bio.h File Reference

This file provides the Basic Input/Output (BIO) functionality including functions, typedefs and structure declarations.

#include "r_com.h"
#include "r_vararg.h"
#include "bio_err.h"

Go to the source code of this file.

Data Structures

BIO_METHOD

This structure stores pointers to functions that implement the BIO methods. More...

BIO

This structure contains the data and BIO method structure. More...

Defines

#define BIO_TYPE_FILTER

The base type indicating that a BIO of this type modifies the data written to, or read from a source/sink BIO. More...

#define BIO_TYPE_SOURCE_SINK

The base type indicating that a BIO of this type takes data from a device, and/or sends data to a device (data exchange). More...

#define BIO_TYPE_DESCRIPTOR

The base type that may be combined with the source/sink base type to indicate that the BIO uses a file descriptor. More...

#define BIO_TYPE_DGRAM

The base type that may be combined with the source/sink base type to indicate that the BIO is a datagram socket.

#define BIO_TYPE_NONE

Indicates that the BIO does not have a defined type.

#define BIO_TYPE_MEM

Indicates that the BIO is a memory buffer source/sink BIO.

#define BIO_TYPE_FILE

Indicates that the BIO is a file pointer source/sink BIO.

#define BIO_TYPE_FD

Indicates that the BIO is a file descriptor source/sink BIO.

#define BIO_TYPE_NULL

Indicates that the BIO is a NULL source/sink BIO. More...

#define BIO_TYPE_BUFFER

Indicates that the BIO is a data buffer filter BIO. More...

#define BIO_TYPE_BASE64

Indicates that the BIO is a data base 64 filter BIO.

#define BIO_TYPE_NULL_FILTER

Indicates that the BIO is a NULL filter BIO. More...

#define BIO_CTRL_RESET

Rewinds to the start of input or output and resets the state of the BIO. More...

#define BIO_CTRL_EOF

Checks if the BIO has reached the End-of-File (EOF) marker.

#define BIO_CTRL_INFO

Retrieves extra information from the BIO. More...

#define BIO_CTRL_SET

Sets the BIO I/O type.

#define BIO_CTRL_GET

Retrieves the BIO I/O type.

#define BIO_CTRL_PUSH

An internal control used for BIO stack manipulation.

#define BIO_CTRL_POP

An internal control used for BIO stack manipulation.

#define BIO_CTRL_GET_CLOSE

Retrieves the state of the BIO shutdown flag used by BIO_free(). More...

#define BIO_CTRL_SET_CLOSE

Sets the state of the BIO shutdown flag used by BIO_free(). More...

#define BIO_CTRL_PENDING

Checks if there is more data buffered in the BIO be use.

#define BIO_CTRL_FLUSH

Flushes any remaining data from the BIO data buffer.

#define BIO_CTRL_DUP

Extra information to use for a duplicated BIO.

#define BIO_CTRL_WPENDING

Retrieves the number of Bytes in the BIO data buffer pending to write.

#define BIO_CTRL_SET_CALLBACK

Sets the BIO callback function.

#define BIO_CTRL_GET_CALLBACK

Retrieves a pointer to a BIO callback function.

#define BIO_CTRL_SET_FILENAME

Sets the file name to be used by the file BIO.

#define BIO_NOCLOSE

Indicates not to close the I/O stream on BIO_free(). More...

#define BIO_CLOSE

Indicates to close the I/O stream on BIO_free(). More...

#define BIO_FLAGS_READ

Indicates that the BIO has data to read.

#define BIO_FLAGS_WRITE

Indicates that the BIO has data to write.

#define BIO_FLAGS_IO_SPECIAL

Indicates that the BIO performs custom socket I/O. More...

#define BIO_FLAGS_RWS

Indicates a combination of BIO_FLAGS_READ, BIO_FLAGS_WRITE and BIO_FLAGS_IO_SPECIAL.

#define BIO_FLAGS_SHOULD_RETRY

Indicates whether a retry on write or read should be attempted for the BIO. More...

#define BIO_FLAGS_FLUSH_ON_WRITE

Indicates that the BIO should flush the data buffer on the write operation.

#define BIO_FLAGS_EOM

Indicates that there is no more data in the message.

#define BIO_RR_CONNECT

Returned from the connect BIO when a connect would have been blocked.

#define BIO_RR_ACCEPT

Returned from the accept BIO. More...

#define BIO_CB_FREE

Indicates that the BIO callback function was called during an execution of BIO_free().

#define BIO_CB_READ

Indicates that the BIO callback function was called during an execution of BIO_read().

#define BIO_CB_WRITE

Indicates that the BIO callback function was called during an execution of BIO_write().

#define BIO_CB_PUTS

Indicates that the BIO callback function was called during an execution of BIO_puts().

#define BIO_CB_GETS

Indicates that the BIO callback function was called during an execution of BIO_gets().

#define BIO_CB_CTRL

Indicates that the BIO callback function was called during an execution of BIO_ctrl().

#define BIO_CB_FUNC_MASK

Used to mask the function number of the command.

#define BIO_CB_RETURN

Indicates that the BIO callback function was called after the execution of the underlying operation, rather than before. More...

#define BIO_CB_TYPE_FUNC

This is the standard callback function. More...

#define BIO_CB_TYPE_INFO

This is the information callback for connections. More...

#define BIO_CB_TYPE_STATE

This is the state callback. More...

#define BIO_C_NEXT_MSG

Perform processing to prepare for the next message.

#define BIO_C_SET_STORE

Set the store context against the BIO filter.

#define BIO_C_SET_VFY_CTX

Set the verification context against the BIO filter.

#define BIO_C_SET_EITEMS

Set the R_EITEMS against the BIO filter.

#define BIO_C_SET_CTX

Set the context for further operations against the BIO filter.

#define BIO_C_SET_CODE

Set the OP program code against the BIO filter.

#define BIO_C_SET_STATE_CB

Set the state callback and argument against the BIO filter.

#define BIO_C_GET_STATE_CB

Retrieve the state callback and argument from the BIO filter.

#define BIO_C_END_OF_MSG

Indicate that all the data has been written and any post-processing should start and/or trailing data should now be put out.

#define BIO_C_STATE_STRING

Obtain the string corresponding to the state value passed.

#define BIO_C_SET_PADDING_MODE

Set the padding method for a cipher BIO.

#define BIO_C_SET_ASYM_KEY

Set the private asymmetric key for a cryptographic message BIO. More...

#define BIO_C_SET_CERT

Set the certificate of a recipient for a cryptographic message BIO. More...

#define BIO_C_SET_ALG_ID

Set the ID of the encryption algorithm used in encrypting the content data of an enveloped message.

#define BIO_C_GET_PARAMS

Get the parameters of the cryptographic algorithm.

#define BIO_C_SET_KEY_SIZE

Set the size (length) of the key.

#define BIO_C_SET_EFF_BITS

Set the effective key bits.

#define BIO_C_SET_NO_ROUNDS

Set the number of rounds.

#define BIO_C_SET_WRAPPED

Set whether the cryptographic message is wrapped.

#define BIO_C_SET_CONTENT_TYPE

Set the content type of the cryptographic message.

#define BIO_C_INIT

Initialize the BIO with the data passed in.

#define BIO_DUMP_FORMAT_HEX

Format the output of each Byte as two hexadecimal characters.

#define BIO_DUMP_FORMAT_HEX_PREFIX

Format the output of each Byte as '0x' (zero-small-x), followed by two hexadecimal characters.

#define BIO_PRINT_HEX_REVERSE

The BIO_print_hex() flag required for printing little-endian numbers. More...

Typedefs

typedef struct bio_st BIO

The BIO object type identifier.

typedef long BIO_CB_FUNC_T (BIO *bio, int cmd, char *argp, int argi, long argl, long ret)

Used for creating user-defined debugging routines or surrender functions. More...

typedef long R_BIO_CB_FUNC_T (BIO *bio, int cmd, char *argp, int argi, long argl, long ret)

Deprecated name for the BIO callback type.

typedef int BIO_STATE_CB_FUNC_T (BIO *bio, int type, int state, int ret, int flag, char *cb_arg)

The type of callback function that reports on the BIO state. More...

typedef struct bio_state_cb_st BIO_STATE_CB

The type used to hold the state callback and its user-defined argument for transportation.

typedef struct bio_init_st BIO_INIT

This structure stores the data that is required to perform initialization on a new BIO that was created from the resource list.

typedef struct bio_method_st BIO_METHOD

This structure stores pointers to functions that implement the BIO methods. More...

Functions

long BIO_set_fp (BIO *bio, char *fp, long flags)

Sets the file pointer fp to be used with the BIO bio. More...

long BIO_get_fp (BIO *bio, char *fp)

Returns the file pointer associated with the BIO bio. More...

int BIO_seek (BIO *bio, long offset)

Moves the current position in the BIO bio. More...

int BIO_tell (BIO *bio)

Retrieves the current position in the BIO bio. More...

long BIO_read_filename (BIO *bio, char *name)

Opens the file name name for reading on the BIO bio. More...

long BIO_write_filename (BIO *bio, char *name)

Opens the file name name for writing on the BIO bio. More...

long BIO_append_filename (BIO *bio, char *name)

Opens the file name name for writing on the BIO bio after End-of-File (EOF). More...

long BIO_rw_filename (BIO *bio, char *name)

Opens the file name name on the BIO bio for both reading and writing. More...

int BIO_reset (BIO *bio)

Resets the BIO bio to its initial state. More...

int BIO_set_close (BIO *bio, long mode)

Sets the close mode for the BIO bio. More...

int BIO_get_close (BIO *bio)

Returns the close flag for the BIO bio. More...

int BIO_flush (BIO *bio)

Flushes any data stored in any output buffers of the BIO stack bio. More...

int BIO_end_of_msg (BIO *bio)

Tells the BIO that no more data is to be written in this message. More...

long BIO_set_verification (BIO *bio, R_VERIFY_CTX *ctx)

Sets the verification context against a BIO. More...

long BIO_set_store (BIO *bio, R_CERT_STORE_CTX *store)

Sets the certificate store context against a BIO. More...

long BIO_set_cert (BIO *bio, R_CERT *cert)

Sets the certificate against a BIO. More...

long BIO_set_asym_key (BIO *bio, R_PKEY *pkey)

Sets the asymmetric key against a BIO. More...

long BIO_set_alg (BIO *bio, R_CR_ALG_ID alg_id)

Sets the symmetric cipher algorithm against a BIO. More...

BIO_METHOD* BIO_s_file (void)

Returns a reference to the static BIO_METHOD used by a file source sink BIO. More...

BIO* BIO_new_file (char *filename, char *mode)

Creates a file BIO descriptor filename with a file opening mode of mode. More...

BIO* BIO_new_fp (FILE *stream, int close_flag)

Creates a new file BIO descriptor file pointer. More...

BIO* BIO_new (BIO_METHOD *method)

Creates a new BIO and associates the method type against the structure. More...

int BIO_free (BIO *bio)

Frees the BIO bio. More...

void BIO_free_all (BIO *bio)

Frees all BIOs in the BIO stack bio. More...

int BIO_read (BIO *bio, char *out, int outl)

Reads data through the BIO bio. More...

int BIO_gets (BIO *bio, char *in, int inl)

Reads a string from the BIO bio into the specified buffer in. More...

int BIO_write (BIO *bio, char *in, int inl)

Writes data through the BIO bio. More...

int BIO_puts (BIO *bio, char *in)

Writes the NULL terminated string contained in in to the BIO bio. More...

long BIO_ctrl (BIO *bio, int cmd, long larg, char *parg)

Provides the replaceable point for all implementation-specific behavior for the I/O. More...

BIO* BIO_push (BIO *bio, BIO *stack)

Pushes the BIO bio onto the existing BIO stack and returns a pointer to the new stack. More...

BIO* BIO_pop (BIO *bio)

Pops the uppermost BIO bio from the BIO stack and returns the remaining BIO stack. More...

BIO* BIO_find_type (BIO *bio, int type)

Returns a BIO from the stack bio with a specified type. More...

BIO* BIO_get_retry_BIO (BIO *bio, int *reason)

Walks the BIO stack bio and returns the first BIO found that has a retry error set and the reason why the operation should be retried. More...

BIO* BIO_dup_chain (BIO *in)

Iterates down the BIO stack bio and creates a new copy of each BIO. More...

long MS_CALLBACK BIO_debug_cb (BIO *bio, int cmd, char *argp, int argi, long argl, long ret)

Sets a prepared callback for the BIO structure bio to output debug information via BIO_set_cb(). More...

BIO_METHOD* BIO_s_mem (void)

Returns a reference to the static BIO_METHOD used by a memory source sink BIO.

BIO_METHOD* BIO_s_null (void)

Returns a reference to the static BIO_METHOD used by a NULL source sink BIO. More...

BIO_METHOD* BIO_f_null (void)

This section lists the Filter BIOs that may be used in a BIO stack. More...

BIO_METHOD* BIO_f_buffer (void)

Returns a reference to the static BIO_METHOD used by a buffer filter BIO. More...

int BIO_dump (BIO *bio, unsigned char *bytes, int len)

Dumps the contents of binary data buffer bytes to the BIO structure bio in hexadecimal and ASCII form, removing any trailing spaces or NULL characters. More...

int BIO_dump_format (BIO *bio, unsigned char *data, int len, int format, int separator, int indent, int wrap)

Specifies the format for dumping the contents of the BIO structure bio. More...

BIO* BIO_new_mem (void)

Creates a memory BIO where all read and write operations refer to an internal memory buffer. More...

void BIO_copy_next_retry (BIO *bio)

Copies the retry flags and reason from the next BIO in the BIO stack to this BIO bio in order to propagate the retry values up one element in the BIO stack. More...

void BIO_reference_inc (BIO *bio)

Increments the reference count for the BIO bio. More...

void BIO_set_flags (BIO *bio, int f)

Sets the flags indicating the current state of the BIO bio. More...

int BIO_get_flags (BIO *bio)

Returns the flags indicating the current state of the BIO bio. More...

void BIO_clear_flags (BIO *bio, int f)

Clears the flags used internally by the BIO bio. More...

void BIO_clear_retry_flags (BIO *bio)

Clears the flags field for BIO_FLAGS_RWS and BIO_FLAGS_SHOULD_RETRY for the BIO bio. More...

int BIO_get_retry_flags (BIO *bio)

Retrieves the settings from the retry flags field for the BIO bio. More...

int BIO_should_read (BIO *bio)

Indicates whether the last read operation should be retried for the BIO bio. More...

int BIO_should_write (BIO *bio)

Indicates whether the last write operation should be retried for the BIO bio. More...

int BIO_should_io_special (BIO *bio)

Indicates a BIO-specific retry reason caused the transitory error for the BIO bio. More...

int BIO_should_retry (BIO *bio)

Indicates whether the last I/O operation (read or write) should be retried for the BIO bio. More...

int BIO_get_retry_reason (BIO *bio)

Returns the settings from the retry reason field for the BIO bio. More...

char* BIO_method_name (BIO *bio)

Returns the name field for the method structure for the BIO bio. More...

int BIO_method_type (BIO *bio)

Returns the numeric type of the method structure for the BIO bio. More...

void BIO_set_cb (BIO *bio, BIO_CB_FUNC_T *cb)

Sets a user-defined callback for the BIO bio. More...

void BIO_set_cb_arg (BIO *bio, char *arg)

Sets an extra user-defined argument against the BIO bio that developers may use in the callback. More...

void BIO_set_bio_cb (BIO *bio, BIO_CB_FUNC_T *cb, char *arg)

Sets the BIO callback and an argument against the BIO bio. More...

char* BIO_get_cb_arg (BIO *bio)

Returns a pointer to the user-defined data for the user-defined callback that exists within the BIO bio. More...

BIO_CB_FUNC_T* BIO_get_cb (BIO *bio)

Returns the user-defined callback function for the BIO bio if a callback function is defined. More...

void BIO_set_state_cb (BIO *bio, BIO_STATE_CB_FUNC_T *cb, char *arg)

Sets the BIO state callback and an argument against the BIO bio. More...

int BIO_state_to_string (BIO *bio, int state, size_t len, char *str)

Converts the state value of the internal state machine of the BIO into a string. More...

char* BIO_get_state_cb_arg (BIO *bio)

Returns a pointer to the user-defined data for the user-defined state callback that exists within the BIO bio. More...

BIO_STATE_CB_FUNC_T* BIO_get_state_cb (BIO *bio)

Returns the user-defined state callback function for the BIO bio if a state callback function is defined. More...

int BIO_set_cb_recursive (BIO *bio, int type, void *cb, char *arg)

Sets the BIO state callback and an argument against all the BIO objects in the stack. More...

int BIO_flags_to_string (int flags, char sep, size_t len, char *str)

Converts the flags of a BIO into a string. More...

int BIO_cb_cmd_to_string (int cmd, size_t len, char *str)

Converts the information callback cmd for a BIO into a string. More...

int BIO_open_file (BIO *bio, char *name, char *mode)

Opens the file name with a file opening mode of mode. More...

int BIO_print_hex (BIO *bio, unsigned char *bytes, int len, int flags)

Prints an array of Bytes in hexadecimal format to the BIO bio. More...

int BIO_printf (BIO *bio,...)

Provides the equivalent of the standard C runtime printf function where the output is directed to the BIO structure bio with a format string. More...

Define Documentation

#define BIO_C_SET_ASYM_KEY

Set the private asymmetric key for a cryptographic message BIO. This asymmetric key is used to decrypt the symmetric key which encrypts the enveloped data content.

#define BIO_C_SET_CERT

Set the certificate of a recipient for a cryptographic message BIO. The certificate is used to determine the recipient index in the header of a PKCS#7 enveloped message.

Typedef Documentation

typedef struct bio_method_st BIO_METHOD

This structure stores pointers to functions that implement the BIO methods. Each BIO has seven methods. A NULL pointer indicates that the method is not implemented.
The methods define the behavior of an individual BIO type, and are called directly by the BIO access functions. The methods modify the general BIO behavior by replacing it with the specific behavior for the BIO sub-class.

Function Documentation

BIO_METHOD* BIO_f_buffer ( void ) ;

Returns a reference to the static BIO_METHOD used by a buffer filter BIO. The buffer filter BIO is used to store data where the next BIO in the BIO stack is non-blocking, and may not be able to read or write all requested data within a single call.

BIO_METHOD* BIO_f_null ( void ) ;

This section lists the Filter BIOs that may be used in a BIO stack. These provide data filtering prior to writing to, or after reading from, a source/sink BIO.

BIO_METHOD* BIO_s_file ( void ) ;

Returns a reference to the static BIO_METHOD used by a file source sink BIO. The file source sink BIO is only available on platforms supporting file operations.

BIO_METHOD* BIO_s_null ( ) ;

Returns a reference to the static BIO_METHOD used by a NULL source sink BIO. The NULL source sink BIO is used to discard data rather than output it. A read operation from a NULL source sink BIO does not modify the output buffer supplied.

Returns:
A BIO_METHOD reference.
See also:
BIO_new().

Data Structures
	BIO_METHOD
	This structure stores pointers to functions that implement the BIO methods. More...
	BIO
	This structure contains the data and BIO method structure. More...
Defines
#define	BIO_TYPE_FILTER
	The base type indicating that a BIO of this type modifies the data written to, or read from a source/sink BIO. More...
#define	BIO_TYPE_SOURCE_SINK
	The base type indicating that a BIO of this type takes data from a device, and/or sends data to a device (data exchange). More...
#define	BIO_TYPE_DESCRIPTOR
	The base type that may be combined with the source/sink base type to indicate that the BIO uses a file descriptor. More...
#define	BIO_TYPE_DGRAM
	The base type that may be combined with the source/sink base type to indicate that the BIO is a datagram socket.
#define	BIO_TYPE_NONE
	Indicates that the BIO does not have a defined type.
#define	BIO_TYPE_MEM
	Indicates that the BIO is a memory buffer source/sink BIO.
#define	BIO_TYPE_FILE
	Indicates that the BIO is a file pointer source/sink BIO.
#define	BIO_TYPE_FD
	Indicates that the BIO is a file descriptor source/sink BIO.
#define	BIO_TYPE_NULL
	Indicates that the BIO is a `NULL` source/sink BIO. More...
#define	BIO_TYPE_BUFFER
	Indicates that the BIO is a data buffer filter BIO. More...
#define	BIO_TYPE_BASE64
	Indicates that the BIO is a data base 64 filter BIO.
#define	BIO_TYPE_NULL_FILTER
	Indicates that the BIO is a `NULL` filter BIO. More...
#define	BIO_CTRL_RESET
	Rewinds to the start of input or output and resets the state of the BIO. More...
#define	BIO_CTRL_EOF
	Checks if the BIO has reached the End-of-File (EOF) marker.
#define	BIO_CTRL_INFO
	Retrieves extra information from the BIO. More...
#define	BIO_CTRL_SET
	Sets the BIO I/O type.
#define	BIO_CTRL_GET
	Retrieves the BIO I/O type.
#define	BIO_CTRL_PUSH
	An internal control used for BIO stack manipulation.
#define	BIO_CTRL_POP
	An internal control used for BIO stack manipulation.
#define	BIO_CTRL_GET_CLOSE
	Retrieves the state of the BIO shutdown flag used by BIO_free(). More...
#define	BIO_CTRL_SET_CLOSE
	Sets the state of the BIO shutdown flag used by BIO_free(). More...
#define	BIO_CTRL_PENDING
	Checks if there is more data buffered in the BIO be use.
#define	BIO_CTRL_FLUSH
	Flushes any remaining data from the BIO data buffer.
#define	BIO_CTRL_DUP
	Extra information to use for a duplicated BIO.
#define	BIO_CTRL_WPENDING
	Retrieves the number of Bytes in the BIO data buffer pending to write.
#define	BIO_CTRL_SET_CALLBACK
	Sets the BIO callback function.
#define	BIO_CTRL_GET_CALLBACK
	Retrieves a pointer to a BIO callback function.
#define	BIO_CTRL_SET_FILENAME
	Sets the file name to be used by the file BIO.
#define	BIO_NOCLOSE
	Indicates not to close the I/O stream on BIO_free(). More...
#define	BIO_CLOSE
	Indicates to close the I/O stream on BIO_free(). More...
#define	BIO_FLAGS_READ
	Indicates that the BIO has data to read.
#define	BIO_FLAGS_WRITE
	Indicates that the BIO has data to write.
#define	BIO_FLAGS_IO_SPECIAL
	Indicates that the BIO performs custom socket I/O. More...
#define	BIO_FLAGS_RWS
	Indicates a combination of BIO_FLAGS_READ, BIO_FLAGS_WRITE and BIO_FLAGS_IO_SPECIAL.
#define	BIO_FLAGS_SHOULD_RETRY
	Indicates whether a retry on write or read should be attempted for the BIO. More...
#define	BIO_FLAGS_FLUSH_ON_WRITE
	Indicates that the BIO should flush the data buffer on the write operation.
#define	BIO_FLAGS_EOM
	Indicates that there is no more data in the message.
#define	BIO_RR_CONNECT
	Returned from the connect BIO when a connect would have been blocked.
#define	BIO_RR_ACCEPT
	Returned from the accept BIO. More...
#define	BIO_CB_FREE
	Indicates that the BIO callback function was called during an execution of BIO_free().
#define	BIO_CB_READ
	Indicates that the BIO callback function was called during an execution of BIO_read().
#define	BIO_CB_WRITE
	Indicates that the BIO callback function was called during an execution of BIO_write().
#define	BIO_CB_PUTS
	Indicates that the BIO callback function was called during an execution of BIO_puts().
#define	BIO_CB_GETS
	Indicates that the BIO callback function was called during an execution of BIO_gets().
#define	BIO_CB_CTRL
	Indicates that the BIO callback function was called during an execution of BIO_ctrl().
#define	BIO_CB_FUNC_MASK
	Used to mask the function number of the command.
#define	BIO_CB_RETURN
	Indicates that the BIO callback function was called after the execution of the underlying operation, rather than before. More...
#define	BIO_CB_TYPE_FUNC
	This is the standard callback function. More...
#define	BIO_CB_TYPE_INFO
	This is the information callback for connections. More...
#define	BIO_CB_TYPE_STATE
	This is the state callback. More...
#define	BIO_C_NEXT_MSG
	Perform processing to prepare for the next message.
#define	BIO_C_SET_STORE
	Set the store context against the BIO filter.
#define	BIO_C_SET_VFY_CTX
	Set the verification context against the BIO filter.
#define	BIO_C_SET_EITEMS
	Set the R_EITEMS against the BIO filter.
#define	BIO_C_SET_CTX
	Set the context for further operations against the BIO filter.
#define	BIO_C_SET_CODE
	Set the OP program code against the BIO filter.
#define	BIO_C_SET_STATE_CB
	Set the state callback and argument against the BIO filter.
#define	BIO_C_GET_STATE_CB
	Retrieve the state callback and argument from the BIO filter.
#define	BIO_C_END_OF_MSG
	Indicate that all the data has been written and any post-processing should start and/or trailing data should now be put out.
#define	BIO_C_STATE_STRING
	Obtain the string corresponding to the state value passed.
#define	BIO_C_SET_PADDING_MODE
	Set the padding method for a cipher BIO.
#define	BIO_C_SET_ASYM_KEY
	Set the private asymmetric key for a cryptographic message BIO. More...
#define	BIO_C_SET_CERT
	Set the certificate of a recipient for a cryptographic message BIO. More...
#define	BIO_C_SET_ALG_ID
	Set the ID of the encryption algorithm used in encrypting the content data of an enveloped message.
#define	BIO_C_GET_PARAMS
	Get the parameters of the cryptographic algorithm.
#define	BIO_C_SET_KEY_SIZE
	Set the size (length) of the key.
#define	BIO_C_SET_EFF_BITS
	Set the effective key bits.
#define	BIO_C_SET_NO_ROUNDS
	Set the number of rounds.
#define	BIO_C_SET_WRAPPED
	Set whether the cryptographic message is wrapped.
#define	BIO_C_SET_CONTENT_TYPE
	Set the content type of the cryptographic message.
#define	BIO_C_INIT
	Initialize the BIO with the data passed in.
#define	BIO_DUMP_FORMAT_HEX
	Format the output of each Byte as two hexadecimal characters.
#define	BIO_DUMP_FORMAT_HEX_PREFIX
	Format the output of each Byte as `'0x'` (`zero-small-x`), followed by two hexadecimal characters.
#define	BIO_PRINT_HEX_REVERSE
	The BIO_print_hex() flag required for printing little-endian numbers. More...
Typedefs
typedef struct bio_st	BIO
	The BIO object type identifier.
typedef long	BIO_CB_FUNC_T (BIO bio, int cmd, char argp, int argi, long argl, long ret)
	Used for creating user-defined debugging routines or surrender functions. More...
typedef long	R_BIO_CB_FUNC_T (BIO bio, int cmd, char argp, int argi, long argl, long ret)
	Deprecated name for the BIO callback type.
typedef int	BIO_STATE_CB_FUNC_T (BIO bio, int type, int state, int ret, int flag, char cb_arg)
	The type of callback function that reports on the BIO state. More...
typedef struct bio_state_cb_st	BIO_STATE_CB
	The type used to hold the state callback and its user-defined argument for transportation.
typedef struct bio_init_st	BIO_INIT
	This structure stores the data that is required to perform initialization on a new BIO that was created from the resource list.
typedef struct bio_method_st	BIO_METHOD
	This structure stores pointers to functions that implement the BIO methods. More...
Functions
long	BIO_set_fp (BIO bio, char fp, long flags)
	Sets the file pointer fp to be used with the BIO bio. More...
long	BIO_get_fp (BIO bio, char fp)
	Returns the file pointer associated with the BIO bio. More...
int	BIO_seek (BIO *bio, long offset)
	Moves the current position in the BIO bio. More...
int	BIO_tell (BIO *bio)
	Retrieves the current position in the BIO bio. More...
long	BIO_read_filename (BIO bio, char name)
	Opens the file name name for reading on the BIO bio. More...
long	BIO_write_filename (BIO bio, char name)
	Opens the file name name for writing on the BIO bio. More...
long	BIO_append_filename (BIO bio, char name)
	Opens the file name name for writing on the BIO bio after End-of-File (EOF). More...
long	BIO_rw_filename (BIO bio, char name)
	Opens the file name name on the BIO bio for both reading and writing. More...
int	BIO_reset (BIO *bio)
	Resets the BIO bio to its initial state. More...
int	BIO_set_close (BIO *bio, long mode)
	Sets the close mode for the BIO bio. More...
int	BIO_get_close (BIO *bio)
	Returns the close flag for the BIO bio. More...
int	BIO_flush (BIO *bio)
	Flushes any data stored in any output buffers of the BIO stack bio. More...
int	BIO_end_of_msg (BIO *bio)
	Tells the BIO that no more data is to be written in this message. More...
long	BIO_set_verification (BIO bio, R_VERIFY_CTX ctx)
	Sets the verification context against a BIO. More...
long	BIO_set_store (BIO bio, R_CERT_STORE_CTX store)
	Sets the certificate store context against a BIO. More...
long	BIO_set_cert (BIO bio, R_CERT cert)
	Sets the certificate against a BIO. More...
long	BIO_set_asym_key (BIO bio, R_PKEY pkey)
	Sets the asymmetric key against a BIO. More...
long	BIO_set_alg (BIO *bio, R_CR_ALG_ID alg_id)
	Sets the symmetric cipher algorithm against a BIO. More...
BIO_METHOD*	BIO_s_file (void)
	Returns a reference to the static BIO_METHOD used by a file source sink BIO. More...
BIO*	BIO_new_file (char filename, char mode)
	Creates a file BIO descriptor filename with a file opening mode of mode. More...
BIO*	BIO_new_fp (FILE *stream, int close_flag)
	Creates a new file BIO descriptor file pointer. More...
BIO*	BIO_new (BIO_METHOD *method)
	Creates a new BIO and associates the method type against the structure. More...
int	BIO_free (BIO *bio)
	Frees the BIO bio. More...
void	BIO_free_all (BIO *bio)
	Frees all BIOs in the BIO stack bio. More...
int	BIO_read (BIO bio, char out, int outl)
	Reads data through the BIO bio. More...
int	BIO_gets (BIO bio, char in, int inl)
	Reads a string from the BIO bio into the specified buffer in. More...
int	BIO_write (BIO bio, char in, int inl)
	Writes data through the BIO bio. More...
int	BIO_puts (BIO bio, char in)
	Writes the `NULL` terminated string contained in in to the BIO bio. More...
long	BIO_ctrl (BIO bio, int cmd, long larg, char parg)
	Provides the replaceable point for all implementation-specific behavior for the I/O. More...
BIO*	BIO_push (BIO bio, BIO stack)
	Pushes the BIO bio onto the existing BIO stack and returns a pointer to the new stack. More...
BIO*	BIO_pop (BIO *bio)
	Pops the uppermost BIO bio from the BIO stack and returns the remaining BIO stack. More...
BIO*	BIO_find_type (BIO *bio, int type)
	Returns a BIO from the stack bio with a specified type. More...
BIO*	BIO_get_retry_BIO (BIO bio, int reason)
	Walks the BIO stack bio and returns the first BIO found that has a retry error set and the reason why the operation should be retried. More...
BIO*	BIO_dup_chain (BIO *in)
	Iterates down the BIO stack bio and creates a new copy of each BIO. More...
long MS_CALLBACK	BIO_debug_cb (BIO bio, int cmd, char argp, int argi, long argl, long ret)
	Sets a prepared callback for the BIO structure bio to output debug information via BIO_set_cb(). More...
BIO_METHOD*	BIO_s_mem (void)
	Returns a reference to the static BIO_METHOD used by a memory source sink BIO.
BIO_METHOD*	BIO_s_null (void)
	Returns a reference to the static BIO_METHOD used by a `NULL` source sink BIO. More...
BIO_METHOD*	BIO_f_null (void)
	This section lists the Filter BIOs that may be used in a BIO stack. More...
BIO_METHOD*	BIO_f_buffer (void)
	Returns a reference to the static BIO_METHOD used by a buffer filter BIO. More...
int	BIO_dump (BIO bio, unsigned char bytes, int len)
	Dumps the contents of binary data buffer bytes to the BIO structure bio in hexadecimal and ASCII form, removing any trailing spaces or `NULL` characters. More...
int	BIO_dump_format (BIO bio, unsigned char data, int len, int format, int separator, int indent, int wrap)
	Specifies the format for dumping the contents of the BIO structure bio. More...
BIO*	BIO_new_mem (void)
	Creates a memory BIO where all read and write operations refer to an internal memory buffer. More...
void	BIO_copy_next_retry (BIO *bio)
	Copies the retry flags and reason from the next BIO in the BIO stack to this BIO bio in order to propagate the retry values up one element in the BIO stack. More...
void	BIO_reference_inc (BIO *bio)
	Increments the reference count for the BIO bio. More...
void	BIO_set_flags (BIO *bio, int f)
	Sets the flags indicating the current state of the BIO bio. More...
int	BIO_get_flags (BIO *bio)
	Returns the flags indicating the current state of the BIO bio. More...
void	BIO_clear_flags (BIO *bio, int f)
	Clears the flags used internally by the BIO bio. More...
void	BIO_clear_retry_flags (BIO *bio)
	Clears the `flags` field for BIO_FLAGS_RWS and BIO_FLAGS_SHOULD_RETRY for the BIO bio. More...
int	BIO_get_retry_flags (BIO *bio)
	Retrieves the settings from the `retry flags` field for the BIO bio. More...
int	BIO_should_read (BIO *bio)
	Indicates whether the last read operation should be retried for the BIO bio. More...
int	BIO_should_write (BIO *bio)
	Indicates whether the last write operation should be retried for the BIO bio. More...
int	BIO_should_io_special (BIO *bio)
	Indicates a BIO-specific retry reason caused the transitory error for the BIO bio. More...
int	BIO_should_retry (BIO *bio)
	Indicates whether the last I/O operation (read or write) should be retried for the BIO bio. More...
int	BIO_get_retry_reason (BIO *bio)
	Returns the settings from the retry reason field for the BIO bio. More...
char*	BIO_method_name (BIO *bio)
	Returns the name field for the method structure for the BIO bio. More...
int	BIO_method_type (BIO *bio)
	Returns the numeric type of the method structure for the BIO bio. More...
void	BIO_set_cb (BIO bio, BIO_CB_FUNC_T cb)
	Sets a user-defined callback for the BIO bio. More...
void	BIO_set_cb_arg (BIO bio, char arg)
	Sets an extra user-defined argument against the BIO bio that developers may use in the callback. More...
void	BIO_set_bio_cb (BIO bio, BIO_CB_FUNC_T cb, char *arg)
	Sets the BIO callback and an argument against the BIO bio. More...
char*	BIO_get_cb_arg (BIO *bio)
	Returns a pointer to the user-defined data for the user-defined callback that exists within the BIO bio. More...
BIO_CB_FUNC_T*	BIO_get_cb (BIO *bio)
	Returns the user-defined callback function for the BIO bio if a callback function is defined. More...
void	BIO_set_state_cb (BIO bio, BIO_STATE_CB_FUNC_T cb, char *arg)
	Sets the BIO state callback and an argument against the BIO bio. More...
int	BIO_state_to_string (BIO bio, int state, size_t len, char str)
	Converts the state value of the internal state machine of the BIO into a string. More...
char*	BIO_get_state_cb_arg (BIO *bio)
	Returns a pointer to the user-defined data for the user-defined state callback that exists within the BIO bio. More...
BIO_STATE_CB_FUNC_T*	BIO_get_state_cb (BIO *bio)
	Returns the user-defined state callback function for the BIO bio if a state callback function is defined. More...
int	BIO_set_cb_recursive (BIO bio, int type, void cb, char *arg)
	Sets the BIO state callback and an argument against all the BIO objects in the stack. More...
int	BIO_flags_to_string (int flags, char sep, size_t len, char *str)
	Converts the flags of a BIO into a string. More...
int	BIO_cb_cmd_to_string (int cmd, size_t len, char *str)
	Converts the information callback cmd for a BIO into a string. More...
int	BIO_open_file (BIO bio, char name, char *mode)
	Opens the file name with a file opening mode of mode. More...
int	BIO_print_hex (BIO bio, unsigned char bytes, int len, int flags)
	Prints an array of Bytes in hexadecimal format to the BIO bio. More...
int	BIO_printf (BIO *bio,...)
	Provides the equivalent of the standard C runtime `printf` function where the output is directed to the BIO structure bio with a format string. More...