AP REP

messages/APRep.go

@@ -1 +1,57 @@
 package messages
+
+import (
+	"encoding/asn1"
+	"fmt"
+	"github.com/jcmturner/gokrb5/types"
+	"github.com/jcmturner/gokrb5/types/asnAppTag"
+	"time"
+)
+
+/*
+AP-REP          ::= [APPLICATION 15] SEQUENCE {
+pvno            [0] INTEGER (5),
+msg-type        [1] INTEGER (15),
+enc-part        [2] EncryptedData -- EncAPRepPart
+}
+
+EncAPRepPart    ::= [APPLICATION 27] SEQUENCE {
+        ctime           [0] KerberosTime,
+        cusec           [1] Microseconds,
+        subkey          [2] EncryptionKey OPTIONAL,
+        seq-number      [3] UInt32 OPTIONAL
+}
+*/
+
+type APRep struct {
+	PVNO    int                 `asn1:"explicit,tag:0"`
+	MsgType int                 `asn1:"explicit,tag:1"`
+	EncPart types.EncryptedData `asn1:"explicit,tag:2"`
+}
+
+type EncAPRepPart struct {
+	CTime          time.Time           `asn1:"explicit,tag:0"`
+	Cusec          int                 `asn1:"explicit,tag:1"`
+	Subkey         types.EncryptionKey `asn1:"optional,explicit,tag:2"`
+	SequenceNumber int                 `asn1:"optional,explicit,tag:3"`
+}
+
+func (a *APRep) Unmarshal(b []byte) error {
+	_, err := asn1.UnmarshalWithParams(b, a, fmt.Sprintf("application,explicit,tag:%v", asnAppTag.APREP))
+	if err != nil {
+		return err
+	}
+	expectedMsgType := types.KrbDictionary.MsgTypesByName["KRB_AP_REP"]
+	if a.MsgType != expectedMsgType {
+		return fmt.Errorf("Message ID does not indicate a KRB_AP_REP. Expected: %v; Actual: %v", expectedMsgType, a.MsgType)
+	}
+	return nil
+}
+
+func (a *EncAPRepPart) Unmarshal(b []byte) error {
+	_, err := asn1.UnmarshalWithParams(b, a, fmt.Sprintf("application,explicit,tag:%v", asnAppTag.EncAPRepPart))
+	if err != nil {
+		return err
+	}
+	return nil
+}

messages/APRep_test.go

@@ -0,0 +1,68 @@
+package messages
+
+import (
+	"encoding/hex"
+	"github.com/stretchr/testify/assert"
+	"github.com/jcmturner/gokrb5/testdata"
+	"testing"
+	"github.com/jcmturner/gokrb5/types"
+	"time"
+)
+
+
+func TestUnmarshalAPRep(t *testing.T) {
+	var a APRep
+	v := "encode_krb5_ap_rep"
+	b, err := hex.DecodeString(testdata.TestVectors[v])
+	if err != nil {
+		t.Fatalf("Test vector read error of %s: %v\n", v, err)
+	}
+	err = a.Unmarshal(b)
+	if err != nil {
+		t.Fatalf("Unmarshal error of %s: %v\n", v, err)
+	}
+	assert.Equal(t, testdata.TEST_KVNO, a.PVNO, "PVNO not as expected")
+	assert.Equal(t, types.KrbDictionary.MsgTypesByName["KRB_AP_REP"], a.MsgType, "MsgType is not as expected")
+	assert.Equal(t, testdata.TEST_ETYPE, a.EncPart.EType, "Ticket encPart etype not as expected")
+	assert.Equal(t, testdata.TEST_KVNO, a.EncPart.KVNO, "Ticket encPart KVNO not as expected")
+	assert.Equal(t, []byte(testdata.TEST_CIPHERTEXT), a.EncPart.Cipher, "Ticket encPart cipher not as expected")
+}
+
+func TestUnmarshalEncAPRepPart(t *testing.T) {
+	var a EncAPRepPart
+	v := "encode_krb5_ap_rep_enc_part"
+	b, err := hex.DecodeString(testdata.TestVectors[v])
+	if err != nil {
+		t.Fatalf("Test vector read error of %s: %v\n", v, err)
+	}
+	err = a.Unmarshal(b)
+	if err != nil {
+		t.Fatalf("Unmarshal error of %s: %v\n", v, err)
+	}
+	//Parse the test time value into a time.Time type
+	tt, _ := time.Parse(testdata.TEST_TIME_FORMAT, testdata.TEST_TIME)
+
+	assert.Equal(t, tt, a.CTime, "CTime not as expected")
+	assert.Equal(t, 123456, a.Cusec, "Client microseconds not as expected")
+	assert.Equal(t, 1, a.Subkey.KeyType, "Subkey type not as expected")
+	assert.Equal(t, []byte("12345678"), a.Subkey.KeyValue, "Subkey value not as expected")
+	assert.Equal(t, 17, a.SequenceNumber, "Sequence number not as expected")
+}
+
+func TestUnmarshalEncAPRepPart_optionalsNULL(t *testing.T) {
+	var a EncAPRepPart
+	v := "encode_krb5_ap_rep_enc_part(optionalsNULL)"
+	b, err := hex.DecodeString(testdata.TestVectors[v])
+	if err != nil {
+		t.Fatalf("Test vector read error of %s: %v\n", v, err)
+	}
+	err = a.Unmarshal(b)
+	if err != nil {
+		t.Fatalf("Unmarshal error of %s: %v\n", v, err)
+	}
+	//Parse the test time value into a time.Time type
+	tt, _ := time.Parse(testdata.TEST_TIME_FORMAT, testdata.TEST_TIME)
+
+	assert.Equal(t, tt, a.CTime, "CTime not as expected")
+	assert.Equal(t, 123456, a.Cusec, "Client microseconds not as expected")
+}

testdata/test_vectors.go

@@ -34,9 +34,9 @@ var TestVectors = map[string]string{
 	"encode_krb5_tgs_rep":                                        "6D81EA3081E7A003020105A10302010DA22630243010A10302010DA209040770612D646174613010A10302010DA209040770612D64617461A3101B0E415448454E412E4D49542E454455A41A3018A003020101A111300F1B066866747361691B056578747261A55E615C305AA003020105A1101B0E415448454E412E4D49542E454455A21A3018A003020101A111300F1B066866747361691B056578747261A3253023A003020100A103020105A21704156B726241534E2E312074657374206D657373616765A6253023A003020100A103020105A21704156B726241534E2E312074657374206D657373616765",
 	"encode_krb5_tgs_rep(optionalsNULL)":                         "6D81C23081BFA003020105A10302010DA3101B0E415448454E412E4D49542E454455A41A3018A003020101A111300F1B066866747361691B056578747261A55E615C305AA003020105A1101B0E415448454E412E4D49542E454455A21A3018A003020101A111300F1B066866747361691B056578747261A3253023A003020100A103020105A21704156B726241534E2E312074657374206D657373616765A6253023A003020100A103020105A21704156B726241534E2E312074657374206D657373616765",
 	"encode_krb5_ap_req":                                         "6E819D30819AA003020105A10302010EA207030500FEDCBA98A35E615C305AA003020105A1101B0E415448454E412E4D49542E454455A21A3018A003020101A111300F1B066866747361691B056578747261A3253023A003020100A103020105A21704156B726241534E2E312074657374206D657373616765A4253023A003020100A103020105A21704156B726241534E2E312074657374206D657373616765",
-	//"encode_krb5_ap_rep":                                         "6F333031A003020105A10302010FA2253023A003020100A103020105A21704156B726241534E2E312074657374206D657373616765",
-	//"encode_krb5_ap_rep_enc_part":                                "7B363034A011180F31393934303631303036303331375AA105020301E240A2133011A003020101A10A04083132333435363738A303020111",
-	//"encode_krb5_ap_rep_enc_part(optionalsNULL)":                 "7B1C301AA011180F31393934303631303036303331375AA105020301E240",
+	"encode_krb5_ap_rep":                                         "6F333031A003020105A10302010FA2253023A003020100A103020105A21704156B726241534E2E312074657374206D657373616765",
+	"encode_krb5_ap_rep_enc_part":                                "7B363034A011180F31393934303631303036303331375AA105020301E240A2133011A003020101A10A04083132333435363738A303020111",
+	"encode_krb5_ap_rep_enc_part(optionalsNULL)":                 "7B1C301AA011180F31393934303631303036303331375AA105020301E240",
 	"encode_krb5_as_req":                                         "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",
 	"encode_krb5_as_req(optionalsNULLexceptsecond_ticket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
 	"encode_krb5_as_req(optionalsNULLexceptserver)":              "6A693067A103020105A20302010AA45B3059A007030500FEDCBA90A2101B0E415448454E412E4D49542E454455A31A3018A003020101A111300F1B066866747361691B056578747261A511180F31393934303631303036303331375AA70302012AA8083006020100020101",