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std/crypto: don't constrain Gimli hash output to a fixed length

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As documented in the comment right above the finalization function,
Gimli can be used as a XOF, i.e. the output doesn't have a fixed
length.

So, allow it to be used that way, just like BLAKE3.
This commit is contained in:
Frank Denis 2020-11-02 23:56:26 +01:00 committed by Andrew Kelley
parent 2e354c387e
commit e7b60b219b
1 changed files with 2 additions and 2 deletions
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4
lib/std/crypto/gimli.zig
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@ -250,7 +250,7 @@ pub const Hash = struct {
/// By default, Gimli-Hash provides a fixed-length output of 32 bytes
/// (the concatenation of two 16-byte blocks). However, Gimli-Hash can
/// be used as an “extendable one-way function” (XOF).
pub fn final(self: *Self, out: *[digest_length]u8) void {
pub fn final(self: *Self, out: []u8) void {
const buf = self.state.toSlice();
// XOR 1 into the next byte of the state
@ -262,7 +262,7 @@ pub const Hash = struct {
}
};
pub fn hash(out: *[Hash.digest_length]u8, in: []const u8, options: Hash.Options) void {
pub fn hash(out: []u8, in: []const u8, options: Hash.Options) void {
var st = Hash.init(options);
st.update(in);
st.final(out);