Pseudo docode MD5 CODE, pseudo docodemd5code

Pseudo docode MD5 CODE, pseudo docodemd5code

//Note: All variables are unsigned 32 bit and wrap modulo 2^32 when calculatingvar int[64] s, K//s specifies the per-round shift amountss[ 0..15] := { 7, 12, 17, 22,  7, 12, 17, 22,  7, 12, 17, 22,  7, 12, 17, 22 }s[16..31] := { 5,  9, 14, 20,  5,  9, 14, 20,  5,  9, 14, 20,  5,  9, 14, 20 }s[32..47] := { 4, 11, 16, 23,  4, 11, 16, 23,  4, 11, 16, 23,  4, 11, 16, 23 }s[48..63] := { 6, 10, 15, 21,  6, 10, 15, 21,  6, 10, 15, 21,  6, 10, 15, 21 }//Use binary integer part of the sines of integers (Radians) as constants:for i from 0 to 63    K[i] := floor(abs(sin(i + 1)) × (2 pow 32))end for//(Or just use the following table):K[ 0.. 3] := { 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee }K[ 4.. 7] := { 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501 }K[ 8..11] := { 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be }K[12..15] := { 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821 }K[16..19] := { 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa }K[20..23] := { 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8 }K[24..27] := { 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed }K[28..31] := { 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a }K[32..35] := { 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c }K[36..39] := { 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70 }K[40..43] := { 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05 }K[44..47] := { 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665 }K[48..51] := { 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039 }K[52..55] := { 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1 }K[56..59] := { 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1 }K[60..63] := { 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391 }//Initialize variables:var int a0 := 0x67452301   //Avar int b0 := 0xefcdab89   //Bvar int c0 := 0x98badcfe   //Cvar int d0 := 0x10325476   //D//Pre-processing: adding a single 1 bitappend "1" bit to message    /* Notice: the input bytes are considered as bits strings,  where the first bit is the most significant bit of the byte.[47]  //Pre-processing: padding with zerosappend "0" bit until message length in bits ≡ 448 (mod 512)append original length in bits mod (2 pow 64) to message//Process the message in successive 512-bit chunks:for each 512-bit chunk of message    break chunk into sixteen 32-bit words M[j], 0 ≤ j ≤ 15//Initialize hash value for this chunk:    var int A := a0    var int B := b0    var int C := c0    var int D := d0//Main loop:    for i from 0 to 63        if 0 ≤ i ≤ 15 then            F := (B and C) or ((not B) and D)            g := i        else if 16 ≤ i ≤ 31            F := (D and B) or ((not D) and C)            g := (5×i + 1) mod 16        else if 32 ≤ i ≤ 47            F := B xor C xor D            g := (3×i + 5) mod 16        else if 48 ≤ i ≤ 63            F := C xor (B or (not D))            g := (7×i) mod 16        dTemp := D        D := C        C := B        B := B + leftrotate((A + F + K[i] + M[g]), s[i])        A := dTemp    end for//Add this chunk's hash to result so far:    a0 := a0 + A    b0 := b0 + B    c0 := c0 + C    d0 := d0 + Dend forvar char digest[16] := a0 append b0 append c0 append d0 //(Output is in little-endian)//leftrotate function definitionleftrotate (x, c)    return (x << c) binary or (x >> (32-c));