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zeekay
cc986c328d
Squashes all pre-rewrite history into a single root commit. Previous tree: - 14506 commits including upstream Infisical fork history - Multiple merge chains carrying pre-purge content Force-rewrite per disk-space reclamation discipline. GHCR images (1.9.9, 1.9.11) remain immutable; their git lineage is no longer materialized.
86 lines
1.9 KiB
Go
86 lines
1.9 KiB
Go
// Package xof provides an interface for eXtendable-Output Functions.
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//
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// # Available Functions
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//
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// SHAKE functions are defined in FIPS-202, see https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf.
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// BLAKE2Xb and BLAKE2Xs are defined in https://www.blake2.net/blake2x.pdf.
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package xof
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import (
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"io"
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"github.com/cloudflare/circl/internal/sha3"
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"github.com/cloudflare/circl/xof/k12"
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"golang.org/x/crypto/blake2b"
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"golang.org/x/crypto/blake2s"
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)
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// XOF defines the interface to hash functions that support arbitrary-length output.
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type XOF interface {
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// Write absorbs more data into the XOF's state. It panics if called
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// after Read.
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io.Writer
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// Read reads more output from the XOF. It returns io.EOF if the limit
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// has been reached.
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io.Reader
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// Clone returns a copy of the XOF in its current state.
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Clone() XOF
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// Reset restores the XOF to its initial state and discards all data appended by Write.
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Reset()
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}
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type ID uint
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const (
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SHAKE128 ID = iota + 1
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SHAKE256
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BLAKE2XB
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BLAKE2XS
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K12D10
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)
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func (x ID) New() XOF {
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switch x {
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case SHAKE128:
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s := sha3.NewShake128()
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return shakeBody{&s}
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case SHAKE256:
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s := sha3.NewShake256()
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return shakeBody{&s}
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case BLAKE2XB:
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x, _ := blake2b.NewXOF(blake2b.OutputLengthUnknown, nil)
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return blake2xb{x}
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case BLAKE2XS:
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x, _ := blake2s.NewXOF(blake2s.OutputLengthUnknown, nil)
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return blake2xs{x}
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case K12D10:
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x := k12.NewDraft10([]byte{})
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return k12d10{&x}
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default:
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panic("crypto: requested unavailable XOF function")
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}
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}
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type shakeBody struct{ sha3.ShakeHash }
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func (s shakeBody) Clone() XOF { return shakeBody{s.ShakeHash.Clone()} }
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type blake2xb struct{ blake2b.XOF }
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func (s blake2xb) Clone() XOF { return blake2xb{s.XOF.Clone()} }
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type blake2xs struct{ blake2s.XOF }
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func (s blake2xs) Clone() XOF { return blake2xs{s.XOF.Clone()} }
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type k12d10 struct{ *k12.State }
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func (s k12d10) Clone() XOF {
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x := s.State.Clone()
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return k12d10{&x}
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}
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