AES encryption/decryption dialplan functions. More...
#include "asterisk.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/app.h"
#include "asterisk/aes.h"
Go to the source code of this file.
Defines | |
#define | AES_BLOCK_SIZE 16 |
Functions | |
static void | __reg_module (void) |
static void | __unreg_module (void) |
static int | aes_helper (struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len) |
static int | load_module (void) |
static int | unload_module (void) |
Variables | |
static struct ast_module_info __MODULE_INFO_SECTION | __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "AES dialplan functions" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, } |
static struct ast_custom_function | aes_decrypt_function |
static struct ast_custom_function | aes_encrypt_function |
static struct ast_module_info * | ast_module_info = &__mod_info |
AES encryption/decryption dialplan functions.
Definition in file func_aes.c.
#define AES_BLOCK_SIZE 16 |
Definition at line 35 of file func_aes.c.
Referenced by aes_helper().
static void __reg_module | ( | void | ) | [static] |
Definition at line 173 of file func_aes.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 173 of file func_aes.c.
static int aes_helper | ( | struct ast_channel * | chan, |
const char * | cmd, | ||
char * | data, | ||
char * | buf, | ||
size_t | len | ||
) | [static] |
Definition at line 83 of file func_aes.c.
References AES_BLOCK_SIZE, ast_aes_decrypt, ast_aes_encrypt, AST_APP_ARG, ast_base64decode(), ast_base64encode(), ast_calloc, ast_copy_string(), AST_DECLARE_APP_ARGS, ast_free, ast_log(), AST_STANDARD_APP_ARGS, ast_strlen_zero(), and LOG_WARNING.
{ unsigned char curblock[AES_BLOCK_SIZE] = { 0, }; char *tmp; char *tmpP; int data_len, encrypt; ast_aes_encrypt_key ecx; /* AES 128 Encryption context */ ast_aes_decrypt_key dcx; AST_DECLARE_APP_ARGS(args, AST_APP_ARG(key); AST_APP_ARG(data); ); AST_STANDARD_APP_ARGS(args, data); if (ast_strlen_zero(args.data) || ast_strlen_zero(args.key)) { ast_log(LOG_WARNING, "Syntax: %s(<key>,<data>) - missing argument!\n", cmd); return -1; } if (strlen(args.key) != AES_BLOCK_SIZE) { /* key must be of 16 characters in length, 128 bits */ ast_log(LOG_WARNING, "Syntax: %s(<key>,<data>) - <key> parameter must be exactly 16 characters!\n", cmd); return -1; } ast_aes_encrypt_key((unsigned char *) args.key, &ecx); /* encryption: plaintext -> encryptedtext -> base64 */ ast_aes_decrypt_key((unsigned char *) args.key, &dcx); /* decryption: base64 -> encryptedtext -> plaintext */ tmp = ast_calloc(1, len); /* requires a tmp buffer for the base64 decode */ tmpP = tmp; encrypt = strcmp("AES_DECRYPT", cmd); /* -1 if encrypting, 0 if decrypting */ if (encrypt) { /* if decrypting first decode src to base64 */ ast_copy_string(tmp, args.data, len); data_len = strlen(tmp); } else { data_len = ast_base64decode((unsigned char *) tmp, args.data, len); } if (data_len >= len) { /* make sure to not go over buffer len */ ast_log(LOG_WARNING, "Syntax: %s(<keys>,<data>) - <data> exceeds buffer length. Result may be truncated!\n", cmd); data_len = len - 1; } while (data_len > 0) { memset(curblock, 0, AES_BLOCK_SIZE); memcpy(curblock, tmpP, (data_len < AES_BLOCK_SIZE) ? data_len : AES_BLOCK_SIZE); if (encrypt) { ast_aes_encrypt(curblock, (unsigned char *) tmpP, &ecx); } else { ast_aes_decrypt(curblock, (unsigned char *) tmpP, &dcx); } tmpP += AES_BLOCK_SIZE; data_len -= AES_BLOCK_SIZE; } if (encrypt) { /* if encrypting encode result to base64 */ ast_base64encode(buf, (unsigned char *) tmp, strlen(tmp), len); } else { memcpy(buf, tmp, len); } ast_free(tmp); return 0; }
static int load_module | ( | void | ) | [static] |
Definition at line 166 of file func_aes.c.
References ast_custom_function_register, AST_MODULE_LOAD_DECLINE, and AST_MODULE_LOAD_SUCCESS.
{ int res = ast_custom_function_register(&aes_decrypt_function); res |= ast_custom_function_register(&aes_encrypt_function); return res ? AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS; }
static int unload_module | ( | void | ) | [static] |
Definition at line 160 of file func_aes.c.
References ast_custom_function_unregister().
{ int res = ast_custom_function_unregister(&aes_decrypt_function); return res | ast_custom_function_unregister(&aes_encrypt_function); }
struct ast_module_info __MODULE_INFO_SECTION __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "AES dialplan functions" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, } [static] |
Definition at line 173 of file func_aes.c.
struct ast_custom_function aes_decrypt_function [static] |
{ .name = "AES_DECRYPT", .read = aes_helper, }
Definition at line 155 of file func_aes.c.
struct ast_custom_function aes_encrypt_function [static] |
{ .name = "AES_ENCRYPT", .read = aes_helper, }
Definition at line 150 of file func_aes.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 173 of file func_aes.c.