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-rw-r--r--regress/misc/fuzz-harness/sig_fuzz.cc62
1 files changed, 62 insertions, 0 deletions
diff --git a/regress/misc/fuzz-harness/sig_fuzz.cc b/regress/misc/fuzz-harness/sig_fuzz.cc
new file mode 100644
index 0000000..b32502b
--- /dev/null
+++ b/regress/misc/fuzz-harness/sig_fuzz.cc
@@ -0,0 +1,62 @@
+// cc_fuzz_target test for public key parsing.
+
+#include <stddef.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+extern "C" {
+
+#include "includes.h"
+#include "sshkey.h"
+#include "ssherr.h"
+
+static struct sshkey *generate_or_die(int type, unsigned bits) {
+ int r;
+ struct sshkey *ret;
+ if ((r = sshkey_generate(type, bits, &ret)) != 0) {
+ fprintf(stderr, "generate(%d, %u): %s", type, bits, ssh_err(r));
+ abort();
+ }
+ return ret;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t* sig, size_t slen)
+{
+#ifdef WITH_OPENSSL
+ static struct sshkey *rsa = generate_or_die(KEY_RSA, 2048);
+ static struct sshkey *dsa = generate_or_die(KEY_DSA, 1024);
+ static struct sshkey *ecdsa256 = generate_or_die(KEY_ECDSA, 256);
+ static struct sshkey *ecdsa384 = generate_or_die(KEY_ECDSA, 384);
+ static struct sshkey *ecdsa521 = generate_or_die(KEY_ECDSA, 521);
+#endif
+ struct sshkey_sig_details *details = NULL;
+ static struct sshkey *ed25519 = generate_or_die(KEY_ED25519, 0);
+ static const char *data = "If everyone started announcing his nose had "
+ "run away, I don’t know how it would all end";
+ static const size_t dlen = strlen(data);
+
+#ifdef WITH_OPENSSL
+ sshkey_verify(rsa, sig, slen, (const u_char *)data, dlen, NULL, 0, &details);
+ sshkey_sig_details_free(details);
+ details = NULL;
+ sshkey_verify(dsa, sig, slen, (const u_char *)data, dlen, NULL, 0, &details);
+ sshkey_sig_details_free(details);
+ details = NULL;
+ sshkey_verify(ecdsa256, sig, slen, (const u_char *)data, dlen, NULL, 0, &details);
+ sshkey_sig_details_free(details);
+ details = NULL;
+ sshkey_verify(ecdsa384, sig, slen, (const u_char *)data, dlen, NULL, 0, &details);
+ sshkey_sig_details_free(details);
+ details = NULL;
+ sshkey_verify(ecdsa521, sig, slen, (const u_char *)data, dlen, NULL, 0, &details);
+ sshkey_sig_details_free(details);
+ details = NULL;
+#endif
+ sshkey_verify(ed25519, sig, slen, (const u_char *)data, dlen, NULL, 0, &details);
+ sshkey_sig_details_free(details);
+ return 0;
+}
+
+} // extern