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https://github.com/xorgy/mediafire-fuse
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Refactor code into utils, mfapi and mfshell
- utils is the low level library used by the others - mfapi uses utils and implements the api and some wrappers - mfshell uses mfapi and utils to provide a shell
This commit is contained in:
josch
238
mfapi/mfconn.c
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238
mfapi/mfconn.c
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/*
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* Copyright (C) 2013 Bryan Christ <bryan.christ@mediafire.com>
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* 2014 Johannes Schauer <j.schauer@email.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2, as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include <stdio.h>
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#include <curl/curl.h>
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#include <openssl/ssl.h>
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#include <openssl/sha.h>
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#include <openssl/md5.h>
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#include "../utils/strings.h"
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#include "mfconn.h"
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#include "apicalls.h"
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typedef struct _mfconn_s mfconn_t;
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struct _mfconn_s
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{
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char *server;
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uint32_t secret_key;
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char *secret_time;
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char *session_token;
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};
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mfconn_t*
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mfconn_create(char *server, char *username, char *password, int app_id, char *app_key)
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{
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mfconn_t *mfconn;
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int retval;
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mfconn = (mfconn_t *)calloc(1,sizeof(mfconn_t));
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mfconn->server = strdup(server);
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retval = mfconn_api_user_get_session_token(mfconn, mfconn->server,
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username, password, app_id, app_key, &(mfconn->secret_key),
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&(mfconn->secret_time), &(mfconn->session_token));
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if (retval == 0)
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return mfconn;
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else
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return NULL;
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}
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void
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mfconn_destroy(mfconn_t *mfconn)
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{
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free(mfconn->server);
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free(mfconn->secret_time);
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free(mfconn->session_token);
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free(mfconn);
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}
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void
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mfconn_update_secret_key(mfconn_t *mfconn)
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{
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uint64_t new_val;
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if(mfconn == NULL) return;
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new_val = ((uint64_t)mfconn->secret_key) * 16807;
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new_val %= 0x7FFFFFFF;
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mfconn->secret_key = new_val;
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return;
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}
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char*
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mfconn_create_user_signature(mfconn_t *mfconn, char *username, char *password,
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int app_id, char *app_key)
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{
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char *signature_raw;
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unsigned char signature_enc[20]; // sha1 is 160 bits
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unsigned char signature_hex[41];
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int i;
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if(mfconn == NULL) return NULL;
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signature_raw = strdup_printf("%s%s%d%s",
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username, password, app_id, app_key);
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SHA1((const unsigned char *)signature_raw,
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strlen(signature_raw),signature_enc);
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free(signature_raw);
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for(i = 0;i < 20;i++)
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{
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sprintf(&signature_hex[i*2],"%02x",signature_enc[i]);
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}
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signature_hex[40] = '\0';
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return strdup((const char *)signature_hex);
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}
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char*
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mfconn_create_call_signature(mfconn_t *mfconn,char *url,char *args)
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{
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char *signature_raw;
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unsigned char signature_enc[16]; // md5 is 128 bits
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unsigned char signature_hex[33];
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char *api;
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int i;
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if(mfconn == NULL) return NULL;
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if(url == NULL) return NULL;
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if(args == NULL) return NULL;
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// printf("url: %s\n\rargs: %s\n\r",url,args);
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api = strstr(url,"/api/");
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if(api == NULL) return NULL;
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signature_raw = strdup_printf("%d%s%s%s",
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(mfconn->secret_key % 256),
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mfconn->secret_time,
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api,args);
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MD5((const unsigned char *)signature_raw,
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strlen(signature_raw),signature_enc);
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free(signature_raw);
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for(i = 0;i < 16;i++)
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{
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sprintf(&signature_hex[i*2],"%02x",signature_enc[i]);
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}
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signature_hex[32] = '\0';
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return strdup((const char *)signature_hex);
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}
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char*
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mfconn_create_signed_get(mfconn_t *mfconn,int ssl,char *api,char *fmt,...)
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{
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char *api_request = NULL;
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char *api_args = NULL;
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char *signature;
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char *call_hash;
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char *session_token;
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int bytes_to_alloc;
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int api_request_len;
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int api_args_len;
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int api_len;
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va_list ap;
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if(mfconn == NULL) return NULL;
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if(mfconn->server == NULL) return NULL;
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if(mfconn->secret_time == NULL) return NULL;
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if(mfconn->session_token == NULL) return NULL;
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// make sure the api (ex: user/get_info.php) is sane
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if(api == NULL) return NULL;
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api_len = strlen(api);
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if(api_len < 3) return NULL;
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// calculate how big of a buffer we need
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va_start(ap, fmt);
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api_args_len = (vsnprintf(NULL, 0, fmt, ap) + 1); // + 1 for NULL
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va_end(ap);
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session_token = strdup_printf("&session_token=%s", mfconn->session_token);
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api_args_len += strlen(session_token);
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// create the correctly sized buffer and process the args
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api_args = (char*)calloc(api_args_len,sizeof(char));
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// printf("\n\r%d\n\r",api_args_len);
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va_start(ap, fmt);
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vsnprintf(api_args, api_args_len, fmt, ap);
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va_end(ap);
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strcat(api_args, session_token);
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free(session_token);
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// correct user error of trailing slash
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if(api[api_len - 1] == '/') api[api_len - 1] = '\0';
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api_request = strdup_printf("%s//%s/api/%s",
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(ssl ? "https:" : "http:"), mfconn->server,api);
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call_hash = mfconn_create_call_signature(mfconn,api_request,api_args);
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signature = strdup_printf("&signature=%s",call_hash);
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free(call_hash);
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// compute the amount of space requred to realloc() the request
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bytes_to_alloc = api_args_len;
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bytes_to_alloc += strlen(api_request);
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bytes_to_alloc += strlen(signature);
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bytes_to_alloc += 1; // null termination
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// append api GET args to api request
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api_request = (char*)realloc(api_request,bytes_to_alloc);
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strncat(api_request,api_args,api_args_len);
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strcat(api_request,signature);
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free(signature);
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free(api_args);
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return api_request;
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}
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const char*
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mfconn_get_session_token(mfconn_t *mfconn)
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{
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return mfconn->session_token;
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}
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const char*
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mfconn_get_secret_time(mfconn_t *mfconn)
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{
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return mfconn->secret_time;
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}
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uint32_t
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mfconn_get_secret_key(mfconn_t *mfconn)
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{
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return mfconn->secret_key;
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}
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