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4b58e3b6d4
(cherry picked from commit3ea0b287d7) (cherry picked from commitdb8392a8ac) (cherry picked from commitbd2a5fa292) (cherry picked from commit2436acb3d9) (cherry picked from commit62f50e1c52) (cherry picked from commitdba1892521)
77 lines
2.7 KiB
Go
77 lines
2.7 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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// DefaultHashAlgorithmName represents the default value of PASSWORD_HASH_ALGO
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// configured in app.ini.
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//
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// It is NOT the same and does NOT map to the defaultEmptyHashAlgorithmSpecification.
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//
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// It will be dealiased as per aliasAlgorithmNames whereas
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// defaultEmptyHashAlgorithmSpecification does not undergo dealiasing.
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const DefaultHashAlgorithmName = "pbkdf2_hi"
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var DefaultHashAlgorithm *PasswordHashAlgorithm
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// aliasAlgorithNames provides a mapping between the value of PASSWORD_HASH_ALGO
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// configured in the app.ini and the parameters used within the hashers internally.
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//
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// If it is necessary to change the default parameters for any hasher in future you
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// should change these values and not those in argon2.go etc.
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var aliasAlgorithmNames = map[string]string{
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"argon2": "argon2$2$65536$8$50",
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"bcrypt": "bcrypt$10",
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"scrypt": "scrypt$65536$16$2$50",
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"pbkdf2": "pbkdf2_v2", // pbkdf2 should default to pbkdf2_v2
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"pbkdf2_v1": "pbkdf2$10000$50",
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// The latest PBKDF2 password algorithm is used as the default since it doesn't
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// use a lot of memory and is safer to use on less powerful devices.
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"pbkdf2_v2": "pbkdf2$50000$50",
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// The pbkdf2_hi password algorithm is offered as a stronger alternative to the
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// slightly improved pbkdf2_v2 algorithm
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"pbkdf2_hi": "pbkdf2$320000$50",
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}
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var RecommendedHashAlgorithms = []string{
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"pbkdf2",
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"argon2",
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"bcrypt",
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"scrypt",
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"pbkdf2_hi",
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}
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// hashAlgorithmToSpec converts an algorithm name or a specification to a full algorithm specification
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func hashAlgorithmToSpec(algorithmName string) string {
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if algorithmName == "" {
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algorithmName = DefaultHashAlgorithmName
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}
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alias, has := aliasAlgorithmNames[algorithmName]
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for has {
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algorithmName = alias
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alias, has = aliasAlgorithmNames[algorithmName]
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}
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return algorithmName
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}
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// SetDefaultPasswordHashAlgorithm will take a provided algorithmName and de-alias it to
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// a complete algorithm specification.
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func SetDefaultPasswordHashAlgorithm(algorithmName string) (string, *PasswordHashAlgorithm) {
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algoSpec := hashAlgorithmToSpec(algorithmName)
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// now we get a full specification, e.g. pbkdf2$50000$50 rather than pbdkf2
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DefaultHashAlgorithm = Parse(algoSpec)
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return algoSpec, DefaultHashAlgorithm
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}
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// ConfigHashAlgorithm will try to find a "recommended algorithm name" defined by RecommendedHashAlgorithms for config
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// This function is not fast and is only used for the installation page
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func ConfigHashAlgorithm(algorithm string) string {
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algorithm = hashAlgorithmToSpec(algorithm)
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for _, recommAlgo := range RecommendedHashAlgorithms {
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if algorithm == hashAlgorithmToSpec(recommAlgo) {
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return recommAlgo
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}
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}
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return algorithm
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}
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