yuzu/externals/libressl/crypto/bio/bio_lib.c

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/* $OpenBSD: bio_lib.c,v 1.35 2022/01/14 08:40:57 tb Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
#include <openssl/bio.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/stack.h>
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#include "bio_local.h"
/*
* Helper function to work out whether to call the new style callback or the old
* one, and translate between the two.
*
* This has a long return type for consistency with the old callback. Similarly
* for the "long" used for "inret"
*/
static long
bio_call_callback(BIO *b, int oper, const char *argp, size_t len, int argi,
long argl, long inret, size_t *processed)
{
long ret;
int bareoper;
if (b->callback_ex != NULL)
return b->callback_ex(b, oper, argp, len, argi, argl, inret,
processed);
/*
* We have an old style callback, so we will have to do nasty casts and
* check for overflows.
*/
bareoper = oper & ~BIO_CB_RETURN;
if (bareoper == BIO_CB_READ || bareoper == BIO_CB_WRITE ||
bareoper == BIO_CB_GETS) {
/* In this case len is set and should be used instead of argi. */
if (len > INT_MAX)
return -1;
argi = (int)len;
}
if (inret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
if (*processed > INT_MAX)
return -1;
inret = *processed;
}
ret = b->callback(b, oper, argp, argi, argl, inret);
if (ret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
*processed = (size_t)ret;
ret = 1;
}
return ret;
}
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int
BIO_get_new_index(void)
{
static int bio_type_index = BIO_TYPE_START;
int index;
/* The index will collide with the BIO flag bits if it exceeds 255. */
index = CRYPTO_add(&bio_type_index, 1, CRYPTO_LOCK_BIO);
if (index > 255)
return -1;
return index;
}
BIO *
BIO_new(const BIO_METHOD *method)
{
BIO *ret = NULL;
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/* XXX calloc */
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ret = malloc(sizeof(BIO));
if (ret == NULL) {
BIOerror(ERR_R_MALLOC_FAILURE);
return (NULL);
}
if (!BIO_set(ret, method)) {
free(ret);
ret = NULL;
}
return (ret);
}
int
BIO_set(BIO *bio, const BIO_METHOD *method)
{
bio->method = method;
bio->callback = NULL;
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bio->callback_ex = NULL;
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bio->cb_arg = NULL;
bio->init = 0;
bio->shutdown = 1;
bio->flags = 0;
bio->retry_reason = 0;
bio->num = 0;
bio->ptr = NULL;
bio->prev_bio = NULL;
bio->next_bio = NULL;
bio->references = 1;
bio->num_read = 0L;
bio->num_write = 0L;
CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
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if (method->create != NULL) {
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if (!method->create(bio)) {
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio,
&bio->ex_data);
return (0);
}
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}
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return (1);
}
int
BIO_free(BIO *a)
{
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int ret;
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if (a == NULL)
return (0);
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if (CRYPTO_add(&a->references, -1, CRYPTO_LOCK_BIO) > 0)
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return (1);
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if (a->callback != NULL || a->callback_ex != NULL) {
if ((ret = (int)bio_call_callback(a, BIO_CB_FREE, NULL, 0, 0,
0L, 1L, NULL)) <= 0)
return (ret);
}
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
if (a->method != NULL && a->method->destroy != NULL)
a->method->destroy(a);
free(a);
return (1);
}
void
BIO_vfree(BIO *a)
{
BIO_free(a);
}
int
BIO_up_ref(BIO *bio)
{
int refs = CRYPTO_add(&bio->references, 1, CRYPTO_LOCK_BIO);
return (refs > 1) ? 1 : 0;
}
void *
BIO_get_data(BIO *a)
{
return (a->ptr);
}
void
BIO_set_data(BIO *a, void *ptr)
{
a->ptr = ptr;
}
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int
BIO_get_init(BIO *a)
{
return a->init;
}
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void
BIO_set_init(BIO *a, int init)
{
a->init = init;
}
int
BIO_get_shutdown(BIO *a)
{
return (a->shutdown);
}
void
BIO_set_shutdown(BIO *a, int shut)
{
a->shutdown = shut;
}
void
BIO_clear_flags(BIO *b, int flags)
{
b->flags &= ~flags;
}
int
BIO_test_flags(const BIO *b, int flags)
{
return (b->flags & flags);
}
void
BIO_set_flags(BIO *b, int flags)
{
b->flags |= flags;
}
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BIO_callback_fn
BIO_get_callback(const BIO *b)
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{
return b->callback;
}
void
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BIO_set_callback(BIO *b, BIO_callback_fn cb)
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{
b->callback = cb;
}
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BIO_callback_fn_ex
BIO_get_callback_ex(const BIO *b)
{
return b->callback_ex;
}
void
BIO_set_callback_ex(BIO *b, BIO_callback_fn_ex cb)
{
b->callback_ex = cb;
}
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void
BIO_set_callback_arg(BIO *b, char *arg)
{
b->cb_arg = arg;
}
char *
BIO_get_callback_arg(const BIO *b)
{
return b->cb_arg;
}
const char *
BIO_method_name(const BIO *b)
{
return b->method->name;
}
int
BIO_method_type(const BIO *b)
{
return b->method->type;
}
int
BIO_read(BIO *b, void *out, int outl)
{
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size_t readbytes = 0;
int ret;
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if (b == NULL)
return (0);
if (out == NULL || outl <= 0)
return (0);
if (b->method == NULL || b->method->bread == NULL) {
BIOerror(BIO_R_UNSUPPORTED_METHOD);
return (-2);
}
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if (b->callback != NULL || b->callback_ex != NULL) {
if ((ret = (int)bio_call_callback(b, BIO_CB_READ, out, outl, 0,
0L, 1L, NULL)) <= 0)
return (ret);
}
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if (!b->init) {
BIOerror(BIO_R_UNINITIALIZED);
return (-2);
}
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if ((ret = b->method->bread(b, out, outl)) > 0)
readbytes = (size_t)ret;
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b->num_read += readbytes;
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if (b->callback != NULL || b->callback_ex != NULL) {
ret = (int)bio_call_callback(b, BIO_CB_READ | BIO_CB_RETURN,
out, outl, 0, 0L, (ret > 0) ? 1 : ret, &readbytes);
}
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if (ret > 0) {
if (readbytes > INT_MAX) {
BIOerror(BIO_R_LENGTH_TOO_LONG);
ret = -1;
} else {
ret = (int)readbytes;
}
}
return (ret);
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}
int
BIO_write(BIO *b, const void *in, int inl)
{
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size_t writebytes = 0;
int ret;
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if (b == NULL)
return (0);
if (in == NULL || inl <= 0)
return (0);
if (b->method == NULL || b->method->bwrite == NULL) {
BIOerror(BIO_R_UNSUPPORTED_METHOD);
return (-2);
}
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if (b->callback != NULL || b->callback_ex != NULL) {
if ((ret = (int)bio_call_callback(b, BIO_CB_WRITE, in, inl, 0,
0L, 1L, NULL)) <= 0)
return (ret);
}
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if (!b->init) {
BIOerror(BIO_R_UNINITIALIZED);
return (-2);
}
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if ((ret = b->method->bwrite(b, in, inl)) > 0)
writebytes = ret;
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b->num_write += writebytes;
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if (b->callback != NULL || b->callback_ex != NULL) {
ret = (int)bio_call_callback(b, BIO_CB_WRITE | BIO_CB_RETURN,
in, inl, 0, 0L, (ret > 0) ? 1 : ret, &writebytes);
}
if (ret > 0) {
if (writebytes > INT_MAX) {
BIOerror(BIO_R_LENGTH_TOO_LONG);
ret = -1;
} else {
ret = (int)writebytes;
}
}
return (ret);
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}
int
BIO_puts(BIO *b, const char *in)
{
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size_t writebytes = 0;
int ret;
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if (b == NULL || b->method == NULL || b->method->bputs == NULL) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
return (-2);
}
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if (b->callback != NULL || b->callback_ex != NULL) {
if ((ret = (int)bio_call_callback(b, BIO_CB_PUTS, in, 0, 0, 0L,
1L, NULL)) <= 0)
return (ret);
}
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if (!b->init) {
BIOerror(BIO_R_UNINITIALIZED);
return (-2);
}
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if ((ret = b->method->bputs(b, in)) > 0)
writebytes = ret;
b->num_write += writebytes;
if (b->callback != NULL || b->callback_ex != NULL) {
ret = (int)bio_call_callback(b, BIO_CB_PUTS | BIO_CB_RETURN,
in, 0, 0, 0L, (ret > 0) ? 1 : ret, &writebytes);
}
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if (ret > 0) {
if (writebytes > INT_MAX) {
BIOerror(BIO_R_LENGTH_TOO_LONG);
ret = -1;
} else {
ret = (int)writebytes;
}
}
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return (ret);
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}
int
BIO_gets(BIO *b, char *in, int inl)
{
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size_t readbytes;
int ret;
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if (b == NULL || b->method == NULL || b->method->bgets == NULL) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
return (-2);
}
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if (b->callback != NULL || b->callback_ex != NULL) {
if ((ret = (int)bio_call_callback(b, BIO_CB_GETS, in, inl, 0, 0L,
1, NULL)) <= 0)
return (ret);
}
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if (!b->init) {
BIOerror(BIO_R_UNINITIALIZED);
return (-2);
}
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if ((ret = b->method->bgets(b, in, inl)) > 0)
readbytes = ret;
if (b->callback != NULL || b->callback_ex != NULL) {
ret = (int)bio_call_callback(b, BIO_CB_GETS | BIO_CB_RETURN, in,
inl, 0, 0L, (ret > 0) ? 1 : ret, &readbytes);
}
if (ret > 0) {
if (readbytes > INT_MAX) {
BIOerror(BIO_R_LENGTH_TOO_LONG);
ret = -1;
} else {
ret = (int)readbytes;
}
}
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return (ret);
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}
int
BIO_indent(BIO *b, int indent, int max)
{
if (indent > max)
indent = max;
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if (indent < 0)
indent = 0;
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while (indent--)
if (BIO_puts(b, " ") != 1)
return 0;
return 1;
}
long
BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
{
int i;
i = iarg;
return (BIO_ctrl(b, cmd, larg, (char *)&i));
}
char *
BIO_ptr_ctrl(BIO *b, int cmd, long larg)
{
char *p = NULL;
if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
return (NULL);
else
return (p);
}
long
BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
{
long ret;
if (b == NULL)
return (0);
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if (b->method == NULL || b->method->ctrl == NULL) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
return (-2);
}
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if (b->callback != NULL || b->callback_ex != NULL) {
if ((ret = bio_call_callback(b, BIO_CB_CTRL, parg, 0, cmd, larg,
1L, NULL)) <= 0)
return (ret);
}
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ret = b->method->ctrl(b, cmd, larg, parg);
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if (b->callback != NULL || b->callback_ex != NULL) {
ret = bio_call_callback(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, 0,
cmd, larg, ret, NULL);
}
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return (ret);
}
long
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BIO_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
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{
long ret;
if (b == NULL)
return (0);
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if (b->method == NULL || b->method->callback_ctrl == NULL ||
cmd != BIO_CTRL_SET_CALLBACK) {
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BIOerror(BIO_R_UNSUPPORTED_METHOD);
return (-2);
}
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if (b->callback != NULL || b->callback_ex != NULL) {
if ((ret = bio_call_callback(b, BIO_CB_CTRL, (void *)&fp, 0,
cmd, 0, 1L, NULL)) <= 0)
return (ret);
}
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ret = b->method->callback_ctrl(b, cmd, fp);
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if (b->callback != NULL || b->callback_ex != NULL) {
ret = bio_call_callback(b, BIO_CB_CTRL | BIO_CB_RETURN,
(void *)&fp, 0, cmd, 0, ret, NULL);
}
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return (ret);
}
/* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
* do; but those macros have inappropriate return type, and for interfacing
* from other programming languages, C macros aren't much of a help anyway. */
size_t
BIO_ctrl_pending(BIO *bio)
{
return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
}
size_t
BIO_ctrl_wpending(BIO *bio)
{
return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
}
/* put the 'bio' on the end of b's list of operators */
BIO *
BIO_push(BIO *b, BIO *bio)
{
BIO *lb;
if (b == NULL)
return (bio);
lb = b;
while (lb->next_bio != NULL)
lb = lb->next_bio;
lb->next_bio = bio;
if (bio != NULL)
bio->prev_bio = lb;
/* called to do internal processing */
BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
return (b);
}
/* Remove the first and return the rest */
BIO *
BIO_pop(BIO *b)
{
BIO *ret;
if (b == NULL)
return (NULL);
ret = b->next_bio;
BIO_ctrl(b, BIO_CTRL_POP, 0, b);
if (b->prev_bio != NULL)
b->prev_bio->next_bio = b->next_bio;
if (b->next_bio != NULL)
b->next_bio->prev_bio = b->prev_bio;
b->next_bio = NULL;
b->prev_bio = NULL;
return (ret);
}
BIO *
BIO_get_retry_BIO(BIO *bio, int *reason)
{
BIO *b, *last;
b = last = bio;
for (;;) {
if (!BIO_should_retry(b))
break;
last = b;
b = b->next_bio;
if (b == NULL)
break;
}
if (reason != NULL)
*reason = last->retry_reason;
return (last);
}
int
BIO_get_retry_reason(BIO *bio)
{
return (bio->retry_reason);
}
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void
BIO_set_retry_reason(BIO *bio, int reason)
{
bio->retry_reason = reason;
}
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BIO *
BIO_find_type(BIO *bio, int type)
{
int mt, mask;
if (!bio)
return NULL;
mask = type & 0xff;
do {
if (bio->method != NULL) {
mt = bio->method->type;
if (!mask) {
if (mt & type)
return (bio);
} else if (mt == type)
return (bio);
}
bio = bio->next_bio;
} while (bio != NULL);
return (NULL);
}
BIO *
BIO_next(BIO *b)
{
if (!b)
return NULL;
return b->next_bio;
}
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void
BIO_set_next(BIO *b, BIO *next)
{
b->next_bio = next;
}
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void
BIO_free_all(BIO *bio)
{
BIO *b;
int ref;
while (bio != NULL) {
b = bio;
ref = b->references;
bio = bio->next_bio;
BIO_free(b);
/* Since ref count > 1, don't free anyone else. */
if (ref > 1)
break;
}
}
BIO *
BIO_dup_chain(BIO *in)
{
BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
for (bio = in; bio != NULL; bio = bio->next_bio) {
if ((new_bio = BIO_new(bio->method)) == NULL)
goto err;
new_bio->callback = bio->callback;
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new_bio->callback_ex = bio->callback_ex;
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new_bio->cb_arg = bio->cb_arg;
new_bio->init = bio->init;
new_bio->shutdown = bio->shutdown;
new_bio->flags = bio->flags;
/* This will let SSL_s_sock() work with stdin/stdout */
new_bio->num = bio->num;
if (!BIO_dup_state(bio, (char *)new_bio)) {
BIO_free(new_bio);
goto err;
}
/* copy app data */
if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO,
&new_bio->ex_data, &bio->ex_data))
goto err;
if (ret == NULL) {
eoc = new_bio;
ret = eoc;
} else {
BIO_push(eoc, new_bio);
eoc = new_bio;
}
}
return (ret);
err:
BIO_free(ret);
return (NULL);
}
void
BIO_copy_next_retry(BIO *b)
{
BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
b->retry_reason = b->next_bio->retry_reason;
}
int
BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
{
return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
new_func, dup_func, free_func);
}
int
BIO_set_ex_data(BIO *bio, int idx, void *data)
{
return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
}
void *
BIO_get_ex_data(BIO *bio, int idx)
{
return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
}
unsigned long
BIO_number_read(BIO *bio)
{
if (bio)
return bio->num_read;
return 0;
}
unsigned long
BIO_number_written(BIO *bio)
{
if (bio)
return bio->num_write;
return 0;
}