Code archives/Algorithms/MD5 Digest
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| This is simply a copy of Craig Kiesau's MD5 function, updated to work with BlitzMax. Enjoy! |
Global MD5_x[]
'MD5 for BlitzMax
'Derived from Craig Kiesau's BlitzBasic MD5 function
'Derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm
Function MD5$(sMessage$)
'Pads the String as per the MD5 standard
nblk = ((Len(sMessage$) + 8) Shr 6) + 1 'number of 16-word blocks
Local MD5_x[(nblk * 16)]
'Zero pad the String
For i = 0 To nblk * 16 - 1
MD5_x[i] = 0
Next
'Convert To array of "words"
For i = 0 To (Len(sMessage$) - 1)
MD5_x[(i Shr 2)] = MD5_x[(i Shr 2)] | (Asc(Mid(sMessage$, (i + 1), 1)) Shl ((i Mod 4) * 8))
Next
MD5_x[(i Shr 2)] = MD5_x[(i Shr 2)] | (128 Shl (((i) Mod 4) * 8))
MD5_x[nblk * 16 - 2] = Len(sMessage$) * 8
'Set initial values
MD5_a = 1732584193 '&H67452301
MD5_b = -271733879 '&HEFCDAB89
MD5_c = -1732584194 '&H98BADCFE
MD5_d = 271733878 '&H10325476
'Loop through the words
For k = 0 To (nblk * 16 - 1) Step 16
MD5_AA = MD5_a
MD5_BB = MD5_b
MD5_CC = MD5_c
MD5_DD = MD5_d
'Round 1
MD5_a = MD5_FF(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 0], 7, -680876936) '&HD76AA478
MD5_d = MD5_FF(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 1], 12, -389564586) '&HE8C7B756
MD5_c = MD5_FF(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 2], 17, 606105819 )'&H242070DB
MD5_b = MD5_FF(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 3], 22, -1044525330) '&HC1BDCEEE
MD5_a = MD5_FF(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 4], 7, -176418897) '&HF57C0FAF
MD5_d = MD5_FF(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 5], 12, 1200080426 )'&H4787C62A
MD5_c = MD5_FF(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 6], 17, -1473231341) '&HA8304613
MD5_b = MD5_FF(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 7], 22, -45705983) '&HFD469501
MD5_a = MD5_FF(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 8], 7, 1770035416) '&H698098D8
MD5_d = MD5_FF(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 9], 12, -1958414417 )'&H8B44F7AF
MD5_c = MD5_FF(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 10], 17, -42063 )'&HFFFF5BB1
MD5_b = MD5_FF(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 11], 22, -1990404162) '&H895CD7BE
MD5_a = MD5_FF(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 12], 7, 1804603682) '&H6B901122
MD5_d = MD5_FF(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 13], 12, -40341101) '&HFD987193
MD5_c = MD5_FF(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 14], 17, -1502002290) '&HA679438E
MD5_b = MD5_FF(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 15], 22, 1236535329) '&H49B40821
'Round 2
MD5_a = MD5_GG(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 1], 5, -165796510) '&HF61E2562
MD5_d = MD5_GG(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 6], 9, -1069501632) '&HC040B340
MD5_c = MD5_GG(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 11], 14, 643717713) '&H265E5A51
MD5_b = MD5_GG(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 0], 20, -373897302) '&HE9B6C7AA
MD5_a = MD5_GG(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 5], 5, -701558691) '&HD62F105D
MD5_d = MD5_GG(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 10], 9, 38016083) '&H2441453
MD5_c = MD5_GG(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 15], 14, -660478335) '&HD8A1E681
MD5_b = MD5_GG(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 4], 20, -405537848) '&HE7D3FBC8
MD5_a = MD5_GG(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 9], 5, 568446438) '&H21E1CDE6
MD5_d = MD5_GG(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 14], 9, -1019803690) '&HC33707D6
MD5_c = MD5_GG(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 3], 14, -187363961) '&HF4D50D87
MD5_b = MD5_GG(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 8], 20, 1163531501) '&H455A14ED
MD5_a = MD5_GG(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 13], 5, -1444681467) '&HA9E3E905
MD5_d = MD5_GG(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 2], 9, -51403784) '&HFCEFA3F8
MD5_c = MD5_GG(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 7], 14, 1735328473) '&H676F02D9
MD5_b = MD5_GG(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 12], 20, -1926607734) '&H8D2A4C8A
'Round 3
MD5_a = MD5_HH(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 5], 4, -378558) '&HFFFA3942
MD5_d = MD5_HH(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 8], 11, -2022574463) '&H8771F681
MD5_c = MD5_HH(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 11], 16, 1839030562) '&H6D9D6122
MD5_b = MD5_HH(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 14], 23, -35309556) '&HFDE5380C
MD5_a = MD5_HH(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 1], 4, -1530992060) '&HA4BEEA44
MD5_d = MD5_HH(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 4], 11, 1272893353) '&H4BDECFA9
MD5_c = MD5_HH(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 7], 16, -155497632) '&HF6BB4B60
MD5_b = MD5_HH(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 10], 23, -1094730640) '&HBEBFBC70
MD5_a = MD5_HH(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 13], 4, 681279174) '&H289B7EC6
MD5_d = MD5_HH(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 0], 11, -358537222) '&HEAA127FA
MD5_c = MD5_HH(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 3], 16, -722521979) '&HD4EF3085
MD5_b = MD5_HH(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 6], 23, 76029189) '&H4881D05
MD5_a = MD5_HH(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 9], 4, -640364487) '&HD9D4D039
MD5_d = MD5_HH(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 12], 11, -421815835) '&HE6DB99E5
MD5_c = MD5_HH(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 15], 16, 530742520) '&H1FA27CF8
MD5_b = MD5_HH(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 2], 23, -995338651) '&HC4AC5665
'Round 4
MD5_a = MD5_II(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 0], 6, -198630844) '&HF4292244
MD5_d = MD5_II(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 7], 10, 1126891415) '&H432AFF97
MD5_c = MD5_II(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 14], 15, -1416354905) '&HAB9423A7
MD5_b = MD5_II(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 5], 21, -57434055) '&HFC93A039
MD5_a = MD5_II(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 12], 6, 1700485571) '&H655B59C3
MD5_d = MD5_II(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 3], 10, -1894986606) '&H8F0CCC92
MD5_c = MD5_II(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 10], 15, -1051523) '&HFFEFF47D
MD5_b = MD5_II(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 1], 21, -2054922799) '&H85845DD1
MD5_a = MD5_II(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 8], 6, 1873313359) '&H6FA87E4F
MD5_d = MD5_II(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 15], 10, -30611744) '&HFE2CE6E0
MD5_c = MD5_II(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 6], 15, -1560198380 )'&HA3014314
MD5_b = MD5_II(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 13], 21, 1309151649) '&H4E0811A1
MD5_a = MD5_II(MD5_a, MD5_b, MD5_c, MD5_d, MD5_x[k + 4], 6, -145523070) '&HF7537E82
MD5_d = MD5_II(MD5_d, MD5_a, MD5_b, MD5_c, MD5_x[k + 11], 10, -1120210379) '&HBD3AF235
MD5_c = MD5_II(MD5_c, MD5_d, MD5_a, MD5_b, MD5_x[k + 2], 15, 718787259) '&H2AD7D2BB
MD5_b = MD5_II(MD5_b, MD5_c, MD5_d, MD5_a, MD5_x[k + 9], 21, -343485551) '&HEB86D391
MD5_a = MD5_a + MD5_AA
MD5_b = MD5_b + MD5_BB
MD5_c = MD5_c + MD5_CC
MD5_d = MD5_d + MD5_DD
Next
Return Upper(WordToHex$(MD5_a) + WordToHex$(MD5_b) + WordToHex$(MD5_c) + WordToHex$(MD5_d))
End Function
Function MD5_F(x, y, z)
Return ((x & y) | (~(x) & z))
End Function
Function MD5_G(x, y, z)
Return ((x & z) | (y & (~(z))))
End Function
Function MD5_H(x, y, z)
Return (x ~ y ~ z)
End Function
Function MD5_I(x, y, z)
Return (y ~ (x | (~z)))
End Function
Function MD5_FF(a, b, c, d, x, s, ac)
a = (a + ((MD5_F(b, c, d)+ x)+ ac))
a = RotateLeft(a, s)
Return a + b
End Function
Function MD5_GG(a, b, c, d, x, s, ac)
a = (a + ((MD5_G(b, c, d) + x) + ac))
a = RotateLeft(a, s)
Return a + b
End Function
Function MD5_HH(a, b, c, d, x, s, ac)
a = (a + ((MD5_H(b, c, d) + x) + ac))
a = RotateLeft(a, s)
Return a + b
End Function
Function MD5_II(a, b, c, d, x, s, ac)
a = (a + ((MD5_I(b, c, d) + x) + ac))
a = RotateLeft(a, s)
Return a + b
End Function
Function RotateLeft(lValue, iShiftBits)
Return (lValue Shl iShiftBits) | (lValue Shr (32 - iShiftBits))
End Function
Function WordToHex$(lValue)
Local returnString$
returnString$ = Hex$(lValue)
Return returnString$[6..8] + returnString$[4..6] + returnString$[2..4] + returnString$[0..2]
End Function |