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Changed default algo and size.
This commit is contained in:
Werner Koch
parent
c4e92c3344
commit
f61e15670a
@ -1,3 +1,12 @@
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2009-05-17 Werner Koch <wk@g10code.com>
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* keygen.c (ask_algo): Add arg R_SUBKEY_ALGO. Change return value
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semantics. Change presented order of algorithms. Make RSA+RSA
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the default.
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(generate_keypair): Adjust for change.
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(ask_keysize): Add arg PRIMARY_KEYSIZE for subkey creation.
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Change callers.
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2009-05-15 Werner Koch <wk@g10code.com>
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* keygen.c (gen_card_key_with_backup): Get the size of the key
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234
g10/keygen.c
234
g10/keygen.c
@ -1636,94 +1636,141 @@ ask_key_flags(int algo,int subkey)
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}
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/****************
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* Returns: 0 to create both a DSA and a Elgamal key.
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* and only if key flags are to be written the desired usage.
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*/
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/* Ask for an algorithm. The function returns the algorithm id to
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* create. If ADDMODE is false the function won't show an option to
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* create the primary and subkey combined and won't set R_USAGE
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* either. If a combined algorithm has been selected, the subkey
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* algorithm is stored at R_SUBKEY_ALGO. */
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static int
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ask_algo (int addmode, unsigned int *r_usage)
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ask_algo (int addmode, int *r_subkey_algo, unsigned int *r_usage)
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{
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char *answer;
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int algo;
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char *answer;
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int algo;
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int dummy_algo;
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*r_usage = 0;
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tty_printf(_("Please select what kind of key you want:\n"));
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if( !addmode )
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tty_printf(_(" (%d) DSA and Elgamal (default)\n"), 1 );
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tty_printf( _(" (%d) DSA (sign only)\n"), 2 );
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if (opt.expert)
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tty_printf( _(" (%d) DSA (set your own capabilities)\n"), 3 );
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if( addmode )
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tty_printf(_(" (%d) Elgamal (encrypt only)\n"), 4 );
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tty_printf( _(" (%d) RSA (sign only)\n"), 5 );
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if (addmode)
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tty_printf(_(" (%d) RSA (encrypt only)\n"), 6 );
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if (opt.expert)
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tty_printf( _(" (%d) RSA (set your own capabilities)\n"), 7 );
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if (!r_subkey_algo)
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r_subkey_algo = &dummy_algo;
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tty_printf (_("Please select what kind of key you want:\n"));
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for(;;) {
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answer = cpr_get("keygen.algo",_("Your selection? "));
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cpr_kill_prompt();
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algo = *answer? atoi(answer): 1;
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xfree(answer);
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if( algo == 1 && !addmode ) {
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algo = 0; /* create both keys */
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break;
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}
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else if( algo == 7 && opt.expert ) {
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algo = PUBKEY_ALGO_RSA;
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*r_usage=ask_key_flags(algo,addmode);
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break;
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}
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else if( algo == 6 && addmode ) {
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algo = PUBKEY_ALGO_RSA;
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*r_usage = PUBKEY_USAGE_ENC;
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break;
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}
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else if( algo == 5 ) {
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algo = PUBKEY_ALGO_RSA;
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*r_usage = PUBKEY_USAGE_SIG;
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break;
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}
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else if( algo == 4 && addmode ) {
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algo = PUBKEY_ALGO_ELGAMAL_E;
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*r_usage = PUBKEY_USAGE_ENC;
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break;
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}
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else if( algo == 3 && opt.expert ) {
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algo = PUBKEY_ALGO_DSA;
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*r_usage=ask_key_flags(algo,addmode);
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break;
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}
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else if( algo == 2 ) {
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algo = PUBKEY_ALGO_DSA;
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*r_usage = PUBKEY_USAGE_SIG;
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break;
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}
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else
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tty_printf(_("Invalid selection.\n"));
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if (!addmode)
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tty_printf (_(" (%d) RSA and RSA (default)\n"), 1 );
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if (!addmode)
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tty_printf (_(" (%d) DSA and Elgamal\n"), 2 );
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tty_printf (_(" (%d) DSA (sign only)\n"), 3 );
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tty_printf (_(" (%d) RSA (sign only)\n"), 4 );
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if (addmode)
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{
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tty_printf (_(" (%d) Elgamal (encrypt only)\n"), 5 );
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tty_printf (_(" (%d) RSA (encrypt only)\n"), 6 );
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}
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return algo;
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if (opt.expert)
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{
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tty_printf (_(" (%d) DSA (set your own capabilities)\n"), 7 );
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tty_printf (_(" (%d) RSA (set your own capabilities)\n"), 8 );
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}
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for(;;)
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{
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*r_usage = 0;
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*r_subkey_algo = 0;
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answer = cpr_get ("keygen.algo", _("Your selection? "));
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cpr_kill_prompt ();
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algo = *answer? atoi (answer) : 1;
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xfree(answer);
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if (algo == 1 && !addmode)
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{
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algo = PUBKEY_ALGO_RSA;
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*r_subkey_algo = PUBKEY_ALGO_RSA;
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break;
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}
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else if (algo == 2 && !addmode)
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{
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algo = PUBKEY_ALGO_DSA;
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*r_subkey_algo = PUBKEY_ALGO_ELGAMAL_E;
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break;
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}
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else if (algo == 3)
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{
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algo = PUBKEY_ALGO_DSA;
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*r_usage = PUBKEY_USAGE_SIG;
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break;
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}
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else if (algo == 4)
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{
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algo = PUBKEY_ALGO_RSA;
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*r_usage = PUBKEY_USAGE_SIG;
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break;
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}
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else if (algo == 5 && addmode)
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{
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algo = PUBKEY_ALGO_ELGAMAL_E;
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*r_usage = PUBKEY_USAGE_ENC;
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break;
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}
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else if (algo == 6 && addmode)
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{
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algo = PUBKEY_ALGO_RSA;
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*r_usage = PUBKEY_USAGE_ENC;
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break;
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}
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else if (algo == 7 && opt.expert)
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{
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algo = PUBKEY_ALGO_DSA;
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*r_usage = ask_key_flags (algo, addmode);
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break;
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}
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else if (algo == 8 && opt.expert)
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{
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algo = PUBKEY_ALGO_RSA;
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*r_usage = ask_key_flags (algo, addmode);
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break;
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}
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else
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tty_printf (_("Invalid selection.\n"));
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}
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return algo;
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}
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/* Ask for the key size. ALGO is the algorithjm. If PRIMARY_KEYSIZE
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is not 0, the function asks for the size of the encryption
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subkey. */
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static unsigned
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ask_keysize( int algo )
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ask_keysize (int algo, unsigned int primary_keysize)
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{
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unsigned int nbits, min, def=2048, max=4096;
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int for_subkey = !!primary_keysize;
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int autocomp = 0;
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if(opt.expert)
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min=512;
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else
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min=1024;
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if (primary_keysize && !opt.expert)
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{
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/* Deduce the subkey size from the primary key size. */
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if (algo == PUBKEY_ALGO_DSA && primary_keysize > 3072)
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nbits = 3072; /* For performance reasons we don't support more
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than 3072 bit DSA. However we won't see this
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case anyway because DSA can't be used as an
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encryption subkey ;-). */
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else
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nbits = primary_keysize;
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autocomp = 1;
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goto leave;
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}
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switch(algo)
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{
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case PUBKEY_ALGO_DSA:
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if(opt.flags.dsa2)
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{
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def=1024;
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def=2048;
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max=3072;
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}
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else
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@ -1743,18 +1790,16 @@ ask_keysize( int algo )
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for(;;)
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{
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char *prompt,*answer;
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char *prompt, *answer;
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#define PROMPTSTRING _("What keysize do you want? (%u) ")
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prompt=xmalloc(strlen(PROMPTSTRING)+20);
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sprintf(prompt,PROMPTSTRING,def);
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#undef PROMPTSTRING
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answer = cpr_get("keygen.size",prompt);
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cpr_kill_prompt();
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nbits = *answer? atoi(answer): def;
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if (for_subkey)
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prompt = xasprintf (_("What keysize do you want "
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"for the subkey? (%u) "), def);
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else
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prompt = xasprintf (_("What keysize do you want? (%u) "), def);
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answer = cpr_get ("keygen.size", prompt);
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cpr_kill_prompt ();
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nbits = *answer? atoi (answer): def;
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xfree(prompt);
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xfree(answer);
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@ -1767,15 +1812,18 @@ ask_keysize( int algo )
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tty_printf(_("Requested keysize is %u bits\n"), nbits );
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leave:
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if( algo == PUBKEY_ALGO_DSA && (nbits % 64) )
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{
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nbits = ((nbits + 63) / 64) * 64;
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tty_printf(_("rounded up to %u bits\n"), nbits );
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if (!autocomp)
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tty_printf(_("rounded up to %u bits\n"), nbits );
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}
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else if( (nbits % 32) )
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{
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nbits = ((nbits + 31) / 32) * 32;
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tty_printf(_("rounded up to %u bits\n"), nbits );
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if (!autocomp)
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tty_printf(_("rounded up to %u bits\n"), nbits );
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}
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return nbits;
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@ -3003,16 +3051,19 @@ generate_keypair (const char *fname, const char *card_serialno,
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}
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else
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{
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algo = ask_algo( 0, &use );
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if( !algo )
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{ /* default: DSA with ElG subkey of the specified size */
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int subkey_algo;
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algo = ask_algo (0, &subkey_algo, &use);
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if (subkey_algo)
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{
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/* Create primary and subkey at once. */
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both = 1;
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r = xmalloc_clear( sizeof *r + 20 );
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r->key = pKEYTYPE;
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sprintf( r->u.value, "%d", PUBKEY_ALGO_DSA );
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sprintf( r->u.value, "%d", algo );
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r->next = para;
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para = r;
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nbits = ask_keysize( PUBKEY_ALGO_DSA );
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nbits = ask_keysize (algo, 0);
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r = xmalloc_clear( sizeof *r + 20 );
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r->key = pKEYLENGTH;
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sprintf( r->u.value, "%u", nbits);
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@ -3024,10 +3075,9 @@ generate_keypair (const char *fname, const char *card_serialno,
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r->next = para;
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para = r;
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algo = PUBKEY_ALGO_ELGAMAL_E;
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r = xmalloc_clear( sizeof *r + 20 );
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r->key = pSUBKEYTYPE;
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sprintf( r->u.value, "%d", algo );
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sprintf( r->u.value, "%d", subkey_algo);
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r->next = para;
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para = r;
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r = xmalloc_clear( sizeof *r + 20 );
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@ -3055,10 +3105,10 @@ generate_keypair (const char *fname, const char *card_serialno,
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r->next = para;
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para = r;
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}
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nbits = 0;
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}
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nbits = ask_keysize( algo );
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nbits = ask_keysize (algo, nbits);
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r = xmalloc_clear( sizeof *r + 20 );
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r->key = both? pSUBKEYLENGTH : pKEYLENGTH;
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sprintf( r->u.value, "%u", nbits);
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@ -3658,9 +3708,9 @@ generate_subkeypair (KBNODE pub_keyblock, KBNODE sec_keyblock)
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if (rc)
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goto leave;
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algo = ask_algo (1, &use);
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algo = ask_algo (1, NULL, &use);
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assert (algo);
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nbits = ask_keysize (algo);
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nbits = ask_keysize (algo, 0);
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expire = ask_expire_interval (0, NULL);
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if (!cpr_enabled() && !cpr_get_answer_is_yes("keygen.sub.okay",
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_("Really create? (y/N) ")))
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@ -4017,8 +4067,8 @@ gen_card_key_with_backup (int algo, int keyno, int is_primary,
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mode_t oldmask;
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keyid_from_sk (sk, NULL);
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sprintf (name_buffer,"sk_%08lX%08lX.gpg",
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(ulong)sk->keyid[0], (ulong)sk->keyid[1]);
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snprintf (name_buffer, sizeof name_buffer, "sk_%08lX%08lX.gpg",
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(ulong)sk->keyid[0], (ulong)sk->keyid[1]);
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fname = make_filename (backup_dir, name_buffer, NULL);
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oldmask = umask (077);
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