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path: root/src/lib/libcrypto/objects/o_names.c
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Diffstat (limited to 'src/lib/libcrypto/objects/o_names.c')
-rw-r--r--src/lib/libcrypto/objects/o_names.c369
1 files changed, 369 insertions, 0 deletions
diff --git a/src/lib/libcrypto/objects/o_names.c b/src/lib/libcrypto/objects/o_names.c
new file mode 100644
index 0000000000..28c9370ca3
--- /dev/null
+++ b/src/lib/libcrypto/objects/o_names.c
@@ -0,0 +1,369 @@
1#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4
5#include <openssl/err.h>
6#include <openssl/lhash.h>
7#include <openssl/objects.h>
8#include <openssl/safestack.h>
9#include <openssl/e_os2.h>
10
11/* Later versions of DEC C has started to add lnkage information to certain
12 * functions, which makes it tricky to use them as values to regular function
13 * pointers. One way is to define a macro that takes care of casting them
14 * correctly.
15 */
16#ifdef OPENSSL_SYS_VMS_DECC
17# define OPENSSL_strcmp (int (*)(const char *,const char *))strcmp
18#else
19# define OPENSSL_strcmp strcmp
20#endif
21
22/* I use the ex_data stuff to manage the identifiers for the obj_name_types
23 * that applications may define. I only really use the free function field.
24 */
25static LHASH *names_lh=NULL;
26static int names_type_num=OBJ_NAME_TYPE_NUM;
27
28typedef struct name_funcs_st
29 {
30 unsigned long (*hash_func)(const char *name);
31 int (*cmp_func)(const char *a,const char *b);
32 void (*free_func)(const char *, int, const char *);
33 } NAME_FUNCS;
34
35DECLARE_STACK_OF(NAME_FUNCS)
36IMPLEMENT_STACK_OF(NAME_FUNCS)
37
38static STACK_OF(NAME_FUNCS) *name_funcs_stack;
39
40/* The LHASH callbacks now use the raw "void *" prototypes and do per-variable
41 * casting in the functions. This prevents function pointer casting without the
42 * need for macro-generated wrapper functions. */
43
44/* static unsigned long obj_name_hash(OBJ_NAME *a); */
45static unsigned long obj_name_hash(const void *a_void);
46/* static int obj_name_cmp(OBJ_NAME *a,OBJ_NAME *b); */
47static int obj_name_cmp(const void *a_void,const void *b_void);
48
49int OBJ_NAME_init(void)
50 {
51 if (names_lh != NULL) return(1);
52 MemCheck_off();
53 names_lh=lh_new(obj_name_hash, obj_name_cmp);
54 MemCheck_on();
55 return(names_lh != NULL);
56 }
57
58int OBJ_NAME_new_index(unsigned long (*hash_func)(const char *),
59 int (*cmp_func)(const char *, const char *),
60 void (*free_func)(const char *, int, const char *))
61 {
62 int ret;
63 int i;
64 NAME_FUNCS *name_funcs;
65
66 if (name_funcs_stack == NULL)
67 {
68 MemCheck_off();
69 name_funcs_stack=sk_NAME_FUNCS_new_null();
70 MemCheck_on();
71 }
72 if ((name_funcs_stack == NULL))
73 {
74 /* ERROR */
75 return(0);
76 }
77 ret=names_type_num;
78 names_type_num++;
79 for (i=sk_NAME_FUNCS_num(name_funcs_stack); i<names_type_num; i++)
80 {
81 MemCheck_off();
82 name_funcs = OPENSSL_malloc(sizeof(NAME_FUNCS));
83 MemCheck_on();
84 if (!name_funcs)
85 {
86 OBJerr(OBJ_F_OBJ_NAME_NEW_INDEX,ERR_R_MALLOC_FAILURE);
87 return(0);
88 }
89 name_funcs->hash_func = lh_strhash;
90 name_funcs->cmp_func = OPENSSL_strcmp;
91 name_funcs->free_func = 0; /* NULL is often declared to
92 * ((void *)0), which according
93 * to Compaq C is not really
94 * compatible with a function
95 * pointer. -- Richard Levitte*/
96 MemCheck_off();
97 sk_NAME_FUNCS_push(name_funcs_stack,name_funcs);
98 MemCheck_on();
99 }
100 name_funcs = sk_NAME_FUNCS_value(name_funcs_stack, ret);
101 if (hash_func != NULL)
102 name_funcs->hash_func = hash_func;
103 if (cmp_func != NULL)
104 name_funcs->cmp_func = cmp_func;
105 if (free_func != NULL)
106 name_funcs->free_func = free_func;
107 return(ret);
108 }
109
110/* static int obj_name_cmp(OBJ_NAME *a, OBJ_NAME *b) */
111static int obj_name_cmp(const void *a_void, const void *b_void)
112 {
113 int ret;
114 OBJ_NAME *a = (OBJ_NAME *)a_void;
115 OBJ_NAME *b = (OBJ_NAME *)b_void;
116
117 ret=a->type-b->type;
118 if (ret == 0)
119 {
120 if ((name_funcs_stack != NULL)
121 && (sk_NAME_FUNCS_num(name_funcs_stack) > a->type))
122 {
123 ret=sk_NAME_FUNCS_value(name_funcs_stack,
124 a->type)->cmp_func(a->name,b->name);
125 }
126 else
127 ret=strcmp(a->name,b->name);
128 }
129 return(ret);
130 }
131
132/* static unsigned long obj_name_hash(OBJ_NAME *a) */
133static unsigned long obj_name_hash(const void *a_void)
134 {
135 unsigned long ret;
136 OBJ_NAME *a = (OBJ_NAME *)a_void;
137
138 if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > a->type))
139 {
140 ret=sk_NAME_FUNCS_value(name_funcs_stack,
141 a->type)->hash_func(a->name);
142 }
143 else
144 {
145 ret=lh_strhash(a->name);
146 }
147 ret^=a->type;
148 return(ret);
149 }
150
151const char *OBJ_NAME_get(const char *name, int type)
152 {
153 OBJ_NAME on,*ret;
154 int num=0,alias;
155
156 if (name == NULL) return(NULL);
157 if ((names_lh == NULL) && !OBJ_NAME_init()) return(NULL);
158
159 alias=type&OBJ_NAME_ALIAS;
160 type&= ~OBJ_NAME_ALIAS;
161
162 on.name=name;
163 on.type=type;
164
165 for (;;)
166 {
167 ret=(OBJ_NAME *)lh_retrieve(names_lh,&on);
168 if (ret == NULL) return(NULL);
169 if ((ret->alias) && !alias)
170 {
171 if (++num > 10) return(NULL);
172 on.name=ret->data;
173 }
174 else
175 {
176 return(ret->data);
177 }
178 }
179 }
180
181int OBJ_NAME_add(const char *name, int type, const char *data)
182 {
183 OBJ_NAME *onp,*ret;
184 int alias;
185
186 if ((names_lh == NULL) && !OBJ_NAME_init()) return(0);
187
188 alias=type&OBJ_NAME_ALIAS;
189 type&= ~OBJ_NAME_ALIAS;
190
191 onp=(OBJ_NAME *)OPENSSL_malloc(sizeof(OBJ_NAME));
192 if (onp == NULL)
193 {
194 /* ERROR */
195 return(0);
196 }
197
198 onp->name=name;
199 onp->alias=alias;
200 onp->type=type;
201 onp->data=data;
202
203 ret=(OBJ_NAME *)lh_insert(names_lh,onp);
204 if (ret != NULL)
205 {
206 /* free things */
207 if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type))
208 {
209 /* XXX: I'm not sure I understand why the free
210 * function should get three arguments...
211 * -- Richard Levitte
212 */
213 sk_NAME_FUNCS_value(name_funcs_stack,
214 ret->type)->free_func(ret->name,ret->type,ret->data);
215 }
216 OPENSSL_free(ret);
217 }
218 else
219 {
220 if (lh_error(names_lh))
221 {
222 /* ERROR */
223 return(0);
224 }
225 }
226 return(1);
227 }
228
229int OBJ_NAME_remove(const char *name, int type)
230 {
231 OBJ_NAME on,*ret;
232
233 if (names_lh == NULL) return(0);
234
235 type&= ~OBJ_NAME_ALIAS;
236 on.name=name;
237 on.type=type;
238 ret=(OBJ_NAME *)lh_delete(names_lh,&on);
239 if (ret != NULL)
240 {
241 /* free things */
242 if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type))
243 {
244 /* XXX: I'm not sure I understand why the free
245 * function should get three arguments...
246 * -- Richard Levitte
247 */
248 sk_NAME_FUNCS_value(name_funcs_stack,
249 ret->type)->free_func(ret->name,ret->type,ret->data);
250 }
251 OPENSSL_free(ret);
252 return(1);
253 }
254 else
255 return(0);
256 }
257
258struct doall
259 {
260 int type;
261 void (*fn)(const OBJ_NAME *,void *arg);
262 void *arg;
263 };
264
265static void do_all_fn(const OBJ_NAME *name,struct doall *d)
266 {
267 if(name->type == d->type)
268 d->fn(name,d->arg);
269 }
270
271static IMPLEMENT_LHASH_DOALL_ARG_FN(do_all_fn, const OBJ_NAME *, struct doall *)
272
273void OBJ_NAME_do_all(int type,void (*fn)(const OBJ_NAME *,void *arg),void *arg)
274 {
275 struct doall d;
276
277 d.type=type;
278 d.fn=fn;
279 d.arg=arg;
280
281 lh_doall_arg(names_lh,LHASH_DOALL_ARG_FN(do_all_fn),&d);
282 }
283
284struct doall_sorted
285 {
286 int type;
287 int n;
288 const OBJ_NAME **names;
289 };
290
291static void do_all_sorted_fn(const OBJ_NAME *name,void *d_)
292 {
293 struct doall_sorted *d=d_;
294
295 if(name->type != d->type)
296 return;
297
298 d->names[d->n++]=name;
299 }
300
301static int do_all_sorted_cmp(const void *n1_,const void *n2_)
302 {
303 const OBJ_NAME * const *n1=n1_;
304 const OBJ_NAME * const *n2=n2_;
305
306 return strcmp((*n1)->name,(*n2)->name);
307 }
308
309void OBJ_NAME_do_all_sorted(int type,void (*fn)(const OBJ_NAME *,void *arg),
310 void *arg)
311 {
312 struct doall_sorted d;
313 int n;
314
315 d.type=type;
316 d.names=OPENSSL_malloc(lh_num_items(names_lh)*sizeof *d.names);
317 d.n=0;
318 OBJ_NAME_do_all(type,do_all_sorted_fn,&d);
319
320 qsort((void *)d.names,d.n,sizeof *d.names,do_all_sorted_cmp);
321
322 for(n=0 ; n < d.n ; ++n)
323 fn(d.names[n],arg);
324
325 OPENSSL_free((void *)d.names);
326 }
327
328static int free_type;
329
330static void names_lh_free(OBJ_NAME *onp)
331{
332 if(onp == NULL)
333 return;
334
335 if ((free_type < 0) || (free_type == onp->type))
336 {
337 OBJ_NAME_remove(onp->name,onp->type);
338 }
339 }
340
341static IMPLEMENT_LHASH_DOALL_FN(names_lh_free, OBJ_NAME *)
342
343static void name_funcs_free(NAME_FUNCS *ptr)
344 {
345 OPENSSL_free(ptr);
346 }
347
348void OBJ_NAME_cleanup(int type)
349 {
350 unsigned long down_load;
351
352 if (names_lh == NULL) return;
353
354 free_type=type;
355 down_load=names_lh->down_load;
356 names_lh->down_load=0;
357
358 lh_doall(names_lh,LHASH_DOALL_FN(names_lh_free));
359 if (type < 0)
360 {
361 lh_free(names_lh);
362 sk_NAME_FUNCS_pop_free(name_funcs_stack,name_funcs_free);
363 names_lh=NULL;
364 name_funcs_stack = NULL;
365 }
366 else
367 names_lh->down_load=down_load;
368 }
369
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