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-rw-r--r--comm/third_party/botan/src/lib/codec/base58/base58.cpp189
-rw-r--r--comm/third_party/botan/src/lib/codec/base58/base58.h76
-rw-r--r--comm/third_party/botan/src/lib/codec/base58/info.txt8
3 files changed, 273 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/codec/base58/base58.cpp b/comm/third_party/botan/src/lib/codec/base58/base58.cpp
new file mode 100644
index 0000000000..a6d509012d
--- /dev/null
+++ b/comm/third_party/botan/src/lib/codec/base58/base58.cpp
@@ -0,0 +1,189 @@
+/*
+* (C) 2018,2020 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/base58.h>
+#include <botan/exceptn.h>
+#include <botan/bigint.h>
+#include <botan/divide.h>
+#include <botan/loadstor.h>
+#include <botan/internal/ct_utils.h>
+#include <botan/hash.h>
+
+namespace Botan {
+
+namespace {
+
+uint32_t sha256_d_checksum(const uint8_t input[], size_t input_length)
+ {
+ std::unique_ptr<HashFunction> sha256 = HashFunction::create_or_throw("SHA-256");
+
+ std::vector<uint8_t> checksum(32);
+
+ sha256->update(input, input_length);
+ sha256->final(checksum);
+
+ sha256->update(checksum);
+ sha256->final(checksum);
+
+ return load_be<uint32_t>(checksum.data(), 0);
+ }
+
+char lookup_base58_char(uint8_t x)
+ {
+ // "123456789 ABCDEFGH JKLMN PQRSTUVWXYZ abcdefghijk mnopqrstuvwxyz"
+ BOTAN_DEBUG_ASSERT(x < 58);
+
+ const auto is_dec_19 = CT::Mask<uint8_t>::is_lte(x, 8);
+ const auto is_alpha_AH = CT::Mask<uint8_t>::is_within_range(x, 9, 16);
+ const auto is_alpha_JN = CT::Mask<uint8_t>::is_within_range(x, 17, 21);
+ const auto is_alpha_PZ = CT::Mask<uint8_t>::is_within_range(x, 22, 32);
+ const auto is_alpha_ak = CT::Mask<uint8_t>::is_within_range(x, 33, 43);
+ // otherwise in 'm'-'z'
+
+ const char c_19 = '1' + x;
+ const char c_AH = 'A' + (x - 9);
+ const char c_JN = 'J' + (x - 17);
+ const char c_PZ = 'P' + (x - 22);
+ const char c_ak = 'a' + (x - 33);
+ const char c_mz = 'm' + (x - 44);
+
+ char ret = c_mz;
+ ret = is_dec_19.select(c_19, ret);
+ ret = is_alpha_AH.select(c_AH, ret);
+ ret = is_alpha_JN.select(c_JN, ret);
+ ret = is_alpha_PZ.select(c_PZ, ret);
+ ret = is_alpha_ak.select(c_ak, ret);
+
+ return ret;
+ }
+
+std::string base58_encode(BigInt v, size_t leading_zeros)
+ {
+ const uint8_t radix = 58;
+
+ std::string result;
+ BigInt q;
+
+ while(v.is_nonzero())
+ {
+ uint8_t r;
+ ct_divide_u8(v, radix, q, r);
+ result.push_back(lookup_base58_char(r));
+ v.swap(q);
+ }
+
+ for(size_t i = 0; i != leading_zeros; ++i)
+ result.push_back('1'); // 'zero' byte
+
+ return std::string(result.rbegin(), result.rend());
+ }
+
+template<typename T, typename Z>
+size_t count_leading_zeros(const T input[], size_t input_length, Z zero)
+ {
+ size_t leading_zeros = 0;
+
+ while(leading_zeros < input_length && input[leading_zeros] == zero)
+ leading_zeros += 1;
+
+ return leading_zeros;
+ }
+
+uint8_t base58_value_of(char input)
+ {
+ // "123456789 ABCDEFGH JKLMN PQRSTUVWXYZ abcdefghijk mnopqrstuvwxyz"
+
+ const uint8_t c = static_cast<uint8_t>(input);
+
+ const auto is_dec_19 = CT::Mask<uint8_t>::is_within_range(c, uint8_t('1'), uint8_t('9'));
+ const auto is_alpha_AH = CT::Mask<uint8_t>::is_within_range(c, uint8_t('A'), uint8_t('H'));
+ const auto is_alpha_JN = CT::Mask<uint8_t>::is_within_range(c, uint8_t('J'), uint8_t('N'));
+ const auto is_alpha_PZ = CT::Mask<uint8_t>::is_within_range(c, uint8_t('P'), uint8_t('Z'));
+
+ const auto is_alpha_ak = CT::Mask<uint8_t>::is_within_range(c, uint8_t('a'), uint8_t('k'));
+ const auto is_alpha_mz = CT::Mask<uint8_t>::is_within_range(c, uint8_t('m'), uint8_t('z'));
+
+ const uint8_t c_dec_19 = c - uint8_t('1');
+ const uint8_t c_AH = c - uint8_t('A') + 9;
+ const uint8_t c_JN = c - uint8_t('J') + 17;
+ const uint8_t c_PZ = c - uint8_t('P') + 22;
+
+ const uint8_t c_ak = c - uint8_t('a') + 33;
+ const uint8_t c_mz = c - uint8_t('m') + 44;
+
+ uint8_t ret = 0xFF; // default value
+
+ ret = is_dec_19.select(c_dec_19, ret);
+ ret = is_alpha_AH.select(c_AH, ret);
+ ret = is_alpha_JN.select(c_JN, ret);
+ ret = is_alpha_PZ.select(c_PZ, ret);
+ ret = is_alpha_ak.select(c_ak, ret);
+ ret = is_alpha_mz.select(c_mz, ret);
+ return ret;
+ }
+
+}
+
+std::string base58_encode(const uint8_t input[], size_t input_length)
+ {
+ BigInt v(input, input_length);
+ return base58_encode(v, count_leading_zeros(input, input_length, 0));
+ }
+
+std::string base58_check_encode(const uint8_t input[], size_t input_length)
+ {
+ BigInt v(input, input_length);
+ v <<= 32;
+ v += sha256_d_checksum(input, input_length);
+ return base58_encode(v, count_leading_zeros(input, input_length, 0));
+ }
+
+std::vector<uint8_t> base58_decode(const char input[], size_t input_length)
+ {
+ const size_t leading_zeros = count_leading_zeros(input, input_length, '1');
+
+ BigInt v;
+
+ for(size_t i = leading_zeros; i != input_length; ++i)
+ {
+ const char c = input[i];
+
+ if(c == ' ' || c == '\n')
+ continue;
+
+ const uint8_t idx = base58_value_of(c);
+
+ if(idx == 0xFF)
+ throw Decoding_Error("Invalid base58");
+
+ v *= 58;
+ v += idx;
+ }
+
+ std::vector<uint8_t> output(v.bytes() + leading_zeros);
+ v.binary_encode(output.data() + leading_zeros);
+ return output;
+ }
+
+std::vector<uint8_t> base58_check_decode(const char input[], size_t input_length)
+ {
+ std::vector<uint8_t> dec = base58_decode(input, input_length);
+
+ if(dec.size() < 4)
+ throw Decoding_Error("Invalid base58 too short for checksum");
+
+ const uint32_t computed_checksum = sha256_d_checksum(dec.data(), dec.size() - 4);
+ const uint32_t checksum = load_be<uint32_t>(&dec[dec.size()-4], 0);
+
+ if(checksum != computed_checksum)
+ throw Decoding_Error("Invalid base58 checksum");
+
+ dec.resize(dec.size() - 4);
+
+ return dec;
+ }
+
+}
diff --git a/comm/third_party/botan/src/lib/codec/base58/base58.h b/comm/third_party/botan/src/lib/codec/base58/base58.h
new file mode 100644
index 0000000000..4654a0557c
--- /dev/null
+++ b/comm/third_party/botan/src/lib/codec/base58/base58.h
@@ -0,0 +1,76 @@
+/*
+* (C) 2018 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_BASE58_CODEC_H_
+#define BOTAN_BASE58_CODEC_H_
+
+#include <botan/secmem.h>
+#include <vector>
+#include <string>
+
+namespace Botan {
+
+/**
+* Perform base58 encoding
+*
+* This is raw base58 encoding, without the checksum
+*/
+std::string
+BOTAN_PUBLIC_API(2,9) base58_encode(const uint8_t input[],
+ size_t input_length);
+
+/**
+* Perform base58 encoding with checksum
+*/
+std::string
+BOTAN_PUBLIC_API(2,9) base58_check_encode(const uint8_t input[],
+ size_t input_length);
+
+
+/**
+* Perform base58 decoding
+*
+* This is raw base58 encoding, without the checksum
+*/
+std::vector<uint8_t>
+BOTAN_PUBLIC_API(2,9) base58_decode(const char input[],
+ size_t input_length);
+
+/**
+* Perform base58 decoding with checksum
+*/
+std::vector<uint8_t>
+BOTAN_PUBLIC_API(2,9) base58_check_decode(const char input[],
+ size_t input_length);
+
+
+// Some convenience wrappers:
+
+template<typename Alloc>
+inline std::string base58_encode(const std::vector<uint8_t, Alloc>& vec)
+ {
+ return base58_encode(vec.data(), vec.size());
+ }
+
+template<typename Alloc>
+inline std::string base58_check_encode(const std::vector<uint8_t, Alloc>& vec)
+ {
+ return base58_check_encode(vec.data(), vec.size());
+ }
+
+inline std::vector<uint8_t> base58_decode(const std::string& s)
+ {
+ return base58_decode(s.data(), s.size());
+ }
+
+inline std::vector<uint8_t> base58_check_decode(const std::string& s)
+ {
+ return base58_check_decode(s.data(), s.size());
+ }
+
+}
+
+#endif
diff --git a/comm/third_party/botan/src/lib/codec/base58/info.txt b/comm/third_party/botan/src/lib/codec/base58/info.txt
new file mode 100644
index 0000000000..0b09c016d0
--- /dev/null
+++ b/comm/third_party/botan/src/lib/codec/base58/info.txt
@@ -0,0 +1,8 @@
+<defines>
+BASE58_CODEC -> 20181209
+</defines>
+
+<requires>
+sha2_32
+bigint
+</requires>
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 13:27:26 +0000