|
| 1 | +package base58 |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "testing" |
| 6 | + |
| 7 | + mrtronbase58 "github.com/mr-tron/base58" |
| 8 | +) |
| 9 | + |
| 10 | +// --- Encode fuzz: our output must match mr-tron for every input --- |
| 11 | + |
| 12 | +func FuzzEncode32_MatchesMrTron(f *testing.F) { |
| 13 | + f.Add(make([]byte, 32)) // all zeros |
| 14 | + f.Add(bytes.Repeat([]byte{0xff}, 32)) // all 0xFF |
| 15 | + f.Add(append([]byte{1}, make([]byte, 31)...)) // single leading byte |
| 16 | + f.Add(append(make([]byte, 31), 1)) // trailing 1 |
| 17 | + |
| 18 | + f.Fuzz(func(t *testing.T, data []byte) { |
| 19 | + if len(data) != 32 { |
| 20 | + t.Skip() |
| 21 | + } |
| 22 | + var src [32]byte |
| 23 | + copy(src[:], data) |
| 24 | + |
| 25 | + ours := Encode32(&src) |
| 26 | + theirs := mrtronbase58.Encode(src[:]) |
| 27 | + if ours != theirs { |
| 28 | + t.Fatalf("Encode32 mismatch for %x:\n ours: %s\n theirs: %s", src, ours, theirs) |
| 29 | + } |
| 30 | + }) |
| 31 | +} |
| 32 | + |
| 33 | +func FuzzEncode64_MatchesMrTron(f *testing.F) { |
| 34 | + f.Add(make([]byte, 64)) |
| 35 | + f.Add(bytes.Repeat([]byte{0xff}, 64)) |
| 36 | + f.Add(append([]byte{1}, make([]byte, 63)...)) |
| 37 | + |
| 38 | + f.Fuzz(func(t *testing.T, data []byte) { |
| 39 | + if len(data) != 64 { |
| 40 | + t.Skip() |
| 41 | + } |
| 42 | + var src [64]byte |
| 43 | + copy(src[:], data) |
| 44 | + |
| 45 | + ours := Encode64(&src) |
| 46 | + theirs := mrtronbase58.Encode(src[:]) |
| 47 | + if ours != theirs { |
| 48 | + t.Fatalf("Encode64 mismatch for %x:\n ours: %s\n theirs: %s", src, ours, theirs) |
| 49 | + } |
| 50 | + }) |
| 51 | +} |
| 52 | + |
| 53 | +// --- Decode fuzz: round-trip through mr-tron must agree --- |
| 54 | + |
| 55 | +func FuzzDecode32_MatchesMrTron(f *testing.F) { |
| 56 | + f.Add("11111111111111111111111111111111") |
| 57 | + f.Add("11111111111111111111111111111112") |
| 58 | + f.Add("4cHoJNmLed5PBgFBezHmJkMJLEZrcTvr3aopjnYBRxUb") |
| 59 | + |
| 60 | + f.Fuzz(func(t *testing.T, encoded string) { |
| 61 | + var dst [32]byte |
| 62 | + err := Decode32(encoded, &dst) |
| 63 | + if err != nil { |
| 64 | + // We're stricter than mr-tron (fixed size, leading-zero |
| 65 | + // validation). Just verify we don't panic. |
| 66 | + return |
| 67 | + } |
| 68 | + |
| 69 | + // If we accepted it, mr-tron must decode to the same bytes. |
| 70 | + theirBytes, theirErr := mrtronbase58.Decode(encoded) |
| 71 | + if theirErr != nil { |
| 72 | + t.Fatalf("we accepted %q but mr-tron rejected it: %v", encoded, theirErr) |
| 73 | + } |
| 74 | + |
| 75 | + // mr-tron strips leading zeros; pad to compare. |
| 76 | + padded := make([]byte, 32) |
| 77 | + copy(padded[32-len(theirBytes):], theirBytes) |
| 78 | + if !bytes.Equal(dst[:], padded) { |
| 79 | + t.Fatalf("decode mismatch for %q:\n ours: %x\n theirs: %x", encoded, dst, padded) |
| 80 | + } |
| 81 | + |
| 82 | + // Re-encode must produce the original string. |
| 83 | + reEncoded := Encode32(&dst) |
| 84 | + if reEncoded != encoded { |
| 85 | + t.Fatalf("round-trip mismatch: %q -> %x -> %q", encoded, dst, reEncoded) |
| 86 | + } |
| 87 | + }) |
| 88 | +} |
| 89 | + |
| 90 | +func FuzzDecode64_MatchesMrTron(f *testing.F) { |
| 91 | + f.Add("5YBLhMBLjhAHnEPnHKLLnVwHSfXGPJMCvKAfNsiaEw2T63edrYxVFHKUxRXfP6KA1HVo7c9JZ3LAJQR72giX7Cb") |
| 92 | + |
| 93 | + f.Fuzz(func(t *testing.T, encoded string) { |
| 94 | + var dst [64]byte |
| 95 | + err := Decode64(encoded, &dst) |
| 96 | + if err != nil { |
| 97 | + return |
| 98 | + } |
| 99 | + |
| 100 | + theirBytes, theirErr := mrtronbase58.Decode(encoded) |
| 101 | + if theirErr != nil { |
| 102 | + t.Fatalf("we accepted %q but mr-tron rejected it: %v", encoded, theirErr) |
| 103 | + } |
| 104 | + |
| 105 | + padded := make([]byte, 64) |
| 106 | + copy(padded[64-len(theirBytes):], theirBytes) |
| 107 | + if !bytes.Equal(dst[:], padded) { |
| 108 | + t.Fatalf("decode mismatch for %q:\n ours: %x\n theirs: %x", encoded, dst, padded) |
| 109 | + } |
| 110 | + |
| 111 | + reEncoded := Encode64(&dst) |
| 112 | + if reEncoded != encoded { |
| 113 | + t.Fatalf("round-trip mismatch: %q -> %x -> %q", encoded, dst, reEncoded) |
| 114 | + } |
| 115 | + }) |
| 116 | +} |
| 117 | + |
| 118 | +// --- Invalid input fuzz: verify we never panic --- |
| 119 | + |
| 120 | +func FuzzDecode32_NoPanic(f *testing.F) { |
| 121 | + f.Add([]byte("")) |
| 122 | + f.Add([]byte("0")) // invalid char |
| 123 | + f.Add([]byte("O")) // invalid char |
| 124 | + f.Add([]byte("I")) // invalid char |
| 125 | + f.Add([]byte("l")) // invalid char |
| 126 | + f.Add([]byte("\x00")) // null byte |
| 127 | + f.Add([]byte("\xff")) // high byte |
| 128 | + f.Add(bytes.Repeat([]byte("z"), 45)) // too long |
| 129 | + f.Add(bytes.Repeat([]byte("1"), 50)) // way too long |
| 130 | + |
| 131 | + f.Fuzz(func(t *testing.T, data []byte) { |
| 132 | + var dst [32]byte |
| 133 | + // Must not panic regardless of input. |
| 134 | + Decode32(string(data), &dst) |
| 135 | + }) |
| 136 | +} |
| 137 | + |
| 138 | +func FuzzDecode64_NoPanic(f *testing.F) { |
| 139 | + f.Add([]byte("")) |
| 140 | + f.Add([]byte("0")) |
| 141 | + f.Add([]byte("\x00")) |
| 142 | + f.Add([]byte("\xff")) |
| 143 | + f.Add(bytes.Repeat([]byte("z"), 91)) |
| 144 | + |
| 145 | + f.Fuzz(func(t *testing.T, data []byte) { |
| 146 | + var dst [64]byte |
| 147 | + Decode64(string(data), &dst) |
| 148 | + }) |
| 149 | +} |
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