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34 #include "krb5_locl.h"
36 RCSID("$Id: keytab_memory.c 16352 2005-12-05 18:39:46Z lha $");
38 /* memory operations -------------------------------------------- */
41 krb5_keytab_entry *entries;
45 struct mkt_data *next;
48 /* this mutex protects mkt_head, ->refcount, and ->next
49 * content is not protected (name is static and need no protection)
51 static HEIMDAL_MUTEX mkt_mutex = HEIMDAL_MUTEX_INITIALIZER;
52 static struct mkt_data *mkt_head;
55 static krb5_error_code
56 mkt_resolve(krb5_context context, const char *name, krb5_keytab id)
60 HEIMDAL_MUTEX_lock(&mkt_mutex);
62 for (d = mkt_head; d != NULL; d = d->next)
63 if (strcmp(d->name, name) == 0)
67 krb5_abortx(context, "Double close on memory keytab, "
68 "refcount < 1 %d", d->refcount);
71 HEIMDAL_MUTEX_unlock(&mkt_mutex);
75 d = calloc(1, sizeof(*d));
77 HEIMDAL_MUTEX_unlock(&mkt_mutex);
78 krb5_set_error_string (context, "malloc: out of memory");
81 d->name = strdup(name);
82 if (d->name == NULL) {
83 HEIMDAL_MUTEX_unlock(&mkt_mutex);
85 krb5_set_error_string (context, "malloc: out of memory");
93 HEIMDAL_MUTEX_unlock(&mkt_mutex);
98 static krb5_error_code
99 mkt_close(krb5_context context, krb5_keytab id)
101 struct mkt_data *d = id->data, **dp;
104 HEIMDAL_MUTEX_lock(&mkt_mutex);
107 "krb5 internal error, memory keytab refcount < 1 on close");
109 if (--d->refcount > 0) {
110 HEIMDAL_MUTEX_unlock(&mkt_mutex);
113 for (dp = &mkt_head; *dp != NULL; dp = &(*dp)->next) {
119 HEIMDAL_MUTEX_unlock(&mkt_mutex);
122 for(i = 0; i < d->num_entries; i++)
123 krb5_kt_free_entry(context, &d->entries[i]);
129 static krb5_error_code
130 mkt_get_name(krb5_context context,
135 struct mkt_data *d = id->data;
136 strlcpy(name, d->name, namesize);
140 static krb5_error_code
141 mkt_start_seq_get(krb5_context context,
150 static krb5_error_code
151 mkt_next_entry(krb5_context context,
153 krb5_keytab_entry *entry,
156 struct mkt_data *d = id->data;
157 if(c->fd >= d->num_entries)
159 return krb5_kt_copy_entry_contents(context, &d->entries[c->fd++], entry);
162 static krb5_error_code
163 mkt_end_seq_get(krb5_context context,
165 krb5_kt_cursor *cursor)
170 static krb5_error_code
171 mkt_add_entry(krb5_context context,
173 krb5_keytab_entry *entry)
175 struct mkt_data *d = id->data;
176 krb5_keytab_entry *tmp;
177 tmp = realloc(d->entries, (d->num_entries + 1) * sizeof(*d->entries));
179 krb5_set_error_string (context, "malloc: out of memory");
183 return krb5_kt_copy_entry_contents(context, entry,
184 &d->entries[d->num_entries++]);
187 static krb5_error_code
188 mkt_remove_entry(krb5_context context,
190 krb5_keytab_entry *entry)
192 struct mkt_data *d = id->data;
193 krb5_keytab_entry *e, *end;
196 if (d->num_entries == 0) {
197 krb5_clear_error_string(context);
198 return KRB5_KT_NOTFOUND;
201 /* do this backwards to minimize copying */
202 for(end = d->entries + d->num_entries, e = end - 1; e >= d->entries; e--) {
203 if(krb5_kt_compare(context, e, entry->principal,
204 entry->vno, entry->keyblock.keytype)) {
205 krb5_kt_free_entry(context, e);
206 memmove(e, e + 1, (end - e - 1) * sizeof(*e));
207 memset(end - 1, 0, sizeof(*end));
214 krb5_clear_error_string (context);
215 return KRB5_KT_NOTFOUND;
217 e = realloc(d->entries, d->num_entries * sizeof(*d->entries));
218 if(e != NULL || d->num_entries == 0)
223 const krb5_kt_ops krb5_mkt_ops = {