#include "asterisk.h"
#include "asterisk/module.h"
#include "asterisk/pbx.h"
#include "asterisk/app.h"
#include "asterisk/crypto.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 | __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "AES dialplan functions" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = "8586c2a7d357cb591cc3a6607a8f62d1" , .load = load_module, .unload = unload_module, .nonoptreq = "res_crypto", } |
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 |
Definition in file func_aes.c.
#define AES_BLOCK_SIZE 16 |
static void __reg_module | ( | void | ) | [static] |
Definition at line 180 of file func_aes.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 180 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 86 of file func_aes.c.
References AES_BLOCK_SIZE, args, ast_aes_decrypt(), ast_aes_encrypt(), ast_aes_set_decrypt_key(), ast_aes_set_encrypt_key(), 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.
00088 { 00089 unsigned char curblock[AES_BLOCK_SIZE] = { 0, }; 00090 char *tmp; 00091 char *tmpP; 00092 int data_len, encrypt; 00093 ast_aes_encrypt_key ecx; /* AES 128 Encryption context */ 00094 ast_aes_decrypt_key dcx; 00095 00096 AST_DECLARE_APP_ARGS(args, 00097 AST_APP_ARG(key); 00098 AST_APP_ARG(data); 00099 ); 00100 00101 AST_STANDARD_APP_ARGS(args, data); 00102 00103 if (ast_strlen_zero(args.data) || ast_strlen_zero(args.key)) { 00104 ast_log(LOG_WARNING, "Syntax: %s(<key>,<data>) - missing argument!\n", cmd); 00105 return -1; 00106 } 00107 00108 if (strlen(args.key) != AES_BLOCK_SIZE) { /* key must be of 16 characters in length, 128 bits */ 00109 ast_log(LOG_WARNING, "Syntax: %s(<key>,<data>) - <key> parameter must be exactly 16 characters!\n", cmd); 00110 return -1; 00111 } 00112 00113 ast_aes_set_encrypt_key((unsigned char *) args.key, &ecx); /* encryption: plaintext -> encryptedtext -> base64 */ 00114 ast_aes_set_decrypt_key((unsigned char *) args.key, &dcx); /* decryption: base64 -> encryptedtext -> plaintext */ 00115 tmp = ast_calloc(1, len); /* requires a tmp buffer for the base64 decode */ 00116 tmpP = tmp; 00117 encrypt = strcmp("AES_DECRYPT", cmd); /* -1 if encrypting, 0 if decrypting */ 00118 00119 if (encrypt) { /* if decrypting first decode src to base64 */ 00120 ast_copy_string(tmp, args.data, len); 00121 data_len = strlen(tmp); 00122 } else { 00123 data_len = ast_base64decode((unsigned char *) tmp, args.data, len); 00124 } 00125 00126 if (data_len >= len) { /* make sure to not go over buffer len */ 00127 ast_log(LOG_WARNING, "Syntax: %s(<keys>,<data>) - <data> exceeds buffer length. Result may be truncated!\n", cmd); 00128 data_len = len - 1; 00129 } 00130 00131 while (data_len > 0) { 00132 memset(curblock, 0, AES_BLOCK_SIZE); 00133 memcpy(curblock, tmpP, (data_len < AES_BLOCK_SIZE) ? data_len : AES_BLOCK_SIZE); 00134 if (encrypt) { 00135 ast_aes_encrypt(curblock, (unsigned char *) tmpP, &ecx); 00136 } else { 00137 ast_aes_decrypt(curblock, (unsigned char *) tmpP, &dcx); 00138 } 00139 tmpP += AES_BLOCK_SIZE; 00140 data_len -= AES_BLOCK_SIZE; 00141 } 00142 00143 if (encrypt) { /* if encrypting encode result to base64 */ 00144 ast_base64encode(buf, (unsigned char *) tmp, strlen(tmp), len); 00145 } else { 00146 memcpy(buf, tmp, len); 00147 } 00148 ast_free(tmp); 00149 00150 return 0; 00151 }
static int load_module | ( | void | ) | [static] |
Definition at line 169 of file func_aes.c.
References aes_decrypt_function, aes_encrypt_function, ast_custom_function_register, AST_MODULE_LOAD_DECLINE, and AST_MODULE_LOAD_SUCCESS.
00170 { 00171 int res = ast_custom_function_register(&aes_decrypt_function); 00172 res |= ast_custom_function_register(&aes_encrypt_function); 00173 return res ? AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS; 00174 }
static int unload_module | ( | void | ) | [static] |
Definition at line 163 of file func_aes.c.
References aes_decrypt_function, aes_encrypt_function, and ast_custom_function_unregister().
00164 { 00165 int res = ast_custom_function_unregister(&aes_decrypt_function); 00166 return res | ast_custom_function_unregister(&aes_encrypt_function); 00167 }
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "AES dialplan functions" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = "8586c2a7d357cb591cc3a6607a8f62d1" , .load = load_module, .unload = unload_module, .nonoptreq = "res_crypto", } [static] |
Definition at line 180 of file func_aes.c.
struct ast_custom_function aes_decrypt_function [static] |
Initial value:
{ .name = "AES_DECRYPT", .read = aes_helper, }
Definition at line 158 of file func_aes.c.
Referenced by load_module(), and unload_module().
struct ast_custom_function aes_encrypt_function [static] |
Initial value:
{ .name = "AES_ENCRYPT", .read = aes_helper, }
Definition at line 153 of file func_aes.c.
Referenced by load_module(), and unload_module().
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 180 of file func_aes.c.