diff options
Diffstat (limited to 'g10/cipher.c')
| -rw-r--r-- | g10/cipher.c | 73 |
1 files changed, 43 insertions, 30 deletions
diff --git a/g10/cipher.c b/g10/cipher.c index ab7c9b676..3d51a874a 100644 --- a/g10/cipher.c +++ b/g10/cipher.c @@ -1,5 +1,5 @@ /* cipher.c - En-/De-ciphering filter - * Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. + * Copyright (C) 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc. * * This file is part of GnuPG. * @@ -25,6 +25,7 @@ #include <errno.h> #include <assert.h> +#include "gpg.h" #include "errors.h" #include "iobuf.h" #include "memory.h" @@ -40,15 +41,16 @@ static void -write_header( cipher_filter_context_t *cfx, IOBUF a ) +write_header( cipher_filter_context_t *cfx, iobuf_t a ) { PACKET pkt; PKT_encrypted ed; byte temp[18]; - unsigned blocksize; - unsigned nprefix; + unsigned int blocksize; + unsigned int nprefix; + gpg_error_t rc; - blocksize = cipher_get_blocksize( cfx->dek->algo ); + blocksize = gcry_cipher_get_algo_blklen ( cfx->dek->algo ); if( blocksize < 8 || blocksize > 16 ) log_fatal("unsupported blocksize %u\n", blocksize ); @@ -58,9 +60,9 @@ write_header( cipher_filter_context_t *cfx, IOBUF a ) ed.new_ctb = !ed.len && !RFC1991; if( cfx->dek->use_mdc ) { ed.mdc_method = DIGEST_ALGO_SHA1; - cfx->mdc_hash = md_open( DIGEST_ALGO_SHA1, 0 ); + gcry_md_open (&cfx->mdc_hash, GCRY_MD_SHA1, 0 ); if ( DBG_HASHING ) - md_start_debug( cfx->mdc_hash, "creatmdc" ); + gcry_md_start_debug ( cfx->mdc_hash, "creatmdc" ); } { @@ -76,21 +78,28 @@ write_header( cipher_filter_context_t *cfx, IOBUF a ) if( build_packet( a, &pkt )) log_bug("build_packet(ENCR_DATA) failed\n"); nprefix = blocksize; - randomize_buffer( temp, nprefix, 1 ); + gcry_randomize ( temp, nprefix, GCRY_STRONG_RANDOM); temp[nprefix] = temp[nprefix-2]; temp[nprefix+1] = temp[nprefix-1]; print_cipher_algo_note( cfx->dek->algo ); - cfx->cipher_hd = cipher_open( cfx->dek->algo, - cfx->dek->use_mdc? CIPHER_MODE_CFB - : CIPHER_MODE_AUTO_CFB, 1 ); + rc = gcry_cipher_open (&cfx->cipher_hd, cfx->dek->algo, + GCRY_CIPHER_MODE_CFB, + GCRY_CIPHER_SECURE + | ((cfx->dek->use_mdc || cfx->dek->algo >= 100) ? + 0 : GCRY_CIPHER_ENABLE_SYNC)); + if (rc) { + /* we should never get an error here cause we already checked, that + * the algorithm is available. */ + BUG(); + } /* log_hexdump( "thekey", cfx->dek->key, cfx->dek->keylen );*/ - cipher_setkey( cfx->cipher_hd, cfx->dek->key, cfx->dek->keylen ); - cipher_setiv( cfx->cipher_hd, NULL, 0 ); + gcry_cipher_setkey( cfx->cipher_hd, cfx->dek->key, cfx->dek->keylen ); + gcry_cipher_setiv( cfx->cipher_hd, NULL, 0 ); /* log_hexdump( "prefix", temp, nprefix+2 ); */ if( cfx->mdc_hash ) /* hash the "IV" */ - md_write( cfx->mdc_hash, temp, nprefix+2 ); - cipher_encrypt( cfx->cipher_hd, temp, temp, nprefix+2); - cipher_sync( cfx->cipher_hd ); + gcry_md_write( cfx->mdc_hash, temp, nprefix+2 ); + gcry_cipher_encrypt( cfx->cipher_hd, temp, nprefix+2, NULL, 0); + gcry_cipher_sync( cfx->cipher_hd ); iobuf_write(a, temp, nprefix+2); cfx->header=1; } @@ -102,7 +111,7 @@ write_header( cipher_filter_context_t *cfx, IOBUF a ) */ int cipher_filter( void *opaque, int control, - IOBUF a, byte *buf, size_t *ret_len) + iobuf_t a, byte *buf, size_t *ret_len) { size_t size = *ret_len; cipher_filter_context_t *cfx = opaque; @@ -117,36 +126,40 @@ cipher_filter( void *opaque, int control, write_header( cfx, a ); } if( cfx->mdc_hash ) - md_write( cfx->mdc_hash, buf, size ); - cipher_encrypt( cfx->cipher_hd, buf, buf, size); - if( iobuf_write( a, buf, size ) ) - rc = G10ERR_WRITE_FILE; + gcry_md_write( cfx->mdc_hash, buf, size ); + gcry_cipher_encrypt( cfx->cipher_hd, buf, size, NULL, 0); + rc = iobuf_write( a, buf, size ); } else if( control == IOBUFCTRL_FREE ) { if( cfx->mdc_hash ) { byte *hash; - int hashlen = md_digest_length( md_get_algo( cfx->mdc_hash ) ); + int hashlen = gcry_md_get_algo_dlen (gcry_md_get_algo ( + cfx->mdc_hash)); byte temp[22]; assert( hashlen == 20 ); /* we must hash the prefix of the MDC packet here */ temp[0] = 0xd3; temp[1] = 0x14; - md_putc( cfx->mdc_hash, temp[0] ); - md_putc( cfx->mdc_hash, temp[1] ); + gcry_md_putc ( cfx->mdc_hash, temp[0] ); + gcry_md_putc ( cfx->mdc_hash, temp[1] ); - md_final( cfx->mdc_hash ); - hash = md_read( cfx->mdc_hash, 0 ); + gcry_md_final ( cfx->mdc_hash ); + hash = gcry_md_read ( cfx->mdc_hash, 0 ); memcpy(temp+2, hash, 20); - cipher_encrypt( cfx->cipher_hd, temp, temp, 22 ); - md_close( cfx->mdc_hash ); cfx->mdc_hash = NULL; - if( iobuf_write( a, temp, 22 ) ) + gcry_cipher_encrypt( cfx->cipher_hd, temp, 22, NULL, 0 ); + gcry_md_close ( cfx->mdc_hash ); cfx->mdc_hash = NULL; + rc = iobuf_write( a, temp, 22 ); + if (rc) log_error("writing MDC packet failed\n" ); } - cipher_close(cfx->cipher_hd); + gcry_cipher_close (cfx->cipher_hd); } else if( control == IOBUFCTRL_DESC ) { *(char**)buf = "cipher_filter"; } return rc; } + + + |