err_def.c

OpenSSL 0.9.8k 最新版OpenSSL

	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);

	return p;
	}

static LHASH *int_thread_get(int create)
	{
	LHASH *ret = NULL;

	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
	if (!int_thread_hash && create)
		{
		CRYPTO_push_info("int_thread_get (err.c)");
		int_thread_hash = lh_new(pid_hash, pid_cmp);
		CRYPTO_pop_info();
		}
	if (int_thread_hash)
		{
		int_thread_hash_references++;
		ret = int_thread_hash;
		}
	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
	return ret;
	}

static void int_thread_release(LHASH **hash)
	{
	int i;

	if (hash == NULL || *hash == NULL)
		return;

	i = CRYPTO_add(&int_thread_hash_references, -1, CRYPTO_LOCK_ERR);

#ifdef REF_PRINT
	fprintf(stderr,"%4d:%s\n",int_thread_hash_references,"ERR");
#endif
	if (i > 0) return;
#ifdef REF_CHECK
	if (i < 0)
		{
		fprintf(stderr,"int_thread_release, bad reference count\n");
		abort(); /* ok */
		}
#endif
	*hash = NULL;
	}

static ERR_STATE *int_thread_get_item(const ERR_STATE *d)
	{
	ERR_STATE *p;
	LHASH *hash;

	err_fns_check();
	hash = ERRFN(thread_get)(0);
	if (!hash)
		return NULL;

	CRYPTO_r_lock(CRYPTO_LOCK_ERR);
	p = (ERR_STATE *)lh_retrieve(hash, d);
	CRYPTO_r_unlock(CRYPTO_LOCK_ERR);

	ERRFN(thread_release)(&hash);
	return p;
	}

static ERR_STATE *int_thread_set_item(ERR_STATE *d)
	{
	ERR_STATE *p;
	LHASH *hash;

	err_fns_check();
	hash = ERRFN(thread_get)(1);
	if (!hash)
		return NULL;

	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
	p = (ERR_STATE *)lh_insert(hash, d);
	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);

	ERRFN(thread_release)(&hash);
	return p;
	}

static void int_thread_del_item(const ERR_STATE *d)
	{
	ERR_STATE *p;
	LHASH *hash;

	err_fns_check();
	hash = ERRFN(thread_get)(0);
	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_references == 1
		&& int_thread_hash && (lh_num_items(int_thread_hash) == 0))
		{
		lh_free(int_thread_hash);
		int_thread_hash = NULL;
		}
	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);

	ERRFN(thread_release)(&hash);
	if (p)
		ERR_STATE_free(p);
	}

static int int_err_get_next_lib(void)
	{
	int ret;

	CRYPTO_w_lock(CRYPTO_LOCK_ERR);
	ret = int_err_library_number++;
	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);

	return ret;
	}

static void ERR_STATE_free(ERR_STATE *s)
	{
	int i;

	if (s == NULL)
	    return;

	for (i=0; i<ERR_NUM_ERRORS; i++)
		{
		err_clear_data(s,i);
		}
	OPENSSL_free(s);
	}

static void err_load_strings(int lib, ERR_STRING_DATA *str)
	{
	while (str->error)
		{
		if (lib)
			str->error|=ERR_PACK(lib,0,0);
		ERRFN(err_set_item)(str);
		str++;
		}
	}

void ERR_load_strings(int lib, ERR_STRING_DATA *str)
	{
	err_fns_check();
	err_load_strings(lib, str);
	}

void ERR_unload_strings(int lib, ERR_STRING_DATA *str)
	{
	while (str->error)
		{
		if (lib)
			str->error|=ERR_PACK(lib,0,0);
		ERRFN(err_del_item)(str);
		str++;
		}
	}

void ERR_free_strings(void)
	{
	err_fns_check();
	ERRFN(err_del)();
	}

LHASH *ERR_get_string_table(void)
	{
	err_fns_check();
	return ERRFN(err_get)(0);
	}

LHASH *ERR_get_err_state_table(void)
	{
	err_fns_check();
	return ERRFN(thread_get)(0);
	}

void ERR_release_err_state_table(LHASH **hash)
	{
	err_fns_check();
	ERRFN(thread_release)(hash);
	}

const char *ERR_lib_error_string(unsigned long e)
	{
	ERR_STRING_DATA d,*p;
	unsigned long l;

	err_fns_check();
	l=ERR_GET_LIB(e);
	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;
	unsigned long l,f;

	err_fns_check();
	l=ERR_GET_LIB(e);
	f=ERR_GET_FUNC(e);
	d.error=ERR_PACK(l,f,0);
	p=ERRFN(err_get_item)(&d);
	return((p == NULL)?NULL:p->string);
	}

const char *ERR_reason_error_string(unsigned long e)
	{
	ERR_STRING_DATA d,*p=NULL;
	unsigned long l,r;

	err_fns_check();
	l=ERR_GET_LIB(e);
	r=ERR_GET_REASON(e);
	d.error=ERR_PACK(l,0,r);
	p=ERRFN(err_get_item)(&d);
	if (!p)
		{
		d.error=ERR_PACK(0,0,r);
		p=ERRFN(err_get_item)(&d);
		}
	return((p == NULL)?NULL:p->string);
	}

/* static unsigned long err_hash(ERR_STRING_DATA *a) */
static unsigned long err_hash(const void *a_void)
	{
	unsigned long ret,l;

	l=((const ERR_STRING_DATA *)a_void)->error;
	ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
	return(ret^ret%19*13);
	}

/* static int err_cmp(ERR_STRING_DATA *a, ERR_STRING_DATA *b) */
static int err_cmp(const void *a_void, const void *b_void)
	{
	return((int)(((const ERR_STRING_DATA *)a_void)->error -
			((const ERR_STRING_DATA *)b_void)->error));
	}

/* static unsigned long pid_hash(ERR_STATE *a) */
static unsigned long pid_hash(const void *a_void)
	{
	return(((const ERR_STATE *)a_void)->pid*13);
	}

/* static int pid_cmp(ERR_STATE *a, ERR_STATE *b) */
static int pid_cmp(const void *a_void, const void *b_void)
	{
	return((int)((long)((const ERR_STATE *)a_void)->pid -
			(long)((const ERR_STATE *)b_void)->pid));
	}
#ifdef OPENSSL_FIPS
static void int_err_remove_state(unsigned long pid)
#else
void ERR_remove_state(unsigned long pid)
#endif
	{
	ERR_STATE tmp;

	err_fns_check();
	if (pid == 0)
		pid=(unsigned long)CRYPTO_thread_id();
	tmp.pid=pid;
	/* thread_del_item automatically destroys the LHASH if the number of
	 * items reaches zero. */
	ERRFN(thread_del_item)(&tmp);
	}

#ifdef OPENSSL_FIPS
	static ERR_STATE *int_err_get_state(void)
#else
ERR_STATE *ERR_get_state(void)
#endif
	{
	static ERR_STATE fallback;
	ERR_STATE *ret,tmp,*tmpp=NULL;
	int i;
	unsigned long pid;

	err_fns_check();
	pid=(unsigned long)CRYPTO_thread_id();
	tmp.pid=pid;
	ret=ERRFN(thread_get_item)(&tmp);

	/* ret == the error state, if NULL, make a new one */
	if (ret == NULL)
		{
		ret=(ERR_STATE *)OPENSSL_malloc(sizeof(ERR_STATE));
		if (ret == NULL) return(&fallback);
		ret->pid=pid;
		ret->top=0;
		ret->bottom=0;
		for (i=0; i<ERR_NUM_ERRORS; i++)
			{
			ret->err_data[i]=NULL;
			ret->err_data_flags[i]=0;
			}
		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 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;
	}

#ifdef OPENSSL_FIPS
void int_ERR_lib_init(void)
	{
	int_ERR_set_state_func(int_err_get_state, int_err_remove_state);
	}
#endif

int ERR_get_next_error_library(void)
	{
	err_fns_check();
	return ERRFN(get_next_lib)();
	}