkey_free(pkey);
pkey->pkey.ptr = NULL;
pkey->type = EVP_PKEY_NONE;
}
}
void EVP_PKEY_free(EVP_PKEY *pkey) {
if (pkey == NULL) {
return;
}
if (!CRYPTO_refcount_dec_and_test_zero(&pkey->references)) {
return;
}
free_it(pkey);
OPENSSL_free(pkey);
}
int EVP_PKEY_up_ref(EVP_PKEY *pkey) {
CRYPTO_refcount_inc(&pkey->references);
return 1;
}
int EVP_PKEY_is_opaque(const EVP_PKEY *pkey) {
if (pkey->ameth && pkey->ameth->pkey_opaque) {
return pkey->ameth->pkey_opaque(pkey);
}
return 0;
}
int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b) {
if (a->type != b->type) {
return -1;
}
if (a->ameth) {
int ret;
// Compare parameters if the algorithm has them
if (a->ameth->param_cmp) {
ret = a->ameth->param_cmp(a, b);
if (ret <= 0) {
return ret;
}
}
if (a->ameth->pub_cmp) {
return a->ameth->pub_cmp(a, b);
}
}
return -2;
}
int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) {
if (to->type != from->type) {
OPENSSL_PUT_ERROR(EVP, EVP_R_DIFFERENT_KEY_TYPES);
goto err;
}
if (EVP_PKEY_missing_parameters(from)) {
OPENSSL_PUT_ERROR(EVP, EVP_R_MISSING_PARAMETERS);
goto err;
}
if (from->ameth && from->ameth->param_copy) {
return from->ameth->param_copy(to, from);
}
err:
return 0;
}
int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey) {
if (pkey->ameth && pkey->ameth->param_missing) {
return pkey->ameth->param_missing(pkey);
}
return 0;
}
int EVP_PKEY_size(const EVP_PKEY *pkey) {
if (pkey && pkey->ameth && pkey->ameth->pkey_size) {
return pkey->ameth->pkey_size(pkey);
}
return 0;
}
int EVP_PKEY_bits(const EVP_PKEY *pkey) {
if (pkey && pkey->ameth && pkey->ameth->pkey_bits) {
return pkey->ameth->pkey_bits(pkey);
}
return 0;
}
int EVP_PKEY_id(const EVP_PKEY *pkey) {
return pkey->type;
}
// evp_pkey_asn1_find returns the ASN.1 method table for the given |nid|, which
// should be one of the |EVP_PKEY_*| values. It returns NULL if |nid| is
// unknown.
static const EVP_PKEY_ASN1_METHOD *evp_pkey_asn1_find(int nid) {
switch (nid) {
case EVP_PKEY_RSA:
return &rsa_asn1_meth;
case EVP_PKEY_EC:
return &ec_asn1_meth;
case EVP_PKEY_DSA:
return &dsa_asn1_meth;
case EVP_PKEY_ED25519:
return &ed25519_asn1_meth;
case EVP_PKEY_X25519:
return &x25519_asn1_meth;
default:
return NULL;
}
}
int EVP_PKEY_type(int nid) {
const EVP_PKEY_ASN1_METHOD *meth = evp_pkey_asn1_find(nid);
if (meth == NULL) {
return NID_undef;
}
return meth->pkey_id;
}
int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) {
if (EVP_PKEY_assign_RSA(pkey, key)) {
RSA_up_ref(key);
return 1;
}
return 0;
}
int EVP_PKEY_assign_RSA(EVP_PKEY *pkey, RSA *key) {
return EVP_PKEY_assign(pkey, EVP_PKEY_RSA, key);
}
RSA *EVP_PKEY_get0_RSA(const EVP_PKEY *pkey) {
if (pkey->type != EVP_PKEY_RSA) {
OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_AN_RSA_KEY);
return NULL;
}
return pkey->pkey.rsa;
}
RSA *EVP_PKEY_get1_RSA(const EVP_PKEY *pkey) {
RSA *rsa = EVP_PKEY_get0_RSA(pkey);
if (rsa != NULL) {
RSA_up_ref(rsa);
}
return rsa;
}
int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) {
if (EVP_PKEY_assign_DSA(pkey, key)) {
DSA_up_ref(key);
return 1;
}
return 0;
}
int EVP_PKEY_assign_DSA(EVP_PKEY *pkey, DSA *key) {
return EVP_PKEY_assign(pkey, EVP_PKEY_DSA, key);
}
DSA *EVP_PKEY_get0_DSA(const EVP_PKEY *pkey) {
if (pkey->type != EVP_PKEY_DSA) {
OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_A_DSA_KEY);
return NULL;
}
return pkey->pkey.dsa;
}
DSA *EVP_PKEY_get1_DSA(const EVP_PKEY *pkey) {
DSA *dsa = EVP_PKEY_get0_DSA(pkey);
if (dsa != NULL) {
DSA_up_ref(dsa);
}
return dsa;
}
int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) {
if (EVP_PKEY_assign_EC_KEY(pkey, key)) {
EC_KEY_up_ref(key);
return 1;
}
return 0;
}
int EVP_PKEY_assign_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) {
return EVP_PKEY_assign(pkey, EVP_PKEY_EC, key);
}
EC_KEY *EVP_PKEY_get0_EC_KEY(const EVP_PKEY *pkey) {
if (pkey->type != EVP_PKEY_EC) {
OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_AN_EC_KEY_KEY);
return NULL;
}
return pkey->pkey.ec;
}
EC_KEY *EVP_PKEY_get1_EC_KEY(const EVP_PKEY *pkey) {
EC_KEY *ec_key = EVP_PKEY_get0_EC_KEY(pkey);
if (ec_key != NULL) {
EC_KEY_up_ref(ec_key);
}
return ec_key;
}
DH *EVP_PKEY_get0_DH(const EVP_PKEY *pkey) { return NULL; }
DH *EVP_PKEY_get1_DH(const EVP_PKEY *pkey) { return NULL; }
int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key) {
if (!EVP_PKEY_set_type(pkey, type)) {
return 0;
}
pkey->pkey.ptr = key;
return key != NULL;
}
int EVP_PKEY_set_type(EVP_PKEY *pkey, int type) {
const EVP_PKEY_ASN1_METHOD *ameth;
if (pkey && pkey->pkey.ptr) {
free_it(pkey);
}
ameth = evp_pkey_asn1_find(type);
if (ameth == NULL) {
OPENSSL_PUT_ERROR(EVP, EVP_R_UNSUPPORTED_ALGORITHM);
ERR_add_error_dataf("algorithm %d", type);
return 0;
}
if (pkey) {
pkey->ameth = ameth;
pkey->type = pkey->ameth->pkey_id;
}
return 1;
}
EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *unused,
const uint8_t *in, size_t len) {
EVP_PKEY *ret = EVP_PKEY_new();
if (ret == NULL ||
!EVP_PKEY_set_type(ret, type)) {
goto err;
}
if (ret->ameth->set_priv_raw == NULL) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
goto err;
}
if (!ret->ameth->set_priv_raw(ret, in, len)) {
goto err;
}
return ret;
err:
EVP_PKEY_free(ret);
return NULL;
}
EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *unused,
const uint8_t *in, size_t len) {
EVP_PKEY *ret = EVP_PKEY_new();
if (ret == NULL ||
!EVP_PKEY_set_type(ret, type)) {
goto err;
}
if (ret->ameth->set_pub_raw == NULL) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
goto err;
}
if (!ret->ameth->set_pub_raw(ret, in, len)) {
goto err;
}
return ret;
err:
EVP_PKEY_free(ret);
return NULL;
}
int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, uint8_t *out,
size_t *out_len) {
if (pkey->ameth->get_priv_raw == NULL) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
return pkey->ameth->get_priv_raw(pkey, out, out_len);
}
int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, uint8_t *out,
size_t *out_len) {
if (pkey->ameth->get_pub_raw == NULL) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
return pkey->ameth->get_pub_raw(pkey, out, out_len);
}
int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) {
if (a->type != b->type) {
return -1;
}
if (a->ameth && a->ameth->param_cmp) {
return a->ameth->param_cmp(a, b);
}
return -2;
}
int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md) {
return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD, 0,
(void *)md);
}
int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **out_md) {
return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_GET_MD,
0, (void *)out_md);
}
void *EVP_PKEY_get0(const EVP_PKEY *pkey) {
// Node references, but never calls this function, so for now we return NULL.
// If other projects require complete support, call |EVP_PKEY_get0_RSA|, etc.,
// rather than reading |pkey->pkey.ptr| directly. This avoids problems if our
// internal representation does not match the type the caller expects from
// OpenSSL.
return NULL;
}
void OpenSSL_add_all_algorithms(void) {}
void OPENSSL_add_all_algorithms_conf(void) {}
void OpenSSL_add_all_ciphers(void) {}
void OpenSSL_add_all_digests(void) {}
void EVP_cleanup(void) {}
int EVP_PKEY_base_id(const EVP_PKEY *pkey) {
// OpenSSL has two notions of key type because it supports multiple OIDs for
// the same algorithm: NID_rsa vs NID_rsaEncryption and five distinct spelling
// of DSA. We do not support these, so the base ID is simply the ID.
return EVP_PKEY_id(pkey);
}