Diff: wolfcrypt/src/wc_encrypt.c

Revision:

15:117db924cf7c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wolfcrypt/src/wc_encrypt.c	Sat Aug 18 22:20:43 2018 +0000
@@ -0,0 +1,606 @@
+/* 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 */
+