Git-Mirrors/monero
1
0
Fork 0
mirror of https://github.com/monero-project/monero.git synced 2025-08-22 07:39:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

ensure no NULL is passed to memcpy

Browse source 
NULL is valid when size is 0, but memcpy uses nonnull attributes,
so let's not poke the bear
This commit is contained in:
moneromooo-monero 2019-04-29 08:17:32 +00:00
parent bc09766bf9
commit 0564da5fdc
No known key found for this signature in database
GPG key ID: 686F07454D6CEFC3
4 changed files with 18 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

17
contrib/epee/src/wipeable_string.cpp
View file

@ -62,13 +62,15 @@ wipeable_string::wipeable_string(wipeable_string &&other)
wipeable_string::wipeable_string(const std::string &other)
{
grow(other.size());
memcpy(buffer.data(), other.c_str(), size());
if (size() > 0)
memcpy(buffer.data(), other.c_str(), size());
}
wipeable_string::wipeable_string(std::string &&other)
{
grow(other.size());
memcpy(buffer.data(), other.c_str(), size());
if (size() > 0)
memcpy(buffer.data(), other.c_str(), size());
if (!other.empty())
{
memwipe(&other[0], other.size()); // we're kinda left with this again aren't we
@ -79,7 +81,8 @@ wipeable_string::wipeable_string(std::string &&other)
wipeable_string::wipeable_string(const char *s)
{
grow(strlen(s));
memcpy(buffer.data(), s, size());
if (size() > 0)
memcpy(buffer.data(), s, size());
}
wipeable_string::wipeable_string(const char *s, size_t len)
@ -112,14 +115,18 @@ void wipeable_string::grow(size_t sz, size_t reserved)
}
size_t old_sz = buffer.size();
std::unique_ptr<char[]> tmp{new char[old_sz]};
memcpy(tmp.get(), buffer.data(), old_sz * sizeof(char));
if (old_sz > 0)
{
memcpy(tmp.get(), buffer.data(), old_sz * sizeof(char));
memwipe(buffer.data(), old_sz * sizeof(char));
}
buffer.reserve(reserved);
buffer.resize(sz);
memcpy(buffer.data(), tmp.get(), old_sz * sizeof(char));
if (old_sz > 0)
{
memcpy(buffer.data(), tmp.get(), old_sz * sizeof(char));
memwipe(tmp.get(), old_sz * sizeof(char));
}
}
void wipeable_string::push_back(char c)