forgejo/modules/secret/secret.go

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// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
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package secret
import (
"crypto/aes"
"crypto/cipher"
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"crypto/rand"
[GITEA] Drop sha256-simd in favor of stdlib - In Go 1.21 the crypto/sha256 [got a massive improvement](https://go.dev/doc/go1.21#crypto/sha256) by utilizing the SHA instructions for AMD64 CPUs, which sha256-simd already was doing. The performance is now on par and I think it's preferable to use the standard library rather than a package when possible. ``` cpu: AMD Ryzen 5 3600X 6-Core Processor │ simd.txt │ go.txt │ │ sec/op │ sec/op vs base │ Hash/8Bytes-12 63.25n ± 1% 73.38n ± 1% +16.02% (p=0.002 n=6) Hash/64Bytes-12 98.73n ± 1% 105.30n ± 1% +6.65% (p=0.002 n=6) Hash/1K-12 567.2n ± 1% 572.8n ± 1% +0.99% (p=0.002 n=6) Hash/8K-12 4.062µ ± 1% 4.062µ ± 1% ~ (p=0.396 n=6) Hash/1M-12 512.1µ ± 0% 510.6µ ± 1% ~ (p=0.485 n=6) Hash/5M-12 2.556m ± 1% 2.564m ± 0% ~ (p=0.093 n=6) Hash/10M-12 5.112m ± 0% 5.127m ± 0% ~ (p=0.093 n=6) geomean 13.82µ 14.27µ +3.28% │ simd.txt │ go.txt │ │ B/s │ B/s vs base │ Hash/8Bytes-12 120.6Mi ± 1% 104.0Mi ± 1% -13.81% (p=0.002 n=6) Hash/64Bytes-12 618.2Mi ± 1% 579.8Mi ± 1% -6.22% (p=0.002 n=6) Hash/1K-12 1.682Gi ± 1% 1.665Gi ± 1% -0.98% (p=0.002 n=6) Hash/8K-12 1.878Gi ± 1% 1.878Gi ± 1% ~ (p=0.310 n=6) Hash/1M-12 1.907Gi ± 0% 1.913Gi ± 1% ~ (p=0.485 n=6) Hash/5M-12 1.911Gi ± 1% 1.904Gi ± 0% ~ (p=0.093 n=6) Hash/10M-12 1.910Gi ± 0% 1.905Gi ± 0% ~ (p=0.093 n=6) geomean 1.066Gi 1.032Gi -3.18% ``` (cherry picked from commit abd94ff5b59c86e793fd9bf12187ea6cfd1f3fa1) (cherry picked from commit 15e81637abf70576a564cf9eecaa9640228afb5b) Conflicts: go.mod https://codeberg.org/forgejo/forgejo/pulls/1581 (cherry picked from commit 325d92917f655c999b81b08832ee623d6b669f0f) Conflicts: modules/context/context_cookie.go https://codeberg.org/forgejo/forgejo/pulls/1617 (cherry picked from commit 358819e8959886faa171ac16541097500d0a703e) (cherry picked from commit 362fd7aae17832fa922fa017794bc564ca43060d) (cherry picked from commit 4f64ee294ee05c93042b6ec68f0a179ec249dab9) (cherry picked from commit 4bde77f7b13c5f961c141c01b6da1f9eda5ec387) (cherry picked from commit 1311e30a811675eb623692349e4e808a85aabef6) (cherry picked from commit 57b69e334c2973118488b9b5dbdc8a2c88135756) (cherry picked from commit 52dc892fadecf39e89c3c351edc9efb42522257b)
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"crypto/sha256"
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"encoding/base64"
"encoding/hex"
"errors"
"fmt"
"io"
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)
// AesEncrypt encrypts text and given key with AES.
func AesEncrypt(key, text []byte) ([]byte, error) {
block, err := aes.NewCipher(key)
if err != nil {
return nil, fmt.Errorf("AesEncrypt invalid key: %v", err)
}
b := base64.StdEncoding.EncodeToString(text)
ciphertext := make([]byte, aes.BlockSize+len(b))
iv := ciphertext[:aes.BlockSize]
if _, err = io.ReadFull(rand.Reader, iv); err != nil {
return nil, fmt.Errorf("AesEncrypt unable to read IV: %w", err)
}
cfb := cipher.NewCFBEncrypter(block, iv)
cfb.XORKeyStream(ciphertext[aes.BlockSize:], []byte(b))
return ciphertext, nil
}
// AesDecrypt decrypts text and given key with AES.
func AesDecrypt(key, text []byte) ([]byte, error) {
block, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
if len(text) < aes.BlockSize {
return nil, errors.New("AesDecrypt ciphertext too short")
}
iv := text[:aes.BlockSize]
text = text[aes.BlockSize:]
cfb := cipher.NewCFBDecrypter(block, iv)
cfb.XORKeyStream(text, text)
data, err := base64.StdEncoding.DecodeString(string(text))
if err != nil {
return nil, fmt.Errorf("AesDecrypt invalid decrypted base64 string: %w", err)
}
return data, nil
}
// EncryptSecret encrypts a string with given key into a hex string
func EncryptSecret(key, str string) (string, error) {
keyHash := sha256.Sum256([]byte(key))
plaintext := []byte(str)
ciphertext, err := AesEncrypt(keyHash[:], plaintext)
if err != nil {
return "", fmt.Errorf("failed to encrypt by secret: %w", err)
}
return hex.EncodeToString(ciphertext), nil
}
// DecryptSecret decrypts a previously encrypted hex string
func DecryptSecret(key, cipherHex string) (string, error) {
keyHash := sha256.Sum256([]byte(key))
ciphertext, err := hex.DecodeString(cipherHex)
if err != nil {
return "", fmt.Errorf("failed to decrypt by secret, invalid hex string: %w", err)
}
plaintext, err := AesDecrypt(keyHash[:], ciphertext)
if err != nil {
return "", fmt.Errorf("failed to decrypt by secret, the key (maybe SECRET_KEY?) might be incorrect: %w", err)
}
return string(plaintext), nil
}