mirror of
https://github.com/cheat/cheat.git
synced 2024-11-23 06:21:35 +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).
88 lines
2.1 KiB
Go
88 lines
2.1 KiB
Go
package ed25519
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import (
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"crypto/rand"
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"encoding/asn1"
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"github.com/cloudflare/circl/sign"
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)
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var sch sign.Scheme = &scheme{}
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// Scheme returns a signature interface.
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func Scheme() sign.Scheme { return sch }
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type scheme struct{}
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func (*scheme) Name() string { return "Ed25519" }
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func (*scheme) PublicKeySize() int { return PublicKeySize }
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func (*scheme) PrivateKeySize() int { return PrivateKeySize }
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func (*scheme) SignatureSize() int { return SignatureSize }
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func (*scheme) SeedSize() int { return SeedSize }
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func (*scheme) TLSIdentifier() uint { return 0x0807 }
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func (*scheme) SupportsContext() bool { return false }
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func (*scheme) Oid() asn1.ObjectIdentifier {
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return asn1.ObjectIdentifier{1, 3, 101, 112}
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}
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func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) {
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return GenerateKey(rand.Reader)
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}
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func (*scheme) Sign(
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sk sign.PrivateKey,
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message []byte,
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opts *sign.SignatureOpts,
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) []byte {
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priv, ok := sk.(PrivateKey)
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if !ok {
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panic(sign.ErrTypeMismatch)
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}
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if opts != nil && opts.Context != "" {
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panic(sign.ErrContextNotSupported)
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}
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return Sign(priv, message)
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}
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func (*scheme) Verify(
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pk sign.PublicKey,
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message, signature []byte,
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opts *sign.SignatureOpts,
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) bool {
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pub, ok := pk.(PublicKey)
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if !ok {
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panic(sign.ErrTypeMismatch)
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}
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if opts != nil {
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if opts.Context != "" {
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panic(sign.ErrContextNotSupported)
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}
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}
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return Verify(pub, message, signature)
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}
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func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) {
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privateKey := NewKeyFromSeed(seed)
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publicKey := make(PublicKey, PublicKeySize)
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copy(publicKey, privateKey[SeedSize:])
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return publicKey, privateKey
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}
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func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) {
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if len(buf) < PublicKeySize {
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return nil, sign.ErrPubKeySize
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}
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pub := make(PublicKey, PublicKeySize)
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copy(pub, buf[:PublicKeySize])
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return pub, nil
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}
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func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) {
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if len(buf) < PrivateKeySize {
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return nil, sign.ErrPrivKeySize
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}
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priv := make(PrivateKey, PrivateKeySize)
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copy(priv, buf[:PrivateKeySize])
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return priv, nil
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}
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