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00029 #include "asterisk.h"
00030
00031 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 328209 $")
00032
00033 #include "asterisk/module.h"
00034 #include "asterisk/pbx.h"
00035 #include "asterisk/utils.h"
00036 #include "asterisk/strings.h"
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00077 static int base64_helper(struct ast_channel *chan, const char *cmd, char *data,
00078 char *buf, struct ast_str **str, ssize_t len)
00079 {
00080 if (ast_strlen_zero(data)) {
00081 ast_log(LOG_WARNING, "Syntax: %s(<data>) - missing argument!\n", cmd);
00082 return -1;
00083 }
00084
00085 if (cmd[7] == 'E') {
00086 if (buf) {
00087 ast_base64encode(buf, (unsigned char *) data, strlen(data), len);
00088 } else {
00089 if (len >= 0) {
00090 ast_str_make_space(str, len ? len : ast_str_strlen(*str) + strlen(data) * 4 / 3 + 2);
00091 }
00092 ast_base64encode(ast_str_buffer(*str) + ast_str_strlen(*str), (unsigned char *) data, strlen(data), ast_str_size(*str) - ast_str_strlen(*str));
00093 ast_str_update(*str);
00094 }
00095 } else {
00096 int decoded_len;
00097 if (buf) {
00098 decoded_len = ast_base64decode((unsigned char *) buf, data, len);
00099
00100
00101 buf[decoded_len <= (len - 1) ? decoded_len : len - 1] = '\0';
00102 } else {
00103 if (len >= 0) {
00104 ast_str_make_space(str, len ? len : ast_str_strlen(*str) + strlen(data) * 3 / 4 + 2);
00105 }
00106 decoded_len = ast_base64decode((unsigned char *) ast_str_buffer(*str) + ast_str_strlen(*str), data, ast_str_size(*str) - ast_str_strlen(*str));
00107 if (len)
00108
00109
00110
00111 ast_str_buffer(*str)[decoded_len <= (len - 1) ? decoded_len : len - 1] = '\0';
00112 else
00113
00114 ast_str_buffer(*str)[decoded_len] = '\0';
00115
00116 ast_str_update(*str);
00117 }
00118 }
00119
00120 return 0;
00121 }
00122
00123 static int base64_buf_helper(struct ast_channel *chan, const char *cmd, char *data,
00124 char *buf, size_t len)
00125 {
00126 return base64_helper(chan, cmd, data, buf, NULL, len);
00127 }
00128
00129 static int base64_str_helper(struct ast_channel *chan, const char *cmd, char *data,
00130 struct ast_str **buf, ssize_t len)
00131 {
00132 return base64_helper(chan, cmd, data, NULL, buf, len);
00133 }
00134
00135 static struct ast_custom_function base64_encode_function = {
00136 .name = "BASE64_ENCODE",
00137 .read = base64_buf_helper,
00138 .read2 = base64_str_helper,
00139 };
00140
00141 static struct ast_custom_function base64_decode_function = {
00142 .name = "BASE64_DECODE",
00143 .read = base64_buf_helper,
00144 .read2 = base64_str_helper,
00145 };
00146
00147 static int unload_module(void)
00148 {
00149 return ast_custom_function_unregister(&base64_encode_function) |
00150 ast_custom_function_unregister(&base64_decode_function);
00151 }
00152
00153 static int load_module(void)
00154 {
00155 return ast_custom_function_register(&base64_encode_function) |
00156 ast_custom_function_register(&base64_decode_function);
00157 }
00158
00159 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "base64 encode/decode dialplan functions");