static int
do_pubkey_enc( IOBUF out, int ctb, PKT_pubkey_enc *enc )
{
int rc = 0;
int n, i;
IOBUF a = iobuf_temp();
write_version( a, ctb );
if ( enc->throw_keyid )
{
write_32(a, 0 ); /* Don't tell Eve who can decrypt the message. */
write_32(a, 0 );
}
else
{
write_32(a, enc->keyid[0] );
write_32(a, enc->keyid[1] );
}
iobuf_put(a,enc->pubkey_algo );
n = pubkey_get_nenc( enc->pubkey_algo );
if ( !n )
write_fake_data( a, enc->data[0] );
for (i=0; i < n && !rc ; i++ )
rc = mpi_write(a, enc->data[i] );
if (!rc)
{
write_header(out, ctb, iobuf_get_temp_length(a) );
rc = iobuf_write_temp( out, a );
}
iobuf_close(a);
return rc;
}
static int
do_symkey_enc( IOBUF out, int ctb, PKT_symkey_enc *enc )
{
int rc = 0;
IOBUF a = iobuf_temp();
assert( enc->version == 4 );
switch( enc->s2k.mode ) {
case 0: case 1: case 3: break;
default: log_bug("do_symkey_enc: s2k=%d\n", enc->s2k.mode );
}
iobuf_put( a, enc->version );
iobuf_put( a, enc->cipher_algo );
iobuf_put( a, enc->s2k.mode );
iobuf_put( a, enc->s2k.hash_algo );
if( enc->s2k.mode == 1 || enc->s2k.mode == 3 ) {
iobuf_write(a, enc->s2k.salt, 8 );
if( enc->s2k.mode == 3 )
iobuf_put(a, enc->s2k.count);
}
if( enc->seskeylen )
iobuf_write(a, enc->seskey, enc->seskeylen );
write_header(out, ctb, iobuf_get_temp_length(a) );
rc = iobuf_write_temp( out, a );
iobuf_close(a);
return rc;
}
static int
do_public_key( IOBUF out, int ctb, PKT_public_key *pk )
{
int rc = 0;
int n, i;
IOBUF a = iobuf_temp();
if( !pk->version )
iobuf_put( a, 3 );
else
iobuf_put( a, pk->version );
write_32(a, pk->timestamp );
if( pk->version < 4 ) {
u16 ndays;
if( pk->expiredate )
ndays = (u16)((pk->expiredate - pk->timestamp) / 86400L);
else
ndays = 0;
write_16(a, ndays );
}
iobuf_put(a, pk->pubkey_algo );
n = pubkey_get_npkey( pk->pubkey_algo );
if( !n )
write_fake_data( a, pk->pkey[0] );
for(i=0; i < n; i++ )
mpi_write(a, pk->pkey[i] );
write_header2(out, ctb, iobuf_get_temp_length(a), pk->hdrbytes, 1 );
if( iobuf_write_temp( out, a ) )
rc = G10ERR_WRITE_FILE;
iobuf_close(a);
return rc;
}
static int
do_public_key( IOBUF out, int ctb, PKT_public_key *pk )
{
int rc = 0;
int n, i;
IOBUF a = iobuf_temp();
if ( !pk->version )
iobuf_put( a, 3 );
else
iobuf_put( a, pk->version );
write_32(a, pk->timestamp );
if ( pk->version < 4 )
{
u16 ndays;
if ( pk->expiredate )
ndays = (u16)((pk->expiredate - pk->timestamp) / 86400L);
else
ndays = 0;
write_16(a, ndays );
}
iobuf_put (a, pk->pubkey_algo );
if ( pk->pubkey_algo == PUBKEY_ALGO_NTRU){
rc = sexp_write(a, pk->ntru_pkey);
}
else
{
n = pubkey_get_npkey ( pk->pubkey_algo );
if ( !n )
write_fake_data( a, pk->pkey[0] );
}
if (!rc)
{
write_header2 (out, ctb, iobuf_get_temp_length(a), pk->hdrbytes);
printf("write output\n");
rc = iobuf_write_temp ( out, a );
}
printf("finished writing\n");
iobuf_close(a);
return rc;
}
static int
do_secret_key( IOBUF out, int ctb, PKT_secret_key *sk )
{
int rc = 0;
int i, nskey, npkey;
IOBUF a = iobuf_temp(); /* Build in a self-enlarging buffer. */
/* Write the version number - if none is specified, use 3 */
if ( !sk->version )
iobuf_put ( a, 3 );
else
iobuf_put ( a, sk->version );
write_32 (a, sk->timestamp );
/* v3 needs the expiration time. */
if ( sk->version < 4 )
{
u16 ndays;
if ( sk->expiredate )
ndays = (u16)((sk->expiredate - sk->timestamp) / 86400L);
else
ndays = 0;
write_16(a, ndays);
}
iobuf_put (a, sk->pubkey_algo );
/* Get number of secret and public parameters. They are held in one
array first the public ones, then the secret ones. */
nskey = pubkey_get_nskey ( sk->pubkey_algo );
npkey = pubkey_get_npkey ( sk->pubkey_algo );
/* If we don't have any public parameters - which is the case if we
don't know the algorithm used - the parameters are stored as one
blob in a faked (opaque) MPI. */
if ( !npkey )
{
write_fake_data( a, sk->skey[0] );
goto leave;
}
assert ( npkey < nskey );
/* Writing the public parameters is easy. */
for (i=0; i < npkey; i++ )
if ((rc = mpi_write (a, sk->skey[i])))
goto leave;
/* Build the header for protected (encrypted) secret parameters. */
if ( sk->is_protected )
{
if ( is_RSA(sk->pubkey_algo)
&& sk->version < 4
&& !sk->protect.s2k.mode )
{
/* The simple rfc1991 (v3) way. */
iobuf_put (a, sk->protect.algo );
iobuf_write (a, sk->protect.iv, sk->protect.ivlen );
}
else
{
/* OpenPGP protection according to rfc2440. */
iobuf_put(a, sk->protect.sha1chk? 0xfe : 0xff );
iobuf_put(a, sk->protect.algo );
if ( sk->protect.s2k.mode >= 1000 )
{
/* These modes are not possible in OpenPGP, we use them
to implement our extensions, 101 can be seen as a
private/experimental extension (this is not specified
in rfc2440 but the same scheme is used for all other
algorithm identifiers) */
iobuf_put(a, 101 );
iobuf_put(a, sk->protect.s2k.hash_algo );
iobuf_write(a, "GNU", 3 );
iobuf_put(a, sk->protect.s2k.mode - 1000 );
}
else
{
iobuf_put(a, sk->protect.s2k.mode );
iobuf_put(a, sk->protect.s2k.hash_algo );
}
if ( sk->protect.s2k.mode == 1
|| sk->protect.s2k.mode == 3 )
iobuf_write (a, sk->protect.s2k.salt, 8 );
if ( sk->protect.s2k.mode == 3 )
iobuf_put (a, sk->protect.s2k.count );
/* For our special modes 1001, 1002 we do not need an IV. */
if ( sk->protect.s2k.mode != 1001
&& sk->protect.s2k.mode != 1002 )
iobuf_write (a, sk->protect.iv, sk->protect.ivlen );
}
}
else
iobuf_put (a, 0 );
if ( sk->protect.s2k.mode == 1001 )
; /* GnuPG extension - don't write a secret key at all. */
else if ( sk->protect.s2k.mode == 1002 )
{
/* GnuPG extension - divert to OpenPGP smartcard. */
iobuf_put(a, sk->protect.ivlen ); /* Length of the serial number
or 0 for no serial
number. */
/* The serial number gets stored in the IV field. */
iobuf_write(a, sk->protect.iv, sk->protect.ivlen);
}
else if ( sk->is_protected && sk->version >= 4 )
{
/* The secret key is protected - write it out as it is. */
byte *p;
unsigned int ndatabits;
assert (gcry_mpi_get_flag (sk->skey[npkey], GCRYMPI_FLAG_OPAQUE));
p = gcry_mpi_get_opaque (sk->skey[npkey], &ndatabits );
iobuf_write (a, p, (ndatabits+7)/8 );
}
else if ( sk->is_protected )
{
/* The secret key is protected the old v4 way. */
for ( ; i < nskey; i++ )
{
byte *p;
unsigned int ndatabits;
assert (gcry_mpi_get_flag (sk->skey[i], GCRYMPI_FLAG_OPAQUE));
p = gcry_mpi_get_opaque (sk->skey[i], &ndatabits);
iobuf_write (a, p, (ndatabits+7)/8);
}
write_16(a, sk->csum );
}
else
{
/* Non-protected key. */
for ( ; i < nskey; i++ )
if ( (rc = mpi_write (a, sk->skey[i])))
goto leave;
write_16 (a, sk->csum );
}
leave:
if (!rc)
{
/* Build the header of the packet - which we must do after
writing all the other stuff, so that we know the length of
the packet */
write_header2(out, ctb, iobuf_get_temp_length(a), sk->hdrbytes);
/* And finally write it out the real stream */
rc = iobuf_write_temp( out, a );
}
iobuf_close(a); /* Close the remporary buffer */
return rc;
}