/* Licensed to the Apache Software Foundation (ASF) under one or more | |
* contributor license agreements. See the NOTICE file distributed with | |
* this work for additional information regarding copyright ownership. | |
* The ASF licenses this file to You under the Apache License, Version 2.0 | |
* (the "License"); you may not use this file except in compliance with | |
* the License. You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
#include "apr_lib.h" | |
#include "apu.h" | |
#include "apr_private.h" | |
#include "apu_errno.h" | |
#include <ctype.h> | |
#include <assert.h> | |
#include <stdlib.h> | |
#include "apr_strings.h" | |
#include "apr_time.h" | |
#include "apr_buckets.h" | |
#include "apr_random.h" | |
#include "apr_crypto_internal.h" | |
#if APU_HAVE_CRYPTO | |
#include <CommonCrypto/CommonCrypto.h> | |
#define LOG_PREFIX "apr_crypto_commoncrypto: " | |
struct apr_crypto_t | |
{ | |
apr_pool_t *pool; | |
const apr_crypto_driver_t *provider; | |
apu_err_t *result; | |
apr_array_header_t *keys; | |
apr_hash_t *types; | |
apr_hash_t *modes; | |
apr_random_t *rng; | |
}; | |
struct apr_crypto_key_t | |
{ | |
apr_pool_t *pool; | |
const apr_crypto_driver_t *provider; | |
const apr_crypto_t *f; | |
CCAlgorithm algorithm; | |
CCOptions options; | |
unsigned char *key; | |
int keyLen; | |
int ivSize; | |
apr_size_t blockSize; | |
}; | |
struct apr_crypto_block_t | |
{ | |
apr_pool_t *pool; | |
const apr_crypto_driver_t *provider; | |
const apr_crypto_t *f; | |
const apr_crypto_key_t *key; | |
CCCryptorRef ref; | |
}; | |
static int key_3des_192 = APR_KEY_3DES_192; | |
static int key_aes_128 = APR_KEY_AES_128; | |
static int key_aes_192 = APR_KEY_AES_192; | |
static int key_aes_256 = APR_KEY_AES_256; | |
static int mode_ecb = APR_MODE_ECB; | |
static int mode_cbc = APR_MODE_CBC; | |
/** | |
* Fetch the most recent error from this driver. | |
*/ | |
static apr_status_t crypto_error(const apu_err_t **result, | |
const apr_crypto_t *f) | |
{ | |
*result = f->result; | |
return APR_SUCCESS; | |
} | |
/** | |
* Shutdown the crypto library and release resources. | |
*/ | |
static apr_status_t crypto_shutdown(void) | |
{ | |
return APR_SUCCESS; | |
} | |
static apr_status_t crypto_shutdown_helper(void *data) | |
{ | |
return crypto_shutdown(); | |
} | |
/** | |
* Initialise the crypto library and perform one time initialisation. | |
*/ | |
static apr_status_t crypto_init(apr_pool_t *pool, const char *params, | |
const apu_err_t **result) | |
{ | |
apr_pool_cleanup_register(pool, pool, crypto_shutdown_helper, | |
apr_pool_cleanup_null); | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Clean encryption / decryption context. | |
* @note After cleanup, a context is free to be reused if necessary. | |
* @param ctx The block context to use. | |
* @return Returns APR_ENOTIMPL if not supported. | |
*/ | |
static apr_status_t crypto_block_cleanup(apr_crypto_block_t *ctx) | |
{ | |
if (ctx->ref) { | |
CCCryptorRelease(ctx->ref); | |
ctx->ref = NULL; | |
} | |
return APR_SUCCESS; | |
} | |
static apr_status_t crypto_block_cleanup_helper(void *data) | |
{ | |
apr_crypto_block_t *block = (apr_crypto_block_t *) data; | |
return crypto_block_cleanup(block); | |
} | |
/** | |
* @brief Clean encryption / decryption context. | |
* @note After cleanup, a context is free to be reused if necessary. | |
* @param f The context to use. | |
* @return Returns APR_ENOTIMPL if not supported. | |
*/ | |
static apr_status_t crypto_cleanup(apr_crypto_t *f) | |
{ | |
return APR_SUCCESS; | |
} | |
static apr_status_t crypto_cleanup_helper(void *data) | |
{ | |
apr_crypto_t *f = (apr_crypto_t *) data; | |
return crypto_cleanup(f); | |
} | |
/** | |
* @brief Create a context for supporting encryption. Keys, certificates, | |
* algorithms and other parameters will be set per context. More than | |
* one context can be created at one time. A cleanup will be automatically | |
* registered with the given pool to guarantee a graceful shutdown. | |
* @param f - context pointer will be written here | |
* @param provider - provider to use | |
* @param params - array of key parameters | |
* @param pool - process pool | |
* @return APR_ENOENGINE when the engine specified does not exist. APR_EINITENGINE | |
* if the engine cannot be initialised. | |
*/ | |
static apr_status_t crypto_make(apr_crypto_t **ff, | |
const apr_crypto_driver_t *provider, const char *params, | |
apr_pool_t *pool) | |
{ | |
apr_crypto_t *f = apr_pcalloc(pool, sizeof(apr_crypto_t)); | |
apr_status_t rv; | |
if (!f) { | |
return APR_ENOMEM; | |
} | |
*ff = f; | |
f->pool = pool; | |
f->provider = provider; | |
/* seed the secure random number generator */ | |
f->rng = apr_random_standard_new(pool); | |
if (!f->rng) { | |
return APR_ENOMEM; | |
} | |
do { | |
unsigned char seed[8]; | |
rv = apr_generate_random_bytes(seed, sizeof(seed)); | |
if (rv != APR_SUCCESS) { | |
return rv; | |
} | |
apr_random_add_entropy(f->rng, seed, sizeof(seed)); | |
rv = apr_random_secure_ready(f->rng); | |
} while (rv == APR_ENOTENOUGHENTROPY); | |
f->result = apr_pcalloc(pool, sizeof(apu_err_t)); | |
if (!f->result) { | |
return APR_ENOMEM; | |
} | |
f->keys = apr_array_make(pool, 10, sizeof(apr_crypto_key_t)); | |
if (!f->keys) { | |
return APR_ENOMEM; | |
} | |
f->types = apr_hash_make(pool); | |
if (!f->types) { | |
return APR_ENOMEM; | |
} | |
apr_hash_set(f->types, "3des192", APR_HASH_KEY_STRING, &(key_3des_192)); | |
apr_hash_set(f->types, "aes128", APR_HASH_KEY_STRING, &(key_aes_128)); | |
apr_hash_set(f->types, "aes192", APR_HASH_KEY_STRING, &(key_aes_192)); | |
apr_hash_set(f->types, "aes256", APR_HASH_KEY_STRING, &(key_aes_256)); | |
f->modes = apr_hash_make(pool); | |
if (!f->modes) { | |
return APR_ENOMEM; | |
} | |
apr_hash_set(f->modes, "ecb", APR_HASH_KEY_STRING, &(mode_ecb)); | |
apr_hash_set(f->modes, "cbc", APR_HASH_KEY_STRING, &(mode_cbc)); | |
apr_pool_cleanup_register(pool, f, crypto_cleanup_helper, | |
apr_pool_cleanup_null); | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Get a hash table of key types, keyed by the name of the type against | |
* an integer pointer constant. | |
* | |
* @param types - hashtable of key types keyed to constants. | |
* @param f - encryption context | |
* @return APR_SUCCESS for success | |
*/ | |
static apr_status_t crypto_get_block_key_types(apr_hash_t **types, | |
const apr_crypto_t *f) | |
{ | |
*types = f->types; | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Get a hash table of key modes, keyed by the name of the mode against | |
* an integer pointer constant. | |
* | |
* @param modes - hashtable of key modes keyed to constants. | |
* @param f - encryption context | |
* @return APR_SUCCESS for success | |
*/ | |
static apr_status_t crypto_get_block_key_modes(apr_hash_t **modes, | |
const apr_crypto_t *f) | |
{ | |
*modes = f->modes; | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Create a key from the given passphrase. By default, the PBKDF2 | |
* algorithm is used to generate the key from the passphrase. It is expected | |
* that the same pass phrase will generate the same key, regardless of the | |
* backend crypto platform used. The key is cleaned up when the context | |
* is cleaned, and may be reused with multiple encryption or decryption | |
* operations. | |
* @note If *key is NULL, a apr_crypto_key_t will be created from a pool. If | |
* *key is not NULL, *key must point at a previously created structure. | |
* @param key The key returned, see note. | |
* @param ivSize The size of the initialisation vector will be returned, based | |
* on whether an IV is relevant for this type of crypto. | |
* @param pass The passphrase to use. | |
* @param passLen The passphrase length in bytes | |
* @param salt The salt to use. | |
* @param saltLen The salt length in bytes | |
* @param type 3DES_192, AES_128, AES_192, AES_256. | |
* @param mode Electronic Code Book / Cipher Block Chaining. | |
* @param doPad Pad if necessary. | |
* @param iterations Iteration count | |
* @param f The context to use. | |
* @param p The pool to use. | |
* @return Returns APR_ENOKEY if the pass phrase is missing or empty, or if a backend | |
* error occurred while generating the key. APR_ENOCIPHER if the type or mode | |
* is not supported by the particular backend. APR_EKEYTYPE if the key type is | |
* not known. APR_EPADDING if padding was requested but is not supported. | |
* APR_ENOTIMPL if not implemented. | |
*/ | |
static apr_status_t crypto_passphrase(apr_crypto_key_t **k, apr_size_t *ivSize, | |
const char *pass, apr_size_t passLen, const unsigned char * salt, | |
apr_size_t saltLen, const apr_crypto_block_key_type_e type, | |
const apr_crypto_block_key_mode_e mode, const int doPad, | |
const int iterations, const apr_crypto_t *f, apr_pool_t *p) | |
{ | |
apr_crypto_key_t *key = *k; | |
if (!key) { | |
*k = key = apr_array_push(f->keys); | |
} | |
if (!key) { | |
return APR_ENOMEM; | |
} | |
key->f = f; | |
key->provider = f->provider; | |
/* handle padding */ | |
key->options = doPad ? kCCOptionPKCS7Padding : 0; | |
/* determine the algorithm to be used */ | |
switch (type) { | |
case (APR_KEY_3DES_192): | |
/* A 3DES key */ | |
if (mode == APR_MODE_CBC) { | |
key->algorithm = kCCAlgorithm3DES; | |
key->keyLen = kCCKeySize3DES; | |
key->ivSize = kCCBlockSize3DES; | |
key->blockSize = kCCBlockSize3DES; | |
} | |
else { | |
key->algorithm = kCCAlgorithm3DES; | |
key->options += kCCOptionECBMode; | |
key->keyLen = kCCKeySize3DES; | |
key->ivSize = 0; | |
key->blockSize = kCCBlockSize3DES; | |
} | |
break; | |
case (APR_KEY_AES_128): | |
if (mode == APR_MODE_CBC) { | |
key->algorithm = kCCAlgorithmAES128; | |
key->keyLen = kCCKeySizeAES128; | |
key->ivSize = kCCBlockSizeAES128; | |
key->blockSize = kCCBlockSizeAES128; | |
} | |
else { | |
key->algorithm = kCCAlgorithmAES128; | |
key->options += kCCOptionECBMode; | |
key->keyLen = kCCKeySizeAES128; | |
key->ivSize = 0; | |
key->blockSize = kCCBlockSizeAES128; | |
} | |
break; | |
case (APR_KEY_AES_192): | |
if (mode == APR_MODE_CBC) { | |
key->algorithm = kCCAlgorithmAES128; | |
key->keyLen = kCCKeySizeAES192; | |
key->ivSize = kCCBlockSizeAES128; | |
key->blockSize = kCCBlockSizeAES128; | |
} | |
else { | |
key->algorithm = kCCAlgorithmAES128; | |
key->options += kCCOptionECBMode; | |
key->keyLen = kCCKeySizeAES192; | |
key->ivSize = 0; | |
key->blockSize = kCCBlockSizeAES128; | |
} | |
break; | |
case (APR_KEY_AES_256): | |
if (mode == APR_MODE_CBC) { | |
key->algorithm = kCCAlgorithmAES128; | |
key->keyLen = kCCKeySizeAES256; | |
key->ivSize = kCCBlockSizeAES128; | |
key->blockSize = kCCBlockSizeAES128; | |
} | |
else { | |
key->algorithm = kCCAlgorithmAES128; | |
key->options += kCCOptionECBMode; | |
key->keyLen = kCCKeySizeAES256; | |
key->ivSize = 0; | |
key->blockSize = kCCBlockSizeAES128; | |
} | |
break; | |
default: | |
/* TODO: Support CAST, Blowfish */ | |
/* unknown key type, give up */ | |
return APR_EKEYTYPE; | |
} | |
/* make space for the key */ | |
key->key = apr_pcalloc(p, key->keyLen); | |
if (!key->key) { | |
return APR_ENOMEM; | |
} | |
apr_crypto_clear(p, key->key, key->keyLen); | |
/* generate the key */ | |
if ((f->result->rc = CCKeyDerivationPBKDF(kCCPBKDF2, pass, passLen, salt, | |
saltLen, kCCPRFHmacAlgSHA1, iterations, key->key, key->keyLen)) | |
== kCCParamError) { | |
return APR_ENOKEY; | |
} | |
if (ivSize) { | |
*ivSize = key->ivSize; | |
} | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Initialise a context for encrypting arbitrary data using the given key. | |
* @note If *ctx is NULL, a apr_crypto_block_t will be created from a pool. If | |
* *ctx is not NULL, *ctx must point at a previously created structure. | |
* @param ctx The block context returned, see note. | |
* @param iv Optional initialisation vector. If the buffer pointed to is NULL, | |
* an IV will be created at random, in space allocated from the pool. | |
* If the buffer pointed to is not NULL, the IV in the buffer will be | |
* used. | |
* @param key The key structure. | |
* @param blockSize The block size of the cipher. | |
* @param p The pool to use. | |
* @return Returns APR_ENOIV if an initialisation vector is required but not specified. | |
* Returns APR_EINIT if the backend failed to initialise the context. Returns | |
* APR_ENOTIMPL if not implemented. | |
*/ | |
static apr_status_t crypto_block_encrypt_init(apr_crypto_block_t **ctx, | |
const unsigned char **iv, const apr_crypto_key_t *key, | |
apr_size_t *blockSize, apr_pool_t *p) | |
{ | |
unsigned char *usedIv; | |
apr_crypto_block_t *block = *ctx; | |
if (!block) { | |
*ctx = block = apr_pcalloc(p, sizeof(apr_crypto_block_t)); | |
} | |
if (!block) { | |
return APR_ENOMEM; | |
} | |
block->f = key->f; | |
block->pool = p; | |
block->provider = key->provider; | |
block->key = key; | |
apr_pool_cleanup_register(p, block, crypto_block_cleanup_helper, | |
apr_pool_cleanup_null); | |
/* generate an IV, if necessary */ | |
usedIv = NULL; | |
if (key->ivSize) { | |
if (iv == NULL) { | |
return APR_ENOIV; | |
} | |
if (*iv == NULL) { | |
apr_status_t status; | |
usedIv = apr_pcalloc(p, key->ivSize); | |
if (!usedIv) { | |
return APR_ENOMEM; | |
} | |
apr_crypto_clear(p, usedIv, key->ivSize); | |
status = apr_random_secure_bytes(block->f->rng, usedIv, | |
key->ivSize); | |
if (APR_SUCCESS != status) { | |
return status; | |
} | |
*iv = usedIv; | |
} | |
else { | |
usedIv = (unsigned char *) *iv; | |
} | |
} | |
/* create a new context for encryption */ | |
switch ((block->f->result->rc = CCCryptorCreate(kCCEncrypt, key->algorithm, | |
key->options, key->key, key->keyLen, usedIv, &block->ref))) { | |
case kCCSuccess: { | |
break; | |
} | |
case kCCParamError: { | |
return APR_EINIT; | |
} | |
case kCCMemoryFailure: { | |
return APR_ENOMEM; | |
} | |
case kCCAlignmentError: { | |
return APR_EPADDING; | |
} | |
case kCCUnimplemented: { | |
return APR_ENOTIMPL; | |
} | |
default: { | |
return APR_EINIT; | |
} | |
} | |
if (blockSize) { | |
*blockSize = key->blockSize; | |
} | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Encrypt data provided by in, write it to out. | |
* @note The number of bytes written will be written to outlen. If | |
* out is NULL, outlen will contain the maximum size of the | |
* buffer needed to hold the data, including any data | |
* generated by apr_crypto_block_encrypt_finish below. If *out points | |
* to NULL, a buffer sufficiently large will be created from | |
* the pool provided. If *out points to a not-NULL value, this | |
* value will be used as a buffer instead. | |
* @param out Address of a buffer to which data will be written, | |
* see note. | |
* @param outlen Length of the output will be written here. | |
* @param in Address of the buffer to read. | |
* @param inlen Length of the buffer to read. | |
* @param ctx The block context to use. | |
* @return APR_ECRYPT if an error occurred. Returns APR_ENOTIMPL if | |
* not implemented. | |
*/ | |
static apr_status_t crypto_block_encrypt(unsigned char **out, | |
apr_size_t *outlen, const unsigned char *in, apr_size_t inlen, | |
apr_crypto_block_t *ctx) | |
{ | |
apr_size_t outl = *outlen; | |
unsigned char *buffer; | |
/* are we after the maximum size of the out buffer? */ | |
if (!out) { | |
*outlen = CCCryptorGetOutputLength(ctx->ref, inlen, 1); | |
return APR_SUCCESS; | |
} | |
/* must we allocate the output buffer from a pool? */ | |
if (!*out) { | |
outl = CCCryptorGetOutputLength(ctx->ref, inlen, 1); | |
buffer = apr_palloc(ctx->pool, outl); | |
if (!buffer) { | |
return APR_ENOMEM; | |
} | |
apr_crypto_clear(ctx->pool, buffer, outl); | |
*out = buffer; | |
} | |
switch ((ctx->f->result->rc = CCCryptorUpdate(ctx->ref, in, inlen, (*out), | |
outl, &outl))) { | |
case kCCSuccess: { | |
break; | |
} | |
case kCCBufferTooSmall: { | |
return APR_ENOSPACE; | |
} | |
default: { | |
return APR_ECRYPT; | |
} | |
} | |
*outlen = outl; | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Encrypt final data block, write it to out. | |
* @note If necessary the final block will be written out after being | |
* padded. Typically the final block will be written to the | |
* same buffer used by apr_crypto_block_encrypt, offset by the | |
* number of bytes returned as actually written by the | |
* apr_crypto_block_encrypt() call. After this call, the context | |
* is cleaned and can be reused by apr_crypto_block_encrypt_init(). | |
* @param out Address of a buffer to which data will be written. This | |
* buffer must already exist, and is usually the same | |
* buffer used by apr_evp_crypt(). See note. | |
* @param outlen Length of the output will be written here. | |
* @param ctx The block context to use. | |
* @return APR_ECRYPT if an error occurred. | |
* @return APR_EPADDING if padding was enabled and the block was incorrectly | |
* formatted. | |
* @return APR_ENOTIMPL if not implemented. | |
*/ | |
static apr_status_t crypto_block_encrypt_finish(unsigned char *out, | |
apr_size_t *outlen, apr_crypto_block_t *ctx) | |
{ | |
apr_size_t len = *outlen; | |
ctx->f->result->rc = CCCryptorFinal(ctx->ref, out, | |
CCCryptorGetOutputLength(ctx->ref, 0, 1), &len); | |
/* always clean up */ | |
crypto_block_cleanup(ctx); | |
switch (ctx->f->result->rc) { | |
case kCCSuccess: { | |
break; | |
} | |
case kCCBufferTooSmall: { | |
return APR_ENOSPACE; | |
} | |
case kCCAlignmentError: { | |
return APR_EPADDING; | |
} | |
case kCCDecodeError: { | |
return APR_ECRYPT; | |
} | |
default: { | |
return APR_ECRYPT; | |
} | |
} | |
*outlen = len; | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Initialise a context for decrypting arbitrary data using the given key. | |
* @note If *ctx is NULL, a apr_crypto_block_t will be created from a pool. If | |
* *ctx is not NULL, *ctx must point at a previously created structure. | |
* @param ctx The block context returned, see note. | |
* @param blockSize The block size of the cipher. | |
* @param iv Optional initialisation vector. If the buffer pointed to is NULL, | |
* an IV will be created at random, in space allocated from the pool. | |
* If the buffer is not NULL, the IV in the buffer will be used. | |
* @param key The key structure. | |
* @param p The pool to use. | |
* @return Returns APR_ENOIV if an initialisation vector is required but not specified. | |
* Returns APR_EINIT if the backend failed to initialise the context. Returns | |
* APR_ENOTIMPL if not implemented. | |
*/ | |
static apr_status_t crypto_block_decrypt_init(apr_crypto_block_t **ctx, | |
apr_size_t *blockSize, const unsigned char *iv, | |
const apr_crypto_key_t *key, apr_pool_t *p) | |
{ | |
apr_crypto_block_t *block = *ctx; | |
if (!block) { | |
*ctx = block = apr_pcalloc(p, sizeof(apr_crypto_block_t)); | |
} | |
if (!block) { | |
return APR_ENOMEM; | |
} | |
block->f = key->f; | |
block->pool = p; | |
block->provider = key->provider; | |
apr_pool_cleanup_register(p, block, crypto_block_cleanup_helper, | |
apr_pool_cleanup_null); | |
/* generate an IV, if necessary */ | |
if (key->ivSize) { | |
if (iv == NULL) { | |
return APR_ENOIV; | |
} | |
} | |
/* create a new context for decryption */ | |
switch ((block->f->result->rc = CCCryptorCreate(kCCDecrypt, key->algorithm, | |
key->options, key->key, key->keyLen, iv, &block->ref))) { | |
case kCCSuccess: { | |
break; | |
} | |
case kCCParamError: { | |
return APR_EINIT; | |
} | |
case kCCMemoryFailure: { | |
return APR_ENOMEM; | |
} | |
case kCCAlignmentError: { | |
return APR_EPADDING; | |
} | |
case kCCUnimplemented: { | |
return APR_ENOTIMPL; | |
} | |
default: { | |
return APR_EINIT; | |
} | |
} | |
if (blockSize) { | |
*blockSize = key->blockSize; | |
} | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Decrypt data provided by in, write it to out. | |
* @note The number of bytes written will be written to outlen. If | |
* out is NULL, outlen will contain the maximum size of the | |
* buffer needed to hold the data, including any data | |
* generated by apr_crypto_block_decrypt_finish below. If *out points | |
* to NULL, a buffer sufficiently large will be created from | |
* the pool provided. If *out points to a not-NULL value, this | |
* value will be used as a buffer instead. | |
* @param out Address of a buffer to which data will be written, | |
* see note. | |
* @param outlen Length of the output will be written here. | |
* @param in Address of the buffer to read. | |
* @param inlen Length of the buffer to read. | |
* @param ctx The block context to use. | |
* @return APR_ECRYPT if an error occurred. Returns APR_ENOTIMPL if | |
* not implemented. | |
*/ | |
static apr_status_t crypto_block_decrypt(unsigned char **out, | |
apr_size_t *outlen, const unsigned char *in, apr_size_t inlen, | |
apr_crypto_block_t *ctx) | |
{ | |
apr_size_t outl = *outlen; | |
unsigned char *buffer; | |
/* are we after the maximum size of the out buffer? */ | |
if (!out) { | |
*outlen = CCCryptorGetOutputLength(ctx->ref, inlen, 1); | |
return APR_SUCCESS; | |
} | |
/* must we allocate the output buffer from a pool? */ | |
if (!*out) { | |
outl = CCCryptorGetOutputLength(ctx->ref, inlen, 1); | |
buffer = apr_palloc(ctx->pool, outl); | |
if (!buffer) { | |
return APR_ENOMEM; | |
} | |
apr_crypto_clear(ctx->pool, buffer, outl); | |
*out = buffer; | |
} | |
switch ((ctx->f->result->rc = CCCryptorUpdate(ctx->ref, in, inlen, (*out), | |
outl, &outl))) { | |
case kCCSuccess: { | |
break; | |
} | |
case kCCBufferTooSmall: { | |
return APR_ENOSPACE; | |
} | |
default: { | |
return APR_ECRYPT; | |
} | |
} | |
*outlen = outl; | |
return APR_SUCCESS; | |
} | |
/** | |
* @brief Decrypt final data block, write it to out. | |
* @note If necessary the final block will be written out after being | |
* padded. Typically the final block will be written to the | |
* same buffer used by apr_crypto_block_decrypt, offset by the | |
* number of bytes returned as actually written by the | |
* apr_crypto_block_decrypt() call. After this call, the context | |
* is cleaned and can be reused by apr_crypto_block_decrypt_init(). | |
* @param out Address of a buffer to which data will be written. This | |
* buffer must already exist, and is usually the same | |
* buffer used by apr_evp_crypt(). See note. | |
* @param outlen Length of the output will be written here. | |
* @param ctx The block context to use. | |
* @return APR_ECRYPT if an error occurred. | |
* @return APR_EPADDING if padding was enabled and the block was incorrectly | |
* formatted. | |
* @return APR_ENOTIMPL if not implemented. | |
*/ | |
static apr_status_t crypto_block_decrypt_finish(unsigned char *out, | |
apr_size_t *outlen, apr_crypto_block_t *ctx) | |
{ | |
apr_size_t len = *outlen; | |
ctx->f->result->rc = CCCryptorFinal(ctx->ref, out, | |
CCCryptorGetOutputLength(ctx->ref, 0, 1), &len); | |
/* always clean up */ | |
crypto_block_cleanup(ctx); | |
switch (ctx->f->result->rc) { | |
case kCCSuccess: { | |
break; | |
} | |
case kCCBufferTooSmall: { | |
return APR_ENOSPACE; | |
} | |
case kCCAlignmentError: { | |
return APR_EPADDING; | |
} | |
case kCCDecodeError: { | |
return APR_ECRYPT; | |
} | |
default: { | |
return APR_ECRYPT; | |
} | |
} | |
*outlen = len; | |
return APR_SUCCESS; | |
} | |
/** | |
* OSX Common Crypto module. | |
*/ | |
APR_MODULE_DECLARE_DATA const apr_crypto_driver_t apr_crypto_commoncrypto_driver = | |
{ | |
"commoncrypto", crypto_init, crypto_make, crypto_get_block_key_types, | |
crypto_get_block_key_modes, crypto_passphrase, | |
crypto_block_encrypt_init, crypto_block_encrypt, | |
crypto_block_encrypt_finish, crypto_block_decrypt_init, | |
crypto_block_decrypt, crypto_block_decrypt_finish, crypto_block_cleanup, | |
crypto_cleanup, crypto_shutdown, crypto_error | |
}; | |
#endif |