Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 300 insertions, 0 deletions

diff --git a/vendor/sha-1-0.8.2/src/utils.rs b/vendor/sha-1-0.8.2/src/utils.rs
new file mode 100644
index 000000000..e8b941a6e
--- /dev/null
+++ b/vendor/sha-1-0.8.2/src/utils.rs
@@ -0,0 +1,300 @@
+#![cfg_attr(feature = "cargo-clippy", allow(many_single_char_names))]
+
+use consts::{BLOCK_LEN, K0, K1, K2, K3};
+use block_buffer::byteorder::{BE, ByteOrder};
+use simd::u32x4;
+use digest::generic_array::GenericArray;
+use digest::generic_array::typenum::U64;
+
+type Block = GenericArray<u8, U64>;
+
+/// Not an intrinsic, but gets the first element of a vector.
+#[inline]
+pub fn sha1_first(w0: u32x4) -> u32 {
+    w0.0
+}
+
+/// Not an intrinsic, but adds a word to the first element of a vector.
+#[inline]
+pub fn sha1_first_add(e: u32, w0: u32x4) -> u32x4 {
+    let u32x4(a, b, c, d) = w0;
+    u32x4(e.wrapping_add(a), b, c, d)
+}
+
+/// Emulates `llvm.x86.sha1msg1` intrinsic.
+fn sha1msg1(a: u32x4, b: u32x4) -> u32x4 {
+    let u32x4(_, _, w2, w3) = a;
+    let u32x4(w4, w5, _, _) = b;
+    a ^ u32x4(w2, w3, w4, w5)
+}
+
+/// Emulates `llvm.x86.sha1msg2` intrinsic.
+fn sha1msg2(a: u32x4, b: u32x4) -> u32x4 {
+    let u32x4(x0, x1, x2, x3) = a;
+    let u32x4(_, w13, w14, w15) = b;
+
+    let w16 = (x0 ^ w13).rotate_left(1);
+    let w17 = (x1 ^ w14).rotate_left(1);
+    let w18 = (x2 ^ w15).rotate_left(1);
+    let w19 = (x3 ^ w16).rotate_left(1);
+
+    u32x4(w16, w17, w18, w19)
+}
+
+/// Performs 4 rounds of the message schedule update.
+/*
+pub fn sha1_schedule_x4(v0: u32x4, v1: u32x4, v2: u32x4, v3: u32x4) -> u32x4 {
+    sha1msg2(sha1msg1(v0, v1) ^ v2, v3)
+}
+*/
+
+/// Emulates `llvm.x86.sha1nexte` intrinsic.
+#[inline]
+fn sha1_first_half(abcd: u32x4, msg: u32x4) -> u32x4 {
+    sha1_first_add(sha1_first(abcd).rotate_left(30), msg)
+}
+
+/// Emulates `llvm.x86.sha1rnds4` intrinsic.
+/// Performs 4 rounds of the message block digest.
+fn sha1_digest_round_x4(abcd: u32x4, work: u32x4, i: i8) -> u32x4 {
+    const K0V: u32x4 = u32x4(K0, K0, K0, K0);
+    const K1V: u32x4 = u32x4(K1, K1, K1, K1);
+    const K2V: u32x4 = u32x4(K2, K2, K2, K2);
+    const K3V: u32x4 = u32x4(K3, K3, K3, K3);
+
+    match i {
+        0 => sha1rnds4c(abcd, work + K0V),
+        1 => sha1rnds4p(abcd, work + K1V),
+        2 => sha1rnds4m(abcd, work + K2V),
+        3 => sha1rnds4p(abcd, work + K3V),
+        _ => unreachable!("unknown icosaround index"),
+    }
+}
+
+/// Not an intrinsic, but helps emulate `llvm.x86.sha1rnds4` intrinsic.
+fn sha1rnds4c(abcd: u32x4, msg: u32x4) -> u32x4 {
+    let u32x4(mut a, mut b, mut c, mut d) = abcd;
+    let u32x4(t, u, v, w) = msg;
+    let mut e = 0u32;
+
+    macro_rules! bool3ary_202 {
+        ($a:expr, $b:expr, $c:expr) => ($c ^ ($a & ($b ^ $c)))
+    } // Choose, MD5F, SHA1C
+
+    e = e.wrapping_add(a.rotate_left(5))
+        .wrapping_add(bool3ary_202!(b, c, d))
+        .wrapping_add(t);
+    b = b.rotate_left(30);
+
+    d = d.wrapping_add(e.rotate_left(5))
+        .wrapping_add(bool3ary_202!(a, b, c))
+        .wrapping_add(u);
+    a = a.rotate_left(30);
+
+    c = c.wrapping_add(d.rotate_left(5))
+        .wrapping_add(bool3ary_202!(e, a, b))
+        .wrapping_add(v);
+    e = e.rotate_left(30);
+
+    b = b.wrapping_add(c.rotate_left(5))
+        .wrapping_add(bool3ary_202!(d, e, a))
+        .wrapping_add(w);
+    d = d.rotate_left(30);
+
+    u32x4(b, c, d, e)
+}
+
+/// Not an intrinsic, but helps emulate `llvm.x86.sha1rnds4` intrinsic.
+fn sha1rnds4p(abcd: u32x4, msg: u32x4) -> u32x4 {
+    let u32x4(mut a, mut b, mut c, mut d) = abcd;
+    let u32x4(t, u, v, w) = msg;
+    let mut e = 0u32;
+
+    macro_rules! bool3ary_150 {
+        ($a:expr, $b:expr, $c:expr) => ($a ^ $b ^ $c)
+    } // Parity, XOR, MD5H, SHA1P
+
+    e = e.wrapping_add(a.rotate_left(5))
+        .wrapping_add(bool3ary_150!(b, c, d))
+        .wrapping_add(t);
+    b = b.rotate_left(30);
+
+    d = d.wrapping_add(e.rotate_left(5))
+        .wrapping_add(bool3ary_150!(a, b, c))
+        .wrapping_add(u);
+    a = a.rotate_left(30);
+
+    c = c.wrapping_add(d.rotate_left(5))
+        .wrapping_add(bool3ary_150!(e, a, b))
+        .wrapping_add(v);
+    e = e.rotate_left(30);
+
+    b = b.wrapping_add(c.rotate_left(5))
+        .wrapping_add(bool3ary_150!(d, e, a))
+        .wrapping_add(w);
+    d = d.rotate_left(30);
+
+    u32x4(b, c, d, e)
+}
+
+/// Not an intrinsic, but helps emulate `llvm.x86.sha1rnds4` intrinsic.
+fn sha1rnds4m(abcd: u32x4, msg: u32x4) -> u32x4 {
+    let u32x4(mut a, mut b, mut c, mut d) = abcd;
+    let u32x4(t, u, v, w) = msg;
+    let mut e = 0u32;
+
+    macro_rules! bool3ary_232 {
+        ($a:expr, $b:expr, $c:expr) => (($a & $b) ^ ($a & $c) ^ ($b & $c))
+    } // Majority, SHA1M
+
+    e = e.wrapping_add(a.rotate_left(5))
+        .wrapping_add(bool3ary_232!(b, c, d))
+        .wrapping_add(t);
+    b = b.rotate_left(30);
+
+    d = d.wrapping_add(e.rotate_left(5))
+        .wrapping_add(bool3ary_232!(a, b, c))
+        .wrapping_add(u);
+    a = a.rotate_left(30);
+
+    c = c.wrapping_add(d.rotate_left(5))
+        .wrapping_add(bool3ary_232!(e, a, b))
+        .wrapping_add(v);
+    e = e.rotate_left(30);
+
+    b = b.wrapping_add(c.rotate_left(5))
+        .wrapping_add(bool3ary_232!(d, e, a))
+        .wrapping_add(w);
+    d = d.rotate_left(30);
+
+    u32x4(b, c, d, e)
+}
+
+/// Process a block with the SHA-1 algorithm.
+fn sha1_digest_block_u32(state: &mut [u32; 5], block: &[u32; 16]) {
+
+    macro_rules! schedule {
+        ($v0:expr, $v1:expr, $v2:expr, $v3:expr) => (
+            sha1msg2(sha1msg1($v0, $v1) ^ $v2, $v3)
+        )
+    }
+
+    macro_rules! rounds4 {
+        ($h0:ident, $h1:ident, $wk:expr, $i:expr) => (
+            sha1_digest_round_x4($h0, sha1_first_half($h1, $wk), $i)
+        )
+    }
+
+    // Rounds 0..20
+    // TODO: replace with `u32x4::load`
+    let mut h0 = u32x4(state[0], state[1], state[2], state[3]);
+    let mut w0 = u32x4(block[0], block[1], block[2], block[3]);
+    let mut h1 = sha1_digest_round_x4(h0, sha1_first_add(state[4], w0), 0);
+    let mut w1 = u32x4(block[4], block[5], block[6], block[7]);
+    h0 = rounds4!(h1, h0, w1, 0);
+    let mut w2 = u32x4(block[8], block[9], block[10], block[11]);
+    h1 = rounds4!(h0, h1, w2, 0);
+    let mut w3 = u32x4(block[12], block[13], block[14], block[15]);
+    h0 = rounds4!(h1, h0, w3, 0);
+    let mut w4 = schedule!(w0, w1, w2, w3);
+    h1 = rounds4!(h0, h1, w4, 0);
+
+    // Rounds 20..40
+    w0 = schedule!(w1, w2, w3, w4);
+    h0 = rounds4!(h1, h0, w0, 1);
+    w1 = schedule!(w2, w3, w4, w0);
+    h1 = rounds4!(h0, h1, w1, 1);
+    w2 = schedule!(w3, w4, w0, w1);
+    h0 = rounds4!(h1, h0, w2, 1);
+    w3 = schedule!(w4, w0, w1, w2);
+    h1 = rounds4!(h0, h1, w3, 1);
+    w4 = schedule!(w0, w1, w2, w3);
+    h0 = rounds4!(h1, h0, w4, 1);
+
+    // Rounds 40..60
+    w0 = schedule!(w1, w2, w3, w4);
+    h1 = rounds4!(h0, h1, w0, 2);
+    w1 = schedule!(w2, w3, w4, w0);
+    h0 = rounds4!(h1, h0, w1, 2);
+    w2 = schedule!(w3, w4, w0, w1);
+    h1 = rounds4!(h0, h1, w2, 2);
+    w3 = schedule!(w4, w0, w1, w2);
+    h0 = rounds4!(h1, h0, w3, 2);
+    w4 = schedule!(w0, w1, w2, w3);
+    h1 = rounds4!(h0, h1, w4, 2);
+
+    // Rounds 60..80
+    w0 = schedule!(w1, w2, w3, w4);
+    h0 = rounds4!(h1, h0, w0, 3);
+    w1 = schedule!(w2, w3, w4, w0);
+    h1 = rounds4!(h0, h1, w1, 3);
+    w2 = schedule!(w3, w4, w0, w1);
+    h0 = rounds4!(h1, h0, w2, 3);
+    w3 = schedule!(w4, w0, w1, w2);
+    h1 = rounds4!(h0, h1, w3, 3);
+    w4 = schedule!(w0, w1, w2, w3);
+    h0 = rounds4!(h1, h0, w4, 3);
+
+    let e = sha1_first(h1).rotate_left(30);
+    let u32x4(a, b, c, d) = h0;
+
+    state[0] = state[0].wrapping_add(a);
+    state[1] = state[1].wrapping_add(b);
+    state[2] = state[2].wrapping_add(c);
+    state[3] = state[3].wrapping_add(d);
+    state[4] = state[4].wrapping_add(e);
+}
+
+/// Process a block with the SHA-1 algorithm. (See more...)
+///
+/// SHA-1 is a cryptographic hash function, and as such, it operates
+/// on an arbitrary number of bytes. This function operates on a fixed
+/// number of bytes. If you call this function with anything other than
+/// 64 bytes, then it will panic! This function takes two arguments:
+///
+/// * `state` is reference to an **array** of 5 words.
+/// * `block` is reference to a **slice** of 64 bytes.
+///
+/// If you want the function that performs a message digest on an arbitrary
+/// number of bytes, then see also the `Sha1` struct above.
+///
+/// # Implementation
+///
+/// First, some background. Both ARM and Intel are releasing documentation
+/// that they plan to include instruction set extensions for SHA1 and SHA256
+/// sometime in the near future. Second, LLVM won't lower these intrinsics yet,
+/// so these functions were written emulate these instructions. Finally,
+/// the block function implemented with these emulated intrinsics turned out
+/// to be quite fast! What follows is a discussion of this CPU-level view
+/// of the SHA-1 algorithm and how it relates to the mathematical definition.
+///
+/// The SHA instruction set extensions can be divided up into two categories:
+///
+/// * message work schedule update calculation ("schedule" v., "work" n.)
+/// * message block 80-round digest calculation ("digest" v., "block" n.)
+///
+/// The schedule-related functions can be used to easily perform 4 rounds
+/// of the message work schedule update calculation, as shown below:
+///
+/// ```ignore
+/// macro_rules! schedule_x4 {
+///     ($v0:expr, $v1:expr, $v2:expr, $v3:expr) => (
+///         sha1msg2(sha1msg1($v0, $v1) ^ $v2, $v3)
+///     )
+/// }
+///
+/// macro_rules! round_x4 {
+///     ($h0:ident, $h1:ident, $wk:expr, $i:expr) => (
+///         sha1rnds4($h0, sha1_first_half($h1, $wk), $i)
+///     )
+/// }
+/// ```
+///
+/// and also shown above is how the digest-related functions can be used to
+/// perform 4 rounds of the message block digest calculation.
+///
+pub fn compress(state: &mut [u32; 5], block: &Block) {
+    let mut block_u32 = [0u32; BLOCK_LEN];
+    BE::read_u32_into(block, &mut block_u32[..]);
+    sha1_digest_block_u32(state, &block_u32);
+}