/*
+--------------------------------------------------------------------+
- | libmemcached - C/C++ Client Library for memcached |
+ | libmemcached-awesome - C/C++ Client Library for memcached |
+--------------------------------------------------------------------+
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted under the terms of the BSD license. |
#include "libhashkit/common.h"
-#include "libhashkit/rijndael.hpp"
-
#include <cstring>
-#define AES_KEY_LENGTH 256 /* 128, 192, 256 */
-#define AES_BLOCK_SIZE 16
+#ifdef HAVE_OPENSSL_CRYPTO
+
+#include <openssl/evp.h>
+
+#define DIGEST_ROUNDS 5
+
+#define AES_KEY_NBYTES 32
+#define AES_IV_NBYTES 32
+
+struct aes_key_t {
+ EVP_CIPHER_CTX *encryption_context;
+ EVP_CIPHER_CTX *decryption_context;
+};
+
+
+aes_key_t *aes_create_key(const char *key, const size_t key_length) {
+ unsigned char aes_key[AES_KEY_NBYTES];
+ unsigned char aes_iv[AES_IV_NBYTES];
+ const unsigned char *ukey = (const unsigned char *) key;
+
+ if (!key) {
+ return NULL;
+ }
+
+ int i = EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha256(), NULL, ukey, key_length, DIGEST_ROUNDS,
+ aes_key, aes_iv);
+ if (i != AES_KEY_NBYTES) {
+ return NULL;
+ }
+
+ aes_key_t *aes_ctx = (aes_key_t *) malloc(sizeof(aes_key_t));
+
+ if (!(aes_ctx->encryption_context = EVP_CIPHER_CTX_new())) {
+ return NULL;
+ }
+ if (!(aes_ctx->decryption_context = EVP_CIPHER_CTX_new())) {
+ EVP_CIPHER_CTX_free(aes_ctx->encryption_context);
+ return NULL;
+ }
+
+ EVP_CIPHER_CTX_init(aes_ctx->encryption_context);
+ EVP_CIPHER_CTX_init(aes_ctx->decryption_context);
+ if (EVP_EncryptInit_ex(aes_ctx->encryption_context, EVP_aes_256_cbc(), NULL, ukey, aes_iv) != 1
+ || EVP_DecryptInit_ex(aes_ctx->decryption_context, EVP_aes_256_cbc(), NULL, ukey, aes_iv) != 1)
+ {
+ aes_free_key(aes_ctx);
+ return NULL;
+ }
+
+ return aes_ctx;
+}
+
+hashkit_string_st *aes_encrypt(aes_key_t *ctx, const char *source, size_t source_length) {
+ EVP_CIPHER_CTX *encryption_context = ctx->encryption_context;
+ int cipher_length = source_length + EVP_CIPHER_CTX_block_size(encryption_context);
+ int final_length = 0;
+ const unsigned char *usource = (const unsigned char *) source;
+ unsigned char *cipher_text = (unsigned char *) malloc(cipher_length);
+ if (!cipher_text) {
+ return NULL;
+ }
+ if (EVP_EncryptInit_ex(encryption_context, NULL, NULL, NULL, NULL) != 1
+ || EVP_EncryptUpdate(encryption_context, cipher_text, &cipher_length, usource, source_length) != 1
+ || EVP_EncryptFinal_ex(encryption_context, cipher_text + cipher_length, &final_length) != 1)
+ {
+ free(cipher_text);
+ return NULL;
+ }
+
+ hashkit_string_st *destination = hashkit_string_create(cipher_length + final_length);
+ if (!destination) {
+ return NULL;
+ }
+ char *dest = hashkit_string_c_str_mutable(destination);
+ memcpy(dest, cipher_text, cipher_length + final_length);
+ hashkit_string_set_length(destination, cipher_length + final_length);
+ return destination;
+}
+
+hashkit_string_st *aes_decrypt(aes_key_t *ctx, const char *source, size_t source_length) {
+ EVP_CIPHER_CTX *decryption_context = ctx->decryption_context;
+ int plain_text_length = source_length;
+ int final_length = 0;
+ const unsigned char *usource = (const unsigned char *) source;
+ unsigned char *plain_text = (unsigned char *) malloc(plain_text_length);
+ if (!plain_text) {
+ return NULL;
+ }
+ if (EVP_DecryptInit_ex(decryption_context, NULL, NULL, NULL, NULL) != 1
+ || EVP_DecryptUpdate(decryption_context, plain_text, &plain_text_length, usource, source_length) != 1
+ || EVP_DecryptFinal_ex(decryption_context, plain_text + plain_text_length, &final_length) != 1)
+ {
+ free(plain_text);
+ return NULL;
+ }
+
+ hashkit_string_st *destination = hashkit_string_create(plain_text_length + final_length);
+ if (!destination) {
+ return NULL;
+ }
+ char *dest = hashkit_string_c_str_mutable(destination);
+ memcpy(dest, plain_text, plain_text_length + final_length);
+ hashkit_string_set_length(destination, plain_text_length + final_length);
+ return destination;
+}
+
+aes_key_t *aes_clone_key(aes_key_t *old_context) {
+ if (!old_context) {
+ return NULL;
+ }
+
+ aes_key_t *new_context = (aes_key_t *) malloc(sizeof(aes_key_t));
+ if (new_context) {
+ new_context->encryption_context = EVP_CIPHER_CTX_new();
+ new_context->decryption_context = EVP_CIPHER_CTX_new();
+ if (!new_context->encryption_context || !new_context->decryption_context) {
+ aes_free_key(new_context);
+ return NULL;
+ }
+ EVP_CIPHER_CTX_copy(new_context->encryption_context, old_context->encryption_context);
+ EVP_CIPHER_CTX_copy(new_context->decryption_context, old_context->decryption_context);
+ }
+
+ return new_context;
+}
+
+void aes_free_key(aes_key_t *context) {
+ if (context) {
+ if (context->encryption_context) {
+ EVP_CIPHER_CTX_free(context->encryption_context);
+ context->encryption_context = NULL;
+ }
+ if (context->decryption_context) {
+ EVP_CIPHER_CTX_free(context->decryption_context);
+ context->decryption_context = NULL;
+ }
+ free(context);
+ }
+}
+
+#else
+
+# include "libhashkit/rijndael.hpp"
+
+# define AES_KEY_LENGTH 256 /* 128, 192, 256 */
+# define AES_BLOCK_SIZE 16
enum encrypt_t { AES_ENCRYPT, AES_DECRYPT };
if (ptr == rkey_end) {
ptr = rkey; /* Just loop over tmp_key until we used all key */
}
- *ptr ^= (uint8_t)(*sptr);
+ *ptr ^= (uint8_t) (*sptr);
}
_aes_key->decode_key.nr = rijndaelKeySetupDec(_aes_key->decode_key.rk, rkey, AES_KEY_LENGTH);
}
aes_key_t *aes_clone_key(aes_key_t *_aes_key) {
- if (_aes_key == NULL) {
+ if (!_aes_key) {
return NULL;
}
}
hashkit_string_st *aes_encrypt(aes_key_t *_aes_key, const char *source, size_t source_length) {
- if (_aes_key == NULL) {
+ if (!_aes_key) {
return NULL;
}
}
hashkit_string_st *aes_decrypt(aes_key_t *_aes_key, const char *source, size_t source_length) {
- if (_aes_key == NULL) {
+ if (!_aes_key) {
return NULL;
}
return destination;
}
+
+void aes_free_key(aes_key_t *key) {
+ if (key) {
+ free(key);
+ }
+}
+
+#endif
projects / awesomized / libmemcached / blobdiff