Code common to EAP-SIM/AKA/AKA' clients and servers. More...

#include <freeradius-devel/io/test_point.h>
#include <freeradius-devel/server/module.h>
#include <freeradius-devel/tls/base.h>
#include <freeradius-devel/tls/strerror.h>
#include <freeradius-devel/util/dbuff.h>
#include <freeradius-devel/util/rand.h>
#include <freeradius-devel/util/debug.h>
#include <freeradius-devel/util/sha1.h>
#include <freeradius-devel/eap/types.h>
#include "base.h"
#include "attrs.h"
#include "crypto_priv.h"

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Macros
#define	SIM_MAX_ATTRIBUTE_VALUE_LEN ((255 * 4) - 2) /* max length field value less Type + Length fields */

Functions
static int	_test_ctx_free (UNUSED fr_aka_sim_ctx_t *ctx)

static ssize_t	encode_array (fr_dbuff_t dbuff, fr_da_stack_t da_stack, int depth, fr_dcursor_t cursor, void encode_ctx)
	Encodes the data portion of an attribute. More...

static ssize_t	encode_encrypted_value (fr_dbuff_t dbuff, uint8_t const in, size_t inlen, void *encode_ctx)
	encrypt a value with AES-CBC-128 More...

static ssize_t	encode_iv (fr_dbuff_t dbuff, void encode_ctx)
	Add an IV to a packet. More...

static ssize_t	encode_rfc (fr_dbuff_t dbuff, fr_da_stack_t da_stack, unsigned int depth, fr_dcursor_t cursor, void encode_ctx)
	Encode an RFC format attribute header. More...

static int	encode_test_ctx_aka (void *out, TALLOC_CTX ctx)

static int	encode_test_ctx_sim (void *out, TALLOC_CTX ctx)

static int	encode_test_ctx_sim_rfc4186 (void *out, TALLOC_CTX ctx)

static ssize_t	encode_tlv (fr_dbuff_t dbuff, fr_da_stack_t da_stack, unsigned int depth, fr_dcursor_t cursor, void encode_ctx)

static ssize_t	encode_tlv_internal (fr_dbuff_t dbuff, fr_da_stack_t da_stack, unsigned int depth, fr_dcursor_t cursor, void encode_ctx)

static ssize_t	encode_value (fr_dbuff_t dbuff, fr_da_stack_t da_stack, int depth, fr_dcursor_t cursor, void encode_ctx)
	Encodes the data portion of an attribute. More...

ssize_t	fr_aka_sim_encode (request_t request, fr_pair_list_t to_encode, void *encode_ctx)

ssize_t	fr_aka_sim_encode_pair (fr_dbuff_t dbuff, fr_dcursor_t cursor, void *encode_ctx)

static bool	is_eap_aka_encodable (void const item, UNUSED void const uctx)
	Evaluation function for EAP-AKA-encodability. More...

static fr_aka_sim_ctx_t *	test_ctx_init (TALLOC_CTX ctx, uint8_t const k_encr, size_t k_encr_len)

Variables
fr_test_point_pair_encode_t	aka_tp_encode

fr_test_point_pair_encode_t	sim_tp_encode

fr_test_point_pair_encode_t	sim_tp_encode_rfc4186

Detailed Description

Code common to EAP-SIM/AKA/AKA' clients and servers.

Copyright: 2017 FreeRADIUS server project

Definition in file encode.c.

Macro Definition Documentation

◆ SIM_MAX_ATTRIBUTE_VALUE_LEN

#define SIM_MAX_ATTRIBUTE_VALUE_LEN ((255 * 4) - 2) /* max length field value less Type + Length fields */

Definition at line 40 of file encode.c.

Function Documentation

◆ _test_ctx_free()

static int _test_ctx_free ( UNUSED fr_aka_sim_ctx_t * ctx )

static

Definition at line 980 of file encode.c.

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◆ encode_array()

static ssize_t encode_array	(	fr_dbuff_t *	dbuff,
		fr_da_stack_t *	da_stack,
		int	depth,
		fr_dcursor_t *	cursor,
		void *	encode_ctx
	)

static

Encodes the data portion of an attribute.

       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       | AT_VERSION_L..| Length        | Actual Version List Length    |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |  Supported Version 1          |  Supported Version 2          |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       .                                                               .
       .                                                               .
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       | Supported Version N           |     Padding                   |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Definition at line 516 of file encode.c.

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◆ encode_encrypted_value()

static ssize_t encode_encrypted_value	(	fr_dbuff_t *	dbuff,
		uint8_t const *	in,
		size_t	inlen,
		void *	encode_ctx
	)

static

encrypt a value with AES-CBC-128

encrypts a value using AES-CBC-128, padding the value with AT_PADDING attributes until it matches the block length of the cipher (16).

May also write out an AT_IV attribute if this is the first encrypted value being encoded.

       1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       | AT_ENCR_DATA  | Length        |           Reserved            |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                                                               |
       .                    Encrypted Data                             .
       .                                                               .
       |                                                               |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Definition at line 155 of file encode.c.

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◆ encode_iv()

static ssize_t encode_iv	(	fr_dbuff_t *	dbuff,
		void *	encode_ctx
	)

static

Add an IV to a packet.

       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |     AT_IV     | Length = 5    |           Reserved            |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                                                               |
       |                 Initialization Vector                         |
       |                                                               |
       |                                                               |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Definition at line 104 of file encode.c.

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◆ encode_rfc()

static ssize_t encode_rfc	(	fr_dbuff_t *	dbuff,
		fr_da_stack_t *	da_stack,
		unsigned int	depth,
		fr_dcursor_t *	cursor,
		void *	encode_ctx
	)

static

Encode an RFC format attribute header.

This could be a standard attribute, or a TLV data type. If it's a standard attribute, then vp->da->attr == attribute. Otherwise, attribute may be something else.

Definition at line 587 of file encode.c.

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◆ encode_test_ctx_aka()

static int encode_test_ctx_aka	(	void **	out,
		TALLOC_CTX *	ctx
	)

static

Definition at line 1025 of file encode.c.

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◆ encode_test_ctx_sim()

static int encode_test_ctx_sim	(	void **	out,
		TALLOC_CTX *	ctx
	)

static

Definition at line 1009 of file encode.c.

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◆ encode_test_ctx_sim_rfc4186()

static int encode_test_ctx_sim_rfc4186	(	void **	out,
		TALLOC_CTX *	ctx
	)

static

Definition at line 1041 of file encode.c.

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◆ encode_tlv()

static ssize_t encode_tlv	(	fr_dbuff_t *	dbuff,
		fr_da_stack_t *	da_stack,
		unsigned int	depth,
		fr_dcursor_t *	cursor,
		void *	encode_ctx
	)

static

Definition at line 727 of file encode.c.

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◆ encode_tlv_internal()

static ssize_t encode_tlv_internal	(	fr_dbuff_t *	dbuff,
		fr_da_stack_t *	da_stack,
		unsigned int	depth,
		fr_dcursor_t *	cursor,
		void *	encode_ctx
	)

inlinestatic

Definition at line 652 of file encode.c.

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◆ encode_value()

static ssize_t encode_value	(	fr_dbuff_t *	dbuff,
		fr_da_stack_t *	da_stack,
		int	depth,
		fr_dcursor_t *	cursor,
		void *	encode_ctx
	)

static

Encodes the data portion of an attribute.

Returns: > 0, Length of the data portion. = 0, we could not encode anything, skip this attribute (and don't encode the header) < 0, failure.

Definition at line 272 of file encode.c.

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◆ fr_aka_sim_encode()

ssize_t fr_aka_sim_encode	(	request_t *	request,
		fr_pair_list_t *	to_encode,
		void *	encode_ctx
	)

Definition at line 858 of file encode.c.

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◆ fr_aka_sim_encode_pair()

ssize_t fr_aka_sim_encode_pair	(	fr_dbuff_t *	dbuff,
		fr_dcursor_t *	cursor,
		void *	encode_ctx
	)

Definition at line 799 of file encode.c.

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◆ is_eap_aka_encodable()

static bool is_eap_aka_encodable	(	void const *	item,
		UNUSED void const *	uctx
	)

static

Evaluation function for EAP-AKA-encodability.

Parameters

item	pointer to a fr_pair_t
uctx	context

Returns: true if the underlying fr_pair_t is EAP_AKA encodable, false otherwise

Definition at line 71 of file encode.c.

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◆ test_ctx_init()

static fr_aka_sim_ctx_t* test_ctx_init	(	TALLOC_CTX *	ctx,
		uint8_t const *	k_encr,
		size_t	k_encr_len
	)

static

Definition at line 987 of file encode.c.

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Variable Documentation

◆ aka_tp_encode

fr_test_point_pair_encode_t aka_tp_encode

Initial value:

= {
        .test_ctx       = encode_test_ctx_aka,
        .func           = fr_aka_sim_encode_pair
}

Definition at line 1065 of file encode.c.

◆ sim_tp_encode

fr_test_point_pair_encode_t sim_tp_encode

Initial value:

= {
        .test_ctx       = encode_test_ctx_sim,
        .func           = fr_aka_sim_encode_pair
}

Definition at line 1059 of file encode.c.

◆ sim_tp_encode_rfc4186

fr_test_point_pair_encode_t sim_tp_encode_rfc4186

Initial value:

= {
        .test_ctx       = encode_test_ctx_sim_rfc4186,
        .func           = fr_aka_sim_encode_pair
}

Definition at line 1071 of file encode.c.

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ SIM_MAX_ATTRIBUTE_VALUE_LEN

Function Documentation

◆ _test_ctx_free()

◆ encode_array()

◆ encode_encrypted_value()

◆ encode_iv()

◆ encode_rfc()

◆ encode_test_ctx_aka()

◆ encode_test_ctx_sim()

◆ encode_test_ctx_sim_rfc4186()

◆ encode_tlv()

◆ encode_tlv_internal()

◆ encode_value()

◆ fr_aka_sim_encode()

◆ fr_aka_sim_encode_pair()

◆ is_eap_aka_encodable()

◆ test_ctx_init()

Variable Documentation

◆ aka_tp_encode

◆ sim_tp_encode

◆ sim_tp_encode_rfc4186