upstream: U2F/FIDO middleware interface

Supports enrolling (generating) keys and signatures.

feedback & ok markus@

OpenBSD-Commit-ID: 73d1dd5939454f9c7bd840f48236cba41e8ad592

1 files changed, 49 insertions, 0 deletions

diff --git a/ssh-sk.h b/ssh-sk.h
new file mode 100644
index 00000000..7c1d2b92
--- /dev/null
+++ b/ssh-sk.h
@@ -0,0 +1,49 @@
+/* $OpenBSD: ssh-sk.h,v 1.1 2019/10/31 21:16:20 djm Exp $ */
+/*
+ * Copyright (c) 2019 Google LLC
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _SSH_SK_H
+#define _SSH_SK_H 1
+
+struct sshbuf;
+struct sshkey;
+
+/*
+ * Enroll (generate) a new security-key hosted private key via the specified
+ * provider middleware.
+ * If challenge_buf is NULL then a random 256 bit challenge will be used.
+ *
+ * Returns 0 on success or a ssherr.h error code on failure.
+ *
+ * If successful and the attest_data buffer is not NULL then attestation
+ * information is placed there.
+ */
+int sshsk_enroll(const char *provider_path, const char *application,
+    uint8_t flags, struct sshbuf *challenge_buf, struct sshkey **keyp,
+    struct sshbuf *attest);
+
+/*
+ * Calculate an ECDSA_SK signature using the specified key and provider
+ * middleware.
+ *
+ * Returns 0 on success or a ssherr.h error code on failure.
+ */
+int sshsk_ecdsa_sign(const char *provider_path, const struct sshkey *key,
+    u_char **sigp, size_t *lenp, const u_char *data, size_t datalen,
+    u_int compat);
+
+#endif /* _SSH_SK_H */
+