ec1f89217a
Full Mattermost server source with integrated Community Enterprise features. Includes vendor directory for offline/air-gapped builds. Structure: - enterprise-impl/: Enterprise feature implementations - enterprise-community/: Init files that register implementations - enterprise/: Bridge imports (community_imports.go) - vendor/: All dependencies for offline builds Build (online): go build ./cmd/mattermost Build (offline/air-gapped): go build -mod=vendor ./cmd/mattermost 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
70 lines
1.3 KiB
Go
70 lines
1.3 KiB
Go
package aes7z
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import (
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"bytes"
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"crypto/sha256"
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"encoding/binary"
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"encoding/hex"
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"fmt"
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"sync"
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lru "github.com/hashicorp/golang-lru/v2"
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"golang.org/x/text/encoding/unicode"
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"golang.org/x/text/transform"
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)
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type cacheKey struct {
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password string
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cycles int
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salt string // []byte isn't comparable
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}
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const cacheSize = 10
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//nolint:gochecknoglobals
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var once = sync.OnceValues(func() (*lru.Cache[cacheKey, []byte], error) {
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return lru.New[cacheKey, []byte](cacheSize)
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})
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func calculateKey(password string, cycles int, salt []byte) ([]byte, error) {
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cache, err := once()
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if err != nil {
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return nil, fmt.Errorf("aes7z: error creating cache: %w", err)
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}
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ck := cacheKey{
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password: password,
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cycles: cycles,
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salt: hex.EncodeToString(salt),
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}
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if key, ok := cache.Get(ck); ok {
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return key, nil
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}
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b := bytes.NewBuffer(salt)
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// Convert password to UTF-16LE
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utf16le := unicode.UTF16(unicode.LittleEndian, unicode.IgnoreBOM)
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t := transform.NewWriter(b, utf16le.NewEncoder())
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_, _ = t.Write([]byte(password))
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key := make([]byte, sha256.Size)
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if cycles == 0x3f {
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copy(key, b.Bytes())
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} else {
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h := sha256.New()
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for i := uint64(0); i < 1<<cycles; i++ {
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// These will never error
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_, _ = h.Write(b.Bytes())
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_ = binary.Write(h, binary.LittleEndian, i)
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}
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copy(key, h.Sum(nil))
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}
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_ = cache.Add(ck, key)
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return key, nil
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}
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