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00025 #include "asterisk.h"
00026
00027 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 301849 $")
00028
00029 #include "asterisk/module.h"
00030 #include "asterisk/pbx.h"
00031 #include "asterisk/utils.h"
00032 #include "asterisk/strings.h"
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00073 static int base64_helper(struct ast_channel *chan, const char *cmd, char *data,
00074 char *buf, struct ast_str **str, ssize_t len)
00075 {
00076 if (ast_strlen_zero(data)) {
00077 ast_log(LOG_WARNING, "Syntax: %s(<data>) - missing argument!\n", cmd);
00078 return -1;
00079 }
00080
00081 if (cmd[7] == 'E') {
00082 if (buf) {
00083 ast_base64encode(buf, (unsigned char *) data, strlen(data), len);
00084 } else {
00085 if (len >= 0) {
00086 ast_str_make_space(str, len ? len : ast_str_strlen(*str) + strlen(data) * 4 / 3 + 2);
00087 }
00088 ast_base64encode(ast_str_buffer(*str) + ast_str_strlen(*str), (unsigned char *) data, strlen(data), ast_str_size(*str) - ast_str_strlen(*str));
00089 ast_str_update(*str);
00090 }
00091 } else {
00092 int decoded_len;
00093 if (buf) {
00094 decoded_len = ast_base64decode((unsigned char *) buf, data, len);
00095
00096
00097 buf[decoded_len <= (len - 1) ? decoded_len : len - 1] = '\0';
00098 } else {
00099 if (len >= 0) {
00100 ast_str_make_space(str, len ? len : ast_str_strlen(*str) + strlen(data) * 3 / 4 + 2);
00101 }
00102 decoded_len = ast_base64decode((unsigned char *) ast_str_buffer(*str) + ast_str_strlen(*str), data, ast_str_size(*str) - ast_str_strlen(*str));
00103 if (len)
00104
00105
00106
00107 ast_str_buffer(*str)[decoded_len <= (len - 1) ? decoded_len : len - 1] = '\0';
00108 else
00109
00110 ast_str_buffer(*str)[decoded_len] = '\0';
00111
00112 ast_str_update(*str);
00113 }
00114 }
00115
00116 return 0;
00117 }
00118
00119 static int base64_buf_helper(struct ast_channel *chan, const char *cmd, char *data,
00120 char *buf, size_t len)
00121 {
00122 return base64_helper(chan, cmd, data, buf, NULL, len);
00123 }
00124
00125 static int base64_str_helper(struct ast_channel *chan, const char *cmd, char *data,
00126 struct ast_str **buf, ssize_t len)
00127 {
00128 return base64_helper(chan, cmd, data, NULL, buf, len);
00129 }
00130
00131 static struct ast_custom_function base64_encode_function = {
00132 .name = "BASE64_ENCODE",
00133 .read = base64_buf_helper,
00134 .read2 = base64_str_helper,
00135 };
00136
00137 static struct ast_custom_function base64_decode_function = {
00138 .name = "BASE64_DECODE",
00139 .read = base64_buf_helper,
00140 .read2 = base64_str_helper,
00141 };
00142
00143 static int unload_module(void)
00144 {
00145 return ast_custom_function_unregister(&base64_encode_function) |
00146 ast_custom_function_unregister(&base64_decode_function);
00147 }
00148
00149 static int load_module(void)
00150 {
00151 return ast_custom_function_register(&base64_encode_function) |
00152 ast_custom_function_register(&base64_decode_function);
00153 }
00154
00155 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "base64 encode/decode dialplan functions");