net: recognize TORv3/I2P/CJDNS networks

Recognizing addresses from those networks allows us to accept and gossip
them, even though we don't know how to connect to them (yet).

Co-authored-by: eriknylund <erik@daychanged.com>

2 files changed, 22 insertions, 6 deletions

diff --git a/src/util/strencodings.cpp b/src/util/strencodings.cpp
index 079a4529a3..3236184b0b 100644
--- a/src/util/strencodings.cpp
+++ b/src/util/strencodings.cpp
@@ -201,20 +201,24 @@ std::string DecodeBase64(const std::string& str, bool* pf_invalid)
     return std::string((const char*)vchRet.data(), vchRet.size());
 }
 
-std::string EncodeBase32(Span<const unsigned char> input)
+std::string EncodeBase32(Span<const unsigned char> input, bool pad)
 {
     static const char *pbase32 = "abcdefghijklmnopqrstuvwxyz234567";
 
     std::string str;
     str.reserve(((input.size() + 4) / 5) * 8);
     ConvertBits<8, 5, true>([&](int v) { str += pbase32[v]; }, input.begin(), input.end());
-    while (str.size() % 8) str += '=';
+    if (pad) {
+        while (str.size() % 8) {
+            str += '=';
+        }
+    }
     return str;
 }
 
-std::string EncodeBase32(const std::string& str)
+std::string EncodeBase32(const std::string& str, bool pad)
 {
-    return EncodeBase32(MakeUCharSpan(str));
+    return EncodeBase32(MakeUCharSpan(str), pad);
 }
 
 std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid)
diff --git a/src/util/strencodings.h b/src/util/strencodings.h
index 1519214140..1a217dd12d 100644
--- a/src/util/strencodings.h
+++ b/src/util/strencodings.h
@@ -52,8 +52,20 @@ std::string EncodeBase64(Span<const unsigned char> input);
 std::string EncodeBase64(const std::string& str);
 std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid = nullptr);
 std::string DecodeBase32(const std::string& str, bool* pf_invalid = nullptr);
-std::string EncodeBase32(Span<const unsigned char> input);
-std::string EncodeBase32(const std::string& str);
+
+/**
+ * Base32 encode.
+ * If `pad` is true, then the output will be padded with '=' so that its length
+ * is a multiple of 8.
+ */
+std::string EncodeBase32(Span<const unsigned char> input, bool pad = true);
+
+/**
+ * Base32 encode.
+ * If `pad` is true, then the output will be padded with '=' so that its length
+ * is a multiple of 8.
+ */
+std::string EncodeBase32(const std::string& str, bool pad = true);
 
 void SplitHostPort(std::string in, int& portOut, std::string& hostOut);
 int64_t atoi64(const std::string& str);