eccx08_ameth.c File Reference

Implementation of OpenSSL ENGINE callback functions for ECC See ec_ameth.c for an example. More...

#include <stdint.h>
#include <stdio.h>
#include <assert.h>
#include <engine.h>
#include <openssl/x509.h>
#include <openssl/ec.h>
#include <openssl/bn.h>
#include <openssl/cms.h>
#include <openssl/asn1t.h>
#include <evp.h>
#include <ossl_typ.h>
#include <err.h>
#include <crypto/asn1/asn1_locl.h>
#include <crypto/ec/ec_lcl.h>
#include <crypto/ecdsa/ecs_locl.h>
#include "ecc_meth.h"

Functions
int	eccx08_item_verify (EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, X509_ALGOR *a, ASN1_BIT_STRING *sig, EVP_PKEY *pkey)
	Verify an item signature (not used by ateccx08). More...
int	eccx08_item_sign (EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, X509_ALGOR *algor1, X509_ALGOR *algor2, ASN1_BIT_STRING *signature)
	Generates a digest then sends the digest to the ATECCX08 chip to generate an ECDSA signature using private key from TLS_SLOT_AUTH_PRIV slot. The private key is always stays in the chip: OpenSSL (nor any other software) has no way to read it. More...
int	eccx08_pkey_asn1_meth_f (ENGINE *e, EVP_PKEY_ASN1_METHOD **pkey_asn1_meth, const int **nids, int nid)
	Initialize the EVP_PKEY_ASN1_METHOD method callback for ateccx08 engine. Just returns a pointer to EVP_PKEY_METHOD eccx08_pkey_meth. More...
int	eccx08_pkey_asn1_meth_init (void)
	Initialize the EVP_PKEY_ASN1_METHOD method for ateccx08 engine. More...

Variables
EVP_PKEY_ASN1_METHOD	eccx08_pkey_asn1_meth
	eccx08_pkey_asn1_meth is an OpenSSL EVP_PKEY_ASN1_METHOD structure specific to the ateccx08 engine. See the crypto/asn1/asn1_locl.h file for details on the struct evp_pkey_asn1_method_st

Detailed Description

Implementation of OpenSSL ENGINE callback functions for ECC See ec_ameth.c for an example.

Copyright (c) 2015 Atmel Corporation. All rights reserved.

Function Documentation

int eccx08_item_sign	(	EVP_MD_CTX *	ctx,
		const ASN1_ITEM *	it,
		void *	asn,
		X509_ALGOR *	algor1,
		X509_ALGOR *	algor2,
		ASN1_BIT_STRING *	signature
	)

Generates a digest then sends the digest to the ATECCX08 chip to generate an ECDSA signature using private key from TLS_SLOT_AUTH_PRIV slot. The private key is always stays in the chip: OpenSSL (nor any other software) has no way to read it.

Parameters

[in]	ctx	- a pointer to the EVP_MD_CTX structure
[in]	it	- a pointer to the ASN1_ITEM structure
[in]	asn	- a void pointer to the parameter
[in]	algor1	- a pointer to the X509_ALGOR structure
[in]	algor2	- a pointer to the X509_ALGOR structure
[out]	signature	- a pointer to the ASN1_BIT_STRING structure to return the signature in the ASN.1 format

Returns

1 for success

int eccx08_item_verify	(	EVP_MD_CTX *	ctx,
		const ASN1_ITEM *	it,
		void *	asn,
		X509_ALGOR *	a,
		ASN1_BIT_STRING *	sig,
		EVP_PKEY *	pkey
	)

Verify an item signature (not used by ateccx08).

Parameters

[in]	ctx	- a pointer to the EVP_MD_CTX structure
[in]	it	- a pointer to the ASN1_ITEM structure
[in]	asn	- a void pointer to the parameter
[in]	a	- a pointer to the X509_ALGOR structure
[in]	sig	- a pointer to the ASN1_BIT_STRING structure
[in]	pkey	- a pointer to the EVP_PKEY structure

Returns

1 for success

int eccx08_pkey_asn1_meth_f	(	ENGINE *	e,
		EVP_PKEY_ASN1_METHOD **	pkey_asn1_meth,
		const int **	nids,
		int	nid
	)

Initialize the EVP_PKEY_ASN1_METHOD method callback for ateccx08 engine. Just returns a pointer to EVP_PKEY_METHOD eccx08_pkey_meth.

Parameters

[in]	e	- a pointer to the engine (ateccx08 in our case).
[out]	pkey_asn1_meth	- a double pointer to EVP_PKEY_ASN1_METHOD to return the EVP_PKEY_ASN1_METHOD eccx08_pkey_asn1_meth
[out]	nids	- a double pointer to return an array of nid's (we return 0)
[in]	nid	- a number of expected nid's (we ignore this parameter)

Returns

1 for success

int eccx08_pkey_asn1_meth_init

(

void

)

Initialize the EVP_PKEY_ASN1_METHOD method for ateccx08 engine.

Returns

1 for success