/src/libzip/lib/zip_crypto_openssl.c

Source
/*
  zip_crypto_openssl.c -- OpenSSL wrapper.
  Copyright (C) 2018-2024 Dieter Baron and Thomas Klausner

  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <info@libzip.org>

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:
  1. Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in
  the documentation and/or other materials provided with the
  distribution.
  3. The names of the authors may not be used to endorse or promote
  products derived from this software without specific prior
  written permission.

  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <stdlib.h>

#include "zipint.h"

#include "zip_crypto.h"

#include <limits.h>
#include <openssl/rand.h>

#ifdef USE_OPENSSL_3_API
static _zip_crypto_hmac_t *hmac_new() {
    _zip_crypto_hmac_t *hmac = (_zip_crypto_hmac_t *)malloc(sizeof(*hmac));
    if (hmac != NULL) {
        hmac->mac = NULL;
        hmac->ctx = NULL;
    }
    return hmac;
}
static void hmac_free(_zip_crypto_hmac_t *hmac) {
    if (hmac != NULL) {
        if (hmac->ctx != NULL) {
            EVP_MAC_CTX_free(hmac->ctx);
        }
        if (hmac->mac != NULL) {
            EVP_MAC_free(hmac->mac);
        }
        free(hmac);
    }
}
#endif

_zip_crypto_aes_t *_zip_crypto_aes_new(const zip_uint8_t *key, zip_uint16_t key_size, zip_error_t *error) {
    _zip_crypto_aes_t *aes;
    const EVP_CIPHER *cipher_type;

    switch (key_size) {
    case 128:
        cipher_type = EVP_aes_128_ecb();
        break;
    case 192:
        cipher_type = EVP_aes_192_ecb();
        break;
    case 256:
        cipher_type = EVP_aes_256_ecb();
        break;
    default:
        zip_error_set(error, ZIP_ER_INTERNAL, 0);
        return NULL;
    }

#ifdef USE_OPENSSL_1_0_API
    if ((aes = (_zip_crypto_aes_t *)malloc(sizeof(*aes))) == NULL) {
        zip_error_set(error, ZIP_ER_MEMORY, 0);
        return NULL;
    }
    memset(aes, 0, sizeof(*aes));
#else
    if ((aes = EVP_CIPHER_CTX_new()) == NULL) {
        zip_error_set(error, ZIP_ER_MEMORY, 0);
        return NULL;
    }
#endif

    if (EVP_EncryptInit_ex(aes, cipher_type, NULL, key, NULL) != 1) {
#ifdef USE_OPENSSL_1_0_API
        free(aes);
#else
        EVP_CIPHER_CTX_free(aes);
#endif
        zip_error_set(error, ZIP_ER_INTERNAL, 0);
        return NULL;
    }

    return aes;
}

void _zip_crypto_aes_free(_zip_crypto_aes_t *aes) {
    if (aes == NULL) {
        return;
    }

#ifdef USE_OPENSSL_1_0_API
    EVP_CIPHER_CTX_cleanup(aes);
    _zip_crypto_clear(aes, sizeof(*aes));
    free(aes);
#else
    EVP_CIPHER_CTX_free(aes);
#endif
}


bool _zip_crypto_aes_encrypt_block(_zip_crypto_aes_t *aes, const zip_uint8_t *in, zip_uint8_t *out) {
    int len = 0;
    if (EVP_EncryptUpdate(aes, out, &len, in, ZIP_CRYPTO_AES_BLOCK_LENGTH) != 1 || len != ZIP_CRYPTO_AES_BLOCK_LENGTH) {
        return false;
    }
    return true;
}


_zip_crypto_hmac_t *_zip_crypto_hmac_new(const zip_uint8_t *secret, zip_uint64_t secret_length, zip_error_t *error) {
    _zip_crypto_hmac_t *hmac;

    if (secret_length > INT_MAX) {
        zip_error_set(error, ZIP_ER_INVAL, 0);
        return NULL;
    }

#ifdef USE_OPENSSL_3_API
    if ((hmac = hmac_new()) == NULL || (hmac->mac = EVP_MAC_fetch(NULL, "HMAC", "provider=default")) == NULL || (hmac->ctx = EVP_MAC_CTX_new(hmac->mac)) == NULL) {
        hmac_free(hmac);
        zip_error_set(error, ZIP_ER_MEMORY, 0);
        return NULL;
    }

    {
        OSSL_PARAM params[2];
        params[0] = OSSL_PARAM_construct_utf8_string("digest", "SHA1", 0);
        params[1] = OSSL_PARAM_construct_end();

        if (!EVP_MAC_init(hmac->ctx, (const unsigned char *)secret, secret_length, params)) {
            zip_error_set(error, ZIP_ER_INTERNAL, 0);
            hmac_free(hmac);
            return NULL;
        }
    }
#else
#ifdef USE_OPENSSL_1_0_API
    if ((hmac = (_zip_crypto_hmac_t *)malloc(sizeof(*hmac))) == NULL) {
        zip_error_set(error, ZIP_ER_MEMORY, 0);
        return NULL;
    }

    HMAC_CTX_init(hmac);
#else
    if ((hmac = HMAC_CTX_new()) == NULL) {
        zip_error_set(error, ZIP_ER_MEMORY, 0);
        return NULL;
    }
#endif

    if (HMAC_Init_ex(hmac, secret, (int)secret_length, EVP_sha1(), NULL) != 1) {
        zip_error_set(error, ZIP_ER_INTERNAL, 0);
#ifdef USE_OPENSSL_1_0_API
        free(hmac);
#else
        HMAC_CTX_free(hmac);
#endif
        return NULL;
    }
#endif

    return hmac;
}


void _zip_crypto_hmac_free(_zip_crypto_hmac_t *hmac) {
    if (hmac == NULL) {
        return;
    }

#if defined(USE_OPENSSL_3_API)
    hmac_free(hmac);
#elif defined(USE_OPENSSL_1_0_API)
    HMAC_CTX_cleanup(hmac);
    _zip_crypto_clear(hmac, sizeof(*hmac));
    free(hmac);
#else
    HMAC_CTX_free(hmac);
#endif
}


bool _zip_crypto_hmac_output(_zip_crypto_hmac_t *hmac, zip_uint8_t *data) {
#ifdef USE_OPENSSL_3_API
    size_t length = 0;
    return EVP_MAC_final(hmac->ctx, data, &length, ZIP_CRYPTO_SHA1_LENGTH) == 1 && length == ZIP_CRYPTO_SHA1_LENGTH;
#else
    unsigned int length = 0;
    return HMAC_Final(hmac, data, &length) == 1 && length == ZIP_CRYPTO_SHA1_LENGTH;
#endif
}


bool zip_secure_random(zip_uint8_t *buffer, zip_uint16_t length) {
    return RAND_bytes(buffer, length) == 1;
}

Coverage Report

Created: 2026-07-30 07:17

Line	Count	Source
1		/*
2		zip_crypto_openssl.c -- OpenSSL wrapper.
3		Copyright (C) 2018-2024 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		#ifdef USE_OPENSSL_3_API
44		static _zip_crypto_hmac_t *hmac_new() {
45		_zip_crypto_hmac_t hmac = (_zip_crypto_hmac_t )malloc(sizeof(*hmac));
46		if (hmac != NULL) {
47		hmac->mac = NULL;
48		hmac->ctx = NULL;
49		}
50		return hmac;
51		}
52		static void hmac_free(_zip_crypto_hmac_t *hmac) {
53		if (hmac != NULL) {
54		if (hmac->ctx != NULL) {
55		EVP_MAC_CTX_free(hmac->ctx);
56		}
57		if (hmac->mac != NULL) {
58		EVP_MAC_free(hmac->mac);
59		}
60		free(hmac);
61		}
62		}
63		#endif
64
65	0	_zip_crypto_aes_t _zip_crypto_aes_new(const zip_uint8_t key, zip_uint16_t key_size, zip_error_t *error) {
66	0	_zip_crypto_aes_t *aes;
67	0	const EVP_CIPHER *cipher_type;
68
69	0	switch (key_size) {
70	0	case 128:
71	0	cipher_type = EVP_aes_128_ecb();
72	0	break;
73	0	case 192:
74	0	cipher_type = EVP_aes_192_ecb();
75	0	break;
76	0	case 256:
77	0	cipher_type = EVP_aes_256_ecb();
78	0	break;
79	0	default:
80	0	zip_error_set(error, ZIP_ER_INTERNAL, 0);
81	0	return NULL;
82	0	}
83
84		#ifdef USE_OPENSSL_1_0_API
85		if ((aes = (_zip_crypto_aes_t )malloc(sizeof(aes))) == NULL) {
86		zip_error_set(error, ZIP_ER_MEMORY, 0);
87		return NULL;
88		}
89		memset(aes, 0, sizeof(*aes));
90		#else
91	0	if ((aes = EVP_CIPHER_CTX_new()) == NULL) {
92	0	zip_error_set(error, ZIP_ER_MEMORY, 0);
93	0	return NULL;
94	0	}
95	0	#endif
96
97	0	if (EVP_EncryptInit_ex(aes, cipher_type, NULL, key, NULL) != 1) {
98		#ifdef USE_OPENSSL_1_0_API
99		free(aes);
100		#else
101	0	EVP_CIPHER_CTX_free(aes);
102	0	#endif
103	0	zip_error_set(error, ZIP_ER_INTERNAL, 0);
104	0	return NULL;
105	0	}
106
107	0	return aes;
108	0	}
109
110	0	void _zip_crypto_aes_free(_zip_crypto_aes_t *aes) {
111	0	if (aes == NULL) {
112	0	return;
113	0	}
114
115		#ifdef USE_OPENSSL_1_0_API
116		EVP_CIPHER_CTX_cleanup(aes);
117		_zip_crypto_clear(aes, sizeof(*aes));
118		free(aes);
119		#else
120	0	EVP_CIPHER_CTX_free(aes);
121	0	#endif
122	0	}
123
124
125	0	bool _zip_crypto_aes_encrypt_block(_zip_crypto_aes_t aes, const zip_uint8_t in, zip_uint8_t *out) {
126	0	int len = 0;
127	0	if (EVP_EncryptUpdate(aes, out, &len, in, ZIP_CRYPTO_AES_BLOCK_LENGTH) != 1 \|\| len != ZIP_CRYPTO_AES_BLOCK_LENGTH) {
128	0	return false;
129	0	}
130	0	return true;
131	0	}
132
133
134	0	_zip_crypto_hmac_t _zip_crypto_hmac_new(const zip_uint8_t secret, zip_uint64_t secret_length, zip_error_t *error) {
135	0	_zip_crypto_hmac_t *hmac;
136
137	0	if (secret_length > INT_MAX) {
138	0	zip_error_set(error, ZIP_ER_INVAL, 0);
139	0	return NULL;
140	0	}
141
142		#ifdef USE_OPENSSL_3_API
143		if ((hmac = hmac_new()) == NULL \|\| (hmac->mac = EVP_MAC_fetch(NULL, "HMAC", "provider=default")) == NULL \|\| (hmac->ctx = EVP_MAC_CTX_new(hmac->mac)) == NULL) {
144		hmac_free(hmac);
145		zip_error_set(error, ZIP_ER_MEMORY, 0);
146		return NULL;
147		}
148
149		{
150		OSSL_PARAM params[2];
151		params[0] = OSSL_PARAM_construct_utf8_string("digest", "SHA1", 0);
152		params[1] = OSSL_PARAM_construct_end();
153
154		if (!EVP_MAC_init(hmac->ctx, (const unsigned char *)secret, secret_length, params)) {
155		zip_error_set(error, ZIP_ER_INTERNAL, 0);
156		hmac_free(hmac);
157		return NULL;
158		}
159		}
160		#else
161		#ifdef USE_OPENSSL_1_0_API
162		if ((hmac = (_zip_crypto_hmac_t )malloc(sizeof(hmac))) == NULL) {
163		zip_error_set(error, ZIP_ER_MEMORY, 0);
164		return NULL;
165		}
166
167		HMAC_CTX_init(hmac);
168		#else
169	0	if ((hmac = HMAC_CTX_new()) == NULL) {
170	0	zip_error_set(error, ZIP_ER_MEMORY, 0);
171	0	return NULL;
172	0	}
173	0	#endif
174
175	0	if (HMAC_Init_ex(hmac, secret, (int)secret_length, EVP_sha1(), NULL) != 1) {
176	0	zip_error_set(error, ZIP_ER_INTERNAL, 0);
177		#ifdef USE_OPENSSL_1_0_API
178		free(hmac);
179		#else
180	0	HMAC_CTX_free(hmac);
181	0	#endif
182	0	return NULL;
183	0	}
184	0	#endif
185
186	0	return hmac;
187	0	}
188
189
190	0	void _zip_crypto_hmac_free(_zip_crypto_hmac_t *hmac) {
191	0	if (hmac == NULL) {
192	0	return;
193	0	}
194
195		#if defined(USE_OPENSSL_3_API)
196		hmac_free(hmac);
197		#elif defined(USE_OPENSSL_1_0_API)
198		HMAC_CTX_cleanup(hmac);
199		_zip_crypto_clear(hmac, sizeof(*hmac));
200		free(hmac);
201		#else
202	0	HMAC_CTX_free(hmac);
203	0	#endif
204	0	}
205
206
207	0	bool _zip_crypto_hmac_output(_zip_crypto_hmac_t hmac, zip_uint8_t data) {
208		#ifdef USE_OPENSSL_3_API
209		size_t length = 0;
210		return EVP_MAC_final(hmac->ctx, data, &length, ZIP_CRYPTO_SHA1_LENGTH) == 1 && length == ZIP_CRYPTO_SHA1_LENGTH;
211		#else
212	0	unsigned int length = 0;
213	0	return HMAC_Final(hmac, data, &length) == 1 && length == ZIP_CRYPTO_SHA1_LENGTH;
214	0	#endif
215	0	}
216
217
218	0	bool zip_secure_random(zip_uint8_t *buffer, zip_uint16_t length) {
219	0	return RAND_bytes(buffer, length) == 1;
220	0	}