172 lines
6.0 KiB
C
172 lines
6.0 KiB
C
/*-
|
|
* Copyright (c) 2004-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
|
|
* Redistribution and modifications are permitted subject to BSD license.
|
|
*/
|
|
/*
|
|
* Application-level ASN.1 callbacks.
|
|
*/
|
|
#ifndef ASN_APPLICATION_H
|
|
#define ASN_APPLICATION_H
|
|
|
|
#include "asn_system.h" /* for platform-dependent types */
|
|
#include "asn_codecs.h" /* for ASN.1 codecs specifics */
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* A selection of ASN.1 Transfer Syntaxes to use with generalized
|
|
* encoders and decoders declared further in this .h file.
|
|
*/
|
|
enum asn_transfer_syntax {
|
|
/* Avoid appearance of a default transfer syntax. */
|
|
ATS_INVALID = 0,
|
|
/* Plaintext output (not conforming to any standard), for debugging. */
|
|
ATS_NONSTANDARD_PLAINTEXT,
|
|
/* Returns a randomly generated structure. */
|
|
ATS_RANDOM,
|
|
/*
|
|
* X.690:
|
|
* BER: Basic Encoding Rules.
|
|
* DER: Distinguished Encoding Rules.
|
|
* CER: Canonical Encoding Rules.
|
|
* DER and CER are more strict variants of BER.
|
|
*/
|
|
ATS_BER,
|
|
ATS_DER,
|
|
ATS_CER, /* Only decoding is supported */
|
|
/*
|
|
* X.696:
|
|
* OER: Octet Encoding Rules.
|
|
* CANONICAL-OER is a more strict variant of BASIC-OER.
|
|
*/
|
|
ATS_BASIC_OER,
|
|
ATS_CANONICAL_OER,
|
|
/*
|
|
* X.691:
|
|
* PER: Packed Encoding Rules.
|
|
* CANONICAL-PER is a more strict variant of BASIC-PER.
|
|
* NOTE: Produces or consumes a complete encoding (X.691 (08/2015) #11.1).
|
|
*/
|
|
ATS_UNALIGNED_BASIC_PER,
|
|
ATS_UNALIGNED_CANONICAL_PER,
|
|
ATS_ALIGNED_BASIC_PER,
|
|
ATS_ALIGNED_CANONICAL_PER,
|
|
/*
|
|
* X.693:
|
|
* XER: XML Encoding Rules.
|
|
* CANONICAL-XER is a more strict variant of BASIC-XER.
|
|
*/
|
|
ATS_BASIC_XER,
|
|
ATS_CANONICAL_XER
|
|
};
|
|
|
|
/*
|
|
* A generic encoder for any supported transfer syntax.
|
|
* RETURN VALUES:
|
|
* The (.encoded) field of the return value is REDEFINED to mean the following:
|
|
* >=0: The computed size of the encoded data. Can exceed the (buffer_size).
|
|
* -1: Error encoding the structure. See the error code in (errno):
|
|
* EINVAL: Incorrect parameters to the function, such as NULLs.
|
|
* ENOENT: Encoding transfer syntax is not defined (for this type).
|
|
* EBADF: The structure has invalid form or content constraint failed.
|
|
* The (.failed_type) and (.structure_ptr) MIGHT be set to the appropriate
|
|
* values at the place of failure, if at all possible.
|
|
* WARNING: The (.encoded) field of the return value can exceed the buffer_size.
|
|
* This is similar to snprintf(3) contract which might return values
|
|
* greater than the buffer size.
|
|
*/
|
|
asn_enc_rval_t asn_encode_to_buffer(
|
|
const asn_codec_ctx_t *opt_codec_parameters, /* See asn_codecs.h */
|
|
enum asn_transfer_syntax,
|
|
const struct asn_TYPE_descriptor_s *type_to_encode,
|
|
const void *structure_to_encode, void *buffer, size_t buffer_size);
|
|
|
|
/*
|
|
* A variant of asn_encode_to_buffer() with automatically allocated buffer.
|
|
* RETURN VALUES:
|
|
* On success, returns a newly allocated (.buffer) containing the whole message.
|
|
* The message size is returned in (.result.encoded).
|
|
* On failure:
|
|
* (.buffer) is NULL,
|
|
* (.result.encoded) as in asn_encode_to_buffer(),
|
|
* The errno codes as in asn_encode_to_buffer(), plus the following:
|
|
* ENOMEM: Memory allocation failed due to system or internal limits.
|
|
* The user is responsible for freeing the (.buffer).
|
|
*/
|
|
typedef struct asn_encode_to_new_buffer_result_s {
|
|
void *buffer; /* NULL if failed to encode. */
|
|
asn_enc_rval_t result;
|
|
} asn_encode_to_new_buffer_result_t;
|
|
asn_encode_to_new_buffer_result_t asn_encode_to_new_buffer(
|
|
const asn_codec_ctx_t *opt_codec_parameters, /* See asn_codecs.h */
|
|
enum asn_transfer_syntax,
|
|
const struct asn_TYPE_descriptor_s *type_to_encode,
|
|
const void *structure_to_encode);
|
|
|
|
|
|
/*
|
|
* Generic type of an application-defined callback to return various
|
|
* types of data to the application.
|
|
* EXPECTED RETURN VALUES:
|
|
* -1: Failed to consume bytes. Abort the mission.
|
|
* Non-negative return values indicate success, and ignored.
|
|
*/
|
|
typedef int(asn_app_consume_bytes_f)(const void *buffer, size_t size,
|
|
void *application_specific_key);
|
|
|
|
|
|
/*
|
|
* A generic encoder for any supported transfer syntax.
|
|
* Returns the comprehensive encoding result descriptor (see asn_codecs.h).
|
|
* RETURN VALUES:
|
|
* The negative (.encoded) field of the return values is accompanied with the
|
|
* following error codes (errno):
|
|
* EINVAL: Incorrect parameters to the function, such as NULLs.
|
|
* ENOENT: Encoding transfer syntax is not defined (for this type).
|
|
* EBADF: The structure has invalid form or content constraint failed.
|
|
* EIO: The (callback) has returned negative value during encoding.
|
|
*/
|
|
asn_enc_rval_t asn_encode(
|
|
const asn_codec_ctx_t *opt_codec_parameters, /* See asn_codecs.h */
|
|
enum asn_transfer_syntax,
|
|
const struct asn_TYPE_descriptor_s *type_to_encode,
|
|
const void *structure_to_encode,
|
|
asn_app_consume_bytes_f *callback, void *callback_key);
|
|
|
|
|
|
/*
|
|
* A generic decoder for any supported transfer syntax.
|
|
*/
|
|
asn_dec_rval_t asn_decode(
|
|
const asn_codec_ctx_t *opt_codec_parameters, enum asn_transfer_syntax,
|
|
const struct asn_TYPE_descriptor_s *type_to_decode,
|
|
void **structure_ptr, /* Pointer to a target structure's pointer */
|
|
const void *buffer, /* Data to be decoded */
|
|
size_t size /* Size of that buffer */
|
|
);
|
|
|
|
|
|
/*
|
|
* A callback of this type is called whenever constraint validation fails
|
|
* on some ASN.1 type. See "constraints.h" for more details on constraint
|
|
* validation.
|
|
* This callback specifies a descriptor of the ASN.1 type which failed
|
|
* the constraint check, as well as human readable message on what
|
|
* particular constraint has failed.
|
|
*/
|
|
typedef void (asn_app_constraint_failed_f)(void *application_specific_key,
|
|
const struct asn_TYPE_descriptor_s *type_descriptor_which_failed,
|
|
const void *structure_which_failed_ptr,
|
|
const char *error_message_format, ...) CC_PRINTFLIKE(4, 5);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#include "constr_TYPE.h" /* for asn_TYPE_descriptor_t */
|
|
|
|
#endif /* ASN_APPLICATION_H */
|