507 lines
13 KiB
C
507 lines
13 KiB
C
/*
|
|
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <openssl/crypto.h>
|
|
#include "internal/bio.h"
|
|
#include <openssl/err.h>
|
|
#include "ssl_local.h"
|
|
|
|
static int ssl_write(BIO *h, const char *buf, size_t size, size_t *written);
|
|
static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes);
|
|
static int ssl_puts(BIO *h, const char *str);
|
|
static long ssl_ctrl(BIO *h, int cmd, long arg1, void *arg2);
|
|
static int ssl_new(BIO *h);
|
|
static int ssl_free(BIO *data);
|
|
static long ssl_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
|
|
typedef struct bio_ssl_st {
|
|
SSL *ssl; /* The ssl handle :-) */
|
|
/* re-negotiate every time the total number of bytes is this size */
|
|
int num_renegotiates;
|
|
unsigned long renegotiate_count;
|
|
size_t byte_count;
|
|
unsigned long renegotiate_timeout;
|
|
unsigned long last_time;
|
|
} BIO_SSL;
|
|
|
|
static const BIO_METHOD methods_sslp = {
|
|
BIO_TYPE_SSL,
|
|
"ssl",
|
|
ssl_write,
|
|
NULL, /* ssl_write_old, */
|
|
ssl_read,
|
|
NULL, /* ssl_read_old, */
|
|
ssl_puts,
|
|
NULL, /* ssl_gets, */
|
|
ssl_ctrl,
|
|
ssl_new,
|
|
ssl_free,
|
|
ssl_callback_ctrl,
|
|
};
|
|
|
|
const BIO_METHOD *BIO_f_ssl(void)
|
|
{
|
|
return &methods_sslp;
|
|
}
|
|
|
|
static int ssl_new(BIO *bi)
|
|
{
|
|
BIO_SSL *bs = OPENSSL_zalloc(sizeof(*bs));
|
|
|
|
if (bs == NULL) {
|
|
BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
BIO_set_init(bi, 0);
|
|
BIO_set_data(bi, bs);
|
|
/* Clear all flags */
|
|
BIO_clear_flags(bi, ~0);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int ssl_free(BIO *a)
|
|
{
|
|
BIO_SSL *bs;
|
|
|
|
if (a == NULL)
|
|
return 0;
|
|
bs = BIO_get_data(a);
|
|
if (BIO_get_shutdown(a)) {
|
|
if (bs->ssl != NULL)
|
|
SSL_shutdown(bs->ssl);
|
|
if (BIO_get_init(a))
|
|
SSL_free(bs->ssl);
|
|
BIO_clear_flags(a, ~0); /* Clear all flags */
|
|
BIO_set_init(a, 0);
|
|
}
|
|
OPENSSL_free(bs);
|
|
return 1;
|
|
}
|
|
|
|
static int ssl_read(BIO *b, char *buf, size_t size, size_t *readbytes)
|
|
{
|
|
int ret = 1;
|
|
BIO_SSL *sb;
|
|
SSL *ssl;
|
|
int retry_reason = 0;
|
|
int r = 0;
|
|
|
|
if (buf == NULL)
|
|
return 0;
|
|
sb = BIO_get_data(b);
|
|
ssl = sb->ssl;
|
|
|
|
BIO_clear_retry_flags(b);
|
|
|
|
ret = ssl_read_internal(ssl, buf, size, readbytes);
|
|
|
|
switch (SSL_get_error(ssl, ret)) {
|
|
case SSL_ERROR_NONE:
|
|
if (sb->renegotiate_count > 0) {
|
|
sb->byte_count += *readbytes;
|
|
if (sb->byte_count > sb->renegotiate_count) {
|
|
sb->byte_count = 0;
|
|
sb->num_renegotiates++;
|
|
SSL_renegotiate(ssl);
|
|
r = 1;
|
|
}
|
|
}
|
|
if ((sb->renegotiate_timeout > 0) && (!r)) {
|
|
unsigned long tm;
|
|
|
|
tm = (unsigned long)time(NULL);
|
|
if (tm > sb->last_time + sb->renegotiate_timeout) {
|
|
sb->last_time = tm;
|
|
sb->num_renegotiates++;
|
|
SSL_renegotiate(ssl);
|
|
}
|
|
}
|
|
|
|
break;
|
|
case SSL_ERROR_WANT_READ:
|
|
BIO_set_retry_read(b);
|
|
break;
|
|
case SSL_ERROR_WANT_WRITE:
|
|
BIO_set_retry_write(b);
|
|
break;
|
|
case SSL_ERROR_WANT_X509_LOOKUP:
|
|
BIO_set_retry_special(b);
|
|
retry_reason = BIO_RR_SSL_X509_LOOKUP;
|
|
break;
|
|
case SSL_ERROR_WANT_ACCEPT:
|
|
BIO_set_retry_special(b);
|
|
retry_reason = BIO_RR_ACCEPT;
|
|
break;
|
|
case SSL_ERROR_WANT_CONNECT:
|
|
BIO_set_retry_special(b);
|
|
retry_reason = BIO_RR_CONNECT;
|
|
break;
|
|
case SSL_ERROR_SYSCALL:
|
|
case SSL_ERROR_SSL:
|
|
case SSL_ERROR_ZERO_RETURN:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
BIO_set_retry_reason(b, retry_reason);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ssl_write(BIO *b, const char *buf, size_t size, size_t *written)
|
|
{
|
|
int ret, r = 0;
|
|
int retry_reason = 0;
|
|
SSL *ssl;
|
|
BIO_SSL *bs;
|
|
|
|
if (buf == NULL)
|
|
return 0;
|
|
bs = BIO_get_data(b);
|
|
ssl = bs->ssl;
|
|
|
|
BIO_clear_retry_flags(b);
|
|
|
|
ret = ssl_write_internal(ssl, buf, size, written);
|
|
|
|
switch (SSL_get_error(ssl, ret)) {
|
|
case SSL_ERROR_NONE:
|
|
if (bs->renegotiate_count > 0) {
|
|
bs->byte_count += *written;
|
|
if (bs->byte_count > bs->renegotiate_count) {
|
|
bs->byte_count = 0;
|
|
bs->num_renegotiates++;
|
|
SSL_renegotiate(ssl);
|
|
r = 1;
|
|
}
|
|
}
|
|
if ((bs->renegotiate_timeout > 0) && (!r)) {
|
|
unsigned long tm;
|
|
|
|
tm = (unsigned long)time(NULL);
|
|
if (tm > bs->last_time + bs->renegotiate_timeout) {
|
|
bs->last_time = tm;
|
|
bs->num_renegotiates++;
|
|
SSL_renegotiate(ssl);
|
|
}
|
|
}
|
|
break;
|
|
case SSL_ERROR_WANT_WRITE:
|
|
BIO_set_retry_write(b);
|
|
break;
|
|
case SSL_ERROR_WANT_READ:
|
|
BIO_set_retry_read(b);
|
|
break;
|
|
case SSL_ERROR_WANT_X509_LOOKUP:
|
|
BIO_set_retry_special(b);
|
|
retry_reason = BIO_RR_SSL_X509_LOOKUP;
|
|
break;
|
|
case SSL_ERROR_WANT_CONNECT:
|
|
BIO_set_retry_special(b);
|
|
retry_reason = BIO_RR_CONNECT;
|
|
case SSL_ERROR_SYSCALL:
|
|
case SSL_ERROR_SSL:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
BIO_set_retry_reason(b, retry_reason);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
|
|
{
|
|
SSL **sslp, *ssl;
|
|
BIO_SSL *bs, *dbs;
|
|
BIO *dbio, *bio;
|
|
long ret = 1;
|
|
BIO *next;
|
|
|
|
bs = BIO_get_data(b);
|
|
next = BIO_next(b);
|
|
ssl = bs->ssl;
|
|
if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
|
|
return 0;
|
|
switch (cmd) {
|
|
case BIO_CTRL_RESET:
|
|
SSL_shutdown(ssl);
|
|
|
|
if (ssl->handshake_func == ssl->method->ssl_connect)
|
|
SSL_set_connect_state(ssl);
|
|
else if (ssl->handshake_func == ssl->method->ssl_accept)
|
|
SSL_set_accept_state(ssl);
|
|
|
|
if (!SSL_clear(ssl)) {
|
|
ret = 0;
|
|
break;
|
|
}
|
|
|
|
if (next != NULL)
|
|
ret = BIO_ctrl(next, cmd, num, ptr);
|
|
else if (ssl->rbio != NULL)
|
|
ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
|
|
else
|
|
ret = 1;
|
|
break;
|
|
case BIO_CTRL_INFO:
|
|
ret = 0;
|
|
break;
|
|
case BIO_C_SSL_MODE:
|
|
if (num) /* client mode */
|
|
SSL_set_connect_state(ssl);
|
|
else
|
|
SSL_set_accept_state(ssl);
|
|
break;
|
|
case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
|
|
ret = bs->renegotiate_timeout;
|
|
if (num < 60)
|
|
num = 5;
|
|
bs->renegotiate_timeout = (unsigned long)num;
|
|
bs->last_time = (unsigned long)time(NULL);
|
|
break;
|
|
case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
|
|
ret = bs->renegotiate_count;
|
|
if ((long)num >= 512)
|
|
bs->renegotiate_count = (unsigned long)num;
|
|
break;
|
|
case BIO_C_GET_SSL_NUM_RENEGOTIATES:
|
|
ret = bs->num_renegotiates;
|
|
break;
|
|
case BIO_C_SET_SSL:
|
|
if (ssl != NULL) {
|
|
ssl_free(b);
|
|
if (!ssl_new(b))
|
|
return 0;
|
|
bs = BIO_get_data(b);
|
|
}
|
|
BIO_set_shutdown(b, num);
|
|
ssl = (SSL *)ptr;
|
|
bs->ssl = ssl;
|
|
bio = SSL_get_rbio(ssl);
|
|
if (bio != NULL) {
|
|
if (next != NULL)
|
|
BIO_push(bio, next);
|
|
BIO_set_next(b, bio);
|
|
BIO_up_ref(bio);
|
|
}
|
|
BIO_set_init(b, 1);
|
|
break;
|
|
case BIO_C_GET_SSL:
|
|
if (ptr != NULL) {
|
|
sslp = (SSL **)ptr;
|
|
*sslp = ssl;
|
|
} else
|
|
ret = 0;
|
|
break;
|
|
case BIO_CTRL_GET_CLOSE:
|
|
ret = BIO_get_shutdown(b);
|
|
break;
|
|
case BIO_CTRL_SET_CLOSE:
|
|
BIO_set_shutdown(b, (int)num);
|
|
break;
|
|
case BIO_CTRL_WPENDING:
|
|
ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
|
|
break;
|
|
case BIO_CTRL_PENDING:
|
|
ret = SSL_pending(ssl);
|
|
if (ret == 0)
|
|
ret = BIO_pending(ssl->rbio);
|
|
break;
|
|
case BIO_CTRL_FLUSH:
|
|
BIO_clear_retry_flags(b);
|
|
ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
|
|
BIO_copy_next_retry(b);
|
|
break;
|
|
case BIO_CTRL_PUSH:
|
|
if ((next != NULL) && (next != ssl->rbio)) {
|
|
/*
|
|
* We are going to pass ownership of next to the SSL object...but
|
|
* we don't own a reference to pass yet - so up ref
|
|
*/
|
|
BIO_up_ref(next);
|
|
SSL_set_bio(ssl, next, next);
|
|
}
|
|
break;
|
|
case BIO_CTRL_POP:
|
|
/* Only detach if we are the BIO explicitly being popped */
|
|
if (b == ptr) {
|
|
/* This will clear the reference we obtained during push */
|
|
SSL_set_bio(ssl, NULL, NULL);
|
|
}
|
|
break;
|
|
case BIO_C_DO_STATE_MACHINE:
|
|
BIO_clear_retry_flags(b);
|
|
|
|
BIO_set_retry_reason(b, 0);
|
|
ret = (int)SSL_do_handshake(ssl);
|
|
|
|
switch (SSL_get_error(ssl, (int)ret)) {
|
|
case SSL_ERROR_WANT_READ:
|
|
BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
|
|
break;
|
|
case SSL_ERROR_WANT_WRITE:
|
|
BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
|
|
break;
|
|
case SSL_ERROR_WANT_CONNECT:
|
|
BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
|
|
BIO_set_retry_reason(b, BIO_get_retry_reason(next));
|
|
break;
|
|
case SSL_ERROR_WANT_X509_LOOKUP:
|
|
BIO_set_retry_special(b);
|
|
BIO_set_retry_reason(b, BIO_RR_SSL_X509_LOOKUP);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case BIO_CTRL_DUP:
|
|
dbio = (BIO *)ptr;
|
|
dbs = BIO_get_data(dbio);
|
|
SSL_free(dbs->ssl);
|
|
dbs->ssl = SSL_dup(ssl);
|
|
dbs->num_renegotiates = bs->num_renegotiates;
|
|
dbs->renegotiate_count = bs->renegotiate_count;
|
|
dbs->byte_count = bs->byte_count;
|
|
dbs->renegotiate_timeout = bs->renegotiate_timeout;
|
|
dbs->last_time = bs->last_time;
|
|
ret = (dbs->ssl != NULL);
|
|
break;
|
|
case BIO_C_GET_FD:
|
|
ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
|
|
break;
|
|
case BIO_CTRL_SET_CALLBACK:
|
|
ret = 0; /* use callback ctrl */
|
|
break;
|
|
default:
|
|
ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static long ssl_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
|
|
{
|
|
SSL *ssl;
|
|
BIO_SSL *bs;
|
|
long ret = 1;
|
|
|
|
bs = BIO_get_data(b);
|
|
ssl = bs->ssl;
|
|
switch (cmd) {
|
|
case BIO_CTRL_SET_CALLBACK:
|
|
ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
|
|
break;
|
|
default:
|
|
ret = 0;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int ssl_puts(BIO *bp, const char *str)
|
|
{
|
|
int n, ret;
|
|
|
|
n = strlen(str);
|
|
ret = BIO_write(bp, str, n);
|
|
return ret;
|
|
}
|
|
|
|
BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
|
|
{
|
|
#ifndef OPENSSL_NO_SOCK
|
|
BIO *ret = NULL, *buf = NULL, *ssl = NULL;
|
|
|
|
if ((buf = BIO_new(BIO_f_buffer())) == NULL)
|
|
return NULL;
|
|
if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
|
|
goto err;
|
|
if ((ret = BIO_push(buf, ssl)) == NULL)
|
|
goto err;
|
|
return ret;
|
|
err:
|
|
BIO_free(buf);
|
|
BIO_free(ssl);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
|
|
{
|
|
#ifndef OPENSSL_NO_SOCK
|
|
BIO *ret = NULL, *con = NULL, *ssl = NULL;
|
|
|
|
if ((con = BIO_new(BIO_s_connect())) == NULL)
|
|
return NULL;
|
|
if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
|
|
goto err;
|
|
if ((ret = BIO_push(ssl, con)) == NULL)
|
|
goto err;
|
|
return ret;
|
|
err:
|
|
BIO_free(ssl);
|
|
BIO_free(con);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
|
|
{
|
|
BIO *ret;
|
|
SSL *ssl;
|
|
|
|
if ((ret = BIO_new(BIO_f_ssl())) == NULL)
|
|
return NULL;
|
|
if ((ssl = SSL_new(ctx)) == NULL) {
|
|
BIO_free(ret);
|
|
return NULL;
|
|
}
|
|
if (client)
|
|
SSL_set_connect_state(ssl);
|
|
else
|
|
SSL_set_accept_state(ssl);
|
|
|
|
BIO_set_ssl(ret, ssl, BIO_CLOSE);
|
|
return ret;
|
|
}
|
|
|
|
int BIO_ssl_copy_session_id(BIO *t, BIO *f)
|
|
{
|
|
BIO_SSL *tdata, *fdata;
|
|
t = BIO_find_type(t, BIO_TYPE_SSL);
|
|
f = BIO_find_type(f, BIO_TYPE_SSL);
|
|
if ((t == NULL) || (f == NULL))
|
|
return 0;
|
|
tdata = BIO_get_data(t);
|
|
fdata = BIO_get_data(f);
|
|
if ((tdata->ssl == NULL) || (fdata->ssl == NULL))
|
|
return 0;
|
|
if (!SSL_copy_session_id(tdata->ssl, (fdata->ssl)))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
void BIO_ssl_shutdown(BIO *b)
|
|
{
|
|
BIO_SSL *bdata;
|
|
|
|
for (; b != NULL; b = BIO_next(b)) {
|
|
if (BIO_method_type(b) != BIO_TYPE_SSL)
|
|
continue;
|
|
bdata = BIO_get_data(b);
|
|
if (bdata != NULL && bdata->ssl != NULL)
|
|
SSL_shutdown(bdata->ssl);
|
|
}
|
|
}
|