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058bd9a914
The fixes apply to "use it as a MAC" which was not part of the documented/exposed API. It now is, and is covered by the self-test routines from the RFC.
73 lines
1.9 KiB
Odin
73 lines
1.9 KiB
Odin
/*
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`BLAKE2s` hash algorithm.
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See:
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- [[ https://datatracker.ietf.org/doc/html/rfc7693 ]]
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- [[ https://www.blake2.net/ ]]
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*/
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package blake2s
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/*
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Copyright 2021 zhibog
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Made available under Odin's license.
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List of contributors:
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zhibog, dotbmp: Initial implementation.
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*/
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import "../_blake2"
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// DIGEST_SIZE is the BLAKE2s digest size in bytes.
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DIGEST_SIZE :: _blake2.BLAKE2S_SIZE
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// BLOCK_SIZE is the BLAKE2s block size in bytes.
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BLOCK_SIZE :: _blake2.BLAKE2S_BLOCK_SIZE
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// Context is a BLAKE2s instance.
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Context :: _blake2.Blake2s_Context
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// init initializes a Context with the default BLAKE2s config.
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init :: proc(ctx: ^Context, digest_size := DIGEST_SIZE) {
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ensure(digest_size <= DIGEST_SIZE, "crypto/blake2s: invalid digest size")
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cfg: _blake2.Blake2_Config
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cfg.size = u8(digest_size)
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_blake2.init(ctx, &cfg)
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}
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// init_mac initializes a Context with a user provided key.
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init_mac :: proc(ctx: ^Context, key: []byte, digest_size := DIGEST_SIZE) {
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ensure(digest_size <= DIGEST_SIZE, "crypto/blake2s: invalid digest size")
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ensure(len(key) <= DIGEST_SIZE, "crypto/blake2s: invalid key size")
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cfg: _blake2.Blake2_Config
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cfg.size = u8(digest_size)
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cfg.key = key
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_blake2.init(ctx, &cfg)
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}
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// update adds more data to the Context.
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update :: proc(ctx: ^Context, data: []byte) {
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_blake2.update(ctx, data)
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}
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// final finalizes the Context, writes the digest to hash, and calls
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// reset on the Context.
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//
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// Iff finalize_clone is set, final will work on a copy of the Context,
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// which is useful for for calculating rolling digests.
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final :: proc(ctx: ^Context, hash: []byte, finalize_clone: bool = false) {
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_blake2.final(ctx, hash, finalize_clone)
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}
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// clone clones the Context other into ctx.
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clone :: proc(ctx, other: ^Context) {
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_blake2.clone(ctx, other)
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}
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// reset sanitizes the Context. The Context must be re-initialized to
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// be used again.
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reset :: proc(ctx: ^Context) {
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_blake2.reset(ctx)
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}
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