Initial import

ssh/sshutil/key.go

@@ -0,0 +1,62 @@
+package sshutil
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+	"math/big"
+
+	"golang.org/x/crypto/ssh"
+)
+
+func KeyBits(key ssh.PublicKey) int {
+	if key == nil {
+		return 0
+	}
+	switch key.Type() {
+	case ssh.KeyAlgoECDSA256:
+		return 256
+	case ssh.KeyAlgoSKECDSA256:
+		return 256
+	case ssh.KeyAlgoECDSA384:
+		return 384
+	case ssh.KeyAlgoECDSA521:
+		return 521
+	case ssh.KeyAlgoED25519:
+		return 256
+	case ssh.KeyAlgoSKED25519:
+		return 256
+	case ssh.KeyAlgoRSA:
+		var w struct {
+			Name string
+			E    *big.Int
+			N    *big.Int
+			Rest []byte `ssh:"rest"`
+		}
+		_ = ssh.Unmarshal(key.Marshal(), &w)
+		return w.N.BitLen()
+	default:
+		return 0
+	}
+}
+
+func KeyType(key ssh.PublicKey) string {
+	if key == nil {
+		return "<nil>"
+	}
+	switch key.Type() {
+	case ssh.KeyAlgoECDSA256, ssh.KeyAlgoSKECDSA256, ssh.KeyAlgoECDSA384, ssh.KeyAlgoECDSA521:
+		return "ECDSA"
+	case ssh.KeyAlgoED25519, ssh.KeyAlgoSKED25519:
+		return "ED25519"
+	case ssh.KeyAlgoRSA:
+		return "RSA"
+	default:
+		return key.Type()
+	}
+}
+
+func KeyFingerprint(key ssh.PublicKey) string {
+	h := sha256.New()
+	h.Write(key.Marshal())
+	return "SHA256:" + base64.RawStdEncoding.EncodeToString(h.Sum(nil))
+}

ssh/sshutil/request.go

@@ -0,0 +1,47 @@
+package sshutil
+
+import "golang.org/x/crypto/ssh"
+
+type EnvRequest struct {
+	Key, Value string
+}
+
+func ParseEnvRequest(data []byte) (*EnvRequest, error) {
+	r := new(EnvRequest)
+	if err := ssh.Unmarshal(data, r); err != nil {
+		return nil, err
+	}
+	return r, nil
+}
+
+type PTYRequest struct {
+	Term     string
+	Columns  uint32
+	Rows     uint32
+	Width    uint32
+	Height   uint32
+	ModeList []byte
+}
+
+func ParsePTYRequest(data []byte) (*PTYRequest, error) {
+	r := new(PTYRequest)
+	if err := ssh.Unmarshal(data, r); err != nil {
+		return nil, err
+	}
+	return r, nil
+}
+
+type WindowChangeRequest struct {
+	Columns uint32
+	Rows    uint32
+	Width   uint32
+	Height  uint32
+}
+
+func ParseWindowChangeRequest(data []byte) (*WindowChangeRequest, error) {
+	r := new(WindowChangeRequest)
+	if err := ssh.Unmarshal(data, r); err != nil {
+		return nil, err
+	}
+	return r, nil
+}