Fuzzer harnesses for sig verify and pubkey parsing

These are some basic clang libfuzzer harnesses for signature
verification and public key parsing. Some assembly (metaphorical)
required.

1 files changed, 18 insertions, 0 deletions

diff --git a/regress/misc/fuzz-harness/pubkey_fuzz.cc b/regress/misc/fuzz-harness/pubkey_fuzz.cc
new file mode 100644
index 000000000..8bbc11093
--- /dev/null
+++ b/regress/misc/fuzz-harness/pubkey_fuzz.cc
@@ -0,0 +1,18 @@
+#include <stddef.h>
+#include <stdio.h>
+#include <stdint.h>
+
+extern "C" {
+
+#include "sshkey.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
+{
+        struct sshkey *k = NULL;
+        int r = sshkey_from_blob(data, size, &k);
+        if (r == 0) sshkey_free(k);
+        return 0;
+}
+
+} // extern
+