o_names.c
上传用户:yisoukefu
上传日期:2020-08-09
资源大小:39506k
文件大小:8k
- #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.
- */
- static LHASH *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);
- int OBJ_NAME_init(void)
- {
- if (names_lh != NULL) return(1);
- MemCheck_off();
- names_lh=lh_new(obj_name_hash, obj_name_cmp);
- 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=(OBJ_NAME *)lh_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=(OBJ_NAME *)lh_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_error(names_lh))
- {
- /* ERROR */
- 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=(OBJ_NAME *)lh_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(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_doall_arg(names_lh,LHASH_DOALL_ARG_FN(do_all_fn),&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_num_items(names_lh)*sizeof *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(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=names_lh->down_load;
- names_lh->down_load=0;
- lh_doall(names_lh,LHASH_DOALL_FN(names_lh_free));
- if (type < 0)
- {
- lh_free(names_lh);
- sk_NAME_FUNCS_pop_free(name_funcs_stack,name_funcs_free);
- names_lh=NULL;
- name_funcs_stack = NULL;
- }
- else
- names_lh->down_load=down_load;
- }