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asn1write.h File Reference
Functions

asn1write.h File Reference

ASN.1 buffer writing functionality. More...

Go to the source code of this file.

Functions

int asn1_write_len (unsigned char **p, unsigned char *start, size_t len)
 Write a length field in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_tag (unsigned char **p, unsigned char *start, unsigned char tag)
 Write a ASN.1 tag in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_raw_buffer (unsigned char **p, unsigned char *start, const unsigned char *buf, size_t size)
 Write raw buffer data Note: function works backwards in data buffer.
int asn1_write_mpi (unsigned char **p, unsigned char *start, mpi *X)
 Write a big number (ASN1_INTEGER) in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_null (unsigned char **p, unsigned char *start)
 Write a NULL tag (ASN1_NULL) with zero data in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_oid (unsigned char **p, unsigned char *start, const char *oid, size_t oid_len)
 Write an OID tag (ASN1_OID) and data in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_algorithm_identifier (unsigned char **p, unsigned char *start, const char *oid, size_t oid_len, size_t par_len)
 Write an AlgorithmIdentifier sequence in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_bool (unsigned char **p, unsigned char *start, int boolean)
 Write a boolean tag (ASN1_BOOLEAN) and value in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_int (unsigned char **p, unsigned char *start, int val)
 Write an int tag (ASN1_INTEGER) and value in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_printable_string (unsigned char **p, unsigned char *start, const char *text, size_t text_len)
 Write a printable string tag (ASN1_PRINTABLE_STRING) and value in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_ia5_string (unsigned char **p, unsigned char *start, const char *text, size_t text_len)
 Write an IA5 string tag (ASN1_IA5_STRING) and value in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_bitstring (unsigned char **p, unsigned char *start, const unsigned char *buf, size_t bits)
 Write a bitstring tag (ASN1_BIT_STRING) and value in ASN.1 format Note: function works backwards in data buffer.
int asn1_write_octet_string (unsigned char **p, unsigned char *start, const unsigned char *buf, size_t size)
 Write an octet string tag (ASN1_OCTET_STRING) and value in ASN.1 format Note: function works backwards in data buffer.
asn1_named_data * asn1_store_named_data (asn1_named_data **list, const char *oid, size_t oid_len, const unsigned char *val, size_t val_len)
 Create or find a specific named_data entry for writing in a sequence or list based on the OID.

Detailed Description

ASN.1 buffer writing functionality.

Copyright (C) 2006-2014, Brainspark B.V.

This file is part of PolarSSL (http://www.polarssl.org) Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>

All rights reserved.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Definition in file asn1write.h.

Function Documentation

asn1_named_data* asn1_store_named_data ( asn1_named_data **  list,
const char *  oid,
size_t  oid_len,
const unsigned char *  val,
size_t  val_len 
)

Create or find a specific named_data entry for writing in a sequence or list based on the OID.

If not already in there, a new entry is added to the head of the list. Warning: Destructive behaviour for the val data!

Parameters:
listPointer to the location of the head of the list to seek through (will be updated in case of a new entry)
oidThe OID to look for
oid_lenSize of the OID
valData to store (can be NULL if you want to fill it by hand)
val_lenMinimum length of the data buffer needed
Returns:
NULL if if there was a memory allocation error, or a pointer to the new / existing entry.

Definition at line 306 of file asn1write.c.

int asn1_write_algorithm_identifier ( unsigned char **  p,
unsigned char *  start,
const char *  oid,
size_t  oid_len,
size_t  par_len 
)

Write an AlgorithmIdentifier sequence in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
oidthe OID of the algorithm
oid_lenlength of the OID
par_lenlength of parameters, which must be already written. If 0, NULL parameters are added
Returns:
the length written or a negative error code

Definition at line 167 of file asn1write.c.

int asn1_write_bitstring ( unsigned char **  p,
unsigned char *  start,
const unsigned char *  buf,
size_t  bits 
)

Write a bitstring tag (ASN1_BIT_STRING) and value in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
bufthe bitstring
bitsthe total number of bits in the bitstring
Returns:
the length written or a negative error code

Definition at line 265 of file asn1write.c.

int asn1_write_bool ( unsigned char **  p,
unsigned char *  start,
int  boolean 
)

Write a boolean tag (ASN1_BOOLEAN) and value in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
boolean0 or 1
Returns:
the length written or a negative error code

Definition at line 188 of file asn1write.c.

int asn1_write_ia5_string ( unsigned char **  p,
unsigned char *  start,
const char *  text,
size_t  text_len 
)

Write an IA5 string tag (ASN1_IA5_STRING) and value in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
textthe text to write
text_lenlength of the text
Returns:
the length written or a negative error code

Definition at line 250 of file asn1write.c.

int asn1_write_int ( unsigned char **  p,
unsigned char *  start,
int  val 
)

Write an int tag (ASN1_INTEGER) and value in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
valthe integer value
Returns:
the length written or a negative error code

Definition at line 205 of file asn1write.c.

int asn1_write_len ( unsigned char **  p,
unsigned char *  start,
size_t  len 
)

Write a length field in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
lenthe length to write
Returns:
the length written or a negative error code

Definition at line 44 of file asn1write.c.

int asn1_write_mpi ( unsigned char **  p,
unsigned char *  start,
mpi *  X 
)

Write a big number (ASN1_INTEGER) in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
Xthe MPI to write
Returns:
the length written or a negative error code

Definition at line 103 of file asn1write.c.

int asn1_write_null ( unsigned char **  p,
unsigned char *  start 
)

Write a NULL tag (ASN1_NULL) with zero data in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
Returns:
the length written or a negative error code

Definition at line 140 of file asn1write.c.

int asn1_write_octet_string ( unsigned char **  p,
unsigned char *  start,
const unsigned char *  buf,
size_t  size 
)

Write an octet string tag (ASN1_OCTET_STRING) and value in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
bufdata buffer to write
sizelength of the data buffer
Returns:
the length written or a negative error code

Definition at line 292 of file asn1write.c.

int asn1_write_oid ( unsigned char **  p,
unsigned char *  start,
const char *  oid,
size_t  oid_len 
)

Write an OID tag (ASN1_OID) and data in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
oidthe OID to write
oid_lenlength of the OID
Returns:
the length written or a negative error code

Definition at line 153 of file asn1write.c.

int asn1_write_printable_string ( unsigned char **  p,
unsigned char *  start,
const char *  text,
size_t  text_len 
)

Write a printable string tag (ASN1_PRINTABLE_STRING) and value in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
textthe text to write
text_lenlength of the text
Returns:
the length written or a negative error code

Definition at line 235 of file asn1write.c.

int asn1_write_raw_buffer ( unsigned char **  p,
unsigned char *  start,
const unsigned char *  buf,
size_t  size 
)

Write raw buffer data Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
bufdata buffer to write
sizelength of the data buffer
Returns:
the length written or a negative error code

Definition at line 87 of file asn1write.c.

int asn1_write_tag ( unsigned char **  p,
unsigned char *  start,
unsigned char  tag 
)

Write a ASN.1 tag in ASN.1 format Note: function works backwards in data buffer.

Parameters:
preference to current position pointer
startstart of the buffer (for bounds-checking)
tagthe tag to write
Returns:
the length written or a negative error code

Definition at line 77 of file asn1write.c.

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