ASN.1 decoder

Collaboration diagram for ASN.1 decoder:

Data Structures
struct	asn1_dec_state_t
struct	asn1_result_t

Macros
#define	ASN1_SEQUENCE   (0x30)
#define	ASN1_INTEGER   (0x02)
#define	ASN1_LENGTH(x)   ((uint8_t)((x) >> 0)), ((uint8_t)((x) >> 8)), ((uint8_t)((x) >> 16)), ((uint8_t)((x) >> 24))

Enumerations

Functions
void	asn1_dec_init (struct asn1_dec_state_t *s)
enum asn1_rc_t	asn1_dec (struct asn1_dec_state_t *s, const uint8_t *tplt, struct asn1_result_t *result, uint8_t ch)

Detailed Description

EVE ASN.1 decoder

Macro Definition Documentation

#define ASN1_SEQUENCE   (0x30)

Search for a SEQUENCE in ASN.1 data

Definition at line 51 of file asn1.h.

#define ASN1_INTEGER   (0x02)

Search for a INTEGER in the ASN.1 data

Definition at line 55 of file asn1.h.

#define ASN1_LENGTH

(

x

)

((uint8_t)((x) >> 0)), ((uint8_t)((x) >> 8)), ((uint8_t)((x) >> 16)), ((uint8_t)((x) >> 24))

Encodes length of the integer

Definition at line 59 of file asn1.h.

Enumeration Type Documentation

enum asn1_rc_t

ASN.1 decoder return codes

Enumerator
ASN1_STATE_IDLE	Processing of the ASN.1 data was not finished yet
ASN1_STATE_RDY	Processing of the ASN.1 data was finished according to template
ASN1_STATE_ERROR	The ASN.1 data or template is not valid

Definition at line 63 of file asn1.h.

enum asn1_state_t

ASN.1 decoder state type, used internally by the decoder

Definition at line 71 of file asn1.h.

Function Documentation

void asn1_dec_init

(

struct asn1_dec_state_t *

s

)

Initializes the ASN.1 decoder structure.

Parameters

s	pointer to the ASN.1 decoder structure

enum asn1_rc_t asn1_dec	(	struct asn1_dec_state_t *	s,
		const uint8_t *	tplt,
		struct asn1_result_t *	result,
		uint8_t	ch
	)

Feeds the encoder with a single character.

Parameters

s	pointer to the base64 encoder structure
tplt	parsing template, zero-terminated string of ASN1_XXX macroes
result	parsing result desctiptors, an array of asn1_result_t elements
ch	the character to be fed to the encoder

Returns

ASN1_STATE_ERROR when the character was not accepted

ASN1_STATE_IDLE whan the character was accepted, but the processing was not finished

ASN1_STATE_RDY whan the character was accepted and result is available in the result array