diff options
| -rw-r--r-- | lib/std/crypto/siphash.zig | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/std/crypto/siphash.zig b/lib/std/crypto/siphash.zig index e960a3476b..e527e4558a 100644 --- a/lib/std/crypto/siphash.zig +++ b/lib/std/crypto/siphash.zig @@ -87,6 +87,11 @@ fn SipHashStateless(comptime T: type, comptime c_rounds: usize, comptime d_round self.msg_len +%= @truncate(u8, b.len); } + pub fn peek(self: Self) [digest_length]u8 { + var copy = self; + return copy.finalResult(); + } + pub fn final(self: *Self, b: []const u8) T { std.debug.assert(b.len < 8); @@ -124,6 +129,12 @@ fn SipHashStateless(comptime T: type, comptime c_rounds: usize, comptime d_round return (@as(u128, b2) << 64) | b1; } + pub fn finalResult(self: *Self) [digest_length]u8 { + var result: [digest_length]u8 = undefined; + self.final(&result); + return result; + } + fn round(self: *Self, b: [8]u8) void { const m = mem.readIntLittle(u64, b[0..8]); self.v3 ^= m; @@ -205,12 +216,23 @@ fn SipHash(comptime T: type, comptime c_rounds: usize, comptime d_rounds: usize) self.buf_len += @intCast(u8, b[off + aligned_len ..].len); } + pub fn peek(self: Self) [mac_length]u8 { + var copy = self; + return copy.finalResult(); + } + /// Return an authentication tag for the current state /// Assumes `out` is less than or equal to `mac_length`. pub fn final(self: *Self, out: *[mac_length]u8) void { mem.writeIntLittle(T, out, self.state.final(self.buf[0..self.buf_len])); } + pub fn finalResult(self: *Self) [mac_length]u8 { + var result: [mac_length]u8 = undefined; + self.final(&result); + return result; + } + /// Return an authentication tag for a message and a key pub fn create(out: *[mac_length]u8, msg: []const u8, key: *const [key_length]u8) void { var ctx = Self.init(key); |