diff options
Diffstat (limited to 'crypto/objects/o_names.c')
| -rw-r--r-- | crypto/objects/o_names.c | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/crypto/objects/o_names.c b/crypto/objects/o_names.c new file mode 100644 index 0000000..adb5731 --- /dev/null +++ b/crypto/objects/o_names.c @@ -0,0 +1,369 @@ +#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; + } + |
