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/* $OpenBSD: dercache.c,v 1.1 2023/04/25 21:51:44 job Exp $ */
/*
* Copyright (c) 2023 Job Snijders <job@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This program tests whether the presence of "->enc.modified = 1;"
* in select X509 setter functions properly triggers invalidation of cached
* DER.
*/
#include <err.h>
#include <stdio.h>
#include <string.h>
#include <openssl/evp.h>
#include <openssl/rsa.h>
#include <openssl/x509.h>
#define SETUP() \
derp = der; \
if ((a = d2i_X509(NULL, &derp, dersz)) == NULL) \
errx(1, "d2i_X509"); \
if ((der2sz = i2d_X509(a, &der2)) <= 0) \
errx(1, "i2d_X509"); \
der2p = der2;
#define CLEANUP() \
X509_free(a); \
a = NULL; \
free(der2); \
der2 = NULL;
#define CLEANUPSETUP() \
CLEANUP() \
SETUP()
#define SETX509NAME(fname, value, cert) \
if ((xn = X509_NAME_new()) == NULL) \
err(1, NULL); \
if (!X509_NAME_add_entry_by_txt(xn, "C", MBSTRING_ASC, \
(const unsigned char*) value, -1, -1, 0)) \
errx(1, "X509_NAME_add_entry_by_txt"); \
if (!fname(cert, xn)) \
errx(1, "fname"); \
X509_NAME_free(xn); \
xn = NULL;
#define SETASN1TIME(fname, value, cert) \
if ((at = ASN1_TIME_new()) == NULL) \
err(1, NULL); \
if ((at = X509_gmtime_adj(NULL, value)) == NULL) \
errx(1, "X509_gmtime_adj"); \
if (!fname(cert, at)) \
errx(1, "fname"); \
ASN1_TIME_free(at); \
at = NULL;
#define SETINTEGER(fname, value, cert) \
if ((ai = ASN1_INTEGER_new()) == NULL) \
err(1, NULL); \
if (!ASN1_INTEGER_set(ai, value)) \
errx(1, "ASN1_INTEGER_set"); \
if (!fname(cert, ai)) \
errx(1, "fname"); \
ASN1_INTEGER_free(ai); \
ai = NULL;
static int
x509_compare(char *f, X509 *a, const unsigned char *der, long dersz)
{
unsigned char *der_test = NULL;
long der_testsz;
int rc = 0;
if ((der_testsz = i2d_X509(a, &der_test)) <= 0)
errx(1, "i2d_X509");
if (dersz == der_testsz) {
if (memcmp(der, der_test, dersz) == 0) {
warnx("%s() didn't invalidate DER cache", f);
rc = 1;
} else
warnx("%s() OK", f);
} else
warnx("%s() OK", f);
free(der_test);
return rc;
}
int
main(void)
{
ASN1_INTEGER *ai = NULL;
ASN1_TIME *at = NULL;
EVP_PKEY *pkey = NULL;
EVP_PKEY_CTX *pkey_ctx = NULL;
X509_NAME *xn = NULL;
X509 *a, *x;
const unsigned char *derp, *der2p;
unsigned char *der = NULL, *der2 = NULL;
long dersz, der2sz;
int ret = 0;
if ((x = X509_new()) == NULL)
err(1, NULL);
if ((pkey_ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_RSA, NULL)) == NULL)
errx(1, "EVP_PKEY_CTX_new_id");
if (EVP_PKEY_keygen_init(pkey_ctx) != 1)
errx(1, "EVP_PKEY_keygen_init");
if (EVP_PKEY_CTX_set_rsa_keygen_bits(pkey_ctx, 2048) <= 0)
errx(1, "EVP_PKEY_CTX_set_rsa_keygen_bits");
if (EVP_PKEY_keygen(pkey_ctx, &pkey) <= 0)
errx(1, "EVP_PKEY_keygen");
if (X509_set_pubkey(x, pkey) != 1)
errx(1, "X509_set_pubkey");
SETINTEGER(X509_set_serialNumber, 1, x)
SETASN1TIME(X509_set_notBefore, 0, x)
SETASN1TIME(X509_set_notAfter, 60, x)
SETX509NAME(X509_set_issuer_name, "NL", x)
SETX509NAME(X509_set_subject_name, "BE", x)
// one time creation of the original DER
if (!X509_sign(x, pkey, EVP_sha256()))
errx(1, "X509_sign");
if ((dersz = i2d_X509(x, &der)) <= 0)
errx(1, "i2d_X509");
SETUP()
// test X509_set_version
if (!X509_set_version(a, 2))
errx(1, "X509_set_version");
ret += x509_compare("X509_set_version", a, der2p, der2sz);
CLEANUPSETUP()
// test X509_set_serialNumber
SETINTEGER(X509_set_serialNumber, 2, a)
ret += x509_compare("X509_set_serialNumber", a, der2p, der2sz);
CLEANUPSETUP()
// test X509_set_issuer_name
SETX509NAME(X509_set_issuer_name, "DE", a)
ret += x509_compare("X509_set_issuer_name", a, der2p, der2sz);
CLEANUPSETUP()
// test X509_set_subject_name
SETX509NAME(X509_set_subject_name, "FR", a)
ret += x509_compare("X509_set_subject_name", a, der2p, der2sz);
CLEANUPSETUP()
// test X509_set_notBefore
SETASN1TIME(X509_set_notBefore, 120, a)
ret += x509_compare("X509_set_notBefore", a, der2p, der2sz);
CLEANUPSETUP()
// test X509_set_notAfter
SETASN1TIME(X509_set_notAfter, 180, a)
ret += x509_compare("X509_set_notAfter", a, der2p, der2sz);
CLEANUPSETUP()
// test X509_set_pubkey
if (EVP_PKEY_keygen(pkey_ctx, &pkey) <= 0)
errx(1, "EVP_PKEY_keygen");
if (X509_set_pubkey(a, pkey) != 1)
errx(1, "X509_set_pubkey");
ret += x509_compare("X509_set_pubkey", a, der2p, der2sz);
CLEANUP()
if (ret)
return 1;
}
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