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gpg: Prepare for a longer fingerprint

Browse Source 
* g10/card-util.c (change_cafpr): Use MAX_FINGERPRINT_LEN.
* g10/cipher.c (write_header): Use snprintf.
* g10/gpg.h (MAX_FINGERPRINT_LEN): Change to 32.
(MAX_FORMATTED_FINGERPRINT_LEN): Change to 59
* g10/keyid.c (format_hexfingerprint): Add v5 fingerprint format.
* g10/tofu.c (get_policy): Use MAX_FINGERPRINT_LEN for the buffer but
keep the raw length for now.
--

Note that this patch only increases the size of the buffer and adds a
new formatting for v5 fingerprints.  Moe work is required to fix
internal data structures like those in trustdb.gpg and the tofu
tables.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2017-09-27 09:42:13 +02:00
parent 76c80021d4
commit ecbbafb88d
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
8 changed files with 65 additions and 22 deletions
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10
g10/card-util.c
View File

@ -1121,7 +1121,8 @@ change_cafpr (int fprno)
char *data;
const char *s;
int i, c, rc;
unsigned char fpr[20];
unsigned char fpr[MAX_FINGERPRINT_LEN];
int fprlen;
data = cpr_get ("cardedit.change_cafpr", _("CA fingerprint: "));
if (!data)
@ -1129,7 +1130,7 @@ change_cafpr (int fprno)
trim_spaces (data);
cpr_kill_prompt ();
for (i=0, s=data; i < 20 && *s; )
for (i=0, s=data; i < MAX_FINGERPRINT_LEN && *s; )
{
while (spacep(s))
s++;
@ -1143,8 +1144,9 @@ change_cafpr (int fprno)
fpr[i++] = c;
s += 2;
}
fprlen = i;
xfree (data);
if (i != 20 || *s)
if ((fprlen != 20 && fprlen != 32) || *s)
{
tty_printf (_("Error: invalid formatted fingerprint.\n"));
return -1;
@ -1152,7 +1154,7 @@ change_cafpr (int fprno)
rc = agent_scd_setattr (fprno==1?"CA-FPR-1":
fprno==2?"CA-FPR-2":
fprno==3?"CA-FPR-3":"x", fpr, 20, NULL );
fprno==3?"CA-FPR-3":"x", fpr, fprlen, NULL );
if (rc)
log_error ("error setting cafpr: %s\n", gpg_strerror (rc));
write_sc_op_status (rc);

2
g10/cipher.c
View File

@ -66,7 +66,7 @@ write_header( cipher_filter_context_t *cfx, IOBUF a )
{
char buf[20];
sprintf (buf, "%d %d", ed.mdc_method, cfx->dek->algo);
snprintf (buf, sizeof buf, "%d %d", ed.mdc_method, cfx->dek->algo);
write_status_text (STATUS_BEGIN_ENCRYPTION, buf);
}

13
g10/gpg.h
View File

@ -38,14 +38,15 @@
#define MAX_EXTERN_MPI_BITS 16384
/* The maximum length of a binary fingerprints. This is used to
provide a static buffer and will be increased if we need to support
longer fingerprints.
Warning: At some places we still use 20 instead of this macro. */
#define MAX_FINGERPRINT_LEN 20
* provide a static buffer and will be increased if we need to support
* longer fingerprints. Warning: At some places we have some
* assumption on a 20 byte fingerprint.
* Watch out for FIXME(fingerprint) */
#define MAX_FINGERPRINT_LEN 32
/* The maximum length of a formatted fingerprint as returned by
format_hexfingerprint(). */
#define MAX_FORMATTED_FINGERPRINT_LEN 50
* format_hexfingerprint(). */
#define MAX_FORMATTED_FINGERPRINT_LEN 59
/*

38
g10/keyid.c
View File

@ -835,8 +835,22 @@ format_hexfingerprint (const char *fingerprint, char *buffer, size_t buflen)
/* Half way through we add a second space. */
+ 1);
}
else if (hexlen == 64 || hexlen == 50) /* v5 fingerprint */
{
/* The v5 fingerprint is commonly printed truncated to 25
* octets. We accept the truncated as well as the full hex
* version here and format it like this:
* B2CCB6 838332 5D61BA C50F9F 5E CD21A8 0AC8C5 2565C8 C52565
*/
hexlen = 50;
space = 8 * 6 + 2 + 8 + 1;
}
else /* Other fingerprint versions - print as is. */
{
/* We truncated here so that we do not need to provide a buffer
* of a length which is in reality never used. */
if (hexlen > MAX_FORMATTED_FINGERPRINT_LEN - 1)
hexlen = MAX_FORMATTED_FINGERPRINT_LEN - 1;
space = hexlen + 1;
}
@ -849,7 +863,7 @@ format_hexfingerprint (const char *fingerprint, char *buffer, size_t buflen)
{
for (i = 0, j = 0; i < 40; i ++)
{
if (i && i % 4 == 0)
if (i && !(i % 4))
buffer[j ++] = ' ';
if (i == 40 / 2)
buffer[j ++] = ' ';
@ -859,9 +873,29 @@ format_hexfingerprint (const char *fingerprint, char *buffer, size_t buflen)
buffer[j ++] = 0;
log_assert (j == space);
}
else if (hexlen == 50) /* v5 fingerprint */
{
for (i=j=0; i < 24; i++)
{
if (i && !(i % 6))
buffer[j++] = ' ';
buffer[j++] = fingerprint[i];
}
buffer[j++] = ' ';
buffer[j++] = fingerprint[i++];
buffer[j++] = fingerprint[i++];
for (; i < 50; i++)
{
if (!((i-26) % 6))
buffer[j++] = ' ';
buffer[j++] = fingerprint[i];
}
buffer[j++] = 0;
log_assert (j == space);
}
else
{
strcpy (buffer, fingerprint);
mem2str (buffer, fingerprint, space);
}
return buffer;

3
g10/keylist.c
View File

@ -1906,6 +1906,9 @@ print_card_serialno (const char *serialno)
* pub dsa2048 2007-12-31 [SC] [expires: 2018-12-31]
* 80615870F5BAD690333686D0F2AD85AC1E42B367
*
* pub rsa2048 2017-12-31 [SC] [expires: 2028-12-31]
* 80615870F5BAD690333686D0F2AD85AC1E42B3671122334455
*
* Some global options may result in a different output format. If
* SECRET is set, "sec" or "ssb" is used instead of "pub" or "sub" and
* depending on the value a flag character is shown:

2
g10/sig-check.c
View File

@ -233,7 +233,7 @@ check_signature2 (ctrl_t ctrl,
unsigned char *p, *buffer;
size_t n, nbytes;
int i;
char hashbuf[20];
char hashbuf[20]; /* We use SHA-1 here. */
nbytes = 6;
for (i=0; i < nsig; i++ )

14
g10/tdbdump.c
View File

@ -129,7 +129,7 @@ import_ownertrust (ctrl_t ctrl, const char *fname )
char *p;
size_t n, fprlen;
unsigned int otrust;
byte fpr[20];
byte fpr[MAX_FINGERPRINT_LEN];
int any = 0;
int rc;
@ -171,7 +171,7 @@ import_ownertrust (ctrl_t ctrl, const char *fname )
continue;
}
fprlen = p - line;
if( fprlen != 32 && fprlen != 40 ) {
if( fprlen != 32 && fprlen != 40 && fprlen != 64) {
log_error (_("error in '%s': %s\n"),
fname, _("invalid fingerprint") );
continue;
@ -183,10 +183,12 @@ import_ownertrust (ctrl_t ctrl, const char *fname )
}
if( !otrust )
continue; /* no otrust defined - no need to update or insert */
/* convert the ascii fingerprint to binary */
for(p=line, fprlen=0; fprlen < 20 && *p != ':'; p += 2 )
fpr[fprlen++] = HEXTOBIN(p[0]) * 16 + HEXTOBIN(p[1]);
while (fprlen < 20)
/* Convert the ascii fingerprint to binary */
for(p=line, fprlen=0;
fprlen < MAX_FINGERPRINT_LEN && *p != ':';
p += 2 )
fpr[fprlen++] = HEXTOBIN(p[0]) * 16 + HEXTOBIN(p[1]);
while (fprlen < MAX_FINGERPRINT_LEN)
fpr[fprlen++] = 0;
rc = tdbio_search_trust_byfpr (fpr, &rec);

5
g10/tofu.c
View File

@ -2469,10 +2469,11 @@ get_policy (ctrl_t ctrl, tofu_dbs_t dbs, PKT_public_key *pk,
/* See if the key is signed by an ultimately trusted key. */
{
int fingerprint_raw_len = strlen (fingerprint) / 2;
char fingerprint_raw[20];
char fingerprint_raw[MAX_FINGERPRINT_LEN];
int len = 0;
if (fingerprint_raw_len != sizeof fingerprint_raw
/* FIXME(fingerprint) */
if (fingerprint_raw_len != 20 /*sizeof fingerprint_raw */
|| ((len = hex2bin (fingerprint,
fingerprint_raw, fingerprint_raw_len))
!= strlen (fingerprint)))