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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2018 Olaf Wintermann. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #ifndef DAV_CRYPTO_H |
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30 | #define DAV_CRYPTO_H |
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31 | |
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32 | #include "webdav.h" |
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33 | #include <ucx/string.h> |
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34 | |
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35 | #ifdef __APPLE__ |
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36 | /* macos */ |
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37 | #define DAV_AES_CTX CCCryptorRef |
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38 | #define DAV_SHA_CTX CC_SHA256_CTX |
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39 | #define DAV_SHA256_DIGEST_LENGTH 32 |
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40 | |
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41 | #include <CommonCrypto/CommonCrypto.h> |
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42 | #include <CommonCrypto/CommonDigest.h> |
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43 | |
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44 | #else |
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45 | /* unix/linux and still windows */ |
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46 | #define DAV_AES_CTX EVP_CIPHER_CTX* |
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47 | #define DAV_SHA_CTX SHA256_CTX |
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48 | #define DAV_SHA256_DIGEST_LENGTH 32 |
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49 | |
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50 | #define DAV_USE_OPENSSL |
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51 | |
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52 | #include <openssl/evp.h> |
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53 | #include <openssl/rand.h> |
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54 | |
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55 | #if defined(__sun) && defined(__SunOS_5_10) |
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56 | #include <sha2.h> |
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57 | #define SHA256_Init SHA256Init |
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58 | #define SHA256_Update SHA256Update |
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59 | #define SHA256_Final SHA256Final |
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60 | #else |
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61 | #include <openssl/sha.h> |
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62 | #endif |
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63 | |
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64 | #endif |
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65 | |
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66 | #ifdef __cplusplus |
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67 | extern "C" { |
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68 | #endif |
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69 | |
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70 | typedef struct { |
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71 | DAV_AES_CTX ctx; |
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72 | DAV_SHA_CTX sha256; |
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73 | void *stream; |
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74 | dav_write_func write; |
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75 | DavKey *key; |
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76 | int init; |
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77 | unsigned char ivtmp[16]; |
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78 | size_t ivpos; |
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79 | } AESDecrypter; |
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80 | |
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81 | typedef struct { |
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82 | DAV_AES_CTX ctx; |
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83 | DAV_SHA_CTX sha256; |
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84 | void *iv; |
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85 | size_t ivlen; |
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86 | void *stream; |
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87 | dav_read_func read; |
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88 | char *tmp; |
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89 | size_t tmplen; |
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90 | size_t tmpoff; |
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91 | int end; |
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92 | } AESEncrypter; |
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93 | |
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94 | int dav_rand_bytes(unsigned char *buf, size_t len); |
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95 | |
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96 | AESDecrypter* aes_decrypter_new(DavKey *key, void *stream, dav_write_func write_func); |
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97 | size_t aes_write(const void *buf, size_t s, size_t n, AESDecrypter *dec); |
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98 | void aes_decrypter_shutdown(AESDecrypter *dec); |
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99 | void aes_decrypter_close(AESDecrypter *dec); |
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100 | |
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101 | AESEncrypter* aes_encrypter_new(DavKey *key, void *stream, dav_read_func read_func); |
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102 | size_t aes_read(void *buf, size_t s, size_t n, AESEncrypter *enc); |
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103 | void aes_encrypter_close(AESEncrypter *enc); |
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104 | |
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105 | char* aes_encrypt(char *in, size_t len, DavKey *key); |
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106 | char* aes_decrypt(char *in, size_t *len, DavKey *key); |
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107 | |
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108 | void dav_get_hash(DAV_SHA_CTX *sha256, unsigned char *buf); |
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109 | |
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110 | char* dav_create_hash(const char *data, size_t len); |
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111 | |
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112 | #ifdef __cplusplus |
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113 | } |
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114 | #endif |
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115 | |
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116 | #endif /* DAV_CRYPTO_H */ |
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117 |