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#include <stdlib.h>
#include <sys/stat.h>
#include <syslog.h>
#include <iostream>
#include <cassert>
#include <stdexcept>
#include <algorithm>
#include <numeric>
#include <openssl/md5.h>
#include "eyetil.h"
#include "config.h"
#ifdef HAVE_LIBUUID
# include <uuid/uuid.h>
#endif
binary_t& binary_t::from_hex(const std::string& h) {
std::string::size_type hs = h.length();
if(hs&1)
throw std::runtime_error("odd number of characters in hexadecimal number");
size_t rvs = hs>>1;
resize(rvs);
const unsigned char *hp = (const unsigned char*)h.data();
iterator oi=begin();
char t[3] = { 0,0,0 };
for(size_t i=0;i<rvs;++i) {
t[0]=*(hp++); t[1]=*(hp++);
*(oi++) = static_cast<binary_t::value_type>(0xff&strtol(t,0,16));
}
return *this;
}
binary_t& binary_t::from_data(const void *d,size_t s) {
resize(s);
std::copy((const unsigned char*)d,(const unsigned char *)d+s,
begin() );
return *this;
}
binary_t& binary_t::make_nonce() {
#ifdef HAVE_LIBUUID
uuid_t uuid;
uuid_generate(uuid);
from_data((unsigned char*)uuid,sizeof(uuid));
#else
resize(16);
std::generate_n(begin(),16,rand);
#endif /* HAVE_LIBUUID */
return *this;
}
std::string binary_t::hex() const {
std::string rv;
rv.reserve((size()<<1)+1);
char t[3] = {0,0,0};
for(const_iterator i=begin(),ie=end();i!=ie;++i) {
size_t rc = snprintf(t,sizeof(t),"%02x",*i);
assert(rc<sizeof(t));
rv += t;
}
return rv;
}
binary_t binary_t::md5() const {
binary_t rv(MD5_DIGEST_LENGTH);
if(!MD5(
(const unsigned char*)&(front()),size(),
(unsigned char*)&(rv.front()) ))
throw std::runtime_error("failed to md5()");
return rv;
}
void md5_digester::init() {
if(!MD5_Init(&ctx)) throw std::runtime_error("failed to MD5_Init()");
}
void md5_digester::update(const void *d,size_t l) {
if(!MD5_Update(&ctx,d,l)) throw std::runtime_error("failed to MD5_Update()");
}
binary_t md5_digester::final() {
binary_t rv(MD5_DIGEST_LENGTH);
if(!MD5_Final((unsigned char*)&(rv.front()), &ctx))
throw std::runtime_error("failed to MD5_Final()");
return rv;
}
static void make_path_for_template(const std::string& p,mode_t m) {
struct stat st;
std::string pp;
for(std::string::size_type sl=p.find('/',1);
sl!=std::string::npos;
sl=p.find('/',sl+1)) {
if(stat( (pp=p.substr(0,sl)).c_str() ,&st)
|| !S_ISDIR(st.st_mode)) {
if(mkdir(pp.c_str(),m))
throw std::runtime_error("failed to mkdir()");
}
}
}
tmpdir_t::tmpdir_t(const std::string& dt) : dir(dt) {
make_path_for_template(dt,0777);
if(!mkdtemp((char*)dir.data()))
throw std::runtime_error("failed to mkdtmp()");
}
tmpdir_t::~tmpdir_t() {
assert(!dir.empty());
if(rmdir(dir.c_str())) {
syslog(LOG_WARNING,"Failed to remove '%s' directory",dir.c_str());
}
}
std::string tmpdir_t::get_file(const std::string& f) {
std::string::size_type ls = f.rfind('/');
return dir+'/'+(
(ls==std::string::npos)
? f
: f.substr(ls+1)
);
}
tarchive_t::tarchive_t(void *p,size_t s) : a(archive_read_new()), e(0) {
if(!a) throw std::runtime_error("failed to archive_read_new()");
if(archive_read_support_format_tar(a)) {
archive_read_finish(a);
throw std::runtime_error("failed to archive_read_support_format_tar()");
}
if(archive_read_open_memory(a,p,s)) {
archive_read_finish(a);
throw std::runtime_error("failed to archive_read_open_memory()");
}
}
tarchive_t::~tarchive_t() {
assert(a);
archive_read_finish(a);
}
bool tarchive_t::read_next_header() {
assert(a);
return archive_read_next_header(a,&e)==ARCHIVE_OK;
}
std::string tarchive_t::entry_pathname() {
assert(a); assert(e);
return archive_entry_pathname(e);
}
bool tarchive_t::read_data_into_fd(int fd) {
assert(a);
return archive_read_data_into_fd(a,fd)==ARCHIVE_OK;
}
#pragma pack(1)
struct block512_t {
enum { words = 512 / sizeof(uint16_t) };
uint16_t data[words];
static uint16_t tcpcksum(block512_t& data) {
uint32_t sum = std::accumulate(data.data,data.data+words,0);
while(uint32_t hw = sum>>16) sum = (sum&0xffff)+hw;
return 0xffff&~sum;
}
};
#pragma pack()
binary_t integrity_digest(const void *ptr,size_t size,const std::string& ukey) {
md5_digester rv;
std::transform( (block512_t*)ptr, ((block512_t*)ptr)+size/sizeof(block512_t),
rv.updater<uint16_t>(), block512_t::tcpcksum );
rv.update( binary_t(ukey) );
return rv.final();
}
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