Commit 1d54af13 authored by Alexandru Gagniuc's avatar Alexandru Gagniuc Committed by Patrice Chotard
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dm: crypto: Define UCLASS API for ECDSA signature verification



Define a UCLASS API for verifying ECDSA signatures. Unlike
UCLASS_MOD_EXP, which focuses strictly on modular exponentiation,
the ECDSA class focuses on verification. This is done so that it
better aligns with mach-specific implementations, such as stm32mp.
Signed-off-by: default avatarAlexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Patrick Delaunay's avatarPatrick Delaunay <patrick.delaunay@foss.st.com>
parent 59f6eb47
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2020, Alexandru Gagniuc <mr.nuke.me@gmail.com>
*/
#include <dm/device.h>
/**
* struct ecdsa_public_key - ECDSA public key properties
*
* The struct has pointers to the (x, y) curve coordinates to an ECDSA public
* key, as well as the name of the ECDSA curve. The size of the key is inferred
* from the 'curve_name'
*/
struct ecdsa_public_key {
const char *curve_name; /* Name of curve, e.g. "prime256v1" */
const void *x; /* x coordinate of public key */
const void *y; /* y coordinate of public key */
unsigned int size_bits; /* key size in bits, derived from curve name */
};
struct ecdsa_ops {
/**
* Verify signature of hash against given public key
*
* @dev: ECDSA Device
* @pubkey: ECDSA public key
* @hash: Hash of binary image
* @hash_len: Length of hash in bytes
* @signature: Signature in a raw (R, S) point pair
* @sig_len: Length of signature in bytes
*
* This function verifies that the 'signature' of the given 'hash' was
* signed by the private key corresponding to 'pubkey'.
*/
int (*verify)(struct udevice *dev, const struct ecdsa_public_key *pubkey,
const void *hash, size_t hash_len,
const void *signature, size_t sig_len);
};
......@@ -47,6 +47,7 @@ enum uclass_id {
UCLASS_DSI_HOST, /* Display Serial Interface host */
UCLASS_DMA, /* Direct Memory Access */
UCLASS_DSA, /* Distributed (Ethernet) Switch Architecture */
UCLASS_ECDSA, /* Elliptic curve cryptographic device */
UCLASS_EFI, /* EFI managed devices */
UCLASS_ETH, /* Ethernet device */
UCLASS_ETH_PHY, /* Ethernet PHY device */
......
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