//MD5加密

+(NSString*)md5:(NSString*)sourceStr{

constchar*cStr = [sourceStrUTF8String];

unsignedcharresult[CC_MD5_DIGEST_LENGTH];

CC_MD5(cStr, (CC_LONG)strlen(cStr), result);

return[NSStringstringWithFormat:@"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",

result[0], result[1], result[2], result[3], result[4], result[5], result[6], result[7],

result[8], result[9], result[10], result[11], result[12], result[13], result[14], result[15]];

}