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wolfssl/wolfcrypt/src/wc_encrypt.c

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/* wc_encrypt.c
*
* Copyright (C) 2006-2017 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <wolfssl/wolfcrypt/settings.h>
#include <wolfssl/wolfcrypt/aes.h>
#include <wolfssl/wolfcrypt/des3.h>
#include <wolfssl/wolfcrypt/hash.h>
#include <wolfssl/wolfcrypt/arc4.h>
#include <wolfssl/wolfcrypt/wc_encrypt.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#include <wolfssl/wolfcrypt/asn.h>
#include <wolfssl/wolfcrypt/coding.h>
#include <wolfssl/wolfcrypt/pwdbased.h>
#include <wolfssl/wolfcrypt/logging.h>
#ifdef NO_INLINE
#include <wolfssl/wolfcrypt/misc.h>
#else
#define WOLFSSL_MISC_INCLUDED
#include <wolfcrypt/src/misc.c>
#endif
#if !defined(NO_AES) && defined(HAVE_AES_CBC)
#ifdef HAVE_AES_DECRYPT
int wc_AesCbcDecryptWithKey(byte* out, const byte* in, word32 inSz,
const byte* key, word32 keySz, const byte* iv)
{
int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
Aes* aes = NULL;
#else
Aes aes[1];
#endif
if (out == NULL || in == NULL || key == NULL || iv == NULL) {
return BAD_FUNC_ARG;
}
#ifdef WOLFSSL_SMALL_STACK
aes = (Aes*)XMALLOC(sizeof(Aes), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (aes == NULL)
return MEMORY_E;
#endif
ret = wc_AesInit(aes, NULL, INVALID_DEVID);
if (ret == 0) {
ret = wc_AesSetKey(aes, key, keySz, iv, AES_DECRYPTION);
if (ret == 0)
ret = wc_AesCbcDecrypt(aes, out, in, inSz);
wc_AesFree(aes);
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(aes, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#endif /* HAVE_AES_DECRYPT */
int wc_AesCbcEncryptWithKey(byte* out, const byte* in, word32 inSz,
const byte* key, word32 keySz, const byte* iv)
{
int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
Aes* aes = NULL;
#else
Aes aes[1];
#endif
#ifdef WOLFSSL_SMALL_STACK
aes = (Aes*)XMALLOC(sizeof(Aes), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (aes == NULL)
return MEMORY_E;
#endif
ret = wc_AesInit(aes, NULL, INVALID_DEVID);
if (ret == 0) {
ret = wc_AesSetKey(aes, key, keySz, iv, AES_ENCRYPTION);
if (ret == 0)
ret = wc_AesCbcEncrypt(aes, out, in, inSz);
wc_AesFree(aes);
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(aes, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#endif /* !NO_AES && HAVE_AES_CBC */
#ifndef NO_DES3
int wc_Des_CbcEncryptWithKey(byte* out, const byte* in, word32 sz,
const byte* key, const byte* iv)
{
int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
Des* des = NULL;
#else
Des des[1];
#endif
#ifdef WOLFSSL_SMALL_STACK
des = (Des*)XMALLOC(sizeof(Des), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (des == NULL)
return MEMORY_E;
#endif
ret = wc_Des_SetKey(des, key, iv, DES_ENCRYPTION);
if (ret == 0)
ret = wc_Des_CbcEncrypt(des, out, in, sz);
#ifdef WOLFSSL_SMALL_STACK
XFREE(des, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
int wc_Des_CbcDecryptWithKey(byte* out, const byte* in, word32 sz,
const byte* key, const byte* iv)
{
int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
Des* des = NULL;
#else
Des des[1];
#endif
#ifdef WOLFSSL_SMALL_STACK
des = (Des*)XMALLOC(sizeof(Des), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (des == NULL)
return MEMORY_E;
#endif
ret = wc_Des_SetKey(des, key, iv, DES_DECRYPTION);
if (ret == 0)
ret = wc_Des_CbcDecrypt(des, out, in, sz);
#ifdef WOLFSSL_SMALL_STACK
XFREE(des, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
int wc_Des3_CbcEncryptWithKey(byte* out, const byte* in, word32 sz,
const byte* key, const byte* iv)
{
int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
Des3* des3 = NULL;
#else
Des3 des3[1];
#endif
#ifdef WOLFSSL_SMALL_STACK
des3 = (Des3*)XMALLOC(sizeof(Des3), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (des3 == NULL)
return MEMORY_E;
#endif
ret = wc_Des3Init(des3, NULL, INVALID_DEVID);
if (ret == 0) {
ret = wc_Des3_SetKey(des3, key, iv, DES_ENCRYPTION);
if (ret == 0)
ret = wc_Des3_CbcEncrypt(des3, out, in, sz);
wc_Des3Free(des3);
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(des3, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
int wc_Des3_CbcDecryptWithKey(byte* out, const byte* in, word32 sz,
const byte* key, const byte* iv)
{
int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
Des3* des3 = NULL;
#else
Des3 des3[1];
#endif
#ifdef WOLFSSL_SMALL_STACK
des3 = (Des3*)XMALLOC(sizeof(Des3), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (des3 == NULL)
return MEMORY_E;
#endif
ret = wc_Des3Init(des3, NULL, INVALID_DEVID);
if (ret == 0) {
ret = wc_Des3_SetKey(des3, key, iv, DES_DECRYPTION);
if (ret == 0)
ret = wc_Des3_CbcDecrypt(des3, out, in, sz);
wc_Des3Free(des3);
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(des3, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#endif /* !NO_DES3 */
#ifdef WOLFSSL_ENCRYPTED_KEYS
int wc_BufferKeyDecrypt(EncryptedInfo* info, byte* der, word32 derSz,
const byte* password, int passwordSz, int hashType)
{
int ret = NOT_COMPILED_IN;
#ifdef WOLFSSL_SMALL_STACK
byte* key = NULL;
#else
byte key[WC_MAX_SYM_KEY_SIZE];
#endif
(void)derSz;
(void)passwordSz;
(void)hashType;
if (der == NULL || password == NULL || info == NULL || info->keySz == 0) {
return BAD_FUNC_ARG;
}
/* use file's salt for key derivation, hex decode first */
if (Base16_Decode(info->iv, info->ivSz, info->iv, &info->ivSz) != 0) {
return BUFFER_E;
}
if (info->ivSz < PKCS5_SALT_SZ)
return BUFFER_E;
#ifdef WOLFSSL_SMALL_STACK
key = (byte*)XMALLOC(WC_MAX_SYM_KEY_SIZE, NULL, DYNAMIC_TYPE_SYMETRIC_KEY);
if (key == NULL) {
return MEMORY_E;
}
#endif
#ifndef NO_PWDBASED
if ((ret = wc_PBKDF1(key, password, passwordSz, info->iv, PKCS5_SALT_SZ, 1,
info->keySz, hashType)) != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_SYMETRIC_KEY);
#endif
return ret;
}
#endif
#ifndef NO_DES3
if (info->cipherType == WC_CIPHER_DES)
ret = wc_Des_CbcDecryptWithKey(der, der, derSz, key, info->iv);
if (info->cipherType == WC_CIPHER_DES3)
ret = wc_Des3_CbcDecryptWithKey(der, der, derSz, key, info->iv);
#endif /* NO_DES3 */
#if !defined(NO_AES) && defined(HAVE_AES_CBC) && defined(HAVE_AES_DECRYPT)
if (info->cipherType == WC_CIPHER_AES_CBC)
ret = wc_AesCbcDecryptWithKey(der, der, derSz, key, info->keySz,
info->iv);
#endif /* !NO_AES && HAVE_AES_CBC && HAVE_AES_DECRYPT */
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_SYMETRIC_KEY);
#endif
return ret;
}
int wc_BufferKeyEncrypt(EncryptedInfo* info, byte* der, word32 derSz,
const byte* password, int passwordSz, int hashType)
{
int ret = NOT_COMPILED_IN;
#ifdef WOLFSSL_SMALL_STACK
byte* key = NULL;
#else
byte key[WC_MAX_SYM_KEY_SIZE];
#endif
(void)derSz;
(void)passwordSz;
(void)hashType;
if (der == NULL || password == NULL || info == NULL || info->keySz == 0 ||
info->ivSz < PKCS5_SALT_SZ) {
return BAD_FUNC_ARG;
}
#ifdef WOLFSSL_SMALL_STACK
key = (byte*)XMALLOC(WC_MAX_SYM_KEY_SIZE, NULL, DYNAMIC_TYPE_SYMETRIC_KEY);
if (key == NULL) {
return MEMORY_E;
}
#endif /* WOLFSSL_SMALL_STACK */
#ifndef NO_PWDBASED
if ((ret = wc_PBKDF1(key, password, passwordSz, info->iv, PKCS5_SALT_SZ, 1,
info->keySz, hashType)) != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_SYMETRIC_KEY);
#endif
return ret;
}
#endif
#ifndef NO_DES3
if (info->cipherType == WC_CIPHER_DES)
ret = wc_Des_CbcEncryptWithKey(der, der, derSz, key, info->iv);
if (info->cipherType == WC_CIPHER_DES3)
ret = wc_Des3_CbcEncryptWithKey(der, der, derSz, key, info->iv);
#endif /* NO_DES3 */
#ifndef NO_AES
if (info->cipherType == WC_CIPHER_AES_CBC)
ret = wc_AesCbcEncryptWithKey(der, der, derSz, key, info->keySz,
info->iv);
#endif /* NO_AES */
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_SYMETRIC_KEY);
#endif
return ret;
}
#endif /* WOLFSSL_ENCRYPTED_KEYS */
#ifndef NO_PWDBASED
/* Decrypt/Encrypt input in place from parameters based on id
*
* returns a negative value on fail case
*/
int wc_CryptKey(const char* password, int passwordSz, byte* salt,
int saltSz, int iterations, int id, byte* input,
int length, int version, byte* cbcIv, int enc)
{
int typeH;
int derivedLen;
int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
byte* key;
#else
byte key[MAX_KEY_SIZE];
#endif
(void)input;
(void)length;
(void)enc;
WOLFSSL_ENTER("wc_CryptKey");
switch (id) {
#ifndef NO_DES3
#ifndef NO_MD5
case PBE_MD5_DES:
typeH = WC_MD5;
derivedLen = 16; /* may need iv for v1.5 */
break;
#endif
#ifndef NO_SHA
case PBE_SHA1_DES:
typeH = WC_SHA;
derivedLen = 16; /* may need iv for v1.5 */
break;
case PBE_SHA1_DES3:
typeH = WC_SHA;
derivedLen = 32; /* may need iv for v1.5 */
break;
#endif /* !NO_SHA */
#endif /* !NO_DES3 */
#if !defined(NO_SHA) && !defined(NO_RC4)
case PBE_SHA1_RC4_128:
typeH = WC_SHA;
derivedLen = 16;
break;
#endif
#ifdef WOLFSSL_AES_256
case PBE_AES256_CBC:
typeH = WC_SHA256;
derivedLen = 32;
break;
#endif
default:
WOLFSSL_MSG("Unknown/Unsupported encrypt/decrypt id");
return ALGO_ID_E;
}
#ifdef WOLFSSL_SMALL_STACK
key = (byte*)XMALLOC(MAX_KEY_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (key == NULL)
return MEMORY_E;
#endif
if (version == PKCS5v2)
ret = wc_PBKDF2(key, (byte*)password, passwordSz,
salt, saltSz, iterations, derivedLen, typeH);
#ifndef NO_SHA
else if (version == PKCS5)
ret = wc_PBKDF1(key, (byte*)password, passwordSz,
salt, saltSz, iterations, derivedLen, typeH);
#endif
else if (version == PKCS12v1) {
int i, idx = 0;
byte unicodePasswd[MAX_UNICODE_SZ];
if ( (passwordSz * 2 + 2) > (int)sizeof(unicodePasswd)) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return UNICODE_SIZE_E;
}
for (i = 0; i < passwordSz; i++) {
unicodePasswd[idx++] = 0x00;
unicodePasswd[idx++] = (byte)password[i];
}
/* add trailing NULL */
unicodePasswd[idx++] = 0x00;
unicodePasswd[idx++] = 0x00;
ret = wc_PKCS12_PBKDF(key, unicodePasswd, idx, salt, saltSz,
iterations, derivedLen, typeH, 1);
if (id != PBE_SHA1_RC4_128)
ret += wc_PKCS12_PBKDF(cbcIv, unicodePasswd, idx, salt, saltSz,
iterations, 8, typeH, 2);
}
else {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
WOLFSSL_MSG("Unknown/Unsupported PKCS version");
return ALGO_ID_E;
}
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
switch (id) {
#ifndef NO_DES3
#if !defined(NO_SHA) || !defined(NO_MD5)
case PBE_MD5_DES:
case PBE_SHA1_DES:
{
Des des;
byte* desIv = key + 8;
if (version == PKCS5v2 || version == PKCS12v1)
desIv = cbcIv;
if (enc) {
ret = wc_Des_SetKey(&des, key, desIv, DES_ENCRYPTION);
}
else {
ret = wc_Des_SetKey(&des, key, desIv, DES_DECRYPTION);
}
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
if (enc) {
wc_Des_CbcEncrypt(&des, input, input, length);
}
else {
wc_Des_CbcDecrypt(&des, input, input, length);
}
break;
}
#endif /* !NO_SHA || !NO_MD5 */
#ifndef NO_SHA
case PBE_SHA1_DES3:
{
Des3 des;
byte* desIv = key + 24;
if (version == PKCS5v2 || version == PKCS12v1)
desIv = cbcIv;
ret = wc_Des3Init(&des, NULL, INVALID_DEVID);
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
if (enc) {
ret = wc_Des3_SetKey(&des, key, desIv, DES_ENCRYPTION);
}
else {
ret = wc_Des3_SetKey(&des, key, desIv, DES_DECRYPTION);
}
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
if (enc) {
ret = wc_Des3_CbcEncrypt(&des, input, input, length);
}
else {
ret = wc_Des3_CbcDecrypt(&des, input, input, length);
}
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
break;
}
#endif /* !NO_SHA */
#endif
#if !defined(NO_RC4) && !defined(NO_SHA)
case PBE_SHA1_RC4_128:
{
Arc4 dec;
wc_Arc4SetKey(&dec, key, derivedLen);
wc_Arc4Process(&dec, input, input, length);
break;
}
#endif
#ifndef NO_AES
#ifdef WOLFSSL_AES_256
case PBE_AES256_CBC:
{
Aes dec;
ret = wc_AesInit(&dec, NULL, INVALID_DEVID);
if (ret == 0)
ret = wc_AesSetKey(&dec, key, derivedLen,
cbcIv, AES_DECRYPTION);
if (ret == 0)
ret = wc_AesCbcDecrypt(&dec, input, input, length);
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
ForceZero(&dec, sizeof(Aes));
break;
}
#endif /* WOLFSSL_AES_256 */
#endif
default:
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
WOLFSSL_MSG("Unknown/Unsupported encrypt/decryption algorithm");
return ALGO_ID_E;
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#endif /* !NO_PWDBASED */
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