openssl1.0/crypto/objects/o_names.c
2019-08-09 10:00:55 +02:00

368 lines
9.7 KiB
C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/err.h>
#include <openssl/lhash.h>
#include <openssl/objects.h>
#include <openssl/safestack.h>
#include <openssl/e_os2.h>
/*
* Later versions of DEC C has started to add lnkage information to certain
* functions, which makes it tricky to use them as values to regular function
* pointers. One way is to define a macro that takes care of casting them
* correctly.
*/
#ifdef OPENSSL_SYS_VMS_DECC
# define OPENSSL_strcmp (int (*)(const char *,const char *))strcmp
#else
# define OPENSSL_strcmp strcmp
#endif
/*
* I use the ex_data stuff to manage the identifiers for the obj_name_types
* that applications may define. I only really use the free function field.
*/
DECLARE_LHASH_OF(OBJ_NAME);
static LHASH_OF(OBJ_NAME) *names_lh = NULL;
static int names_type_num = OBJ_NAME_TYPE_NUM;
typedef struct name_funcs_st {
unsigned long (*hash_func) (const char *name);
int (*cmp_func) (const char *a, const char *b);
void (*free_func) (const char *, int, const char *);
} NAME_FUNCS;
DECLARE_STACK_OF(NAME_FUNCS)
IMPLEMENT_STACK_OF(NAME_FUNCS)
static STACK_OF(NAME_FUNCS) *name_funcs_stack;
/*
* The LHASH callbacks now use the raw "void *" prototypes and do
* per-variable casting in the functions. This prevents function pointer
* casting without the need for macro-generated wrapper functions.
*/
/* static unsigned long obj_name_hash(OBJ_NAME *a); */
static unsigned long obj_name_hash(const void *a_void);
/* static int obj_name_cmp(OBJ_NAME *a,OBJ_NAME *b); */
static int obj_name_cmp(const void *a_void, const void *b_void);
static IMPLEMENT_LHASH_HASH_FN(obj_name, OBJ_NAME)
static IMPLEMENT_LHASH_COMP_FN(obj_name, OBJ_NAME)
int OBJ_NAME_init(void)
{
if (names_lh != NULL)
return (1);
MemCheck_off();
names_lh = lh_OBJ_NAME_new();
MemCheck_on();
return (names_lh != NULL);
}
int OBJ_NAME_new_index(unsigned long (*hash_func) (const char *),
int (*cmp_func) (const char *, const char *),
void (*free_func) (const char *, int, const char *))
{
int ret;
int i;
NAME_FUNCS *name_funcs;
if (name_funcs_stack == NULL) {
MemCheck_off();
name_funcs_stack = sk_NAME_FUNCS_new_null();
MemCheck_on();
}
if (name_funcs_stack == NULL) {
/* ERROR */
return (0);
}
ret = names_type_num;
names_type_num++;
for (i = sk_NAME_FUNCS_num(name_funcs_stack); i < names_type_num; i++) {
MemCheck_off();
name_funcs = OPENSSL_malloc(sizeof(NAME_FUNCS));
MemCheck_on();
if (!name_funcs) {
OBJerr(OBJ_F_OBJ_NAME_NEW_INDEX, ERR_R_MALLOC_FAILURE);
return (0);
}
name_funcs->hash_func = lh_strhash;
name_funcs->cmp_func = OPENSSL_strcmp;
name_funcs->free_func = 0; /* NULL is often declared to * ((void
* *)0), which according * to Compaq C is
* not really * compatible with a function
* * pointer. -- Richard Levitte */
MemCheck_off();
sk_NAME_FUNCS_push(name_funcs_stack, name_funcs);
MemCheck_on();
}
name_funcs = sk_NAME_FUNCS_value(name_funcs_stack, ret);
if (hash_func != NULL)
name_funcs->hash_func = hash_func;
if (cmp_func != NULL)
name_funcs->cmp_func = cmp_func;
if (free_func != NULL)
name_funcs->free_func = free_func;
return (ret);
}
/* static int obj_name_cmp(OBJ_NAME *a, OBJ_NAME *b) */
static int obj_name_cmp(const void *a_void, const void *b_void)
{
int ret;
const OBJ_NAME *a = (const OBJ_NAME *)a_void;
const OBJ_NAME *b = (const OBJ_NAME *)b_void;
ret = a->type - b->type;
if (ret == 0) {
if ((name_funcs_stack != NULL)
&& (sk_NAME_FUNCS_num(name_funcs_stack) > a->type)) {
ret = sk_NAME_FUNCS_value(name_funcs_stack,
a->type)->cmp_func(a->name, b->name);
} else
ret = strcmp(a->name, b->name);
}
return (ret);
}
/* static unsigned long obj_name_hash(OBJ_NAME *a) */
static unsigned long obj_name_hash(const void *a_void)
{
unsigned long ret;
const OBJ_NAME *a = (const OBJ_NAME *)a_void;
if ((name_funcs_stack != NULL)
&& (sk_NAME_FUNCS_num(name_funcs_stack) > a->type)) {
ret =
sk_NAME_FUNCS_value(name_funcs_stack,
a->type)->hash_func(a->name);
} else {
ret = lh_strhash(a->name);
}
ret ^= a->type;
return (ret);
}
const char *OBJ_NAME_get(const char *name, int type)
{
OBJ_NAME on, *ret;
int num = 0, alias;
if (name == NULL)
return (NULL);
if ((names_lh == NULL) && !OBJ_NAME_init())
return (NULL);
alias = type & OBJ_NAME_ALIAS;
type &= ~OBJ_NAME_ALIAS;
on.name = name;
on.type = type;
for (;;) {
ret = lh_OBJ_NAME_retrieve(names_lh, &on);
if (ret == NULL)
return (NULL);
if ((ret->alias) && !alias) {
if (++num > 10)
return (NULL);
on.name = ret->data;
} else {
return (ret->data);
}
}
}
int OBJ_NAME_add(const char *name, int type, const char *data)
{
OBJ_NAME *onp, *ret;
int alias;
if ((names_lh == NULL) && !OBJ_NAME_init())
return (0);
alias = type & OBJ_NAME_ALIAS;
type &= ~OBJ_NAME_ALIAS;
onp = (OBJ_NAME *)OPENSSL_malloc(sizeof(OBJ_NAME));
if (onp == NULL) {
/* ERROR */
return 0;
}
onp->name = name;
onp->alias = alias;
onp->type = type;
onp->data = data;
ret = lh_OBJ_NAME_insert(names_lh, onp);
if (ret != NULL) {
/* free things */
if ((name_funcs_stack != NULL)
&& (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type)) {
/*
* XXX: I'm not sure I understand why the free function should
* get three arguments... -- Richard Levitte
*/
sk_NAME_FUNCS_value(name_funcs_stack,
ret->type)->free_func(ret->name, ret->type,
ret->data);
}
OPENSSL_free(ret);
} else {
if (lh_OBJ_NAME_error(names_lh)) {
/* ERROR */
OPENSSL_free(onp);
return 0;
}
}
return 1;
}
int OBJ_NAME_remove(const char *name, int type)
{
OBJ_NAME on, *ret;
if (names_lh == NULL)
return (0);
type &= ~OBJ_NAME_ALIAS;
on.name = name;
on.type = type;
ret = lh_OBJ_NAME_delete(names_lh, &on);
if (ret != NULL) {
/* free things */
if ((name_funcs_stack != NULL)
&& (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type)) {
/*
* XXX: I'm not sure I understand why the free function should
* get three arguments... -- Richard Levitte
*/
sk_NAME_FUNCS_value(name_funcs_stack,
ret->type)->free_func(ret->name, ret->type,
ret->data);
}
OPENSSL_free(ret);
return (1);
} else
return (0);
}
struct doall {
int type;
void (*fn) (const OBJ_NAME *, void *arg);
void *arg;
};
static void do_all_fn_doall_arg(const OBJ_NAME *name, struct doall *d)
{
if (name->type == d->type)
d->fn(name, d->arg);
}
static IMPLEMENT_LHASH_DOALL_ARG_FN(do_all_fn, const OBJ_NAME, struct doall)
void OBJ_NAME_do_all(int type, void (*fn) (const OBJ_NAME *, void *arg),
void *arg)
{
struct doall d;
d.type = type;
d.fn = fn;
d.arg = arg;
lh_OBJ_NAME_doall_arg(names_lh, LHASH_DOALL_ARG_FN(do_all_fn),
struct doall, &d);
}
struct doall_sorted {
int type;
int n;
const OBJ_NAME **names;
};
static void do_all_sorted_fn(const OBJ_NAME *name, void *d_)
{
struct doall_sorted *d = d_;
if (name->type != d->type)
return;
d->names[d->n++] = name;
}
static int do_all_sorted_cmp(const void *n1_, const void *n2_)
{
const OBJ_NAME *const *n1 = n1_;
const OBJ_NAME *const *n2 = n2_;
return strcmp((*n1)->name, (*n2)->name);
}
void OBJ_NAME_do_all_sorted(int type,
void (*fn) (const OBJ_NAME *, void *arg),
void *arg)
{
struct doall_sorted d;
int n;
d.type = type;
d.names =
OPENSSL_malloc(lh_OBJ_NAME_num_items(names_lh) * sizeof(*d.names));
/* Really should return an error if !d.names...but its a void function! */
if (d.names) {
d.n = 0;
OBJ_NAME_do_all(type, do_all_sorted_fn, &d);
qsort((void *)d.names, d.n, sizeof(*d.names), do_all_sorted_cmp);
for (n = 0; n < d.n; ++n)
fn(d.names[n], arg);
OPENSSL_free((void *)d.names);
}
}
static int free_type;
static void names_lh_free_doall(OBJ_NAME *onp)
{
if (onp == NULL)
return;
if (free_type < 0 || free_type == onp->type)
OBJ_NAME_remove(onp->name, onp->type);
}
static IMPLEMENT_LHASH_DOALL_FN(names_lh_free, OBJ_NAME)
static void name_funcs_free(NAME_FUNCS *ptr)
{
OPENSSL_free(ptr);
}
void OBJ_NAME_cleanup(int type)
{
unsigned long down_load;
if (names_lh == NULL)
return;
free_type = type;
down_load = lh_OBJ_NAME_down_load(names_lh);
lh_OBJ_NAME_down_load(names_lh) = 0;
lh_OBJ_NAME_doall(names_lh, LHASH_DOALL_FN(names_lh_free));
if (type < 0) {
lh_OBJ_NAME_free(names_lh);
sk_NAME_FUNCS_pop_free(name_funcs_stack, name_funcs_free);
names_lh = NULL;
name_funcs_stack = NULL;
} else
lh_OBJ_NAME_down_load(names_lh) = down_load;
}