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Topic: Base64


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In the News (Sun 15 Nov 09)

  
  Base64: Encode and Decode Base64 Files
By default, upon encountering a non white space character which does not belong to the base64 set, or discovering the input file is incorrectly padded to a multiple of four characters, base64 issues an error message and terminates processing with exit status 1.
base64 returns status 0 if processing was completed without errors, 1 if an I/O error occurred or errors were detected in decoding a file which indicate it is incorrect or incomplete, and 2 if processing could not be performed at all due, for example, to a nonexistent input file.
This is inherent in the design of base64, which assumes transmission integrity is the responsibility of a higher-level protocol.
www.fourmilab.ch /webtools/base64   (506 words)

  
 Base64 Encoding / Decoding - Webmaster Tools - Webmaster Tools, Developer Tools, Programming Tools
Base64 or quadrosexagesimal is a positional notation using a base of 64.
All well-known variants that are known by the name Base64 use the characters A—Z, a—z, and 0—9 in that order for the first 62 digits but the symbols chosen for the last two digits vary considerably between different systems.
You can use this base64 encoder and decoder to convert source text data from several code pages and encode them to a base64 string or decode base64 strings to a plain text.
tools.devshed.com /webmaster-tools/base64   (697 words)

  
  Base64 - com.Ostermiller.util Java Utilities
Base64 is needed in many places other than its original use as an encoding format for transferring attachments in email.
Base64 scrambles the output and it may appear to be unreadable, but it is easily deciphered by anybody with a little experience or time.
It may be a disservice to your users to use Base64 as obfuscation because it gives them the impression that their data is encrypted when it really isn't.
ostermiller.org /utils/Base64.html   (529 words)

  
  Base64: Definition and Examples
In MIME e-mail base64 is a data encoding scheme whereby an arbitary sequence of bytes is converted to a sequence of printable ASCII characters.
To convert data to base64, the first byte is placed in the most significant eight bits of a 24-bit buffer, the next in the middle eight, and the third in the least significant eight bits.
The main difference it has versus the MIME variant base64 is that it does not use the "=" symbol for padding, as that character tends to require a fair amount of escaping.
www.centricorp.com /papers/base64.htm   (751 words)

  
 [No title]
It gives details of Base64 encoding that is used for encoding of binary attchments in email.
When encoding a bit stream via the base64 encoding, the bit stream must be presumed to be ordered with the most-significant-bit first.
You are to write a Base64 decoder for a web-based email client to be used in BUET server.
acm.uva.es /p/v103/10343.html   (459 words)

  
 Base64
Base64 is a scheme where 3 bytes are concatenated, then split to form 4 groups of 6-bits each; and each 6-bits gets translated to an encoded printable ASCII character, via a table lookup.
Base64 is used, among other things, to encode the user:password string in an Authorization: header for HTTP.
Don't confuse Base64 with x-www-form-urlencoded which is handled by Java.net.URLEncoder.encode/decode If you don't like this code, there is another implementation at http://www.ruffboy.com/download.htm Sun has an undocumented method called sun.misc.Base64Encoder.encode.
www.cic.com /support/guides/iSignSuite/iSign_Java/InkTools/Base64.html   (432 words)

  
 MIME::Base64 - Encoding and decoding of base64 strings
The Base64 encoding is designed to represent arbitrary sequences of octets in a form that need not be humanly readable.
Legal base64 data should be padded with one or two ``='' characters to make its length a multiple of 4.
This ensures that the base64 lines line up and that you do not end up with padding in the middle.
www.xav.com /perl/site/lib/MIME/Base64.html   (454 words)

  
 Man page for base64   (Site not responding. Last check: )
This encoding, defined in RFC 2045, is primarily used to encode binary attachments in MIME e-mail, but is widely used in many other applications as well.
In this mode, it will read from standard input or the supplied file name, ignore all characters that are not part of the base64 alphabet, decode the ones that are, and output the decoded data on standard output.
The base64 encoding converts between a group of three plaintext bytes and a group of four encoded bytes.
www.chiark.greenend.org.uk /~sgtatham/utils/base64.html   (305 words)

  
 Base64
Base64 encoding/decoding implementation as described in section (6.8.) of RFC 2045.
the Base64 translation table; does the same as 'encode()', but this way decoding should be faster.
Decodes Base64 formatted byte array or string into a char array.
www.javazoom.net /jzservlets/download4j/documentation/api/javazoom/download/util/Base64.html   (300 words)

  
 7.11 base64 -- 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.
The legacy interface provides for encoding and decoding to and from file-like objects as well as strings, but only using the Base64 standard alphabet.
Section 5.2, ``Base64 Content-Transfer-Encoding,'' provides the definition of the base64 encoding.
docs.python.org /lib/module-base64.html   (484 words)

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