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gpg: default to 3072-bit RSA keys.

Browse source 
* agent/command.c (hlp_genkey): update help text to suggest the use of
3072 bits.
* doc/wks.texi: Make example match default generation.
* g10/keygen.c (DEFAULT_STD_KEY_PARAM): update to
rsa3072/cert,sign+rsa3072/encr, and fix neighboring comment,
(gen_rsa, get_keysize_range): update default from 2048 to 3072).
* g10/keyid.c (pubkey_string): update comment so that first example
is the default 3072-bit RSA.

--

3072-bit RSA is widely considered to be 128-bit-equivalent security.
This is a sensible default in 2017.

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

Gbp-Pq: Topic update-defaults
Gbp-Pq: Name 0015-gpg-default-to-3072-bit-RSA-keys.patch
This commit is contained in:
Daniel Kahn Gillmor 2017-09-07 18:41:10 -04:00
parent 7955262151
commit 909fbca196
4 changed files with 9 additions and 10 deletions
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9
g10/keygen.c
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@ -46,11 +46,10 @@
#include "../common/mbox-util.h"
/* The default algorithms. If you change them remember to change them
also in gpg.c:gpgconf_list. You should also check that the value
/* The default algorithms. If you change them, you should ensure the value
is inside the bounds enforced by ask_keysize and gen_xxx. See also
get_keysize_range which encodes the allowed ranges. */
#define DEFAULT_STD_KEY_PARAM "rsa2048/cert,sign+rsa2048/encr"
#define DEFAULT_STD_KEY_PARAM "rsa3072/cert,sign+rsa3072/encr"
#define FUTURE_STD_KEY_PARAM "ed25519/cert,sign+cv25519/encr"
/* When generating keys using the streamlined key generation dialog,
@ -1623,7 +1622,7 @@ gen_rsa (int algo, unsigned int nbits, KBNODE pub_root,
if (nbits < 1024)
{
nbits = 2048;
nbits = 3072;
log_info (_("keysize invalid; using %u bits\n"), nbits );
}
else if (nbits > maxsize)
@ -2092,7 +2091,7 @@ get_keysize_range (int algo, unsigned int *min, unsigned int *max)
default:
*min = opt.compliance == CO_DE_VS ? 2048: 1024;
*max = 4096;
def = 2048;
def = 3072;
break;
}