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define std.crypto.sha2.Sha512224 #19697

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merged 4 commits into from
Apr 19, 2024
Merged

define std.crypto.sha2.Sha512224 #19697

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b1c593f
define std.crypto.sha2.Sha512224
nektro Apr 19, 2024
724f0b0
rename blunder
nektro Apr 19, 2024
7b0e08c
add sha512-224 and sha512-256 tests
nektro Apr 19, 2024
3dfca36
fix Sha2x64 for variations that aren't a multiple of 64 bits
nektro Apr 19, 2024
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45 changes: 45 additions & 0 deletions lib/std/crypto/sha2.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -533,6 +533,18 @@ const Sha512Params = Sha2Params64{
.digest_bits = 512,
};

const Sha512224Params = Sha2Params64{
.iv0 = 0x8C3D37C819544DA2,
.iv1 = 0x73E1996689DCD4D6,
.iv2 = 0x1DFAB7AE32FF9C82,
.iv3 = 0x679DD514582F9FCF,
.iv4 = 0x0F6D2B697BD44DA8,
.iv5 = 0x77E36F7304C48942,
.iv6 = 0x3F9D85A86A1D36C8,
.iv7 = 0x1112E6AD91D692A1,
.digest_bits = 224,
};

const Sha512256Params = Sha2Params64{
.iv0 = 0x22312194FC2BF72C,
.iv1 = 0x9F555FA3C84C64C2,
Expand Down Expand Up @@ -563,6 +575,9 @@ pub const Sha384 = Sha2x64(Sha384Params);
/// SHA-512
pub const Sha512 = Sha2x64(Sha512Params);

/// SHA-512/224
pub const Sha512224 = Sha2x64(Sha512224Params);

/// SHA-512/256
pub const Sha512256 = Sha2x64(Sha512256Params);

Expand Down Expand Up @@ -665,6 +680,14 @@ fn Sha2x64(comptime params: Sha2Params64) type {
for (rr, 0..) |s, j| {
mem.writeInt(u64, out[8 * j ..][0..8], s, .big);
}

const bytes_left = params.digest_bits / 8 % 8;
if (bytes_left > 0) {
const rest = d.s[(params.digest_bits / 64)];
var buf: [8]u8 = undefined;
std.mem.writeInt(u64, &buf, rest, .big);
@memcpy(out[params.digest_bits / 64 * 8 ..], buf[0..bytes_left]);
}
}

pub fn finalResult(d: *Self) [digest_length]u8 {
Expand Down Expand Up @@ -875,3 +898,25 @@ test "sha512 aligned final" {
h.update(&block);
h.final(out[0..]);
}

test "sha512-224 single" {
const h1 = "6ed0dd02806fa89e25de060c19d3ac86cabb87d6a0ddd05c333b84f4";
try htest.assertEqualHash(Sha512224, h1, "");

const h2 = "4634270f707b6a54daae7530460842e20e37ed265ceee9a43e8924aa";
try htest.assertEqualHash(Sha512224, h2, "abc");

const h3 = "23fec5bb94d60b23308192640b0c453335d664734fe40e7268674af9";
try htest.assertEqualHash(Sha512224, h3, "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu");
}

test "sha512-256 single" {
const h1 = "c672b8d1ef56ed28ab87c3622c5114069bdd3ad7b8f9737498d0c01ecef0967a";
try htest.assertEqualHash(Sha512256, h1, "");

const h2 = "53048e2681941ef99b2e29b76b4c7dabe4c2d0c634fc6d46e0e2f13107e7af23";
try htest.assertEqualHash(Sha512256, h2, "abc");

const h3 = "3928e184fb8690f840da3988121d31be65cb9d3ef83ee6146feac861e19b563a";
try htest.assertEqualHash(Sha512256, h3, "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu");
}