diff options
Diffstat (limited to 'thirdparty/openssl/crypto/bio/bss_bio.c')
| -rw-r--r-- | thirdparty/openssl/crypto/bio/bss_bio.c | 889 |
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; -} |