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196 lines
7.4 KiB
Go
196 lines
7.4 KiB
Go
package ber
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import (
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"math"
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"testing"
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)
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var errEOF = io.ErrUnexpectedEOF.Error()
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// Tests from http://www.strozhevsky.com/free_docs/free_asn1_testsuite_descr.pdf
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// Source files and descriptions at http://www.strozhevsky.com/free_docs/TEST_SUITE.zip
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var testcases = []struct {
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// File contains the path to the BER-encoded file
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File string
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// Error indicates whether a decoding error is expected
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Error string
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// AbnormalEncoding indicates whether a normalized re-encoding is expected to differ from the original source
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AbnormalEncoding bool
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// IndefiniteEncoding indicates the source file used indefinite-length encoding, so the re-encoding is expected to differ (since the length is known)
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IndefiniteEncoding bool
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}{
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// Common blocks
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{File: "tests/tc1.ber", Error: "high-tag-number tag overflow"},
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{File: "tests/tc2.ber", Error: errEOF},
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{File: "tests/tc3.ber", Error: errEOF},
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{File: "tests/tc4.ber", Error: "invalid length byte 0xff"},
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{File: "tests/tc5.ber", Error: "", AbnormalEncoding: true},
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// Real numbers (some expected failures are disabled until support is added)
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{File: "tests/tc6.ber", Error: ""}, // Error: "REAL value +0 must be encoded with zero-length value block"},
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{File: "tests/tc7.ber", Error: ""}, // Error: "REAL value -0 must be encoded as a special value"},
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{File: "tests/tc8.ber", Error: ""},
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{File: "tests/tc9.ber", Error: ""}, // Error: "Bits 6 and 5 of information octet for REAL are equal to 11"
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{File: "tests/tc10.ber", Error: ""},
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{File: "tests/tc11.ber", Error: ""}, // Error: "Incorrect NR form"
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{File: "tests/tc12.ber", Error: ""}, // Error: "Encoding of "special value" not from ASN.1 standard"
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{File: "tests/tc13.ber", Error: errEOF},
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{File: "tests/tc14.ber", Error: errEOF},
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{File: "tests/tc15.ber", Error: ""}, // Error: "Too big value of exponent"
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{File: "tests/tc16.ber", Error: ""}, // Error: "Too big value of mantissa"
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{File: "tests/tc17.ber", Error: ""}, // Error: "Too big values for exponent and mantissa + using of "scaling factor" value"
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// Integers
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{File: "tests/tc18.ber", Error: ""},
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{File: "tests/tc19.ber", Error: errEOF},
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{File: "tests/tc20.ber", Error: ""},
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// Object identifiers
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{File: "tests/tc21.ber", Error: ""},
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{File: "tests/tc22.ber", Error: ""},
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{File: "tests/tc23.ber", Error: errEOF},
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{File: "tests/tc24.ber", Error: ""},
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// Booleans
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{File: "tests/tc25.ber", Error: ""},
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{File: "tests/tc26.ber", Error: ""},
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{File: "tests/tc27.ber", Error: errEOF},
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{File: "tests/tc28.ber", Error: ""},
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{File: "tests/tc29.ber", Error: ""},
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// Null
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{File: "tests/tc30.ber", Error: ""},
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{File: "tests/tc31.ber", Error: errEOF},
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{File: "tests/tc32.ber", Error: ""},
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// Bitstring (some expected failures are disabled until support is added)
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{File: "tests/tc33.ber", Error: ""}, // Error: "Too big value for "unused bits""
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{File: "tests/tc34.ber", Error: errEOF},
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{File: "tests/tc35.ber", Error: "", IndefiniteEncoding: true}, // Error: "Using of different from BIT STRING types as internal types for constructive encoding"
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{File: "tests/tc36.ber", Error: "", IndefiniteEncoding: true}, // Error: "Using of "unused bits" in internal BIT STRINGs with constructive form of encoding"
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{File: "tests/tc37.ber", Error: ""},
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{File: "tests/tc38.ber", Error: "", IndefiniteEncoding: true},
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{File: "tests/tc39.ber", Error: ""},
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{File: "tests/tc40.ber", Error: ""},
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// Octet string (some expected failures are disabled until support is added)
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{File: "tests/tc41.ber", Error: "", IndefiniteEncoding: true}, // Error: "Using of different from OCTET STRING types as internal types for constructive encoding"
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{File: "tests/tc42.ber", Error: errEOF},
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{File: "tests/tc43.ber", Error: errEOF},
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{File: "tests/tc44.ber", Error: ""},
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{File: "tests/tc45.ber", Error: ""},
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// Bitstring
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{File: "tests/tc46.ber", Error: "indefinite length used with primitive type"},
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{File: "tests/tc47.ber", Error: "eoc child not allowed with definite length"},
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{File: "tests/tc48.ber", Error: "", IndefiniteEncoding: true}, // Error: "Using of more than 7 "unused bits" in BIT STRING with constrictive encoding form"
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{File: "tests/tc49.ber", Error: ""},
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{File: "tests/tc50.ber", Error: is64bit("length cannot be less than -1", "long-form length overflow")},
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{File: "tests/tc51.ber", Error: is64bit(fmt.Sprintf("length 206966894640 greater than maximum %v", MaxPacketLengthBytes), "long-form length overflow")},
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}
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func is64bit(a, b string) string {
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maxInt64 := int64(math.MaxInt64)
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length := int(maxInt64)
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if int64(length) != maxInt64 {
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return b
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}
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return a
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}
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func TestSuiteDecodePacket(t *testing.T) {
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// Debug = true
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for _, tc := range testcases {
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file := tc.File
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dataIn, err := ioutil.ReadFile(file)
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if err != nil {
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t.Errorf("%s: %v", file, err)
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continue
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}
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// fmt.Printf("%s: decode %d\n", file, len(dataIn))
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packet, err := DecodePacketErr(dataIn)
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if err != nil {
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if tc.Error == "" {
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t.Errorf("%s: unexpected error during DecodePacket: %v", file, err)
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} else if tc.Error != err.Error() {
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t.Errorf("%s: expected error %q during DecodePacket, got %q", file, tc.Error, err)
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}
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continue
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}
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if tc.Error != "" {
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t.Errorf("%s: expected error %q, got none", file, tc.Error)
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continue
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}
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dataOut := packet.Bytes()
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if tc.AbnormalEncoding || tc.IndefiniteEncoding {
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// Abnormal encodings and encodings that used indefinite length should re-encode differently
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if bytes.Equal(dataOut, dataIn) {
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t.Errorf("%s: data should have been re-encoded differently", file)
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}
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} else if !bytes.Equal(dataOut, dataIn) {
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// Make sure the serialized data matches the source
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t.Errorf("%s: data should be the same\nwant: %#v\ngot: %#v", file, dataIn, dataOut)
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}
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packet, err = DecodePacketErr(dataOut)
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if err != nil {
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t.Errorf("%s: unexpected error: %v", file, err)
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continue
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}
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// Make sure the re-serialized data matches our original serialization
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dataOut2 := packet.Bytes()
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if !bytes.Equal(dataOut, dataOut2) {
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t.Errorf("%s: data should be the same\nwant: %#v\ngot: %#v", file, dataOut, dataOut2)
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}
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}
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}
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func TestSuiteReadPacket(t *testing.T) {
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for _, tc := range testcases {
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file := tc.File
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dataIn, err := ioutil.ReadFile(file)
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if err != nil {
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t.Errorf("%s: %v", file, err)
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continue
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}
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buffer := bytes.NewBuffer(dataIn)
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packet, err := ReadPacket(buffer)
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if err != nil {
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if tc.Error == "" {
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t.Errorf("%s: unexpected error during ReadPacket: %v", file, err)
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} else if tc.Error != err.Error() {
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t.Errorf("%s: expected error %q during ReadPacket, got %q", file, tc.Error, err)
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}
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continue
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}
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if tc.Error != "" {
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t.Errorf("%s: expected error %q, got none", file, tc.Error)
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continue
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}
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dataOut := packet.Bytes()
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if tc.AbnormalEncoding || tc.IndefiniteEncoding {
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// Abnormal encodings and encodings that used indefinite length should re-encode differently
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if bytes.Equal(dataOut, dataIn) {
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t.Errorf("%s: data should have been re-encoded differently", file)
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}
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} else if !bytes.Equal(dataOut, dataIn) {
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// Make sure the serialized data matches the source
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t.Errorf("%s: data should be the same\nwant: %#v\ngot: %#v", file, dataIn, dataOut)
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}
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packet, err = DecodePacketErr(dataOut)
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if err != nil {
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t.Errorf("%s: unexpected error: %v", file, err)
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continue
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}
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// Make sure the re-serialized data matches our original serialization
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dataOut2 := packet.Bytes()
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if !bytes.Equal(dataOut, dataOut2) {
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t.Errorf("%s: data should be the same\nwant: %#v\ngot: %#v", file, dataOut, dataOut2)
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}
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}
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}
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