1 // Copyright (c) 2015-2017 The btcsuite developers
2 // Use of this source code is governed by an ISC
3 // license that can be found in the LICENSE file.
13 // hexToBytes converts the passed hex string into bytes and will panic if there
14 // is an error. This is only provided for the hard-coded constants so errors in
15 // the source code can be detected. It will only (and must only) be called with
17 func hexToBytes(s string) []byte {
18 b, err := hex.DecodeString(s)
20 panic("invalid hex in source file: " + s)
25 // TestScriptNumBytes ensures that converting from integral script numbers to
26 // byte representations works as expected.
27 func TestScriptNumBytes(t *testing.T) {
35 {1, hexToBytes("01")},
36 {-1, hexToBytes("81")},
37 {127, hexToBytes("7f")},
38 {-127, hexToBytes("ff")},
39 {128, hexToBytes("8000")},
40 {-128, hexToBytes("8080")},
41 {129, hexToBytes("8100")},
42 {-129, hexToBytes("8180")},
43 {256, hexToBytes("0001")},
44 {-256, hexToBytes("0081")},
45 {32767, hexToBytes("ff7f")},
46 {-32767, hexToBytes("ffff")},
47 {32768, hexToBytes("008000")},
48 {-32768, hexToBytes("008080")},
49 {65535, hexToBytes("ffff00")},
50 {-65535, hexToBytes("ffff80")},
51 {524288, hexToBytes("000008")},
52 {-524288, hexToBytes("000088")},
53 {7340032, hexToBytes("000070")},
54 {-7340032, hexToBytes("0000f0")},
55 {8388608, hexToBytes("00008000")},
56 {-8388608, hexToBytes("00008080")},
57 {2147483647, hexToBytes("ffffff7f")},
58 {-2147483647, hexToBytes("ffffffff")},
60 // Values that are out of range for data that is interpreted as
61 // numbers, but are allowed as the result of numeric operations.
62 {2147483648, hexToBytes("0000008000")},
63 {-2147483648, hexToBytes("0000008080")},
64 {2415919104, hexToBytes("0000009000")},
65 {-2415919104, hexToBytes("0000009080")},
66 {4294967295, hexToBytes("ffffffff00")},
67 {-4294967295, hexToBytes("ffffffff80")},
68 {4294967296, hexToBytes("0000000001")},
69 {-4294967296, hexToBytes("0000000081")},
70 {281474976710655, hexToBytes("ffffffffffff00")},
71 {-281474976710655, hexToBytes("ffffffffffff80")},
72 {72057594037927935, hexToBytes("ffffffffffffff00")},
73 {-72057594037927935, hexToBytes("ffffffffffffff80")},
74 {9223372036854775807, hexToBytes("ffffffffffffff7f")},
75 {-9223372036854775807, hexToBytes("ffffffffffffffff")},
78 for _, test := range tests {
79 gotBytes := test.num.Bytes()
80 if !bytes.Equal(gotBytes, test.serialized) {
81 t.Errorf("Bytes: did not get expected bytes for %d - "+
82 "got %x, want %x", test.num, gotBytes,
89 // TestMakeScriptNum ensures that converting from byte representations to
90 // integral script numbers works as expected.
91 func TestMakeScriptNum(t *testing.T) {
94 // Errors used in the tests below defined here for convenience and to
95 // keep the horizontal test size shorter.
96 errNumTooBig := scriptError(ErrNumberTooBig, "")
97 errMinimalData := scriptError(ErrMinimalData, "")
106 // Minimal encoding must reject negative 0.
107 {hexToBytes("80"), 0, defaultScriptNumLen, true, errMinimalData},
109 // Minimally encoded valid values with minimal encoding flag.
110 // Should not error and return expected integral number.
111 {nil, 0, defaultScriptNumLen, true, nil},
112 {hexToBytes("01"), 1, defaultScriptNumLen, true, nil},
113 {hexToBytes("81"), -1, defaultScriptNumLen, true, nil},
114 {hexToBytes("7f"), 127, defaultScriptNumLen, true, nil},
115 {hexToBytes("ff"), -127, defaultScriptNumLen, true, nil},
116 {hexToBytes("8000"), 128, defaultScriptNumLen, true, nil},
117 {hexToBytes("8080"), -128, defaultScriptNumLen, true, nil},
118 {hexToBytes("8100"), 129, defaultScriptNumLen, true, nil},
119 {hexToBytes("8180"), -129, defaultScriptNumLen, true, nil},
120 {hexToBytes("0001"), 256, defaultScriptNumLen, true, nil},
121 {hexToBytes("0081"), -256, defaultScriptNumLen, true, nil},
122 {hexToBytes("ff7f"), 32767, defaultScriptNumLen, true, nil},
123 {hexToBytes("ffff"), -32767, defaultScriptNumLen, true, nil},
124 {hexToBytes("008000"), 32768, defaultScriptNumLen, true, nil},
125 {hexToBytes("008080"), -32768, defaultScriptNumLen, true, nil},
126 {hexToBytes("ffff00"), 65535, defaultScriptNumLen, true, nil},
127 {hexToBytes("ffff80"), -65535, defaultScriptNumLen, true, nil},
128 {hexToBytes("000008"), 524288, defaultScriptNumLen, true, nil},
129 {hexToBytes("000088"), -524288, defaultScriptNumLen, true, nil},
130 {hexToBytes("000070"), 7340032, defaultScriptNumLen, true, nil},
131 {hexToBytes("0000f0"), -7340032, defaultScriptNumLen, true, nil},
132 {hexToBytes("00008000"), 8388608, defaultScriptNumLen, true, nil},
133 {hexToBytes("00008080"), -8388608, defaultScriptNumLen, true, nil},
134 {hexToBytes("ffffff7f"), 2147483647, defaultScriptNumLen, true, nil},
135 {hexToBytes("ffffffff"), -2147483647, defaultScriptNumLen, true, nil},
136 {hexToBytes("ffffffff7f"), 549755813887, 5, true, nil},
137 {hexToBytes("ffffffffff"), -549755813887, 5, true, nil},
138 {hexToBytes("ffffffffffffff7f"), 9223372036854775807, 8, true, nil},
139 {hexToBytes("ffffffffffffffff"), -9223372036854775807, 8, true, nil},
140 {hexToBytes("ffffffffffffffff7f"), -1, 9, true, nil},
141 {hexToBytes("ffffffffffffffffff"), 1, 9, true, nil},
142 {hexToBytes("ffffffffffffffffff7f"), -1, 10, true, nil},
143 {hexToBytes("ffffffffffffffffffff"), 1, 10, true, nil},
145 // Minimally encoded values that are out of range for data that
146 // is interpreted as script numbers with the minimal encoding
147 // flag set. Should error and return 0.
148 {hexToBytes("0000008000"), 0, defaultScriptNumLen, true, errNumTooBig},
149 {hexToBytes("0000008080"), 0, defaultScriptNumLen, true, errNumTooBig},
150 {hexToBytes("0000009000"), 0, defaultScriptNumLen, true, errNumTooBig},
151 {hexToBytes("0000009080"), 0, defaultScriptNumLen, true, errNumTooBig},
152 {hexToBytes("ffffffff00"), 0, defaultScriptNumLen, true, errNumTooBig},
153 {hexToBytes("ffffffff80"), 0, defaultScriptNumLen, true, errNumTooBig},
154 {hexToBytes("0000000001"), 0, defaultScriptNumLen, true, errNumTooBig},
155 {hexToBytes("0000000081"), 0, defaultScriptNumLen, true, errNumTooBig},
156 {hexToBytes("ffffffffffff00"), 0, defaultScriptNumLen, true, errNumTooBig},
157 {hexToBytes("ffffffffffff80"), 0, defaultScriptNumLen, true, errNumTooBig},
158 {hexToBytes("ffffffffffffff00"), 0, defaultScriptNumLen, true, errNumTooBig},
159 {hexToBytes("ffffffffffffff80"), 0, defaultScriptNumLen, true, errNumTooBig},
160 {hexToBytes("ffffffffffffff7f"), 0, defaultScriptNumLen, true, errNumTooBig},
161 {hexToBytes("ffffffffffffffff"), 0, defaultScriptNumLen, true, errNumTooBig},
163 // Non-minimally encoded, but otherwise valid values with
164 // minimal encoding flag. Should error and return 0.
165 {hexToBytes("00"), 0, defaultScriptNumLen, true, errMinimalData}, // 0
166 {hexToBytes("0100"), 0, defaultScriptNumLen, true, errMinimalData}, // 1
167 {hexToBytes("7f00"), 0, defaultScriptNumLen, true, errMinimalData}, // 127
168 {hexToBytes("800000"), 0, defaultScriptNumLen, true, errMinimalData}, // 128
169 {hexToBytes("810000"), 0, defaultScriptNumLen, true, errMinimalData}, // 129
170 {hexToBytes("000100"), 0, defaultScriptNumLen, true, errMinimalData}, // 256
171 {hexToBytes("ff7f00"), 0, defaultScriptNumLen, true, errMinimalData}, // 32767
172 {hexToBytes("00800000"), 0, defaultScriptNumLen, true, errMinimalData}, // 32768
173 {hexToBytes("ffff0000"), 0, defaultScriptNumLen, true, errMinimalData}, // 65535
174 {hexToBytes("00000800"), 0, defaultScriptNumLen, true, errMinimalData}, // 524288
175 {hexToBytes("00007000"), 0, defaultScriptNumLen, true, errMinimalData}, // 7340032
176 {hexToBytes("0009000100"), 0, 5, true, errMinimalData}, // 16779520
178 // Non-minimally encoded, but otherwise valid values without
179 // minimal encoding flag. Should not error and return expected
181 {hexToBytes("00"), 0, defaultScriptNumLen, false, nil},
182 {hexToBytes("0100"), 1, defaultScriptNumLen, false, nil},
183 {hexToBytes("7f00"), 127, defaultScriptNumLen, false, nil},
184 {hexToBytes("800000"), 128, defaultScriptNumLen, false, nil},
185 {hexToBytes("810000"), 129, defaultScriptNumLen, false, nil},
186 {hexToBytes("000100"), 256, defaultScriptNumLen, false, nil},
187 {hexToBytes("ff7f00"), 32767, defaultScriptNumLen, false, nil},
188 {hexToBytes("00800000"), 32768, defaultScriptNumLen, false, nil},
189 {hexToBytes("ffff0000"), 65535, defaultScriptNumLen, false, nil},
190 {hexToBytes("00000800"), 524288, defaultScriptNumLen, false, nil},
191 {hexToBytes("00007000"), 7340032, defaultScriptNumLen, false, nil},
192 {hexToBytes("0009000100"), 16779520, 5, false, nil},
195 for _, test := range tests {
196 // Ensure the error code is of the expected type and the error
197 // code matches the value specified in the test instance.
198 gotNum, err := makeScriptNum(test.serialized, test.minimalEncoding,
200 if e := tstCheckScriptError(err, test.err); e != nil {
201 t.Errorf("makeScriptNum(%#x): %v", test.serialized, e)
205 if gotNum != test.num {
206 t.Errorf("makeScriptNum(%#x): did not get expected "+
207 "number - got %d, want %d", test.serialized,
214 // TestScriptNumInt32 ensures that the Int32 function on script number behaves
216 func TestScriptNumInt32(t *testing.T) {
223 // Values inside the valid int32 range are just the values
224 // themselves cast to an int32.
245 {-7340032, -7340032},
247 {-8388608, -8388608},
248 {2147483647, 2147483647},
249 {-2147483647, -2147483647},
250 {-2147483648, -2147483648},
252 // Values outside of the valid int32 range are limited to int32.
253 {2147483648, 2147483647},
254 {-2147483649, -2147483648},
255 {1152921504606846975, 2147483647},
256 {-1152921504606846975, -2147483648},
257 {2305843009213693951, 2147483647},
258 {-2305843009213693951, -2147483648},
259 {4611686018427387903, 2147483647},
260 {-4611686018427387903, -2147483648},
261 {9223372036854775807, 2147483647},
262 {-9223372036854775808, -2147483648},
265 for _, test := range tests {
266 got := test.in.Int32()
267 if got != test.want {
268 t.Errorf("Int32: did not get expected value for %d - "+
269 "got %d, want %d", test.in, got, test.want)