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68 lines
1.6 KiB
68 lines
1.6 KiB
// Copyright 2023 The Gitea Authors. 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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"code.gitea.io/gitea/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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Register("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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