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mkpkg.cpp
291 lines (260 loc) · 6.91 KB
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mkpkg.cpp
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// ----------------------------------------------------------------------------
// mkpkg.cpp - Create package file
// ----------------------------------------------------------------------------
#include <sys/stat.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <arpa/inet.h>
#include <openssl/pem.h>
#include <openssl/evp.h>
#include <openssl/rsa.h>
#include <openssl/sha.h>
#include <string>
#include <list>
#include "common.h"
#include "fd.h"
#include "crc.h"
// ----------------------------------------------------------------------------
// function prototypes
// ----------------------------------------------------------------------------
static bool add_file( std::string &image, int fd, SHA256_CTX &sha256, entry_t &entry );
extern "C" {
extern char _binary_installer_bin_start[];
extern char _binary_installer_bin_end[];
extern char _binary_installer_bin_size[];
};
static int password_cb( char *buf, int size, int rwflag, void *userdata )
{
if( 0 == userdata )
return -1;
std::string &pass = *(std::string *)userdata;
return snprintf( buf, size, "%s", pass.c_str() );
}
// ----------------------------------------------------------------------------
// main()
// ----------------------------------------------------------------------------
int main( int argc, const char **argv )
{
typedef std::list< std::string > file_list_t;
file_list_t files;
std::string pkg_file, cert_file, key_pass;
for( int i = 1; i < argc; i++ )
{
if( 0 == strcmp( argv[ i ], "-V" ))
{
printf( "mkpkg v%s\n", VERSION );
return 0;
}
else if( 0 == strcmp( argv[ i ], "-k" ))
{
if( argc == ++i )
{
printf( "-k: missing argument\n" );
return 1;
}
cert_file = argv[ i ];
}
else if( 0 == strcmp( argv[ i ], "-p" ))
{
if( argc == ++i )
{
printf( "-p: missing argument\n" );
return 1;
}
key_pass = argv[ i ];
}
else if( 0 == strcmp( argv[ i ], "-o" ))
{
if( argc == ++i )
{
printf( "-o: missing argument\n" );
return 1;
}
pkg_file = argv[ i ];
}
else
files.push_back( argv[ i ] );
}
if( pkg_file.empty() )
{
printf( "Missing package file name\n" );
return 1;
}
if( cert_file.empty() )
printf( " *** Package will not be signed ***\n" );
if( files.empty() )
{
printf( "Missing package image files\n" );
return 1;
}
OpenSSL_add_all_algorithms();
// Load signing certificate
X509 *cert = 0;
RSA *key = 0;
if( !cert_file.empty() )
{
FILE *fp = fopen( cert_file.c_str(), "r" );
if( 0 == fp )
{
printf( "Failed to open signing cert: %s\n", cert_file.c_str() );
return 1;
}
cert = PEM_read_X509( fp, 0, 0, 0 );
key = PEM_read_RSAPrivateKey( fp, 0, password_cb, &key_pass );
if( 0 == cert || 0 == key )
{
printf( "Failed to read signing cert\n" );
return false;
}
}
// Open the output file for writing
wpt::fd fd;
fd = open( pkg_file.c_str(), O_CREAT | O_RDWR | O_TRUNC, 0744 );
if( !fd )
{
printf( "open( %s ) failed: (%i) %m\n", pkg_file.c_str(), errno );
return 1;
}
// Begin hash
SHA256_CTX sha256;
memset( &sha256, 0, sizeof( sha256 ));
SHA256_Init( &sha256 );
// Write out installer...
printf( "Writing installer.bin ... " );
char *installer_data = _binary_installer_bin_start;
unsigned int installer_size = (unsigned int)(unsigned long)&_binary_installer_bin_size;
if( installer_size != write( fd, installer_data, installer_size ) )
{
printf( "write() failed: (%i) %m\n", errno );
unlink( pkg_file.c_str() );
return 1;
}
SHA256_Update( &sha256, installer_data, installer_size );
printf( "done\n" );
// Write out the files
typedef std::list< entry_t > index_t;
index_t index;
for( file_list_t::iterator iter = files.begin(); iter != files.end(); iter++ )
{
std::string::size_type p = iter->find_first_of( ":" );
std::string file = ( p != std::string::npos ? iter->substr( 0, p ) : *iter );
std::string name = ( p != std::string::npos ? iter->substr( p + 1 ) : basename( iter->c_str() ) );
entry_t entry;
memset( &entry, 0, sizeof( entry ));
snprintf( entry.name, sizeof( entry.name ), "%s", name.c_str() );
printf( "Writing %s => %s ... ", file.c_str(), name.c_str() );
if( !add_file( file, fd, sha256, entry ))
{
unlink( pkg_file.c_str() );
return 1;
}
index.push_back( entry );
printf( "done\n" );
}
// write out index
printf( "Writing index ... " );
unsigned int index_offset = lseek( fd, 0, SEEK_CUR );
for( index_t::iterator i = index.begin(); i != index.end(); i++ )
{
entry_t &entry = *i;
if( sizeof( entry ) != write( fd, &entry, sizeof( entry )))
{
unlink( pkg_file.c_str() );
return 1;
}
SHA256_Update( &sha256, &entry, sizeof( entry ) );
}
printf( "done\n" );
// Write signing certificate
if( cert )
{
printf( "Writing signing certificate ... " );
unsigned char cert_buffer[ 2048 ];
unsigned char *p = cert_buffer;
int len = i2d_X509( cert, &p );
if( -1 == write( fd, cert_buffer, len ))
{
printf( "write() failed: (%i) %m\n", errno );
unlink( pkg_file.c_str() );
return 1;
}
SHA256_Update( &sha256, cert_buffer, len );
X509_free( cert );
printf( "done\n" );
}
// Add the footer
printf( "Writing footer ... " );
footer_t footer;
memset( &footer, 0, sizeof( footer ));
footer.ident = FTR_IDENT_V2;
footer.index_offset = index_offset;
footer.index_count = index.size();
unsigned char hash[ 32 ];
SHA256_Final( hash, &sha256 );
// Sign
if( key )
{
unsigned int sig_size = 0;
int ret = RSA_sign( NID_sha1, hash, sizeof( hash ), footer.sig, &sig_size, key );
RSA_free( key );
if( 0 == ret )
{
printf( "RSA_sign() failed\n" );
unlink( pkg_file.c_str() );
return 1;
}
}
footer.crc = ntohl( crc32( &footer, sizeof( footer ) - 4 ) );
if( sizeof( footer_t ) != write( fd, &footer, sizeof( footer )) )
{
printf( "write() failed: (%i) %m\n", errno );
unlink( pkg_file.c_str() );
return 1;
}
printf( "done\n" );
// done
return 0;
}
bool add_file( std::string &image, int fd, SHA256_CTX &sha256, entry_t &entry )
{
wpt::fd img;
img = open( image.c_str(), O_RDONLY );
if( !img )
{
printf( "open( %s ) failed: (%i) %m\n", image.c_str(), errno );
return false;
}
struct stat st;
if( -1 == fstat( img, &st ))
{
printf( "fstat( %s ) failed: (%i) %m\n", image.c_str(), errno );
return false;
}
entry.size = st.st_size;
if( st.st_mode & ( S_IXUSR | S_IXGRP | S_IXOTH ))
entry.flags = FLAG_EXEC;
entry.offset = lseek( fd, 0, SEEK_CUR );
// Read source file chunk at a time, hashing it, then writing out to destination file.
while( true )
{
unsigned char buffer[ 8192 ];
ssize_t bytes_read = read( img, buffer, sizeof( buffer ));
if( -1 == bytes_read )
{
printf( "read() failed: (%i) %m\n", errno );
return false;
}
if( bytes_read == 0 )
break;
SHA256_Update( &sha256, buffer, bytes_read );
if( bytes_read != write( fd, buffer, bytes_read ) )
{
printf( "write() failed: (%i) %m\n", errno );
return false;
}
}
return true;
}