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- /* wc_encrypt.c
- *
- * Copyright (C) 2006-2020 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/rc2.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;
- #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 */
- #if !defined(NO_DES3) && !defined(WOLFSSL_TI_CRYPT)
- 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;
- #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;
- #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;
- #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;
- #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 */
- #if !defined(NO_ASN) && defined(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_SYMMETRIC_KEY);
- if (key == NULL) {
- return MEMORY_E;
- }
- #endif
- (void)XMEMSET(key, 0, WC_MAX_SYM_KEY_SIZE);
- #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_SYMMETRIC_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_SYMMETRIC_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_SYMMETRIC_KEY);
- if (key == NULL) {
- return MEMORY_E;
- }
- #endif /* WOLFSSL_SMALL_STACK */
- (void)XMEMSET(key, 0, WC_MAX_SYM_KEY_SIZE);
- #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_SYMMETRIC_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 */
- #if !defined(NO_AES) && defined(HAVE_AES_CBC)
- if (info->cipherType == WC_CIPHER_AES_CBC)
- ret = wc_AesCbcEncryptWithKey(der, der, derSz, key, info->keySz,
- info->iv);
- #endif /* !NO_AES && HAVE_AES_CBC */
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(key, NULL, DYNAMIC_TYPE_SYMMETRIC_KEY);
- #endif
- return ret;
- }
- #endif /* !NO_ASN && WOLFSSL_ENCRYPTED_KEYS */
- #if !defined(NO_PWDBASED) && !defined(NO_ASN)
- #if defined(HAVE_PKCS8) || defined(HAVE_PKCS12)
- /* 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 shaOid)
- {
- int typeH = WC_HASH_TYPE_NONE;
- int derivedLen = 0;
- 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:
- switch(shaOid) {
- case HMAC_SHA256_OID:
- typeH = WC_SHA256;
- derivedLen = 32;
- break;
- default:
- typeH = WC_SHA;
- derivedLen = 32; /* may need iv for v1.5 */
- break;
- }
- 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
- #if defined(WOLFSSL_AES_256)
- case PBE_AES256_CBC:
- switch(shaOid) {
- case HMAC_SHA256_OID:
- typeH = WC_SHA256;
- derivedLen = 32;
- break;
- #ifndef NO_SHA
- default:
- typeH = WC_SHA;
- derivedLen = 32;
- break;
- #endif
- }
- break;
- #endif /* WOLFSSL_AES_256 && !NO_SHA */
- #if defined(WOLFSSL_AES_128)
- case PBE_AES128_CBC:
- switch(shaOid) {
- case HMAC_SHA256_OID:
- typeH = WC_SHA256;
- derivedLen = 16;
- break;
- #ifndef NO_SHA
- default:
- typeH = WC_SHA;
- derivedLen = 16;
- break;
- #endif
- }
- break;
- #endif /* WOLFSSL_AES_128 && !NO_SHA */
- #ifdef WC_RC2
- case PBE_SHA1_40RC2_CBC:
- typeH = WC_SHA;
- derivedLen = 5;
- break;
- #endif
- default:
- WOLFSSL_MSG("Unknown/Unsupported encrypt/decrypt id");
- (void)shaOid;
- 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
- #ifdef HAVE_PKCS12
- 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);
- }
- #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 */
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