+(NSString *)getMD_5StringWithString:(NSString *)intoString{
const char *cStr = [intoString UTF8String];
unsigned char digest[CC_MD5_DIGEST_LENGTH];
CC_MD5( cStr, (int)strlen(cStr), digest);
NSMutableString *result = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
{
[result appendFormat:@"%02x", digest[i]];
}
return result;
}