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unix-like reverse engineering framework and cli tools
zip_crypto_openssl.c
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1 /*
2  zip_crypto_openssl.c -- OpenSSL wrapper.
3  Copyright (C) 2018-2021 Dieter Baron and Thomas Klausner
4 
5  This file is part of libzip, a library to manipulate ZIP archives.
6  The authors can be contacted at <info@libzip.org>
7 
8  Redistribution and use in source and binary forms, with or without
9  modification, are permitted provided that the following conditions
10  are met:
11  1. Redistributions of source code must retain the above copyright
12  notice, this list of conditions and the following disclaimer.
13  2. Redistributions in binary form must reproduce the above copyright
14  notice, this list of conditions and the following disclaimer in
15  the documentation and/or other materials provided with the
16  distribution.
17  3. The names of the authors may not be used to endorse or promote
18  products derived from this software without specific prior
19  written permission.
20 
21  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
22  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
25  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
29  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
31  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33 
34 #include <stdlib.h>
35 
36 #include "zipint.h"
37 
38 #include "zip_crypto.h"
39 
40 #include <limits.h>
41 #include <openssl/rand.h>
42 
43 #if OPENSSL_VERSION_NUMBER < 0x1010000fL || (defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x02070000fL)
44 #define USE_OPENSSL_1_0_API
45 #endif
46 
47 
50  _zip_crypto_aes_t *aes;
51  const EVP_CIPHER* cipher_type;
52 
53  switch (key_size) {
54  case 128:
55  cipher_type = EVP_aes_128_ecb();
56  break;
57  case 192:
58  cipher_type = EVP_aes_192_ecb();
59  break;
60  case 256:
61  cipher_type = EVP_aes_256_ecb();
62  break;
63  default:
65  return NULL;
66  }
67 
68 #ifdef USE_OPENSSL_1_0_API
69  if ((aes = (_zip_crypto_aes_t *)malloc(sizeof(*aes))) == NULL) {
71  return NULL;
72  }
73  memset(aes, 0, sizeof(*aes));
74 #else
75  if ((aes = EVP_CIPHER_CTX_new()) == NULL) {
77  return NULL;
78  }
79 #endif
80 
81  if (EVP_EncryptInit_ex(aes, cipher_type, NULL, key, NULL) != 1) {
82 #ifdef USE_OPENSSL_1_0_API
83  free(aes);
84 #else
85  EVP_CIPHER_CTX_free(aes);
86 #endif
88  return NULL;
89  }
90 
91  return aes;
92 }
93 
94 void
96  if (aes == NULL) {
97  return;
98  }
99 
100 #ifdef USE_OPENSSL_1_0_API
101  EVP_CIPHER_CTX_cleanup(aes);
102  _zip_crypto_clear(aes, sizeof(*aes));
103  free(aes);
104 #else
105  EVP_CIPHER_CTX_free(aes);
106 #endif
107 }
108 
109 
110 bool
112  int len;
113  if (EVP_EncryptUpdate(aes, out, &len, in, ZIP_CRYPTO_AES_BLOCK_LENGTH) != 1) {
114  return false;
115  }
116  return true;
117 }
118 
119 
122  _zip_crypto_hmac_t *hmac;
123 
124  if (secret_length > INT_MAX) {
126  return NULL;
127  }
128 
129 #ifdef USE_OPENSSL_1_0_API
130  if ((hmac = (_zip_crypto_hmac_t *)malloc(sizeof(*hmac))) == NULL) {
132  return NULL;
133  }
134 
135  HMAC_CTX_init(hmac);
136 #else
137  if ((hmac = HMAC_CTX_new()) == NULL) {
139  return NULL;
140  }
141 #endif
142 
143  if (HMAC_Init_ex(hmac, secret, (int)secret_length, EVP_sha1(), NULL) != 1) {
145 #ifdef USE_OPENSSL_1_0_API
146  free(hmac);
147 #else
148  HMAC_CTX_free(hmac);
149 #endif
150  return NULL;
151  }
152 
153  return hmac;
154 }
155 
156 
157 void
159  if (hmac == NULL) {
160  return;
161  }
162 
163 #ifdef USE_OPENSSL_1_0_API
164  HMAC_CTX_cleanup(hmac);
165  _zip_crypto_clear(hmac, sizeof(*hmac));
166  free(hmac);
167 #else
168  HMAC_CTX_free(hmac);
169 #endif
170 }
171 
172 
173 bool
175  unsigned int length;
176 
177  return HMAC_Final(hmac, data, &length) == 1;
178 }
179 
180 
181 ZIP_EXTERN bool
183  return RAND_bytes(buffer, length) == 1;
184 }
size_t len
Definition: 6502dis.c:15
const lzma_allocator const uint8_t * in
Definition: block.h:527
const lzma_allocator const uint8_t size_t uint8_t * out
Definition: block.h:528
#define INT_MAX
Definition: cp-demangle.c:131
#define NULL
Definition: cris-opc.c:27
static static sync static getppid static getegid const char static filename char static len const char char static bufsiz static mask static vfork const void static prot static getpgrp const char static swapflags static arg static fd static protocol static who struct sockaddr static addrlen static backlog struct timeval struct timezone static tz const struct iovec static count static mode const void const struct sockaddr static tolen const char static pathname void static offset struct stat static buf void long static basep static whence static length const void static len key
Definition: sflib.h:118
static static sync static getppid static getegid const char static filename char static len const char char static bufsiz static mask static vfork const void static prot static getpgrp const char static swapflags static arg static fd static protocol static who struct sockaddr static addrlen static backlog struct timeval struct timezone static tz const struct iovec static count static mode const void const struct sockaddr static tolen const char static pathname void static offset struct stat static buf void long static basep static whence static length const void static len static semflg const void static shmflg const struct timespec struct timespec static rem const char static group const void length
Definition: sflib.h:133
RZ_API void Ht_() free(HtName_(Ht) *ht)
Definition: ht_inc.c:130
return memset(p, 0, total)
#define ZIP_ER_INTERNAL
Definition: zip.h:125
ZIP_EXTERN void zip_error_set(zip_error_t *_Nullable, int, int)
Definition: zip_error.c:126
#define ZIP_ER_MEMORY
Definition: zip.h:119
#define ZIP_EXTERN
Definition: zip.h:54
#define ZIP_ER_INVAL
Definition: zip.h:123
void * malloc(size_t size)
Definition: malloc.c:123
Definition: buffer.h:15
Definition: zip.h:284
void error(const char *msg)
Definition: untgz.c:593
#define ZIP_CRYPTO_AES_BLOCK_LENGTH
Definition: zip_crypto.h:38
bool _zip_crypto_hmac_output(_zip_crypto_hmac_t *hmac, zip_uint8_t *data)
bool _zip_crypto_aes_encrypt_block(_zip_crypto_aes_t *aes, const zip_uint8_t *in, zip_uint8_t *out)
void _zip_crypto_hmac_free(_zip_crypto_hmac_t *hmac)
void _zip_crypto_aes_free(_zip_crypto_aes_t *aes)
_zip_crypto_aes_t * _zip_crypto_aes_new(const zip_uint8_t *key, zip_uint16_t key_size, zip_error_t *error)
ZIP_EXTERN bool zip_secure_random(zip_uint8_t *buffer, zip_uint16_t length)
_zip_crypto_hmac_t * _zip_crypto_hmac_new(const zip_uint8_t *secret, zip_uint64_t secret_length, zip_error_t *error)
uint64_t zip_uint64_t
Definition: zipconf.h:39
uint8_t zip_uint8_t
Definition: zipconf.h:33
uint16_t zip_uint16_t
Definition: zipconf.h:35
#define _zip_crypto_clear(b, l)
Definition: zipint.h:489