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Topic: Base32


  
  Debian -- Details of package libmime-base32-perl in sid
Similar to Base64, Base32 encodes arbitrary (binary) data in ASCII text.
The difference to Base64 is that Base32 encoding is case insensitive.
Base32 is defined in rfc3548 using the characters [A-Z2-7], but this module by default uses [0-9A-V] for compatibility with older versions of MIME::Base32.
packages.debian.org /unstable/perl/libmime-base32-perl   (148 words)

  
  RFC 4648 (rfc4648) - The Base16, Base32, and Base64 Data Encodings
In the base32 alphabet below, where 0 (zero) and 1 (one) are not present, a decoder may interpret 0 as O, and 1 as I or L depending on case.
This encoding should not be regarded as the same as the "base32" encoding and should not be referred to as only "base32".
One property with this alphabet, which the base64 and base32 alphabets lack, is that encoded data maintains its sort order when the encoded data is compared bit-wise.
www.faqs.org /rfcs/rfc4648.html   (3578 words)

  
 RFC 3548 - The Base16, Base32, and Base64 Data Encodings. S. Josefsson, Ed..
RFC 3548 The Base16, Base32, and Base64 Data Encodings July 2003 A 33-character subset of US-ASCII is used, enabling 5 bits to be represented per printable character.
RFC 3548 The Base16, Base32, and Base64 Data Encodings July 2003 The following example of Base64 data is from [4].
RFC 3548 The Base16, Base32, and Base64 Data Encodings July 2003 (perhaps to illustrate some other problem) and accidentally reveals the password because she is unaware that the base encoding does not protect the password.
rfc.sunsite.dk /rfc/rfc3548.html   (2521 words)

  
  Encoding Hashed UIDs: Base64 vs. Hex vs. Base32 - Dev411 Blog
Base32 is the middle ground between the 16 character hex and 64 character Base64 encodings, but does not get included in crypto libraries.
Base32, as defined in IETF RFC 3548, uses the characters A-Z and 2-7.
Since Base32 isn't included in many crypto libraries, an extra encoding is needed, however, creating hashed UIDs only happens once per entry so it seems reasonable.
www.dev411.com /blog/2006/10/02/encoding-hashed-uids-base64-vs-hex-vs-base32   (490 words)

  
 base32 Encoding -- Waterken Inc.
The base32 encoding is designed to represent arbitrary sequences of octets in a form that is suitable for inclusion in a URI or filename.
This binary stream is processed in 5 bit groups, each of which is translated into a single character in the base32 alphabet.
The base32 encoding defined by this specification is derived from the base32 encoding defined by RFC 3548.
www.waterken.com /dev/Enc/base32   (414 words)

  
 [No title]
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.
Josefsson Informational [Page 6] RFC 3548 The Base16, Base32, and Base64 Data Encodings July 2003 A 33-character subset of US-ASCII is used, enabling 5 bits to be represented per printable character.
Illustrations and examples To translate between binary and a base encoding, the input is stored in a structure and the output is extracted.
www.ietf.org /rfc/rfc3548.txt   (2388 words)

  
 [Giagnocavo]Michael::Write() - Base32 in .NET
I haven't seen any.NET Base32 implementations, but various people have expressed interest in having some simpler way to represent binary data (such as an encrypted keycode).
Note that this does not conform to the Base32 standard encoding, but uses it's own set of characters (useful for keycodes, where we don't want to have to differentiate between 0 and O. Thanks to Juan Gabriel for making the code much better :).
So when you generate Base32 from a 5 byte array it will always append "Q" at the end because Q it at index 0.
www.atrevido.net /blog/CommentView.aspx?guid=debdd47c-9d15-4a2f-a796-99b0449aa8af   (284 words)

  
  rfc3548
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 [9] data.
In the base32 alphabet below, where 0 (zero) and 1 (one) is not present, a decoder may interpret 0 as O, and 1 as I or L depending on case.
Josefsson Informational [Page 6] RFC 3548 The Base16, Base32, and Base64 Data Encodings July 2003 A 33-character subset of US-ASCII is used, enabling 5 bits to be represented per printable character.
ietfreport.isoc.org /idref/rfc3548   (2424 words)

  
 Fremnet.net
This class can be used to encode data in MIME Base32 encoding according to the RFC 3548 specification.
Safe (0-9A-HJKMNP-TV-Z) Hex like (0-9A-V) Base32 (spelled without a space) is an alternative to Base64 as a notation for encoding arbitrary byte data using a restricted set of symbols which can be conveniently used by humans and processed by old computer systems which only recognize restricted character sets.
Some earlier implementations of Base32 use a Hex(Hexadecimal) like (0-9A-V) character set, so it stands to reason that you might need to comunicate with some old peice of software at this level.
fremnet.net /article/215/class-base32   (324 words)

  
 [No title]
Design note: the digits used in Base32 are "2" through "7" instead of "0" through "6" in order to avoid digits "0" and "1".
This helps reduce errors for users who are entering a Base32 stream and may misinterpret a "0" for an "O" or a "1" for an "l".
Base32 is quite obviously inspired by the tried-and-true Base64 Content-Transfer-Encoding from MIME.
www.nic.ad.jp /ja/idn/mdnkit/download/documents/mdnkit-2.4-doc/reference/draft/draft-ietf-idn-race-03.txt   (3783 words)

  
 TCLLIB - Tcl Standard Library: base32::core
This package provides generic commands for the construction of full base32 mappings from a basic mapping listing just the codes and associated characters.
This is in essence an internal package to be used by implementors of a base32 en- and decoder.
Please report such in the category base32 of the http://sourceforge.net/tracker/?group_id=12883.
tcllib.sourceforge.net /doc/base32core.html   (285 words)

  
 base32 alphabet rant - rhaaaaa rfc3548
The problem with "A-Z2-7" is that the sort order of a set of binary values is different than the sort order of its base32 equivalent in ascii order.
To end this ordering problem, we're not going to use the base32 alphabet "A-Z2-7" explained in rfc3548, but use the "0-9A-V" alphabet that is explained in for instance rfc2938.
Note that rfc3548 is informational, and that it refers to the origin of this base32 alphabet on a work in progress.
ops.ietf.org /lists/namedroppers/namedroppers.2005/msg01423.html   (278 words)

  
 Base32Encoder
The Base32 encoding is suitable when binary data needs to be transmitted or stored as text, when case insensitivity is needed.
In this case, the markers must not belong to the Base32 alphabet, and the corresponding decoder must be set up to silently ignore these characters.
If non-null start/end of line are used, they must be free of any Base32 characters that would otherwise interfere with the decoding process on the other side of the channel.
www.spaceroots.org /jarmor-doc/org/spaceroots/jarmor/Base32Encoder.html   (486 words)

  
 My OS X Programming Blog
Since base32 uses the letters “O” and “I” which can be confused with zero and one, they are now mapped to the unused digits 8 and 9 instead.
I converted the key generator, signer, and verifier programs to encode keys in base64, signatures in base32, and use plain character strings for secret messages.
So here’s a set of base64 and base32 encoders and decoders I’ve written today (base64util.cc, base64util.h) and their test program (main.cpp).
members.shaw.ca /akochoi/2004/11-07/index.html   (785 words)

  
 FreeBSD software : p5-MIME-Base32 - converters
These encoding methods are specified in RFC 3548 - The Base16, Base32, and Base64 Data Encodings.
The base32 encoding is designed to represent arbitrary sequences of octets in a form that need not be humanly readable.
When friends do great things, it's a pleasure to give a little help : take a look at Music-city.org it's a great project dedicated to artists and music.
www.freebsdsoftware.org /converters/p5-MIME-Base32.html   (81 words)

  
 RFC 4648 - The Base16, Base32, and Base64 Data Encodings
This encoding should not be regarded as the same as the "base32" encoding and should not be referred to as only "base32".
One property with this alphabet, which the base64 and base32 alphabets lack, is that encoded data maintains its sort order when the encoded data is compared bit-wise.
Changes Since RFC 3548 Added the "base32 extended hex alphabet", needed to preserve sort order of encoded data.
www.packetizer.com /rfc/rfc4648   (3728 words)

  
 Base32 - Definition, explanation
Base32 is a derivation of Base64 with the following additional properties:
The resulting character set is all uppercase, which can often be beneficial when using a case-sensitive filesystem.
Base32 Note that this is an alternate Base32 encoding scheme.
www.calsky.com /lexikon/en/txt/b/ba/base32.php   (143 words)

  
 Other People's Technical Stuff
Base32 - Use a 32 character set to encode 5 characters per set.
Due to careful choices as to which 32 characters to use, there is no chance of confusing I, or i for 1, nor O or o for 0.
The most compact of all the encodings though, and simpler than Base32 to encode in, but more complex than Base16.
www.omnifarious.org /~hopper/technical/others.html   (514 words)

  
 xml-dev - RE: [xml-dev] Fwd: RFC 3548 on The Base16, Base32, and Base64 Data Encod
I guess you mean choosing 32768 + 1 Unicode characters, assigning a numeric (digit) value to each of them (usually different from the code point value of the character), expressing a binary block as a sequence of such "digits", and encoding the resulting character string in UTF-16.
Alessandro > >.micah > > -----Original Message----- > From: Simon St.Laurent [mailto:simonstl@simonstl.com] > Sent: Tuesday, July 08, 2003 7:26 PM > To: xml-Dev > Subject: [xml-dev] Fwd: RFC 3548 on The Base16, Base32, and > Base64 Data Encodings > > > Base64 encoding has a new home.
Previous by thread: RE: [xml-dev] Fwd: RFC 3548 on The Base16, Base32, and Base64 Data Encodings
lists.xml.org /archives/xml-dev/200307/msg00411.html   (606 words)

  
 12.12 base64 -- RFC 3548: Base16, Base32, Base64 Data Encodings
-- RFC 3548: Base16, Base32, Base64 Data Encodings
This standard defines the Base16, Base32, and Base64 algorithms for encoding and decoding arbitrary binary strings into text strings that can be safely sent by email, used as parts of URLs, or included as part of an HTTP POST request.
Release 2.4, documentation updated on 30 November 2004.
www.python.org /doc/2.4/lib/module-base64.html   (461 words)

  
 My OS X Programming Blog
Since base32 uses the letters “O” and “I” which can be confused with zero and one, they are now mapped to the unused digits 8 and 9 instead.
I converted the key generator, signer, and verifier programs to encode keys in base64, signatures in base32, and use plain character strings for secret messages.
So here’s a set of base64 and base32 encoders and decoders I’ve written today (base64util.cc, base64util.h) and their test program (main.cpp).
www.sixthhappiness.ca /blog/2004/11-07/index.html   (782 words)

  
 Semacode | Semablog | Some new semacode ideas
I have selected the base32 encoding scheme described by josefsson of the IETF for the semacodes because it's easy to transcribe by humans if necessary, because 32 is a nice number (2^5) and because it's got a lot of data per character (5 bits).
Any semacode that starts with 1 == [b] is assumed to encode a latitude longitude pair with arbitrary significant digits allowing lots and lots of precision if that's needed.
I.e., with 15 base32 digits you have room for 11 digits each for lat and long, and that allows you to address each square millimeter on earth.
semacode.org /weblog/2002/9/4   (500 words)

  
 RFC3548   (Site not responding. Last check: 2007-10-29)
RFC 3548 The Base16, Base32, and Base64 Data Encodings July 2003
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 [9] data.
To translate between binary and a base encoding, the input is stored in a structure and the output is extracted.
rfc.net /rfc3548.html   (2452 words)

  
 Magnet URI Redirect Service   (Site not responding. Last check: 2007-10-29)
This service is for those who wish to link to files on P2P file sharing networks, particularly Gnutella, but can't seem to get magnet URIs to work in their system.
The first part is the URI representing exactly the file, usually a URN Base32 SHA1 of the file, the second part the file name to save as.
You'll need to convert that into a URN Base32 SHA1 to use it with this service.
magnet.pixelcort.com   (352 words)

  
 BASE64 and BASE32 Alphabets
They are formed by taking a block of five octets to form a 40-bit string, which is converted into eight BASE32 characters.
NOTE: The pad character (=) does not have a binary representation in BASE32; it is inserted into the BASE32 text as a placeholder to maintain 40-bit alignment.
When converting to binary, remember to use only 5 bits (e.g., 0x19 = binary 1 1001).
www.garykessler.net /library/base64.html   (235 words)

  
 base32 encode - Pixel2Life Forum
Can't say anything about base32, but i know php has a base64_encode function.
I'm assuming if it did have a base32 one, you would find it on that page.
i already know of base64_encode() base32 would have to be a custom function that someone has written before im asking if anyone knows where i can find it
www.pixel2life.com /forums/index.php?showtopic=23443&mode=linear   (154 words)

  
 Roxen Community: RFC 4648 The Base16, Base32, and Base64 Data Encodings (Standards Track)   (Site not responding. Last check: 2007-10-29)
Base encodings use a specific, reduced alphabet to encode binary data.
Base encoding adds no entropy to the plaintext, but it does increase the amount of plaintext available and provide a signature for cryptanalysis in the form of a characteristic probability distribution.
Added the "base32 extended hex alphabet", needed to preserve sort order of encoded data.
community.roxen.com /developers/idocs/rfc/rfc4648.html   (3525 words)

  
 Class: Base32 (mime decode, base64) - PHP Classes
Class: Base32 (mime decode, base64) - PHP Classes
Encode and decode data with MIME base 32 encoding
For more information send a message to :
www.phpclasses.org /browse/package/3484.html   (136 words)

  
 base32 decoder - Re: Fwd: RFC 3548 on The Base16, Base32, and Base64 Data Encodings
base32 decoder - Re: Fwd: RFC 3548 on The Base16, Base32, and Base64 Data Encodings
Re: Fwd: RFC 3548 on The Base16, Base32, and Base64 Data Encodings
Previous by thread: Fwd: RE: Fwd: RFC 3548 on The Base16, Base32, and Base64 Data Encodings
www.stylusstudio.com /xmldev/200307/post70500.html   (579 words)

  
 How can I get an sha1 hash in base32?
Programming Forum and web based access to our favorite programming groups.
I know how to make a hash(using mhash), but instead of encoded as hex I want it in base32 for use with the bitzi catalog.
Just a hash of the file would result in very different hash values for different codecs, bitrates etc. for the "same" audio data.
www.codecomments.com /message531057.html   (297 words)

  
 CocoaDev: NSDataCategory   (Site not responding. Last check: 2007-10-29)
+ (NSData *) dataWithBase32String:(NSString *)base32; - (NSString *) base32String; // COBS is an encoding that eliminates 0x00.
However canonical Base32 length can be tested before entering the loop.
// A canonical Base32 length modulo 8 cannot be: // 1 (aborts discarding 5 bits at STEP n=0 which produces no byte), // 3 (aborts discarding 7 bits at STEP n=2 which produces no byte), // 6 (aborts discarding 6 bits at STEP n=1 which produces no byte).
www.cocoadev.com /index.pl?NSDataCategory   (714 words)

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