yuzu/externals/libressl/crypto/evp/evp_lib.c

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2020-12-28 19:15:37 +04:00
/* $OpenBSD: evp_lib.c,v 1.17 2018/09/12 06:35:38 djm Exp $ */
/* 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 <stdio.h>
#include <string.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
int
EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
{
int ret;
if (c->cipher->set_asn1_parameters != NULL)
ret = c->cipher->set_asn1_parameters(c, type);
else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1)
ret = EVP_CIPHER_set_asn1_iv(c, type);
else
ret = -1;
return (ret);
}
int
EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
{
int ret;
if (c->cipher->get_asn1_parameters != NULL)
ret = c->cipher->get_asn1_parameters(c, type);
else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1)
ret = EVP_CIPHER_get_asn1_iv(c, type);
else
ret = -1;
return (ret);
}
int
EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
{
int i = 0;
unsigned int l;
if (type != NULL) {
l = EVP_CIPHER_CTX_iv_length(c);
if (l > sizeof(c->iv)) {
EVPerror(EVP_R_IV_TOO_LARGE);
return 0;
}
i = ASN1_TYPE_get_octetstring(type, c->oiv, l);
if (i != (int)l)
return (-1);
else if (i > 0)
memcpy(c->iv, c->oiv, l);
}
return (i);
}
int
EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
{
int i = 0;
unsigned int j;
if (type != NULL) {
j = EVP_CIPHER_CTX_iv_length(c);
if (j > sizeof(c->iv)) {
EVPerror(EVP_R_IV_TOO_LARGE);
return 0;
}
i = ASN1_TYPE_set_octetstring(type, c->oiv, j);
}
return (i);
}
/* Convert the various cipher NIDs and dummies to a proper OID NID */
int
EVP_CIPHER_type(const EVP_CIPHER *ctx)
{
int nid;
ASN1_OBJECT *otmp;
nid = EVP_CIPHER_nid(ctx);
switch (nid) {
case NID_rc2_cbc:
case NID_rc2_64_cbc:
case NID_rc2_40_cbc:
return NID_rc2_cbc;
case NID_rc4:
case NID_rc4_40:
return NID_rc4;
case NID_aes_128_cfb128:
case NID_aes_128_cfb8:
case NID_aes_128_cfb1:
return NID_aes_128_cfb128;
case NID_aes_192_cfb128:
case NID_aes_192_cfb8:
case NID_aes_192_cfb1:
return NID_aes_192_cfb128;
case NID_aes_256_cfb128:
case NID_aes_256_cfb8:
case NID_aes_256_cfb1:
return NID_aes_256_cfb128;
case NID_des_cfb64:
case NID_des_cfb8:
case NID_des_cfb1:
return NID_des_cfb64;
case NID_des_ede3_cfb64:
case NID_des_ede3_cfb8:
case NID_des_ede3_cfb1:
return NID_des_cfb64;
default:
/* Check it has an OID and it is valid */
otmp = OBJ_nid2obj(nid);
if (!otmp || !otmp->data)
nid = NID_undef;
ASN1_OBJECT_free(otmp);
return nid;
}
}
int
EVP_CIPHER_block_size(const EVP_CIPHER *e)
{
return e->block_size;
}
int
EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
{
return ctx->cipher->block_size;
}
int
EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in,
unsigned int inl)
{
return ctx->cipher->do_cipher(ctx, out, in, inl);
}
const EVP_CIPHER *
EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
{
return ctx->cipher;
}
int
EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx)
{
return ctx->encrypt;
}
unsigned long
EVP_CIPHER_flags(const EVP_CIPHER *cipher)
{
return cipher->flags;
}
unsigned long
EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx)
{
return ctx->cipher->flags;
}
void *
EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
{
return ctx->app_data;
}
void
EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
{
ctx->app_data = data;
}
int
EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
{
return cipher->iv_len;
}
int
EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
{
return ctx->cipher->iv_len;
}
int
EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
{
return cipher->key_len;
}
int
EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
{
return ctx->key_len;
}
int
EVP_CIPHER_nid(const EVP_CIPHER *cipher)
{
return cipher->nid;
}
int
EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
{
return ctx->cipher->nid;
}
int
EVP_CIPHER_CTX_get_iv(const EVP_CIPHER_CTX *ctx, unsigned char *iv, size_t len)
{
if (ctx == NULL || len != EVP_CIPHER_CTX_iv_length(ctx))
return 0;
if (len > EVP_MAX_IV_LENGTH)
return 0; /* sanity check; shouldn't happen */
/*
* Skip the memcpy entirely when the requested IV length is zero,
* since the iv pointer may be NULL or invalid.
*/
if (len != 0) {
if (iv == NULL)
return 0;
memcpy(iv, ctx->iv, len);
}
return 1;
}
int
EVP_CIPHER_CTX_set_iv(EVP_CIPHER_CTX *ctx, const unsigned char *iv, size_t len)
{
if (ctx == NULL || len != EVP_CIPHER_CTX_iv_length(ctx))
return 0;
if (len > EVP_MAX_IV_LENGTH)
return 0; /* sanity check; shouldn't happen */
/*
* Skip the memcpy entirely when the requested IV length is zero,
* since the iv pointer may be NULL or invalid.
*/
if (len != 0) {
if (iv == NULL)
return 0;
memcpy(ctx->iv, iv, len);
}
return 1;
}
int
EVP_MD_block_size(const EVP_MD *md)
{
return md->block_size;
}
int
EVP_MD_type(const EVP_MD *md)
{
return md->type;
}
int
EVP_MD_pkey_type(const EVP_MD *md)
{
return md->pkey_type;
}
int
EVP_MD_size(const EVP_MD *md)
{
if (!md) {
EVPerror(EVP_R_MESSAGE_DIGEST_IS_NULL);
return -1;
}
return md->md_size;
}
unsigned long
EVP_MD_flags(const EVP_MD *md)
{
return md->flags;
}
const EVP_MD *
EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
{
if (!ctx)
return NULL;
return ctx->digest;
}
void
EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
{
ctx->flags |= flags;
}
void
EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
{
ctx->flags &= ~flags;
}
int
EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
{
return (ctx->flags & flags);
}
void
EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
{
ctx->flags |= flags;
}
void
EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
{
ctx->flags &= ~flags;
}
int
EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
{
return (ctx->flags & flags);
}