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// **********************************************************************
//
// Copyright (c) 2002
// MutableRealms, Inc.
// Huntsville, AL, USA
//
// All Rights Reserved
//
// **********************************************************************
#include <IcePatch/NodeUtil.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <openssl/md5.h>
using namespace std;
using namespace Ice;
using namespace IcePatch;
ByteSeq
IcePatch::getMD5(const std::string& path)
{
//
// Stat the file to get a MD5 hash value for.
//
struct stat buf;
if (stat(path.c_str(), &buf) == -1)
{
NodeAccessException ex;
ex.reason = "cannot stat `" + path + "':" + strerror(errno);
throw ex;
}
else
{
if (!S_ISREG(buf.st_mode))
{
NodeAccessException ex;
ex.reason = "`" + path + "' is not a regular file";
throw ex;
}
}
//
// Stat the .md5 file. If it doesn't exist, or if it's outdated,
// set a flag to create a new MD5 hash value.
//
struct stat bufmd5;
string pathmd5 = path + ".md5";
unsigned char md5[16];
bool createmd5 = false;
if (stat(pathmd5.c_str(), &bufmd5) == -1)
{
if (errno == ENOENT)
{
createmd5 = true;
}
else
{
NodeAccessException ex;
ex.reason = "cannot stat `" + path + "':" + strerror(errno);
throw ex;
}
}
else
{
if (!S_ISREG(bufmd5.st_mode))
{
NodeAccessException ex;
ex.reason = "`" + path + "' is not a regular file";
throw ex;
}
if (bufmd5.st_size != 16)
{
NodeAccessException ex;
ex.reason = "`" + path + "' isn't 16 bytes in size";
throw ex;
}
if (bufmd5.st_mtime <= buf.st_mtime)
{
createmd5 = true;
}
}
if (createmd5)
{
//
// Open the original file and create a MD5 hash value
//
{
int fd = open(path.c_str(), O_RDONLY);
if (fd == -1)
{
NodeAccessException ex;
ex.reason = "cannot open `" + path + "' for reading:" + strerror(errno);
throw ex;
}
unsigned char* fileBuf = new unsigned char[buf.st_size];
try
{
int sz = read(fd, fileBuf, buf.st_size);
if (sz == -1)
{
NodeAccessException ex;
ex.reason = "cannot read `" + path + "':" + strerror(errno);
throw ex;
}
if (sz < buf.st_size)
{
NodeAccessException ex;
ex.reason = "could not read all bytes from `" + path + "'";
throw ex;
}
MD5(fileBuf, sz, md5);
close(fd);
delete [] fileBuf;
}
catch (...)
{
close(fd);
delete [] fileBuf;
throw;
}
}
//
// Write the MD5 hash value to the corresponding .md5 file.
//
{
int fd = open(pathmd5.c_str(), O_WRONLY | O_CREAT);
if (fd == -1)
{
NodeAccessException ex;
ex.reason = "cannot open `" + pathmd5 + "' for writing:" + strerror(errno);
throw ex;
}
try
{
int sz = write(fd, md5, 16);
if (sz == -1)
{
NodeAccessException ex;
ex.reason = "cannot read `" + path + "':" + strerror(errno);
throw ex;
}
if (sz < 16)
{
NodeAccessException ex;
ex.reason = "could not write 16 bytes to `" + path + "'";
throw ex;
}
close(fd);
}
catch (...)
{
close(fd);
throw;
}
}
}
else
{
//
// Read the MD5 hash value from the .md5 file.
//
int fd = open(pathmd5.c_str(), O_RDONLY);
if (fd == -1)
{
NodeAccessException ex;
ex.reason = "cannot open `" + path + "' for reading:" + strerror(errno);
throw ex;
}
try
{
int sz = read(fd, md5, 16);
if (sz == -1)
{
NodeAccessException ex;
ex.reason = "cannot read `" + path + "':" + strerror(errno);
throw ex;
}
if (sz < 16)
{
NodeAccessException ex;
ex.reason = "could not read 16 bytes from `" + path + "'";
throw ex;
}
close(fd);
}
catch (...)
{
close(fd);
throw;
}
}
//
// Convert array to byte sequence.
//
ByteSeq result;
result.resize(16);
for (int i = 0; i < 16; ++i)
{
result[i] = md5[i];
}
return result;
}
std::string
IcePatch::MD5ToString(const Ice::ByteSeq& md5)
{
if (md5.size() != 16)
{
return "illegal MD5 hash code";
}
ostringstream out;
for (int i = 0; i < 16; ++i)
{
int b = static_cast<int>(md5[i]);
if (b < 0)
{
b += 256;
}
out << hex << b;
}
return out.str();
}
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