1base32::hex(n) Base32 encoding base32::hex(n)
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8 base32::hex - base32 extended hex encoding
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11 package require Tcl 8.4
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13 package require base32::core ?0.1?
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15 package require base32::hex ?0.1?
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17 ::base32::hex::encode string
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19 ::base32::hex::decode estring
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24 This package provides commands for encoding and decoding of strings
25 into and out of the extended hex base32 encoding as specified in the
26 RFC 3548bis draft.
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29 ::base32::hex::encode string
30 This command encodes the given string in extended hex base32 and
31 returns the encoded string as its result. The result may be
32 padded with the character = to signal a partial encoding at the
33 end of the input string.
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35 ::base32::hex::decode estring
36 This commands takes the estring and decodes it under the assump‐
37 tion that it is a valid extended hex base32 encoded string. The
38 result of the decoding is returned as the result of the command.
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40 Note that while the encoder will generate only uppercase charac‐
41 ters this decoder accepts input in lowercase as well.
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43 The command will always throw an error whenever encountering
44 conditions which signal some type of bogus input, namely if
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46 [1] the input contains characters which are not valid output
47 of a extended hex base32 encoder,
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49 [2] the length of the input is not a multiple of eight,
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51 [3] padding appears not at the end of input, but in the mid‐
52 dle,
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54 [4] the padding has not of length six, four, three, or one
55 characters,
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58 The code map used to convert 5-bit sequences is shown below, with the
59 numeric id of the bit sequences to the left and the character used to
60 encode it to the right. The important feature of the extended hex map‐
61 ping is that the first 16 codes map to the digits and hex characters.
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63 0 0 9 9 18 I 27 R
64 1 1 10 A 19 J 28 S
65 2 2 11 B 20 K 29 T
66 3 3 12 C 21 L 30 U
67 4 4 13 D 22 M 31 V
68 5 5 14 E 23 N
69 6 6 15 F 24 O
70 7 7 16 G 25 P
71 8 8 17 H 26 Q
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75 base32, hex, rfc3548
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78 Copyright (c) Public domain
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83base32 0.1 base32::hex(n)