1 /* $OpenBSD: sk-api.h,v 1.9 2020/04/28 04:02:29 djm Exp $ */
3 * Copyright (c) 2019 Google LLC
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
27 #define SSH_SK_USER_PRESENCE_REQD 0x01
28 #define SSH_SK_USER_VERIFICATION_REQD 0x04
29 #define SSH_SK_RESIDENT_KEY 0x20
32 #define SSH_SK_ECDSA 0x00
33 #define SSH_SK_ED25519 0x01
36 #define SSH_SK_ERR_GENERAL -1
37 #define SSH_SK_ERR_UNSUPPORTED -2
38 #define SSH_SK_ERR_PIN_REQUIRED -3
39 #define SSH_SK_ERR_DEVICE_NOT_FOUND -4
41 struct sk_enroll_response {
43 size_t public_key_len;
45 size_t key_handle_len;
48 uint8_t *attestation_cert;
49 size_t attestation_cert_len;
52 struct sk_sign_response {
61 struct sk_resident_key {
65 struct sk_enroll_response key;
74 #define SSH_SK_VERSION_MAJOR 0x00050000 /* current API version */
75 #define SSH_SK_VERSION_MAJOR_MASK 0xffff0000
77 /* Return the version of the middleware API */
78 uint32_t sk_api_version(void);
80 /* Enroll a U2F key (private key generation) */
81 int sk_enroll(uint32_t alg, const uint8_t *challenge, size_t challenge_len,
82 const char *application, uint8_t flags, const char *pin,
83 struct sk_option **options, struct sk_enroll_response **enroll_response);
85 /* Sign a challenge */
86 int sk_sign(uint32_t alg, const uint8_t *message, size_t message_len,
87 const char *application, const uint8_t *key_handle, size_t key_handle_len,
88 uint8_t flags, const char *pin, struct sk_option **options,
89 struct sk_sign_response **sign_response);
91 /* Enumerate all resident keys */
92 int sk_load_resident_keys(const char *pin, struct sk_option **options,
93 struct sk_resident_key ***rks, size_t *nrks);
95 #endif /* _SK_API_H */