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70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/* $OpenBSD: sk-api.h,v 1.2 2019/11/12 19:32:30 markus Exp $ */
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/*
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* Copyright (c) 2019 Google LLC
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _SK_API_H
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#define _SK_API_H 1
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#include <stddef.h>
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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/* Flags */
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#define SSH_SK_USER_PRESENCE_REQD 0x01
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/* Algs */
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#define SSH_SK_ECDSA 0x00
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#define SSH_SK_ED25519 0x01
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struct sk_enroll_response {
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uint8_t *public_key;
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size_t public_key_len;
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uint8_t *key_handle;
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size_t key_handle_len;
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uint8_t *signature;
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size_t signature_len;
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uint8_t *attestation_cert;
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size_t attestation_cert_len;
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};
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struct sk_sign_response {
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uint8_t flags;
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uint32_t counter;
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uint8_t *sig_r;
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size_t sig_r_len;
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uint8_t *sig_s;
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size_t sig_s_len;
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};
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#define SSH_SK_VERSION_MAJOR 0x00020000 /* current API version */
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#define SSH_SK_VERSION_MAJOR_MASK 0xffff0000
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/* Return the version of the middleware API */
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uint32_t sk_api_version(void);
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/* Enroll a U2F key (private key generation) */
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int sk_enroll(int alg, const uint8_t *challenge, size_t challenge_len,
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const char *application, uint8_t flags,
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struct sk_enroll_response **enroll_response);
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/* Sign a challenge */
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int sk_sign(int alg, const uint8_t *message, size_t message_len,
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const char *application, const uint8_t *key_handle, size_t key_handle_len,
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uint8_t flags, struct sk_sign_response **sign_response);
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#endif /* _SK_API_H */
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