diff options
Diffstat (limited to 'cipher/cipher.c')
| -rw-r--r-- | cipher/cipher.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/cipher/cipher.c b/cipher/cipher.c index 59b6f2efb..ac77e5b02 100644 --- a/cipher/cipher.c +++ b/cipher/cipher.c @@ -48,6 +48,7 @@ struct cipher_table_s { }; static struct cipher_table_s cipher_table[TABLE_SIZE]; +static int disabled_algos[TABLE_SIZE]; struct cipher_handle_s { @@ -246,6 +247,22 @@ cipher_algo_to_string( int algo ) return NULL; } + +void +disable_cipher_algo( int algo ) +{ + int i; + + for(i=0; i < DIM(disabled_algos); i++ ) { + if( !disabled_algos[i] || disabled_algos[i] == algo ) { + disabled_algos[i] = algo; + return; + } + } + /* fixme: we should use a linked list */ + log_fatal("can't disable cipher algo %d: table full\n"); +} + /**************** * Return 0 if the cipher algo is available */ @@ -256,8 +273,13 @@ check_cipher_algo( int algo ) do { for(i=0; cipher_table[i].name; i++ ) - if( cipher_table[i].algo == algo ) - return 0; /* okay */ + if( cipher_table[i].algo == algo ) { + for(i=0; i < DIM(disabled_algos); i++ ) { + if( disabled_algos[i] == algo ) + return G10ERR_CIPHER_ALGO; + } + return 0; /* okay */ + } } while( load_cipher_modules() ); return G10ERR_CIPHER_ALGO; } |