1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (c) 2020, Alexandru Gagniuc <mr.nuke.me@gmail.com>
4  */
5 
6 #include <dm/device.h>
7 
8 /**
9  * struct ecdsa_public_key - ECDSA public key properties
10  *
11  * The struct has pointers to the (x, y) curve coordinates to an ECDSA public
12  * key, as well as the name of the ECDSA curve. The size of the key is inferred
13  * from the 'curve_name'
14  */
15 struct ecdsa_public_key {
16 	const char *curve_name;	/* Name of curve, e.g. "prime256v1" */
17 	const void *x;		/* x coordinate of public key */
18 	const void *y;		/* y coordinate of public key */
19 	unsigned int size_bits;	/* key size in bits, derived from curve name */
20 };
21 
22 struct ecdsa_ops {
23 	/**
24 	 * Verify signature of hash against given public key
25 	 *
26 	 * @dev:	ECDSA Device
27 	 * @pubkey:	ECDSA public key
28 	 * @hash:	Hash of binary image
29 	 * @hash_len:	Length of hash in bytes
30 	 * @signature:	Signature in a raw (R, S) point pair
31 	 * @sig_len:	Length of signature in bytes
32 	 *
33 	 * This function verifies that the 'signature' of the given 'hash' was
34 	 * signed by the private key corresponding to 'pubkey'.
35 	 */
36 	int (*verify)(struct udevice *dev, const struct ecdsa_public_key *pubkey,
37 		      const void *hash, size_t hash_len,
38 		      const void *signature, size_t sig_len);
39 };
40