err.c

err加解密算法程序包

 * that occurs in ERR_str_reasons, or bogus reason strings
 * will be returned for SYSerr(), which always gets an errno
 * value and never one of those 'standard' reason codes. */

static void build_SYS_str_reasons()
	{
	/* OPENSSL_malloc cannot be used here, use static storage instead */
	static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
	int i;
	static int init = 1;

	if (!init) return;

	CRYPTO_w_lock(CRYPTO_LOCK_ERR);

	for (i = 1; i <= NUM_SYS_STR_REASONS; i++)
		{
		ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];

		str->error = (unsigned long)i;
		if (str->string == NULL)
			{
			char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
			char *src = strerror(i);
			if (src != NULL)
				{
				strncpy(*dest, src, sizeof *dest);
				(*dest)[sizeof *dest - 1] = '\0';
				str->string = *dest;
				}
			}
		if (str->string == NULL)
			str->string = "unknown";
		}

	/* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL},
	 * as required by ERR_load_strings. */

	init = 0;
	
	CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
	}
#endif

#define err_clear_data(p,i) \
	if (((p)->err_data[i] != NULL) && \
		(p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
		{  \
		OPENSSL_free((p)->err_data[i]); \
		(p)->err_data[i]=NULL; \
		} \
	(p)->err_data_flags[i]=0;

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);
	}

void ERR_load_ERR_strings(void)
	{
	err_fns_check();
#ifndef OPENSSL_NO_ERR
	err_load_strings(0,ERR_str_libraries);
	err_load_strings(0,ERR_str_reasons);
	err_load_strings(ERR_LIB_SYS,ERR_str_functs);
	build_SYS_str_reasons();
	err_load_strings(ERR_LIB_SYS,SYS_str_reasons);
#endif
	}

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

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

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

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

/********************************************************/

void ERR_put_error(int lib, int func, int reason, const char *file,
	     int line)
	{
	ERR_STATE *es;

#ifdef _OSD_POSIX
	/* In the BS2000-OSD POSIX subsystem, the compiler generates
	 * path names in the form "*POSIX(/etc/passwd)".
	 * This dirty hack strips them to something sensible.
	 * @@@ We shouldn't modify a const string, though.
	 */
	if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
		char *end;

		/* Skip the "*POSIX(" prefix */
		file += sizeof("*POSIX(")-1;
		end = &file[strlen(file)-1];
		if (*end == ')')
			*end = '\0';
		/* Optional: use the basename of the path only. */
		if ((end = strrchr(file, '/')) != NULL)
			file = &end[1];
	}
#endif
	es=ERR_get_state();

	es->top=(es->top+1)%ERR_NUM_ERRORS;
	if (es->top == es->bottom)
		es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
	es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
	es->err_file[es->top]=file;
	es->err_line[es->top]=line;
	err_clear_data(es,es->top);
	}

void ERR_clear_error(void)
	{
	int i;
	ERR_STATE *es;

	es=ERR_get_state();

	for (i=0; i<ERR_NUM_ERRORS; i++)
		{
		es->err_buffer[i]=0;
		err_clear_data(es,i);
		es->err_file[i]=NULL;
		es->err_line[i]= -1;
		}
	es->top=es->bottom=0;
	}


unsigned long ERR_get_error(void)
	{ return(get_error_values(1,0,NULL,NULL,NULL,NULL)); }

unsigned long ERR_get_error_line(const char **file,
	     int *line)
	{ return(get_error_values(1,0,file,line,NULL,NULL)); }

unsigned long ERR_get_error_line_data(const char **file, int *line,
	     const char **data, int *flags)
	{ return(get_error_values(1,0,file,line,data,flags)); }


unsigned long ERR_peek_error(void)
	{ return(get_error_values(0,0,NULL,NULL,NULL,NULL)); }

unsigned long ERR_peek_error_line(const char **file, int *line)
	{ return(get_error_values(0,0,file,line,NULL,NULL)); }

unsigned long ERR_peek_error_line_data(const char **file, int *line,
	     const char **data, int *flags)
	{ return(get_error_values(0,0,file,line,data,flags)); }


unsigned long ERR_peek_last_error(void)
	{ return(get_error_values(0,1,NULL,NULL,NULL,NULL)); }

unsigned long ERR_peek_last_error_line(const char **file, int *line)
	{ return(get_error_values(0,1,file,line,NULL,NULL)); }

unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
	     const char **data, int *flags)
	{ return(get_error_values(0,1,file,line,data,flags)); }


static unsigned long get_error_values(int inc, int top, const char **file, int *line,
	     const char **data, int *flags)
	{	
	int i=0;
	ERR_STATE *es;
	unsigned long ret;

	es=ERR_get_state();

	if (inc && top)
		{
		if (file) *file = "";
		if (line) *line = 0;
		if (data) *data = "";
		if (flags) *flags = 0;
			
		return ERR_R_INTERNAL_ERROR;
		}

	if (es->bottom == es->top) return 0;
	if (top)
		i=es->top;			 /* last error */
	else
		i=(es->bottom+1)%ERR_NUM_ERRORS; /* first error */

	ret=es->err_buffer[i];
	if (inc)
		{
		es->bottom=i;
		es->err_buffer[i]=0;
		}

	if ((file != NULL) && (line != NULL))
		{
		if (es->err_file[i] == NULL)
			{
			*file="NA";
			if (line != NULL) *line=0;
			}
		else
			{
			*file=es->err_file[i];
			if (line != NULL) *line=es->err_line[i];
			}
		}

	if (data == NULL)
		{
		if (inc)
			{
			err_clear_data(es, i);
			}
		}
	else
		{
		if (es->err_data[i] == NULL)
			{
			*data="";
			if (flags != NULL) *flags=0;
			}
		else
			{
			*data=es->err_data[i];
			if (flags != NULL) *flags=es->err_data_flags[i];
			}
		}
	return ret;
	}

void ERR_error_string_n(unsigned long e, char *buf, size_t len)
	{
	char lsbuf[64], fsbuf[64], rsbuf[64];
	const char *ls,*fs,*rs;
	unsigned long l,f,r;

	l=ERR_GET_LIB(e);
	f=ERR_GET_FUNC(e);
	r=ERR_GET_REASON(e);

	ls=ERR_lib_error_string(e);
	fs=ERR_func_error_string(e);
	rs=ERR_reason_error_string(e);

	if (ls == NULL) 
		BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
	if (fs == NULL)
		BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
	if (rs == NULL)
		BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);

	BIO_snprintf(buf, len,"error:%08lX:%s:%s:%s", e, ls?ls:lsbuf, 
		fs?fs:fsbuf, rs?rs:rsbuf);
	if (strlen(buf) == len-1)
		{
		/* output may be truncated; make sure we always have 5 
		 * colon-separated fields, i.e. 4 colons ... */
#define NUM_COLONS 4
		if (len > NUM_COLONS) /* ... if possible */
			{
			int i;
			char *s = buf;
			
			for (i = 0; i < NUM_COLONS; i++)
				{
				char *colon = strchr(s, ':');
				if (colon == NULL || colon > &buf[len-1] - NUM_COLONS + i)
					{
					/* set colon no. i at last possible position
					 * (buf[len-1] is the terminating 0)*/
					colon = &buf[len-1] - NUM_COLONS + i;
					*colon = ':';
					}
				s = colon + 1;
				}
			}
		}
	}

/* BAD for multi-threading: uses a local buffer if ret == NULL */
/* ERR_error_string_n should be used instead for ret != NULL
 * as ERR_error_string cannot know how large the buffer is */
char *ERR_error_string(unsigned long e, char *ret)
	{
	static char buf[256];

	if (ret == NULL) ret=buf;
	ERR_error_string_n(e, ret, 256);

	return ret;
	}

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=((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)(((ERR_STRING_DATA *)a_void)->error -
			((ERR_STRING_DATA *)b_void)->error));
	}

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

void ERR_remove_state(unsigned long pid)
	{
	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);
	}

ERR_STATE *ERR_get_state(void)
	{
	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;
	}

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

void ERR_set_error_data(char *data, int flags)
	{
	ERR_STATE *es;
	int i;

	es=ERR_get_state();

	i=es->top;
	if (i == 0)
		i=ERR_NUM_ERRORS-1;

	err_clear_data(es,i);
	es->err_data[i]=data;
	es->err_data_flags[i]=flags;
	}

void ERR_add_error_data(int num, ...)
	{
	va_list args;
	int i,n,s;
	char *str,*p,*a;

	s=80;
	str=OPENSSL_malloc(s+1);
	if (str == NULL) return;
	str[0]='\0';

	va_start(args, num);
	n=0;
	for (i=0; i<num; i++)
		{
		a=va_arg(args, char*);
		/* ignore NULLs, thanks to Bob Beck <[e-mail]> */
		if (a != NULL)
			{
			n+=strlen(a);
			if (n > s)
				{
				s=n+20;
				p=OPENSSL_realloc(str,s+1);
				if (p == NULL)
					{
					OPENSSL_free(str);
					goto err;
					}
				else
					str=p;
				}
			BUF_strlcat(str,a,s+1);
			}
		}
	ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);

err:
	va_end(args);
	}