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75 lines
2.0 KiB
Go
75 lines
2.0 KiB
Go
// 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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"encoding/hex"
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"strings"
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"gitea.dev/modules/log"
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"golang.org/x/crypto/argon2"
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)
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func init() {
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MustRegister("argon2", NewArgon2Hasher)
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}
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// Argon2Hasher implements PasswordHasher
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// and uses the Argon2 key derivation function, hybrant variant
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type Argon2Hasher struct {
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time uint32
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memory uint32
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threads uint8
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keyLen uint32
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}
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// HashWithSaltBytes a provided password and salt
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func (hasher *Argon2Hasher) 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(argon2.IDKey([]byte(password), salt, hasher.time, hasher.memory, hasher.threads, hasher.keyLen))
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}
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// NewArgon2Hasher is a factory method to create an Argon2Hasher
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// The provided config should be either empty or of the form:
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// "<time>$<memory>$<threads>$<keyLen>", where <x> is the string representation
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// of an integer
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func NewArgon2Hasher(config string) *Argon2Hasher {
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// This default configuration uses the following parameters:
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// time=2, memory=64*1024, threads=8, keyLen=50.
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// It will make two passes through the memory, using 64MiB in total.
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// This matches the original configuration for `argon2` prior to storing hash parameters
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// in the database.
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// THESE VALUES MUST NOT BE CHANGED OR BACKWARDS COMPATIBILITY WILL BREAK
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hasher := &Argon2Hasher{
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time: 2,
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memory: 1 << 16,
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threads: 8,
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keyLen: 50,
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}
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if config == "" {
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return hasher
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}
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vals := strings.SplitN(config, "$", 4)
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if len(vals) != 4 {
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log.Error("invalid argon2 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.time, err = parseUintParam[uint32](vals[0], "time", "argon2", config, nil)
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hasher.memory, err = parseUintParam[uint32](vals[1], "memory", "argon2", config, err)
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hasher.threads, err = parseUintParam[uint8](vals[2], "threads", "argon2", config, err)
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hasher.keyLen, err = parseUintParam[uint32](vals[3], "keyLen", "argon2", 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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