io.c revision 56664548661c43ae04de4a32bce3510ed36aeaf9
/*
* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
* Copyright (c) 1990 Regents of the University of Michigan.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of Michigan at Ann Arbor. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <stdlib.h>
#include <ber_der.h>
#include "kmfber_int.h"
#define EXBUFSIZ 1024
/*
* Note: kmfber_read() only uses the ber_end and ber_ptr elements of ber.
* Functions like kmfber_get_tag(), kmfber_skip_tag, and kmfber_peek_tag()
* rely on that fact, so if this code is changed to use any additional
* elements of the ber structure, those functions will need to be changed
* as well.
*/
ber_int_t
kmfber_read(BerElement *ber, char *buf, ber_len_t len)
{
size_t actuallen;
size_t nleft;
nleft = ber->ber_end - ber->ber_ptr;
actuallen = nleft < len ? nleft : len;
(void) memmove(buf, ber->ber_ptr, (size_t)actuallen);
ber->ber_ptr += actuallen;
return ((ber_int_t)actuallen);
}
/*
* enlarge the ber buffer.
* return 0 on success, -1 on error.
*/
int
kmfber_realloc(BerElement *ber, ber_len_t len)
{
ber_uint_t need, have, total;
size_t have_bytes;
Seqorset *s;
size_t off;
char *oldbuf;
boolean_t freeold = B_FALSE;
have_bytes = ber->ber_end - ber->ber_buf;
have = have_bytes / EXBUFSIZ;
need = (len < EXBUFSIZ ? 1 : (len + (EXBUFSIZ - 1)) / EXBUFSIZ);
total = have * EXBUFSIZ + need * EXBUFSIZ;
oldbuf = ber->ber_buf;
if (ber->ber_buf == NULL) {
if ((ber->ber_buf = (char *)malloc((size_t)total))
== NULL) {
return (-1);
}
ber->ber_flags &= ~KMFBER_FLAG_NO_FREE_BUFFER;
} else {
if (ber->ber_flags & KMFBER_FLAG_NO_FREE_BUFFER) {
/* transition to malloc'd buffer */
if ((ber->ber_buf = (char *)malloc(
(size_t)total)) == NULL) {
free(oldbuf);
return (-1);
}
ber->ber_flags &= ~KMFBER_FLAG_NO_FREE_BUFFER;
/* copy existing data into new malloc'd buffer */
(void) memmove(ber->ber_buf, oldbuf, have_bytes);
freeold = B_TRUE;
} else {
if ((ber->ber_buf = (char *)realloc(
ber->ber_buf, (size_t)total)) == NULL) {
return (-1);
}
freeold = B_FALSE; /* it was just realloced */
}
}
ber->ber_end = ber->ber_buf + total;
/*
* If the stinking thing was moved, we need to go through and
* reset all the sos and ber pointers. Offsets would've been
* a better idea... oh well.
*/
if (ber->ber_buf != oldbuf) {
ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
for (s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next) {
off = s->sos_first - oldbuf;
s->sos_first = ber->ber_buf + off;
off = s->sos_ptr - oldbuf;
s->sos_ptr = ber->ber_buf + off;
}
}
if (freeold && oldbuf != NULL)
free(oldbuf);
return (0);
}
/*
* returns "len" on success and -1 on failure.
*/
ber_int_t
kmfber_write(BerElement *ber, char *buf, ber_len_t len, int nosos)
{
if (nosos || ber->ber_sos == NULL) {
if (ber->ber_ptr + len > ber->ber_end) {
if (kmfber_realloc(ber, len) != 0)
return (-1);
}
(void) memmove(ber->ber_ptr, buf, (size_t)len);
ber->ber_ptr += len;
return (len);
} else {
if (ber->ber_sos->sos_ptr + len > ber->ber_end) {
if (kmfber_realloc(ber, len) != 0)
return (-1);
}
(void) memmove(ber->ber_sos->sos_ptr, buf, (size_t)len);
ber->ber_sos->sos_ptr += len;
ber->ber_sos->sos_clen += len;
return (len);
}
}
void
kmfber_free(BerElement *ber, int freebuf)
{
if (ber != NULL) {
if (freebuf &&
!(ber->ber_flags & KMFBER_FLAG_NO_FREE_BUFFER))
free(ber->ber_buf);
free((char *)ber);
}
}
/* we pre-allocate a buffer to save the extra malloc later */
BerElement *
kmfber_alloc_t(int options)
{
BerElement *ber;
if ((ber = (BerElement*)calloc(1,
sizeof (struct berelement) + EXBUFSIZ)) == NULL) {
return (NULL);
}
ber->ber_tag = KMFBER_DEFAULT;
ber->ber_options = options;
ber->ber_buf = (char *)ber + sizeof (struct berelement);
ber->ber_ptr = ber->ber_buf;
ber->ber_end = ber->ber_buf + EXBUFSIZ;
ber->ber_flags = KMFBER_FLAG_NO_FREE_BUFFER;
return (ber);
}
BerElement *
kmfber_alloc()
{
return (kmfber_alloc_t(0));
}
BerElement *
kmfder_alloc()
{
return (kmfber_alloc_t(KMFBER_OPT_USE_DER));
}
BerElement *
kmfber_dup(BerElement *ber)
{
BerElement *new;
if ((new = kmfber_alloc()) == NULL)
return (NULL);
*new = *ber;
return (new);
}
void
ber_init_w_nullchar(BerElement *ber, int options)
{
(void) memset((char *)ber, '\0', sizeof (struct berelement));
ber->ber_tag = KMFBER_DEFAULT;
ber->ber_options = options;
}
void
kmfber_reset(BerElement *ber, int was_writing)
{
if (was_writing) {
ber->ber_end = ber->ber_ptr;
ber->ber_ptr = ber->ber_buf;
} else {
ber->ber_ptr = ber->ber_end;
}
ber->ber_rwptr = NULL;
}
#ifdef KMFBER_DEBUG
void
ber_dump(BerElement *ber, int inout)
{
char msg[128];
sprintf(msg, "ber_dump: buf 0x%lx, ptr 0x%lx, rwptr 0x%lx, end 0x%lx\n",
ber->ber_buf, ber->ber_ptr, ber->ber_rwptr, ber->ber_end);
ber_err_print(msg);
if (inout == 1) {
sprintf(msg, " current len %ld, contents:\n",
ber->ber_end - ber->ber_ptr);
ber_err_print(msg);
lber_bprint(ber->ber_ptr, ber->ber_end - ber->ber_ptr);
} else {
sprintf(msg, " current len %ld, contents:\n",
ber->ber_ptr - ber->ber_buf);
ber_err_print(msg);
lber_bprint(ber->ber_buf, ber->ber_ptr - ber->ber_buf);
}
}
void
ber_sos_dump(Seqorset *sos)
{
char msg[80];
ber_err_print("*** sos dump ***\n");
while (sos != NULLSEQORSET) {
sprintf(msg, "ber_sos_dump: clen %ld first 0x%lx ptr 0x%lx\n",
sos->sos_clen, sos->sos_first, sos->sos_ptr);
ber_err_print(msg);
sprintf(msg, " current len %ld contents:\n",
sos->sos_ptr - sos->sos_first);
ber_err_print(msg);
lber_bprint(sos->sos_first, sos->sos_ptr - sos->sos_first);
sos = sos->sos_next;
}
ber_err_print("*** end dump ***\n");
}
#endif
/* new dboreham code below: */
struct byte_buffer {
unsigned char *p;
int offset;
int length;
};
typedef struct byte_buffer byte_buffer;
/*
* The kmfber_flatten routine allocates a struct berval whose contents
* are a BER encoding taken from the ber argument. The bvPtr pointer
* points to the returned berval, which must be freed using
* kmfber_bvfree(). This routine returns 0 on success and -1 on error.
* The use of kmfber_flatten on a BerElement in which all '{' and '}'
* format modifiers have not been properly matched can result in a
* berval whose contents are not a valid BER encoding.
* Note that the ber_ptr is not modified.
*/
int
kmfber_flatten(BerElement *ber, struct berval **bvPtr)
{
struct berval *new;
ber_len_t len;
/* allocate a struct berval */
new = (struct berval *)malloc((size_t)(sizeof (struct berval)));
if (new == NULL) {
return (-1);
}
(void) memset(new, 0, sizeof (struct berval));
/*
* Copy everything from the BerElement's ber_buf to ber_ptr
* into the berval structure.
*/
if (ber == NULL) {
new->bv_val = NULL;
new->bv_len = 0;
} else {
len = ber->ber_ptr - ber->ber_buf;
new->bv_val = (char *)malloc((size_t)(len + 1));
if (new->bv_val == NULL) {
kmfber_bvfree(new);
return (-1);
}
(void) memmove(new->bv_val, ber->ber_buf, (size_t)len);
new->bv_val[len] = '\0';
new->bv_len = len;
}
/* set bvPtr pointer to point to the returned berval */
*bvPtr = new;
return (0);
}
BerElement *
kmfder_init(const struct berval *bv)
{
BerElement *ber;
/* construct BerElement */
if ((ber = kmfber_alloc_t(KMFBER_OPT_USE_DER)) != NULL) {
/* copy data from the bv argument into BerElement */
/* XXXmcs: had to cast unsigned long bv_len to long */
if ((kmfber_write(ber, bv->bv_val, bv->bv_len, 0)) !=
(ber_slen_t)bv->bv_len) {
kmfber_free(ber, 1);
return (NULL);
}
}
/*
* reset ber_ptr back to the beginning of buffer so that this new
* and initialized ber element can be READ
*/
kmfber_reset(ber, 1);
/*
* return a ptr to a new BerElement containing a copy of the data
* in the bv argument or a null pointer on error
*/
return (ber);
}
BerElement *
kmfber_init(const struct berval *bv)
{
BerElement *ber;
/* construct BerElement */
if ((ber = kmfber_alloc_t(0)) != NULL) {
/* copy data from the bv argument into BerElement */
/* XXXmcs: had to cast unsigned long bv_len to long */
if ((kmfber_write(ber, bv->bv_val, bv->bv_len, 0)) !=
(ber_slen_t)bv->bv_len) {
kmfber_free(ber, 1);
return (NULL);
}
}
/*
* reset ber_ptr back to the beginning of buffer so that this new
* and initialized ber element can be READ
*/
kmfber_reset(ber, 1);
/*
* return a ptr to a new BerElement containing a copy of the data
* in the bv argument or a null pointer on error
*/
return (ber);
}