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/*
`BLAKE2b` hash algorithm.
See:
- [[ https://datatracker.ietf.org/doc/html/rfc7693 ]]
- [[ https://www.blake2.net ]]
*/
package blake2b
/*
Copyright 2021 zhibog
Made available under Odin's license.
List of contributors:
zhibog, dotbmp: Initial implementation.
*/
import "../_blake2"
// DIGEST_SIZE is the BLAKE2b digest size in bytes.
DIGEST_SIZE :: _blake2.BLAKE2B_SIZE
// BLOCK_SIZE is the BLAKE2b block size in bytes.
BLOCK_SIZE :: _blake2.BLAKE2B_BLOCK_SIZE
// Context is a BLAKE2b instance.
Context :: _blake2.Blake2b_Context
// init initializes a Context with the default BLAKE2b config.
init :: proc(ctx: ^Context, digest_size := DIGEST_SIZE) {
ensure(digest_size <= _blake2.MAX_SIZE, "crypto/blake2b: invalid digest size")
cfg: _blake2.Blake2_Config
cfg.size = u8(digest_size)
_blake2.init(ctx, &cfg)
}
// update adds more data to the Context.
update :: proc(ctx: ^Context, data: []byte) {
_blake2.update(ctx, data)
}
// final finalizes the Context, writes the digest to hash, and calls
// reset on the Context.
//
// Iff finalize_clone is set, final will work on a copy of the Context,
// which is useful for for calculating rolling digests.
final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
_blake2.final(ctx, hash, finalize_clone)
}
// clone clones the Context other into ctx.
clone :: proc(ctx, other: ^Context) {
_blake2.clone(ctx, other)
}
// reset sanitizes the Context. The Context must be re-initialized to
// be used again.
reset :: proc(ctx: ^Context) {
_blake2.reset(ctx)
}
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