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gunzip_test.go
// Copyright 2009 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 gzip import ( "bytes" "compress/flate" "encoding/base64" "io" "os" "strings" "testing" "time" ) type gunzipTest struct { name string desc string raw string gzip []byte err error } var gunzipTests = []gunzipTest{ { // has 1 empty fixed-huffman block "empty.txt", "empty.txt", "", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0xf7, 0x5e, 0x14, 0x4a, 0x00, 0x03, 0x65, 0x6d, 0x70, 0x74, 0x79, 0x2e, 0x74, 0x78, 0x74, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }, nil, }, { "", "empty - with no file name", "", []byte{ 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x00, 0xff, 0x01, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }, nil, }, { // has 1 non-empty fixed huffman block "hello.txt", "hello.txt", "hello world\n", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a, 0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1, 0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00, 0x00, 0x00, }, nil, }, { // concatenation "hello.txt", "hello.txt x2", "hello world\n" + "hello world\n", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a, 0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1, 0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00, 0x00, 0x00, 0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a, 0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1, 0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00, 0x00, 0x00, }, nil, }, { // has a fixed huffman block with some length-distance pairs "shesells.txt", "shesells.txt", "she sells seashells by the seashore\n", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0x72, 0x66, 0x8b, 0x4a, 0x00, 0x03, 0x73, 0x68, 0x65, 0x73, 0x65, 0x6c, 0x6c, 0x73, 0x2e, 0x74, 0x78, 0x74, 0x00, 0x2b, 0xce, 0x48, 0x55, 0x28, 0x4e, 0xcd, 0xc9, 0x29, 0x06, 0x92, 0x89, 0xc5, 0x19, 0x60, 0x56, 0x52, 0xa5, 0x42, 0x09, 0x58, 0x18, 0x28, 0x90, 0x5f, 0x94, 0xca, 0x05, 0x00, 0x76, 0xb0, 0x3b, 0xeb, 0x24, 0x00, 0x00, 0x00, }, nil, }, { // has dynamic huffman blocks "gettysburg", "gettysburg", " Four score and seven years ago our fathers brought forth on\n" + "this continent, a new nation, conceived in Liberty, and dedicated\n" + "to the proposition that all men are created equal.\n" + " Now we are engaged in a great Civil War, testing whether that\n" + "nation, or any nation so conceived and so dedicated, can long\n" + "endure.\n" + " We are met on a great battle-field of that war.\n" + " We have come to dedicate a portion of that field, as a final\n" + "resting place for those who here gave their lives that that\n" + "nation might live. It is altogether fitting and proper that\n" + "we should do this.\n" + " But, in a larger sense, we can not dedicate — we can not\n" + "consecrate — we can not hallow — this ground.\n" + " The brave men, living and dead, who struggled here, have\n" + "consecrated it, far above our poor power to add or detract.\n" + "The world will little note, nor long remember what we say here,\n" + "but it can never forget what they did here.\n" + " It is for us the living, rather, to be dedicated here to the\n" + "unfinished work which they who fought here have thus far so\n" + "nobly advanced. It is rather for us to be here dedicated to\n" + "the great task remaining before us — that from these honored\n" + "dead we take increased devotion to that cause for which they\n" + "gave the last full measure of devotion —\n" + " that we here highly resolve that these dead shall not have\n" + "died in vain — that this nation, under God, shall have a new\n" + "birth of freedom — and that government of the people, by the\n" + "people, for the people, shall not perish from this earth.\n" + "\n" + "Abraham Lincoln, November 19, 1863, Gettysburg, Pennsylvania\n", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0xd1, 0x12, 0x2b, 0x4a, 0x00, 0x03, 0x67, 0x65, 0x74, 0x74, 0x79, 0x73, 0x62, 0x75, 0x72, 0x67, 0x00, 0x65, 0x54, 0xcd, 0x6e, 0xd4, 0x30, 0x10, 0xbe, 0xfb, 0x29, 0xe6, 0x01, 0x42, 0xa5, 0x0a, 0x09, 0xc1, 0x11, 0x90, 0x40, 0x48, 0xa8, 0xe2, 0x80, 0xd4, 0xf3, 0x24, 0x9e, 0x24, 0x56, 0xbd, 0x9e, 0xc5, 0x76, 0x76, 0x95, 0x1b, 0x0f, 0xc1, 0x13, 0xf2, 0x24, 0x7c, 0x63, 0x77, 0x9b, 0x4a, 0x5c, 0xaa, 0x6e, 0x6c, 0xcf, 0x7c, 0x7f, 0x33, 0x44, 0x5f, 0x74, 0xcb, 0x54, 0x26, 0xcd, 0x42, 0x9c, 0x3c, 0x15, 0xb9, 0x48, 0xa2, 0x5d, 0x38, 0x17, 0xe2, 0x45, 0xc9, 0x4e, 0x67, 0xae, 0xab, 0xe0, 0xf7, 0x98, 0x75, 0x5b, 0xd6, 0x4a, 0xb3, 0xe6, 0xba, 0x92, 0x26, 0x57, 0xd7, 0x50, 0x68, 0xd2, 0x54, 0x43, 0x92, 0x54, 0x07, 0x62, 0x4a, 0x72, 0xa5, 0xc4, 0x35, 0x68, 0x1a, 0xec, 0x60, 0x92, 0x70, 0x11, 0x4f, 0x21, 0xd1, 0xf7, 0x30, 0x4a, 0xae, 0xfb, 0xd0, 0x9a, 0x78, 0xf1, 0x61, 0xe2, 0x2a, 0xde, 0x55, 0x25, 0xd4, 0xa6, 0x73, 0xd6, 0xb3, 0x96, 0x60, 0xef, 0xf0, 0x9b, 0x2b, 0x71, 0x8c, 0x74, 0x02, 0x10, 0x06, 0xac, 0x29, 0x8b, 0xdd, 0x25, 0xf9, 0xb5, 0x71, 0xbc, 0x73, 0x44, 0x0f, 0x7a, 0xa5, 0xab, 0xb4, 0x33, 0x49, 0x0b, 0x2f, 0xbd, 0x03, 0xd3, 0x62, 0x17, 0xe9, 0x73, 0xb8, 0x84, 0x48, 0x8f, 0x9c, 0x07, 0xaa, 0x52, 0x00, 0x6d, 0xa1, 0xeb, 0x2a, 0xc6, 0xa0, 0x95, 0x76, 0x37, 0x78, 0x9a, 0x81, 0x65, 0x7f, 0x46, 0x4b, 0x45, 0x5f, 0xe1, 0x6d, 0x42, 0xe8, 0x01, 0x13, 0x5c, 0x38, 0x51, 0xd4, 0xb4, 0x38, 0x49, 0x7e, 0xcb, 0x62, 0x28, 0x1e, 0x3b, 0x82, 0x93, 0x54, 0x48, 0xf1, 0xd2, 0x7d, 0xe4, 0x5a, 0xa3, 0xbc, 0x99, 0x83, 0x44, 0x4f, 0x3a, 0x77, 0x36, 0x57, 0xce, 0xcf, 0x2f, 0x56, 0xbe, 0x80, 0x90, 0x9e, 0x84, 0xea, 0x51, 0x1f, 0x8f, 0xcf, 0x90, 0xd4, 0x60, 0xdc, 0x5e, 0xb4, 0xf7, 0x10, 0x0b, 0x26, 0xe0, 0xff, 0xc4, 0xd1, 0xe5, 0x67, 0x2e, 0xe7, 0xc8, 0x93, 0x98, 0x05, 0xb8, 0xa8, 0x45, 0xc0, 0x4d, 0x09, 0xdc, 0x84, 0x16, 0x2b, 0x0d, 0x9a, 0x21, 0x53, 0x04, 0x8b, 0xd2, 0x0b, 0xbd, 0xa2, 0x4c, 0xa7, 0x60, 0xee, 0xd9, 0xe1, 0x1d, 0xd1, 0xb7, 0x4a, 0x30, 0x8f, 0x63, 0xd5, 0xa5, 0x8b, 0x33, 0x87, 0xda, 0x1a, 0x18, 0x79, 0xf3, 0xe3, 0xa6, 0x17, 0x94, 0x2e, 0xab, 0x6e, 0xa0, 0xe3, 0xcd, 0xac, 0x50, 0x8c, 0xca, 0xa7, 0x0d, 0x76, 0x37, 0xd1, 0x23, 0xe7, 0x05, 0x57, 0x8b, 0xa4, 0x22, 0x83, 0xd9, 0x62, 0x52, 0x25, 0xad, 0x07, 0xbb, 0xbf, 0xbf, 0xff, 0xbc, 0xfa, 0xee, 0x20, 0x73, 0x91, 0x29, 0xff, 0x7f, 0x02, 0x71, 0x62, 0x84, 0xb5, 0xf6, 0xb5, 0x25, 0x6b, 0x41, 0xde, 0x92, 0xb7, 0x76, 0x3f, 0x91, 0x91, 0x31, 0x1b, 0x41, 0x84, 0x62, 0x30, 0x0a, 0x37, 0xa4, 0x5e, 0x18, 0x3a, 0x99, 0x08, 0xa5, 0xe6, 0x6d, 0x59, 0x22, 0xec, 0x33, 0x39, 0x86, 0x26, 0xf5, 0xab, 0x66, 0xc8, 0x08, 0x20, 0xcf, 0x0c, 0xd7, 0x47, 0x45, 0x21, 0x0b, 0xf6, 0x59, 0xd5, 0xfe, 0x5c, 0x8d, 0xaa, 0x12, 0x7b, 0x6f, 0xa1, 0xf0, 0x52, 0x33, 0x4f, 0xf5, 0xce, 0x59, 0xd3, 0xab, 0x66, 0x10, 0xbf, 0x06, 0xc4, 0x31, 0x06, 0x73, 0xd6, 0x80, 0xa2, 0x78, 0xc2, 0x45, 0xcb, 0x03, 0x65, 0x39, 0xc9, 0x09, 0xd1, 0x06, 0x04, 0x33, 0x1a, 0x5a, 0xf1, 0xde, 0x01, 0xb8, 0x71, 0x83, 0xc4, 0xb5, 0xb3, 0xc3, 0x54, 0x65, 0x33, 0x0d, 0x5a, 0xf7, 0x9b, 0x90, 0x7c, 0x27, 0x1f, 0x3a, 0x58, 0xa3, 0xd8, 0xfd, 0x30, 0x5f, 0xb7, 0xd2, 0x66, 0xa2, 0x93, 0x1c, 0x28, 0xb7, 0xe9, 0x1b, 0x0c, 0xe1, 0x28, 0x47, 0x26, 0xbb, 0xe9, 0x7d, 0x7e, 0xdc, 0x96, 0x10, 0x92, 0x50, 0x56, 0x7c, 0x06, 0xe2, 0x27, 0xb4, 0x08, 0xd3, 0xda, 0x7b, 0x98, 0x34, 0x73, 0x9f, 0xdb, 0xf6, 0x62, 0xed, 0x31, 0x41, 0x13, 0xd3, 0xa2, 0xa8, 0x4b, 0x3a, 0xc6, 0x1d, 0xe4, 0x2f, 0x8c, 0xf8, 0xfb, 0x97, 0x64, 0xf4, 0xb6, 0x2f, 0x80, 0x5a, 0xf3, 0x56, 0xe0, 0x40, 0x50, 0xd5, 0x19, 0xd0, 0x1e, 0xfc, 0xca, 0xe5, 0xc9, 0xd4, 0x60, 0x00, 0x81, 0x2e, 0xa3, 0xcc, 0xb6, 0x52, 0xf0, 0xb4, 0xdb, 0x69, 0x99, 0xce, 0x7a, 0x32, 0x4c, 0x08, 0xed, 0xaa, 0x10, 0x10, 0xe3, 0x6f, 0xee, 0x99, 0x68, 0x95, 0x9f, 0x04, 0x71, 0xb2, 0x49, 0x2f, 0x62, 0xa6, 0x5e, 0xb4, 0xef, 0x02, 0xed, 0x4f, 0x27, 0xde, 0x4a, 0x0f, 0xfd, 0xc1, 0xcc, 0xdd, 0x02, 0x8f, 0x08, 0x16, 0x54, 0xdf, 0xda, 0xca, 0xe0, 0x82, 0xf1, 0xb4, 0x31, 0x7a, 0xa9, 0x81, 0xfe, 0x90, 0xb7, 0x3e, 0xdb, 0xd3, 0x35, 0xc0, 0x20, 0x80, 0x33, 0x46, 0x4a, 0x63, 0xab, 0xd1, 0x0d, 0x29, 0xd2, 0xe2, 0x84, 0xb8, 0xdb, 0xfa, 0xe9, 0x89, 0x44, 0x86, 0x7c, 0xe8, 0x0b, 0xe6, 0x02, 0x6a, 0x07, 0x9b, 0x96, 0xd0, 0xdb, 0x2e, 0x41, 0x4c, 0xa1, 0xd5, 0x57, 0x45, 0x14, 0xfb, 0xe3, 0xa6, 0x72, 0x5b, 0x87, 0x6e, 0x0c, 0x6d, 0x5b, 0xce, 0xe0, 0x2f, 0xe2, 0x21, 0x81, 0x95, 0xb0, 0xe8, 0xb6, 0x32, 0x0b, 0xb2, 0x98, 0x13, 0x52, 0x5d, 0xfb, 0xec, 0x63, 0x17, 0x8a, 0x9e, 0x23, 0x22, 0x36, 0xee, 0xcd, 0xda, 0xdb, 0xcf, 0x3e, 0xf1, 0xc7, 0xf1, 0x01, 0x12, 0x93, 0x0a, 0xeb, 0x6f, 0xf2, 0x02, 0x15, 0x96, 0x77, 0x5d, 0xef, 0x9c, 0xfb, 0x88, 0x91, 0x59, 0xf9, 0x84, 0xdd, 0x9b, 0x26, 0x8d, 0x80, 0xf9, 0x80, 0x66, 0x2d, 0xac, 0xf7, 0x1f, 0x06, 0xba, 0x7f, 0xff, 0xee, 0xed, 0x40, 0x5f, 0xa5, 0xd6, 0xbd, 0x8c, 0x5b, 0x46, 0xd2, 0x7e, 0x48, 0x4a, 0x65, 0x8f, 0x08, 0x42, 0x60, 0xf7, 0x0f, 0xb9, 0x16, 0x0b, 0x0c, 0x1a, 0x06, 0x00, 0x00, }, nil, }, { // has 1 non-empty fixed huffman block then garbage "hello.txt", "hello.txt + garbage", "hello world\n", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a, 0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1, 0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00, 0x00, 0x00, 'g', 'a', 'r', 'b', 'a', 'g', 'e', '!', '!', '!', }, ErrHeader, }, { // has 1 non-empty fixed huffman block not enough header "hello.txt", "hello.txt + garbage", "hello world\n", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a, 0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1, 0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00, 0x00, 0x00, gzipID1, }, io.ErrUnexpectedEOF, }, { // has 1 non-empty fixed huffman block but corrupt checksum "hello.txt", "hello.txt + corrupt checksum", "hello world\n", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a, 0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1, 0x02, 0x00, 0xff, 0xff, 0xff, 0xff, 0x0c, 0x00, 0x00, 0x00, }, ErrChecksum, }, { // has 1 non-empty fixed huffman block but corrupt size "hello.txt", "hello.txt + corrupt size", "hello world\n", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a, 0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1, 0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0xff, 0x00, 0x00, 0x00, }, ErrChecksum, }, { "f1l3n4m3.tXt", "header with all fields used", "", []byte{ 0x1f, 0x8b, 0x08, 0x1e, 0x70, 0xf0, 0xf9, 0x4a, 0x00, 0xaa, 0x09, 0x00, 0x7a, 0x7a, 0x05, 0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x31, 0x6c, 0x33, 0x6e, 0x34, 0x6d, 0x33, 0x2e, 0x74, 0x58, 0x74, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, 0x00, 0x92, 0xfd, 0x01, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }, nil, }, { "", "truncated gzip file amid raw-block", "hello", []byte{ 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x0c, 0x00, 0xf3, 0xff, 0x68, 0x65, 0x6c, 0x6c, 0x6f, }, io.ErrUnexpectedEOF, }, { "", "truncated gzip file amid fixed-block", "He", []byte{ 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xf2, 0x48, 0xcd, }, io.ErrUnexpectedEOF, }, { "hello.txt", "gzip header with truncated name", "hello world\n", []byte{ 0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a, 0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1, 0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00, 0x00, 0x00, 0x1f, 0x8b, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x01, }, io.ErrUnexpectedEOF, }, { "", "gzip header with truncated comment", "hello world\n", []byte{ 0x1f, 0x8b, 0x08, 0x10, 0xc8, 0x58, 0x13, 0x4a, 0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e, 0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1, 0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00, 0x00, 0x00, 0x1f, 0x8b, 0x08, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x01, }, io.ErrUnexpectedEOF, }, } func TestDecompressor(t *testing.T) { // Keep resetting this reader. // It is intended behavior that Reader.Reset can be called on a zero-value // Reader and be the equivalent as if NewReader was used instead. r1 := new(Reader) b := new(bytes.Buffer) for _, tt := range gunzipTests { // Test NewReader. in := bytes.NewReader(tt.gzip) r2, err := NewReader(in) if err != nil { t.Errorf("%s: NewReader: %s", tt.desc, err) continue } defer r2.Close() if tt.name != r2.Name { t.Errorf("%s: got name %s", tt.desc, r2.Name) } b.Reset() n, err := io.Copy(b, r2) if err != tt.err { t.Errorf("%s: io.Copy: %v want %v", tt.desc, err, tt.err) } s := b.String() if s != tt.raw { t.Errorf("%s: got %d-byte %q want %d-byte %q", tt.desc, n, s, len(tt.raw), tt.raw) } // Test Reader.Reset. in = bytes.NewReader(tt.gzip) err = r1.Reset(in) if err != nil { t.Errorf("%s: Reset: %s", tt.desc, err) continue } if tt.name != r1.Name { t.Errorf("%s: got name %s", tt.desc, r1.Name) } b.Reset() n, err = io.Copy(b, r1) if err != tt.err { t.Errorf("%s: io.Copy: %v want %v", tt.desc, err, tt.err) } s = b.String() if s != tt.raw { t.Errorf("%s: got %d-byte %q want %d-byte %q", tt.desc, n, s, len(tt.raw), tt.raw) } } } func TestIssue6550(t *testing.T) { // Apple’s notarization service will recursively attempt to decompress // files in order to find binaries to notarize. Since the service is // unable to decompress this file, it may reject the entire toolchain. Use a // base64-encoded version to avoid this. // See golang.org/issue/34986 f, err := os.Open("testdata/issue6550.gz.base64") if err != nil { t.Fatal(err) } gzip, err := NewReader(base64.NewDecoder(base64.StdEncoding, f)) if err != nil { t.Fatalf("NewReader(testdata/issue6550.gz): %v", err) } defer gzip.Close() done := make(chan bool, 1) go func() { _, err := io.Copy(io.Discard, gzip) if err == nil { t.Errorf("Copy succeeded") } else { t.Logf("Copy failed (correctly): %v", err) } done <- true }() select { case <-time.After(1 * time.Second): t.Errorf("Copy hung") case <-done: // ok } } func TestMultistreamFalse(t *testing.T) { // Find concatenation test. var tt gunzipTest for _, tt = range gunzipTests { if strings.HasSuffix(tt.desc, " x2") { goto Found } } t.Fatal("cannot find hello.txt x2 in gunzip tests") Found: br := bytes.NewReader(tt.gzip) var r Reader if err := r.Reset(br); err != nil { t.Fatalf("first reset: %v", err) } // Expect two streams with "hello world\n", then real EOF. const hello = "hello world\n" r.Multistream(false) data, err := io.ReadAll(&r) if string(data) != hello || err != nil { t.Fatalf("first stream = %q, %v, want %q, %v", string(data), err, hello, nil) } if err := r.Reset(br); err != nil { t.Fatalf("second reset: %v", err) } r.Multistream(false) data, err = io.ReadAll(&r) if string(data) != hello || err != nil { t.Fatalf("second stream = %q, %v, want %q, %v", string(data), err, hello, nil) } if err := r.Reset(br); err != io.EOF { t.Fatalf("third reset: err=%v, want io.EOF", err) } } func TestNilStream(t *testing.T) { // Go liberally interprets RFC 1952 section 2.2 to mean that a gzip file // consist of zero or more members. Thus, we test that a nil stream is okay. _, err := NewReader(bytes.NewReader(nil)) if err != io.EOF { t.Fatalf("NewReader(nil) on empty stream: got %v, want io.EOF", err) } } func TestTruncatedStreams(t *testing.T) { cases := []struct { name string data []byte }{ { name: "original", data: []byte("\x1f\x8b\b\x04\x00\tn\x88\x00\xff\a\x00foo bar\xcbH\xcd\xc9\xc9\xd7Q(\xcf/\xcaI\x01\x04:r\xab\xff\f\x00\x00\x00"), }, { name: "truncated name", data: []byte{ 0x1f, 0x8b, 0x08, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x01, }, }, { name: "truncated comment", data: []byte{ 0x1f, 0x8b, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x01, }, }, } // Intentionally iterate starting with at least one byte in the stream. for _, tc := range cases { for i := 1; i < len(tc.data); i++ { r, err := NewReader(strings.NewReader(string(tc.data[:i]))) if err != nil { if err != io.ErrUnexpectedEOF { t.Errorf("NewReader(%s-%d) on truncated stream: got %v, want %v", tc.name, i, err, io.ErrUnexpectedEOF) } continue } _, err = io.Copy(io.Discard, r) if ferr, ok := err.(*flate.ReadError); ok { err = ferr.Err } if err != io.ErrUnexpectedEOF { t.Errorf("io.Copy(%s-%d) on truncated stream: got %v, want %v", tc.name, i, err, io.ErrUnexpectedEOF) } } } } func TestCVE202230631(t *testing.T) { var empty = []byte{0x1f, 0x8b, 0x08, 0x00, 0xa7, 0x8f, 0x43, 0x62, 0x00, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} r := bytes.NewReader(bytes.Repeat(empty, 4e6)) z, err := NewReader(r) if err != nil { t.Fatalf("NewReader: got %v, want nil", err) } // Prior to CVE-2022-30631 fix, this would cause an unrecoverable panic due // to stack exhaustion. _, err = z.Read(make([]byte, 10)) if err != io.EOF { t.Errorf("Reader.Read: got %v, want %v", err, io.EOF) } }
SIMPAN
BATAL