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Implement Bech32m encoding/decoding

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This commit is contained in:
Pieter Wuille
2021-01-05 12:55:15 -08:00
parent 4ba1bab443
commit da2bb6976d
6 changed files with 82 additions and 58 deletions
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32
src/test/fuzz/bech32.cpp
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@@ -16,28 +16,28 @@
FUZZ_TARGET(bech32)
{
const std::string random_string(buffer.begin(), buffer.end());
const std::pair<std::string, std::vector<uint8_t>> r1 = bech32::Decode(random_string);
if (r1.first.empty()) {
assert(r1.second.empty());
const auto r1 = bech32::Decode(random_string);
if (r1.hrp.empty()) {
assert(r1.encoding == bech32::Encoding::INVALID);
assert(r1.data.empty());
} else {
const std::string& hrp = r1.first;
const std::vector<uint8_t>& data = r1.second;
const std::string reencoded = bech32::Encode(hrp, data);
assert(r1.encoding != bech32::Encoding::INVALID);
const std::string reencoded = bech32::Encode(r1.encoding, r1.hrp, r1.data);
assert(CaseInsensitiveEqual(random_string, reencoded));
}
std::vector<unsigned char> input;
ConvertBits<8, 5, true>([&](unsigned char c) { input.push_back(c); }, buffer.begin(), buffer.end());
const std::string encoded = bech32::Encode("bc", input);
assert(!encoded.empty());
const std::pair<std::string, std::vector<uint8_t>> r2 = bech32::Decode(encoded);
if (r2.first.empty()) {
assert(r2.second.empty());
} else {
const std::string& hrp = r2.first;
const std::vector<uint8_t>& data = r2.second;
assert(hrp == "bc");
assert(data == input);
if (input.size() + 3 + 6 <= 90) {
// If it's possible to encode input in Bech32(m) without exceeding the 90-character limit:
for (auto encoding : {bech32::Encoding::BECH32, bech32::Encoding::BECH32M}) {
const std::string encoded = bech32::Encode(encoding, "bc", input);
assert(!encoded.empty());
const auto r2 = bech32::Decode(encoded);
assert(r2.encoding == encoding);
assert(r2.hrp == "bc");
assert(r2.data == input);
}
}
}