Documentation

Documentation

Includes

config.h

#include "config.h"
#include "config.h"

MBEDTLS_CONFIG_FILE

#include MBEDTLS_CONFIG_FILE
#include MBEDTLS_CONFIG_FILE

asn1.h

#include "asn1.h"
#include "asn1.h"

Macros

Marco MBEDTLS_ASN1_WRITE_H

#define MBEDTLS_ASN1_WRITE_H


      

Marco MBEDTLS_ASN1_CHK_ADD(g, f)

#define MBEDTLS_ASN1_CHK_ADD(g, f)                     \
   do                                                 \
   {                                                  \
       if( ( ret = (f) ) < 0 )                        \
           return( ret );                             \
       else                                           \
           (g) += ret;                                \
   } while( 0 )

      

Functions

Func mbedtls_asn1_write_len

int mbedtls_asn1_write_len( unsigned char **p, unsigned char *start,
                           size_t len );
/**
 * \brief           Write a length field in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param len       The length value to write.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */

Func mbedtls_asn1_write_tag

int mbedtls_asn1_write_tag( unsigned char **p, unsigned char *start,
                           unsigned char tag );
/**
 * \brief           Write an ASN.1 tag in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param tag       The tag to write.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */

Func mbedtls_asn1_write_raw_buffer

int mbedtls_asn1_write_raw_buffer( unsigned char **p, unsigned char *start,
                                  const unsigned char *buf, size_t size );
/**
 * \brief           Write raw buffer data.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param buf       The data buffer to write.
 * \param size      The length of the data buffer.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */

Func mbedtls_asn1_write_mpi

int mbedtls_asn1_write_mpi( unsigned char **p, unsigned char *start,
                           const mbedtls_mpi *X );
/**
 * \brief           Write a arbitrary-precision number (#MBEDTLS_ASN1_INTEGER)
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param X         The MPI to write.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */

Func mbedtls_asn1_write_null

int mbedtls_asn1_write_null( unsigned char **p, unsigned char *start );
/**
 * \brief           Write a NULL tag (#MBEDTLS_ASN1_NULL) with zero data
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */

Func mbedtls_asn1_write_oid

int mbedtls_asn1_write_oid( unsigned char **p, unsigned char *start,
                           const char *oid, size_t oid_len );
/**
 * \brief           Write an OID tag (#MBEDTLS_ASN1_OID) and data
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param oid       The OID to write.
 * \param oid_len   The length of the OID.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */

Func mbedtls_asn1_write_algorithm_identifier

int mbedtls_asn1_write_algorithm_identifier( unsigned char **p,
                                            unsigned char *start,
                                            const char *oid, size_t oid_len,
                                            size_t par_len );
/**
 * \brief           Write an AlgorithmIdentifier sequence in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param oid       The OID of the algorithm to write.
 * \param oid_len   The length of the algorithm's OID.
 * \param par_len   The length of the parameters, which must be already written.
 *                  If 0, NULL parameters are added
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */

Func mbedtls_asn1_write_bool

int mbedtls_asn1_write_bool( unsigned char **p, unsigned char *start,
                            int boolean );
/**
 * \brief           Write a boolean tag (#MBEDTLS_ASN1_BOOLEAN) and value
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param boolean   The boolean value to write, either \c 0 or \c 1.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */

Func mbedtls_asn1_write_int

int mbedtls_asn1_write_int( unsigned char **p, unsigned char *start, int val );
/**
 * \brief           Write an int tag (#MBEDTLS_ASN1_INTEGER) and value
 *                  in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param val       The integer value to write.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative \c MBEDTLS_ERR_ASN1_XXX error code on failure.
 */

Func mbedtls_asn1_write_tagged_string

int mbedtls_asn1_write_tagged_string( unsigned char **p, unsigned char *start,
                                     int tag, const char *text,
                                     size_t text_len );
/**
 * \brief           Write a string in ASN.1 format using a specific
 *                  string encoding tag.

 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param tag       The string encoding tag to write, e.g.
 *                  #MBEDTLS_ASN1_UTF8_STRING.
 * \param text      The string to write.
 * \param text_len  The length of \p text in bytes (which might
 *                  be strictly larger than the number of characters).
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */

Func mbedtls_asn1_write_printable_string

int mbedtls_asn1_write_printable_string( unsigned char **p,
                                        unsigned char *start,
                                        const char *text, size_t text_len );
/**
 * \brief           Write a string in ASN.1 format using the PrintableString
 *                  string encoding tag (#MBEDTLS_ASN1_PRINTABLE_STRING).
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param text      The string to write.
 * \param text_len  The length of \p text in bytes (which might
 *                  be strictly larger than the number of characters).
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */

Func mbedtls_asn1_write_utf8_string

int mbedtls_asn1_write_utf8_string( unsigned char **p, unsigned char *start,
                                   const char *text, size_t text_len );
/**
 * \brief           Write a UTF8 string in ASN.1 format using the UTF8String
 *                  string encoding tag (#MBEDTLS_ASN1_PRINTABLE_STRING).
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param text      The string to write.
 * \param text_len  The length of \p text in bytes (which might
 *                  be strictly larger than the number of characters).
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */

Func mbedtls_asn1_write_ia5_string

int mbedtls_asn1_write_ia5_string( unsigned char **p, unsigned char *start,
                                  const char *text, size_t text_len );
/**
 * \brief           Write a string in ASN.1 format using the IA5String
 *                  string encoding tag (#MBEDTLS_ASN1_IA5_STRING).
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param text      The string to write.
 * \param text_len  The length of \p text in bytes (which might
 *                  be strictly larger than the number of characters).
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */

Func mbedtls_asn1_write_bitstring

int mbedtls_asn1_write_bitstring( unsigned char **p, unsigned char *start,
                                 const unsigned char *buf, size_t bits );
/**
 * \brief           Write a bitstring tag (#MBEDTLS_ASN1_BIT_STRING) and
 *                  value in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param buf       The bitstring to write.
 * \param bits      The total number of bits in the bitstring.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */

Func mbedtls_asn1_write_octet_string

int mbedtls_asn1_write_octet_string( unsigned char **p, unsigned char *start,
                                    const unsigned char *buf, size_t size );
/**
 * \brief           Write an octet string tag (#MBEDTLS_ASN1_OCTET_STRING)
 *                  and value in ASN.1 format.
 *
 * \note            This function works backwards in data buffer.
 *
 * \param p         The reference to the current position pointer.
 * \param start     The start of the buffer, for bounds-checking.
 * \param buf       The buffer holding the data to write.
 * \param size      The length of the data buffer \p buf.
 *
 * \return          The number of bytes written to \p p on success.
 * \return          A negative error code on failure.
 */

Vars

Variable mbedtls_asn1_named_data

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 );
/**
 * \brief           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!
 *
 * \param list      The pointer to the location of the head of the list to seek
 *                  through (will be updated in case of a new entry).
 * \param oid       The OID to look for.
 * \param oid_len   The size of the OID.
 * \param val       The data to store (can be \c NULL if you want to fill
 *                  it by hand).
 * \param val_len   The minimum length of the data buffer needed.
 *
 * \return          A pointer to the new / existing entry on success.
 * \return          \c NULL if if there was a memory allocation error.
 */

Consts

Types

Typedefs