' summary
'
' this document describes the md5 message-digest algorithm. the
' algorithm takes as input a message of arbitrary length and produces
' as output a 128-bit "fingerprint" or "message digest" of the input.
' it is conjectured that it is computationally infeasible to produce
' two messages having the same message digest, or to produce any
' message having a given prespecified target message digest. the md5
' algorithm is intended for digital signature applications, where a
' large file must be "compressed" in a secure manner before being
' encrypted with a private (secret) key under a public-key cryptosystem
' such as rsa.
'
' the md5 algorithm is designed to be quite fast on 32-bit machines. in
' addition, the md5 algorithm does not require any large substitution
' tables; the algorithm can be coded quite compactly.
'
' the md5 algorithm is an extension of the md4 message-digest algorithm
' 1,2]. md5 is slightly slower than md4, but is more "conservative" in
' design. md5 was designed because it was felt that md4 was perhaps
' being adopted for use more quickly than justified by the existing
' critical review; because md4 was designed to be exceptionally fast,
' it is "at the edge" in terms of risking successful cryptanalytic
' attack. md5 backs off a bit, giving up a little in speed for a much
' greater likelihood of ultimate security. it incorporates some
' suggestions made by various reviewers, and contains additional
' optimizations. the md5 algorithm is being placed in the public domain
' for review and possible adoption as a standard.
'
' rfc author:
' ronald l.rivest
' massachusetts institute of technology
' laboratory for computer science
' ne43 -324545 technology square
' cambridge, ma 02139-1986
' phone: (617) 253-5880
' email: rivest@ theory.lcs.mit.edu
'
'
'
' change history:
'
' 0.1.0 rmh 1999/12/29 original version
'
'
'=
'= class constants
'=
private const offset_4 = 4294967296#
private const maxint_4 = 2147483647
private const s11 = 7
private const s12 = 12
private const s13 = 17
private const s14 = 22
private const s21 = 5
private const s22 = 9
private const s23 = 14
private const s24 = 20
private const s31 = 4
private const s32 = 11
private const s33 = 16
private const s34 = 23
private const s41 = 6
private const s42 = 10
private const s43 = 15
private const s44 = 21
'=
'= class variables
'=
private state(4) as long
private bytecounter as long
private bytebuffer(63) as byte
'=
'= class properties
'=
property get registera() as string
registera = state(1)
end property
property get registerb() as string
registerb = state(2)
end property
property get registerc() as string
registerc = state(3)
end property
property get registerd() as string
registerd = state(4)
end property
'=
'= class functions
'=
'
' function to quickly digest a file into a hex string
'
