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/* $OpenBSD: asn1complex.c,v 1.2 2022/04/27 17:43:41 jsing Exp $ */
/*
* Copyright (c) 2017, 2021 Joel Sing <jsing@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.
*/
#include <openssl/asn1.h>
#include <openssl/err.h>
#include <err.h>
#include <stdio.h>
#include <string.h>
static void
hexdump(const unsigned char *buf, size_t len)
{
size_t i;
for (i = 1; i <= len; i++)
fprintf(stderr, " 0x%02hhx,%s", buf[i - 1], i % 8 ? "" : "\n");
fprintf(stderr, "\n");
}
static int
asn1_compare_bytes(const char *label, const unsigned char *d1, int len1,
const unsigned char *d2, int len2)
{
if (len1 != len2) {
fprintf(stderr, "FAIL: %s - byte lengths differ "
"(%i != %i)\n", label, len1, len2);
return 0;
}
if (memcmp(d1, d2, len1) != 0) {
fprintf(stderr, "FAIL: %s - bytes differ\n", label);
fprintf(stderr, "Got:\n");
hexdump(d1, len1);
fprintf(stderr, "Want:\n");
hexdump(d2, len2);
return 0;
}
return 1;
}
/* Constructed octet string with length 12. */
const uint8_t asn1_constructed_basic_ber[] = {
0x24, 0x0c,
0x04, 0x01, 0x01,
0x04, 0x02, 0x01, 0x02,
0x04, 0x03, 0x01, 0x02, 0x03
};
const uint8_t asn1_constructed_basic_content[] = {
0x01, 0x01, 0x02, 0x01, 0x02, 0x03,
};
/* Nested constructed octet string. */
const uint8_t asn1_constructed_nested_ber[] = {
0x24, 0x1a,
0x04, 0x01, 0x01,
0x24, 0x15,
0x04, 0x02, 0x02, 0x03,
0x24, 0x0f,
0x24, 0x0d,
0x04, 0x03, 0x04, 0x05, 0x06,
0x24, 0x06,
0x24, 0x04,
0x04, 0x02, 0x07, 0x08,
};
const uint8_t asn1_constructed_nested_content[] = {
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
};
/* Deeply nested constructed octet string. */
const uint8_t asn1_constructed_deep_nested_ber[] = {
0x24, 0x1b,
0x04, 0x01, 0x01,
0x24, 0x16,
0x04, 0x02, 0x02, 0x03,
0x24, 0x10,
0x24, 0x0e,
0x04, 0x03, 0x04, 0x05, 0x06,
0x24, 0x07,
0x24, 0x05,
0x24, 0x03,
0x04, 0x01, 0x07,
};
/* Constructed octet string with indefinite length. */
const uint8_t asn1_constructed_indefinite_ber[] = {
0x24, 0x80,
0x04, 0x01, 0x01,
0x04, 0x02, 0x01, 0x02,
0x04, 0x03, 0x01, 0x02, 0x03,
0x00, 0x00,
};
const uint8_t asn1_constructed_indefinite_content[] = {
0x01, 0x01, 0x02, 0x01, 0x02, 0x03,
};
struct asn1_constructed_test {
const char *name;
const uint8_t *asn1;
size_t asn1_len;
const uint8_t *want;
size_t want_len;
int want_error;
int valid;
};
const struct asn1_constructed_test asn1_constructed_tests[] = {
{
.name = "basic constructed",
.asn1 = asn1_constructed_basic_ber,
.asn1_len = sizeof(asn1_constructed_basic_ber),
.want = asn1_constructed_basic_content,
.want_len = sizeof(asn1_constructed_basic_content),
.valid = 1,
},
{
.name = "nested constructed",
.asn1 = asn1_constructed_nested_ber,
.asn1_len = sizeof(asn1_constructed_nested_ber),
.want = asn1_constructed_nested_content,
.want_len = sizeof(asn1_constructed_nested_content),
.valid = 1,
},
{
.name = "deep nested constructed",
.asn1 = asn1_constructed_deep_nested_ber,
.asn1_len = sizeof(asn1_constructed_deep_nested_ber),
.want_error = ASN1_R_NESTED_ASN1_STRING,
.valid = 0,
},
{
.name = "indefinite length constructed",
.asn1 = asn1_constructed_indefinite_ber,
.asn1_len = sizeof(asn1_constructed_indefinite_ber),
.want = asn1_constructed_indefinite_content,
.want_len = sizeof(asn1_constructed_indefinite_content),
.valid = 1,
},
};
#define N_CONSTRUCTED_TESTS \
(sizeof(asn1_constructed_tests) / sizeof(*asn1_constructed_tests))
static int
do_asn1_constructed_test(const struct asn1_constructed_test *act)
{
ASN1_OCTET_STRING *aos = NULL;
const uint8_t *p;
long err;
int failed = 1;
ERR_clear_error();
p = act->asn1;
aos = d2i_ASN1_OCTET_STRING(NULL, &p, act->asn1_len);
if (!act->valid) {
if (aos != NULL) {
fprintf(stderr, "FAIL: invalid ASN.1 decoded\n");
goto failed;
}
if (act->want_error != 0) {
err = ERR_peek_error();
if (ERR_GET_REASON(err) != act->want_error) {
fprintf(stderr, "FAIL: got error reason %d,"
"want %d", ERR_GET_REASON(err),
act->want_error);
goto failed;
}
}
goto done;
}
if (aos == NULL) {
fprintf(stderr, "FAIL: failed to decode ASN.1 constructed "
"octet string\n");
ERR_print_errors_fp(stderr);
goto failed;
}
if (!asn1_compare_bytes(act->name, ASN1_STRING_data(aos),
ASN1_STRING_length(aos), act->want, act->want_len))
goto failed;
done:
failed = 0;
failed:
ASN1_OCTET_STRING_free(aos);
return failed;
}
static int
do_asn1_constructed_tests(void)
{
const struct asn1_constructed_test *act;
int failed = 0;
size_t i;
for (i = 0; i < N_CONSTRUCTED_TESTS; i++) {
act = &asn1_constructed_tests[i];
failed |= do_asn1_constructed_test(act);
}
return failed;
}
int
main(int argc, char **argv)
{
int failed = 0;
failed |= do_asn1_constructed_tests();
return (failed);
}
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