Deleting OpenSSL module and library

1 files changed, 0 insertions, 889 deletions

diff --git a/thirdparty/openssl/crypto/bio/bss_bio.c b/thirdparty/openssl/crypto/bio/bss_bio.c
deleted file mode 100644
index 3dd8187729..0000000000
--- a/thirdparty/openssl/crypto/bio/bss_bio.c
+++ /dev/null
@@ -1,889 +0,0 @@
-/* crypto/bio/bss_bio.c  */
-/* ====================================================================
- * Copyright (c) 1998-2003 The OpenSSL Project.  All rights reserved.
- *
- * 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 above 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 acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED 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 OpenSSL PROJECT OR
- * ITS 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.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-/*
- * Special method for a BIO where the other endpoint is also a BIO of this
- * kind, handled by the same thread (i.e. the "peer" is actually ourselves,
- * wearing a different hat). Such "BIO pairs" are mainly for using the SSL
- * library with I/O interfaces for which no specific BIO method is available.
- * See ssl/ssltest.c for some hints on how this can be used.
- */
-
-/* BIO_DEBUG implies BIO_PAIR_DEBUG */
-#ifdef BIO_DEBUG
-# ifndef BIO_PAIR_DEBUG
-#  define BIO_PAIR_DEBUG
-# endif
-#endif
-
-/* disable assert() unless BIO_PAIR_DEBUG has been defined */
-#ifndef BIO_PAIR_DEBUG
-# ifndef NDEBUG
-#  define NDEBUG
-# endif
-#endif
-
-#include <assert.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <openssl/bio.h>
-#include <openssl/err.h>
-#include <openssl/crypto.h>
-
-#include "e_os.h"
-
-/* VxWorks defines SSIZE_MAX with an empty value causing compile errors */
-#if defined(OPENSSL_SYS_VXWORKS)
-# undef SSIZE_MAX
-#endif
-#ifndef SSIZE_MAX
-# define SSIZE_MAX INT_MAX
-#endif
-
-static int bio_new(BIO *bio);
-static int bio_free(BIO *bio);
-static int bio_read(BIO *bio, char *buf, int size);
-static int bio_write(BIO *bio, const char *buf, int num);
-static long bio_ctrl(BIO *bio, int cmd, long num, void *ptr);
-static int bio_puts(BIO *bio, const char *str);
-
-static int bio_make_pair(BIO *bio1, BIO *bio2);
-static void bio_destroy_pair(BIO *bio);
-
-static BIO_METHOD methods_biop = {
-    BIO_TYPE_BIO,
-    "BIO pair",
-    bio_write,
-    bio_read,
-    bio_puts,
-    NULL /* no bio_gets */ ,
-    bio_ctrl,
-    bio_new,
-    bio_free,
-    NULL                        /* no bio_callback_ctrl */
-};
-
-BIO_METHOD *BIO_s_bio(void)
-{
-    return &methods_biop;
-}
-
-struct bio_bio_st {
-    BIO *peer;                  /* NULL if buf == NULL. If peer != NULL, then
-                                 * peer->ptr is also a bio_bio_st, and its
-                                 * "peer" member points back to us. peer !=
-                                 * NULL iff init != 0 in the BIO. */
-    /* This is for what we write (i.e. reading uses peer's struct): */
-    int closed;                 /* valid iff peer != NULL */
-    size_t len;                 /* valid iff buf != NULL; 0 if peer == NULL */
-    size_t offset;              /* valid iff buf != NULL; 0 if len == 0 */
-    size_t size;
-    char *buf;                  /* "size" elements (if != NULL) */
-    size_t request;             /* valid iff peer != NULL; 0 if len != 0,
-                                 * otherwise set by peer to number of bytes
-                                 * it (unsuccessfully) tried to read, never
-                                 * more than buffer space (size-len)
-                                 * warrants. */
-};
-
-static int bio_new(BIO *bio)
-{
-    struct bio_bio_st *b;
-
-    b = OPENSSL_malloc(sizeof *b);
-    if (b == NULL)
-        return 0;
-
-    b->peer = NULL;
-    b->closed = 0;
-    b->len = 0;
-    b->offset = 0;
-    /* enough for one TLS record (just a default) */
-    b->size = 17 * 1024;
-    b->buf = NULL;
-    b->request = 0;
-
-    bio->ptr = b;
-    return 1;
-}
-
-static int bio_free(BIO *bio)
-{
-    struct bio_bio_st *b;
-
-    if (bio == NULL)
-        return 0;
-    b = bio->ptr;
-
-    assert(b != NULL);
-
-    if (b->peer)
-        bio_destroy_pair(bio);
-
-    if (b->buf != NULL) {
-        OPENSSL_free(b->buf);
-    }
-
-    OPENSSL_free(b);
-
-    return 1;
-}
-
-static int bio_read(BIO *bio, char *buf, int size_)
-{
-    size_t size = size_;
-    size_t rest;
-    struct bio_bio_st *b, *peer_b;
-
-    BIO_clear_retry_flags(bio);
-
-    if (!bio->init)
-        return 0;
-
-    b = bio->ptr;
-    assert(b != NULL);
-    assert(b->peer != NULL);
-    peer_b = b->peer->ptr;
-    assert(peer_b != NULL);
-    assert(peer_b->buf != NULL);
-
-    peer_b->request = 0;        /* will be set in "retry_read" situation */
-
-    if (buf == NULL || size == 0)
-        return 0;
-
-    if (peer_b->len == 0) {
-        if (peer_b->closed)
-            return 0;           /* writer has closed, and no data is left */
-        else {
-            BIO_set_retry_read(bio); /* buffer is empty */
-            if (size <= peer_b->size)
-                peer_b->request = size;
-            else
-                /*
-                 * don't ask for more than the peer can deliver in one write
-                 */
-                peer_b->request = peer_b->size;
-            return -1;
-        }
-    }
-
-    /* we can read */
-    if (peer_b->len < size)
-        size = peer_b->len;
-
-    /* now read "size" bytes */
-
-    rest = size;
-
-    assert(rest > 0);
-    do {                        /* one or two iterations */
-        size_t chunk;
-
-        assert(rest <= peer_b->len);
-        if (peer_b->offset + rest <= peer_b->size)
-            chunk = rest;
-        else
-            /* wrap around ring buffer */
-            chunk = peer_b->size - peer_b->offset;
-        assert(peer_b->offset + chunk <= peer_b->size);
-
-        memcpy(buf, peer_b->buf + peer_b->offset, chunk);
-
-        peer_b->len -= chunk;
-        if (peer_b->len) {
-            peer_b->offset += chunk;
-            assert(peer_b->offset <= peer_b->size);
-            if (peer_b->offset == peer_b->size)
-                peer_b->offset = 0;
-            buf += chunk;
-        } else {
-            /* buffer now empty, no need to advance "buf" */
-            assert(chunk == rest);
-            peer_b->offset = 0;
-        }
-        rest -= chunk;
-    }
-    while (rest);
-
-    return size;
-}
-
-/*-
- * non-copying interface: provide pointer to available data in buffer
- *    bio_nread0:  return number of available bytes
- *    bio_nread:   also advance index
- * (example usage:  bio_nread0(), read from buffer, bio_nread()
- *  or just         bio_nread(), read from buffer)
- */
-/*
- * WARNING: The non-copying interface is largely untested as of yet and may
- * contain bugs.
- */
-static ossl_ssize_t bio_nread0(BIO *bio, char **buf)
-{
-    struct bio_bio_st *b, *peer_b;
-    ossl_ssize_t num;
-
-    BIO_clear_retry_flags(bio);
-
-    if (!bio->init)
-        return 0;
-
-    b = bio->ptr;
-    assert(b != NULL);
-    assert(b->peer != NULL);
-    peer_b = b->peer->ptr;
-    assert(peer_b != NULL);
-    assert(peer_b->buf != NULL);
-
-    peer_b->request = 0;
-
-    if (peer_b->len == 0) {
-        char dummy;
-
-        /* avoid code duplication -- nothing available for reading */
-        return bio_read(bio, &dummy, 1); /* returns 0 or -1 */
-    }
-
-    num = peer_b->len;
-    if (peer_b->size < peer_b->offset + num)
-        /* no ring buffer wrap-around for non-copying interface */
-        num = peer_b->size - peer_b->offset;
-    assert(num > 0);
-
-    if (buf != NULL)
-        *buf = peer_b->buf + peer_b->offset;
-    return num;
-}
-
-static ossl_ssize_t bio_nread(BIO *bio, char **buf, size_t num_)
-{
-    struct bio_bio_st *b, *peer_b;
-    ossl_ssize_t num, available;
-
-    if (num_ > SSIZE_MAX)
-        num = SSIZE_MAX;
-    else
-        num = (ossl_ssize_t) num_;
-
-    available = bio_nread0(bio, buf);
-    if (num > available)
-        num = available;
-    if (num <= 0)
-        return num;
-
-    b = bio->ptr;
-    peer_b = b->peer->ptr;
-
-    peer_b->len -= num;
-    if (peer_b->len) {
-        peer_b->offset += num;
-        assert(peer_b->offset <= peer_b->size);
-        if (peer_b->offset == peer_b->size)
-            peer_b->offset = 0;
-    } else
-        peer_b->offset = 0;
-
-    return num;
-}
-
-static int bio_write(BIO *bio, const char *buf, int num_)
-{
-    size_t num = num_;
-    size_t rest;
-    struct bio_bio_st *b;
-
-    BIO_clear_retry_flags(bio);
-
-    if (!bio->init || buf == NULL || num == 0)
-        return 0;
-
-    b = bio->ptr;
-    assert(b != NULL);
-    assert(b->peer != NULL);
-    assert(b->buf != NULL);
-
-    b->request = 0;
-    if (b->closed) {
-        /* we already closed */
-        BIOerr(BIO_F_BIO_WRITE, BIO_R_BROKEN_PIPE);
-        return -1;
-    }
-
-    assert(b->len <= b->size);
-
-    if (b->len == b->size) {
-        BIO_set_retry_write(bio); /* buffer is full */
-        return -1;
-    }
-
-    /* we can write */
-    if (num > b->size - b->len)
-        num = b->size - b->len;
-
-    /* now write "num" bytes */
-
-    rest = num;
-
-    assert(rest > 0);
-    do {                        /* one or two iterations */
-        size_t write_offset;
-        size_t chunk;
-
-        assert(b->len + rest <= b->size);
-
-        write_offset = b->offset + b->len;
-        if (write_offset >= b->size)
-            write_offset -= b->size;
-        /* b->buf[write_offset] is the first byte we can write to. */
-
-        if (write_offset + rest <= b->size)
-            chunk = rest;
-        else
-            /* wrap around ring buffer */
-            chunk = b->size - write_offset;
-
-        memcpy(b->buf + write_offset, buf, chunk);
-
-        b->len += chunk;
-
-        assert(b->len <= b->size);
-
-        rest -= chunk;
-        buf += chunk;
-    }
-    while (rest);
-
-    return num;
-}
-
-/*-
- * non-copying interface: provide pointer to region to write to
- *   bio_nwrite0:  check how much space is available
- *   bio_nwrite:   also increase length
- * (example usage:  bio_nwrite0(), write to buffer, bio_nwrite()
- *  or just         bio_nwrite(), write to buffer)
- */
-static ossl_ssize_t bio_nwrite0(BIO *bio, char **buf)
-{
-    struct bio_bio_st *b;
-    size_t num;
-    size_t write_offset;
-
-    BIO_clear_retry_flags(bio);
-
-    if (!bio->init)
-        return 0;
-
-    b = bio->ptr;
-    assert(b != NULL);
-    assert(b->peer != NULL);
-    assert(b->buf != NULL);
-
-    b->request = 0;
-    if (b->closed) {
-        BIOerr(BIO_F_BIO_NWRITE0, BIO_R_BROKEN_PIPE);
-        return -1;
-    }
-
-    assert(b->len <= b->size);
-
-    if (b->len == b->size) {
-        BIO_set_retry_write(bio);
-        return -1;
-    }
-
-    num = b->size - b->len;
-    write_offset = b->offset + b->len;
-    if (write_offset >= b->size)
-        write_offset -= b->size;
-    if (write_offset + num > b->size)
-        /*
-         * no ring buffer wrap-around for non-copying interface (to fulfil
-         * the promise by BIO_ctrl_get_write_guarantee, BIO_nwrite may have
-         * to be called twice)
-         */
-        num = b->size - write_offset;
-
-    if (buf != NULL)
-        *buf = b->buf + write_offset;
-    assert(write_offset + num <= b->size);
-
-    return num;
-}
-
-static ossl_ssize_t bio_nwrite(BIO *bio, char **buf, size_t num_)
-{
-    struct bio_bio_st *b;
-    ossl_ssize_t num, space;
-
-    if (num_ > SSIZE_MAX)
-        num = SSIZE_MAX;
-    else
-        num = (ossl_ssize_t) num_;
-
-    space = bio_nwrite0(bio, buf);
-    if (num > space)
-        num = space;
-    if (num <= 0)
-        return num;
-    b = bio->ptr;
-    assert(b != NULL);
-    b->len += num;
-    assert(b->len <= b->size);
-
-    return num;
-}
-
-static long bio_ctrl(BIO *bio, int cmd, long num, void *ptr)
-{
-    long ret;
-    struct bio_bio_st *b = bio->ptr;
-
-    assert(b != NULL);
-
-    switch (cmd) {
-        /* specific CTRL codes */
-
-    case BIO_C_SET_WRITE_BUF_SIZE:
-        if (b->peer) {
-            BIOerr(BIO_F_BIO_CTRL, BIO_R_IN_USE);
-            ret = 0;
-        } else if (num == 0) {
-            BIOerr(BIO_F_BIO_CTRL, BIO_R_INVALID_ARGUMENT);
-            ret = 0;
-        } else {
-            size_t new_size = num;
-
-            if (b->size != new_size) {
-                if (b->buf) {
-                    OPENSSL_free(b->buf);
-                    b->buf = NULL;
-                }
-                b->size = new_size;
-            }
-            ret = 1;
-        }
-        break;
-
-    case BIO_C_GET_WRITE_BUF_SIZE:
-        ret = (long)b->size;
-        break;
-
-    case BIO_C_MAKE_BIO_PAIR:
-        {
-            BIO *other_bio = ptr;
-
-            if (bio_make_pair(bio, other_bio))
-                ret = 1;
-            else
-                ret = 0;
-        }
-        break;
-
-    case BIO_C_DESTROY_BIO_PAIR:
-        /*
-         * Affects both BIOs in the pair -- call just once! Or let
-         * BIO_free(bio1); BIO_free(bio2); do the job.
-         */
-        bio_destroy_pair(bio);
-        ret = 1;
-        break;
-
-    case BIO_C_GET_WRITE_GUARANTEE:
-        /*
-         * How many bytes can the caller feed to the next write without
-         * having to keep any?
-         */
-        if (b->peer == NULL || b->closed)
-            ret = 0;
-        else
-            ret = (long)b->size - b->len;
-        break;
-
-    case BIO_C_GET_READ_REQUEST:
-        /*
-         * If the peer unsuccessfully tried to read, how many bytes were
-         * requested? (As with BIO_CTRL_PENDING, that number can usually be
-         * treated as boolean.)
-         */
-        ret = (long)b->request;
-        break;
-
-    case BIO_C_RESET_READ_REQUEST:
-        /*
-         * Reset request.  (Can be useful after read attempts at the other
-         * side that are meant to be non-blocking, e.g. when probing SSL_read
-         * to see if any data is available.)
-         */
-        b->request = 0;
-        ret = 1;
-        break;
-
-    case BIO_C_SHUTDOWN_WR:
-        /* similar to shutdown(..., SHUT_WR) */
-        b->closed = 1;
-        ret = 1;
-        break;
-
-    case BIO_C_NREAD0:
-        /* prepare for non-copying read */
-        ret = (long)bio_nread0(bio, ptr);
-        break;
-
-    case BIO_C_NREAD:
-        /* non-copying read */
-        ret = (long)bio_nread(bio, ptr, (size_t)num);
-        break;
-
-    case BIO_C_NWRITE0:
-        /* prepare for non-copying write */
-        ret = (long)bio_nwrite0(bio, ptr);
-        break;
-
-    case BIO_C_NWRITE:
-        /* non-copying write */
-        ret = (long)bio_nwrite(bio, ptr, (size_t)num);
-        break;
-
-        /* standard CTRL codes follow */
-
-    case BIO_CTRL_RESET:
-        if (b->buf != NULL) {
-            b->len = 0;
-            b->offset = 0;
-        }
-        ret = 0;
-        break;
-
-    case BIO_CTRL_GET_CLOSE:
-        ret = bio->shutdown;
-        break;
-
-    case BIO_CTRL_SET_CLOSE:
-        bio->shutdown = (int)num;
-        ret = 1;
-        break;
-
-    case BIO_CTRL_PENDING:
-        if (b->peer != NULL) {
-            struct bio_bio_st *peer_b = b->peer->ptr;
-
-            ret = (long)peer_b->len;
-        } else
-            ret = 0;
-        break;
-
-    case BIO_CTRL_WPENDING:
-        if (b->buf != NULL)
-            ret = (long)b->len;
-        else
-            ret = 0;
-        break;
-
-    case BIO_CTRL_DUP:
-        /* See BIO_dup_chain for circumstances we have to expect. */
-        {
-            BIO *other_bio = ptr;
-            struct bio_bio_st *other_b;
-
-            assert(other_bio != NULL);
-            other_b = other_bio->ptr;
-            assert(other_b != NULL);
-
-            assert(other_b->buf == NULL); /* other_bio is always fresh */
-
-            other_b->size = b->size;
-        }
-
-        ret = 1;
-        break;
-
-    case BIO_CTRL_FLUSH:
-        ret = 1;
-        break;
-
-    case BIO_CTRL_EOF:
-        if (b->peer != NULL) {
-            struct bio_bio_st *peer_b = b->peer->ptr;
-
-            if (peer_b->len == 0 && peer_b->closed)
-                ret = 1;
-            else
-                ret = 0;
-        } else {
-            ret = 1;
-        }
-        break;
-
-    default:
-        ret = 0;
-    }
-    return ret;
-}
-
-static int bio_puts(BIO *bio, const char *str)
-{
-    return bio_write(bio, str, strlen(str));
-}
-
-static int bio_make_pair(BIO *bio1, BIO *bio2)
-{
-    struct bio_bio_st *b1, *b2;
-
-    assert(bio1 != NULL);
-    assert(bio2 != NULL);
-
-    b1 = bio1->ptr;
-    b2 = bio2->ptr;
-
-    if (b1->peer != NULL || b2->peer != NULL) {
-        BIOerr(BIO_F_BIO_MAKE_PAIR, BIO_R_IN_USE);
-        return 0;
-    }
-
-    if (b1->buf == NULL) {
-        b1->buf = OPENSSL_malloc(b1->size);
-        if (b1->buf == NULL) {
-            BIOerr(BIO_F_BIO_MAKE_PAIR, ERR_R_MALLOC_FAILURE);
-            return 0;
-        }
-        b1->len = 0;
-        b1->offset = 0;
-    }
-
-    if (b2->buf == NULL) {
-        b2->buf = OPENSSL_malloc(b2->size);
-        if (b2->buf == NULL) {
-            BIOerr(BIO_F_BIO_MAKE_PAIR, ERR_R_MALLOC_FAILURE);
-            return 0;
-        }
-        b2->len = 0;
-        b2->offset = 0;
-    }
-
-    b1->peer = bio2;
-    b1->closed = 0;
-    b1->request = 0;
-    b2->peer = bio1;
-    b2->closed = 0;
-    b2->request = 0;
-
-    bio1->init = 1;
-    bio2->init = 1;
-
-    return 1;
-}
-
-static void bio_destroy_pair(BIO *bio)
-{
-    struct bio_bio_st *b = bio->ptr;
-
-    if (b != NULL) {
-        BIO *peer_bio = b->peer;
-
-        if (peer_bio != NULL) {
-            struct bio_bio_st *peer_b = peer_bio->ptr;
-
-            assert(peer_b != NULL);
-            assert(peer_b->peer == bio);
-
-            peer_b->peer = NULL;
-            peer_bio->init = 0;
-            assert(peer_b->buf != NULL);
-            peer_b->len = 0;
-            peer_b->offset = 0;
-
-            b->peer = NULL;
-            bio->init = 0;
-            assert(b->buf != NULL);
-            b->len = 0;
-            b->offset = 0;
-        }
-    }
-}
-
-/* Exported convenience functions */
-int BIO_new_bio_pair(BIO **bio1_p, size_t writebuf1,
-                     BIO **bio2_p, size_t writebuf2)
-{
-    BIO *bio1 = NULL, *bio2 = NULL;
-    long r;
-    int ret = 0;
-
-    bio1 = BIO_new(BIO_s_bio());
-    if (bio1 == NULL)
-        goto err;
-    bio2 = BIO_new(BIO_s_bio());
-    if (bio2 == NULL)
-        goto err;
-
-    if (writebuf1) {
-        r = BIO_set_write_buf_size(bio1, writebuf1);
-        if (!r)
-            goto err;
-    }
-    if (writebuf2) {
-        r = BIO_set_write_buf_size(bio2, writebuf2);
-        if (!r)
-            goto err;
-    }
-
-    r = BIO_make_bio_pair(bio1, bio2);
-    if (!r)
-        goto err;
-    ret = 1;
-
- err:
-    if (ret == 0) {
-        if (bio1) {
-            BIO_free(bio1);
-            bio1 = NULL;
-        }
-        if (bio2) {
-            BIO_free(bio2);
-            bio2 = NULL;
-        }
-    }
-
-    *bio1_p = bio1;
-    *bio2_p = bio2;
-    return ret;
-}
-
-size_t BIO_ctrl_get_write_guarantee(BIO *bio)
-{
-    return BIO_ctrl(bio, BIO_C_GET_WRITE_GUARANTEE, 0, NULL);
-}
-
-size_t BIO_ctrl_get_read_request(BIO *bio)
-{
-    return BIO_ctrl(bio, BIO_C_GET_READ_REQUEST, 0, NULL);
-}
-
-int BIO_ctrl_reset_read_request(BIO *bio)
-{
-    return (BIO_ctrl(bio, BIO_C_RESET_READ_REQUEST, 0, NULL) != 0);
-}
-
-/*
- * BIO_nread0/nread/nwrite0/nwrite are available only for BIO pairs for now
- * (conceivably some other BIOs could allow non-copying reads and writes
- * too.)
- */
-int BIO_nread0(BIO *bio, char **buf)
-{
-    long ret;
-
-    if (!bio->init) {
-        BIOerr(BIO_F_BIO_NREAD0, BIO_R_UNINITIALIZED);
-        return -2;
-    }
-
-    ret = BIO_ctrl(bio, BIO_C_NREAD0, 0, buf);
-    if (ret > INT_MAX)
-        return INT_MAX;
-    else
-        return (int)ret;
-}
-
-int BIO_nread(BIO *bio, char **buf, int num)
-{
-    int ret;
-
-    if (!bio->init) {
-        BIOerr(BIO_F_BIO_NREAD, BIO_R_UNINITIALIZED);
-        return -2;
-    }
-
-    ret = (int)BIO_ctrl(bio, BIO_C_NREAD, num, buf);
-    if (ret > 0)
-        bio->num_read += ret;
-    return ret;
-}
-
-int BIO_nwrite0(BIO *bio, char **buf)
-{
-    long ret;
-
-    if (!bio->init) {
-        BIOerr(BIO_F_BIO_NWRITE0, BIO_R_UNINITIALIZED);
-        return -2;
-    }
-
-    ret = BIO_ctrl(bio, BIO_C_NWRITE0, 0, buf);
-    if (ret > INT_MAX)
-        return INT_MAX;
-    else
-        return (int)ret;
-}
-
-int BIO_nwrite(BIO *bio, char **buf, int num)
-{
-    int ret;
-
-    if (!bio->init) {
-        BIOerr(BIO_F_BIO_NWRITE, BIO_R_UNINITIALIZED);
-        return -2;
-    }
-
-    ret = BIO_ctrl(bio, BIO_C_NWRITE, num, buf);
-    if (ret > 0)
-        bio->num_write += ret;
-    return ret;
-}