Michael Brown
148 lines
4.8 KiB
C
148 lines
4.8 KiB
C
/*
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* Copyright (C) 2024 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** @file
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*
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* Public key self-tests
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*
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*/
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/* Forcibly enable assertions */
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#undef NDEBUG
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <ipxe/crypto.h>
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#include <ipxe/test.h>
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#include "pubkey_test.h"
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/**
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* Report public key encryption and decryption test result
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*
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* @v test Public key encryption and decryption test
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* @v file Test code file
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* @v line Test code line
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*/
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void pubkey_okx ( struct pubkey_test *test, const char *file,
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unsigned int line ) {
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struct pubkey_algorithm *pubkey = test->pubkey;
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struct asn1_builder plaintext;
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struct asn1_builder ciphertext;
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/* Test key matching */
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okx ( pubkey_match ( pubkey, &test->private, &test->public ) == 0,
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file, line );
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/* Test decrypting with private key to obtain known plaintext */
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plaintext.data = NULL;
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plaintext.len = 0;
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okx ( pubkey_decrypt ( pubkey, &test->private, &test->ciphertext,
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&plaintext ) == 0, file, line );
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okx ( asn1_compare ( asn1_built ( &plaintext ),
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&test->plaintext ) == 0, file, line );
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free ( plaintext.data );
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/* Test encrypting with private key and decrypting with public key */
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ciphertext.data = NULL;
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ciphertext.len = 0;
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plaintext.data = NULL;
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plaintext.len = 0;
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okx ( pubkey_encrypt ( pubkey, &test->private, &test->plaintext,
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&ciphertext ) == 0, file, line );
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okx ( pubkey_decrypt ( pubkey, &test->public,
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asn1_built ( &ciphertext ),
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&plaintext ) == 0, file, line );
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okx ( asn1_compare ( asn1_built ( &plaintext ),
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&test->plaintext ) == 0, file, line );
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free ( ciphertext.data );
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free ( plaintext.data );
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/* Test encrypting with public key and decrypting with private key */
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ciphertext.data = NULL;
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ciphertext.len = 0;
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plaintext.data = NULL;
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plaintext.len = 0;
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okx ( pubkey_encrypt ( pubkey, &test->public, &test->plaintext,
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&ciphertext ) == 0, file, line );
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okx ( pubkey_decrypt ( pubkey, &test->private,
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asn1_built ( &ciphertext ),
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&plaintext ) == 0, file, line );
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okx ( asn1_compare ( asn1_built ( &plaintext ),
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&test->plaintext ) == 0, file, line );
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free ( ciphertext.data );
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free ( plaintext.data );
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}
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/**
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* Report public key signature test result
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*
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* @v test Public key signature test
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* @v file Test code file
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* @v line Test code line
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*/
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void pubkey_sign_okx ( struct pubkey_sign_test *test, const char *file,
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unsigned int line ) {
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struct pubkey_algorithm *pubkey = test->pubkey;
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struct digest_algorithm *digest = test->digest;
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uint8_t digestctx[digest->ctxsize ];
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uint8_t digestout[digest->digestsize];
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struct asn1_builder signature = { NULL, 0 };
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uint8_t *bad;
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/* Test key matching */
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okx ( pubkey_match ( pubkey, &test->private, &test->public ) == 0,
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file, line );
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/* Construct digest over plaintext */
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digest_init ( digest, digestctx );
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digest_update ( digest, digestctx, test->plaintext,
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test->plaintext_len );
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digest_final ( digest, digestctx, digestout );
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/* Test signing using private key */
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okx ( pubkey_sign ( pubkey, &test->private, digest, digestout,
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&signature ) == 0, file, line );
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okx ( signature.len != 0, file, line );
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okx ( asn1_compare ( asn1_built ( &signature ),
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&test->signature ) == 0, file, line );
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/* Test verification using public key */
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okx ( pubkey_verify ( pubkey, &test->public, digest, digestout,
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&test->signature ) == 0, file, line );
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/* Test verification failure of modified signature */
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bad = ( signature.data + ( test->signature.len / 2 ) );
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okx ( pubkey_verify ( pubkey, &test->public, digest, digestout,
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asn1_built ( &signature ) ) == 0, file, line );
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*bad ^= 0x40;
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okx ( pubkey_verify ( pubkey, &test->public, digest, digestout,
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asn1_built ( &signature ) ) != 0, file, line );
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/* Free signature */
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free ( signature.data );
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}
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