comparison: libidav/crypto.h
libidav/crypto.h
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2018 Olaf Wintermann. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #ifndef DAV_CRYPTO_H | |
| 30 #define DAV_CRYPTO_H | |
| 31 | |
| 32 #include "webdav.h" | |
| 33 #include <cx/string.h> | |
| 34 | |
| 35 #ifdef __APPLE__ | |
| 36 /* macos */ | |
| 37 | |
| 38 #define DAV_CRYPTO_COMMON_CRYPTO | |
| 39 | |
| 40 #define DAV_AES_CTX CCCryptorRef | |
| 41 #define DAV_SHA_CTX CC_SHA256_CTX | |
| 42 #define DAV_SHA256_DIGEST_LENGTH 32 | |
| 43 | |
| 44 #include <CommonCrypto/CommonCrypto.h> | |
| 45 #include <CommonCrypto/CommonDigest.h> | |
| 46 | |
| 47 #elif defined(_WIN32) | |
| 48 | |
| 49 #define DAV_CRYPTO_CNG | |
| 50 | |
| 51 #include <windows.h> | |
| 52 #include <bcrypt.h> | |
| 53 | |
| 54 typedef struct WinBCryptCTX { | |
| 55 BCRYPT_ALG_HANDLE hAlg; | |
| 56 BCRYPT_KEY_HANDLE hKey; | |
| 57 void *pbKeyObject; | |
| 58 unsigned char pbIV[16]; | |
| 59 | |
| 60 unsigned char buf[16]; | |
| 61 ULONG buflen; | |
| 62 } WinBCryptCTX; | |
| 63 | |
| 64 typedef struct WinBCryptSHACTX { | |
| 65 BCRYPT_ALG_HANDLE hAlg; | |
| 66 BCRYPT_HASH_HANDLE hHash; | |
| 67 void *pbHashObject; | |
| 68 } WinBCryptSHACTX; | |
| 69 | |
| 70 #define DAV_AES_CTX WinBCryptCTX | |
| 71 #define DAV_SHA_CTX WinBCryptSHACTX | |
| 72 #define DAV_SHA256_DIGEST_LENGTH 32 | |
| 73 | |
| 74 #else | |
| 75 /* unix/linux */ | |
| 76 | |
| 77 #define DAV_USE_OPENSSL | |
| 78 | |
| 79 #define DAV_AES_CTX EVP_CIPHER_CTX* | |
| 80 #define DAV_SHA_CTX SHA256_CTX | |
| 81 #define DAV_SHA256_DIGEST_LENGTH 32 | |
| 82 | |
| 83 #include <openssl/evp.h> | |
| 84 #include <openssl/rand.h> | |
| 85 | |
| 86 #if defined(__sun) && defined(__SunOS_5_10) | |
| 87 #include <sha2.h> | |
| 88 #define SHA256_Init SHA256Init | |
| 89 #define SHA256_Update SHA256Update | |
| 90 #define SHA256_Final SHA256Final | |
| 91 #else | |
| 92 #include <openssl/sha.h> | |
| 93 #endif | |
| 94 | |
| 95 #endif | |
| 96 | |
| 97 #ifdef __cplusplus | |
| 98 extern "C" { | |
| 99 #endif | |
| 100 | |
| 101 #define DAV_PWFUNC_PBKDF2_SHA256 0 | |
| 102 #define DAV_PWFUNC_PBKDF2_SHA512 1 | |
| 103 | |
| 104 #define DAV_CRYPTO_ITERATION_COUNT 4000 | |
| 105 | |
| 106 typedef struct { | |
| 107 DAV_AES_CTX ctx; | |
| 108 DAV_SHA_CTX sha256; | |
| 109 void *stream; | |
| 110 dav_write_func write; | |
| 111 DavKey *key; | |
| 112 int init; | |
| 113 unsigned char ivtmp[16]; | |
| 114 size_t ivpos; | |
| 115 } AESDecrypter; | |
| 116 | |
| 117 typedef struct { | |
| 118 DAV_AES_CTX ctx; | |
| 119 DAV_SHA_CTX sha256; | |
| 120 void *iv; | |
| 121 size_t ivlen; | |
| 122 void *stream; | |
| 123 dav_read_func read; | |
| 124 dav_seek_func seek; | |
| 125 char *tmp; | |
| 126 size_t tmplen; | |
| 127 size_t tmpoff; | |
| 128 int end; | |
| 129 } AESEncrypter; | |
| 130 | |
| 131 typedef struct DavHashContext DavHashContext; | |
| 132 | |
| 133 int dav_rand_bytes(unsigned char *buf, size_t len); | |
| 134 | |
| 135 AESDecrypter* aes_decrypter_new(DavKey *key, void *stream, dav_write_func write_func); | |
| 136 size_t aes_write(const void *buf, size_t s, size_t n, AESDecrypter *dec); | |
| 137 void aes_decrypter_shutdown(AESDecrypter *dec); | |
| 138 void aes_decrypter_close(AESDecrypter *dec); | |
| 139 | |
| 140 AESEncrypter* aes_encrypter_new(DavKey *key, void *stream, dav_read_func read_func, dav_seek_func seek_func); | |
| 141 size_t aes_read(void *buf, size_t s, size_t n, AESEncrypter *enc); | |
| 142 void aes_encrypter_close(AESEncrypter *enc); | |
| 143 int aes_encrypter_reset(AESEncrypter *enc, curl_off_t offset, int origin); | |
| 144 | |
| 145 char* aes_encrypt(const char *in, size_t len, DavKey *key); | |
| 146 char* aes_decrypt(const char *in, size_t *len, DavKey *key); | |
| 147 | |
| 148 void dav_get_hash(DAV_SHA_CTX *sha256, unsigned char *buf); | |
| 149 | |
| 150 char* dav_create_hash(const char *data, size_t len); | |
| 151 | |
| 152 DAV_SHA_CTX* dav_hash_init(void); | |
| 153 void dav_hash_update(DAV_SHA_CTX *ctx, const char *data, size_t len); | |
| 154 void dav_hash_final(DAV_SHA_CTX *ctx, unsigned char *buf); | |
| 155 | |
| 156 DavKey* dav_pw2key(const char *password, const unsigned char *salt, int saltlen, int pwfunc, int enc); | |
| 157 | |
| 158 CxBuffer* aes_encrypt_buffer(CxBuffer *in, DavKey *key); | |
| 159 CxBuffer* aes_decrypt_buffer(CxBuffer *in, DavKey *key); | |
| 160 | |
| 161 #ifdef __cplusplus | |
| 162 } | |
| 163 #endif | |
| 164 | |
| 165 #endif /* DAV_CRYPTO_H */ | |
| 166 |
