ASN.1 Support

Internal API for CoAP ASN.1 handling. More...

Collaboration diagram for ASN.1 Support:

Typedefs
typedef int(*	asn1_validate) (const uint8_t *data, size_t size)
	Callback to validate the asn1 tag and data. More...

Enumerations
enum	coap_asn1_tag_t {   COAP_ASN1_NONE = 0 , COAP_ASN1_INTEGER = 2 , COAP_ASN1_BITSTRING = 3 , COAP_ASN1_OCTETSTRING = 4 ,   COAP_ASN1_IDENTIFIER = 6 }

Functions
size_t	asn1_len (const uint8_t **ptr)
	Get the asn1 length from the current ptr. More...
coap_asn1_tag_t	asn1_tag_c (const uint8_t **ptr, int *constructed, int *cls)
	Get the asn1 tag from the current ptr. More...
coap_binary_t *	get_asn1_tag (coap_asn1_tag_t ltag, const uint8_t *ptr, size_t tlen, asn1_validate validate)
	Get the asn1 tag and data from the current ptr. More...
coap_binary_t *	get_asn1_spki (const uint8_t *data, size_t size)
	Abstract SPKI public key from the ASN1. More...

Detailed Description

Internal API for CoAP ASN.1 handling.

Typedef Documentation

asn1_validate

typedef int(* asn1_validate) (const uint8_t *data, size_t size)

Callback to validate the asn1 tag and data.

Internal function.

Parameters

data	The start of the tag and data
size	The size of the tag and data

Returns

1 if pass, else 0 if fail

Definition at line 47 of file coap_asn1_internal.h.

Enumeration Type Documentation

coap_asn1_tag_t

enum coap_asn1_tag_t

Enumerator
COAP_ASN1_NONE
COAP_ASN1_INTEGER
COAP_ASN1_BITSTRING
COAP_ASN1_OCTETSTRING
COAP_ASN1_IDENTIFIER

Definition at line 29 of file coap_asn1_internal.h.

Function Documentation

asn1_len()

size_t asn1_len

(

const uint8_t **

ptr

)

Get the asn1 length from the current ptr.

Internal function.

Parameters

ptr	The current asn.1 object length pointer

Returns

The length of the asn.1 object. ptr is updated to be after the length.

Definition at line 19 of file coap_asn1.c.

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asn1_tag_c()

coap_asn1_tag_t asn1_tag_c	(	const uint8_t **	ptr,
		int *	constructed,
		int *	cls
	)

Get the asn1 tag from the current ptr.

Internal function.

Parameters

ptr	The current asn.1 object tag pointer
constructed	1 if current tag is constructed
cls	The current class of the tag

Returns

The tag value.ptr is updated to be after the tag.

Definition at line 38 of file coap_asn1.c.

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get_asn1_spki()

coap_binary_t * get_asn1_spki	(	const uint8_t *	data,
		size_t	size
	)

Abstract SPKI public key from the ASN1.

Internal function.

Parameters

data	Pointer to ASN1 object containing EC Private Key
size	Length of ASN1 object

Returns

The publick key (to be freed off by caller) or NULL if not found

Definition at line 122 of file coap_asn1.c.

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get_asn1_tag()

coap_binary_t * get_asn1_tag	(	coap_asn1_tag_t	ltag,
		const uint8_t *	ptr,
		size_t	tlen,
		asn1_validate	validate
	)

Get the asn1 tag and data from the current ptr.

Internal function.

Parameters

ltag	The tag to look for
ptr	The current asn.1 object pointer
tlen	The remaining size oof the asn.1 data
validate	Call validate to verify tag data or NULL

Returns

The asn.1 tag and data (to be freed off by caller) or NULL if not found

Definition at line 65 of file coap_asn1.c.

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