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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 mbedtls_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 mbedtls_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 mbedtls_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 mbedtls_asn1_write_mpi (unsigned char **p, unsigned char *start, const mbedtls_mpi *X)
 Write a big number (MBEDTLS_ASN1_INTEGER) in ASN.1 format Note: function works backwards in data buffer.
int mbedtls_asn1_write_null (unsigned char **p, unsigned char *start)
 Write a NULL tag (MBEDTLS_ASN1_NULL) with zero data in ASN.1 format Note: function works backwards in data buffer.
int mbedtls_asn1_write_oid (unsigned char **p, unsigned char *start, const char *oid, size_t oid_len)
 Write an OID tag (MBEDTLS_ASN1_OID) and data in ASN.1 format Note: function works backwards in data buffer.
int mbedtls_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 mbedtls_asn1_write_bool (unsigned char **p, unsigned char *start, int boolean)
 Write a boolean tag (MBEDTLS_ASN1_BOOLEAN) and value in ASN.1 format Note: function works backwards in data buffer.
int mbedtls_asn1_write_int (unsigned char **p, unsigned char *start, int val)
 Write an int tag (MBEDTLS_ASN1_INTEGER) and value in ASN.1 format Note: function works backwards in data buffer.
int mbedtls_asn1_write_printable_string (unsigned char **p, unsigned char *start, const char *text, size_t text_len)
 Write a printable string tag (MBEDTLS_ASN1_PRINTABLE_STRING) and value in ASN.1 format Note: function works backwards in data buffer.
int mbedtls_asn1_write_ia5_string (unsigned char **p, unsigned char *start, const char *text, size_t text_len)
 Write an IA5 string tag (MBEDTLS_ASN1_IA5_STRING) and value in ASN.1 format Note: function works backwards in data buffer.
int mbedtls_asn1_write_bitstring (unsigned char **p, unsigned char *start, const unsigned char *buf, size_t bits)
 Write a bitstring tag (MBEDTLS_ASN1_BIT_STRING) and value in ASN.1 format Note: function works backwards in data buffer.
int mbedtls_asn1_write_octet_string (unsigned char **p, unsigned char *start, const unsigned char *buf, size_t size)
 Write an octet string tag (MBEDTLS_ASN1_OCTET_STRING) and value in ASN.1 format Note: function works backwards in data buffer.
mbedtls_asn1_named_data * mbedtls_asn1_store_named_data (mbedtls_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) 2006-2015, ARM Limited, All Rights Reserved SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

This file is part of mbed TLS (https://tls.mbed.org)

Definition in file asn1write.h.

Function Documentation

mbedtls_asn1_named_data* mbedtls_asn1_store_named_data ( mbedtls_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 304 of file asn1write.c.

int mbedtls_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 165 of file asn1write.c.

int mbedtls_asn1_write_bitstring ( unsigned char **  p,
unsigned char *  start,
const unsigned char *  buf,
size_t  bits 
)

Write a bitstring tag (MBEDTLS_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 263 of file asn1write.c.

int mbedtls_asn1_write_bool ( unsigned char **  p,
unsigned char *  start,
int  boolean 
)

Write a boolean tag (MBEDTLS_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 186 of file asn1write.c.

int mbedtls_asn1_write_ia5_string ( unsigned char **  p,
unsigned char *  start,
const char *  text,
size_t  text_len 
)

Write an IA5 string tag (MBEDTLS_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 248 of file asn1write.c.

int mbedtls_asn1_write_int ( unsigned char **  p,
unsigned char *  start,
int  val 
)

Write an int tag (MBEDTLS_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 203 of file asn1write.c.

int mbedtls_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 42 of file asn1write.c.

int mbedtls_asn1_write_mpi ( unsigned char **  p,
unsigned char *  start,
const mbedtls_mpi *  X 
)

Write a big number (MBEDTLS_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 101 of file asn1write.c.

int mbedtls_asn1_write_null ( unsigned char **  p,
unsigned char *  start 
)

Write a NULL tag (MBEDTLS_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 138 of file asn1write.c.

int mbedtls_asn1_write_octet_string ( unsigned char **  p,
unsigned char *  start,
const unsigned char *  buf,
size_t  size 
)

Write an octet string tag (MBEDTLS_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 290 of file asn1write.c.

int mbedtls_asn1_write_oid ( unsigned char **  p,
unsigned char *  start,
const char *  oid,
size_t  oid_len 
)

Write an OID tag (MBEDTLS_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 151 of file asn1write.c.

int mbedtls_asn1_write_printable_string ( unsigned char **  p,
unsigned char *  start,
const char *  text,
size_t  text_len 
)

Write a printable string tag (MBEDTLS_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 233 of file asn1write.c.

int mbedtls_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 85 of file asn1write.c.

int mbedtls_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 75 of file asn1write.c.

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