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/* mz_crypt_apple.c -- Crypto/hash functions for Apple
Version 2.9.2, February 12, 2020
part of the MiniZip project
Copyright (C) 2010-2020 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 <CoreFoundation/CoreFoundation.h>
#include <CommonCrypto/CommonCryptor.h>
#include <CommonCrypto/CommonDigest.h>
#include <CommonCrypto/CommonHMAC.h>
#include <Security/Security.h>
#include <Security/SecPolicy.h>
/***************************************************************************/
int32_t mz_crypt_rand(uint8_t *buf, int32_t size)
{
if (SecRandomCopyBytes(kSecRandomDefault, size, buf) != errSecSuccess)
return 0;
return size;
}
/***************************************************************************/
typedef struct mz_crypt_sha_s {
CC_SHA1_CTX ctx1;
CC_SHA256_CTX ctx256;
int32_t error;
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->error = 0;
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;
mz_crypt_sha_reset(handle);
if (sha->algorithm == MZ_HASH_SHA1)
sha->error = CC_SHA1_Init(&sha->ctx1);
else if (sha->algorithm == MZ_HASH_SHA256)
sha->error = CC_SHA256_Init(&sha->ctx256);
else
return MZ_PARAM_ERROR;
if (!sha->error)
return MZ_HASH_ERROR;
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)
sha->error = CC_SHA1_Update(&sha->ctx1, buf, size);
else
sha->error = CC_SHA256_Update(&sha->ctx256, buf, size);
if (!sha->error)
return MZ_HASH_ERROR;
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;
sha->error = CC_SHA1_Final(digest, &sha->ctx1);
}
else
{
if (digest_size < MZ_HASH_SHA256_SIZE)
return MZ_BUF_ERROR;
sha->error = CC_SHA256_Final(digest, &sha->ctx256);
}
if (!sha->error)
return MZ_HASH_ERROR;
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 {
CCCryptorRef crypt;
int32_t mode;
int32_t error;
} mz_crypt_aes;
/***************************************************************************/
void mz_crypt_aes_reset(void *handle)
{
mz_crypt_aes *aes = (mz_crypt_aes *)handle;
if (aes->crypt != NULL)
CCCryptorRelease(aes->crypt);
aes->crypt = NULL;
}
int32_t mz_crypt_aes_encrypt(void *handle, uint8_t *buf, int32_t size)
{
mz_crypt_aes *aes = (mz_crypt_aes *)handle;
size_t data_moved = 0;
if (aes == NULL || buf == NULL)
return MZ_PARAM_ERROR;
if (size != MZ_AES_BLOCK_SIZE)
return MZ_PARAM_ERROR;
aes->error = CCCryptorUpdate(aes->crypt, buf, size, buf, size, &data_moved);
if (aes->error != kCCSuccess)
return MZ_HASH_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;
size_t data_moved = 0;
if (aes == NULL || buf == NULL)
return MZ_PARAM_ERROR;
if (size != MZ_AES_BLOCK_SIZE)
return MZ_PARAM_ERROR;
aes->error = CCCryptorUpdate(aes->crypt, buf, size, buf, size, &data_moved);
if (aes->error != kCCSuccess)
return MZ_HASH_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 || key_length == 0)
return MZ_PARAM_ERROR;
mz_crypt_aes_reset(handle);
aes->error = CCCryptorCreate(kCCEncrypt, kCCAlgorithmAES, kCCOptionECBMode,
key, key_length, NULL, &aes->crypt);
if (aes->error != kCCSuccess)
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 || key_length == 0)
return MZ_PARAM_ERROR;
mz_crypt_aes_reset(handle);
aes->error = CCCryptorCreate(kCCDecrypt, kCCAlgorithmAES, kCCOptionECBMode,
key, key_length, NULL, &aes->crypt);
if (aes->error != kCCSuccess)
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_crypt_aes_reset(*handle);
MZ_FREE(aes);
}
*handle = NULL;
}
/***************************************************************************/
typedef struct mz_crypt_hmac_s {
CCHmacContext ctx;
int32_t initialized;
int32_t error;
uint16_t algorithm;
} mz_crypt_hmac;
/***************************************************************************/
static void mz_crypt_hmac_free(void *handle)
{
mz_crypt_hmac *hmac = (mz_crypt_hmac *)handle;
memset(&hmac->ctx, 0, sizeof(hmac->ctx));
}
void mz_crypt_hmac_reset(void *handle)
{
mz_crypt_hmac *hmac = (mz_crypt_hmac *)handle;
mz_crypt_hmac_free(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;
CCHmacAlgorithm algorithm = 0;
if (hmac == NULL || key == NULL)
return MZ_PARAM_ERROR;
mz_crypt_hmac_reset(handle);
if (hmac->algorithm == MZ_HASH_SHA1)
algorithm = kCCHmacAlgSHA1;
else if (hmac->algorithm == MZ_HASH_SHA256)
algorithm = kCCHmacAlgSHA256;
else
return MZ_PARAM_ERROR;
CCHmacInit(&hmac->ctx, algorithm, key, key_length);
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;
CCHmacUpdate(&hmac->ctx, buf, size);
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;
CCHmacFinal(&hmac->ctx, digest);
}
else
{
if (digest_size < MZ_HASH_SHA256_SIZE)
return MZ_BUF_ERROR;
CCHmacFinal(&hmac->ctx, digest);
}
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 (source == NULL || target == NULL)
return MZ_PARAM_ERROR;
memcpy(&target->ctx, &source->ctx, sizeof(CCHmacContext));
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_crypt_hmac_free(*handle);
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)
{
CFStringRef password_ref = NULL;
CFDictionaryRef options_dict = NULL;
CFDictionaryRef identity_trust = NULL;
CFDataRef signature_out = NULL;
CFDataRef pkcs12_data = NULL;
CFArrayRef items = 0;
SecIdentityRef identity = NULL;
SecTrustRef trust = NULL;
OSStatus status = noErr;
const void *options_key[2] = { kSecImportExportPassphrase, kSecReturnRef };
const void *options_values[2] = { 0, kCFBooleanTrue };
int32_t err = MZ_SIGN_ERROR;
if (message == NULL || cert_data == NULL || signature == NULL || signature_size == NULL)
return MZ_PARAM_ERROR;
*signature = NULL;
*signature_size = 0;
password_ref = CFStringCreateWithCString(0, cert_pwd, kCFStringEncodingUTF8);
options_values[0] = password_ref;
options_dict = CFDictionaryCreate(0, options_key, options_values, 2, 0, 0);
if (options_dict)
pkcs12_data = CFDataCreate(0, cert_data, cert_data_size);
if (pkcs12_data)
status = SecPKCS12Import(pkcs12_data, options_dict, &items);
if (status == noErr)
identity_trust = CFArrayGetValueAtIndex(items, 0);
if (identity_trust)
identity = (SecIdentityRef)CFDictionaryGetValue(identity_trust, kSecImportItemIdentity);
if (identity)
trust = (SecTrustRef)CFDictionaryGetValue(identity_trust, kSecImportItemTrust);
if (trust)
{
status = CMSEncodeContent(identity, NULL, NULL, FALSE, 0, message, message_size, &signature_out);
if (status == errSecSuccess)
{
*signature_size = CFDataGetLength(signature_out);
*signature = (uint8_t *)MZ_ALLOC(*signature_size);
memcpy(*signature, CFDataGetBytePtr(signature_out), *signature_size);
err = MZ_OK;
}
}
if (signature_out)
CFRelease(signature_out);
if (items)
CFRelease(items);
if (pkcs12_data)
CFRelease(pkcs12_data);
if (options_dict)
CFRelease(options_dict);
if (password_ref)
CFRelease(password_ref);
return err;
}
int32_t mz_crypt_sign_verify(uint8_t *message, int32_t message_size, uint8_t *signature, int32_t signature_size)
{
CMSDecoderRef decoder = NULL;
CMSSignerStatus signer_status = 0;
CFDataRef message_out = NULL;
SecPolicyRef trust_policy = NULL;
OSStatus status = noErr;
OSStatus verify_status = noErr;
size_t signer_count = 0;
size_t i = 0;
int32_t err = MZ_SIGN_ERROR;
if (message == NULL || signature == NULL)
return MZ_PARAM_ERROR;
status = CMSDecoderCreate(&decoder);
if (status == errSecSuccess)
status = CMSDecoderUpdateMessage(decoder, signature, signature_size);
if (status == errSecSuccess)
status = CMSDecoderFinalizeMessage(decoder);
if (status == errSecSuccess)
trust_policy = SecPolicyCreateBasicX509();
if (status == errSecSuccess && trust_policy)
{
CMSDecoderGetNumSigners(decoder, &signer_count);
if (signer_count > 0)
err = MZ_OK;
for (i = 0; i < signer_count; i += 1)
{
status = CMSDecoderCopySignerStatus(decoder, i, trust_policy, TRUE, &signer_status, NULL, &verify_status);
if (status != errSecSuccess || verify_status != 0 || signer_status != kCMSSignerValid)
{
err = MZ_SIGN_ERROR;
break;
}
}
}
if (err == MZ_OK)
{
status = CMSDecoderCopyContent(decoder, &message_out);
if ((status != errSecSuccess) ||
(CFDataGetLength(message_out) != message_size) ||
(memcmp(message, CFDataGetBytePtr(message_out), message_size) != 0))
err = MZ_SIGN_ERROR;
}
if (trust_policy)
CFRelease(trust_policy);
if (decoder)
CFRelease(decoder);
return err;
}
#endif