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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
1.6 KiB
Go
68 lines
1.6 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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"crypto/sha256"
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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/pbkdf2"
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)
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func init() {
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MustRegister("pbkdf2", NewPBKDF2Hasher)
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}
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// PBKDF2Hasher implements PasswordHasher
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// and uses the PBKDF2 key derivation function.
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type PBKDF2Hasher struct {
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iter, keyLen int
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}
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// HashWithSaltBytes a provided password and salt
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func (hasher *PBKDF2Hasher) 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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return hex.EncodeToString(pbkdf2.Key([]byte(password), salt, hasher.iter, hasher.keyLen, sha256.New))
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}
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// NewPBKDF2Hasher is a factory method to create an PBKDF2Hasher
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// config should be either empty or of the form:
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// "<iter>$<keyLen>", where <x> is the string representation
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// of an integer
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func NewPBKDF2Hasher(config string) *PBKDF2Hasher {
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// This default configuration uses the following parameters:
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// iter=10000, keyLen=50.
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// This matches the original configuration for `pbkdf2` prior to storing parameters
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// in the database.
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// THESE VALUES MUST NOT BE CHANGED OR BACKWARDS COMPATIBILITY WILL BREAK
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hasher := &PBKDF2Hasher{
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iter: 10_000,
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keyLen: 50,
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}
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if config == "" {
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return hasher
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}
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vals := strings.SplitN(config, "$", 2)
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if len(vals) != 2 {
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log.Error("invalid pbkdf2 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.iter, err = parseIntParam(vals[0], "iter", "pbkdf2", config, nil)
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hasher.keyLen, err = parseIntParam(vals[1], "keyLen", "pbkdf2", 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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