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Fix DER length decoding bug

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`asn1_length_from_der` incorrectly accept the BER long length.
This commit is contained in:
Zhi Guan
2024-06-11 23:18:55 +08:00
parent 75430408c2
commit b1f25ab306
2 changed files with 42 additions and 0 deletions
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33
tests/asn1test.c
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@@ -13,6 +13,7 @@
#include <string.h>
#include <limits.h>
#include <assert.h>
#include <gmssl/hex.h>
#include <gmssl/asn1.h>
#include <gmssl/error.h>
@@ -121,6 +122,37 @@ static int test_asn1_length(void)
return 1;
}
static int test_asn1_length_from_ber(void)
{
char *tests[] = {
"80",
"8100",
"8101",
"820000",
"820001",
"8200ff",
"83001122",
"8400ffffff",
"850100000000",
};
uint8_t buf[16];
const uint8_t *p;
size_t a, len, i;
for (i = 0; i < sizeof(tests)/sizeof(tests[i]); i++) {
hex_to_bytes(tests[i], strlen(tests[i]), buf, &len);
p = buf;
len = (size_t)((uint64_t)1 << 33);
if (asn1_length_from_der(&a, &p, &len) != -1) {
error_print();
return -1;
}
}
printf("%s() ok\n", __FUNCTION__);
return 1;
}
static int test_asn1_boolean(void)
{
int tests[] = {0, 1};
@@ -807,6 +839,7 @@ int main(void)
{
if (test_asn1_tag() != 1) goto err;
if (test_asn1_length() != 1) goto err;
if (test_asn1_length_from_ber() != 1) goto err;
if (test_asn1_boolean() != 1) goto err;
if (test_asn1_int() != 1) goto err;
if (test_asn1_bits() != 1) goto err;