[PATCH v4 15/16] crypto: add ECDSA support

[Ahmad Fatoum]

On 13.09.24 09:59, Sascha Hauer wrote:
> This adds ECDSA signature verification support. The code is based on the
> Linux code as of Linux-6.10. The Linux code expects the key to be in
> ASN.1 encoded format. We don't need this in barebox as directly compile
> the x and y key values into the binary, so this is left out.
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>

Acked-by: Ahmad Fatoum <a.fatoum at pengutronix.de>

Some minor comments below.

> diff --git a/crypto/public-keys.c b/crypto/public-keys.c
> index dc51ef18f8..bab608be17 100644
> --- a/crypto/public-keys.c
> +++ b/crypto/public-keys.c
> @@ -1,6 +1,7 @@
>  #include <common.h>
>  #include <crypto/public_key.h>
>  #include <rsa.h>
> +#include <ecdsa.h>

We should perhaps move these two into crypto/ as well.

> diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h
> index 1b91063042..ed7c74859f 100644
> --- a/include/crypto/public_key.h
> +++ b/include/crypto/public_key.h
> @@ -8,6 +8,7 @@ struct ecdsa_public_key;
>  
>  enum pulic_key_type {

s/pulic/public/

>  	PUBLIC_KEY_TYPE_RSA,
> +	PUBLIC_KEY_TYPE_ECDSA,
>  };
>  
>  struct public_key {
> diff --git a/include/ecdsa.h b/include/ecdsa.h
> new file mode 100644
> index 0000000000..1d6340c645
> --- /dev/null
> +++ b/include/ecdsa.h
> @@ -0,0 +1,42 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +#ifndef _ECDSA_H
> +#define _ECDSA_H

#include <linux/list.h>
#include <linux/types.h>

> +
> +struct ecdsa_public_key {
> +	const char *curve_name;	/* Name of curve, e.g. "prime256v1" */
> +	const uint64_t *x;	/* x coordinate of public key */
> +	const uint64_t *y;	/* y coordinate of public key */
> +	unsigned int size_bits;	/* key size in bits, derived from curve name */
> +	struct list_head list;
> +};

Cheers,
Ahmad

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