mirror of
https://github.com/cheat/cheat.git
synced 2024-11-16 08:58:28 +01:00
80c91cbdee
Integrate `go-git` into the application, and use it to `git clone` cheatsheets when the installer runs. Previously, the installer required that `git` be installed on the system `PATH`, so this change has to big advantages: 1. It removes that system dependency on `git` 2. It paves the way for implementing the `--update` command Additionally, `cheat` now performs a `--depth=1` clone when installing cheatsheets, which should at least somewhat improve installation times (especially on slow network connections).
69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package sha3
|
|
|
|
// This file provides functions for creating instances of the SHA-3
|
|
// and SHAKE hash functions, as well as utility functions for hashing
|
|
// bytes.
|
|
|
|
// New224 creates a new SHA3-224 hash.
|
|
// Its generic security strength is 224 bits against preimage attacks,
|
|
// and 112 bits against collision attacks.
|
|
func New224() State {
|
|
return State{rate: 144, outputLen: 28, dsbyte: 0x06}
|
|
}
|
|
|
|
// New256 creates a new SHA3-256 hash.
|
|
// Its generic security strength is 256 bits against preimage attacks,
|
|
// and 128 bits against collision attacks.
|
|
func New256() State {
|
|
return State{rate: 136, outputLen: 32, dsbyte: 0x06}
|
|
}
|
|
|
|
// New384 creates a new SHA3-384 hash.
|
|
// Its generic security strength is 384 bits against preimage attacks,
|
|
// and 192 bits against collision attacks.
|
|
func New384() State {
|
|
return State{rate: 104, outputLen: 48, dsbyte: 0x06}
|
|
}
|
|
|
|
// New512 creates a new SHA3-512 hash.
|
|
// Its generic security strength is 512 bits against preimage attacks,
|
|
// and 256 bits against collision attacks.
|
|
func New512() State {
|
|
return State{rate: 72, outputLen: 64, dsbyte: 0x06}
|
|
}
|
|
|
|
// Sum224 returns the SHA3-224 digest of the data.
|
|
func Sum224(data []byte) (digest [28]byte) {
|
|
h := New224()
|
|
_, _ = h.Write(data)
|
|
h.Sum(digest[:0])
|
|
return
|
|
}
|
|
|
|
// Sum256 returns the SHA3-256 digest of the data.
|
|
func Sum256(data []byte) (digest [32]byte) {
|
|
h := New256()
|
|
_, _ = h.Write(data)
|
|
h.Sum(digest[:0])
|
|
return
|
|
}
|
|
|
|
// Sum384 returns the SHA3-384 digest of the data.
|
|
func Sum384(data []byte) (digest [48]byte) {
|
|
h := New384()
|
|
_, _ = h.Write(data)
|
|
h.Sum(digest[:0])
|
|
return
|
|
}
|
|
|
|
// Sum512 returns the SHA3-512 digest of the data.
|
|
func Sum512(data []byte) (digest [64]byte) {
|
|
h := New512()
|
|
_, _ = h.Write(data)
|
|
h.Sum(digest[:0])
|
|
return
|
|
}
|