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Add a fast non-cryptographic PRNG.

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This commit is contained in:
Adam Ierymenko 2013-07-13 13:26:27 -04:00
parent c6dd5b239f
commit 3e49337d9a
10 changed files with 107 additions and 20 deletions
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7
node/Node.cpp
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@ -193,8 +193,11 @@ Node::ReasonForTermination Node::run()
std::string ovsPath(_r->homePath + ZT_PATH_SEPARATOR_S + "thisdeviceismine");
if (((Utils::now() - Utils::getLastModified(ovsPath.c_str())) >= ZT_OVS_GENERATE_NEW_IF_OLDER_THAN)||(!Utils::readFile(ovsPath.c_str(),_r->ownershipVerificationSecret))) {
_r->ownershipVerificationSecret = "";
for(unsigned int i=0;i<24;++i)
_r->ownershipVerificationSecret.push_back("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"[Utils::randomInt<unsigned int>() % 62]);
unsigned int securern = 0;
for(unsigned int i=0;i<24;++i) {
Utils::getSecureRandom(&securern,sizeof(securern));
_r->ownershipVerificationSecret.push_back("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"[securern % 62]);
}
_r->ownershipVerificationSecret.append(ZT_EOL_S);
if (!Utils::writeFile(ovsPath.c_str(),_r->ownershipVerificationSecret))
return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,"could not write 'thisdeviceismine' (home path not writable?)");