libidav/crypto.h

Sat, 01 Jun 2019 10:41:00 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 01 Jun 2019 10:41:00 +0200
branch
v1.2
changeset 754
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parent 481
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permissions
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Added tag v1.2.4 for changeset dcf751b270dd

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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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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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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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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 dav_seek_func seek;
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89 char *tmp;
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90 size_t tmplen;
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91 size_t tmpoff;
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92 int end;
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93 } AESEncrypter;
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95 int dav_rand_bytes(unsigned char *buf, size_t len);
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97 AESDecrypter* aes_decrypter_new(DavKey *key, void *stream, dav_write_func write_func);
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98 size_t aes_write(const void *buf, size_t s, size_t n, AESDecrypter *dec);
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99 void aes_decrypter_shutdown(AESDecrypter *dec);
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100 void aes_decrypter_close(AESDecrypter *dec);
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101
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102 AESEncrypter* aes_encrypter_new(DavKey *key, void *stream, dav_read_func read_func, dav_seek_func seek_func);
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103 size_t aes_read(void *buf, size_t s, size_t n, AESEncrypter *enc);
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104 void aes_encrypter_close(AESEncrypter *enc);
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105 int aes_encrypter_reset(AESEncrypter *enc, curl_off_t offset, int origin);
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107 char* aes_encrypt(char *in, size_t len, DavKey *key);
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108 char* aes_decrypt(char *in, size_t *len, DavKey *key);
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110 void dav_get_hash(DAV_SHA_CTX *sha256, unsigned char *buf);
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112 char* dav_create_hash(const char *data, size_t len);
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114 #ifdef __cplusplus
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115 }
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116 #endif
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118 #endif /* DAV_CRYPTO_H */
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119

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