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(create_duptable, destroy_duptable)

Browse Source 
(insert_duptable): New.
(gpgsm_export): Avoid duplicates.
This commit is contained in:
Werner Koch 2004-03-02 08:02:47 +00:00
parent 4a038d65af
commit 58a722938b
2 changed files with 154 additions and 40 deletions
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6
sm/ChangeLog
View File

@ -1,3 +1,9 @@
2004-03-02 Werner Koch <wk@gnupg.org>
* export.c (create_duptable, destroy_duptable)
(insert_duptable): New.
(gpgsm_export): Avoid duplicates.
2004-02-26 Werner Koch <wk@gnupg.org>
* certchain.c (compare_certs): New.

188
sm/export.c
View File

@ -44,6 +44,25 @@
#endif
/* A table tem to store a fingerprint used in a duplicates table. We
don't need to hash here because a fingerprint is alrady a perfect
hash value. This we use the most significant bits to index the
table and then use a linked list for the overflow. Possible
enhancement for very large number of certictates: Add a second
level table and then resort to a linked list. */
struct duptable_s
{
struct duptable_s *next;
/* Note that we only need to store 19 bytes because the first byte
is implictly given by the table index (we require at least 8
bits). */
unsigned char fpr[19];
};
typedef struct duptable_s *duptable_t;
#define DUPTABLE_BITS 12
#define DUPTABLE_SIZE (1 << DUPTABLE_BITS)
static void print_short_info (ksba_cert_t cert, FILE *fp);
static gpg_error_t export_p12 (const unsigned char *certimg, size_t certimglen,
@ -51,12 +70,74 @@ static gpg_error_t export_p12 (const unsigned char *certimg, size_t certimglen,
FILE **retfp);
/* Create a table used to indetify duplicated certificates. */
static duptable_t *
create_duptable (void)
{
return xtrycalloc (DUPTABLE_SIZE, sizeof (duptable_t));
}
static void
destroy_duptable (duptable_t *table)
{
int idx;
duptable_t t, t2;
if (table)
{
for (idx=0; idx < DUPTABLE_SIZE; idx++)
for (t = table[idx]; t; t = t2)
{
t2 = t->next;
xfree (t);
}
xfree (table);
}
}
/* Insert the 20 byte fingerprint FPR into TABLE. Sets EXITS to true
if the fingerprint already exists in the table. */
static gpg_error_t
insert_duptable (duptable_t *table, unsigned char *fpr, int *exists)
{
size_t idx;
duptable_t t;
*exists = 0;
idx = fpr[0];
#if DUPTABLE_BITS > 16
#error cannot handle a table larger than 16 bits
#elif DUPTABLE_BITS > 8
idx <<= (DUPTABLE_BITS - 8);
idx |= (fpr[1] & ~(~0 << 4));
#endif
for (t = table[idx]; t; t = t->next)
if (!memcmp (t->fpr, fpr+1, 19))
break;
if (t)
{
*exists = 1;
return 0;
}
/* Insert that fingerprint. */
t = xtrymalloc (sizeof *t);
if (!t)
return gpg_error_from_errno (errno);
memcpy (t->fpr, fpr+1, 19);
t->next = table[idx];
table[idx] = t;
return 0;
}
/* Export all certificates or just those given in NAMES. */
void
gpgsm_export (CTRL ctrl, STRLIST names, FILE *fp)
{
KEYDB_HANDLE hd;
KEYDB_HANDLE hd = NULL;
KEYDB_SEARCH_DESC *desc = NULL;
int ndesc;
Base64Context b64writer = NULL;
@ -66,6 +147,15 @@ gpgsm_export (CTRL ctrl, STRLIST names, FILE *fp)
int rc=0;
int count = 0;
int i;
duptable_t *dtable;
dtable = create_duptable ();
if (!dtable)
{
log_error ("creating duplicates table failed: %s\n", strerror (errno));
goto leave;
}
hd = keydb_new (0);
if (!hd)
@ -127,8 +217,8 @@ gpgsm_export (CTRL ctrl, STRLIST names, FILE *fp)
while (!(rc = keydb_search (hd, desc, ndesc)))
{
const unsigned char *image;
size_t imagelen;
unsigned char fpr[20];
int exists;
if (!names)
desc[0].mode = KEYDB_SEARCH_MODE_NEXT;
@ -140,53 +230,69 @@ gpgsm_export (CTRL ctrl, STRLIST names, FILE *fp)
goto leave;
}
image = ksba_cert_get_image (cert, &imagelen);
if (!image)
{
log_error ("ksba_cert_get_image failed\n");
goto leave;
}
if (ctrl->create_pem)
{
if (count)
putc ('\n', fp);
print_short_info (cert, fp);
putc ('\n', fp);
}
count++;
if (!b64writer)
{
ctrl->pem_name = "CERTIFICATE";
rc = gpgsm_create_writer (&b64writer, ctrl, fp, &writer);
if (rc)
{
log_error ("can't create writer: %s\n", gpg_strerror (rc));
goto leave;
}
}
rc = ksba_writer_write (writer, image, imagelen);
gpgsm_get_fingerprint (cert, 0, fpr, NULL);
rc = insert_duptable (dtable, fpr, &exists);
if (rc)
{
log_error ("write error: %s\n", gpg_strerror (rc));
log_error ("inserting into duplicates table fauiled: %s\n",
gpg_strerror (rc));
goto leave;
}
if (ctrl->create_pem)
if (!exists)
{
/* We want one certificate per PEM block */
rc = gpgsm_finish_writer (b64writer);
if (rc)
const unsigned char *image;
size_t imagelen;
image = ksba_cert_get_image (cert, &imagelen);
if (!image)
{
log_error ("write failed: %s\n", gpg_strerror (rc));
log_error ("ksba_cert_get_image failed\n");
goto leave;
}
gpgsm_destroy_writer (b64writer);
b64writer = NULL;
if (ctrl->create_pem)
{
if (count)
putc ('\n', fp);
print_short_info (cert, fp);
putc ('\n', fp);
}
count++;
if (!b64writer)
{
ctrl->pem_name = "CERTIFICATE";
rc = gpgsm_create_writer (&b64writer, ctrl, fp, &writer);
if (rc)
{
log_error ("can't create writer: %s\n", gpg_strerror (rc));
goto leave;
}
}
rc = ksba_writer_write (writer, image, imagelen);
if (rc)
{
log_error ("write error: %s\n", gpg_strerror (rc));
goto leave;
}
if (ctrl->create_pem)
{
/* We want one certificate per PEM block */
rc = gpgsm_finish_writer (b64writer);
if (rc)
{
log_error ("write failed: %s\n", gpg_strerror (rc));
goto leave;
}
gpgsm_destroy_writer (b64writer);
b64writer = NULL;
}
}
ksba_cert_release (cert);
cert = NULL;
}
@ -207,6 +313,7 @@ gpgsm_export (CTRL ctrl, STRLIST names, FILE *fp)
ksba_cert_release (cert);
xfree (desc);
keydb_release (hd);
destroy_duptable (dtable);
}
@ -228,6 +335,7 @@ gpgsm_p12_export (ctrl_t ctrl, const char *name, FILE *fp)
int nread;
FILE *datafp = NULL;
hd = keydb_new (0);
if (!hd)
{