aboutsummaryrefslogtreecommitdiff
path: root/src/util/serialize.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/util/serialize.cpp')
-rw-r--r--src/util/serialize.cpp275
1 files changed, 178 insertions, 97 deletions
diff --git a/src/util/serialize.cpp b/src/util/serialize.cpp
index 659e816b0..120884d13 100644
--- a/src/util/serialize.cpp
+++ b/src/util/serialize.cpp
@@ -28,76 +28,101 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include <iomanip>
#include <vector>
-// Creates a string with the length as the first two bytes
+////
+//// String
+////
+
std::string serializeString(const std::string &plain)
{
- if(plain.size() > 65535)
- throw SerializationError("String too long for serializeString");
- char buf[2];
- writeU16((u8*)&buf[0], plain.size());
std::string s;
- s.append(buf, 2);
- s.append(plain);
- return s;
-}
+ char buf[2];
-// Creates a string with the length as the first two bytes from wide string
-std::string serializeWideString(const std::wstring &plain)
-{
- if(plain.size() > 65535)
+ if (plain.size() > 65535)
throw SerializationError("String too long for serializeString");
- char buf[2];
- writeU16((u8*)buf, plain.size());
- std::string s;
+
+ writeU16((u8 *)&buf[0], plain.size());
s.append(buf, 2);
- for(u32 i=0; i<plain.size(); i++)
- {
- writeU16((u8*)buf, plain[i]);
- s.append(buf, 2);
- }
+
+ s.append(plain);
return s;
}
-// Reads a string with the length as the first two bytes
std::string deSerializeString(std::istream &is)
{
+ std::string s;
char buf[2];
+
is.read(buf, 2);
- if(is.gcount() != 2)
+ if (is.gcount() != 2)
throw SerializationError("deSerializeString: size not read");
- u16 s_size = readU16((u8*)buf);
- std::string s;
- if(s_size == 0)
+
+ u16 s_size = readU16((u8 *)buf);
+ if (s_size == 0)
return s;
+
Buffer<char> buf2(s_size);
is.read(&buf2[0], s_size);
+ if (is.gcount() != s_size)
+ throw SerializationError("deSerializeString: couldn't read all chars");
+
s.reserve(s_size);
s.append(&buf2[0], s_size);
return s;
}
-// Reads a wide string with the length as the first two bytes
+////
+//// Wide String
+////
+
+std::string serializeWideString(const std::wstring &plain)
+{
+ std::string s;
+ char buf[2];
+
+ if (plain.size() > 65535)
+ throw SerializationError("String too long for serializeString");
+
+ writeU16((u8 *)buf, plain.size());
+ s.append(buf, 2);
+
+ for (u32 i = 0; i < plain.size(); i++) {
+ writeU16((u8 *)buf, plain[i]);
+ s.append(buf, 2);
+ }
+ return s;
+}
+
std::wstring deSerializeWideString(std::istream &is)
{
+ std::wstring s;
char buf[2];
+
is.read(buf, 2);
- if(is.gcount() != 2)
+ if (is.gcount() != 2)
throw SerializationError("deSerializeString: size not read");
- u16 s_size = readU16((u8*)buf);
- std::wstring s;
- if(s_size == 0)
+
+ u16 s_size = readU16((u8 *)buf);
+ if (s_size == 0)
return s;
+
s.reserve(s_size);
- for(u32 i=0; i<s_size; i++)
- {
+ for (u32 i = 0; i < s_size; i++) {
is.read(&buf[0], 2);
- wchar_t c16 = readU16((u8*)buf);
+ if (is.gcount() != 2) {
+ throw SerializationError(
+ "deSerializeWideString: couldn't read all chars");
+ }
+
+ wchar_t c16 = readU16((u8 *)buf);
s.append(&c16, 1);
}
return s;
}
-// Creates a string with the length as the first four bytes
+////
+//// Long String
+////
+
std::string serializeLongString(const std::string &plain)
{
char buf[4];
@@ -108,62 +133,86 @@ std::string serializeLongString(const std::string &plain)
return s;
}
-// Reads a string with the length as the first four bytes
std::string deSerializeLongString(std::istream &is)
{
+ std::string s;
char buf[4];
+
is.read(buf, 4);
- if(is.gcount() != 4)
+ if (is.gcount() != 4)
throw SerializationError("deSerializeLongString: size not read");
- u32 s_size = readU32((u8*)buf);
- std::string s;
- if(s_size == 0)
+
+ u32 s_size = readU32((u8 *)buf);
+ if (s_size == 0)
return s;
+
+ // We don't really want a remote attacker to force us to allocate 4GB...
+ if (s_size > LONG_STRING_MAX)
+ throw SerializationError("deSerializeLongString: string too long");
+
Buffer<char> buf2(s_size);
is.read(&buf2[0], s_size);
+ if (is.gcount() != s_size)
+ throw SerializationError("deSerializeString: couldn't read all chars");
+
s.reserve(s_size);
s.append(&buf2[0], s_size);
return s;
}
-// Creates a string encoded in JSON format (almost equivalent to a C string literal)
+////
+//// JSON
+////
+
std::string serializeJsonString(const std::string &plain)
{
std::ostringstream os(std::ios::binary);
- os<<"\"";
- for(size_t i = 0; i < plain.size(); i++)
- {
+ os << "\"";
+
+ for (size_t i = 0; i < plain.size(); i++) {
char c = plain[i];
- switch(c)
- {
- case '"': os<<"\\\""; break;
- case '\\': os<<"\\\\"; break;
- case '/': os<<"\\/"; break;
- case '\b': os<<"\\b"; break;
- case '\f': os<<"\\f"; break;
- case '\n': os<<"\\n"; break;
- case '\r': os<<"\\r"; break;
- case '\t': os<<"\\t"; break;
- default:
- {
- if(c >= 32 && c <= 126)
- {
- os<<c;
- }
- else
- {
- u32 cnum = (u32) (u8) c;
- os<<"\\u"<<std::hex<<std::setw(4)<<std::setfill('0')<<cnum;
+ switch (c) {
+ case '"':
+ os << "\\\"";
+ break;
+ case '\\':
+ os << "\\\\";
+ break;
+ case '/':
+ os << "\\/";
+ break;
+ case '\b':
+ os << "\\b";
+ break;
+ case '\f':
+ os << "\\f";
+ break;
+ case '\n':
+ os << "\\n";
+ break;
+ case '\r':
+ os << "\\r";
+ break;
+ case '\t':
+ os << "\\t";
+ break;
+ default: {
+ if (c >= 32 && c <= 126) {
+ os << c;
+ } else {
+ u32 cnum = (u8)c;
+ os << "\\u" << std::hex << std::setw(4)
+ << std::setfill('0') << cnum;
}
break;
}
}
}
- os<<"\"";
+
+ os << "\"";
return os.str();
}
-// Reads a string encoded in JSON format
std::string deSerializeJsonString(std::istream &is)
{
std::ostringstream os(std::ios::binary);
@@ -171,55 +220,66 @@ std::string deSerializeJsonString(std::istream &is)
// Parse initial doublequote
is >> c;
- if(c != '"')
+ if (c != '"')
throw SerializationError("JSON string must start with doublequote");
// Parse characters
- for(;;)
- {
+ for (;;) {
c = is.get();
- if(is.eof())
+ if (is.eof())
throw SerializationError("JSON string ended prematurely");
- if(c == '"')
- {
+
+ if (c == '"') {
return os.str();
- }
- else if(c == '\\')
- {
+ } else if (c == '\\') {
c2 = is.get();
- if(is.eof())
+ if (is.eof())
throw SerializationError("JSON string ended prematurely");
- switch(c2)
- {
- default: os<<c2; break;
- case 'b': os<<'\b'; break;
- case 'f': os<<'\f'; break;
- case 'n': os<<'\n'; break;
- case 'r': os<<'\r'; break;
- case 't': os<<'\t'; break;
- case 'u':
- {
- char hexdigits[4+1];
+ switch (c2) {
+ case 'b':
+ os << '\b';
+ break;
+ case 'f':
+ os << '\f';
+ break;
+ case 'n':
+ os << '\n';
+ break;
+ case 'r':
+ os << '\r';
+ break;
+ case 't':
+ os << '\t';
+ break;
+ case 'u': {
+ int hexnumber;
+ char hexdigits[4 + 1];
+
is.read(hexdigits, 4);
- if(is.eof())
+ if (is.eof())
throw SerializationError("JSON string ended prematurely");
hexdigits[4] = 0;
+
std::istringstream tmp_is(hexdigits, std::ios::binary);
- int hexnumber;
tmp_is >> std::hex >> hexnumber;
- os<<((char)hexnumber);
+ os << (char)hexnumber;
break;
}
+ default:
+ os << c2;
+ break;
}
- }
- else
- {
- os<<c;
+ } else {
+ os << c;
}
}
+
return os.str();
}
+////
+//// String/Struct conversions
+////
bool deSerializeStringToStruct(std::string valstr,
std::string format, void *out, size_t olen)
@@ -382,7 +442,6 @@ fail:
return true;
}
-
// Casts *buf to a signed or unsigned fixed-width integer of 'w' width
#define SIGN_CAST(w, buf) (is_unsigned ? *((u##w *) buf) : *((s##w *) buf))
@@ -469,11 +528,33 @@ bool serializeStructToString(std::string *out,
*out = os.str();
// Trim off the trailing comma and space
- if (out->size() >= 2) {
+ if (out->size() >= 2)
out->resize(out->size() - 2);
- }
return true;
}
#undef SIGN_CAST
+
+////
+//// Other
+////
+
+std::string serializeHexString(const std::string &data, bool insert_spaces)
+{
+ std::string result;
+ result.reserve(data.size() * (2 + insert_spaces));
+
+ static const char hex_chars[] = "0123456789abcdef";
+
+ const size_t len = data.size();
+ for (size_t i = 0; i != len; i++) {
+ u8 byte = data[i];
+ result.push_back(hex_chars[(byte >> 4) & 0x0F]);
+ result.push_back(hex_chars[(byte >> 0) & 0x0F]);
+ if (insert_spaces && i != len - 1)
+ result.push_back(' ');
+ }
+
+ return result;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 15:45:37 +0000