mirror of
https://codeberg.org/ziglang/zig.git
synced 2025-12-06 13:54:21 +00:00
d29871977f
We already have a LICENSE file that covers the Zig Standard Library. We no longer need to remind everyone that the license is MIT in every single file. Previously this was introduced to clarify the situation for a fork of Zig that made Zig's LICENSE file harder to find, and replaced it with their own license that required annual payments to their company. However that fork now appears to be dead. So there is no need to reinforce the copyright notice in every single file.
104 lines
3.6 KiB
Zig
104 lines
3.6 KiB
Zig
const std = @import("../std.zig");
|
|
const crypto = std.crypto;
|
|
const debug = std.debug;
|
|
const mem = std.mem;
|
|
|
|
pub const HmacMd5 = Hmac(crypto.hash.Md5);
|
|
pub const HmacSha1 = Hmac(crypto.hash.Sha1);
|
|
|
|
pub const sha2 = struct {
|
|
pub const HmacSha224 = Hmac(crypto.hash.sha2.Sha224);
|
|
pub const HmacSha256 = Hmac(crypto.hash.sha2.Sha256);
|
|
pub const HmacSha384 = Hmac(crypto.hash.sha2.Sha384);
|
|
pub const HmacSha512 = Hmac(crypto.hash.sha2.Sha512);
|
|
};
|
|
|
|
pub fn Hmac(comptime Hash: type) type {
|
|
return struct {
|
|
const Self = @This();
|
|
pub const mac_length = Hash.digest_length;
|
|
pub const key_length_min = 0;
|
|
pub const key_length = 32; // recommended key length
|
|
|
|
o_key_pad: [Hash.block_length]u8,
|
|
hash: Hash,
|
|
|
|
// HMAC(k, m) = H(o_key_pad || H(i_key_pad || msg)) where || is concatenation
|
|
pub fn create(out: *[mac_length]u8, msg: []const u8, key: []const u8) void {
|
|
var ctx = Self.init(key);
|
|
ctx.update(msg);
|
|
ctx.final(out);
|
|
}
|
|
|
|
pub fn init(key: []const u8) Self {
|
|
var ctx: Self = undefined;
|
|
var scratch: [Hash.block_length]u8 = undefined;
|
|
var i_key_pad: [Hash.block_length]u8 = undefined;
|
|
|
|
// Normalize key length to block size of hash
|
|
if (key.len > Hash.block_length) {
|
|
Hash.hash(key, scratch[0..mac_length], .{});
|
|
mem.set(u8, scratch[mac_length..Hash.block_length], 0);
|
|
} else if (key.len < Hash.block_length) {
|
|
mem.copy(u8, scratch[0..key.len], key);
|
|
mem.set(u8, scratch[key.len..Hash.block_length], 0);
|
|
} else {
|
|
mem.copy(u8, scratch[0..], key);
|
|
}
|
|
|
|
for (ctx.o_key_pad) |*b, i| {
|
|
b.* = scratch[i] ^ 0x5c;
|
|
}
|
|
|
|
for (i_key_pad) |*b, i| {
|
|
b.* = scratch[i] ^ 0x36;
|
|
}
|
|
|
|
ctx.hash = Hash.init(.{});
|
|
ctx.hash.update(&i_key_pad);
|
|
return ctx;
|
|
}
|
|
|
|
pub fn update(ctx: *Self, msg: []const u8) void {
|
|
ctx.hash.update(msg);
|
|
}
|
|
|
|
pub fn final(ctx: *Self, out: *[mac_length]u8) void {
|
|
var scratch: [mac_length]u8 = undefined;
|
|
ctx.hash.final(&scratch);
|
|
var ohash = Hash.init(.{});
|
|
ohash.update(&ctx.o_key_pad);
|
|
ohash.update(&scratch);
|
|
ohash.final(out);
|
|
}
|
|
};
|
|
}
|
|
|
|
const htest = @import("test.zig");
|
|
|
|
test "hmac md5" {
|
|
var out: [HmacMd5.mac_length]u8 = undefined;
|
|
HmacMd5.create(out[0..], "", "");
|
|
try htest.assertEqual("74e6f7298a9c2d168935f58c001bad88", out[0..]);
|
|
|
|
HmacMd5.create(out[0..], "The quick brown fox jumps over the lazy dog", "key");
|
|
try htest.assertEqual("80070713463e7749b90c2dc24911e275", out[0..]);
|
|
}
|
|
|
|
test "hmac sha1" {
|
|
var out: [HmacSha1.mac_length]u8 = undefined;
|
|
HmacSha1.create(out[0..], "", "");
|
|
try htest.assertEqual("fbdb1d1b18aa6c08324b7d64b71fb76370690e1d", out[0..]);
|
|
|
|
HmacSha1.create(out[0..], "The quick brown fox jumps over the lazy dog", "key");
|
|
try htest.assertEqual("de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9", out[0..]);
|
|
}
|
|
|
|
test "hmac sha256" {
|
|
var out: [sha2.HmacSha256.mac_length]u8 = undefined;
|
|
sha2.HmacSha256.create(out[0..], "", "");
|
|
try htest.assertEqual("b613679a0814d9ec772f95d778c35fc5ff1697c493715653c6c712144292c5ad", out[0..]);
|
|
|
|
sha2.HmacSha256.create(out[0..], "The quick brown fox jumps over the lazy dog", "key");
|
|
try htest.assertEqual("f7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc2d1a3cd8", out[0..]);
|
|
}
|