der.h File Reference

DER image format. More...

#include <stdint.h>
#include <ipxe/asn1.h>
#include <ipxe/image.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
int	der_asn1 (const void *data, size_t len, size_t offset, struct asn1_cursor **cursor)
	Extract ASN.1 object from DER data. More...
struct image_type der_image_type	__image_type (PROBE_NORMAL)

Detailed Description

DER image format.

Definition in file der.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

der_asn1()

int der_asn1	(	const void *	data,
		size_t	len,
		size_t	offset,
		struct asn1_cursor **	cursor
	)

Extract ASN.1 object from DER data.

Parameters

data	DER data
len	Length of DER data
offset	Offset within data
cursor	ASN.1 cursor to fill in

Return values

next	Offset to next object, or negative error

The caller is responsible for eventually calling free() on the allocated ASN.1 cursor.

Definition at line 52 of file der.c.

                                             {
        size_t remaining;
        void *raw;

        /* Sanity check */
        assert ( offset <= len );
        remaining = ( len - offset );

        /* Allocate cursor and data buffer */
        *cursor = malloc ( sizeof ( **cursor ) + remaining );
        if ( ! *cursor )
                return -ENOMEM;
        raw = ( ( ( void * ) *cursor ) + sizeof ( **cursor ) );

        /* Populate cursor and data buffer */
        (*cursor)->data = raw;
        (*cursor)->len = remaining;
        memcpy ( raw, ( data + offset ), remaining );

        /* Shrink cursor */
        asn1_shrink_any ( *cursor );

        return ( offset + (*cursor)->len );
}

References asn1_shrink_any(), assert(), data, ENOMEM, len, malloc(), memcpy(), offset, and raw.

Referenced by der_image_asn1(), and efisig_asn1().

__image_type()

struct image_type der_image_type __image_type

(

PROBE_NORMAL

)