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partly added creation of OP partial length headers

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This commit is contained in:
Werner Koch 1998-07-02 19:31:46 +00:00
parent 77a6af76d0
commit 97090f1293
17 changed files with 432 additions and 157 deletions
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57
g10/cipher.c
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@ -34,6 +34,34 @@
#include "options.h"
#define MIN_PARTIAL_SIZE 512
static void
write_header( cipher_filter_context_t *cfx, IOBUF a )
{
PACKET pkt;
PKT_encrypted ed;
byte temp[10];
memset( &ed, 0, sizeof ed );
ed.len = cfx->datalen;
init_packet( &pkt );
pkt.pkttype = PKT_ENCRYPTED;
pkt.pkt.encrypted = &ed;
if( build_packet( a, &pkt ))
log_bug("build_packet(ENCR_DATA) failed\n");
randomize_buffer( temp, 8, 1 );
temp[8] = temp[6];
temp[9] = temp[7];
cfx->cipher_hd = cipher_open( cfx->dek->algo, CIPHER_MODE_AUTO_CFB, 1 );
cipher_setkey( cfx->cipher_hd, cfx->dek->key, cfx->dek->keylen );
cipher_setiv( cfx->cipher_hd, NULL );
cipher_encrypt( cfx->cipher_hd, temp, temp, 10);
cipher_sync( cfx->cipher_hd );
iobuf_write(a, temp, 10);
cfx->header=1;
}
/****************
@ -53,35 +81,20 @@ cipher_filter( void *opaque, int control,
else if( control == IOBUFCTRL_FLUSH ) { /* encrypt */
assert(a);
if( !cfx->header ) {
PACKET pkt;
PKT_encrypted ed;
byte temp[10];
memset( &ed, 0, sizeof ed );
ed.len = cfx->datalen;
init_packet( &pkt );
pkt.pkttype = PKT_ENCRYPTED;
pkt.pkt.encrypted = &ed;
if( build_packet( a, &pkt ))
log_bug("build_packet(ENCR_DATA) failed\n");
randomize_buffer( temp, 8, 1 );
temp[8] = temp[6];
temp[9] = temp[7];
cfx->cipher_hd = cipher_open( cfx->dek->algo,
CIPHER_MODE_AUTO_CFB, 1 );
cipher_setkey( cfx->cipher_hd, cfx->dek->key, cfx->dek->keylen );
cipher_setiv( cfx->cipher_hd, NULL );
cipher_encrypt( cfx->cipher_hd, temp, temp, 10);
cipher_sync( cfx->cipher_hd );
iobuf_write(a, temp, 10);
cfx->header=1;
write_header( cfx, a );
}
cipher_encrypt( cfx->cipher_hd, buf, buf, size);
if( iobuf_write( a, buf, size ) )
rc = G10ERR_WRITE_FILE;
}
else if( control == IOBUFCTRL_FREE ) {
#if 0
if( cfx->new_partial && cfx->cfx->la_buffer ) {
}
#endif
cipher_close(cfx->cipher_hd);
m_free(cfx->la_buffer); cfx->la_buffer = NULL;
}
else if( control == IOBUFCTRL_DESC ) {
*(char**)buf = "cipher_filter";