HTML decoding on the other hand is an opposite of encoding. Base36 Encoder/Decoder in C#. : Base64 « Development Class « Java. The ENCODE function converts the binary RAW input to its BASE64 encoded form and the DECODE function accepts the BASE64 encoded form of the RAW data and converts back to its original format. The default behavior is to follow the default of the selected variant. slen: The length of the base32 string, or APR_ENCODE_STRING if NUL terminated. Use −−ignore−garbage to attempt to recover from any other non−alphabet bytes in the encoded stream. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. For example I type decode QWxhZGRpbjpvcGVuIHNlc2FtZQ== and it prints Aladdin:open sesame and returns to the prompt. Re: Alternate Alphabet for Base32 Encoding & Decoding The lookup array actually a parallel data structure, and it needs to be 256 elements in size. 1 people like it. a guest Apr 24th, 2012 448 Never Not a member of Pastebin yet? Sign Up, it unlocks many cool features! raw download clone.  Base32 encoding algorithm is designed to encode any binary data, an stream of bytes, into a stream of 32-printable characters. Replacement string Base64 (and a Base32) conversion [closed] returns>The input byte-array encoded into a Base32 string, following the provided options. 2$ echo -n 'hello' | base32. base16 encoder / text 2 hex. Rancangan program ini hanya menganalisis proses dari encoding keamanan data tersebut, tidak membahas tentang algoritma base16, base32 dan base64 1. This module provides data encoding and decoding as specified in RFC 3548. Decode base62-encoded text. perl is 7065726c. Encode-Decode Binary; Base32 Encoding; Base32 Decoding; Base64 Encoding-Decoding; Base64 Encode File; Base64 Decode File; MD5 Hash Generator; SHA-1 Hash Generator; Encode-Decode ROT13 ROT5 ROT18 ROT47 ROT30; Programming Tools; Online HTML CSS JS Editor; HTML/Text2JavaScript Converter; DropDown Menu Maker; Online Compilers; Paste Code - Share. Base64 encoding and decoding. Code faster with the Kite plugin for your code editor, featuring Line-of-Code Completions and cloudless processing. So far I have tried a simple bash file containing python -m base64 -d $1 but this command expects a filename not a string. A simple tool to convert between various forms of representation of GUIDs or UUIDs. 1 Tujuan Penelitian Tujuan dari Skripsi ini adalah merancang suatu sistem yang dapat memberikan informasi mengenai analisis encoding antara algoritma base16. Un outil en ligne pour décoder une chaîne hexagonale. The alphabet is specified in Differential Unicode Domain Encoding (DUDE). By not using the letter O, for example, it avoids confusion with the digit 0. I've written some flexible standards based implementations of various Base32 and Base64 encoding/decoding methods.  If you are trying to implement Base32 encoding in C++, you can look at the source code developed by Vasian Cepa at madebits. Base32 --version 1. There are also a number of references that come up quickly on google that will explain base32 encoding. This was created to help decrypt the Kryptos sculpture. Online tool to translate ASCII/ANSI, Hexadecimal, Binary, Base64, Decimal. Encoder that encodes using the MIME type base64 encoding scheme. There is no such method to decode the stream, unfortunately. FromBase64String – something like this for base32 would be perfect. 5 Version of this port present on the latest quarterly branch. Software602, Inc.  Base32 encoding algorithm is designed to encode any binary data, an stream of bytes, into a stream of 32-printable characters. In the base-32 encoding described here, if the encoder and decoder both know the exact length of the data in bits (modulo 40), then they can use this shared information to optimize the size of the transmitted (encoded) string. base32 encoder Encode text to base32, as per RFC-4648. blob: 6fd574bb73b40aa99a99531938d1cc51f4ff2cc4 [] [] []. 1 For projects that support PackageReference , copy this XML node into the project file to reference the package. Dec 22, 2015 · Here is a list of tools that can help you with decoding Niantic Project clues and finding Ingress passcodes. Base decoding can be used in new applications that do not have legacy restrictions because it allows the manipulation of objects with text editors. They are, BASE64_ENCODE and BASE64_DECODE Functions. Base32 Encoder and Decoder in C#. When decoding, the input may contain newlines in addition to the bytes of the formal base32 alphabet. Base36 encoding is used for e. Instant free online tool for base-32 to binary conversion or vice versa. base 32 encoding mentioned in RFC4648. Earlier this week, I looked at converting a binary value into a "bit stream" that would allow for sub-byte reads. I've searched this list for similar questions, the Global Module Index, the Vaults of Parnassus, as well as the obvious (Google); however , I cannot seem to find anything on point. Binary version: 01101000 01100101 01101100 01101100 01101111. It is provided without any warranty that it will serve your work or purpose or for whatever usage you might deem of. Here you can find tools for text manipulating, basic conversions like text to ASCII, HEX to Base64. Decoder that decodes using the URL and Filename safe type base64 encoding scheme. Nov 09, 2019 · Download Universal Encoder Decoder - AyaN Softwar for free. Apr 15, 2009 · Base32 encoding seemed good enough, but Wikipedia told me that there is a modified version of Base32 encoding called zBase32 encoding which has the following advantages over plain Base32 encoding: It reduces the number of potentially confusing characters. It is more efficient than hexadecimal, representing 25% more bits per character. hexExtend: pass true to use the hex. About this tool. The most widely used Base32 character set is defined in RFC 3548. Depending on the abstraction level and context, corresponding code points and the resulting code space may be regarded as bit patterns, octets, natural numbers, electrical pulses, etc. As its base implies, this number system uses sixteen symbols to represent numbers. (simplycalc) base16 / hexadecimal decoder. ::base32::hex::decode estring. Download BASE32 Encoder Description. Software602, Inc. Binary to base32. In octal, that is 8 3-1 which is 64. Encoding according to rfc4648. This is an implementation of HOTP and TOTP which are commonly used for multi factor authentication by using a shared key between the client and the server to generate and verify one time use codes. I have a binary file (base32 encoded) and a ASCII version of the same binary file. How can you use the Encoding. Originally posted by Kym Thompson: Or are you just unsure how to turn a non-digit character into a numeric value? I think that is my problem. Python String encode() Method - Python string method encode() returns an encoded version of the string. Kite is a free autocomplete for Python developers. URL-decoding replaces sequences of % and character codes with their corresponding character symbols, making the input text readable for people. Created for developers by developers from team Browserling. Decode base62-encoded text. It can be used for out of band communication of public keys. An example of a hexadecimal number is 3BF2. Decode a string that has been url encoded. Find this useful? Enter your email to receive occasional updates for securing PHP code. It works the same way as Base64 but the bits are grouped by 5 this time. Useful Links Quick Start Devices Download Documentation Source Code. Software602, Inc. Merging the two would only result in replacing two clear and concise articles with a single long and confusing article. Escape merely outputs null bytes as \000 and doubles backslashes. DecodeString returns the bytes represented by the base256 string s. Discover a universal assistant for all of your unit conversion needs - download the free demo version right away!. They are outstanding, consisting of the finest technical recruiters I have ever worked with — and I have contact with a large number of recruiters. Provides digital signature creation and verification. This ostream base32-encodes all data written to it and forwards it to a connected ostream. This function takes a single argument which is the string to decode and returns the decoded data. heres what i could finally do. I see no reason to not have both: 1) a specification for encoding a single number, and 2) a specification for a data encoding that operates on octets and must be zero-padded to the right if the final bit count is not a multiple of 5 and 8 -- like regular base64, base32, or the Zooko-base32 encoding. NewEncoding function usage examples. All characters that are not 0 or 1 will be removed before processing the string. base16 decoder / hex 2 text. We wait 60 seconds before “ticking. Prolog-based base32 encoding using DCG rules. 18 specifies web services (using the HTTP family of protocols) for managing and distributing DICOM (Digital Imaging and Communications in Medicine) Information Objects, such as medical images, annotations, reports, etc. This function uses the user default encoding in effect at the time the string was encoded. Issue: In decoding string i am getting " " special character instead of "é" Why does a base64 encoded string have an = sign at the end I know what base64 encoding is and how to calculate base64 encoding in C#, however I have seen several times that when I convert a string into base64, there is an = at the end. C Language Implementation of Base64 Encoding and Decoding Base64 encoding and decoding schemes are commonly used to encode binary data. La liste d'outils. Base32 encoding (and Base64) encoding is motivated by situations where you need to encode unrestricted binary within a storage or transport system that allow only data of a certain form such as plain text. The Message Encoder will encode and decode messages for you based on a simple encoding scheme. Base64 Decode + Inflate. This function takes a single argument which is the string to decode and returns the decoded data. Sounds good. Jun 20, 2015 · A binary encoding, such as “base64”, represents non-character binary data in printable string form. Base32 Encoder and Decoder in C#. 'RFC4648' - Base32 from RFC4648 'RFC4648-HEX' - base32hex from RFC4648 'Crockford' - Crockford's Base32; Options may have a padding property which provides a way to forcefully enable or disable padding. This guarantees that the data stays unchanged without modification during transfer. The choice of 36 is convenient in that the digits can be represented using the Arabic numerals 0–9 and the Latin letters A–Z (the ISO basic Latin alphabet). Base32hex is a base32 variant using different alphabet, that is "0123456789ABCDEFGHIJKLMNOPQRSTUV". chromium / chromiumos / platform / ec / master /. The "len" arguments * define how many bytes will be read from the "plain" buffer. Your problem is that that input data isn't Base32 encoded. Supported types are: base64, hex, escape. URL encoding is needed to convert the special characters to a standard form which otherwise may have some different meaning. In Java 8, we can use three types of Base64 encoding. 58 has been released! (November 17 th 2019) This is a small update that addresses a number of issues reported by users since the last release. This online tool allows you to encode text into binary and decode binary back to text. eDock Server is a secure document server that provides fast and convenient access to your. Base32 encoding only uses the characters A-Z (capital only), 2-7, and =. Base32 encoding/decoding class. Encode encodes src into EncodedLen(len(src)) bytes of dst. Convert text into hexadecimal format. decode(s[, checksum=False[, strict=False]]) Decode an encoded symbol string. Here is a Text numbers: hello. NET Framework, including Managed Extensibility Framework (MEF), Charting Controls, CardSpace, Windows Identity Foundation (WIF), Point of Sale (POS), Transactions. The Base32Encoder encodes bytes into base 32 characters. (simplycalc) base16 / hexadecimal decoder. The encoding pads the output to a multiple of 8 bytes, so Encode is not appropriate for use on individual blocks of a large data stream. Base32 decodes data using DUDE encoding. The first program linked below accepts a sequence of hexadecimal bytes as a parameter and outputs the resulting Base64 encoding. Supports standard Base32 with padding characters (=) per Base32 from RFC 4648. Most entries are marked as invalid. It's intended to be a human-friendly -- you don't have to worry about punctuation, capitalization, or letters/numbers that are easy to confuse, making it easier to transmit in handwriting or over the phone. Also, explore tools to convert base-32 or decimal to other numbers units or learn more about numbers conversions. Free BMW VIN Decoder. I scan the base32 encrypted, I want the query to look for the result in the base10 numbers. Comments on bad style are welcome. net framework. base32-address moneropedia monero. The FreeVBCode site provides free Visual Basic code, examples, snippets, and articles on a variety of other topics as well. PostgreSQL encode() Encode binary data to different representation. Here's a simple. This guarantees that the data stays unchanged without modification during transfer. Basically, Base64 is a collection of related encoding designs which represent the binary information in ASCII format by converting it into a base64 representation. Base32 Decoder web developer and programmer tools World's simplest base32 decode. I need to figure out a way to convert the binary file to asciii fixed length file so that i can load it contents into oracle table. Crockford recommends the following check sum. Base32 Encoding and Decoding in C#. The type of encoding used is send to the server in form of header information so that it can be easily and correctly parsed by the browsers. ogg encoder - decoder, free download. Base32 Encoding Tool Online Free. The encoding scheme is required to — Be human readable and machine readable. Base decoding can be used in new applications that do not have legacy restrictions because it allows the manipulation of objects with text editors. Thanks in advance. Play xfinity's Decoder. 3: vorbis is a new audio format that may well be the end off your mp3 collection. This package has five subprograms for encoding and decoding. The Base32 encoding is designed to represent arbitrary sequences of octets in a form that needs to be case insensitive but need not be humanly readable. Base32 encoder/decoder for hex string. Convert (encode or decode) UTF-8 (hex) characters like a champ. It also discusses the use of line-feeds in encoded data, use of padding in encoded data, use of non-alphabet characters in encoded data, use of different encoding alphabets, and canonical encodings. Replacement string Base64 (and a Base32) conversion [closed] returns>The input byte-array encoded into a Base32 string, following the provided options. ## known issues currently the encoding is only available in imported modules so trying to run emoji encoded file directly will fail: ``` $ python emoji. ::base32::decode estring This commands takes the estring and decodes it under the assumption that it is a valid base32. Consider the following decimal numbers and their Base32 and Base64 equivalents. Convert (encode or decode) UTF-8 (hex) characters like a champ. Earlier this week, I looked at converting a binary value into a "bit stream" that would allow for sub-byte reads. @aureooms/js-codec-base32. Enter the text, and then execute by pressing the button(s). delinka on Nov 15, 2014. Hex or base 16 or hexadecimal is a numeral system that uses 16 symbols. Provides encoding functionality for Base64, quoted-printable, and hex-encoding. Base64 encoding is designed to make binary data survive transportation through layers that are not 8-bit clean, such as mail bodies. The interface is designed with simplicity at its heart. Dec 28, 2018 · The previous post looked at Crockford’s base 32 encoding, a minor variation on the way math conventionally represents base 32 numbers, with concessions for human use. Description These two functions will convert a string to base32 encoding, using a restricted set of 32 characters, which you can change as desired. It’s less efficient than base 64, representing 17% fewer bits per character, but is more legible than base 64 encoding because it eliminates commonly confused characters. Sep 20, 2016 · Base32 Encoding and Decoding in C# public static class Base32 { private static readonly char [] DIGITS; private static readonly int MASK;. base64 — RFC 3548: Base16, Base32, Base64 Data Encodings¶. Number convertor. base 64 encoding, as in MIME::Base64. On this section you can also create a new md5 hash base on any text or just apply another algorithm to generate hashes like sha1 or crypt. Golang encoding/base32. In this paper, we address alternatives to these encoding methods. It assumes the only symbols being used are A. Just home-brewed code that does any base encoding. The format applies no further compression and achieves the space efficiency of 3. ip et port à encoder/décoder : valider. base32-encode - Base32 encoder. This class can be used to encode and decode data using the ASCII85 algorithm. Hexadecimal (base 16) and octal (base 8) are sometimes used in programming, as a short-hand for binary. And I had to implement Base 64 encoding by myself. Just paste base64 encoded data and press "decode from base64" button. s is the string to decode. Currently it provides functions to encode and decode data using the algorithms for base64, base32, base16 and hexadecimal. I'm looking for a quick and easy way to implement a process to convert Base-10 numbers to Base-32 numbers, within Excel. base32-address moneropedia monero. The number of bits per character is not a problem for Base 64 Encoding. Base32 Encoding Base32 Encoding Algorithm Base32 Character Set Maps Bitpedia Implementation of Base32 in Java Bitpedia Implementation of Base32 in Java - Test Andre's Implementation of Base32 in PHP Andre's Implementation of Base32 in PHP - Test madebits Implementation of Base32 in C++ URL Encoding, URI Encoding, or Percent Encoding. exe setup, evaluation version with help and samples. Decode the data in input. The errors may be given to set. ::base32::decode estring This commands takes the estring and decodes it under the assumption that it is a valid base32. Binary decoder: Online binary to text translator. One potential compatibility issue of Ascii85 is that 'single' and "double" quotation marks, brackets, and ampersands (&) cannot be used unescaped in markup languages like XML or SGML. BASE32 Encoder; CRC 8-16-32 Encoder; Crypt Encoder; Str_rot13 Encoder; Strrev Encoder; Convert_uu Encoder; Bin2Hex Encoder; UTF8 Encoder; Url Encoder; Rawurl Encoder; BASE64 Image Encoder; HTML Escape Encoder; Decoders. Notably: base64url (per rfc4648) and its base32 equivalent. Use NewEncoder() instead. Base58 is a group of binary-to-text encoding schemes used to represent large integers as alphanumeric text, introduced by Satoshi Nakamoto for use with Bitcoin. Advantages of Base32 over Base64. Notice: Undefined index: HTTP_REFERER in C:\xampp\htdocs\pqwqc\5blh. The key can be any length but cannot have any repeating characters. Gentoo package dev-ruby/base32: A library which provides base32 decoding and encoding in the Gentoo Packages Database. Base64 encoding is commonly used from the encryption with binary data and sometimes you might need to understand what is the information is being encoded from the data. It is inefficient, but it is a simple, commonly-used way to represent binary data in plain text. com/2011/07/google-totp-two-factor-authentication-for-php/ * for more details. base64 — RFC 3548: Base16, Base32, Base64 Data Encodings¶. I want to write about how I did that in Powershell, but you might need to know what an encoding is first. Small library to generate, encode and decode random base32 strings. Base32 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers. Base32 string: Cleaned-up string (uppercase only, fixed common mistypes like 8 - B, removed characters outside base32 set): Options: 0x separator for output. ) Now, you are the. 7: static Base64. Decode a base32 string by calling the decode_base32() function. With Java 8, Base64 has finally got its due. You can use base64 encoded data as simple encryption mechanism. NewEncoder function examples. Firstly, choose the type of encoding tool in the Tool field. Free online ASCII codes to string converter. Decode the data in input. Comments on bad style are welcome. I’ve written some flexible standards based implementations of various Base32 and Base64 encoding/decoding methods. Encoding according to rfc4648. You can use UTL_ENCODE functions to encode the body of email text. pl -- Base32 encoding and decoding. Hi, I want to encode/decode a XSTRING with BASE32 from RFC 4648. Encoder getUrlEncoder() Returns a Base64. A pretty strong cipher for beginners, and one that can be done on paper easily. There are 3 output character sets available: * RFC 3548 (A-Z2-7) * Safe (0-9A-HJKMNP-TV-Z) * Hex like (0-9A-V) Base 32 is similar to base 64, except that it uses only letters and digits, but no. Note that while the encoder will generate only uppercase characters this decoder accepts input in lowercase as well. Did you read the accompanying webpage with a small explanation?. encode ( ' Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a perseverance of delight in the continued and indefatigable generation of knowledge, exceeds the short vehemence of any carnal pleasure. How to convert Base 32 strings to Base 10 strings in Excel Certain IDs compress the ID number as a base 32 number - for example, the string 18QB8PP represents ID number 1369809721. The Base 32 encoding is designed to represent arbitrary sequences of octets in a form that needs to be case insensitive but need not be humanly readable. Parameters. 4 Tujuan Dan Manfaat Penelitian 1. Introduction Base encoding of data is used in many situations to store or transfer data in environments that, perhaps for legacy reasons, are restricted to only US-ASCII [] data. He says: "[Base32 Encoding is] a 32-symbol notation for expressing numbers in a form that can be conveniently and accurately transmitted between humans and computer systems. package encoding/base32. --- DvDmanDT <[EMAIL PROTECTED]> wrote: > I've never even heard of base32. Recently I faced a need to convert regular byte array to Base32 and back. hashing algorithms. By default the Base32Url class encodes with only the characters A to Z and 2 to 7. Here is the code for converting an image to a string. Just paste your data in the form below, press Base32 Decode button, and you get a base32 decoded string. Base32 is one of several base 32 transfer encodings. Encode Text - Text encoder can encode text using Base64, MD5, SHA-1 encoding or create QR Code Online from text with no hassle. The base32 string to decode. hexExtend: pass true to use the hex. When specified, optional split causes the output string to be divided into clusters of that size separated by hyphens. Download the file for your platform. Base32 Encoding Tool Online Free. Using the examples at the bottom, I hacked up this base32 class. Base32 Formats. Created for developers by developers from team Browserling. If you wanted even more security, you can use two passphrases to create a keyed Vigenere cipher, just like the one that stumped cryptologists for years. --- DvDmanDT <[EMAIL PROTECTED]> wrote: > I've never even heard of base32. 'RFC4648' - Base32 from RFC4648 'RFC4648-HEX' - base32hex from RFC4648 'Crockford' - Crockford's Base32; Options may have a padding property which provides a way to forcefully enable or disable padding. There are no ads, popups or nonsense, just an ASCII to string converter. I Googled around a bit to figure out how it works, and found this page. reddit thing_ids. Type last 7 digits of your vehicles identification number. Returns a Base64. Apr 05, 2018 · Base32 string to decode. 7: static Base64. This document describes the commonly used base 64, base 32, and base 16 encoding schemes. FreshPorts - new ports, applications. Easy to use and easy to understand. It is a webtool to encoding image to Base64 and to decode Base64 to image if it is possible. The key is understanding how different systems “tick over” like an odometer when they are full. For base32 encoding, Padding at the end of the data is performed using the "=" character. Decoder is a fun and engaging free online game. Base58 is a group of binary-to-text encoding schemes used to represent large integers as alphanumeric text, introduced by Satoshi Nakamoto for use with Bitcoin. If you know that the encoded data was a character string, you can convert it back to a string using the MATLAB ® native2unicode(res) function. Computers store instructions, texts and characters as binary data. It was an enlightening read, but along the way I encountered some unfortunate bits of coding horror that got me wondering about the fastest way to encode and decode geohashes. Wherever an encoding method argument or property exists, the list of valid encodings supported by Chilkat are as follows:. Are there any existing linux/unix tools out there to simply do this? Something along the lines of:-bash-3. In hexadecimal, each digit can be 16. Base32 is primarily used to encode binary data, but Base32 is also able to encode binary text like ASCII. Input data is assumed to be a base32 encoded UTF-8 string. Not a member of Pastebin yet? Sign Up, it unlocks many cool features!. When decoding, the input may contain newlines in addition to the bytes of the formal base32 alphabet. 205 UTL_ENCODE. ZXing Decoder Online. Salesforce Developer Network: Salesforce1 Developer Resources. Base64 encoding and decoding. Base32 encoding and decoding. (Unicode C++) Base64 Encode/Decode a String. Provides hashing functionality for both strings and binary data using SHA1, SHA384, SHA512, MD2, MD5, and HAVAL. We use geohashes all the time at Factual, so one day I got curious and read through the canonical Java implementation to figure out exactly how they work. Find this useful? Enter your email to receive occasional updates for securing PHP code. That package encodes arbitrary bytes. Dec 22, 2015 · Here is a list of tools that can help you with decoding Niantic Project clues and finding Ingress passcodes. base32 online decode function auto update. An online, on-the-fly UTF-8 encoder/decoder. Decode base32_crockford. Please see the Floating point numbers section in the manual for more specific information and limitations. Converts a number into a text representation with the given radix (base). Decode base32 encoded text, as per RFC-4648. Encoding according to rfc4648. Jan 30, 2015 · I was in the process of working on another code sample that was dependent on the ability to decode Base32 strings. Decode(secure. Hexadecimal (base 16) and octal (base 8) are sometimes used in programming, as a short-hand for binary. **/ void base32_encode(const unsigned char *plain, size_t len, unsigned char *coded); /** * Decode the null terminated string pointed to by coded and write * the decoded data into the location pointed to by plain. comparing with base64 encoding, base32 uses a much smaller set of characters which has three main advantages:. I have a base32 string which I need to convert to a byte array. Base32 string: Cleaned-up string (uppercase only, fixed common mistypes like 8 - B, removed characters outside base32 set):. Supports standard Base32 with padding characters (=) per Base32 from RFC 4648. x there is an internal method that will base32 encode a byte array. Decoding stops at the end of the string or at the first occurrence of an equal sign character (=). Load CSV, get a string. は、NEMのアドレスのように、紛らわしくてはいけないものに向いています。なのでBase32が使われているんでしょうね。 Base32の仕組み. Other base 32 variants. EXE headers - analyze portable executable files (. number string Base36 encoding is used for e. eDock Server is a secure document server that provides fast and convenient access to your. The format conforms to RFC 4648#6. ` A string can be converted into a byte array. decode Base62 ist ein Stellenwertsystem zur Basis 62, welches zur Kodierung großer Zahlen mittels ASCII-Zeichen dient. This awesome app let you convert all your music, pictures and video to brand new BASE32 encoding! Source Files. Using Azure AD Device Code Flow with PowerShell You might have to do some Base32 Encoding or Decoding in C#. Latest News. The base32 string to decode. Now, you do not need to find the encryption string from the Internet or self designed script. His encoding is also case insensitive. The alternate "base32hex" encoding is used in DNSSEC. Comments on bad style are welcome. Base64 Encode/Decode a String; Create PKCS7 Signed File (. And I had to implement Base 64 encoding by myself. See http://tools. Optional altchars must be a string of at least length 2 (additional characters are ignored) which specifies the alternative alphabet used instead of the '+' and '/' characters.