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add support for reading (and writing?) old version keytabs

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6034 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
1999-04-24 16:39:57 +00:00
parent a09cdb7965
commit 4cfae1aa22
1 changed files with 167 additions and 60 deletions
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223
lib/krb5/keytab.c
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@@ -44,6 +44,10 @@ RCSID("$Id$");
#define O_BINARY 0
#endif
#define KRB5_KT_VNO_1 1
#define KRB5_KT_VNO_2 2
#define KRB5_KT_VNO KRB5_KT_VNO_2
static struct krb5_keytab_data *kt_types;
static int num_kt_types;
@@ -376,7 +380,8 @@ krb5_kt_ret_principal(krb5_storage *sp,
ret = krb5_ret_int16(sp, &tmp);
if(ret)
return ret;
p->name.name_type = KRB5_NT_SRV_HST;
if (sp->flags & KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS)
tmp--;
p->name.name_string.len = tmp;
ret = krb5_kt_ret_string(sp, &p->realm);
if(ret) return ret;
@@ -388,6 +393,15 @@ krb5_kt_ret_principal(krb5_storage *sp,
ret = krb5_kt_ret_string(sp, p->name.name_string.val + i);
if(ret) return ret;
}
if (krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE))
p->name.name_type = KRB5_NT_UNKNOWN;
else {
int32_t tmp32;
ret = krb5_ret_int32(sp, &tmp32);
p->name.name_type = tmp32;
if (ret)
return ret;
}
*princ = p;
return 0;
}
@@ -460,6 +474,9 @@ krb5_kt_store_principal(krb5_storage *sp,
int i;
int ret;
if(krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS))
ret = krb5_store_int16(sp, p->name.name_string.len + 1);
else
ret = krb5_store_int16(sp, p->name.name_string.len);
if(ret) return ret;
ret = krb5_kt_store_string(sp, p->realm);
@@ -468,6 +485,12 @@ krb5_kt_store_principal(krb5_storage *sp,
ret = krb5_kt_store_string(sp, p->name.name_string.val[i]);
if(ret) return ret;
}
if(!krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE)) {
ret = krb5_store_int32(sp, p->name.name_type);
if(ret)
return ret;
}
return 0;
}
@@ -521,17 +544,36 @@ fkt_get_name(krb5_context context,
{
/* This function is XXX */
struct fkt_data *d = id->data;
strncpy(name, d->filename, namesize);
strcpy_truncate(name, d->filename, namesize);
return 0;
}
static void
storage_set_flags(krb5_context context, krb5_storage *sp, int vno)
{
int flags = 0;
switch(vno) {
case KRB5_KT_VNO_1:
flags |= KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS;
flags |= KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE;
flags |= KRB5_STORAGE_HOST_BYTEORDER;
break;
case KRB5_KT_VNO_2:
break;
default:
krb5_abortx(context,
"storage_set_flags called with bad vno (%x)", vno);
}
krb5_storage_set_flags(sp, flags);
}
static krb5_error_code
fkt_start_seq_get_int(krb5_context context,
krb5_keytab id,
int flags,
krb5_kt_cursor *c)
{
int16_t tag;
int8_t pvno, tag;
krb5_error_code ret;
struct fkt_data *d = id->data;
@@ -539,17 +581,25 @@ fkt_start_seq_get_int(krb5_context context,
if (c->fd < 0)
return errno;
c->sp = krb5_storage_from_fd(c->fd);
ret = krb5_ret_int16(c->sp, &tag);
if (ret) {
ret = krb5_ret_int8(c->sp, &pvno);
if(ret) {
krb5_storage_free(c->sp);
close(c->fd);
return ret;
}
if (tag != 0x0502) {
if(pvno != 5) {
krb5_storage_free(c->sp);
close(c->fd);
return KRB5_KT_UNKNOWN_TYPE;
return KRB5_KEYTAB_BADVNO;
}
c->offset = c->sp->seek(c->sp, 0, SEEK_CUR);
ret = krb5_ret_int8(c->sp, &tag);
if (ret) {
krb5_storage_free(c->sp);
close(c->fd);
return ret;
}
id->version = tag;
storage_set_flags(context, c->sp, id->version);
return 0;
}
@@ -569,48 +619,41 @@ fkt_next_entry_int(krb5_context context,
off_t *start,
off_t *end)
{
u_int32_t len;
int32_t len;
u_int32_t timestamp;
int ret;
int8_t tmp8;
int32_t tmp32;
off_t pos;
pos = cursor->sp->seek(cursor->sp, 0, SEEK_CUR);
loop:
cursor->sp->seek(cursor->sp, cursor->offset, SEEK_SET);
ret = krb5_ret_int32(cursor->sp, &tmp32);
ret = krb5_ret_int32(cursor->sp, &len);
if (ret)
return ret;
if(tmp32 < 0) {
cursor->offset += 4 + -tmp32;
if(len < 0) {
pos = cursor->sp->seek(cursor->sp, -len, SEEK_CUR);
goto loop;
}
if(start) *start = cursor->offset;
len = tmp32;
cursor->offset += 4 + len;
ret = krb5_kt_ret_principal (cursor->sp, &entry->principal);
if (ret)
return ret;
ret = krb5_ret_int32(cursor->sp, &tmp32);
entry->principal->name.name_type = tmp32;
if (ret)
return ret;
goto out;
ret = krb5_ret_int32(cursor->sp, &tmp32);
timestamp = tmp32;
if (ret)
return ret;
goto out;
ret = krb5_ret_int8(cursor->sp, &tmp8);
if (ret)
return ret;
goto out;
entry->vno = tmp8;
ret = krb5_kt_ret_keyblock (cursor->sp, &entry->keyblock);
if (ret)
goto out;
if(start) *start = pos;
if(end) *end = *start + 4 + len;
out:
cursor->sp->seek(cursor->sp, pos + 4 + len, SEEK_SET);
return ret;
/* backwards compatibility with Heimdal <= 0.0n */
if(len == 4711)
cursor->offset = cursor->sp->seek(cursor->sp, 0, SEEK_CUR);
if(end) *end = cursor->offset;
return 0;
}
static krb5_error_code
@@ -641,43 +684,110 @@ fkt_add_entry(krb5_context context,
int fd;
krb5_storage *sp;
struct fkt_data *d = id->data;
off_t pos_start, pos_end;
krb5_data keytab;
int32_t len;
fd = open (d->filename, O_WRONLY | O_BINARY);
fd = open (d->filename, O_RDWR | O_BINARY);
if (fd < 0) {
fd = open (d->filename, O_WRONLY | O_CREAT | O_BINARY, 0600);
fd = open (d->filename, O_RDWR | O_CREAT | O_BINARY, 0600);
if (fd < 0)
return errno;
sp = krb5_storage_from_fd(fd);
ret = krb5_store_int16 (sp, 0x0502);
if (ret) {
ret = krb5_store_int8(sp, 5);
if(ret) {
krb5_storage_free(sp);
close(fd);
return ret;
}
if(id->version == 0)
id->version = KRB5_KT_VNO;
ret = krb5_store_int8 (sp, id->version);
if (ret) {
krb5_storage_free(sp);
close(fd);
return ret;
}
storage_set_flags(context, sp, id->version);
} else {
int8_t pvno, tag;
sp = krb5_storage_from_fd(fd);
ret = krb5_ret_int8(sp, &pvno);
if(ret) {
krb5_storage_free(sp);
close(fd);
return ret;
}
if(pvno != 5) {
krb5_storage_free(sp);
close(fd);
return KRB5_KEYTAB_BADVNO;
}
ret = krb5_ret_int8 (sp, &tag);
if (ret) {
krb5_storage_free(sp);
close(fd);
return ret;
}
id->version = tag;
storage_set_flags(context, sp, id->version);
}
pos_start = sp->seek(sp, 0, SEEK_END);
ret = krb5_store_int32 (sp, 0); /* store real size at end */
if (ret) goto out;
ret = krb5_kt_store_principal (sp, entry->principal);
if (ret) goto out;
ret = krb5_store_int32 (sp, entry->principal->name.name_type);
if (ret) goto out;
ret = krb5_store_int32 (sp, time(NULL));
if (ret) goto out;
ret = krb5_store_int8 (sp, entry->vno);
if (ret) goto out;
ret = krb5_kt_store_keyblock (sp, &entry->keyblock);
if (ret) goto out;
pos_end = sp->seek(sp, 0, SEEK_CUR);
sp->seek(sp, pos_start, SEEK_SET);
ret = krb5_store_int32 (sp, pos_end - pos_start - 4);
if (ret) goto out;
krb5_storage_free (sp);
out:
close (fd);
{
krb5_storage *emem;
emem = krb5_storage_emem();
if(emem == NULL) {
ret = ENOMEM;
goto out;
}
ret = krb5_kt_store_principal(emem, entry->principal);
if(ret) {
krb5_storage_free(emem);
goto out;
}
ret = krb5_store_int32 (emem, time(NULL));
if(ret) {
krb5_storage_free(emem);
goto out;
}
ret = krb5_store_int8 (emem, entry->vno);
if(ret) {
krb5_storage_free(emem);
goto out;
}
ret = krb5_kt_store_keyblock (emem, &entry->keyblock);
if(ret) {
krb5_storage_free(emem);
goto out;
}
ret = krb5_storage_to_data(emem, &keytab);
krb5_storage_free(emem);
if(ret)
goto out;
}
while(1) {
ret = krb5_ret_int32(sp, &len);
if(ret == KRB5_CC_END) {
len = keytab.length;
break;
}
if(len < 0) {
len = -len;
if(len >= keytab.length) {
sp->seek(sp, -4, SEEK_CUR);
break;
}
}
sp->seek(sp, len, SEEK_CUR);
}
ret = krb5_store_int32(sp, len);
if(sp->store(sp, keytab.data, keytab.length) < 0)
ret = errno;
memset(keytab.data, 0, keytab.length);
krb5_data_free(&keytab);
out:
krb5_storage_free(sp);
close(fd);
return ret;
}
@@ -700,10 +810,7 @@ fkt_remove_entry(krb5_context context,
unsigned char buf[128];
found = 1;
cursor.sp->seek(cursor.sp, pos_start, SEEK_SET);
krb5_ret_int32(cursor.sp, &len);
cursor.sp->seek(cursor.sp, pos_start, SEEK_SET);
if(len == 4711)
len = pos_end - pos_start;
len = pos_end - pos_start - 4;
krb5_store_int32(cursor.sp, -len);
memset(buf, 0, sizeof(buf));
while(len > 0) {