| // Copyright 2014 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package ssh |
| |
| import ( |
| "bytes" |
| "crypto/dsa" |
| "crypto/ecdsa" |
| "crypto/elliptic" |
| "crypto/rand" |
| "crypto/rsa" |
| "crypto/x509" |
| "encoding/base64" |
| "encoding/hex" |
| "encoding/pem" |
| "fmt" |
| "io" |
| "reflect" |
| "strings" |
| "testing" |
| |
| "golang.org/x/crypto/ed25519" |
| "golang.org/x/crypto/ssh/testdata" |
| ) |
| |
| func rawKey(pub PublicKey) interface{} { |
| switch k := pub.(type) { |
| case *rsaPublicKey: |
| return (*rsa.PublicKey)(k) |
| case *dsaPublicKey: |
| return (*dsa.PublicKey)(k) |
| case *ecdsaPublicKey: |
| return (*ecdsa.PublicKey)(k) |
| case ed25519PublicKey: |
| return (ed25519.PublicKey)(k) |
| case *Certificate: |
| return k |
| } |
| panic("unknown key type") |
| } |
| |
| func TestKeyMarshalParse(t *testing.T) { |
| for _, priv := range testSigners { |
| pub := priv.PublicKey() |
| roundtrip, err := ParsePublicKey(pub.Marshal()) |
| if err != nil { |
| t.Errorf("ParsePublicKey(%T): %v", pub, err) |
| } |
| |
| k1 := rawKey(pub) |
| k2 := rawKey(roundtrip) |
| |
| if !reflect.DeepEqual(k1, k2) { |
| t.Errorf("got %#v in roundtrip, want %#v", k2, k1) |
| } |
| } |
| } |
| |
| func TestUnsupportedCurves(t *testing.T) { |
| raw, err := ecdsa.GenerateKey(elliptic.P224(), rand.Reader) |
| if err != nil { |
| t.Fatalf("GenerateKey: %v", err) |
| } |
| |
| if _, err = NewSignerFromKey(raw); err == nil || !strings.Contains(err.Error(), "only P-256") { |
| t.Fatalf("NewPrivateKey should not succeed with P-224, got: %v", err) |
| } |
| |
| if _, err = NewPublicKey(&raw.PublicKey); err == nil || !strings.Contains(err.Error(), "only P-256") { |
| t.Fatalf("NewPublicKey should not succeed with P-224, got: %v", err) |
| } |
| } |
| |
| func TestNewPublicKey(t *testing.T) { |
| for _, k := range testSigners { |
| raw := rawKey(k.PublicKey()) |
| // Skip certificates, as NewPublicKey does not support them. |
| if _, ok := raw.(*Certificate); ok { |
| continue |
| } |
| pub, err := NewPublicKey(raw) |
| if err != nil { |
| t.Errorf("NewPublicKey(%#v): %v", raw, err) |
| } |
| if !reflect.DeepEqual(k.PublicKey(), pub) { |
| t.Errorf("NewPublicKey(%#v) = %#v, want %#v", raw, pub, k.PublicKey()) |
| } |
| } |
| } |
| |
| func TestKeySignVerify(t *testing.T) { |
| for _, priv := range testSigners { |
| pub := priv.PublicKey() |
| |
| data := []byte("sign me") |
| sig, err := priv.Sign(rand.Reader, data) |
| if err != nil { |
| t.Fatalf("Sign(%T): %v", priv, err) |
| } |
| |
| if err := pub.Verify(data, sig); err != nil { |
| t.Errorf("publicKey.Verify(%T): %v", priv, err) |
| } |
| sig.Blob[5]++ |
| if err := pub.Verify(data, sig); err == nil { |
| t.Errorf("publicKey.Verify on broken sig did not fail") |
| } |
| } |
| } |
| |
| func TestKeySignWithAlgorithmVerify(t *testing.T) { |
| for _, priv := range testSigners { |
| if algorithmSigner, ok := priv.(AlgorithmSigner); !ok { |
| t.Errorf("Signers constructed by ssh package should always implement the AlgorithmSigner interface: %T", priv) |
| } else { |
| pub := priv.PublicKey() |
| data := []byte("sign me") |
| |
| signWithAlgTestCase := func(algorithm string, expectedAlg string) { |
| sig, err := algorithmSigner.SignWithAlgorithm(rand.Reader, data, algorithm) |
| if err != nil { |
| t.Fatalf("Sign(%T): %v", priv, err) |
| } |
| if sig.Format != expectedAlg { |
| t.Errorf("signature format did not match requested signature algorithm: %s != %s", sig.Format, expectedAlg) |
| } |
| |
| if err := pub.Verify(data, sig); err != nil { |
| t.Errorf("publicKey.Verify(%T): %v", priv, err) |
| } |
| sig.Blob[5]++ |
| if err := pub.Verify(data, sig); err == nil { |
| t.Errorf("publicKey.Verify on broken sig did not fail") |
| } |
| } |
| |
| // Using the empty string as the algorithm name should result in the same signature format as the algorithm-free Sign method. |
| defaultSig, err := priv.Sign(rand.Reader, data) |
| if err != nil { |
| t.Fatalf("Sign(%T): %v", priv, err) |
| } |
| signWithAlgTestCase("", defaultSig.Format) |
| |
| // RSA keys are the only ones which currently support more than one signing algorithm |
| if pub.Type() == KeyAlgoRSA { |
| for _, algorithm := range []string{KeyAlgoRSA, KeyAlgoRSASHA256, KeyAlgoRSASHA512} { |
| signWithAlgTestCase(algorithm, algorithm) |
| } |
| } |
| } |
| } |
| } |
| |
| func TestParseRSAPrivateKey(t *testing.T) { |
| key := testPrivateKeys["rsa"] |
| |
| rsa, ok := key.(*rsa.PrivateKey) |
| if !ok { |
| t.Fatalf("got %T, want *rsa.PrivateKey", rsa) |
| } |
| |
| if err := rsa.Validate(); err != nil { |
| t.Errorf("Validate: %v", err) |
| } |
| } |
| |
| func TestParseECPrivateKey(t *testing.T) { |
| key := testPrivateKeys["ecdsa"] |
| |
| ecKey, ok := key.(*ecdsa.PrivateKey) |
| if !ok { |
| t.Fatalf("got %T, want *ecdsa.PrivateKey", ecKey) |
| } |
| |
| if !validateECPublicKey(ecKey.Curve, ecKey.X, ecKey.Y) { |
| t.Fatalf("public key does not validate.") |
| } |
| } |
| |
| func TestParseEncryptedPrivateKeysWithPassphrase(t *testing.T) { |
| data := []byte("sign me") |
| for _, tt := range testdata.PEMEncryptedKeys { |
| t.Run(tt.Name, func(t *testing.T) { |
| _, err := ParsePrivateKeyWithPassphrase(tt.PEMBytes, []byte("incorrect")) |
| if err != x509.IncorrectPasswordError { |
| t.Errorf("got %v want IncorrectPasswordError", err) |
| } |
| |
| s, err := ParsePrivateKeyWithPassphrase(tt.PEMBytes, []byte(tt.EncryptionKey)) |
| if err != nil { |
| t.Fatalf("ParsePrivateKeyWithPassphrase returned error: %s", err) |
| } |
| |
| sig, err := s.Sign(rand.Reader, data) |
| if err != nil { |
| t.Fatalf("Signer.Sign: %v", err) |
| } |
| if err := s.PublicKey().Verify(data, sig); err != nil { |
| t.Errorf("Verify failed: %v", err) |
| } |
| |
| _, err = ParsePrivateKey(tt.PEMBytes) |
| if err == nil { |
| t.Fatalf("ParsePrivateKey succeeded, expected an error") |
| } |
| |
| if err, ok := err.(*PassphraseMissingError); !ok { |
| t.Errorf("got error %q, want PassphraseMissingError", err) |
| } else if tt.IncludesPublicKey { |
| if err.PublicKey == nil { |
| t.Fatalf("expected PassphraseMissingError.PublicKey not to be nil") |
| } |
| got, want := err.PublicKey.Marshal(), s.PublicKey().Marshal() |
| if !bytes.Equal(got, want) { |
| t.Errorf("error field %q doesn't match signer public key %q", got, want) |
| } |
| } |
| }) |
| } |
| } |
| |
| func TestParseDSA(t *testing.T) { |
| // We actually exercise the ParsePrivateKey codepath here, as opposed to |
| // using the ParseRawPrivateKey+NewSignerFromKey path that testdata_test.go |
| // uses. |
| s, err := ParsePrivateKey(testdata.PEMBytes["dsa"]) |
| if err != nil { |
| t.Fatalf("ParsePrivateKey returned error: %s", err) |
| } |
| |
| data := []byte("sign me") |
| sig, err := s.Sign(rand.Reader, data) |
| if err != nil { |
| t.Fatalf("dsa.Sign: %v", err) |
| } |
| |
| if err := s.PublicKey().Verify(data, sig); err != nil { |
| t.Errorf("Verify failed: %v", err) |
| } |
| } |
| |
| // Tests for authorized_keys parsing. |
| |
| // getTestKey returns a public key, and its base64 encoding. |
| func getTestKey() (PublicKey, string) { |
| k := testPublicKeys["rsa"] |
| |
| b := &bytes.Buffer{} |
| e := base64.NewEncoder(base64.StdEncoding, b) |
| e.Write(k.Marshal()) |
| e.Close() |
| |
| return k, b.String() |
| } |
| |
| func TestMarshalParsePublicKey(t *testing.T) { |
| pub, pubSerialized := getTestKey() |
| line := fmt.Sprintf("%s %s user@host", pub.Type(), pubSerialized) |
| |
| authKeys := MarshalAuthorizedKey(pub) |
| actualFields := strings.Fields(string(authKeys)) |
| if len(actualFields) == 0 { |
| t.Fatalf("failed authKeys: %v", authKeys) |
| } |
| |
| // drop the comment |
| expectedFields := strings.Fields(line)[0:2] |
| |
| if !reflect.DeepEqual(actualFields, expectedFields) { |
| t.Errorf("got %v, expected %v", actualFields, expectedFields) |
| } |
| |
| actPub, _, _, _, err := ParseAuthorizedKey([]byte(line)) |
| if err != nil { |
| t.Fatalf("cannot parse %v: %v", line, err) |
| } |
| if !reflect.DeepEqual(actPub, pub) { |
| t.Errorf("got %v, expected %v", actPub, pub) |
| } |
| } |
| |
| type testAuthResult struct { |
| pubKey PublicKey |
| options []string |
| comments string |
| rest string |
| ok bool |
| } |
| |
| func testAuthorizedKeys(t *testing.T, authKeys []byte, expected []testAuthResult) { |
| rest := authKeys |
| var values []testAuthResult |
| for len(rest) > 0 { |
| var r testAuthResult |
| var err error |
| r.pubKey, r.comments, r.options, rest, err = ParseAuthorizedKey(rest) |
| r.ok = (err == nil) |
| t.Log(err) |
| r.rest = string(rest) |
| values = append(values, r) |
| } |
| |
| if !reflect.DeepEqual(values, expected) { |
| t.Errorf("got %#v, expected %#v", values, expected) |
| } |
| } |
| |
| func TestAuthorizedKeyBasic(t *testing.T) { |
| pub, pubSerialized := getTestKey() |
| line := "ssh-rsa " + pubSerialized + " user@host" |
| testAuthorizedKeys(t, []byte(line), |
| []testAuthResult{ |
| {pub, nil, "user@host", "", true}, |
| }) |
| } |
| |
| func TestAuth(t *testing.T) { |
| pub, pubSerialized := getTestKey() |
| authWithOptions := []string{ |
| `# comments to ignore before any keys...`, |
| ``, |
| `env="HOME=/home/root",no-port-forwarding ssh-rsa ` + pubSerialized + ` user@host`, |
| `# comments to ignore, along with a blank line`, |
| ``, |
| `env="HOME=/home/root2" ssh-rsa ` + pubSerialized + ` user2@host2`, |
| ``, |
| `# more comments, plus a invalid entry`, |
| `ssh-rsa data-that-will-not-parse user@host3`, |
| } |
| for _, eol := range []string{"\n", "\r\n"} { |
| authOptions := strings.Join(authWithOptions, eol) |
| rest2 := strings.Join(authWithOptions[3:], eol) |
| rest3 := strings.Join(authWithOptions[6:], eol) |
| testAuthorizedKeys(t, []byte(authOptions), []testAuthResult{ |
| {pub, []string{`env="HOME=/home/root"`, "no-port-forwarding"}, "user@host", rest2, true}, |
| {pub, []string{`env="HOME=/home/root2"`}, "user2@host2", rest3, true}, |
| {nil, nil, "", "", false}, |
| }) |
| } |
| } |
| |
| func TestAuthWithQuotedSpaceInEnv(t *testing.T) { |
| pub, pubSerialized := getTestKey() |
| authWithQuotedSpaceInEnv := []byte(`env="HOME=/home/root dir",no-port-forwarding ssh-rsa ` + pubSerialized + ` user@host`) |
| testAuthorizedKeys(t, []byte(authWithQuotedSpaceInEnv), []testAuthResult{ |
| {pub, []string{`env="HOME=/home/root dir"`, "no-port-forwarding"}, "user@host", "", true}, |
| }) |
| } |
| |
| func TestAuthWithQuotedCommaInEnv(t *testing.T) { |
| pub, pubSerialized := getTestKey() |
| authWithQuotedCommaInEnv := []byte(`env="HOME=/home/root,dir",no-port-forwarding ssh-rsa ` + pubSerialized + ` user@host`) |
| testAuthorizedKeys(t, []byte(authWithQuotedCommaInEnv), []testAuthResult{ |
| {pub, []string{`env="HOME=/home/root,dir"`, "no-port-forwarding"}, "user@host", "", true}, |
| }) |
| } |
| |
| func TestAuthWithQuotedQuoteInEnv(t *testing.T) { |
| pub, pubSerialized := getTestKey() |
| authWithQuotedQuoteInEnv := []byte(`env="HOME=/home/\"root dir",no-port-forwarding` + "\t" + `ssh-rsa` + "\t" + pubSerialized + ` user@host`) |
| authWithDoubleQuotedQuote := []byte(`no-port-forwarding,env="HOME=/home/ \"root dir\"" ssh-rsa ` + pubSerialized + "\t" + `user@host`) |
| testAuthorizedKeys(t, []byte(authWithQuotedQuoteInEnv), []testAuthResult{ |
| {pub, []string{`env="HOME=/home/\"root dir"`, "no-port-forwarding"}, "user@host", "", true}, |
| }) |
| |
| testAuthorizedKeys(t, []byte(authWithDoubleQuotedQuote), []testAuthResult{ |
| {pub, []string{"no-port-forwarding", `env="HOME=/home/ \"root dir\""`}, "user@host", "", true}, |
| }) |
| } |
| |
| func TestAuthWithInvalidSpace(t *testing.T) { |
| _, pubSerialized := getTestKey() |
| authWithInvalidSpace := []byte(`env="HOME=/home/root dir", no-port-forwarding ssh-rsa ` + pubSerialized + ` user@host |
| #more to follow but still no valid keys`) |
| testAuthorizedKeys(t, []byte(authWithInvalidSpace), []testAuthResult{ |
| {nil, nil, "", "", false}, |
| }) |
| } |
| |
| func TestAuthWithMissingQuote(t *testing.T) { |
| pub, pubSerialized := getTestKey() |
| authWithMissingQuote := []byte(`env="HOME=/home/root,no-port-forwarding ssh-rsa ` + pubSerialized + ` user@host |
| env="HOME=/home/root",shared-control ssh-rsa ` + pubSerialized + ` user@host`) |
| |
| testAuthorizedKeys(t, []byte(authWithMissingQuote), []testAuthResult{ |
| {pub, []string{`env="HOME=/home/root"`, `shared-control`}, "user@host", "", true}, |
| }) |
| } |
| |
| func TestInvalidEntry(t *testing.T) { |
| authInvalid := []byte(`ssh-rsa`) |
| _, _, _, _, err := ParseAuthorizedKey(authInvalid) |
| if err == nil { |
| t.Errorf("got valid entry for %q", authInvalid) |
| } |
| } |
| |
| var knownHostsParseTests = []struct { |
| input string |
| err string |
| |
| marker string |
| comment string |
| hosts []string |
| rest string |
| }{ |
| { |
| "", |
| "EOF", |
| |
| "", "", nil, "", |
| }, |
| { |
| "# Just a comment", |
| "EOF", |
| |
| "", "", nil, "", |
| }, |
| { |
| " \t ", |
| "EOF", |
| |
| "", "", nil, "", |
| }, |
| { |
| "localhost ssh-rsa {RSAPUB}", |
| "", |
| |
| "", "", []string{"localhost"}, "", |
| }, |
| { |
| "localhost\tssh-rsa {RSAPUB}", |
| "", |
| |
| "", "", []string{"localhost"}, "", |
| }, |
| { |
| "localhost\tssh-rsa {RSAPUB}\tcomment comment", |
| "", |
| |
| "", "comment comment", []string{"localhost"}, "", |
| }, |
| { |
| "localhost\tssh-rsa {RSAPUB}\tcomment comment\n", |
| "", |
| |
| "", "comment comment", []string{"localhost"}, "", |
| }, |
| { |
| "localhost\tssh-rsa {RSAPUB}\tcomment comment\r\n", |
| "", |
| |
| "", "comment comment", []string{"localhost"}, "", |
| }, |
| { |
| "localhost\tssh-rsa {RSAPUB}\tcomment comment\r\nnext line", |
| "", |
| |
| "", "comment comment", []string{"localhost"}, "next line", |
| }, |
| { |
| "localhost,[host2:123]\tssh-rsa {RSAPUB}\tcomment comment", |
| "", |
| |
| "", "comment comment", []string{"localhost", "[host2:123]"}, "", |
| }, |
| { |
| "@marker \tlocalhost,[host2:123]\tssh-rsa {RSAPUB}", |
| "", |
| |
| "marker", "", []string{"localhost", "[host2:123]"}, "", |
| }, |
| { |
| "@marker \tlocalhost,[host2:123]\tssh-rsa aabbccdd", |
| "short read", |
| |
| "", "", nil, "", |
| }, |
| } |
| |
| func TestKnownHostsParsing(t *testing.T) { |
| rsaPub, rsaPubSerialized := getTestKey() |
| |
| for i, test := range knownHostsParseTests { |
| var expectedKey PublicKey |
| const rsaKeyToken = "{RSAPUB}" |
| |
| input := test.input |
| if strings.Contains(input, rsaKeyToken) { |
| expectedKey = rsaPub |
| input = strings.Replace(test.input, rsaKeyToken, rsaPubSerialized, -1) |
| } |
| |
| marker, hosts, pubKey, comment, rest, err := ParseKnownHosts([]byte(input)) |
| if err != nil { |
| if len(test.err) == 0 { |
| t.Errorf("#%d: unexpectedly failed with %q", i, err) |
| } else if !strings.Contains(err.Error(), test.err) { |
| t.Errorf("#%d: expected error containing %q, but got %q", i, test.err, err) |
| } |
| continue |
| } else if len(test.err) != 0 { |
| t.Errorf("#%d: succeeded but expected error including %q", i, test.err) |
| continue |
| } |
| |
| if !reflect.DeepEqual(expectedKey, pubKey) { |
| t.Errorf("#%d: expected key %#v, but got %#v", i, expectedKey, pubKey) |
| } |
| |
| if marker != test.marker { |
| t.Errorf("#%d: expected marker %q, but got %q", i, test.marker, marker) |
| } |
| |
| if comment != test.comment { |
| t.Errorf("#%d: expected comment %q, but got %q", i, test.comment, comment) |
| } |
| |
| if !reflect.DeepEqual(test.hosts, hosts) { |
| t.Errorf("#%d: expected hosts %#v, but got %#v", i, test.hosts, hosts) |
| } |
| |
| if rest := string(rest); rest != test.rest { |
| t.Errorf("#%d: expected remaining input to be %q, but got %q", i, test.rest, rest) |
| } |
| } |
| } |
| |
| func TestFingerprintLegacyMD5(t *testing.T) { |
| pub, _ := getTestKey() |
| fingerprint := FingerprintLegacyMD5(pub) |
| want := "fb:61:6d:1a:e3:f0:95:45:3c:a0:79:be:4a:93:63:66" // ssh-keygen -lf -E md5 rsa |
| if fingerprint != want { |
| t.Errorf("got fingerprint %q want %q", fingerprint, want) |
| } |
| } |
| |
| func TestFingerprintSHA256(t *testing.T) { |
| pub, _ := getTestKey() |
| fingerprint := FingerprintSHA256(pub) |
| want := "SHA256:Anr3LjZK8YVpjrxu79myrW9Hrb/wpcMNpVvTq/RcBm8" // ssh-keygen -lf rsa |
| if fingerprint != want { |
| t.Errorf("got fingerprint %q want %q", fingerprint, want) |
| } |
| } |
| |
| func TestInvalidKeys(t *testing.T) { |
| keyTypes := []string{ |
| "RSA PRIVATE KEY", |
| "PRIVATE KEY", |
| "EC PRIVATE KEY", |
| "DSA PRIVATE KEY", |
| "OPENSSH PRIVATE KEY", |
| } |
| |
| for _, keyType := range keyTypes { |
| for _, dataLen := range []int{0, 1, 2, 5, 10, 20} { |
| data := make([]byte, dataLen) |
| if _, err := io.ReadFull(rand.Reader, data); err != nil { |
| t.Fatal(err) |
| } |
| |
| var buf bytes.Buffer |
| pem.Encode(&buf, &pem.Block{ |
| Type: keyType, |
| Bytes: data, |
| }) |
| |
| // This test is just to ensure that the function |
| // doesn't panic so the return value is ignored. |
| ParseRawPrivateKey(buf.Bytes()) |
| } |
| } |
| } |
| |
| func TestSKKeys(t *testing.T) { |
| for _, d := range testdata.SKData { |
| pk, _, _, _, err := ParseAuthorizedKey(d.PubKey) |
| if err != nil { |
| t.Fatalf("parseAuthorizedKey returned error: %v", err) |
| } |
| |
| sigBuf := make([]byte, hex.DecodedLen(len(d.HexSignature))) |
| if _, err := hex.Decode(sigBuf, d.HexSignature); err != nil { |
| t.Fatalf("hex.Decode() failed: %v", err) |
| } |
| |
| dataBuf := make([]byte, hex.DecodedLen(len(d.HexData))) |
| if _, err := hex.Decode(dataBuf, d.HexData); err != nil { |
| t.Fatalf("hex.Decode() failed: %v", err) |
| } |
| |
| sig, _, ok := parseSignature(sigBuf) |
| if !ok { |
| t.Fatalf("parseSignature(%v) failed", sigBuf) |
| } |
| |
| // Test that good data and signature pass verification |
| if err := pk.Verify(dataBuf, sig); err != nil { |
| t.Errorf("%s: PublicKey.Verify(%v, %v) failed: %v", d.Name, dataBuf, sig, err) |
| } |
| |
| // Invalid data being passed in |
| invalidData := []byte("INVALID DATA") |
| if err := pk.Verify(invalidData, sig); err == nil { |
| t.Errorf("%s with invalid data: PublicKey.Verify(%v, %v) passed unexpectedly", d.Name, invalidData, sig) |
| } |
| |
| // Change byte in blob to corrup signature |
| sig.Blob[5] = byte('A') |
| // Corrupted data being passed in |
| if err := pk.Verify(dataBuf, sig); err == nil { |
| t.Errorf("%s with corrupted signature: PublicKey.Verify(%v, %v) passed unexpectedly", d.Name, dataBuf, sig) |
| } |
| } |
| } |
