700 lines
19 KiB
C
700 lines
19 KiB
C
/* wc_encrypt.c
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*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <wolfssl/wolfcrypt/settings.h>
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#include <wolfssl/wolfcrypt/aes.h>
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#include <wolfssl/wolfcrypt/des3.h>
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#include <wolfssl/wolfcrypt/hash.h>
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#include <wolfssl/wolfcrypt/rc2.h>
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#include <wolfssl/wolfcrypt/arc4.h>
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#include <wolfssl/wolfcrypt/wc_encrypt.h>
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#include <wolfssl/wolfcrypt/error-crypt.h>
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#include <wolfssl/wolfcrypt/asn.h>
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#include <wolfssl/wolfcrypt/coding.h>
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#include <wolfssl/wolfcrypt/pwdbased.h>
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#include <wolfssl/wolfcrypt/logging.h>
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#ifdef NO_INLINE
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#include <wolfssl/wolfcrypt/misc.h>
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#else
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#define WOLFSSL_MISC_INCLUDED
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#include <wolfcrypt/src/misc.c>
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#endif
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#if !defined(NO_AES) && defined(HAVE_AES_CBC)
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#ifdef HAVE_AES_DECRYPT
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int wc_AesCbcDecryptWithKey(byte* out, const byte* in, word32 inSz,
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const byte* key, word32 keySz, const byte* iv)
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{
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int ret = 0;
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#ifdef WOLFSSL_SMALL_STACK
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Aes* aes = NULL;
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#else
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Aes aes[1];
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#endif
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if (out == NULL || in == NULL || key == NULL || iv == NULL) {
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return BAD_FUNC_ARG;
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}
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#ifdef WOLFSSL_SMALL_STACK
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aes = (Aes*)XMALLOC(sizeof(Aes), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (aes == NULL)
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return MEMORY_E;
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#endif
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ret = wc_AesInit(aes, NULL, INVALID_DEVID);
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if (ret == 0) {
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ret = wc_AesSetKey(aes, key, keySz, iv, AES_DECRYPTION);
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if (ret == 0)
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ret = wc_AesCbcDecrypt(aes, out, in, inSz);
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wc_AesFree(aes);
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}
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(aes, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return ret;
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}
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#endif /* HAVE_AES_DECRYPT */
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int wc_AesCbcEncryptWithKey(byte* out, const byte* in, word32 inSz,
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const byte* key, word32 keySz, const byte* iv)
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{
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int ret = 0;
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#ifdef WOLFSSL_SMALL_STACK
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Aes* aes;
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#else
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Aes aes[1];
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#endif
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#ifdef WOLFSSL_SMALL_STACK
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aes = (Aes*)XMALLOC(sizeof(Aes), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (aes == NULL)
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return MEMORY_E;
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#endif
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ret = wc_AesInit(aes, NULL, INVALID_DEVID);
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if (ret == 0) {
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ret = wc_AesSetKey(aes, key, keySz, iv, AES_ENCRYPTION);
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if (ret == 0)
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ret = wc_AesCbcEncrypt(aes, out, in, inSz);
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wc_AesFree(aes);
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}
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(aes, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return ret;
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}
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#endif /* !NO_AES && HAVE_AES_CBC */
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#if !defined(NO_DES3) && !defined(WOLFSSL_TI_CRYPT)
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int wc_Des_CbcEncryptWithKey(byte* out, const byte* in, word32 sz,
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const byte* key, const byte* iv)
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{
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int ret = 0;
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#ifdef WOLFSSL_SMALL_STACK
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Des* des;
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#else
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Des des[1];
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#endif
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#ifdef WOLFSSL_SMALL_STACK
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des = (Des*)XMALLOC(sizeof(Des), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (des == NULL)
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return MEMORY_E;
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#endif
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ret = wc_Des_SetKey(des, key, iv, DES_ENCRYPTION);
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if (ret == 0)
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ret = wc_Des_CbcEncrypt(des, out, in, sz);
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(des, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return ret;
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}
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int wc_Des_CbcDecryptWithKey(byte* out, const byte* in, word32 sz,
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const byte* key, const byte* iv)
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{
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int ret = 0;
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#ifdef WOLFSSL_SMALL_STACK
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Des* des;
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#else
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Des des[1];
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#endif
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#ifdef WOLFSSL_SMALL_STACK
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des = (Des*)XMALLOC(sizeof(Des), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (des == NULL)
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return MEMORY_E;
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#endif
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ret = wc_Des_SetKey(des, key, iv, DES_DECRYPTION);
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if (ret == 0)
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ret = wc_Des_CbcDecrypt(des, out, in, sz);
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(des, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return ret;
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}
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int wc_Des3_CbcEncryptWithKey(byte* out, const byte* in, word32 sz,
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const byte* key, const byte* iv)
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{
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int ret = 0;
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#ifdef WOLFSSL_SMALL_STACK
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Des3* des3;
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#else
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Des3 des3[1];
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#endif
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#ifdef WOLFSSL_SMALL_STACK
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des3 = (Des3*)XMALLOC(sizeof(Des3), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (des3 == NULL)
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return MEMORY_E;
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#endif
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ret = wc_Des3Init(des3, NULL, INVALID_DEVID);
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if (ret == 0) {
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ret = wc_Des3_SetKey(des3, key, iv, DES_ENCRYPTION);
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if (ret == 0)
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ret = wc_Des3_CbcEncrypt(des3, out, in, sz);
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wc_Des3Free(des3);
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}
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(des3, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return ret;
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}
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int wc_Des3_CbcDecryptWithKey(byte* out, const byte* in, word32 sz,
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const byte* key, const byte* iv)
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{
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int ret = 0;
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#ifdef WOLFSSL_SMALL_STACK
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Des3* des3;
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#else
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Des3 des3[1];
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#endif
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#ifdef WOLFSSL_SMALL_STACK
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des3 = (Des3*)XMALLOC(sizeof(Des3), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (des3 == NULL)
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return MEMORY_E;
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#endif
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ret = wc_Des3Init(des3, NULL, INVALID_DEVID);
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if (ret == 0) {
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ret = wc_Des3_SetKey(des3, key, iv, DES_DECRYPTION);
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if (ret == 0)
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ret = wc_Des3_CbcDecrypt(des3, out, in, sz);
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wc_Des3Free(des3);
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}
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(des3, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return ret;
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}
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#endif /* !NO_DES3 */
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#if !defined(NO_ASN) && defined(WOLFSSL_ENCRYPTED_KEYS)
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int wc_BufferKeyDecrypt(EncryptedInfo* info, byte* der, word32 derSz,
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const byte* password, int passwordSz, int hashType)
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{
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int ret = NOT_COMPILED_IN;
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#ifdef WOLFSSL_SMALL_STACK
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byte* key = NULL;
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#else
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byte key[WC_MAX_SYM_KEY_SIZE];
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#endif
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(void)derSz;
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(void)passwordSz;
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(void)hashType;
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if (der == NULL || password == NULL || info == NULL || info->keySz == 0) {
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return BAD_FUNC_ARG;
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}
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/* use file's salt for key derivation, hex decode first */
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if (Base16_Decode(info->iv, info->ivSz, info->iv, &info->ivSz) != 0) {
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return BUFFER_E;
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}
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if (info->ivSz < PKCS5_SALT_SZ)
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return BUFFER_E;
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#ifdef WOLFSSL_SMALL_STACK
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key = (byte*)XMALLOC(WC_MAX_SYM_KEY_SIZE, NULL, DYNAMIC_TYPE_SYMMETRIC_KEY);
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if (key == NULL) {
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return MEMORY_E;
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}
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#endif
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(void)XMEMSET(key, 0, WC_MAX_SYM_KEY_SIZE);
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#ifndef NO_PWDBASED
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if ((ret = wc_PBKDF1(key, password, passwordSz, info->iv, PKCS5_SALT_SZ, 1,
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info->keySz, hashType)) != 0) {
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(key, NULL, DYNAMIC_TYPE_SYMMETRIC_KEY);
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#endif
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return ret;
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}
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#endif
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#ifndef NO_DES3
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if (info->cipherType == WC_CIPHER_DES)
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ret = wc_Des_CbcDecryptWithKey(der, der, derSz, key, info->iv);
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if (info->cipherType == WC_CIPHER_DES3)
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ret = wc_Des3_CbcDecryptWithKey(der, der, derSz, key, info->iv);
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#endif /* NO_DES3 */
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#if !defined(NO_AES) && defined(HAVE_AES_CBC) && defined(HAVE_AES_DECRYPT)
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if (info->cipherType == WC_CIPHER_AES_CBC)
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ret = wc_AesCbcDecryptWithKey(der, der, derSz, key, info->keySz,
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info->iv);
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#endif /* !NO_AES && HAVE_AES_CBC && HAVE_AES_DECRYPT */
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(key, NULL, DYNAMIC_TYPE_SYMMETRIC_KEY);
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#endif
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return ret;
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}
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int wc_BufferKeyEncrypt(EncryptedInfo* info, byte* der, word32 derSz,
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const byte* password, int passwordSz, int hashType)
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{
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int ret = NOT_COMPILED_IN;
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#ifdef WOLFSSL_SMALL_STACK
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byte* key = NULL;
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#else
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byte key[WC_MAX_SYM_KEY_SIZE];
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#endif
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(void)derSz;
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(void)passwordSz;
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(void)hashType;
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if (der == NULL || password == NULL || info == NULL || info->keySz == 0 ||
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info->ivSz < PKCS5_SALT_SZ) {
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return BAD_FUNC_ARG;
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}
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#ifdef WOLFSSL_SMALL_STACK
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key = (byte*)XMALLOC(WC_MAX_SYM_KEY_SIZE, NULL, DYNAMIC_TYPE_SYMMETRIC_KEY);
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if (key == NULL) {
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return MEMORY_E;
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}
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#endif /* WOLFSSL_SMALL_STACK */
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(void)XMEMSET(key, 0, WC_MAX_SYM_KEY_SIZE);
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#ifndef NO_PWDBASED
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if ((ret = wc_PBKDF1(key, password, passwordSz, info->iv, PKCS5_SALT_SZ, 1,
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info->keySz, hashType)) != 0) {
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(key, NULL, DYNAMIC_TYPE_SYMMETRIC_KEY);
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#endif
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return ret;
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}
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#endif
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#ifndef NO_DES3
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if (info->cipherType == WC_CIPHER_DES)
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ret = wc_Des_CbcEncryptWithKey(der, der, derSz, key, info->iv);
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if (info->cipherType == WC_CIPHER_DES3)
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ret = wc_Des3_CbcEncryptWithKey(der, der, derSz, key, info->iv);
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#endif /* NO_DES3 */
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#if !defined(NO_AES) && defined(HAVE_AES_CBC)
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if (info->cipherType == WC_CIPHER_AES_CBC)
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ret = wc_AesCbcEncryptWithKey(der, der, derSz, key, info->keySz,
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info->iv);
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#endif /* !NO_AES && HAVE_AES_CBC */
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(key, NULL, DYNAMIC_TYPE_SYMMETRIC_KEY);
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#endif
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return ret;
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}
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#endif /* !NO_ASN && WOLFSSL_ENCRYPTED_KEYS */
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#if !defined(NO_PWDBASED) && !defined(NO_ASN)
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#if defined(HAVE_PKCS8) || defined(HAVE_PKCS12)
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/* Decrypt/Encrypt input in place from parameters based on id
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*
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* returns a negative value on fail case
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*/
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int wc_CryptKey(const char* password, int passwordSz, byte* salt,
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int saltSz, int iterations, int id, byte* input,
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int length, int version, byte* cbcIv, int enc, int shaOid)
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{
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int typeH = WC_HASH_TYPE_NONE;
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int derivedLen = 0;
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int ret = 0;
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#ifdef WOLFSSL_SMALL_STACK
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byte* key;
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#else
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byte key[MAX_KEY_SIZE];
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#endif
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(void)input;
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(void)length;
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(void)enc;
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WOLFSSL_ENTER("wc_CryptKey");
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switch (id) {
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#ifndef NO_DES3
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#ifndef NO_MD5
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case PBE_MD5_DES:
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typeH = WC_MD5;
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derivedLen = 16; /* may need iv for v1.5 */
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break;
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#endif
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#ifndef NO_SHA
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case PBE_SHA1_DES:
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typeH = WC_SHA;
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derivedLen = 16; /* may need iv for v1.5 */
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break;
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case PBE_SHA1_DES3:
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switch(shaOid) {
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case HMAC_SHA256_OID:
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typeH = WC_SHA256;
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derivedLen = 32;
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break;
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default:
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typeH = WC_SHA;
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derivedLen = 32; /* may need iv for v1.5 */
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break;
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}
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break;
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#endif /* !NO_SHA */
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#endif /* !NO_DES3 */
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#if !defined(NO_SHA) && !defined(NO_RC4)
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case PBE_SHA1_RC4_128:
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typeH = WC_SHA;
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derivedLen = 16;
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break;
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#endif
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#if defined(WOLFSSL_AES_256)
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case PBE_AES256_CBC:
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switch(shaOid) {
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case HMAC_SHA256_OID:
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typeH = WC_SHA256;
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derivedLen = 32;
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break;
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#ifndef NO_SHA
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default:
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typeH = WC_SHA;
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derivedLen = 32;
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break;
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#endif
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}
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break;
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#endif /* WOLFSSL_AES_256 && !NO_SHA */
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#if defined(WOLFSSL_AES_128)
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case PBE_AES128_CBC:
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switch(shaOid) {
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case HMAC_SHA256_OID:
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typeH = WC_SHA256;
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derivedLen = 16;
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break;
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#ifndef NO_SHA
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default:
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typeH = WC_SHA;
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derivedLen = 16;
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break;
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#endif
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}
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break;
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#endif /* WOLFSSL_AES_128 && !NO_SHA */
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#ifdef WC_RC2
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case PBE_SHA1_40RC2_CBC:
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typeH = WC_SHA;
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derivedLen = 5;
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break;
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#endif
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default:
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WOLFSSL_MSG("Unknown/Unsupported encrypt/decrypt id");
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(void)shaOid;
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return ALGO_ID_E;
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}
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#ifdef WOLFSSL_SMALL_STACK
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key = (byte*)XMALLOC(MAX_KEY_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (key == NULL)
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return MEMORY_E;
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#endif
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if (version == PKCS5v2)
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ret = wc_PBKDF2(key, (byte*)password, passwordSz,
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salt, saltSz, iterations, derivedLen, typeH);
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#ifndef NO_SHA
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else if (version == PKCS5)
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ret = wc_PBKDF1(key, (byte*)password, passwordSz,
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salt, saltSz, iterations, derivedLen, typeH);
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#endif
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#ifdef HAVE_PKCS12
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else if (version == PKCS12v1) {
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int i, idx = 0;
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byte unicodePasswd[MAX_UNICODE_SZ];
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if ( (passwordSz * 2 + 2) > (int)sizeof(unicodePasswd)) {
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return UNICODE_SIZE_E;
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}
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for (i = 0; i < passwordSz; i++) {
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unicodePasswd[idx++] = 0x00;
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unicodePasswd[idx++] = (byte)password[i];
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}
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/* add trailing NULL */
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unicodePasswd[idx++] = 0x00;
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unicodePasswd[idx++] = 0x00;
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ret = wc_PKCS12_PBKDF(key, unicodePasswd, idx, salt, saltSz,
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iterations, derivedLen, typeH, 1);
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if (id != PBE_SHA1_RC4_128)
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ret += wc_PKCS12_PBKDF(cbcIv, unicodePasswd, idx, salt, saltSz,
|
|
iterations, 8, typeH, 2);
|
|
}
|
|
#endif /* HAVE_PKCS12 */
|
|
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
|
|
#if !defined(NO_AES) && defined(HAVE_AES_CBC)
|
|
#ifdef WOLFSSL_AES_256
|
|
case PBE_AES256_CBC:
|
|
case PBE_AES128_CBC:
|
|
{
|
|
#ifdef WOLFSSL_SMALL_STACK
|
|
Aes *aes;
|
|
aes = (Aes *)XMALLOC(sizeof *aes, NULL, DYNAMIC_TYPE_AES);
|
|
if (aes == NULL)
|
|
return MEMORY_E;
|
|
#else
|
|
Aes aes[1];
|
|
#endif
|
|
ret = wc_AesInit(aes, NULL, INVALID_DEVID);
|
|
if (ret == 0) {
|
|
if (enc) {
|
|
ret = wc_AesSetKey(aes, key, derivedLen, cbcIv,
|
|
AES_ENCRYPTION);
|
|
}
|
|
else {
|
|
ret = wc_AesSetKey(aes, key, derivedLen, cbcIv,
|
|
AES_DECRYPTION);
|
|
}
|
|
}
|
|
if (ret == 0) {
|
|
if (enc)
|
|
ret = wc_AesCbcEncrypt(aes, input, input, length);
|
|
else
|
|
ret = wc_AesCbcDecrypt(aes, input, input, length);
|
|
}
|
|
ForceZero(aes, sizeof(Aes));
|
|
#ifdef WOLFSSL_SMALL_STACK
|
|
XFREE(aes, NULL, DYNAMIC_TYPE_AES);
|
|
#endif
|
|
if (ret != 0) {
|
|
#ifdef WOLFSSL_SMALL_STACK
|
|
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
|
#endif
|
|
return ret;
|
|
}
|
|
break;
|
|
}
|
|
#endif /* WOLFSSL_AES_256 */
|
|
#endif /* !NO_AES && HAVE_AES_CBC */
|
|
#ifdef WC_RC2
|
|
case PBE_SHA1_40RC2_CBC:
|
|
{
|
|
Rc2 rc2;
|
|
/* effective key size for RC2-40-CBC is 40 bits */
|
|
ret = wc_Rc2SetKey(&rc2, key, derivedLen, cbcIv, 40);
|
|
if (ret == 0) {
|
|
if (enc)
|
|
ret = wc_Rc2CbcEncrypt(&rc2, input, input, length);
|
|
else
|
|
ret = wc_Rc2CbcDecrypt(&rc2, input, input, length);
|
|
}
|
|
if (ret != 0) {
|
|
#ifdef WOLFSSL_SMALL_STACK
|
|
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
|
#endif
|
|
return ret;
|
|
}
|
|
ForceZero(&rc2, sizeof(Rc2));
|
|
break;
|
|
}
|
|
#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 /* HAVE_PKCS8 || HAVE_PKCS12 */
|
|
#endif /* !NO_PWDBASED */
|