1 files changed, 82 insertions, 0 deletions
diff --git a/regress/misc/fuzz-harness/mkcorpus_sntrup761.c b/regress/misc/fuzz-harness/mkcorpus_sntrup761.c
new file mode 100644
index 000000000000..86a8e02aa997
--- /dev/null
+++ b/regress/misc/fuzz-harness/mkcorpus_sntrup761.c
@@ -0,0 +1,82 @@
+// Makes basic seed corpora for other fuzzers
+//
+// Will write to ./sntrup761_pubkey_corpus (for sntrup761_enc_fuzz) and
+// to ./sntrup761_ciphertext_corpus (for sntrup761_dec_fuzz)
+
+#include <sys/stat.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <err.h>
+#include <errno.h>
+
+#include "crypto_api.h"
+#include "hash.c"
+
+#undef randombytes
+#define USE_SNTRUP761X25519 1
+void randombytes(unsigned char *ptr, size_t l);
+volatile crypto_int16 crypto_int16_optblocker = 0;
+volatile crypto_int32 crypto_int32_optblocker = 0;
+volatile crypto_int64 crypto_int64_optblocker = 0;
+#include "sntrup761.c"
+
+#define NSEEDS 1000
+
+static int real_random;
+
+void
+randombytes(unsigned char *ptr, size_t l)
+{
+	if (real_random)
+		arc4random_buf(ptr, l);
+	else
+		memset(ptr, 0, l);
+}
+
+void write_blob(const char *path, int n, const char *suffix,
+    const void *ptr, size_t l)
+{
+	char name[256];
+	FILE *f;
+
+	snprintf(name, sizeof(name), "%s/%06d.%s", path, n, suffix);
+	if ((f = fopen(name, "wb+")) == NULL)
+		err(1, "fopen %s", name);
+	if (fwrite(ptr, l, 1, f) != 1)
+		err(1, "write %s", name);
+	fclose(f);
+}
+
+int main(void)
+{
+	int i;
+	unsigned char pk[crypto_kem_sntrup761_PUBLICKEYBYTES];
+	unsigned char sk[crypto_kem_sntrup761_SECRETKEYBYTES];
+	unsigned char ciphertext[crypto_kem_sntrup761_CIPHERTEXTBYTES];
+	unsigned char secret[crypto_kem_sntrup761_BYTES];
+
+	if (mkdir("sntrup761_pubkey_corpus", 0777) != 0 && errno != EEXIST)
+		err(1, "mkdir sntrup761_pubkey_corpus");
+	if (mkdir("sntrup761_ciphertext_corpus", 0777) != 0 && errno != EEXIST)
+		err(1, "mkdir sntrup761_ciphertext_corpus");
+
+	fprintf(stderr, "making: ");
+	for (i = 0; i < NSEEDS; i++) {
+		real_random = i != 0;
+		if (crypto_kem_sntrup761_keypair(pk, sk) != 0)
+			errx(1, "crypto_kem_sntrup761_keypair failed");
+		write_blob("sntrup761_pubkey_corpus", i, "pk", pk, sizeof(pk));
+		if (crypto_kem_sntrup761_enc(ciphertext, secret, pk) != 0)
+			errx(1, "crypto_kem_sntrup761_enc failed");
+		write_blob("sntrup761_ciphertext_corpus", i, "ct",
+		    ciphertext, sizeof(ciphertext));
+		if (i % 20 == 0)
+			fprintf(stderr, ".");
+	}
+	fprintf(stderr, "\n");
+	return 0;
+}