ref: 8bc69a872883224675a55db51ac8f60ab5ed9e5a
dir: /third_party/boringssl/src/crypto/evp/evp_ctx.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 <string.h>
#include <openssl/digest.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include "../internal.h"
#include "internal.h"
static const EVP_PKEY_METHOD *const evp_methods[] = {
&rsa_pkey_meth,
&ec_pkey_meth,
&ed25519_pkey_meth,
&x25519_pkey_meth,
};
static const EVP_PKEY_METHOD *evp_pkey_meth_find(int type) {
for (size_t i = 0; i < sizeof(evp_methods)/sizeof(EVP_PKEY_METHOD*); i++) {
if (evp_methods[i]->pkey_id == type) {
return evp_methods[i];
}
}
return NULL;
}
static EVP_PKEY_CTX *evp_pkey_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id) {
EVP_PKEY_CTX *ret;
const EVP_PKEY_METHOD *pmeth;
if (id == -1) {
if (!pkey || !pkey->ameth) {
return NULL;
}
id = pkey->ameth->pkey_id;
}
pmeth = evp_pkey_meth_find(id);
if (pmeth == NULL) {
OPENSSL_PUT_ERROR(EVP, EVP_R_UNSUPPORTED_ALGORITHM);
ERR_add_error_dataf("algorithm %d", id);
return NULL;
}
ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
if (!ret) {
OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE);
return NULL;
}
OPENSSL_memset(ret, 0, sizeof(EVP_PKEY_CTX));
ret->engine = e;
ret->pmeth = pmeth;
ret->operation = EVP_PKEY_OP_UNDEFINED;
if (pkey) {
EVP_PKEY_up_ref(pkey);
ret->pkey = pkey;
}
if (pmeth->init) {
if (pmeth->init(ret) <= 0) {
EVP_PKEY_free(ret->pkey);
OPENSSL_free(ret);
return NULL;
}
}
return ret;
}
EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e) {
return evp_pkey_ctx_new(pkey, e, -1);
}
EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e) {
return evp_pkey_ctx_new(NULL, e, id);
}
void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx) {
if (ctx == NULL) {
return;
}
if (ctx->pmeth && ctx->pmeth->cleanup) {
ctx->pmeth->cleanup(ctx);
}
EVP_PKEY_free(ctx->pkey);
EVP_PKEY_free(ctx->peerkey);
OPENSSL_free(ctx);
}
EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *ctx) {
if (!ctx->pmeth || !ctx->pmeth->copy) {
return NULL;
}
EVP_PKEY_CTX *ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
if (!ret) {
return NULL;
}
OPENSSL_memset(ret, 0, sizeof(EVP_PKEY_CTX));
ret->pmeth = ctx->pmeth;
ret->engine = ctx->engine;
ret->operation = ctx->operation;
if (ctx->pkey != NULL) {
EVP_PKEY_up_ref(ctx->pkey);
ret->pkey = ctx->pkey;
}
if (ctx->peerkey != NULL) {
EVP_PKEY_up_ref(ctx->peerkey);
ret->peerkey = ctx->peerkey;
}
if (ctx->pmeth->copy(ret, ctx) <= 0) {
ret->pmeth = NULL;
EVP_PKEY_CTX_free(ret);
OPENSSL_PUT_ERROR(EVP, ERR_LIB_EVP);
return NULL;
}
return ret;
}
EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx) { return ctx->pkey; }
int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype, int cmd,
int p1, void *p2) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
OPENSSL_PUT_ERROR(EVP, EVP_R_COMMAND_NOT_SUPPORTED);
return 0;
}
if (keytype != -1 && ctx->pmeth->pkey_id != keytype) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
OPENSSL_PUT_ERROR(EVP, EVP_R_NO_OPERATION_SET);
return 0;
}
if (optype != -1 && !(ctx->operation & optype)) {
OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_OPERATION);
return 0;
}
return ctx->pmeth->ctrl(ctx, cmd, p1, p2);
}
int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx) {
if (ctx == NULL || ctx->pmeth == NULL ||
(ctx->pmeth->sign == NULL && ctx->pmeth->sign_message == NULL)) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
ctx->operation = EVP_PKEY_OP_SIGN;
return 1;
}
int EVP_PKEY_sign(EVP_PKEY_CTX *ctx, uint8_t *sig, size_t *sig_len,
const uint8_t *digest, size_t digest_len) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation != EVP_PKEY_OP_SIGN) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATON_NOT_INITIALIZED);
return 0;
}
return ctx->pmeth->sign(ctx, sig, sig_len, digest, digest_len);
}
int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx) {
if (ctx == NULL || ctx->pmeth == NULL ||
(ctx->pmeth->verify == NULL && ctx->pmeth->verify_message == NULL)) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
ctx->operation = EVP_PKEY_OP_VERIFY;
return 1;
}
int EVP_PKEY_verify(EVP_PKEY_CTX *ctx, const uint8_t *sig, size_t sig_len,
const uint8_t *digest, size_t digest_len) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation != EVP_PKEY_OP_VERIFY) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATON_NOT_INITIALIZED);
return 0;
}
return ctx->pmeth->verify(ctx, sig, sig_len, digest, digest_len);
}
int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
ctx->operation = EVP_PKEY_OP_ENCRYPT;
return 1;
}
int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx, uint8_t *out, size_t *outlen,
const uint8_t *in, size_t inlen) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation != EVP_PKEY_OP_ENCRYPT) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATON_NOT_INITIALIZED);
return 0;
}
return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
}
int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
ctx->operation = EVP_PKEY_OP_DECRYPT;
return 1;
}
int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx, uint8_t *out, size_t *outlen,
const uint8_t *in, size_t inlen) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation != EVP_PKEY_OP_DECRYPT) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATON_NOT_INITIALIZED);
return 0;
}
return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
}
int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
ctx->operation = EVP_PKEY_OP_VERIFYRECOVER;
return 1;
}
int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx, uint8_t *out, size_t *out_len,
const uint8_t *sig, size_t sig_len) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATON_NOT_INITIALIZED);
return 0;
}
return ctx->pmeth->verify_recover(ctx, out, out_len, sig, sig_len);
}
int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
ctx->operation = EVP_PKEY_OP_DERIVE;
return 1;
}
int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer) {
int ret;
if (!ctx || !ctx->pmeth ||
!(ctx->pmeth->derive || ctx->pmeth->encrypt || ctx->pmeth->decrypt) ||
!ctx->pmeth->ctrl) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation != EVP_PKEY_OP_DERIVE &&
ctx->operation != EVP_PKEY_OP_ENCRYPT &&
ctx->operation != EVP_PKEY_OP_DECRYPT) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATON_NOT_INITIALIZED);
return 0;
}
ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer);
if (ret <= 0) {
return 0;
}
if (ret == 2) {
return 1;
}
if (!ctx->pkey) {
OPENSSL_PUT_ERROR(EVP, EVP_R_NO_KEY_SET);
return 0;
}
if (ctx->pkey->type != peer->type) {
OPENSSL_PUT_ERROR(EVP, EVP_R_DIFFERENT_KEY_TYPES);
return 0;
}
// ran@cryptocom.ru: For clarity. The error is if parameters in peer are
// present (!missing) but don't match. EVP_PKEY_cmp_parameters may return
// 1 (match), 0 (don't match) and -2 (comparison is not defined). -1
// (different key types) is impossible here because it is checked earlier.
// -2 is OK for us here, as well as 1, so we can check for 0 only.
if (!EVP_PKEY_missing_parameters(peer) &&
!EVP_PKEY_cmp_parameters(ctx->pkey, peer)) {
OPENSSL_PUT_ERROR(EVP, EVP_R_DIFFERENT_PARAMETERS);
return 0;
}
EVP_PKEY_free(ctx->peerkey);
ctx->peerkey = peer;
ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer);
if (ret <= 0) {
ctx->peerkey = NULL;
return 0;
}
EVP_PKEY_up_ref(peer);
return 1;
}
int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, uint8_t *key, size_t *out_key_len) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation != EVP_PKEY_OP_DERIVE) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATON_NOT_INITIALIZED);
return 0;
}
return ctx->pmeth->derive(ctx, key, out_key_len);
}
int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
ctx->operation = EVP_PKEY_OP_KEYGEN;
return 1;
}
int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **out_pkey) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATON_NOT_INITIALIZED);
return 0;
}
if (!out_pkey) {
return 0;
}
if (!*out_pkey) {
*out_pkey = EVP_PKEY_new();
if (!*out_pkey) {
OPENSSL_PUT_ERROR(EVP, ERR_LIB_EVP);
return 0;
}
}
if (!ctx->pmeth->keygen(ctx, *out_pkey)) {
EVP_PKEY_free(*out_pkey);
*out_pkey = NULL;
return 0;
}
return 1;
}
int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
ctx->operation = EVP_PKEY_OP_PARAMGEN;
return 1;
}
int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **out_pkey) {
if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return 0;
}
if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
OPENSSL_PUT_ERROR(EVP, EVP_R_OPERATON_NOT_INITIALIZED);
return 0;
}
if (!out_pkey) {
return 0;
}
if (!*out_pkey) {
*out_pkey = EVP_PKEY_new();
if (!*out_pkey) {
OPENSSL_PUT_ERROR(EVP, ERR_LIB_EVP);
return 0;
}
}
if (!ctx->pmeth->paramgen(ctx, *out_pkey)) {
EVP_PKEY_free(*out_pkey);
*out_pkey = NULL;
return 0;
}
return 1;
}