8d28d5f81b
functions need to be constified, and therefore meant a number of easy changes a little everywhere. Now, if someone could explain to me why OBJ_dup() cheats...
345 lines
7.2 KiB
C
345 lines
7.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/lhash.h>
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#include <openssl/objects.h>
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#include <openssl/safestack.h>
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/* I use the ex_data stuff to manage the identifiers for the obj_name_types
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* that applications may define. I only really use the free function field.
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*/
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static LHASH *names_lh=NULL;
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static int names_type_num=OBJ_NAME_TYPE_NUM;
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typedef struct name_funcs_st
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{
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unsigned long (*hash_func)(const char *name);
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int (*cmp_func)(const char *a,const char *b);
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void (*free_func)(const char *, int, const char *);
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} NAME_FUNCS;
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DECLARE_STACK_OF(NAME_FUNCS)
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IMPLEMENT_STACK_OF(NAME_FUNCS)
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static STACK_OF(NAME_FUNCS) *name_funcs_stack;
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/* The LHASH callbacks now use the raw "void *" prototypes and do per-variable
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* casting in the functions. This prevents function pointer casting without the
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* need for macro-generated wrapper functions. */
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/* static unsigned long obj_name_hash(OBJ_NAME *a); */
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static unsigned long obj_name_hash(const void *a_void);
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/* static int obj_name_cmp(OBJ_NAME *a,OBJ_NAME *b); */
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static int obj_name_cmp(const void *a_void,const void *b_void);
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int OBJ_NAME_init(void)
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{
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if (names_lh != NULL) return(1);
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MemCheck_off();
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names_lh=lh_new(obj_name_hash, obj_name_cmp);
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MemCheck_on();
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return(names_lh != NULL);
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}
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int OBJ_NAME_new_index(unsigned long (*hash_func)(const char *),
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int (*cmp_func)(const char *, const char *),
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void (*free_func)(const char *, int, const char *))
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{
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int ret;
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int i;
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NAME_FUNCS *name_funcs;
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if (name_funcs_stack == NULL)
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{
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MemCheck_off();
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name_funcs_stack=sk_NAME_FUNCS_new_null();
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MemCheck_on();
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}
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if ((name_funcs_stack == NULL))
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{
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/* ERROR */
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return(0);
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}
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ret=names_type_num;
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names_type_num++;
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for (i=sk_NAME_FUNCS_num(name_funcs_stack); i<names_type_num; i++)
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{
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MemCheck_off();
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name_funcs = OPENSSL_malloc(sizeof(NAME_FUNCS));
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name_funcs->hash_func = lh_strhash;
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name_funcs->cmp_func = strcmp;
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name_funcs->free_func = 0; /* NULL is often declared to
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* ((void *)0), which according
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* to Compaq C is not really
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* compatible with a function
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* pointer. -- Richard Levitte*/
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sk_NAME_FUNCS_push(name_funcs_stack,name_funcs);
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MemCheck_on();
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}
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name_funcs = sk_NAME_FUNCS_value(name_funcs_stack, ret);
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if (hash_func != NULL)
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name_funcs->hash_func = hash_func;
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if (cmp_func != NULL)
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name_funcs->cmp_func = cmp_func;
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if (free_func != NULL)
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name_funcs->free_func = free_func;
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return(ret);
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}
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/* static int obj_name_cmp(OBJ_NAME *a, OBJ_NAME *b) */
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static int obj_name_cmp(const void *a_void, const void *b_void)
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{
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int ret;
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OBJ_NAME *a = (OBJ_NAME *)a_void;
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OBJ_NAME *b = (OBJ_NAME *)b_void;
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ret=a->type-b->type;
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if (ret == 0)
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{
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if ((name_funcs_stack != NULL)
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&& (sk_NAME_FUNCS_num(name_funcs_stack) > a->type))
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{
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ret=sk_NAME_FUNCS_value(name_funcs_stack,a->type)
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->cmp_func(a->name,b->name);
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}
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else
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ret=strcmp(a->name,b->name);
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}
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return(ret);
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}
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/* static unsigned long obj_name_hash(OBJ_NAME *a) */
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static unsigned long obj_name_hash(const void *a_void)
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{
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unsigned long ret;
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OBJ_NAME *a = (OBJ_NAME *)a_void;
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if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > a->type))
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{
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ret=sk_NAME_FUNCS_value(name_funcs_stack,a->type)
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->hash_func(a->name);
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}
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else
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{
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ret=lh_strhash(a->name);
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}
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ret^=a->type;
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return(ret);
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}
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const char *OBJ_NAME_get(const char *name, int type)
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{
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OBJ_NAME on,*ret;
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int num=0,alias;
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if (name == NULL) return(NULL);
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if ((names_lh == NULL) && !OBJ_NAME_init()) return(NULL);
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alias=type&OBJ_NAME_ALIAS;
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type&= ~OBJ_NAME_ALIAS;
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on.name=name;
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on.type=type;
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for (;;)
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{
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ret=(OBJ_NAME *)lh_retrieve(names_lh,&on);
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if (ret == NULL) return(NULL);
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if ((ret->alias) && !alias)
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{
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if (++num > 10) return(NULL);
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on.name=ret->data;
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}
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else
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{
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return(ret->data);
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}
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}
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}
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int OBJ_NAME_add(const char *name, int type, const char *data)
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{
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OBJ_NAME *onp,*ret;
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int alias;
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if ((names_lh == NULL) && !OBJ_NAME_init()) return(0);
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alias=type&OBJ_NAME_ALIAS;
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type&= ~OBJ_NAME_ALIAS;
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onp=(OBJ_NAME *)OPENSSL_malloc(sizeof(OBJ_NAME));
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if (onp == NULL)
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{
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/* ERROR */
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return(0);
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}
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onp->name=name;
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onp->alias=alias;
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onp->type=type;
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onp->data=data;
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ret=(OBJ_NAME *)lh_insert(names_lh,onp);
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if (ret != NULL)
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{
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/* free things */
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if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type))
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{
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/* XXX: I'm not sure I understand why the free
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* function should get three arguments...
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* -- Richard Levitte
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*/
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sk_NAME_FUNCS_value(name_funcs_stack,ret->type)
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->free_func(ret->name,ret->type,ret->data);
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}
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OPENSSL_free(ret);
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}
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else
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{
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if (lh_error(names_lh))
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{
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/* ERROR */
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return(0);
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}
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}
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return(1);
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}
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int OBJ_NAME_remove(const char *name, int type)
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{
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OBJ_NAME on,*ret;
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if (names_lh == NULL) return(0);
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type&= ~OBJ_NAME_ALIAS;
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on.name=name;
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on.type=type;
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ret=(OBJ_NAME *)lh_delete(names_lh,&on);
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if (ret != NULL)
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{
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/* free things */
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if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type))
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{
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/* XXX: I'm not sure I understand why the free
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* function should get three arguments...
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* -- Richard Levitte
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*/
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sk_NAME_FUNCS_value(name_funcs_stack,ret->type)
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->free_func(ret->name,ret->type,ret->data);
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}
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OPENSSL_free(ret);
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return(1);
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}
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else
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return(0);
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}
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struct doall
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{
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int type;
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void (*fn)(const OBJ_NAME *,void *arg);
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void *arg;
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};
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static void do_all_fn(const OBJ_NAME *name,struct doall *d)
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{
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if(name->type == d->type)
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d->fn(name,d->arg);
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}
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void OBJ_NAME_do_all(int type,void (*fn)(const OBJ_NAME *,void *arg),void *arg)
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{
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struct doall d;
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d.type=type;
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d.fn=fn;
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d.arg=arg;
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lh_doall_arg(names_lh,(LHASH_DOALL_ARG_FN_TYPE)do_all_fn,&d);
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}
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struct doall_sorted
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{
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int type;
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int n;
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const OBJ_NAME **names;
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};
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static void do_all_sorted_fn(const OBJ_NAME *name,void *d_)
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{
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struct doall_sorted *d=d_;
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if(name->type != d->type)
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return;
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d->names[d->n++]=name;
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}
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static int do_all_sorted_cmp(const void *n1_,const void *n2_)
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{
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const OBJ_NAME * const *n1=n1_;
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const OBJ_NAME * const *n2=n2_;
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return strcmp((*n1)->name,(*n2)->name);
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}
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void OBJ_NAME_do_all_sorted(int type,void (*fn)(const OBJ_NAME *,void *arg),
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void *arg)
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{
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struct doall_sorted d;
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int n;
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d.type=type;
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d.names=OPENSSL_malloc(lh_num_items(names_lh)*sizeof *d.names);
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d.n=0;
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OBJ_NAME_do_all(type,do_all_sorted_fn,&d);
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qsort(d.names,d.n,sizeof *d.names,do_all_sorted_cmp);
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for(n=0 ; n < d.n ; ++n)
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fn(d.names[n],arg);
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OPENSSL_free(d.names);
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}
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static int free_type;
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static void names_lh_free(OBJ_NAME *onp, int type)
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{
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if(onp == NULL)
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return;
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if ((free_type < 0) || (free_type == onp->type))
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{
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OBJ_NAME_remove(onp->name,onp->type);
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}
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}
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static void name_funcs_free(NAME_FUNCS *ptr)
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{
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OPENSSL_free(ptr);
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}
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void OBJ_NAME_cleanup(int type)
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{
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unsigned long down_load;
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if (names_lh == NULL) return;
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free_type=type;
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down_load=names_lh->down_load;
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names_lh->down_load=0;
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lh_doall(names_lh,(LHASH_DOALL_FN_TYPE)names_lh_free);
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if (type < 0)
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{
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lh_free(names_lh);
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sk_NAME_FUNCS_pop_free(name_funcs_stack,name_funcs_free);
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names_lh=NULL;
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name_funcs_stack = NULL;
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}
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else
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names_lh->down_load=down_load;
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}
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