/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#ifndef OPENSSL_HEADER_BIO_H
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#define OPENSSL_HEADER_BIO_H
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#include <openssl/base.h>
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#include <stdio.h> // For FILE
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#include <openssl/buffer.h>
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#include <openssl/err.h> // for ERR_print_errors_fp
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#include <openssl/ex_data.h>
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#include <openssl/stack.h>
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#include <openssl/thread.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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// BIO abstracts over a file-descriptor like interface.
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// Allocation and freeing.
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DEFINE_STACK_OF(BIO)
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// BIO_new creates a new BIO with the given method and a reference count of one.
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// It returns the fresh |BIO|, or NULL on error.
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OPENSSL_EXPORT BIO *BIO_new(const BIO_METHOD *method);
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// BIO_free decrements the reference count of |bio|. If the reference count
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// drops to zero, it calls the destroy callback, if present, on the method and
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// frees |bio| itself. It then repeats that for the next BIO in the chain, if
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// any.
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//
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// It returns one on success or zero otherwise.
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OPENSSL_EXPORT int BIO_free(BIO *bio);
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// BIO_vfree performs the same actions as |BIO_free|, but has a void return
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// value. This is provided for API-compat.
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//
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// TODO(fork): remove.
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OPENSSL_EXPORT void BIO_vfree(BIO *bio);
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// BIO_up_ref increments the reference count of |bio| and returns one.
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OPENSSL_EXPORT int BIO_up_ref(BIO *bio);
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// Basic I/O.
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// BIO_read attempts to read |len| bytes into |data|. It returns the number of
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// bytes read, zero on EOF, or a negative number on error.
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OPENSSL_EXPORT int BIO_read(BIO *bio, void *data, int len);
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// BIO_gets "reads a line" from |bio| and puts at most |size| bytes into |buf|.
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// It returns the number of bytes read or a negative number on error. The
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// phrase "reads a line" is in quotes in the previous sentence because the
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// exact operation depends on the BIO's method. For example, a digest BIO will
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// return the digest in response to a |BIO_gets| call.
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//
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// TODO(fork): audit the set of BIOs that we end up needing. If all actually
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// return a line for this call, remove the warning above.
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OPENSSL_EXPORT int BIO_gets(BIO *bio, char *buf, int size);
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// BIO_write writes |len| bytes from |data| to BIO. It returns the number of
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// bytes written or a negative number on error.
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OPENSSL_EXPORT int BIO_write(BIO *bio, const void *data, int len);
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// BIO_puts writes a NUL terminated string from |buf| to |bio|. It returns the
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// number of bytes written or a negative number on error.
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OPENSSL_EXPORT int BIO_puts(BIO *bio, const char *buf);
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// BIO_flush flushes any buffered output. It returns one on success and zero
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// otherwise.
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OPENSSL_EXPORT int BIO_flush(BIO *bio);
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// Low-level control functions.
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//
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// These are generic functions for sending control requests to a BIO. In
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// general one should use the wrapper functions like |BIO_get_close|.
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// BIO_ctrl sends the control request |cmd| to |bio|. The |cmd| argument should
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// be one of the |BIO_C_*| values.
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OPENSSL_EXPORT long BIO_ctrl(BIO *bio, int cmd, long larg, void *parg);
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// BIO_ptr_ctrl acts like |BIO_ctrl| but passes the address of a |void*|
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// pointer as |parg| and returns the value that is written to it, or NULL if
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// the control request returns <= 0.
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OPENSSL_EXPORT char *BIO_ptr_ctrl(BIO *bp, int cmd, long larg);
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// BIO_int_ctrl acts like |BIO_ctrl| but passes the address of a copy of |iarg|
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// as |parg|.
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OPENSSL_EXPORT long BIO_int_ctrl(BIO *bp, int cmd, long larg, int iarg);
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// BIO_reset resets |bio| to its initial state, the precise meaning of which
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// depends on the concrete type of |bio|. It returns one on success and zero
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// otherwise.
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OPENSSL_EXPORT int BIO_reset(BIO *bio);
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// BIO_eof returns non-zero when |bio| has reached end-of-file. The precise
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// meaning of which depends on the concrete type of |bio|. Note that in the
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// case of BIO_pair this always returns non-zero.
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OPENSSL_EXPORT int BIO_eof(BIO *bio);
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// BIO_set_flags ORs |flags| with |bio->flags|.
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OPENSSL_EXPORT void BIO_set_flags(BIO *bio, int flags);
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// BIO_test_flags returns |bio->flags| AND |flags|.
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OPENSSL_EXPORT int BIO_test_flags(const BIO *bio, int flags);
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// BIO_should_read returns non-zero if |bio| encountered a temporary error
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// while reading (i.e. EAGAIN), indicating that the caller should retry the
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// read.
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OPENSSL_EXPORT int BIO_should_read(const BIO *bio);
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// BIO_should_write returns non-zero if |bio| encountered a temporary error
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// while writing (i.e. EAGAIN), indicating that the caller should retry the
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// write.
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OPENSSL_EXPORT int BIO_should_write(const BIO *bio);
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// BIO_should_retry returns non-zero if the reason that caused a failed I/O
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// operation is temporary and thus the operation should be retried. Otherwise,
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// it was a permanent error and it returns zero.
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OPENSSL_EXPORT int BIO_should_retry(const BIO *bio);
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// BIO_should_io_special returns non-zero if |bio| encountered a temporary
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// error while performing a special I/O operation, indicating that the caller
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// should retry. The operation that caused the error is returned by
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// |BIO_get_retry_reason|.
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OPENSSL_EXPORT int BIO_should_io_special(const BIO *bio);
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// BIO_RR_CONNECT indicates that a connect would have blocked
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#define BIO_RR_CONNECT 0x02
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// BIO_RR_ACCEPT indicates that an accept would have blocked
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#define BIO_RR_ACCEPT 0x03
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// BIO_get_retry_reason returns the special I/O operation that needs to be
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// retried. The return value is one of the |BIO_RR_*| values.
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OPENSSL_EXPORT int BIO_get_retry_reason(const BIO *bio);
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// BIO_clear_flags ANDs |bio->flags| with the bitwise-complement of |flags|.
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OPENSSL_EXPORT void BIO_clear_flags(BIO *bio, int flags);
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// BIO_set_retry_read sets the |BIO_FLAGS_READ| and |BIO_FLAGS_SHOULD_RETRY|
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// flags on |bio|.
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OPENSSL_EXPORT void BIO_set_retry_read(BIO *bio);
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// BIO_set_retry_write sets the |BIO_FLAGS_WRITE| and |BIO_FLAGS_SHOULD_RETRY|
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// flags on |bio|.
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OPENSSL_EXPORT void BIO_set_retry_write(BIO *bio);
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// BIO_get_retry_flags gets the |BIO_FLAGS_READ|, |BIO_FLAGS_WRITE|,
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// |BIO_FLAGS_IO_SPECIAL| and |BIO_FLAGS_SHOULD_RETRY| flags from |bio|.
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OPENSSL_EXPORT int BIO_get_retry_flags(BIO *bio);
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// BIO_clear_retry_flags clears the |BIO_FLAGS_READ|, |BIO_FLAGS_WRITE|,
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// |BIO_FLAGS_IO_SPECIAL| and |BIO_FLAGS_SHOULD_RETRY| flags from |bio|.
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OPENSSL_EXPORT void BIO_clear_retry_flags(BIO *bio);
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// BIO_method_type returns the type of |bio|, which is one of the |BIO_TYPE_*|
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// values.
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OPENSSL_EXPORT int BIO_method_type(const BIO *bio);
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// These are passed to the BIO callback
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#define BIO_CB_FREE 0x01
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#define BIO_CB_READ 0x02
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#define BIO_CB_WRITE 0x03
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#define BIO_CB_PUTS 0x04
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#define BIO_CB_GETS 0x05
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#define BIO_CB_CTRL 0x06
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// The callback is called before and after the underling operation,
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// The BIO_CB_RETURN flag indicates if it is after the call
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#define BIO_CB_RETURN 0x80
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// bio_info_cb is the type of a callback function that can be called for most
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// BIO operations. The |event| argument is one of |BIO_CB_*| and can be ORed
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// with |BIO_CB_RETURN| if the callback is being made after the operation in
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// question. In that case, |return_value| will contain the return value from
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// the operation.
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typedef long (*bio_info_cb)(BIO *bio, int event, const char *parg, int cmd,
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long larg, long return_value);
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// BIO_callback_ctrl allows the callback function to be manipulated. The |cmd|
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// arg will generally be |BIO_CTRL_SET_CALLBACK| but arbitrary command values
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// can be interpreted by the |BIO|.
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OPENSSL_EXPORT long BIO_callback_ctrl(BIO *bio, int cmd, bio_info_cb fp);
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// BIO_pending returns the number of bytes pending to be read.
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OPENSSL_EXPORT size_t BIO_pending(const BIO *bio);
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// BIO_ctrl_pending calls |BIO_pending| and exists only for compatibility with
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// OpenSSL.
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OPENSSL_EXPORT size_t BIO_ctrl_pending(const BIO *bio);
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// BIO_wpending returns the number of bytes pending to be written.
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OPENSSL_EXPORT size_t BIO_wpending(const BIO *bio);
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// BIO_set_close sets the close flag for |bio|. The meaning of which depends on
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// the type of |bio| but, for example, a memory BIO interprets the close flag
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// as meaning that it owns its buffer. It returns one on success and zero
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// otherwise.
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OPENSSL_EXPORT int BIO_set_close(BIO *bio, int close_flag);
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// BIO_number_read returns the number of bytes that have been read from
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// |bio|.
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OPENSSL_EXPORT size_t BIO_number_read(const BIO *bio);
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// BIO_number_written returns the number of bytes that have been written to
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// |bio|.
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OPENSSL_EXPORT size_t BIO_number_written(const BIO *bio);
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// Managing chains of BIOs.
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//
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// BIOs can be put into chains where the output of one is used as the input of
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// the next etc. The most common case is a buffering BIO, which accepts and
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// buffers writes until flushed into the next BIO in the chain.
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// BIO_push adds |appended_bio| to the end of the chain with |bio| at the head.
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// It returns |bio|. Note that |appended_bio| may be the head of a chain itself
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// and thus this function can be used to join two chains.
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//
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// BIO_push takes ownership of the caller's reference to |appended_bio|.
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OPENSSL_EXPORT BIO *BIO_push(BIO *bio, BIO *appended_bio);
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// BIO_pop removes |bio| from the head of a chain and returns the next BIO in
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// the chain, or NULL if there is no next BIO.
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//
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// The caller takes ownership of the chain's reference to |bio|.
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OPENSSL_EXPORT BIO *BIO_pop(BIO *bio);
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// BIO_next returns the next BIO in the chain after |bio|, or NULL if there is
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// no such BIO.
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OPENSSL_EXPORT BIO *BIO_next(BIO *bio);
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// BIO_free_all calls |BIO_free|.
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//
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// TODO(fork): update callers and remove.
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OPENSSL_EXPORT void BIO_free_all(BIO *bio);
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// BIO_find_type walks a chain of BIOs and returns the first that matches
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// |type|, which is one of the |BIO_TYPE_*| values.
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OPENSSL_EXPORT BIO *BIO_find_type(BIO *bio, int type);
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// BIO_copy_next_retry sets the retry flags and |retry_reason| of |bio| from
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// the next BIO in the chain.
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OPENSSL_EXPORT void BIO_copy_next_retry(BIO *bio);
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// Printf functions.
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// BIO_printf behaves like |printf| but outputs to |bio| rather than a |FILE|.
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// It returns the number of bytes written or a negative number on error.
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OPENSSL_EXPORT int BIO_printf(BIO *bio, const char *format, ...)
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OPENSSL_PRINTF_FORMAT_FUNC(2, 3);
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// Utility functions.
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// BIO_indent prints min(|indent|, |max_indent|) spaces. It returns one on
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// success and zero otherwise.
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OPENSSL_EXPORT int BIO_indent(BIO *bio, unsigned indent, unsigned max_indent);
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// BIO_hexdump writes a hex dump of |data| to |bio|. Each line will be indented
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// by |indent| spaces.
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OPENSSL_EXPORT int BIO_hexdump(BIO *bio, const uint8_t *data, size_t len,
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unsigned indent);
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// ERR_print_errors prints the current contents of the error stack to |bio|
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// using human readable strings where possible.
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OPENSSL_EXPORT void ERR_print_errors(BIO *bio);
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// BIO_read_asn1 reads a single ASN.1 object from |bio|. If successful it sets
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// |*out| to be an allocated buffer (that should be freed with |OPENSSL_free|),
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// |*out_size| to the length, in bytes, of that buffer and returns one.
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// Otherwise it returns zero.
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//
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// If the length of the object is greater than |max_len| or 2^32 then the
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// function will fail. Long-form tags are not supported. If the length of the
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// object is indefinite the full contents of |bio| are read, unless it would be
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// greater than |max_len|, in which case the function fails.
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//
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// If the function fails then some unknown amount of data may have been read
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// from |bio|.
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OPENSSL_EXPORT int BIO_read_asn1(BIO *bio, uint8_t **out, size_t *out_len,
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size_t max_len);
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// Memory BIOs.
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//
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// Memory BIOs can be used as a read-only source (with |BIO_new_mem_buf|) or a
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// writable sink (with |BIO_new|, |BIO_s_mem| and |BIO_get_mem_buf|). Data
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// written to a writable, memory BIO can be recalled by reading from it.
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//
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// Calling |BIO_reset| on a read-only BIO resets it to the original contents.
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// On a writable BIO, it clears any data.
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//
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// If the close flag is set to |BIO_NOCLOSE| (not the default) then the
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// underlying |BUF_MEM| will not be freed when the |BIO| is freed.
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//
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// Memory BIOs support |BIO_gets| and |BIO_puts|.
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//
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// |BIO_ctrl_pending| returns the number of bytes currently stored.
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// BIO_NOCLOSE and |BIO_CLOSE| can be used as symbolic arguments when a "close
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// flag" is passed to a BIO function.
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#define BIO_NOCLOSE 0
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#define BIO_CLOSE 1
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// BIO_s_mem returns a |BIO_METHOD| that uses a in-memory buffer.
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OPENSSL_EXPORT const BIO_METHOD *BIO_s_mem(void);
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// BIO_new_mem_buf creates read-only BIO that reads from |len| bytes at |buf|.
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// It does not take ownership of |buf|. It returns the BIO or NULL on error.
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//
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// If |len| is negative, then |buf| is treated as a NUL-terminated string, but
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// don't depend on this in new code.
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OPENSSL_EXPORT BIO *BIO_new_mem_buf(const void *buf, int len);
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// BIO_mem_contents sets |*out_contents| to point to the current contents of
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// |bio| and |*out_len| to contain the length of that data. It returns one on
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// success and zero otherwise.
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OPENSSL_EXPORT int BIO_mem_contents(const BIO *bio,
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const uint8_t **out_contents,
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size_t *out_len);
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// BIO_get_mem_data sets |*contents| to point to the current contents of |bio|
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// and returns the length of the data.
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//
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// WARNING: don't use this, use |BIO_mem_contents|. A return value of zero from
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// this function can mean either that it failed or that the memory buffer is
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// empty.
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OPENSSL_EXPORT long BIO_get_mem_data(BIO *bio, char **contents);
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// BIO_get_mem_ptr sets |*out| to a BUF_MEM containing the current contents of
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// |bio|. It returns one on success or zero on error.
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OPENSSL_EXPORT int BIO_get_mem_ptr(BIO *bio, BUF_MEM **out);
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// BIO_set_mem_buf sets |b| as the contents of |bio|. If |take_ownership| is
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// non-zero, then |b| will be freed when |bio| is closed. Returns one on
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// success or zero otherwise.
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OPENSSL_EXPORT int BIO_set_mem_buf(BIO *bio, BUF_MEM *b, int take_ownership);
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// BIO_set_mem_eof_return sets the value that will be returned from reading
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// |bio| when empty. If |eof_value| is zero then an empty memory BIO will
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// return EOF (that is it will return zero and |BIO_should_retry| will be
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// false). If |eof_value| is non zero then it will return |eof_value| when it
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// is empty and it will set the read retry flag (that is |BIO_read_retry| is
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// true). To avoid ambiguity with a normal positive return value, |eof_value|
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// should be set to a negative value, typically -1.
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//
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// For a read-only BIO, the default is zero (EOF). For a writable BIO, the
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// default is -1 so that additional data can be written once exhausted.
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OPENSSL_EXPORT int BIO_set_mem_eof_return(BIO *bio, int eof_value);
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// File descriptor BIOs.
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//
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// File descriptor BIOs are wrappers around the system's |read| and |write|
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// functions. If the close flag is set then then |close| is called on the
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// underlying file descriptor when the BIO is freed.
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//
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// |BIO_reset| attempts to seek the file pointer to the start of file using
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// |lseek|.
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// BIO_s_fd returns a |BIO_METHOD| for file descriptor fds.
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OPENSSL_EXPORT const BIO_METHOD *BIO_s_fd(void);
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// BIO_new_fd creates a new file descriptor BIO wrapping |fd|. If |close_flag|
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// is non-zero, then |fd| will be closed when the BIO is.
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OPENSSL_EXPORT BIO *BIO_new_fd(int fd, int close_flag);
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// BIO_set_fd sets the file descriptor of |bio| to |fd|. If |close_flag| is
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// non-zero then |fd| will be closed when |bio| is. It returns one on success
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// or zero on error.
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//
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// This function may also be used with socket BIOs (see |BIO_s_socket| and
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// |BIO_new_socket|).
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OPENSSL_EXPORT int BIO_set_fd(BIO *bio, int fd, int close_flag);
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// BIO_get_fd returns the file descriptor currently in use by |bio| or -1 if
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// |bio| does not wrap a file descriptor. If there is a file descriptor and
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// |out_fd| is not NULL, it also sets |*out_fd| to the file descriptor.
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//
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// This function may also be used with socket BIOs (see |BIO_s_socket| and
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// |BIO_new_socket|).
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OPENSSL_EXPORT int BIO_get_fd(BIO *bio, int *out_fd);
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// File BIOs.
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//
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// File BIOs are wrappers around a C |FILE| object.
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//
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// |BIO_flush| on a file BIO calls |fflush| on the wrapped stream.
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//
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// |BIO_reset| attempts to seek the file pointer to the start of file using
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// |fseek|.
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//
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// Setting the close flag causes |fclose| to be called on the stream when the
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// BIO is freed.
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// BIO_s_file returns a BIO_METHOD that wraps a |FILE|.
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OPENSSL_EXPORT const BIO_METHOD *BIO_s_file(void);
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// BIO_new_file creates a file BIO by opening |filename| with the given mode.
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// See the |fopen| manual page for details of the mode argument.
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OPENSSL_EXPORT BIO *BIO_new_file(const char *filename, const char *mode);
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// BIO_new_fp creates a new file BIO that wraps the given |FILE|. If
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// |close_flag| is |BIO_CLOSE|, then |fclose| will be called on |stream| when
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// the BIO is closed.
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OPENSSL_EXPORT BIO *BIO_new_fp(FILE *stream, int close_flag);
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// BIO_get_fp sets |*out_file| to the current |FILE| for |bio|. It returns one
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// on success and zero otherwise.
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OPENSSL_EXPORT int BIO_get_fp(BIO *bio, FILE **out_file);
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// BIO_set_fp sets the |FILE| for |bio|. If |close_flag| is |BIO_CLOSE| then
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// |fclose| will be called on |file| when |bio| is closed. It returns one on
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// success and zero otherwise.
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OPENSSL_EXPORT int BIO_set_fp(BIO *bio, FILE *file, int close_flag);
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// BIO_read_filename opens |filename| for reading and sets the result as the
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// |FILE| for |bio|. It returns one on success and zero otherwise. The |FILE|
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// will be closed when |bio| is freed.
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OPENSSL_EXPORT int BIO_read_filename(BIO *bio, const char *filename);
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// BIO_write_filename opens |filename| for writing and sets the result as the
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// |FILE| for |bio|. It returns one on success and zero otherwise. The |FILE|
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// will be closed when |bio| is freed.
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OPENSSL_EXPORT int BIO_write_filename(BIO *bio, const char *filename);
|
|
// BIO_append_filename opens |filename| for appending and sets the result as
|
// the |FILE| for |bio|. It returns one on success and zero otherwise. The
|
// |FILE| will be closed when |bio| is freed.
|
OPENSSL_EXPORT int BIO_append_filename(BIO *bio, const char *filename);
|
|
// BIO_rw_filename opens |filename| for reading and writing and sets the result
|
// as the |FILE| for |bio|. It returns one on success and zero otherwise. The
|
// |FILE| will be closed when |bio| is freed.
|
OPENSSL_EXPORT int BIO_rw_filename(BIO *bio, const char *filename);
|
|
|
// Socket BIOs.
|
//
|
// Socket BIOs behave like file descriptor BIOs but, on Windows systems, wrap
|
// the system's |recv| and |send| functions instead of |read| and |write|. On
|
// Windows, file descriptors are provided by C runtime and are not
|
// interchangeable with sockets.
|
//
|
// Socket BIOs may be used with |BIO_set_fd| and |BIO_get_fd|.
|
//
|
// TODO(davidben): Add separate APIs and fix the internals to use |SOCKET|s
|
// around rather than rely on int casts.
|
|
OPENSSL_EXPORT const BIO_METHOD *BIO_s_socket(void);
|
|
// BIO_new_socket allocates and initialises a fresh BIO which will read and
|
// write to the socket |fd|. If |close_flag| is |BIO_CLOSE| then closing the
|
// BIO will close |fd|. It returns the fresh |BIO| or NULL on error.
|
OPENSSL_EXPORT BIO *BIO_new_socket(int fd, int close_flag);
|
|
|
// Connect BIOs.
|
//
|
// A connection BIO creates a network connection and transfers data over the
|
// resulting socket.
|
|
OPENSSL_EXPORT const BIO_METHOD *BIO_s_connect(void);
|
|
// BIO_new_connect returns a BIO that connects to the given hostname and port.
|
// The |host_and_optional_port| argument should be of the form
|
// "www.example.com" or "www.example.com:443". If the port is omitted, it must
|
// be provided with |BIO_set_conn_port|.
|
//
|
// It returns the new BIO on success, or NULL on error.
|
OPENSSL_EXPORT BIO *BIO_new_connect(const char *host_and_optional_port);
|
|
// BIO_set_conn_hostname sets |host_and_optional_port| as the hostname and
|
// optional port that |bio| will connect to. If the port is omitted, it must be
|
// provided with |BIO_set_conn_port|.
|
//
|
// It returns one on success and zero otherwise.
|
OPENSSL_EXPORT int BIO_set_conn_hostname(BIO *bio,
|
const char *host_and_optional_port);
|
|
// BIO_set_conn_port sets |port_str| as the port or service name that |bio|
|
// will connect to. It returns one on success and zero otherwise.
|
OPENSSL_EXPORT int BIO_set_conn_port(BIO *bio, const char *port_str);
|
|
// BIO_set_conn_int_port sets |*port| as the port that |bio| will connect to.
|
// It returns one on success and zero otherwise.
|
OPENSSL_EXPORT int BIO_set_conn_int_port(BIO *bio, const int *port);
|
|
// BIO_set_nbio sets whether |bio| will use non-blocking I/O operations. It
|
// returns one on success and zero otherwise.
|
OPENSSL_EXPORT int BIO_set_nbio(BIO *bio, int on);
|
|
// BIO_do_connect connects |bio| if it has not been connected yet. It returns
|
// one on success and <= 0 otherwise.
|
OPENSSL_EXPORT int BIO_do_connect(BIO *bio);
|
|
|
// Datagram BIOs.
|
//
|
// TODO(fork): not implemented.
|
|
#define BIO_CTRL_DGRAM_QUERY_MTU 40 // as kernel for current MTU
|
|
#define BIO_CTRL_DGRAM_SET_MTU 42 /* set cached value for MTU. want to use
|
this if asking the kernel fails */
|
|
#define BIO_CTRL_DGRAM_MTU_EXCEEDED 43 /* check whether the MTU was exceed in
|
the previous write operation. */
|
|
// BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT is unsupported as it is unused by consumers
|
// and depends on |timeval|, which is not 2038-clean on all platforms.
|
|
#define BIO_CTRL_DGRAM_GET_PEER 46
|
|
#define BIO_CTRL_DGRAM_GET_FALLBACK_MTU 47
|
|
|
// BIO Pairs.
|
//
|
// BIO pairs provide a "loopback" like system: a pair of BIOs where data
|
// written to one can be read from the other and vice versa.
|
|
// BIO_new_bio_pair sets |*out1| and |*out2| to two freshly created BIOs where
|
// data written to one can be read from the other and vice versa. The
|
// |writebuf1| argument gives the size of the buffer used in |*out1| and
|
// |writebuf2| for |*out2|. It returns one on success and zero on error.
|
OPENSSL_EXPORT int BIO_new_bio_pair(BIO **out1, size_t writebuf1, BIO **out2,
|
size_t writebuf2);
|
|
// BIO_ctrl_get_read_request returns the number of bytes that the other side of
|
// |bio| tried (unsuccessfully) to read.
|
OPENSSL_EXPORT size_t BIO_ctrl_get_read_request(BIO *bio);
|
|
// BIO_ctrl_get_write_guarantee returns the number of bytes that |bio| (which
|
// must have been returned by |BIO_new_bio_pair|) will accept on the next
|
// |BIO_write| call.
|
OPENSSL_EXPORT size_t BIO_ctrl_get_write_guarantee(BIO *bio);
|
|
// BIO_shutdown_wr marks |bio| as closed, from the point of view of the other
|
// side of the pair. Future |BIO_write| calls on |bio| will fail. It returns
|
// one on success and zero otherwise.
|
OPENSSL_EXPORT int BIO_shutdown_wr(BIO *bio);
|
|
|
// Custom BIOs.
|
//
|
// Consumers can create custom |BIO|s by filling in a |BIO_METHOD| and using
|
// low-level control functions to set state.
|
|
// BIO_get_new_index returns a new "type" value for a custom |BIO|.
|
OPENSSL_EXPORT int BIO_get_new_index(void);
|
|
// BIO_meth_new returns a newly-allocated |BIO_METHOD| or NULL on allocation
|
// error. The |type| specifies the type that will be returned by
|
// |BIO_method_type|. If this is unnecessary, this value may be zero. The |name|
|
// parameter is vestigial and may be NULL.
|
//
|
// Use the |BIO_meth_set_*| functions below to initialize the |BIO_METHOD|. The
|
// function implementations may use |BIO_set_data| and |BIO_get_data| to add
|
// method-specific state to associated |BIO|s. Additionally, |BIO_set_init| must
|
// be called after an associated |BIO| is fully initialized.
|
OPENSSL_EXPORT BIO_METHOD *BIO_meth_new(int type, const char *name);
|
|
// BIO_meth_free releases memory associated with |method|.
|
OPENSSL_EXPORT void BIO_meth_free(BIO_METHOD *method);
|
|
// BIO_meth_set_create sets a function to be called on |BIO_new| for |method|
|
// and returns one. The function should return one on success and zero on
|
// error.
|
OPENSSL_EXPORT int BIO_meth_set_create(BIO_METHOD *method,
|
int (*create)(BIO *));
|
|
// BIO_meth_set_destroy sets a function to release data associated with a |BIO|
|
// and returns one. The function's return value is ignored.
|
OPENSSL_EXPORT int BIO_meth_set_destroy(BIO_METHOD *method,
|
int (*destroy)(BIO *));
|
|
// BIO_meth_set_write sets the implementation of |BIO_write| for |method| and
|
// returns one.
|
OPENSSL_EXPORT int BIO_meth_set_write(BIO_METHOD *method,
|
int (*write)(BIO *, const char *, int));
|
|
// BIO_meth_set_read sets the implementation of |BIO_read| for |method| and
|
// returns one.
|
OPENSSL_EXPORT int BIO_meth_set_read(BIO_METHOD *method,
|
int (*read)(BIO *, char *, int));
|
|
// BIO_meth_set_gets sets the implementation of |BIO_gets| for |method| and
|
// returns one.
|
OPENSSL_EXPORT int BIO_meth_set_gets(BIO_METHOD *method,
|
int (*gets)(BIO *, char *, int));
|
|
// BIO_meth_set_ctrl sets the implementation of |BIO_ctrl| for |method| and
|
// returns one.
|
OPENSSL_EXPORT int BIO_meth_set_ctrl(BIO_METHOD *method,
|
long (*ctrl)(BIO *, int, long, void *));
|
|
// BIO_set_data sets custom data on |bio|. It may be retried with
|
// |BIO_get_data|.
|
OPENSSL_EXPORT void BIO_set_data(BIO *bio, void *ptr);
|
|
// BIO_get_data returns custom data on |bio| set by |BIO_get_data|.
|
OPENSSL_EXPORT void *BIO_get_data(BIO *bio);
|
|
// BIO_set_init sets whether |bio| has been fully initialized. Until fully
|
// initialized, |BIO_read| and |BIO_write| will fail.
|
OPENSSL_EXPORT void BIO_set_init(BIO *bio, int init);
|
|
// BIO_get_init returns whether |bio| has been fully initialized.
|
OPENSSL_EXPORT int BIO_get_init(BIO *bio);
|
|
// These are values of the |cmd| argument to |BIO_ctrl|.
|
#define BIO_CTRL_RESET 1 // opt - rewind/zero etc
|
#define BIO_CTRL_EOF 2 // opt - are we at the eof
|
#define BIO_CTRL_INFO 3 // opt - extra tit-bits
|
#define BIO_CTRL_SET 4 // man - set the 'IO' type
|
#define BIO_CTRL_GET 5 // man - get the 'IO' type
|
#define BIO_CTRL_PUSH 6
|
#define BIO_CTRL_POP 7
|
#define BIO_CTRL_GET_CLOSE 8 // man - set the 'close' on free
|
#define BIO_CTRL_SET_CLOSE 9 // man - set the 'close' on free
|
#define BIO_CTRL_PENDING 10 // opt - is their more data buffered
|
#define BIO_CTRL_FLUSH 11 // opt - 'flush' buffered output
|
#define BIO_CTRL_WPENDING 13 // opt - number of bytes still to write
|
// callback is int cb(BIO *bio,state,ret);
|
#define BIO_CTRL_SET_CALLBACK 14 // opt - set callback function
|
#define BIO_CTRL_GET_CALLBACK 15 // opt - set callback function
|
#define BIO_CTRL_SET_FILENAME 30 // BIO_s_file special
|
|
// BIO_CTRL_DUP is never used, but exists to allow code to compile more
|
// easily.
|
#define BIO_CTRL_DUP 12
|
|
|
// Deprecated functions.
|
|
// BIO_f_base64 returns a filter |BIO| that base64-encodes data written into
|
// it, and decodes data read from it. |BIO_gets| is not supported. Call
|
// |BIO_flush| when done writing, to signal that no more data are to be
|
// encoded. The flag |BIO_FLAGS_BASE64_NO_NL| may be set to encode all the data
|
// on one line.
|
OPENSSL_EXPORT const BIO_METHOD *BIO_f_base64(void);
|
|
OPENSSL_EXPORT void BIO_set_retry_special(BIO *bio);
|
|
// BIO_set_write_buffer_size returns zero.
|
OPENSSL_EXPORT int BIO_set_write_buffer_size(BIO *bio, int buffer_size);
|
|
// BIO_set_shutdown sets a method-specific "shutdown" bit on |bio|.
|
OPENSSL_EXPORT void BIO_set_shutdown(BIO *bio, int shutdown);
|
|
// BIO_get_shutdown returns the method-specific "shutdown" bit.
|
OPENSSL_EXPORT int BIO_get_shutdown(BIO *bio);
|
|
// BIO_meth_set_puts returns one. |BIO_puts| is implemented with |BIO_write| in
|
// BoringSSL.
|
OPENSSL_EXPORT int BIO_meth_set_puts(BIO_METHOD *method,
|
int (*puts)(BIO *, const char *));
|
|
|
// Private functions
|
|
#define BIO_FLAGS_READ 0x01
|
#define BIO_FLAGS_WRITE 0x02
|
#define BIO_FLAGS_IO_SPECIAL 0x04
|
#define BIO_FLAGS_RWS (BIO_FLAGS_READ | BIO_FLAGS_WRITE | BIO_FLAGS_IO_SPECIAL)
|
#define BIO_FLAGS_SHOULD_RETRY 0x08
|
#define BIO_FLAGS_BASE64_NO_NL 0x100
|
// This is used with memory BIOs: it means we shouldn't free up or change the
|
// data in any way.
|
#define BIO_FLAGS_MEM_RDONLY 0x200
|
|
// These are the 'types' of BIOs
|
#define BIO_TYPE_NONE 0
|
#define BIO_TYPE_MEM (1 | 0x0400)
|
#define BIO_TYPE_FILE (2 | 0x0400)
|
#define BIO_TYPE_FD (4 | 0x0400 | 0x0100)
|
#define BIO_TYPE_SOCKET (5 | 0x0400 | 0x0100)
|
#define BIO_TYPE_NULL (6 | 0x0400)
|
#define BIO_TYPE_SSL (7 | 0x0200)
|
#define BIO_TYPE_MD (8 | 0x0200) // passive filter
|
#define BIO_TYPE_BUFFER (9 | 0x0200) // filter
|
#define BIO_TYPE_CIPHER (10 | 0x0200) // filter
|
#define BIO_TYPE_BASE64 (11 | 0x0200) // filter
|
#define BIO_TYPE_CONNECT (12 | 0x0400 | 0x0100) // socket - connect
|
#define BIO_TYPE_ACCEPT (13 | 0x0400 | 0x0100) // socket for accept
|
#define BIO_TYPE_PROXY_CLIENT (14 | 0x0200) // client proxy BIO
|
#define BIO_TYPE_PROXY_SERVER (15 | 0x0200) // server proxy BIO
|
#define BIO_TYPE_NBIO_TEST (16 | 0x0200) // server proxy BIO
|
#define BIO_TYPE_NULL_FILTER (17 | 0x0200)
|
#define BIO_TYPE_BER (18 | 0x0200) // BER -> bin filter
|
#define BIO_TYPE_BIO (19 | 0x0400) // (half a) BIO pair
|
#define BIO_TYPE_LINEBUFFER (20 | 0x0200) // filter
|
#define BIO_TYPE_DGRAM (21 | 0x0400 | 0x0100)
|
#define BIO_TYPE_ASN1 (22 | 0x0200) // filter
|
#define BIO_TYPE_COMP (23 | 0x0200) // filter
|
|
// |BIO_TYPE_DESCRIPTOR| denotes that the |BIO| responds to the |BIO_C_SET_FD|
|
// (|BIO_set_fd|) and |BIO_C_GET_FD| (|BIO_get_fd|) control hooks.
|
#define BIO_TYPE_DESCRIPTOR 0x0100 // socket, fd, connect or accept
|
#define BIO_TYPE_FILTER 0x0200
|
#define BIO_TYPE_SOURCE_SINK 0x0400
|
|
// BIO_TYPE_START is the first user-allocated |BIO| type. No pre-defined type,
|
// flag bits aside, may exceed this value.
|
#define BIO_TYPE_START 128
|
|
struct bio_method_st {
|
int type;
|
const char *name;
|
int (*bwrite)(BIO *, const char *, int);
|
int (*bread)(BIO *, char *, int);
|
// TODO(fork): remove bputs.
|
int (*bputs)(BIO *, const char *);
|
int (*bgets)(BIO *, char *, int);
|
long (*ctrl)(BIO *, int, long, void *);
|
int (*create)(BIO *);
|
int (*destroy)(BIO *);
|
long (*callback_ctrl)(BIO *, int, bio_info_cb);
|
};
|
|
struct bio_st {
|
const BIO_METHOD *method;
|
|
// init is non-zero if this |BIO| has been initialised.
|
int init;
|
// shutdown is often used by specific |BIO_METHOD|s to determine whether
|
// they own some underlying resource. This flag can often by controlled by
|
// |BIO_set_close|. For example, whether an fd BIO closes the underlying fd
|
// when it, itself, is closed.
|
int shutdown;
|
int flags;
|
int retry_reason;
|
// num is a BIO-specific value. For example, in fd BIOs it's used to store a
|
// file descriptor.
|
int num;
|
CRYPTO_refcount_t references;
|
void *ptr;
|
// next_bio points to the next |BIO| in a chain. This |BIO| owns a reference
|
// to |next_bio|.
|
BIO *next_bio; // used by filter BIOs
|
size_t num_read, num_write;
|
};
|
|
#define BIO_C_SET_CONNECT 100
|
#define BIO_C_DO_STATE_MACHINE 101
|
#define BIO_C_SET_NBIO 102
|
#define BIO_C_SET_PROXY_PARAM 103
|
#define BIO_C_SET_FD 104
|
#define BIO_C_GET_FD 105
|
#define BIO_C_SET_FILE_PTR 106
|
#define BIO_C_GET_FILE_PTR 107
|
#define BIO_C_SET_FILENAME 108
|
#define BIO_C_SET_SSL 109
|
#define BIO_C_GET_SSL 110
|
#define BIO_C_SET_MD 111
|
#define BIO_C_GET_MD 112
|
#define BIO_C_GET_CIPHER_STATUS 113
|
#define BIO_C_SET_BUF_MEM 114
|
#define BIO_C_GET_BUF_MEM_PTR 115
|
#define BIO_C_GET_BUFF_NUM_LINES 116
|
#define BIO_C_SET_BUFF_SIZE 117
|
#define BIO_C_SET_ACCEPT 118
|
#define BIO_C_SSL_MODE 119
|
#define BIO_C_GET_MD_CTX 120
|
#define BIO_C_GET_PROXY_PARAM 121
|
#define BIO_C_SET_BUFF_READ_DATA 122 // data to read first
|
#define BIO_C_GET_ACCEPT 124
|
#define BIO_C_SET_SSL_RENEGOTIATE_BYTES 125
|
#define BIO_C_GET_SSL_NUM_RENEGOTIATES 126
|
#define BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT 127
|
#define BIO_C_FILE_SEEK 128
|
#define BIO_C_GET_CIPHER_CTX 129
|
#define BIO_C_SET_BUF_MEM_EOF_RETURN 130 //return end of input value
|
#define BIO_C_SET_BIND_MODE 131
|
#define BIO_C_GET_BIND_MODE 132
|
#define BIO_C_FILE_TELL 133
|
#define BIO_C_GET_SOCKS 134
|
#define BIO_C_SET_SOCKS 135
|
|
#define BIO_C_SET_WRITE_BUF_SIZE 136 // for BIO_s_bio
|
#define BIO_C_GET_WRITE_BUF_SIZE 137
|
#define BIO_C_GET_WRITE_GUARANTEE 140
|
#define BIO_C_GET_READ_REQUEST 141
|
#define BIO_C_SHUTDOWN_WR 142
|
#define BIO_C_NREAD0 143
|
#define BIO_C_NREAD 144
|
#define BIO_C_NWRITE0 145
|
#define BIO_C_NWRITE 146
|
#define BIO_C_RESET_READ_REQUEST 147
|
#define BIO_C_SET_MD_CTX 148
|
|
#define BIO_C_SET_PREFIX 149
|
#define BIO_C_GET_PREFIX 150
|
#define BIO_C_SET_SUFFIX 151
|
#define BIO_C_GET_SUFFIX 152
|
|
#define BIO_C_SET_EX_ARG 153
|
#define BIO_C_GET_EX_ARG 154
|
|
|
#if defined(__cplusplus)
|
} // extern C
|
|
extern "C++" {
|
|
namespace bssl {
|
|
BORINGSSL_MAKE_DELETER(BIO, BIO_free)
|
|
} // namespace bssl
|
|
} // extern C++
|
|
#endif
|
|
#define BIO_R_BAD_FOPEN_MODE 100
|
#define BIO_R_BROKEN_PIPE 101
|
#define BIO_R_CONNECT_ERROR 102
|
#define BIO_R_ERROR_SETTING_NBIO 103
|
#define BIO_R_INVALID_ARGUMENT 104
|
#define BIO_R_IN_USE 105
|
#define BIO_R_KEEPALIVE 106
|
#define BIO_R_NBIO_CONNECT_ERROR 107
|
#define BIO_R_NO_HOSTNAME_SPECIFIED 108
|
#define BIO_R_NO_PORT_SPECIFIED 109
|
#define BIO_R_NO_SUCH_FILE 110
|
#define BIO_R_NULL_PARAMETER 111
|
#define BIO_R_SYS_LIB 112
|
#define BIO_R_UNABLE_TO_CREATE_SOCKET 113
|
#define BIO_R_UNINITIALIZED 114
|
#define BIO_R_UNSUPPORTED_METHOD 115
|
#define BIO_R_WRITE_TO_READ_ONLY_BIO 116
|
|
#endif // OPENSSL_HEADER_BIO_H
|
