diff options
Diffstat (limited to 'agent/download-agent-encoding.c')
| -rwxr-xr-x | agent/download-agent-encoding.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/agent/download-agent-encoding.c b/agent/download-agent-encoding.c new file mode 100755 index 0000000..1955fcd --- /dev/null +++ b/agent/download-agent-encoding.c @@ -0,0 +1,282 @@ +/* + * Copyright (c) 2012 Samsung Electronics Co., Ltd All Rights Reserved + * + * Licensed under the Apache License, Version 2.0 (the License); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an AS IS BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <string.h> +#include <stdlib.h> +#include <glib.h> + +#include "download-agent-encoding.h" +#include "download-agent-debug.h" + +da_result_t _parsing_base64_encoded_str(const char *in_encoded_str, + char **out_charset_type, + char *out_encoding_type, + char **out_raw_encoded_str); + +da_bool_t is_base64_encoded_word(const char *in_str) +{ + const char *haystack = DA_NULL; + char first_needle[8] = {0,}; + char second_needle[8] = {0,}; + char *found_str = DA_NULL; + + if (!in_str) { + DA_LOG_ERR(Default, "input string is NULL"); + return DA_FALSE; + } + + haystack = in_str; + if (haystack[0] == '"') { + snprintf(first_needle, sizeof(first_needle), "%s", "\"=?"); // "=? + snprintf(second_needle, sizeof(second_needle), "%s", "?=\""); // ?=" + } else { + snprintf(first_needle, sizeof(first_needle), "%s", "=?"); // =? + snprintf(second_needle, sizeof(second_needle), "%s", "?="); // ?= + } + +// DA_SECURE_LOGD("needle = [%s], haystack = [%s]", first_needle, haystack); + + found_str = strstr(haystack, first_needle); + if (found_str) { + if (found_str == haystack) { +// DA_SECURE_LOGD("Input string is starting with %s", needle); + haystack = haystack + strlen(haystack) - strlen(second_needle); +// DA_SECURE_LOGD("second haystack is [%s]", haystack); + if(!strcmp(haystack, second_needle)) + return DA_TRUE; + } + } + return DA_FALSE; +} + +da_result_t decode_base64_encoded_str(const char *in_encoded_str, + char **out_decoded_ascii_str) +{ + da_result_t ret = DA_RESULT_OK; + + const char *org_str = DA_NULL; + char *charset_type = NULL; + char encoding_type = '\0'; + char *raw_encoded_str = NULL; + char *decoded_str = NULL; + const gchar *g_encoded_text = NULL; + guchar *g_decoded_text = NULL; + gsize g_decoded_text_len = 0; + + DA_SECURE_LOGD("input str = [%s]", in_encoded_str); + + org_str = in_encoded_str; + if(!org_str) { + DA_LOG_ERR(Default, "Input string is NULL"); + ret = DA_ERR_INVALID_ARGUMENT; + goto ERR; + } + + ret = _parsing_base64_encoded_str(org_str, &charset_type, + &encoding_type, &raw_encoded_str); + if(ret != DA_RESULT_OK) { + goto ERR; + } + +// DA_SECURE_LOGD("charset = [%s], encoding = [%c], raw = [%s]", charset_type, encoding_type, raw_encoded_str); + + if(encoding_type != 'B') { + DA_LOG_ERR(Default, "Encoded Word is not encoded with Base64, but %c. We can only handle Base64.", encoding_type); + ret = DA_ERR_INVALID_ARGUMENT; + goto ERR; + } + + /* + * on glib/gtype.h + * typedef char gchar; + * typedef unsigned char guchar; + * + */ + g_encoded_text = (const gchar*)raw_encoded_str; + g_decoded_text = g_base64_decode(g_encoded_text, &g_decoded_text_len); + + if(g_decoded_text) { + DA_SECURE_LOGD("g_decoded_text = [%s]", g_decoded_text); + decoded_str = (char*)calloc(1, g_decoded_text_len+1); + if(!decoded_str) { + DA_LOG_ERR(Default, "DA_ERR_FAIL_TO_MEMALLOC"); + ret = DA_ERR_FAIL_TO_MEMALLOC; + goto ERR; + } else { + memcpy(decoded_str, g_decoded_text, g_decoded_text_len); + } + } + DA_SECURE_LOGD("decoded_str = [%s]", decoded_str); + +ERR: + *out_decoded_ascii_str = decoded_str; + + if(charset_type) { + free(charset_type); + charset_type = NULL; + } + + if(raw_encoded_str) { + free(raw_encoded_str); + raw_encoded_str = NULL; + } + + if(g_decoded_text) { + g_free(g_decoded_text); + } + + return ret; +} + + +da_result_t _parsing_base64_encoded_str(const char *in_encoded_str, + char **out_charset_type, + char *out_encoding_type, + char **out_raw_encoded_str) +{ + da_result_t ret = DA_RESULT_OK; + + const char *org_str = DA_NULL; // e.g. =?UTF-8?B?7Jew7JWE7JmA7IKs7J6QLmpwZw==?= + char *charset_type = NULL; // e.g. UTF-8 + char encoding_type = '\0'; // e.g. B (means Base64) + char *raw_encoded_str = NULL; // e.g. 7Jew7JWE7JmA7IKs7J6QLmpwZw== + + char *haystack = DA_NULL; + char needle[8] = {0,}; + + char *wanted_str = DA_NULL; + int wanted_str_len = 0; + char *wanted_str_start = DA_NULL; + char *wanted_str_end = DA_NULL; + + org_str = in_encoded_str; + if (!org_str) { + DA_LOG_ERR(Default, "Input string is NULL"); + ret = DA_ERR_INVALID_ARGUMENT; + goto ERR; + } + + // strip "=?" + haystack = (char*)org_str; + snprintf(needle, sizeof(needle), "=?"); + wanted_str_end = strstr(haystack, needle); + if (!wanted_str_end) { + DA_LOG_ERR(Default, "DA_ERR_INVALID_ARGUMENT"); + ret = DA_ERR_INVALID_ARGUMENT; + goto ERR; + } else { + wanted_str = wanted_str_end + strlen(needle); + DA_SECURE_LOGD("strip [%s]", wanted_str); + } + + // for charset + haystack = wanted_str_start = wanted_str; + needle[0] = '?'; + wanted_str_end = strchr(haystack, needle[0]); + if (!wanted_str_end) { + DA_LOG_ERR(Default, "DA_ERR_INVALID_ARGUMENT"); + ret = DA_ERR_INVALID_ARGUMENT; + goto ERR; + } else { + wanted_str_len = wanted_str_end - wanted_str_start + 1; + wanted_str = (char*)calloc(1, wanted_str_len+1); + if (!wanted_str) { + DA_LOG_ERR(Default, "DA_ERR_FAIL_TO_MEMALLOC"); + ret = DA_ERR_FAIL_TO_MEMALLOC; + goto ERR; + } else { + snprintf(wanted_str, wanted_str_len+1, "%s", wanted_str_start); + charset_type = wanted_str; + wanted_str = DA_NULL; + } + + DA_LOG(Default, "charset [%s]", charset_type); + } + + + // for encoding + encoding_type = *(++wanted_str_end); + DA_LOG(Default, "encoding [%c]", encoding_type); + + // for raw encoded str + haystack = wanted_str_start = wanted_str_end + 1; + snprintf(needle, sizeof(needle), "?="); + wanted_str_end = strstr(haystack, needle); + if (!wanted_str_end) { + DA_LOG_ERR(Default, "DA_ERR_INVALID_ARGUMENT"); + ret = DA_ERR_INVALID_ARGUMENT; + goto ERR; + } else { + wanted_str_len = wanted_str_end - wanted_str_start + 1; + wanted_str = (char*)calloc(1, wanted_str_len+1); + if (!wanted_str) { + DA_LOG_ERR(Default, "DA_ERR_FAIL_TO_MEMALLOC"); + ret = DA_ERR_FAIL_TO_MEMALLOC; + goto ERR; + } else { + snprintf(wanted_str, wanted_str_len+1, "%s", wanted_str_start); + raw_encoded_str = wanted_str; + wanted_str = NULL; + } + + DA_SECURE_LOGD("raw encoded str [%s]", raw_encoded_str); + } + +ERR: + if (ret != DA_RESULT_OK) { + if (charset_type) { + free(charset_type); + charset_type = NULL; + } + } + + *out_charset_type = charset_type; + *out_encoding_type = encoding_type; + *out_raw_encoded_str = raw_encoded_str; + + return ret; +} + +void decode_url_encoded_str(const char *in_encoded_str, char **out_str) +{ + char *in = NULL; + char *out = NULL; + *out_str = calloc(1, strlen(in_encoded_str) + 1); + if (*out_str == NULL) + return; + out = *out_str; + in = (char *)in_encoded_str; + while (*in) + { + if (*in == '%') { + int hex = 0; + in++; + if (sscanf(in, "%2x", &hex) <= 0) { + return; + } else { + *out = hex; + in++; + } + } else if (*in == '+') { + *out = ' '; + } else { + *out = *in; + } + in++; + out++; + } +} + |