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* feat: sftp server support * fix(sftp-server): try fix build failed * fix: sftp download lack
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| package bootstrap | ||
|
|
||
| import ( | ||
| "crypto/rand" | ||
| "crypto/rsa" | ||
| "crypto/x509" | ||
| "encoding/pem" | ||
| "fmt" | ||
| "github.com/alist-org/alist/v3/cmd/flags" | ||
| "github.com/alist-org/alist/v3/internal/conf" | ||
| "github.com/alist-org/alist/v3/pkg/utils" | ||
| "golang.org/x/crypto/ssh" | ||
| "os" | ||
| "path/filepath" | ||
| ) | ||
|
|
||
| func InitHostKey() { | ||
| sshPath := filepath.Join(flags.DataDir, "ssh") | ||
| if !utils.Exists(sshPath) { | ||
| err := utils.CreateNestedDirectory(sshPath) | ||
| if err != nil { | ||
| utils.Log.Fatalf("failed to create ssh directory: %+v", err) | ||
| return | ||
| } | ||
| } | ||
| conf.SSHSigners = make([]ssh.Signer, 0, 4) | ||
| if rsaKey, ok := LoadOrGenerateRSAHostKey(sshPath); ok { | ||
| conf.SSHSigners = append(conf.SSHSigners, rsaKey) | ||
| } | ||
| // TODO Add keys for other encryption algorithms | ||
| } | ||
|
|
||
| func LoadOrGenerateRSAHostKey(parentDir string) (ssh.Signer, bool) { | ||
| privateKeyPath := filepath.Join(parentDir, "ssh_host_rsa_key") | ||
| publicKeyPath := filepath.Join(parentDir, "ssh_host_rsa_key.pub") | ||
| privateKeyBytes, err := os.ReadFile(privateKeyPath) | ||
| if err == nil { | ||
| var privateKey *rsa.PrivateKey | ||
| privateKey, err = rsaDecodePrivateKey(privateKeyBytes) | ||
| if err == nil { | ||
| var ret ssh.Signer | ||
| ret, err = ssh.NewSignerFromKey(privateKey) | ||
| if err == nil { | ||
| return ret, true | ||
| } | ||
| } | ||
| } | ||
| _ = os.Remove(privateKeyPath) | ||
| _ = os.Remove(publicKeyPath) | ||
| privateKey, err := rsa.GenerateKey(rand.Reader, 4096) | ||
| if err != nil { | ||
| utils.Log.Fatalf("failed to generate RSA private key: %+v", err) | ||
| return nil, false | ||
| } | ||
| publicKey, err := ssh.NewPublicKey(&privateKey.PublicKey) | ||
| if err != nil { | ||
| utils.Log.Fatalf("failed to generate RSA public key: %+v", err) | ||
| return nil, false | ||
| } | ||
| ret, err := ssh.NewSignerFromKey(privateKey) | ||
| if err != nil { | ||
| utils.Log.Fatalf("failed to generate RSA signer: %+v", err) | ||
| return nil, false | ||
| } | ||
| privateBytes := rsaEncodePrivateKey(privateKey) | ||
| publicBytes := ssh.MarshalAuthorizedKey(publicKey) | ||
| err = os.WriteFile(privateKeyPath, privateBytes, 0600) | ||
| if err != nil { | ||
| utils.Log.Fatalf("failed to write RSA private key to file: %+v", err) | ||
| return nil, false | ||
| } | ||
| err = os.WriteFile(publicKeyPath, publicBytes, 0644) | ||
| if err != nil { | ||
| _ = os.Remove(privateKeyPath) | ||
| utils.Log.Fatalf("failed to write RSA public key to file: %+v", err) | ||
| return nil, false | ||
| } | ||
| return ret, true | ||
| } | ||
|
|
||
| func rsaEncodePrivateKey(privateKey *rsa.PrivateKey) []byte { | ||
| privateKeyBytes := x509.MarshalPKCS1PrivateKey(privateKey) | ||
| privateBlock := &pem.Block{ | ||
| Type: "RSA PRIVATE KEY", | ||
| Headers: nil, | ||
| Bytes: privateKeyBytes, | ||
| } | ||
| return pem.EncodeToMemory(privateBlock) | ||
| } | ||
|
|
||
| func rsaDecodePrivateKey(bytes []byte) (*rsa.PrivateKey, error) { | ||
| block, _ := pem.Decode(bytes) | ||
| if block == nil { | ||
| return nil, fmt.Errorf("failed to parse PEM block containing the key") | ||
| } | ||
| privateKey, err := x509.ParsePKCS1PrivateKey(block.Bytes) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return privateKey, nil | ||
| } |
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