Commit 444edd9aed
Changed files (3)
std
crypto
std/crypto/chacha20.zig
@@ -0,0 +1,431 @@
+// Based on public domain Supercop by Daniel J. Bernstein
+
+const std = @import("../index.zig");
+const mem = std.mem;
+const endian = std.endian;
+const assert = std.debug.assert;
+const builtin = @import("builtin");
+
+const QuarterRound = struct {
+ a: usize,
+ b: usize,
+ c: usize,
+ d: usize,
+};
+
+fn Rp(a: usize, b: usize, c: usize, d: usize) QuarterRound {
+ return QuarterRound{
+ .a = a,
+ .b = b,
+ .c = c,
+ .d = d,
+ };
+}
+
+fn rotate(a: u32, b: u5) u32 {
+ return ((a << b) |
+ (a >> @intCast(u5, (32 - @intCast(u6, b))))
+ );
+}
+
+// The chacha family of ciphers are based on the salsa family.
+fn salsa20_wordtobyte(input: [16]u32) [64]u8 {
+ var x: [16]u32 = undefined;
+ var out: [64]u8 = undefined;
+
+ for (x) |_, i|
+ x[i] = input[i];
+ const rounds = comptime []QuarterRound{
+ Rp( 0, 4, 8,12),
+ Rp( 1, 5, 9,13),
+ Rp( 2, 6,10,14),
+ Rp( 3, 7,11,15),
+ Rp( 0, 5,10,15),
+ Rp( 1, 6,11,12),
+ Rp( 2, 7, 8,13),
+ Rp( 3, 4, 9,14),
+ };
+ comptime var j: usize = 20;
+ inline while (j > 0) : (j -=2) {
+ for (rounds) |r| {
+ x[r.a] +%= x[r.b]; x[r.d] = rotate(x[r.d] ^ x[r.a], 16);
+ x[r.c] +%= x[r.d]; x[r.b] = rotate(x[r.b] ^ x[r.c], 12);
+ x[r.a] +%= x[r.b]; x[r.d] = rotate(x[r.d] ^ x[r.a], 8);
+ x[r.c] +%= x[r.d]; x[r.b] = rotate(x[r.b] ^ x[r.c], 7);
+ }
+ }
+ for (x) |_, i|
+ x[i] +%= input[i];
+ for (x) |_, i|
+ mem.writeInt(out[4 * i .. 4 * i + 4], x[i], builtin.Endian.Little);
+ return out;
+}
+
+fn chaCha20_internal(out: []u8, in: []const u8, key: [8]u32, counter: [4]u32) void {
+ var ctx: [16]u32 = undefined;
+ var remaining: usize = if (in.len > out.len) in.len else out.len;
+ var cursor: usize = 0;
+
+ const c = "expand 32-byte k";
+ const constant_le = []u32{
+ mem.readIntLE(u32, c[0..4]),
+ mem.readIntLE(u32, c[4..8]),
+ mem.readIntLE(u32, c[8..12]),
+ mem.readIntLE(u32, c[12..16]),
+ };
+
+ mem.copy(u32, ctx[0..], constant_le[0..4]);
+ mem.copy(u32, ctx[4..12], key[0..8]);
+ mem.copy(u32, ctx[12..16], counter[0..4]);
+
+ while (true) {
+ var buf = salsa20_wordtobyte(ctx);
+
+ if (remaining < 64) {
+ var i: usize = 0;
+ while (i < remaining) : (i += 1)
+ out[cursor + i] = in[cursor + i] ^ buf[i];
+ return;
+ }
+
+ comptime var i: usize = 0;
+ inline while (i < 64) : (i += 1)
+ out[cursor + i] = in[cursor + i] ^ buf[i];
+
+ cursor += 64;
+ remaining -= 64;
+
+ ctx[12] += 1;
+ }
+}
+
+/// ChaCha20 avoids the possibility of timing attacks, as there are no branches
+/// on secret key data.
+///
+/// in and out should be the same length.
+/// counter should generally be 0 or 1
+///
+/// ChaCha20 is self-reversing. To decrypt just run the cipher with the same
+/// counter, nonce, and key.
+pub fn chaCha20IETF(out: []u8, in: []const u8, counter: u32, key: [32]u8, nonce: [12]u8) void {
+ assert(in.len >= out.len);
+ assert((in.len >> 6) + counter <= @maxValue(u32));
+
+ var k: [8]u32 = undefined;
+ var c: [4]u32 = undefined;
+
+ k[0] = mem.readIntLE(u32, key[0..4]);
+ k[1] = mem.readIntLE(u32, key[4..8]);
+ k[2] = mem.readIntLE(u32, key[8..12]);
+ k[3] = mem.readIntLE(u32, key[12..16]);
+ k[4] = mem.readIntLE(u32, key[16..20]);
+ k[5] = mem.readIntLE(u32, key[20..24]);
+ k[6] = mem.readIntLE(u32, key[24..28]);
+ k[7] = mem.readIntLE(u32, key[28..32]);
+
+ c[0] = counter;
+ c[1] = mem.readIntLE(u32, nonce[0..4]);
+ c[2] = mem.readIntLE(u32, nonce[4..8]);
+ c[3] = mem.readIntLE(u32, nonce[8..12]);
+ chaCha20_internal(out, in, k, c);
+}
+
+/// This is the original ChaCha20 before RFC 7539, which recommends using the
+/// orgininal version on applications such as disk or file encryption that might
+/// exceed the 256 GiB limit of the 96-bit nonce version.
+pub fn chaCha20With64BitNonce(out: []u8, in: []const u8, counter: u64, key: [32]u8, nonce: [8]u8) void {
+ assert(in.len >= out.len);
+ assert(counter +% (in.len >> 6) >= counter);
+
+ var cursor: u64 = 0;
+ var k: [8]u32 = undefined;
+ var c: [4]u32 = undefined;
+
+ k[0] = mem.readIntLE(u32, key[0..4]);
+ k[1] = mem.readIntLE(u32, key[4..8]);
+ k[2] = mem.readIntLE(u32, key[8..12]);
+ k[3] = mem.readIntLE(u32, key[12..16]);
+ k[4] = mem.readIntLE(u32, key[16..20]);
+ k[5] = mem.readIntLE(u32, key[20..24]);
+ k[6] = mem.readIntLE(u32, key[24..28]);
+ k[7] = mem.readIntLE(u32, key[28..32]);
+
+ c[0] = @truncate(u32, counter);
+ c[1] = @truncate(u32, counter >> 32);
+ c[2] = mem.readIntLE(u32, nonce[0..4]);
+ c[3] = mem.readIntLE(u32, nonce[4..8]);
+
+ const block_size = (1 << 6);
+ const big_block = (block_size << 32);
+
+ // first partial big block
+ if (((@intCast(u64, @maxValue(u32) - @truncate(u32, counter)) + 1) << 6) < in.len) {
+ chaCha20_internal(out[cursor..big_block], in[cursor..big_block], k, c);
+ cursor = big_block - cursor;
+ c[1] += 1;
+ if (comptime @sizeOf(usize) > 4) {
+ // A big block is giant: 256 GiB, but we can avoid this limitation
+ var remaining_blocks: u32 = @intCast(u32, (in.len / big_block));
+ var i: u32 = 0;
+ while (remaining_blocks > 0) : (remaining_blocks -= 1) {
+ chaCha20_internal(out[cursor..cursor + big_block], in[cursor..cursor + big_block], k, c);
+ c[1] += 1; // upper 32-bit of counter, generic chaCha20_internal() doesn't
+ // know about this.
+ cursor += big_block;
+ }
+ }
+ }
+
+ chaCha20_internal(out[cursor..], in[cursor..], k, c);
+}
+
+// https://tools.ietf.org/html/rfc7539#section-2.4.2
+test "crypto.chacha20 test vector sunscreen" {
+ const expected_result = []u8{
+ 0x6e, 0x2e, 0x35, 0x9a, 0x25, 0x68, 0xf9, 0x80,
+ 0x41, 0xba, 0x07, 0x28, 0xdd, 0x0d, 0x69, 0x81,
+ 0xe9, 0x7e, 0x7a, 0xec, 0x1d, 0x43, 0x60, 0xc2,
+ 0x0a, 0x27, 0xaf, 0xcc, 0xfd, 0x9f, 0xae, 0x0b,
+ 0xf9, 0x1b, 0x65, 0xc5, 0x52, 0x47, 0x33, 0xab,
+ 0x8f, 0x59, 0x3d, 0xab, 0xcd, 0x62, 0xb3, 0x57,
+ 0x16, 0x39, 0xd6, 0x24, 0xe6, 0x51, 0x52, 0xab,
+ 0x8f, 0x53, 0x0c, 0x35, 0x9f, 0x08, 0x61, 0xd8,
+ 0x07, 0xca, 0x0d, 0xbf, 0x50, 0x0d, 0x6a, 0x61,
+ 0x56, 0xa3, 0x8e, 0x08, 0x8a, 0x22, 0xb6, 0x5e,
+ 0x52, 0xbc, 0x51, 0x4d, 0x16, 0xcc, 0xf8, 0x06,
+ 0x81, 0x8c, 0xe9, 0x1a, 0xb7, 0x79, 0x37, 0x36,
+ 0x5a, 0xf9, 0x0b, 0xbf, 0x74, 0xa3, 0x5b, 0xe6,
+ 0xb4, 0x0b, 0x8e, 0xed, 0xf2, 0x78, 0x5e, 0x42,
+ 0x87, 0x4d,
+ };
+ const input = "Ladies and Gentlemen of the class of '99: If I could offer you only one tip for the future, sunscreen would be it.";
+ var result: [114]u8 = undefined;
+ const key = []u8{
+ 0, 1, 2, 3, 4, 5, 6, 7,
+ 8, 9,10,11,12,13,14,15,
+ 16,17,18,19,20,21,22,23,
+ 24,25,26,27,28,29,30,31,
+ };
+ const nonce = []u8{
+ 0, 0, 0, 0,
+ 0, 0, 0, 0x4a,
+ 0, 0, 0, 0,
+ };
+
+ chaCha20IETF(result[0..], input[0..], 1, key, nonce);
+ assert(mem.eql(u8, expected_result, result));
+
+ // Chacha20 is self-reversing.
+ var plaintext: [114]u8 = undefined;
+ chaCha20IETF(plaintext[0..], result[0..], 1, key, nonce);
+ assert(mem.compare(u8, input, plaintext) == mem.Compare.Equal);
+}
+
+// https://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-04#section-7
+test "crypto.chacha20 test vector 1" {
+ const expected_result = []u8{
+ 0x76, 0xb8, 0xe0, 0xad, 0xa0, 0xf1, 0x3d, 0x90,
+ 0x40, 0x5d, 0x6a, 0xe5, 0x53, 0x86, 0xbd, 0x28,
+ 0xbd, 0xd2, 0x19, 0xb8, 0xa0, 0x8d, 0xed, 0x1a,
+ 0xa8, 0x36, 0xef, 0xcc, 0x8b, 0x77, 0x0d, 0xc7,
+ 0xda, 0x41, 0x59, 0x7c, 0x51, 0x57, 0x48, 0x8d,
+ 0x77, 0x24, 0xe0, 0x3f, 0xb8, 0xd8, 0x4a, 0x37,
+ 0x6a, 0x43, 0xb8, 0xf4, 0x15, 0x18, 0xa1, 0x1c,
+ 0xc3, 0x87, 0xb6, 0x69, 0xb2, 0xee, 0x65, 0x86,
+ };
+ const input = []u8{
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ };
+ var result: [64]u8 = undefined;
+ const key = []u8{
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ };
+ const nonce = []u8{0, 0, 0, 0, 0, 0, 0, 0};
+
+ chaCha20With64BitNonce(result[0..], input[0..], 0, key, nonce);
+ assert(mem.eql(u8, expected_result, result));
+}
+
+test "crypto.chacha20 test vector 2" {
+ const expected_result = []u8{
+ 0x45, 0x40, 0xf0, 0x5a, 0x9f, 0x1f, 0xb2, 0x96,
+ 0xd7, 0x73, 0x6e, 0x7b, 0x20, 0x8e, 0x3c, 0x96,
+ 0xeb, 0x4f, 0xe1, 0x83, 0x46, 0x88, 0xd2, 0x60,
+ 0x4f, 0x45, 0x09, 0x52, 0xed, 0x43, 0x2d, 0x41,
+ 0xbb, 0xe2, 0xa0, 0xb6, 0xea, 0x75, 0x66, 0xd2,
+ 0xa5, 0xd1, 0xe7, 0xe2, 0x0d, 0x42, 0xaf, 0x2c,
+ 0x53, 0xd7, 0x92, 0xb1, 0xc4, 0x3f, 0xea, 0x81,
+ 0x7e, 0x9a, 0xd2, 0x75, 0xae, 0x54, 0x69, 0x63,
+ };
+ const input = []u8{
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ };
+ var result: [64]u8 = undefined;
+ const key = []u8{
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 1,
+ };
+ const nonce = []u8{0, 0, 0, 0, 0, 0, 0, 0};
+
+ chaCha20With64BitNonce(result[0..], input[0..], 0, key, nonce);
+ assert(mem.eql(u8, expected_result, result));
+}
+
+test "crypto.chacha20 test vector 3" {
+ const expected_result = []u8{
+ 0xde, 0x9c, 0xba, 0x7b, 0xf3, 0xd6, 0x9e, 0xf5,
+ 0xe7, 0x86, 0xdc, 0x63, 0x97, 0x3f, 0x65, 0x3a,
+ 0x0b, 0x49, 0xe0, 0x15, 0xad, 0xbf, 0xf7, 0x13,
+ 0x4f, 0xcb, 0x7d, 0xf1, 0x37, 0x82, 0x10, 0x31,
+ 0xe8, 0x5a, 0x05, 0x02, 0x78, 0xa7, 0x08, 0x45,
+ 0x27, 0x21, 0x4f, 0x73, 0xef, 0xc7, 0xfa, 0x5b,
+ 0x52, 0x77, 0x06, 0x2e, 0xb7, 0xa0, 0x43, 0x3e,
+ 0x44, 0x5f, 0x41, 0xe3,
+ };
+ const input = []u8{
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00,
+ };
+ var result: [60]u8 = undefined;
+ const key = []u8{
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ };
+ const nonce = []u8{0, 0, 0, 0, 0, 0, 0, 1};
+
+ chaCha20With64BitNonce(result[0..], input[0..], 0, key, nonce);
+ assert(mem.eql(u8, expected_result, result));
+}
+
+test "crypto.chacha20 test vector 4" {
+ const expected_result = []u8{
+ 0xef, 0x3f, 0xdf, 0xd6, 0xc6, 0x15, 0x78, 0xfb,
+ 0xf5, 0xcf, 0x35, 0xbd, 0x3d, 0xd3, 0x3b, 0x80,
+ 0x09, 0x63, 0x16, 0x34, 0xd2, 0x1e, 0x42, 0xac,
+ 0x33, 0x96, 0x0b, 0xd1, 0x38, 0xe5, 0x0d, 0x32,
+ 0x11, 0x1e, 0x4c, 0xaf, 0x23, 0x7e, 0xe5, 0x3c,
+ 0xa8, 0xad, 0x64, 0x26, 0x19, 0x4a, 0x88, 0x54,
+ 0x5d, 0xdc, 0x49, 0x7a, 0x0b, 0x46, 0x6e, 0x7d,
+ 0x6b, 0xbd, 0xb0, 0x04, 0x1b, 0x2f, 0x58, 0x6b,
+ };
+ const input = []u8{
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ };
+ var result: [64]u8 = undefined;
+ const key = []u8{
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ };
+ const nonce = []u8{1, 0, 0, 0, 0, 0, 0, 0};
+
+ chaCha20With64BitNonce(result[0..], input[0..], 0, key, nonce);
+ assert(mem.eql(u8, expected_result, result));
+}
+
+test "crypto.chacha20 test vector 5" {
+ const expected_result = []u8{
+ 0xf7, 0x98, 0xa1, 0x89, 0xf1, 0x95, 0xe6, 0x69,
+ 0x82, 0x10, 0x5f, 0xfb, 0x64, 0x0b, 0xb7, 0x75,
+ 0x7f, 0x57, 0x9d, 0xa3, 0x16, 0x02, 0xfc, 0x93,
+ 0xec, 0x01, 0xac, 0x56, 0xf8, 0x5a, 0xc3, 0xc1,
+ 0x34, 0xa4, 0x54, 0x7b, 0x73, 0x3b, 0x46, 0x41,
+ 0x30, 0x42, 0xc9, 0x44, 0x00, 0x49, 0x17, 0x69,
+ 0x05, 0xd3, 0xbe, 0x59, 0xea, 0x1c, 0x53, 0xf1,
+ 0x59, 0x16, 0x15, 0x5c, 0x2b, 0xe8, 0x24, 0x1a,
+
+ 0x38, 0x00, 0x8b, 0x9a, 0x26, 0xbc, 0x35, 0x94,
+ 0x1e, 0x24, 0x44, 0x17, 0x7c, 0x8a, 0xde, 0x66,
+ 0x89, 0xde, 0x95, 0x26, 0x49, 0x86, 0xd9, 0x58,
+ 0x89, 0xfb, 0x60, 0xe8, 0x46, 0x29, 0xc9, 0xbd,
+ 0x9a, 0x5a, 0xcb, 0x1c, 0xc1, 0x18, 0xbe, 0x56,
+ 0x3e, 0xb9, 0xb3, 0xa4, 0xa4, 0x72, 0xf8, 0x2e,
+ 0x09, 0xa7, 0xe7, 0x78, 0x49, 0x2b, 0x56, 0x2e,
+ 0xf7, 0x13, 0x0e, 0x88, 0xdf, 0xe0, 0x31, 0xc7,
+
+ 0x9d, 0xb9, 0xd4, 0xf7, 0xc7, 0xa8, 0x99, 0x15,
+ 0x1b, 0x9a, 0x47, 0x50, 0x32, 0xb6, 0x3f, 0xc3,
+ 0x85, 0x24, 0x5f, 0xe0, 0x54, 0xe3, 0xdd, 0x5a,
+ 0x97, 0xa5, 0xf5, 0x76, 0xfe, 0x06, 0x40, 0x25,
+ 0xd3, 0xce, 0x04, 0x2c, 0x56, 0x6a, 0xb2, 0xc5,
+ 0x07, 0xb1, 0x38, 0xdb, 0x85, 0x3e, 0x3d, 0x69,
+ 0x59, 0x66, 0x09, 0x96, 0x54, 0x6c, 0xc9, 0xc4,
+ 0xa6, 0xea, 0xfd, 0xc7, 0x77, 0xc0, 0x40, 0xd7,
+
+ 0x0e, 0xaf, 0x46, 0xf7, 0x6d, 0xad, 0x39, 0x79,
+ 0xe5, 0xc5, 0x36, 0x0c, 0x33, 0x17, 0x16, 0x6a,
+ 0x1c, 0x89, 0x4c, 0x94, 0xa3, 0x71, 0x87, 0x6a,
+ 0x94, 0xdf, 0x76, 0x28, 0xfe, 0x4e, 0xaa, 0xf2,
+ 0xcc, 0xb2, 0x7d, 0x5a, 0xaa, 0xe0, 0xad, 0x7a,
+ 0xd0, 0xf9, 0xd4, 0xb6, 0xad, 0x3b, 0x54, 0x09,
+ 0x87, 0x46, 0xd4, 0x52, 0x4d, 0x38, 0x40, 0x7a,
+ 0x6d, 0xeb, 0x3a, 0xb7, 0x8f, 0xab, 0x78, 0xc9,
+ };
+ const input = []u8{
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ };
+ var result: [256]u8 = undefined;
+ const key = []u8{
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+ };
+ const nonce = []u8{
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ };
+
+ chaCha20With64BitNonce(result[0..], input[0..], 0, key, nonce);
+ assert(mem.eql(u8, expected_result, result));
+}
std/crypto/index.zig
@@ -24,6 +24,10 @@ pub const HmacMd5 = hmac.HmacMd5;
pub const HmacSha1 = hmac.Sha1;
pub const HmacSha256 = hmac.Sha256;
+const import_chaCha20 = @import("chacha20.zig");
+pub const chaCha20IETF = import_chaCha20.chaCha20IETF;
+pub const chaCha20With64BitNonce = import_chaCha20.chaCha20With64BitNonce;
+
test "crypto" {
_ = @import("md5.zig");
_ = @import("sha1.zig");
@@ -31,4 +35,5 @@ test "crypto" {
_ = @import("sha3.zig");
_ = @import("blake2.zig");
_ = @import("hmac.zig");
+ _ = @import("chacha20.zig");
}
CMakeLists.txt
@@ -451,6 +451,7 @@ set(ZIG_STD_FILES
"crypto/sha1.zig"
"crypto/sha2.zig"
"crypto/sha3.zig"
+ "crypto/chacha20.zig"
"cstr.zig"
"debug/failing_allocator.zig"
"debug/index.zig"