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155 lines
4.2 KiB
V
155 lines
4.2 KiB
V
// Based on: https://github.com/golang/crypto/blob/master/ripemd160/ripemd160block.go
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// RIPEMD-160 block step.
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module ripemd160
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import math.bits
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// vfmt off
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const n__ = [
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u32(0), 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
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3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
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1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
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4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13,
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]
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const r__ = [
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u32(11), 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
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7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
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11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
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11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
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9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6,
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]
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const n_ = [
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u32(5), 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
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6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
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15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
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8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
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12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11,
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]
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const r_ = [
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u32(8), 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
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9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
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9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
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15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
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8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11,
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]
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// vfmt on
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@[direct_array_access]
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fn block(mut md Digest, p0 []u8) int {
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mut p := p0.clone()
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mut n := 0
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mut x := []u32{len: 16}
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mut alpha := u32(0)
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mut beta := u32(0)
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for p.len >= block_size {
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mut a, mut b, mut c, mut d, mut e := md.s[0], md.s[1], md.s[2], md.s[3], md.s[4]
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mut aa, mut bb, mut cc, mut dd, mut ee := a, b, c, d, e
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mut j := 0
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for i := 0; i < 16; i++ {
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x[i] = u32(p[j]) | u32(p[j + 1]) << 8 | u32(p[j + 2]) << 16 | u32(p[j + 3]) << 24
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j += 4
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}
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mut i := 0
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for i < 16 {
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alpha = a + (b ^ c ^ d) + x[n__[i]]
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mut s := int(r__[i])
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alpha = bits.rotate_left_32(alpha, s) + e
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beta = bits.rotate_left_32(c, 10)
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a, b, c, d, e = e, alpha, b, beta, d
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alpha = aa + (bb ^ (cc | ~dd)) + x[n_[i]] + 0x50a28be6
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s = int(r_[i])
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alpha = bits.rotate_left_32(alpha, s) + ee
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beta = bits.rotate_left_32(cc, 10)
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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for i < 32 {
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alpha = a + (b & c | ~b & d) + x[n__[i]] + 0x5a827999
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mut s := int(r__[i])
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alpha = bits.rotate_left_32(alpha, s) + e
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beta = bits.rotate_left_32(c, 10)
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a, b, c, d, e = e, alpha, b, beta, d
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// parallel line
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alpha = aa + (bb & dd | cc & ~dd) + x[n_[i]] + 0x5c4dd124
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s = int(r_[i])
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alpha = bits.rotate_left_32(alpha, s) + ee
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beta = bits.rotate_left_32(cc, 10)
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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for i < 48 {
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alpha = a + (b | ~c ^ d) + x[n__[i]] + 0x6ed9eba1
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mut s := int(r__[i])
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alpha = bits.rotate_left_32(alpha, s) + e
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beta = bits.rotate_left_32(c, 10)
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a, b, c, d, e = e, alpha, b, beta, d
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// parallel line
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alpha = aa + (bb | ~cc ^ dd) + x[n_[i]] + 0x6d703ef3
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s = int(r_[i])
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alpha = bits.rotate_left_32(alpha, s) + ee
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beta = bits.rotate_left_32(cc, 10)
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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for i < 64 {
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alpha = a + (b & d | c & ~d) + x[n__[i]] + 0x8f1bbcdc
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mut s := int(r__[i])
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alpha = bits.rotate_left_32(alpha, s) + e
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beta = bits.rotate_left_32(c, 10)
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a, b, c, d, e = e, alpha, b, beta, d
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// parallel line
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alpha = aa + (bb & cc | ~bb & dd) + x[n_[i]] + 0x7a6d76e9
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s = int(r_[i])
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alpha = bits.rotate_left_32(alpha, s) + ee
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beta = bits.rotate_left_32(cc, 10)
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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for i < 80 {
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alpha = a + (b ^ (c | ~d)) + x[n__[i]] + 0xa953fd4e
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mut s := int(r__[i])
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alpha = bits.rotate_left_32(alpha, s) + e
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beta = bits.rotate_left_32(c, 10)
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a, b, c, d, e = e, alpha, b, beta, d
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// parallel line
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alpha = aa + (bb ^ cc ^ dd) + x[n_[i]]
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s = int(r_[i])
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alpha = bits.rotate_left_32(alpha, s) + ee
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beta = bits.rotate_left_32(cc, 10)
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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dd += c + md.s[1]
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md.s[1] = md.s[2] + d + ee
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md.s[2] = md.s[3] + e + aa
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md.s[3] = md.s[4] + a + bb
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md.s[4] = md.s[0] + b + cc
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md.s[0] = dd
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p = p[block_size..].clone()
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n += block_size
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}
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return n
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}
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