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crypto.md5: improve performance of md5.blockblock_generic

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Delyan Angelov
2022-05-30 21:56:39 +03:00
parent 0f3b2c2ae7
commit fc64f09f0b
3 changed files with 50 additions and 43 deletions
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42
vlib/crypto/md5/md5block_generic.v
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@ -9,8 +9,14 @@
module md5
import math.bits
import encoding.binary
[direct_array_access; inline]
fn get_le_u32(b []u8, start int) u32 {
return u32(b[start]) | (u32(b[1 + start]) << u32(8)) | (u32(b[2 + start]) << u32(16)) | (u32(b[
3 + start]) << u32(24))
}
[direct_array_access]
fn block_generic(mut dig Digest, p []u8) {
// load state
mut a := dig.s[0]
@ -19,8 +25,6 @@ fn block_generic(mut dig Digest, p []u8) {
mut d := dig.s[3]
for i := 0; i <= p.len - block_size; i += block_size {
mut q := p[i..]
q = q[..block_size]
// save current state
aa := a
bb := b
@ -28,22 +32,22 @@ fn block_generic(mut dig Digest, p []u8) {
dd := d
// load input block
x0 := binary.little_endian_u32(q[4 * 0x0..])
x1 := binary.little_endian_u32(q[4 * 0x1..])
x2 := binary.little_endian_u32(q[4 * 0x2..])
x3 := binary.little_endian_u32(q[4 * 0x3..])
x4 := binary.little_endian_u32(q[4 * 0x4..])
x5 := binary.little_endian_u32(q[4 * 0x5..])
x6 := binary.little_endian_u32(q[4 * 0x6..])
x7 := binary.little_endian_u32(q[4 * 0x7..])
x8 := binary.little_endian_u32(q[4 * 0x8..])
x9 := binary.little_endian_u32(q[4 * 0x9..])
xa := binary.little_endian_u32(q[4 * 0xa..])
xb := binary.little_endian_u32(q[4 * 0xb..])
xc := binary.little_endian_u32(q[4 * 0xc..])
xd := binary.little_endian_u32(q[4 * 0xd..])
xe := binary.little_endian_u32(q[4 * 0xe..])
xf := binary.little_endian_u32(q[4 * 0xf..])
x0 := get_le_u32(p, 4 * 0x0 + i)
x1 := get_le_u32(p, 4 * 0x1 + i)
x2 := get_le_u32(p, 4 * 0x2 + i)
x3 := get_le_u32(p, 4 * 0x3 + i)
x4 := get_le_u32(p, 4 * 0x4 + i)
x5 := get_le_u32(p, 4 * 0x5 + i)
x6 := get_le_u32(p, 4 * 0x6 + i)
x7 := get_le_u32(p, 4 * 0x7 + i)
x8 := get_le_u32(p, 4 * 0x8 + i)
x9 := get_le_u32(p, 4 * 0x9 + i)
xa := get_le_u32(p, 4 * 0xa + i)
xb := get_le_u32(p, 4 * 0xb + i)
xc := get_le_u32(p, 4 * 0xc + i)
xd := get_le_u32(p, 4 * 0xd + i)
xe := get_le_u32(p, 4 * 0xe + i)
xf := get_le_u32(p, 4 * 0xf + i)
// round 1
a = b + bits.rotate_left_32((((c ^ d) & b) ^ d) + a + x0 + u32(0xd76aa478), 7)