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minizip-ng/mz_crypt_brg.c
Nathan Moinvaziri 17447aac42
Merge pull request #413 from philippec-ls/master 
Added missing newlines
2019-09-05 18:18:46 -07:00

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/* mz_crypt_brg.c -- Crypto/hash functions using Brian Gladman's library
Version 2.8.9, July 4, 2019
part of the MiniZip project
Copyright (C) 2010-2019 Nathan Moinvaziri
https://github.com/nmoinvaz/minizip
This program is distributed under the terms of the same license as zlib.
See the accompanying LICENSE file for the full text of the license.
*/
#include "mz.h"
#include "mz_os.h"
#if defined(HAVE_GETRANDOM)
# include <sys/random.h>
#endif
#if defined(HAVE_LIBBSD)
# include <sys/types.h>
# ifndef __u_char_defined
typedef unsigned char u_char;
# endif
# include <bsd/stdlib.h> /* arc4random_buf */
#endif
#include "aes.h"
#include "sha1.h"
#include "sha2.h"
#include "hmac.h"
/***************************************************************************/
#if defined(HAVE_ARC4RANDOM_BUF)
int32_t mz_crypt_rand(uint8_t *buf, int32_t size)
{
if (size < 0)
return 0;
arc4random_buf(buf, (uint32_t)size);
return size;
}
#elif defined(HAVE_ARC4RANDOM)
int32_t mz_crypt_rand(uint8_t *buf, int32_t size)
{
int32_t left = size;
for (; left > 2; left -= 3, buf += 3)
{
uint32_t val = arc4random();
buf[0] = (val) & 0xFF;
buf[1] = (val >> 8) & 0xFF;
buf[2] = (val >> 16) & 0xFF;
}
for (; left > 0; left--, buf++)
{
*buf = arc4random() & 0xFF;
}
return size - left;
}
#elif defined(HAVE_GETRANDOM)
int32_t mz_crypt_rand(uint8_t *buf, int32_t size)
{
int32_t left = size;
int32_t written = 0;
while (left > 0)
{
written = getrandom(buf, left, 0);
if (written < 0)
return MZ_INTERNAL_ERROR;
buf += written;
left -= written;
}
return size - left;
}
#else
#if !defined(FORCE_LOWQUALITY_ENTROPY)
#pragma message("Warning: Low quality entropy function used for encryption")
#endif
int32_t mz_crypt_rand(uint8_t *buf, int32_t size)
{
return mz_os_rand(buf, size);
}
#endif
/***************************************************************************/
typedef struct mz_crypt_sha_s {
sha256_ctx ctx256;
sha1_ctx ctx1;
int32_t initialized;
uint16_t algorithm;
} mz_crypt_sha;
/***************************************************************************/
void mz_crypt_sha_reset(void *handle)
{
mz_crypt_sha *sha = (mz_crypt_sha *)handle;
sha->initialized = 0;
}
int32_t mz_crypt_sha_begin(void *handle)
{
mz_crypt_sha *sha = (mz_crypt_sha *)handle;
if (sha == NULL)
return MZ_PARAM_ERROR;
if (sha->algorithm == MZ_HASH_SHA1)
sha1_begin(&sha->ctx1);
else
sha256_begin(&sha->ctx256);
sha->initialized = 1;
return MZ_OK;
}
int32_t mz_crypt_sha_update(void *handle, const void *buf, int32_t size)
{
mz_crypt_sha *sha = (mz_crypt_sha *)handle;
if (sha == NULL || buf == NULL || !sha->initialized)
return MZ_PARAM_ERROR;
if (sha->algorithm == MZ_HASH_SHA1)
sha1_hash(buf, size, &sha->ctx1);
else
sha256_hash(buf, size, &sha->ctx256);
return size;
}
int32_t mz_crypt_sha_end(void *handle, uint8_t *digest, int32_t digest_size)
{
mz_crypt_sha *sha = (mz_crypt_sha *)handle;
if (sha == NULL || digest == NULL || !sha->initialized)
return MZ_PARAM_ERROR;
if (sha->algorithm == MZ_HASH_SHA1)
{
if (digest_size < MZ_HASH_SHA1_SIZE)
return MZ_BUF_ERROR;
sha1_end(digest, &sha->ctx1);
}
else
{
if (digest_size < MZ_HASH_SHA256_SIZE)
return MZ_BUF_ERROR;
sha256_end(digest, &sha->ctx256);
}
return MZ_OK;
}
void mz_crypt_sha_set_algorithm(void *handle, uint16_t algorithm)
{
mz_crypt_sha *sha = (mz_crypt_sha *)handle;
sha->algorithm = algorithm;
}
void *mz_crypt_sha_create(void **handle)
{
mz_crypt_sha *sha = NULL;
sha = (mz_crypt_sha *)MZ_ALLOC(sizeof(mz_crypt_sha));
if (sha != NULL)
{
memset(sha, 0, sizeof(mz_crypt_sha));
sha->algorithm = MZ_HASH_SHA256;
}
if (handle != NULL)
*handle = sha;
return sha;
}
void mz_crypt_sha_delete(void **handle)
{
mz_crypt_sha *sha = NULL;
if (handle == NULL)
return;
sha = (mz_crypt_sha *)*handle;
if (sha != NULL)
{
mz_crypt_sha_reset(*handle);
MZ_FREE(sha);
}
*handle = NULL;
}
/***************************************************************************/
typedef struct mz_crypt_aes_s {
aes_encrypt_ctx encrypt_ctx;
aes_decrypt_ctx decrypt_ctx;
int32_t mode;
int32_t error;
} mz_crypt_aes;
/***************************************************************************/
void mz_crypt_aes_reset(void *handle)
{
MZ_UNUSED(handle);
}
int32_t mz_crypt_aes_encrypt(void *handle, uint8_t *buf, int32_t size)
{
mz_crypt_aes *aes = (mz_crypt_aes *)handle;
if (aes == NULL || buf == NULL)
return MZ_PARAM_ERROR;
if (size != MZ_AES_BLOCK_SIZE)
return MZ_PARAM_ERROR;
aes->error = aes_encrypt(buf, buf, &aes->encrypt_ctx);
if (aes->error)
return MZ_CRYPT_ERROR;
return size;
}
int32_t mz_crypt_aes_decrypt(void *handle, uint8_t *buf, int32_t size)
{
mz_crypt_aes *aes = (mz_crypt_aes *)handle;
if (aes == NULL || buf == NULL)
return MZ_PARAM_ERROR;
if (size != MZ_AES_BLOCK_SIZE)
return MZ_PARAM_ERROR;
aes->error = aes_decrypt(buf, buf, &aes->decrypt_ctx);
if (aes->error)
return MZ_CRYPT_ERROR;
return size;
}
int32_t mz_crypt_aes_set_encrypt_key(void *handle, const void *key, int32_t key_length)
{
mz_crypt_aes *aes = (mz_crypt_aes *)handle;
if (aes == NULL || key == NULL)
return MZ_PARAM_ERROR;
mz_crypt_aes_reset(handle);
aes->error = aes_encrypt_key(key, key_length, &aes->encrypt_ctx);
if (aes->error)
return MZ_HASH_ERROR;
return MZ_OK;
}
int32_t mz_crypt_aes_set_decrypt_key(void *handle, const void *key, int32_t key_length)
{
mz_crypt_aes *aes = (mz_crypt_aes *)handle;
if (aes == NULL || key == NULL)
return MZ_PARAM_ERROR;
mz_crypt_aes_reset(handle);
aes->error = aes_decrypt_key(key, key_length, &aes->decrypt_ctx);
if (aes->error)
return MZ_HASH_ERROR;
return MZ_OK;
}
void mz_crypt_aes_set_mode(void *handle, int32_t mode)
{
mz_crypt_aes *aes = (mz_crypt_aes *)handle;
aes->mode = mode;
}
void *mz_crypt_aes_create(void **handle)
{
mz_crypt_aes *aes = NULL;
aes = (mz_crypt_aes *)MZ_ALLOC(sizeof(mz_crypt_aes));
if (aes != NULL)
memset(aes, 0, sizeof(mz_crypt_aes));
if (handle != NULL)
*handle = aes;
return aes;
}
void mz_crypt_aes_delete(void **handle)
{
mz_crypt_aes *aes = NULL;
if (handle == NULL)
return;
aes = (mz_crypt_aes *)*handle;
if (aes != NULL)
MZ_FREE(aes);
*handle = NULL;
}
/***************************************************************************/
typedef struct mz_crypt_hmac_s {
hmac_ctx ctx;
int32_t initialized;
int32_t error;
uint16_t algorithm;
} mz_crypt_hmac;
/***************************************************************************/
void mz_crypt_hmac_reset(void *handle)
{
mz_crypt_hmac *hmac = (mz_crypt_hmac *)handle;
hmac->error = 0;
}
int32_t mz_crypt_hmac_init(void *handle, const void *key, int32_t key_length)
{
mz_crypt_hmac *hmac = (mz_crypt_hmac *)handle;
if (hmac == NULL)
return MZ_PARAM_ERROR;
mz_crypt_hmac_reset(handle);
if (hmac->algorithm == MZ_HASH_SHA1)
hmac_sha_begin(HMAC_SHA1, &hmac->ctx);
else
hmac_sha_begin(HMAC_SHA256, &hmac->ctx);
hmac_sha_key(key, key_length, &hmac->ctx);
return MZ_OK;
}
int32_t mz_crypt_hmac_update(void *handle, const void *buf, int32_t size)
{
mz_crypt_hmac *hmac = (mz_crypt_hmac *)handle;
if (hmac == NULL || buf == NULL)
return MZ_PARAM_ERROR;
hmac_sha_data(buf, size, &hmac->ctx);
return MZ_OK;
}
int32_t mz_crypt_hmac_end(void *handle, uint8_t *digest, int32_t digest_size)
{
mz_crypt_hmac *hmac = (mz_crypt_hmac *)handle;
if (hmac == NULL || digest == NULL)
return MZ_PARAM_ERROR;
if (hmac->algorithm == MZ_HASH_SHA1)
{
if (digest_size < MZ_HASH_SHA1_SIZE)
return MZ_BUF_ERROR;
hmac_sha_end(digest, digest_size, &hmac->ctx);
}
else
{
if (digest_size < MZ_HASH_SHA256_SIZE)
return MZ_BUF_ERROR;
hmac_sha_end(digest, digest_size, &hmac->ctx);
}
return MZ_OK;
}
void mz_crypt_hmac_set_algorithm(void *handle, uint16_t algorithm)
{
mz_crypt_hmac *hmac = (mz_crypt_hmac *)handle;
hmac->algorithm = algorithm;
}
int32_t mz_crypt_hmac_copy(void *src_handle, void *target_handle)
{
mz_crypt_hmac *source = (mz_crypt_hmac *)src_handle;
mz_crypt_hmac *target = (mz_crypt_hmac *)target_handle;
if (target == NULL || source == NULL)
return MZ_PARAM_ERROR;
memcpy(&target->ctx, &source->ctx, sizeof(hmac_ctx));
return MZ_OK;
}
void *mz_crypt_hmac_create(void **handle)
{
mz_crypt_hmac *hmac = NULL;
hmac = (mz_crypt_hmac *)MZ_ALLOC(sizeof(mz_crypt_hmac));
if (hmac != NULL)
{
memset(hmac, 0, sizeof(mz_crypt_hmac));
hmac->algorithm = MZ_HASH_SHA256;
}
if (handle != NULL)
*handle = hmac;
return hmac;
}
void mz_crypt_hmac_delete(void **handle)
{
mz_crypt_hmac *hmac = NULL;
if (handle == NULL)
return;
hmac = (mz_crypt_hmac *)*handle;
if (hmac != NULL)
MZ_FREE(hmac);
*handle = NULL;
}
/***************************************************************************/
#if defined(MZ_ZIP_SIGNING)
int32_t mz_crypt_sign(uint8_t *message, int32_t message_size, uint8_t *cert_data, int32_t cert_data_size,
const char *cert_pwd, uint8_t **signature, int32_t *signature_size)
{
MZ_UNUSED(message);
MZ_UNUSED(message_size);
MZ_UNUSED(cert_data);
MZ_UNUSED(cert_data_size);
MZ_UNUSED(cert_pwd);
MZ_UNUSED(signature);
MZ_UNUSED(signature_size);
return MZ_SUPPORT_ERROR;
}
int32_t mz_crypt_sign_verify(uint8_t *message, int32_t message_size, uint8_t *signature, int32_t signature_size)
{
MZ_UNUSED(message);
MZ_UNUSED(message_size);
MZ_UNUSED(signature);
MZ_UNUSED(signature_size);
return MZ_SUPPORT_ERROR;
}
#endif
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