#include <openssl/bio.h>
#include <openssl/err.h>
-
-static LHASH *error_hash=NULL;
-static LHASH *thread_hash=NULL;
-
-/* static unsigned long err_hash(ERR_STRING_DATA *a); */
-static unsigned long err_hash(const void *a_void);
-/* static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b); */
-static int err_cmp(const void *a_void, const void *b_void);
-/* static unsigned long pid_hash(ERR_STATE *pid); */
-static unsigned long pid_hash(const void *pid_void);
-/* static int pid_cmp(ERR_STATE *a,ERR_STATE *pid); */
-static int pid_cmp(const void *a_void,const void *pid_void);
-static unsigned long get_error_values(int inc,const char **file,int *line,
- const char **data,int *flags);
-
static void ERR_STATE_free(ERR_STATE *s);
#ifndef OPENSSL_NO_ERR
static ERR_STRING_DATA ERR_str_libraries[]=
};
+/* Define the predeclared (but externally opaque) "ERR_FNS" type */
+struct st_ERR_FNS
+ {
+ /* Works on the "error_hash" string table */
+ LHASH *(*cb_err_get)(void);
+ void (*cb_err_del)(void);
+ ERR_STRING_DATA *(*cb_err_get_item)(const ERR_STRING_DATA *);
+ ERR_STRING_DATA *(*cb_err_set_item)(ERR_STRING_DATA *);
+ /* Works on the "thread_hash" error-state table */
+ LHASH *(*cb_thread_get)(void);
+ ERR_STATE *(*cb_thread_get_item)(const ERR_STATE *);
+ ERR_STATE *(*cb_thread_set_item)(ERR_STATE *);
+ void (*cb_thread_del_item)(const ERR_STATE *);
+ /* Returns the next available error "library" numbers */
+ int (*cb_get_next_lib)(void);
+ };
+
+/* Predeclarations of the "err_defaults" functions */
+static LHASH *int_err_get(void);
+static void int_err_del(void);
+static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
+static ERR_STRING_DATA *int_err_set_item(ERR_STRING_DATA *);
+static LHASH *int_thread_get(void);
+static ERR_STATE *int_thread_get_item(const ERR_STATE *);
+static ERR_STATE *int_thread_set_item(ERR_STATE *);
+static void int_thread_del_item(const ERR_STATE *);
+static int int_err_get_next_lib(void);
+/* The static ERR_FNS table using these defaults functions */
+static const ERR_FNS err_defaults =
+ {
+ int_err_get,
+ int_err_del,
+ int_err_get_item,
+ int_err_set_item,
+ int_thread_get,
+ int_thread_get_item,
+ int_thread_set_item,
+ int_thread_del_item,
+ int_err_get_next_lib
+ };
+
+/* The replacable table of ERR_FNS functions we use at run-time */
+static const ERR_FNS *err_fns = NULL;
+
+/* Eg. rather than using "err_get()", use "ERRFN(err_get)()". */
+#define ERRFN(a) err_fns->cb_##a
+
+/* The internal state used by "err_defaults" - as such, the setting, reading,
+ * creating, and deleting of this data should only be permitted via the
+ * "err_defaults" functions. This way, a linked module can completely defer all
+ * ERR state operation (together with requisite locking) to the implementations
+ * and state in the loading application. */
+static LHASH *int_error_hash;
+static int int_error_hash_set = 0;
+static LHASH *int_thread_hash;
+static int int_thread_hash_set = 0;
+static int int_err_library_number=ERR_LIB_USER;
+
+/* Internal function that checks whether "err_fns" is set and if not, sets it to
+ * the defaults. */
+static void err_fns_check(void)
+ {
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ if(!err_fns)
+ err_fns = &err_defaults;
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ }
+
+/* API functions to get or set the underlying ERR functions. */
+
+const ERR_FNS *ERR_get_implementation(void)
+ {
+ err_fns_check();
+ return err_fns;
+ }
+
+int ERR_set_implementation(const ERR_FNS *fns)
+ {
+ int toret = 0;
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ /* It's too late if 'err_fns' is non-NULL. BTW: not much point setting
+ * an error is there?! */
+ if(!err_fns)
+ {
+ err_fns = fns;
+ toret = 1;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ return toret;
+ }
+
+/* These are the callbacks provided to "lh_new()" when creating the LHASH tables
+ * internal to the "err_defaults" implementation. */
+
+/* static unsigned long err_hash(ERR_STRING_DATA *a); */
+static unsigned long err_hash(const void *a_void);
+/* static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b); */
+static int err_cmp(const void *a_void, const void *b_void);
+/* static unsigned long pid_hash(ERR_STATE *pid); */
+static unsigned long pid_hash(const void *pid_void);
+/* static int pid_cmp(ERR_STATE *a,ERR_STATE *pid); */
+static int pid_cmp(const void *a_void,const void *pid_void);
+static unsigned long get_error_values(int inc,const char **file,int *line,
+ const char **data,int *flags);
+
+/* The internal functions used in the "err_defaults" implementation */
+
+static LHASH *int_err_get(void)
+ {
+ LHASH *toret = NULL;
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ if(!int_error_hash_set)
+ int_error_hash = lh_new(err_hash, err_cmp);
+ if(int_error_hash)
+ {
+ int_error_hash_set = 1;
+ toret = int_error_hash;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ return(toret);
+ }
+static void int_err_del(void)
+ {
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ if(int_error_hash_set)
+ {
+ lh_free(int_error_hash);
+ int_error_hash = NULL;
+ int_error_hash_set = 0;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ }
+static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
+ {
+ ERR_STRING_DATA *p;
+ LHASH *hash;
+ err_fns_check();
+ hash = ERRFN(err_get)();
+ if(!hash)
+ return NULL;
+ CRYPTO_r_lock(CRYPTO_LOCK_ERR);
+ p = (ERR_STRING_DATA *)lh_retrieve(hash, d);
+ CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
+ return p;
+ }
+static ERR_STRING_DATA *int_err_set_item(ERR_STRING_DATA *d)
+ {
+ ERR_STRING_DATA *p;
+ LHASH *hash;
+ err_fns_check();
+ hash = ERRFN(err_get)();
+ if(!hash)
+ return NULL;
+ CRYPTO_r_lock(CRYPTO_LOCK_ERR);
+ p = (ERR_STRING_DATA *)lh_insert(hash, d);
+ CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
+ return p;
+ }
+static LHASH *int_thread_get(void)
+ {
+ LHASH *toret = NULL;
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ if(!int_thread_hash_set)
+ int_thread_hash = lh_new(pid_hash, pid_cmp);
+ if(int_thread_hash)
+ {
+ int_thread_hash_set = 1;
+ toret = int_thread_hash;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ return(toret);
+ }
+static ERR_STATE *int_thread_get_item(const ERR_STATE *d)
+ {
+ ERR_STATE *p;
+ LHASH *hash;
+ err_fns_check();
+ hash = ERRFN(thread_get)();
+ if(!hash)
+ return NULL;
+ CRYPTO_r_lock(CRYPTO_LOCK_ERR);
+ p = (ERR_STATE *)lh_retrieve(hash, d);
+ CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
+ return p;
+ }
+static ERR_STATE *int_thread_set_item(ERR_STATE *d)
+ {
+ ERR_STATE *p;
+ LHASH *hash;
+ err_fns_check();
+ hash = ERRFN(thread_get)();
+ if(!hash)
+ return NULL;
+ CRYPTO_r_lock(CRYPTO_LOCK_ERR);
+ p = (ERR_STATE *)lh_insert(hash, d);
+ CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
+ return p;
+ }
+static void int_thread_del_item(const ERR_STATE *d)
+ {
+ ERR_STATE *p;
+ LHASH *hash;
+ err_fns_check();
+ hash = ERRFN(thread_get)();
+ if(!hash)
+ return;
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ p = (ERR_STATE *)lh_delete(hash, d);
+ /* make sure we don't leak memory */
+ if(int_thread_hash_set && (lh_num_items(int_thread_hash) == 0))
+ {
+ lh_free(int_thread_hash);
+ int_thread_hash = NULL;
+ int_thread_hash_set = 0;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ if(p)
+ ERR_STATE_free(p);
+ }
+static int int_err_get_next_lib(void)
+ {
+ int toret;
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ toret = int_err_library_number++;
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ return toret;
+ }
+
+
#define NUM_SYS_STR_REASONS 127
#define LEN_SYS_STR_REASON 32
if (init)
{
+ init=0;
+ /* We put the first-time check code here to reduce the number of
+ * times it is called (then it doesn't get called from
+ * ERR_load_strings() loads of times). */
+ err_fns_check();
#ifndef OPENSSL_NO_ERR
ERR_load_strings(0,ERR_str_libraries);
ERR_load_strings(0,ERR_str_reasons);
build_SYS_str_reasons();
ERR_load_strings(ERR_LIB_SYS,SYS_str_reasons);
#endif
- init=0;
}
}
void ERR_load_strings(int lib, ERR_STRING_DATA *str)
{
- if (error_hash == NULL)
- {
- CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
- error_hash=lh_new(err_hash, err_cmp);
- if (error_hash == NULL)
- {
- CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
- return;
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
-
- ERR_load_ERR_strings();
- }
-
- CRYPTO_w_lock(CRYPTO_LOCK_ERR_HASH);
+ /* Do this if it hasn't been done already (NB: The order of the "init=0"
+ * statement and the recursive calls back to this function prevent a
+ * loop). */
+ ERR_load_ERR_strings();
while (str->error)
{
str->error|=ERR_PACK(lib,0,0);
- lh_insert(error_hash,str);
+ ERRFN(err_set_item)(str);
str++;
}
- CRYPTO_w_unlock(CRYPTO_LOCK_ERR_HASH);
}
void ERR_free_strings(void)
{
- CRYPTO_w_lock(CRYPTO_LOCK_ERR);
-
- if (error_hash != NULL)
- {
- lh_free(error_hash);
- error_hash=NULL;
- }
-
- CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ err_fns_check();
+ ERRFN(err_del)();
}
/********************************************************/
LHASH *ERR_get_string_table(void)
{
- return(error_hash);
+ err_fns_check();
+ return ERRFN(err_get)();
}
-/* not thread-safe */
LHASH *ERR_get_err_state_table(void)
{
- return(thread_hash);
+ err_fns_check();
+ return ERRFN(thread_get)();
}
const char *ERR_lib_error_string(unsigned long e)
{
- ERR_STRING_DATA d,*p=NULL;
+ ERR_STRING_DATA d,*p;
unsigned long l;
+ err_fns_check();
l=ERR_GET_LIB(e);
-
- CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
-
- if (error_hash != NULL)
- {
- d.error=ERR_PACK(l,0,0);
- p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
- }
-
- CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
-
+ d.error=ERR_PACK(l,0,0);
+ p=ERRFN(err_get_item)(&d);
return((p == NULL)?NULL:p->string);
}
const char *ERR_func_error_string(unsigned long e)
{
- ERR_STRING_DATA d,*p=NULL;
+ ERR_STRING_DATA d,*p;
unsigned long l,f;
+ err_fns_check();
l=ERR_GET_LIB(e);
f=ERR_GET_FUNC(e);
-
- CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
-
- if (error_hash != NULL)
- {
- d.error=ERR_PACK(l,f,0);
- p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
- }
-
- CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
-
+ d.error=ERR_PACK(l,f,0);
+ p=ERRFN(err_get_item)(&d);
return((p == NULL)?NULL:p->string);
}
ERR_STRING_DATA d,*p=NULL;
unsigned long l,r;
+ err_fns_check();
l=ERR_GET_LIB(e);
r=ERR_GET_REASON(e);
-
- CRYPTO_r_lock(CRYPTO_LOCK_ERR_HASH);
-
- if (error_hash != NULL)
+ d.error=ERR_PACK(l,0,r);
+ p=ERRFN(err_get_item)(&d);
+ if(!p)
{
- d.error=ERR_PACK(l,0,r);
- p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
- if (p == NULL)
- {
- d.error=ERR_PACK(0,0,r);
- p=(ERR_STRING_DATA *)lh_retrieve(error_hash,&d);
- }
+ d.error=ERR_PACK(0,0,r);
+ p=ERRFN(err_get_item)(&d);
}
-
- CRYPTO_r_unlock(CRYPTO_LOCK_ERR_HASH);
-
return((p == NULL)?NULL:p->string);
}
void ERR_remove_state(unsigned long pid)
{
- ERR_STATE *p = NULL,tmp;
-
- if (thread_hash == NULL)
- return;
+ ERR_STATE tmp;
+ err_fns_check();
if (pid == 0)
pid=(unsigned long)CRYPTO_thread_id();
tmp.pid=pid;
- CRYPTO_w_lock(CRYPTO_LOCK_ERR);
- if (thread_hash)
- {
- p=(ERR_STATE *)lh_delete(thread_hash,&tmp);
- if (lh_num_items(thread_hash) == 0)
- {
- /* make sure we don't leak memory */
- lh_free(thread_hash);
- thread_hash = NULL;
- }
- }
- CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
-
- if (p != NULL) ERR_STATE_free(p);
+ /* thread_del_item automatically destroys the LHASH if the number of
+ * items reaches zero. */
+ ERRFN(thread_del_item)(&tmp);
}
ERR_STATE *ERR_get_state(void)
{
static ERR_STATE fallback;
- ERR_STATE *ret=NULL,tmp,*tmpp=NULL;
- int thread_state_exists;
+ ERR_STATE *ret,tmp,*tmpp=NULL;
int i;
unsigned long pid;
-
+ err_fns_check();
pid=(unsigned long)CRYPTO_thread_id();
-
- CRYPTO_r_lock(CRYPTO_LOCK_ERR);
- if (thread_hash != NULL)
- {
- tmp.pid=pid;
- ret=(ERR_STATE *)lh_retrieve(thread_hash,&tmp);
- }
- CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
+ tmp.pid=pid;
+ ret=ERRFN(thread_get_item)(&tmp);
/* ret == the error state, if NULL, make a new one */
if (ret == NULL)
ret->err_data[i]=NULL;
ret->err_data_flags[i]=0;
}
-
- CRYPTO_w_lock(CRYPTO_LOCK_ERR);
-
- /* no entry yet in thread_hash for current thread -
- * thus, it may have changed since we last looked at it */
- if (thread_hash == NULL)
- thread_hash = lh_new(pid_hash, pid_cmp);
- if (thread_hash == NULL)
- thread_state_exists = 0; /* allocation error */
- else
- {
- tmpp=(ERR_STATE *)lh_insert(thread_hash,ret);
- thread_state_exists = 1;
- }
-
- CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
-
- if (!thread_state_exists)
+ tmpp = ERRFN(thread_set_item)(ret);
+ /* To check if insertion failed, do a get. */
+ if(ERRFN(thread_get_item)(ret) != ret)
{
ERR_STATE_free(ret); /* could not insert it */
return(&fallback);
}
-
- if (tmpp != NULL) /* old entry - should not happen */
- {
+ /* If a race occured in this function and we came second, tmpp
+ * is the first one that we just replaced. */
+ if(tmpp)
ERR_STATE_free(tmpp);
- }
}
return(ret);
}
int ERR_get_next_error_library(void)
{
- static int value=ERR_LIB_USER;
-
- return(value++);
+ err_fns_check();
+ return ERRFN(get_next_lib)();
}
void ERR_set_error_data(char *data, int flags)
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