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zeekayandHanzo Dev
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Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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package hash
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import (
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"encoding/hex"
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"strings"
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"github.com/hanzoai/git/modules/log"
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"golang.org/x/crypto/scrypt"
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)
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func init() {
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MustRegister("scrypt", NewScryptHasher)
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}
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// ScryptHasher implements PasswordHasher
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// and uses the scrypt key derivation function.
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type ScryptHasher struct {
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n, r, p, keyLen int
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}
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// HashWithSaltBytes a provided password and salt
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func (hasher *ScryptHasher) HashWithSaltBytes(password string, salt []byte) string {
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if hasher == nil {
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return ""
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}
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hashedPassword, _ := scrypt.Key([]byte(password), salt, hasher.n, hasher.r, hasher.p, hasher.keyLen)
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return hex.EncodeToString(hashedPassword)
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}
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// NewScryptHasher is a factory method to create an ScryptHasher
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// The provided config should be either empty or of the form:
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// "<n>$<r>$<p>$<keyLen>", where <x> is the string representation
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// of an integer
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func NewScryptHasher(config string) *ScryptHasher {
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// This matches the original configuration for `scrypt` prior to storing hash parameters
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// in the database.
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// THESE VALUES MUST NOT BE CHANGED OR BACKWARDS COMPATIBILITY WILL BREAK
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hasher := &ScryptHasher{
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n: 1 << 16,
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r: 16,
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p: 2, // 2 passes through memory - this default config will use 128MiB in total.
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keyLen: 50,
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}
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if config == "" {
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return hasher
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}
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vals := strings.SplitN(config, "$", 4)
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if len(vals) != 4 {
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log.Error("invalid scrypt hash spec %s", config)
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return nil
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}
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var err error
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hasher.n, err = parseIntParam(vals[0], "n", "scrypt", config, nil)
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hasher.r, err = parseIntParam(vals[1], "r", "scrypt", config, err)
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hasher.p, err = parseIntParam(vals[2], "p", "scrypt", config, err)
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hasher.keyLen, err = parseIntParam(vals[3], "keyLen", "scrypt", config, err)
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if err != nil {
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return nil
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}
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return hasher
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}
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