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Merge pull request #1480 from kristate/x25519-pubkey-fix 

X25519: Fix createPublicKey signature and add test
master
Marc Tiehuis 2018-09-06 17:23:38 +12:00 committed by GitHub
parent 6632d85e5f 15d30b967a
commit 29923efb95
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 12 additions and 1 deletions
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13
std/crypto/x25519.zig
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@ -4,6 +4,7 @@
const std = @import("../index.zig");
const builtin = @import("builtin");
const fmt = std.fmt;
const Endian = builtin.Endian;
const readInt = std.mem.readInt;
@ -114,7 +115,7 @@ pub const X25519 = struct {
return !zerocmp(u8, out);
}
pub fn createPublicKey(public_key: []const u8, private_key: []const u8) bool {
pub fn createPublicKey(public_key: [] u8, private_key: []const u8) bool {
var base_point = []u8{9} ++ []u8{0} ** 31;
return create(public_key, private_key, base_point);
}
@ -573,6 +574,16 @@ const Fe = struct {
}
};
test "x25519 public key calculation from secret key" {
var sk: [32]u8 = undefined;
var pk_expected: [32]u8 = undefined;
var pk_calculated: [32]u8 = undefined;
try fmt.hexToBytes(sk[0..], "8052030376d47112be7f73ed7a019293dd12ad910b654455798b4667d73de166");
try fmt.hexToBytes(pk_expected[0..], "f1814f0e8ff1043d8a44d25babff3cedcae6c22c3edaa48f857ae70de2baae50");
std.debug.assert(X25519.createPublicKey(pk_calculated[0..], sk));
std.debug.assert(std.mem.eql(u8, pk_calculated, pk_expected));
}
test "x25519 rfc7748 vector1" {
const secret_key = "\xa5\x46\xe3\x6b\xf0\x52\x7c\x9d\x3b\x16\x15\x4b\x82\x46\x5e\xdd\x62\x14\x4c\x0a\xc1\xfc\x5a\x18\x50\x6a\x22\x44\xba\x44\x9a\xc4";
const public_key = "\xe6\xdb\x68\x67\x58\x30\x30\xdb\x35\x94\xc1\xa4\x24\xb1\x5f\x7c\x72\x66\x24\xec\x26\xb3\x35\x3b\x10\xa9\x03\xa6\xd0\xab\x1c\x4c";