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Base64 Password Encoding

Nov 14, 2018

When used for HTTP password authentication

Result

From RFC-2045 The 64 Chararcter Alphabet For This Method

    Value Encoding  Value Encoding  Value Encoding  Value Encoding
        0 A            16 Q            32 g            48 w
        1 B            17 R            33 h            49 x
        2 C            18 S            34 i            50 y 
        3 D            19 T            35 j            51 z
        4 E            20 U            36 k            52 0 
        5 F            21 V            37 l            53 1
        6 G            22 W            38 m            54 2
        7 H            23 X            39 n            55 3
        8 I            24 Y            40 o            56 4
        9 J            25 Z            41 p            57 5
       10 K            26 a            42 q            58 6
       11 L            27 b            43 r            59 7
       12 M            28 c            44 s            60 8
       13 N            29 d            45 t            61 9
       14 O            30 e            46 u            62 + 
       15 P            31 f            47 v            63 /
       (pad) =

The userid and password are concatenated with a colon as "userid:password" then passed thru the base64 encoder and presented to the server in the http headers. The combination wompas:mypass would appear as:
Authorization: Basic d29tcGFzOm15cGFzcyBIVFRQLzEuMQ==

 

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