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Implement version 4 of the ccache format.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2923 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
1997-08-11 23:30:18 +00:00
parent 51ad0d7888
commit b1ea862adb
1 changed files with 87 additions and 17 deletions
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104
lib/krb5/fcache.c
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@@ -42,10 +42,18 @@ RCSID("$Id$");
typedef struct krb5_fcache{
char *filename;
int version;
}krb5_fcache;
#define KRB5_FCC_FVNO_3 0x503
#define KRB5_FCC_FVNO_4 0x504
#define FCC_TAG_DELTATIME 1
#define FILENAME(X) (((krb5_fcache*)(X)->data.data)->filename)
#define FCACHE(X) ((krb5_fcache*)(X)->data.data)
static char*
fcc_get_name(krb5_context context,
krb5_ccache id)
@@ -65,6 +73,7 @@ fcc_resolve(krb5_context context, krb5_ccache *id, const char *res)
free(f);
return KRB5_CC_NOMEM;
}
f->version = 0;
(*id)->data.data = f;
(*id)->data.length = sizeof(*f);
return 0;
@@ -105,23 +114,32 @@ fcc_initialize(krb5_context context,
krb5_ccache id,
krb5_principal primary_principal)
{
krb5_fcache *f = FCACHE(id);
int ret;
int fd;
char *filename = f->filename;
char *f;
f = FILENAME(id);
if((ret = erase_file(f)))
if((ret = erase_file(filename)))
return ret;
fd = open(f, O_RDWR | O_CREAT | O_EXCL, 0600);
fd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
if(fd == -1)
return errno;
{
krb5_storage *sp;
sp = krb5_storage_from_fd(fd);
krb5_store_int16(sp, 0x503);
f->version = KRB5_FCC_FVNO_4;
krb5_store_int16(sp, f->version);
/* V4 stuff */
if (context->kdc_sec_offset) {
krb5_store_int16 (sp, 12); /* length */
krb5_store_int16 (sp, FCC_TAG_DELTATIME); /* Tag */
krb5_store_int16 (sp, 8); /* length of data */
krb5_store_int32 (sp, context->kdc_sec_offset);
krb5_store_int32 (sp, context->kdc_usec_offset);
} else {
krb5_store_int16 (sp, 0);
}
krb5_store_principal(sp, primary_principal);
krb5_storage_free(sp);
}
@@ -222,19 +240,72 @@ cleanup:
}
static krb5_error_code
fcc_get_principal(krb5_context context,
krb5_ccache id,
krb5_principal *principal)
init_fcc (krb5_context context,
krb5_fcache *fcache,
krb5_storage **ret_sp,
int *ret_fd)
{
int fd;
int16_t tag;
krb5_storage *sp;
fd = open(FILENAME(id), O_RDONLY);
fd = open(fcache->filename, O_RDONLY);
if(fd < 0)
return errno;
sp = krb5_storage_from_fd(fd);
krb5_ret_int16(sp, &tag);
fcache->version = tag;
switch (tag) {
case KRB5_FCC_FVNO_4 : {
int16_t length;
krb5_ret_int16 (sp, &length);
while(length > 0) {
int16_t tag, data_len;
int i;
int8_t dummy;
krb5_ret_int16 (sp, &tag);
krb5_ret_int16 (sp, &data_len);
switch (tag) {
case FCC_TAG_DELTATIME :
krb5_ret_int32 (sp, &context->kdc_sec_offset);
krb5_ret_int32 (sp, &context->kdc_usec_offset);
break;
default :
for (i = 0; i < data_len; ++i)
krb5_ret_int8 (sp, &dummy);
break;
}
length -= 4 + data_len;
}
break;
}
case KRB5_FCC_FVNO_3 :
break;
default :
krb5_storage_free (sp);
close (fd);
return KRB5_CCACHE_BADVNO;
}
*ret_sp = sp;
*ret_fd = fd;
return 0;
}
static krb5_error_code
fcc_get_principal(krb5_context context,
krb5_ccache id,
krb5_principal *principal)
{
krb5_error_code ret;
krb5_fcache *f = FCACHE(id);
int fd;
krb5_storage *sp;
ret = init_fcc (context, f, &sp, &fd);
if (ret)
return ret;
krb5_ret_principal(sp, principal);
krb5_storage_free(sp);
close(fd);
@@ -246,15 +317,14 @@ fcc_get_first (krb5_context context,
krb5_ccache id,
krb5_cc_cursor *cursor)
{
int16_t tag;
krb5_error_code ret;
krb5_principal principal;
krb5_storage *sp;
krb5_fcache *f = FCACHE(id);
cursor->u.fd = open (krb5_cc_get_name (context, id), O_RDONLY);
if (cursor->u.fd < 0)
return errno;
sp = krb5_storage_from_fd(cursor->u.fd);
krb5_ret_int16 (sp, &tag);
ret = init_fcc (context, f, &sp, &cursor->u.fd);
if (ret)
return ret;
krb5_ret_principal (sp, &principal);
krb5_storage_free(sp);
krb5_free_principal (context, principal);