#include <stdio.h>
#include <openssl/bn.h>
+#include <openssl/err.h>
#include "fuzzer.h"
-int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len) {
- int success = 0;
- static BN_CTX *ctx;
- static BN_MONT_CTX *mont;
- static BIGNUM *b1;
- static BIGNUM *b2;
- static BIGNUM *b3;
- static BIGNUM *b4;
- static BIGNUM *b5;
- if (ctx == NULL) {
- b1 = BN_new();
- b2 = BN_new();
- b3 = BN_new();
- b4 = BN_new();
- b5 = BN_new();
- ctx = BN_CTX_new();
- mont = BN_MONT_CTX_new();
- }
- // Divide the input into three parts, using the values of the first two
- // bytes to choose lengths, which generate b1, b2 and b3. Use three bits
- // of the third byte to choose signs for the three numbers.
+int FuzzerInitialize(int *argc, char ***argv)
+{
+ OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
+ ERR_get_state();
+
+ return 1;
+}
+
+int FuzzerTestOneInput(const uint8_t *buf, size_t len)
+{
+ int success = 0;
size_t l1 = 0, l2 = 0, l3 = 0;
- int s1 = 0, s2 = 0, s3 = 0;
+ int s1 = 0, s3 = 0;
+ BN_CTX *ctx;
+ BIGNUM *b1;
+ BIGNUM *b2;
+ BIGNUM *b3;
+ BIGNUM *b4;
+ BIGNUM *b5;
+
+ b1 = BN_new();
+ b2 = BN_new();
+ b3 = BN_new();
+ b4 = BN_new();
+ b5 = BN_new();
+ ctx = BN_CTX_new();
+
+ /* Divide the input into three parts, using the values of the first two
+ * bytes to choose lengths, which generate b1, b2 and b3. Use three bits
+ * of the third byte to choose signs for the three numbers.
+ */
if (len > 2) {
len -= 3;
l1 = (buf[0] * len) / 255;
l3 = len - l1 - l2;
s1 = buf[0] & 1;
- s2 = buf[0] & 2;
s3 = buf[0] & 4;
++buf;
}
OPENSSL_assert(BN_bin2bn(buf, l1, b1) == b1);
BN_set_negative(b1, s1);
OPENSSL_assert(BN_bin2bn(buf + l1, l2, b2) == b2);
- BN_set_negative(b2, s2);
OPENSSL_assert(BN_bin2bn(buf + l1 + l2, l3, b3) == b3);
BN_set_negative(b3, s3);
- // mod 0 is undefined
+ /* mod 0 is undefined */
if (BN_is_zero(b3)) {
success = 1;
goto done;
done:
OPENSSL_assert(success);
+ BN_free(b1);
+ BN_free(b2);
+ BN_free(b3);
+ BN_free(b4);
+ BN_free(b5);
+ BN_CTX_free(ctx);
+ ERR_clear_error();
return 0;
}
+
+void FuzzerCleanup(void)
+{
+}