[v10,1/9] crypto: Add support for ECDSA signature verification

From: Stefan Berger <stefanb@linux.ibm.com>

Add support for parsing the parameters of a NIST P256 or NIST P192 key.
Enable signature verification using these keys. The new module is
enabled with CONFIG_ECDSA:
  Elliptic Curve Digital Signature Algorithm (NIST P192, P256 etc.)
  is A NIST cryptographic standard algorithm. Only signature verification
  is implemented.

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>

---
v8->v9:
  - unregister nist_p192 curve if nist_p256 cannot be registered
---
 crypto/Kconfig               |  10 +
 crypto/Makefile              |   6 +
 crypto/ecc.c                 |  13 +-
 crypto/ecc.h                 |  28 +++
 crypto/ecdsa.c               | 369 +++++++++++++++++++++++++++++++++++
 crypto/ecdsasignature.asn1   |   4 +
 crypto/testmgr.c             |  12 ++
 crypto/testmgr.h             | 267 +++++++++++++++++++++++++
 include/linux/oid_registry.h |   6 +-
 9 files changed, 703 insertions(+), 12 deletions(-)
 create mode 100644 crypto/ecdsa.c
 create mode 100644 crypto/ecdsasignature.asn1

On Thu, Mar 04, 2021 at 07:51:55PM -0500, Stefan Berger wrote:
> From: Stefan Berger <stefanb@linux.ibm.com>
> 
> Add support for parsing the parameters of a NIST P256 or NIST P192 key.
> Enable signature verification using these keys. The new module is
> enabled with CONFIG_ECDSA:
>   Elliptic Curve Digital Signature Algorithm (NIST P192, P256 etc.)
>   is A NIST cryptographic standard algorithm. Only signature verification
>   is implemented.
> 
> Cc: Herbert Xu <herbert@gondor.apana.org.au>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: linux-crypto@vger.kernel.org
> Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
> Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
> 

Extra new line.

> ---

Also, noticed some other tidbits.

> v8->v9:
>   - unregister nist_p192 curve if nist_p256 cannot be registered
> ---
>  crypto/Kconfig               |  10 +
>  crypto/Makefile              |   6 +
>  crypto/ecc.c                 |  13 +-
>  crypto/ecc.h                 |  28 +++
>  crypto/ecdsa.c               | 369 +++++++++++++++++++++++++++++++++++
>  crypto/ecdsasignature.asn1   |   4 +
>  crypto/testmgr.c             |  12 ++
>  crypto/testmgr.h             | 267 +++++++++++++++++++++++++
>  include/linux/oid_registry.h |   6 +-
>  9 files changed, 703 insertions(+), 12 deletions(-)
>  create mode 100644 crypto/ecdsa.c
>  create mode 100644 crypto/ecdsasignature.asn1
> 
> diff --git a/crypto/Kconfig b/crypto/Kconfig
> index a367fcfeb5d4..a31df40591f5 100644
> --- a/crypto/Kconfig
> +++ b/crypto/Kconfig
> @@ -247,6 +247,16 @@ config CRYPTO_ECDH
>  	help
>  	  Generic implementation of the ECDH algorithm
>  
> +config CRYPTO_ECDSA
> +	tristate "ECDSA (NIST P192, P256 etc.) algorithm"
> +	select CRYPTO_ECC
> +	select CRYPTO_AKCIPHER
> +	select ASN1
> +	help
> +	  Elliptic Curve Digital Signature Algorithm (NIST P192, P256 etc.)
> +	  is A NIST cryptographic standard algorithm. Only signature verification
> +	  is implemented.
> +
>  config CRYPTO_ECRDSA
>  	tristate "EC-RDSA (GOST 34.10) algorithm"
>  	select CRYPTO_ECC
> diff --git a/crypto/Makefile b/crypto/Makefile
> index b279483fba50..982066c6bdfb 100644
> --- a/crypto/Makefile
> +++ b/crypto/Makefile
> @@ -50,6 +50,12 @@ sm2_generic-y += sm2.o
>  
>  obj-$(CONFIG_CRYPTO_SM2) += sm2_generic.o
>  
> +$(obj)/ecdsasignature.asn1.o: $(obj)/ecdsasignature.asn1.c $(obj)/ecdsasignature.asn1.h
> +$(obj)/ecdsa.o: $(obj)/ecdsasignature.asn1.h
> +ecdsa_generic-y += ecdsa.o
> +ecdsa_generic-y += ecdsasignature.asn1.o
> +obj-$(CONFIG_CRYPTO_ECDSA) += ecdsa_generic.o
> +
>  crypto_acompress-y := acompress.o
>  crypto_acompress-y += scompress.o
>  obj-$(CONFIG_CRYPTO_ACOMP2) += crypto_acompress.o
> diff --git a/crypto/ecc.c b/crypto/ecc.c
> index c80aa25994a0..25e79fd70566 100644
> --- a/crypto/ecc.c
> +++ b/crypto/ecc.c
> @@ -42,7 +42,7 @@ typedef struct {
>  	u64 m_high;
>  } uint128_t;
>  
> -static inline const struct ecc_curve *ecc_get_curve(unsigned int curve_id)
> +const struct ecc_curve *ecc_get_curve(unsigned int curve_id)
>  {
>  	switch (curve_id) {
>  	/* In FIPS mode only allow P256 and higher */
> @@ -54,6 +54,7 @@ static inline const struct ecc_curve *ecc_get_curve(unsigned int curve_id)
>  		return NULL;
>  	}
>  }
> +EXPORT_SYMBOL(ecc_get_curve);
>  
>  static u64 *ecc_alloc_digits_space(unsigned int ndigits)
>  {
> @@ -1281,16 +1282,6 @@ void ecc_point_mult_shamir(const struct ecc_point *result,
>  }
>  EXPORT_SYMBOL(ecc_point_mult_shamir);
>  
> -static inline void ecc_swap_digits(const u64 *in, u64 *out,
> -				   unsigned int ndigits)
> -{
> -	const __be64 *src = (__force __be64 *)in;
> -	int i;
> -
> -	for (i = 0; i < ndigits; i++)
> -		out[i] = be64_to_cpu(src[ndigits - 1 - i]);
> -}
> -
>  static int __ecc_is_key_valid(const struct ecc_curve *curve,
>  			      const u64 *private_key, unsigned int ndigits)
>  {
> diff --git a/crypto/ecc.h b/crypto/ecc.h
> index d4e546b9ad79..2ea86dfb5cf7 100644
> --- a/crypto/ecc.h
> +++ b/crypto/ecc.h
> @@ -33,6 +33,8 @@
>  
>  #define ECC_DIGITS_TO_BYTES_SHIFT 3
>  
> +#define ECC_MAX_BYTES (ECC_MAX_DIGITS << ECC_DIGITS_TO_BYTES_SHIFT)
> +
>  /**
>   * struct ecc_point - elliptic curve point in affine coordinates
>   *
> @@ -70,6 +72,32 @@ struct ecc_curve {
>  	u64 *b;
>  };
>  
> +/**
> + * ecc_swap_digits() - Copy ndigits from big endian array to native array
> + *

You should not have a separating line before the parameters.

> + * @in:       input array

"Input array" (capital letter)

> + * @out:      output array
> + * @ndigits:  number of digits to copy
> + */
> +static inline void ecc_swap_digits(const u64 *in, u64 *out,
> +				   unsigned int ndigits)

Put to the same line.

Similar issues repeat over the patch.

> +{
> +	const __be64 *src = (__force __be64 *)in;
> +	int i;
> +
> +	for (i = 0; i < ndigits; i++)
> +		out[i] = be64_to_cpu(src[ndigits - 1 - i]);
> +}
> +
> +/**
> + * ecc_get_curve()  - Get a curve given its curve_id
> + *
> + * @curve_id:  Id of the curve
> + *
> + * Returns pointer to the curve data, NULL if curve is not available
> + */
> +const struct ecc_curve *ecc_get_curve(unsigned int curve_id);
> +
>  /**
>   * ecc_is_key_valid() - Validate a given ECDH private key
>   *
> diff --git a/crypto/ecdsa.c b/crypto/ecdsa.c
> new file mode 100644
> index 000000000000..04fbb3d2abc5
> --- /dev/null
> +++ b/crypto/ecdsa.c
> @@ -0,0 +1,369 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (c) 2021 IBM Corporation
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are
> + * met:
> + *  * Redistributions of source code must retain the above copyright
> + *   notice, this list of conditions and the following disclaimer.
> + *  * Redistributions in binary form must reproduce the above copyright
> + *    notice, this list of conditions and the following disclaimer in the
> + *    documentation and/or other materials provided with the distribution.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> + */

This license platter is redundant, given SPDX.


> +
> +#include <linux/module.h>
> +#include <crypto/internal/akcipher.h>
> +#include <crypto/akcipher.h>
> +#include <crypto/ecdh.h>
> +#include <linux/asn1_decoder.h>
> +#include <linux/scatterlist.h>
> +
> +#include "ecc.h"
> +#include "ecdsasignature.asn1.h"
> +
> +struct ecc_ctx {
> +	unsigned int curve_id;
> +	const struct ecc_curve *curve;
> +
> +	bool pub_key_set;
> +	u64 x[ECC_MAX_DIGITS]; /* pub key x and y coordinates */
> +	u64 y[ECC_MAX_DIGITS];
> +	struct ecc_point pub_key;
> +};
> +
> +struct ecdsa_signature_ctx {
> +	const struct ecc_curve *curve;
> +	u64 r[ECC_MAX_DIGITS];
> +	u64 s[ECC_MAX_DIGITS];
> +};
> +
> +/*
> + * Get the r and s components of a signature from the X509 certificate.
> + */
> +static int ecdsa_get_signature_rs(u64 *dest, size_t hdrlen, unsigned char tag,
> +				  const void *value, size_t vlen,
> +				  unsigned int ndigits)
> +{
> +	size_t keylen = ndigits * sizeof(u64);
> +	ssize_t diff = vlen - keylen;
> +	const char *d = value;
> +	u8 rs[ECC_MAX_BYTES];
> +
> +	if (!value || !vlen)
> +		return -EINVAL;
> +
> +	/* diff = 0: 'value' has exacly the right size
> +	 * diff > 0: 'value' has too many bytes; one leading zero is allowed that
> +	 *           makes the value a positive integer; error on more
> +	 * diff < 0: 'value' is missing leading zeros, which we add
> +	 */
> +	if (diff > 0) {
> +		/* skip over leading zeros that make 'value' a positive int */
> +		if (*d == 0) {
> +			vlen -= 1;
> +			diff--;
> +			d++;
> +		}
> +		if (diff)
> +			return -EINVAL;
> +	}
> +	if (-diff >= keylen)
> +		return -EINVAL;
> +
> +	if (diff) {
> +		/* leading zeros not given in 'value' */
> +		memset(rs, 0, -diff);
> +	}
> +
> +	memcpy(&rs[-diff], d, vlen);
> +
> +	ecc_swap_digits((u64 *)rs, dest, ndigits);
> +
> +	return 0;
> +}
> +
> +int ecdsa_get_signature_r(void *context, size_t hdrlen, unsigned char tag,
> +			const void *value, size_t vlen)
> +{
> +	struct ecdsa_signature_ctx *sig = context;
> +
> +	return ecdsa_get_signature_rs(sig->r, hdrlen, tag, value, vlen,
> +				      sig->curve->g.ndigits);
> +}
> +
> +int ecdsa_get_signature_s(void *context, size_t hdrlen, unsigned char tag,
> +			  const void *value, size_t vlen)
> +{
> +	struct ecdsa_signature_ctx *sig = context;
> +
> +	return ecdsa_get_signature_rs(sig->s, hdrlen, tag, value, vlen,
> +				      sig->curve->g.ndigits);
> +}
> +
> +static int _ecdsa_verify(struct ecc_ctx *ctx, const u64 *hash,
> +			 const u64 *r, const u64 *s)
> +{
> +	const struct ecc_curve *curve = ctx->curve;
> +	unsigned int ndigits = curve->g.ndigits;
> +	u64 s1[ECC_MAX_DIGITS];
> +	u64 u1[ECC_MAX_DIGITS];
> +	u64 u2[ECC_MAX_DIGITS];
> +	u64 x1[ECC_MAX_DIGITS];
> +	u64 y1[ECC_MAX_DIGITS];
> +	struct ecc_point res = ECC_POINT_INIT(x1, y1, ndigits);
> +
> +	/* 0 < r < n  and 0 < s < n */
> +	if (vli_is_zero(r, ndigits) || vli_cmp(r, curve->n, ndigits) >= 0 ||
> +	    vli_is_zero(s, ndigits) || vli_cmp(s, curve->n, ndigits) >= 0)
> +		return -EBADMSG;
> +
> +	/* hash is given */
> +	pr_devel("hash : %016llx %016llx ... %016llx\n",
> +		 hash[ndigits - 1], hash[ndigits - 2], hash[0]);
> +
> +	/* s1 = (s^-1) mod n */
> +	vli_mod_inv(s1, s, curve->n, ndigits);
> +	/* u1 = (hash * s1) mod n */
> +	vli_mod_mult_slow(u1, hash, s1, curve->n, ndigits);
> +	/* u2 = (r * s1) mod n */
> +	vli_mod_mult_slow(u2, r, s1, curve->n, ndigits);
> +	/* res = u1*G + u2 * pub_key */
> +	ecc_point_mult_shamir(&res, u1, &curve->g, u2, &ctx->pub_key, curve);
> +
> +	/* res.x = res.x mod n (if res.x > order) */
> +	if (unlikely(vli_cmp(res.x, curve->n, ndigits) == 1))
> +		/* faster alternative for NIST p256 & p192 */
> +		vli_sub(res.x, res.x, curve->n, ndigits);
> +
> +	if (!vli_cmp(res.x, r, ndigits))
> +		return 0;
> +
> +	return -EKEYREJECTED;
> +}
> +
> +/*
> + * Verify an ECDSA signature.
> + */
> +static int ecdsa_verify(struct akcipher_request *req)
> +{
> +	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
> +	struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm);
> +	size_t keylen = ctx->curve->g.ndigits * sizeof(u64);
> +	struct ecdsa_signature_ctx sig_ctx = {
> +		.curve = ctx->curve,
> +	};
> +	u8 rawhash[ECC_MAX_BYTES];
> +	u64 hash[ECC_MAX_DIGITS];
> +	unsigned char *buffer;
> +	ssize_t diff;
> +	int ret;
> +
> +	if (unlikely(!ctx->pub_key_set))
> +		return -EINVAL;
> +
> +	buffer = kmalloc(req->src_len + req->dst_len, GFP_KERNEL);
> +	if (!buffer)
> +		return -ENOMEM;
> +
> +	sg_pcopy_to_buffer(req->src,
> +		sg_nents_for_len(req->src, req->src_len + req->dst_len),
> +		buffer, req->src_len + req->dst_len, 0);
> +
> +	ret = asn1_ber_decoder(&ecdsasignature_decoder, &sig_ctx,
> +			       buffer, req->src_len);
> +	if (ret < 0)
> +		goto error;
> +
> +	/* if the hash is shorter then we will add leading zeros to fit to ndigits */
> +	diff = keylen - req->dst_len;
> +	if (diff >= 0) {
> +		if (diff)
> +			memset(rawhash, 0, diff);
> +		memcpy(&rawhash[diff], buffer + req->src_len, req->dst_len);
> +	} else if (diff < 0) {
> +		/* given hash is longer, we take the left-most bytes */
> +		memcpy(&rawhash, buffer + req->src_len, keylen);
> +	}
> +
> +	ecc_swap_digits((u64 *)rawhash, hash, ctx->curve->g.ndigits);
> +
> +	ret = _ecdsa_verify(ctx, hash, sig_ctx.r, sig_ctx.s);
> +
> +error:
> +	kfree(buffer);
> +
> +	return ret;
> +}
> +
> +static int ecdsa_ecc_ctx_init(struct ecc_ctx *ctx, unsigned int curve_id)
> +{
> +	ctx->curve_id = curve_id;
> +	ctx->curve = ecc_get_curve(curve_id);
> +	if (!ctx->curve)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +
> +static void ecdsa_ecc_ctx_deinit(struct ecc_ctx *ctx)
> +{
> +	ctx->pub_key_set = false;
> +}
> +
> +static int ecdsa_ecc_ctx_reset(struct ecc_ctx *ctx)
> +{
> +	unsigned int curve_id = ctx->curve_id;
> +	int ret;
> +
> +	ecdsa_ecc_ctx_deinit(ctx);
> +	ret = ecdsa_ecc_ctx_init(ctx, curve_id);
> +	if (ret == 0)
> +		ctx->pub_key = ECC_POINT_INIT(ctx->x, ctx->y,
> +					      ctx->curve->g.ndigits);
> +	return ret;
> +}
> +
> +/*
> + * Set the public key given the raw uncompressed key data from an X509
> + * certificate. The key data contain the concatenated X and Y coordinates of
> + * the public key.
> + */
> +static int ecdsa_set_pub_key(struct crypto_akcipher *tfm,
> +			     const void *key, unsigned int keylen)
> +{
> +	struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm);
> +	const unsigned char *d = key;
> +	const u64 *digits = (const u64 *)&d[1];
> +	unsigned int ndigits;
> +	int ret;
> +
> +	ret = ecdsa_ecc_ctx_reset(ctx);
> +	if (ret < 0)
> +		return ret;
> +
> +	if (keylen < 1 || (((keylen - 1) >> 1) % sizeof(u64)) != 0)
> +		return -EINVAL;
> +	/* we only accept uncompressed format indicated by '4' */
> +	if (d[0] != 4)
> +		return -EINVAL;
> +
> +	keylen--;
> +	ndigits = (keylen >> 1) / sizeof(u64);
> +	if (ndigits != ctx->curve->g.ndigits)
> +		return -EINVAL;
> +
> +	ecc_swap_digits(digits, ctx->pub_key.x, ndigits);
> +	ecc_swap_digits(&digits[ndigits], ctx->pub_key.y, ndigits);
> +	ret = ecc_is_pubkey_valid_full(ctx->curve, &ctx->pub_key);
> +
> +	ctx->pub_key_set = ret == 0;
> +
> +	return ret;
> +}
> +
> +static void ecdsa_exit_tfm(struct crypto_akcipher *tfm)
> +{
> +	struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm);
> +
> +	ecdsa_ecc_ctx_deinit(ctx);
> +}
> +
> +static unsigned int ecdsa_max_size(struct crypto_akcipher *tfm)
> +{
> +	struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm);
> +
> +	return ctx->pub_key.ndigits << ECC_DIGITS_TO_BYTES_SHIFT;
> +}
> +
> +static int ecdsa_nist_p256_init_tfm(struct crypto_akcipher *tfm)
> +{
> +	struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm);
> +
> +	return ecdsa_ecc_ctx_init(ctx, ECC_CURVE_NIST_P256);
> +}
> +
> +static struct akcipher_alg ecdsa_nist_p256 = {
> +	.verify = ecdsa_verify,
> +	.set_pub_key = ecdsa_set_pub_key,
> +	.max_size = ecdsa_max_size,
> +	.init = ecdsa_nist_p256_init_tfm,
> +	.exit = ecdsa_exit_tfm,
> +	.base = {
> +		.cra_name = "ecdsa-nist-p256",
> +		.cra_driver_name = "ecdsa-nist-p256-generic",
> +		.cra_priority = 100,
> +		.cra_module = THIS_MODULE,
> +		.cra_ctxsize = sizeof(struct ecc_ctx),
> +	},
> +};
> +
> +static int ecdsa_nist_p192_init_tfm(struct crypto_akcipher *tfm)
> +{
> +	struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm);
> +
> +	return ecdsa_ecc_ctx_init(ctx, ECC_CURVE_NIST_P192);
> +}
> +
> +static struct akcipher_alg ecdsa_nist_p192 = {
> +	.verify = ecdsa_verify,
> +	.set_pub_key = ecdsa_set_pub_key,
> +	.max_size = ecdsa_max_size,
> +	.init = ecdsa_nist_p192_init_tfm,
> +	.exit = ecdsa_exit_tfm,
> +	.base = {
> +		.cra_name = "ecdsa-nist-p192",
> +		.cra_driver_name = "ecdsa-nist-p192-generic",
> +		.cra_priority = 100,
> +		.cra_module = THIS_MODULE,
> +		.cra_ctxsize = sizeof(struct ecc_ctx),
> +	},
> +};
> +static bool ecdsa_nist_p192_registered;
> +
> +static int ecdsa_init(void)
> +{
> +	int ret;
> +
> +	/* NIST p192 may not be available in FIPS mode */
> +	ret = crypto_register_akcipher(&ecdsa_nist_p192);
> +	ecdsa_nist_p192_registered = ret == 0;
> +
> +	ret = crypto_register_akcipher(&ecdsa_nist_p256);
> +	if (ret)
> +		goto nist_p256_error;
> +	return 0;
> +
> +nist_p256_error:
> +	if (ecdsa_nist_p192_registered)
> +		crypto_unregister_akcipher(&ecdsa_nist_p192);
> +	return ret;
> +}
> +
> +static void ecdsa_exit(void)
> +{
> +	if (ecdsa_nist_p192_registered)
> +		crypto_unregister_akcipher(&ecdsa_nist_p192);
> +	crypto_unregister_akcipher(&ecdsa_nist_p256);
> +}
> +
> +subsys_initcall(ecdsa_init);

Why not module_initcall()?

> +module_exit(ecdsa_exit);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Stefan Berger <stefanb@linux.ibm.com>");

Remove MODULE_AUTHOR(). It's redundant because of Git.

> +MODULE_DESCRIPTION("ECDSA generic algorithm");
> +MODULE_ALIAS_CRYPTO("ecdsa-generic");
> diff --git a/crypto/ecdsasignature.asn1 b/crypto/ecdsasignature.asn1
> new file mode 100644
> index 000000000000..621ab754fb9f
> --- /dev/null
> +++ b/crypto/ecdsasignature.asn1
> @@ -0,0 +1,4 @@
> +ECDSASignature ::= SEQUENCE {
> +	r	INTEGER ({ ecdsa_get_signature_r }),
> +	s	INTEGER ({ ecdsa_get_signature_s })
> +}
> diff --git a/crypto/testmgr.c b/crypto/testmgr.c
> index 321e38eef51b..2607602f9de5 100644
> --- a/crypto/testmgr.c
> +++ b/crypto/testmgr.c
> @@ -4913,6 +4913,18 @@ static const struct alg_test_desc alg_test_descs[] = {
>  		.suite = {
>  			.kpp = __VECS(ecdh_tv_template)
>  		}
> +	}, {
> +		.alg = "ecdsa-nist-p192",
> +		.test = alg_test_akcipher,
> +		.suite = {
> +			.akcipher = __VECS(ecdsa_nist_p192_tv_template)
> +		}
> +	}, {
> +		.alg = "ecdsa-nist-p256",
> +		.test = alg_test_akcipher,
> +		.suite = {
> +			.akcipher = __VECS(ecdsa_nist_p256_tv_template)
> +		}
>  	}, {
>  		.alg = "ecrdsa",
>  		.test = alg_test_akcipher,
> diff --git a/crypto/testmgr.h b/crypto/testmgr.h
> index 8c83811c0e35..2adcc0dc0bdd 100644
> --- a/crypto/testmgr.h
> +++ b/crypto/testmgr.h
> @@ -566,6 +566,273 @@ static const struct akcipher_testvec rsa_tv_template[] = {
>  	}
>  };
>  
> +/*
> + * ECDSA test vectors.
> + */
> +static const struct akcipher_testvec ecdsa_nist_p192_tv_template[] = {
> +	{
> +	.key =
> +	"\x04\xf7\x46\xf8\x2f\x15\xf6\x22\x8e\xd7\x57\x4f\xcc\xe7\xbb\xc1"
> +	"\xd4\x09\x73\xcf\xea\xd0\x15\x07\x3d\xa5\x8a\x8a\x95\x43\xe4\x68"
> +	"\xea\xc6\x25\xc1\xc1\x01\x25\x4c\x7e\xc3\x3c\xa6\x04\x0a\xe7\x08"
> +	"\x98",
> +	.key_len = 49,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x01",
> +	.param_len = 21,
> +	.m =
> +	"\xcd\xb9\xd2\x1c\xb7\x6f\xcd\x44\xb3\xfd\x63\xea\xa3\x66\x7f\xae"
> +	"\x63\x85\xe7\x82",
> +	.m_size = 20,
> +	.algo = OID_id_ecdsa_with_sha1,
> +	.c =
> +	"\x30\x35\x02\x19\x00\xba\xe5\x93\x83\x6e\xb6\x3b\x63\xa0\x27\x91"
> +	"\xc6\xf6\x7f\xc3\x09\xad\x59\xad\x88\x27\xd6\x92\x6b\x02\x18\x10"
> +	"\x68\x01\x9d\xba\xce\x83\x08\xef\x95\x52\x7b\xa0\x0f\xe4\x18\x86"
> +	"\x80\x6f\xa5\x79\x77\xda\xd0",
> +	.c_size = 55,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	}, {
> +	.key =
> +	"\x04\xb6\x4b\xb1\xd1\xac\xba\x24\x8f\x65\xb2\x60\x00\x90\xbf\xbd"
> +	"\x78\x05\x73\xe9\x79\x1d\x6f\x7c\x0b\xd2\xc3\x93\xa7\x28\xe1\x75"
> +	"\xf7\xd5\x95\x1d\x28\x10\xc0\x75\x50\x5c\x1a\x4f\x3f\x8f\xa5\xee"
> +	"\xa3",
> +	.key_len = 49,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x01",
> +	.param_len = 21,
> +	.m =
> +	"\x8d\xd6\xb8\x3e\xe5\xff\x23\xf6\x25\xa2\x43\x42\x74\x45\xa7\x40"
> +	"\x3a\xff\x2f\xe1\xd3\xf6\x9f\xe8\x33\xcb\x12\x11",
> +	.m_size = 28,
> +	.algo = OID_id_ecdsa_with_sha224,
> +	.c =
> +	"\x30\x34\x02\x18\x5a\x8b\x82\x69\x7e\x8a\x0a\x09\x14\xf8\x11\x2b"
> +	"\x55\xdc\xae\x37\x83\x7b\x12\xe6\xb6\x5b\xcb\xd4\x02\x18\x6a\x14"
> +	"\x4f\x53\x75\xc8\x02\x48\xeb\xc3\x92\x0f\x1e\x72\xee\xc4\xa3\xe3"
> +	"\x5c\x99\xdb\x92\x5b\x36",
> +	.c_size = 54,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	}, {
> +	.key =
> +	"\x04\xe2\x51\x24\x9b\xf7\xb6\x32\x82\x39\x66\x3d\x5b\xec\x3b\xae"
> +	"\x0c\xd5\xf2\x67\xd1\xc7\xe1\x02\xe4\xbf\x90\x62\xb8\x55\x75\x56"
> +	"\x69\x20\x5e\xcb\x4e\xca\x33\xd6\xcb\x62\x6b\x94\xa9\xa2\xe9\x58"
> +	"\x91",
> +	.key_len = 49,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x01",
> +	.param_len = 21,
> +	.m =
> +	"\x35\xec\xa1\xa0\x9e\x14\xde\x33\x03\xb6\xf6\xbd\x0c\x2f\xb2\xfd"
> +	"\x1f\x27\x82\xa5\xd7\x70\x3f\xef\xa0\x82\x69\x8e\x73\x31\x8e\xd7",
> +	.m_size = 32,
> +	.algo = OID_id_ecdsa_with_sha256,
> +	.c =
> +	"\x30\x35\x02\x18\x3f\x72\x3f\x1f\x42\xd2\x3f\x1d\x6b\x1a\x58\x56"
> +	"\xf1\x8f\xf7\xfd\x01\x48\xfb\x5f\x72\x2a\xd4\x8f\x02\x19\x00\xb3"
> +	"\x69\x43\xfd\x48\x19\x86\xcf\x32\xdd\x41\x74\x6a\x51\xc7\xd9\x7d"
> +	"\x3a\x97\xd9\xcd\x1a\x6a\x49",
> +	.c_size = 55,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	}, {
> +	.key =
> +	"\x04\x5a\x13\xfe\x68\x86\x4d\xf4\x17\xc7\xa4\xe5\x8c\x65\x57\xb7"
> +	"\x03\x73\x26\x57\xfb\xe5\x58\x40\xd8\xfd\x49\x05\xab\xf1\x66\x1f"
> +	"\xe2\x9d\x93\x9e\xc2\x22\x5a\x8b\x4f\xf3\x77\x22\x59\x7e\xa6\x4e"
> +	"\x8b",
> +	.key_len = 49,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x01",
> +	.param_len = 21,
> +	.m =
> +	"\x9d\x2e\x1a\x8f\xed\x6c\x4b\x61\xae\xac\xd5\x19\x79\xce\x67\xf9"
> +	"\xa0\x34\xeb\xb0\x81\xf9\xd9\xdc\x6e\xb3\x5c\xa8\x69\xfc\x8a\x61"
> +	"\x39\x81\xfb\xfd\x5c\x30\x6b\xa8\xee\xed\x89\xaf\xa3\x05\xe4\x78",
> +	.m_size = 48,
> +	.algo = OID_id_ecdsa_with_sha384,
> +	.c =
> +	"\x30\x35\x02\x19\x00\xf0\xa3\x38\xce\x2b\xf8\x9d\x1a\xcf\x7f\x34"
> +	"\xb4\xb4\xe5\xc5\x00\xdd\x15\xbb\xd6\x8c\xa7\x03\x78\x02\x18\x64"
> +	"\xbc\x5a\x1f\x82\x96\x61\xd7\xd1\x01\x77\x44\x5d\x53\xa4\x7c\x93"
> +	"\x12\x3b\x3b\x28\xfb\x6d\xe1",
> +	.c_size = 55,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	}, {
> +	.key =
> +	"\x04\xd5\xf2\x6e\xc3\x94\x5c\x52\xbc\xdf\x86\x6c\x14\xd1\xca\xea"
> +	"\xcc\x72\x3a\x8a\xf6\x7a\x3a\x56\x36\x3b\xca\xc6\x94\x0e\x17\x1d"
> +	"\x9e\xa0\x58\x28\xf9\x4b\xe6\xd1\xa5\x44\x91\x35\x0d\xe7\xf5\x11"
> +	"\x57",
> +	.key_len = 49,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x01",
> +	.param_len = 21,
> +	.m =
> +	"\xd5\x4b\xe9\x36\xda\xd8\x6e\xc0\x50\x03\xbe\x00\x43\xff\xf0\x23"
> +	"\xac\xa2\x42\xe7\x37\x77\x79\x52\x8f\x3e\xc0\x16\xc1\xfc\x8c\x67"
> +	"\x16\xbc\x8a\x5d\x3b\xd3\x13\xbb\xb6\xc0\x26\x1b\xeb\x33\xcc\x70"
> +	"\x4a\xf2\x11\x37\xe8\x1b\xba\x55\xac\x69\xe1\x74\x62\x7c\x6e\xb5",
> +	.m_size = 64,
> +	.algo = OID_id_ecdsa_with_sha512,
> +	.c =
> +	"\x30\x35\x02\x19\x00\x88\x5b\x8f\x59\x43\xbf\xcf\xc6\xdd\x3f\x07"
> +	"\x87\x12\xa0\xd4\xac\x2b\x11\x2d\x1c\xb6\x06\xc9\x6c\x02\x18\x73"
> +	"\xb4\x22\x9a\x98\x73\x3c\x83\xa9\x14\x2a\x5e\xf5\xe5\xfb\x72\x28"
> +	"\x6a\xdf\x97\xfd\x82\x76\x24",
> +	.c_size = 55,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	},
> +};
> +
> +static const struct akcipher_testvec ecdsa_nist_p256_tv_template[] = {
> +	{
> +	.key =
> +	"\x04\xb9\x7b\xbb\xd7\x17\x64\xd2\x7e\xfc\x81\x5d\x87\x06\x83\x41"
> +	"\x22\xd6\x9a\xaa\x87\x17\xec\x4f\x63\x55\x2f\x94\xba\xdd\x83\xe9"
> +	"\x34\x4b\xf3\xe9\x91\x13\x50\xb6\xcb\xca\x62\x08\xe7\x3b\x09\xdc"
> +	"\xc3\x63\x4b\x2d\xb9\x73\x53\xe4\x45\xe6\x7c\xad\xe7\x6b\xb0\xe8"
> +	"\xaf",
> +	.key_len = 65,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x07",
> +	.param_len = 21,
> +	.m =
> +	"\xc2\x2b\x5f\x91\x78\x34\x26\x09\x42\x8d\x6f\x51\xb2\xc5\xaf\x4c"
> +	"\x0b\xde\x6a\x42",
> +	.m_size = 20,
> +	.algo = OID_id_ecdsa_with_sha1,
> +	.c =
> +	"\x30\x46\x02\x21\x00\xf9\x25\xce\x9f\x3a\xa6\x35\x81\xcf\xd4\xe7"
> +	"\xb7\xf0\x82\x56\x41\xf7\xd4\xad\x8d\x94\x5a\x69\x89\xee\xca\x6a"
> +	"\x52\x0e\x48\x4d\xcc\x02\x21\x00\xd7\xe4\xef\x52\x66\xd3\x5b\x9d"
> +	"\x8a\xfa\x54\x93\x29\xa7\x70\x86\xf1\x03\x03\xf3\x3b\xe2\x73\xf7"
> +	"\xfb\x9d\x8b\xde\xd4\x8d\x6f\xad",
> +	.c_size = 72,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	}, {
> +	.key =
> +	"\x04\x8b\x6d\xc0\x33\x8e\x2d\x8b\x67\xf5\xeb\xc4\x7f\xa0\xf5\xd9"
> +	"\x7b\x03\xa5\x78\x9a\xb5\xea\x14\xe4\x23\xd0\xaf\xd7\x0e\x2e\xa0"
> +	"\xc9\x8b\xdb\x95\xf8\xb3\xaf\xac\x00\x2c\x2c\x1f\x7a\xfd\x95\x88"
> +	"\x43\x13\xbf\xf3\x1c\x05\x1a\x14\x18\x09\x3f\xd6\x28\x3e\xc5\xa0"
> +	"\xd4",
> +	.key_len = 65,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x07",
> +	.param_len = 21,
> +	.m =
> +	"\x1a\x15\xbc\xa3\xe4\xed\x3a\xb8\x23\x67\xc6\xc4\x34\xf8\x6c\x41"
> +	"\x04\x0b\xda\xc5\x77\xfa\x1c\x2d\xe6\x2c\x3b\xe0",
> +	.m_size = 28,
> +	.algo = OID_id_ecdsa_with_sha224,
> +	.c =
> +	"\x30\x44\x02\x20\x20\x43\xfa\xc0\x9f\x9d\x7b\xe7\xae\xce\x77\x59"
> +	"\x1a\xdb\x59\xd5\x34\x62\x79\xcb\x6a\x91\x67\x2e\x7d\x25\xd8\x25"
> +	"\xf5\x81\xd2\x1e\x02\x20\x5f\xf8\x74\xf8\x57\xd0\x5e\x54\x76\x20"
> +	"\x4a\x77\x22\xec\xc8\x66\xbf\x50\x05\x58\x39\x0e\x26\x92\xce\xd5"
> +	"\x2e\x8b\xde\x5a\x04\x0e",
> +	.c_size = 70,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	}, {
> +	.key =
> +	"\x04\xf1\xea\xc4\x53\xf3\xb9\x0e\x9f\x7e\xad\xe3\xea\xd7\x0e\x0f"
> +	"\xd6\x98\x9a\xca\x92\x4d\x0a\x80\xdb\x2d\x45\xc7\xec\x4b\x97\x00"
> +	"\x2f\xe9\x42\x6c\x29\xdc\x55\x0e\x0b\x53\x12\x9b\x2b\xad\x2c\xe9"
> +	"\x80\xe6\xc5\x43\xc2\x1d\x5e\xbb\x65\x21\x50\xb6\x37\xb0\x03\x8e"
> +	"\xb8",
> +	.key_len = 65,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x07",
> +	.param_len = 21,
> +	.m =
> +	"\x8f\x43\x43\x46\x64\x8f\x6b\x96\xdf\x89\xdd\xa9\x01\xc5\x17\x6b"
> +	"\x10\xa6\xd8\x39\x61\xdd\x3c\x1a\xc8\x8b\x59\xb2\xdc\x32\x7a\xa4",
> +	.m_size = 32,
> +	.algo = OID_id_ecdsa_with_sha256,
> +	.c =
> +	"\x30\x45\x02\x20\x08\x31\xfa\x74\x0d\x1d\x21\x5d\x09\xdc\x29\x63"
> +	"\xa8\x1a\xad\xfc\xac\x44\xc3\xe8\x24\x11\x2d\xa4\x91\xdc\x02\x67"
> +	"\xdc\x0c\xd0\x82\x02\x21\x00\xbd\xff\xce\xee\x42\xc3\x97\xff\xf9"
> +	"\xa9\x81\xac\x4a\x50\xd0\x91\x0a\x6e\x1b\xc4\xaf\xe1\x83\xc3\x4f"
> +	"\x2a\x65\x35\x23\xe3\x1d\xfa",
> +	.c_size = 71,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	}, {
> +	.key =
> +	"\x04\xc5\xc6\xea\x60\xc9\xce\xad\x02\x8d\xf5\x3e\x24\xe3\x52\x1d"
> +	"\x28\x47\x3b\xc3\x6b\xa4\x99\x35\x99\x11\x88\x88\xc8\xf4\xee\x7e"
> +	"\x8c\x33\x8f\x41\x03\x24\x46\x2b\x1a\x82\xf9\x9f\xe1\x97\x1b\x00"
> +	"\xda\x3b\x24\x41\xf7\x66\x33\x58\x3d\x3a\x81\xad\xcf\x16\xe9\xe2"
> +	"\x7c",
> +	.key_len = 65,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x07",
> +	.param_len = 21,
> +	.m =
> +	"\x3e\x78\x70\xfb\xcd\x66\xba\x91\xa1\x79\xff\x1e\x1c\x6b\x78\xe6"
> +	"\xc0\x81\x3a\x65\x97\x14\x84\x36\x14\x1a\x9a\xb7\xc5\xab\x84\x94"
> +	"\x5e\xbb\x1b\x34\x71\xcb\x41\xe1\xf6\xfc\x92\x7b\x34\xbb\x86\xbb",
> +	.m_size = 48,
> +	.algo = OID_id_ecdsa_with_sha384,
> +	.c =
> +	"\x30\x46\x02\x21\x00\x8e\xf3\x6f\xdc\xf8\x69\xa6\x2e\xd0\x2e\x95"
> +	"\x54\xd1\x95\x64\x93\x08\xb2\x6b\x24\x94\x48\x46\x5e\xf2\xe4\x6c"
> +	"\xc7\x94\xb1\xd5\xfe\x02\x21\x00\xeb\xa7\x80\x26\xdc\xf9\x3a\x44"
> +	"\x19\xfb\x5f\x92\xf4\xc9\x23\x37\x69\xf4\x3b\x4f\x47\xcf\x9b\x16"
> +	"\xc0\x60\x11\x92\xdc\x17\x89\x12",
> +	.c_size = 72,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	}, {
> +	.key =
> +	"\x04\xd7\x27\x46\x49\xf6\x26\x85\x12\x40\x76\x8e\xe2\xe6\x2a\x7a"
> +	"\x83\xb1\x4e\x7a\xeb\x3b\x5c\x67\x4a\xb5\xa4\x92\x8c\x69\xff\x38"
> +	"\xee\xd9\x4e\x13\x29\x59\xad\xde\x6b\xbb\x45\x31\xee\xfd\xd1\x1b"
> +	"\x64\xd3\xb5\xfc\xaf\x9b\x4b\x88\x3b\x0e\xb7\xd6\xdf\xf1\xd5\x92"
> +	"\xbf",
> +	.key_len = 65,
> +	.params =
> +	"\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48"
> +	"\xce\x3d\x03\x01\x07",
> +	.param_len = 21,
> +	.m =
> +	"\x57\xb7\x9e\xe9\x05\x0a\x8c\x1b\xc9\x13\xe5\x4a\x24\xc7\xe2\xe9"
> +	"\x43\xc3\xd1\x76\x62\xf4\x98\x1a\x9c\x13\xb0\x20\x1b\xe5\x39\xca"
> +	"\x4f\xd9\x85\x34\x95\xa2\x31\xbc\xbb\xde\xdd\x76\xbb\x61\xe3\xcf"
> +	"\x9d\xc0\x49\x7a\xf3\x7a\xc4\x7d\xa8\x04\x4b\x8d\xb4\x4d\x5b\xd6",
> +	.m_size = 64,
> +	.algo = OID_id_ecdsa_with_sha512,
> +	.c =
> +	"\x30\x45\x02\x21\x00\xb8\x6d\x87\x81\x43\xdf\xfb\x9f\x40\xea\x44"
> +	"\x81\x00\x4e\x29\x08\xed\x8c\x73\x30\x6c\x22\xb3\x97\x76\xf6\x04"
> +	"\x99\x09\x37\x4d\xfa\x02\x20\x1e\xb9\x75\x31\xf6\x04\xa5\x4d\xf8"
> +	"\x00\xdd\xab\xd4\xc0\x2b\xe6\x5c\xad\xc3\x78\x1c\xc2\xc1\x19\x76"
> +	"\x31\x79\x4a\xe9\x81\x6a\xee",
> +	.c_size = 71,
> +	.public_key_vec = true,
> +	.siggen_sigver_test = true,
> +	},
> +};
> +
>  /*
>   * EC-RDSA test vectors are generated by gost-engine.
>   */
> diff --git a/include/linux/oid_registry.h b/include/linux/oid_registry.h
> index 4462ed2c18cd..b504e2f36b25 100644
> --- a/include/linux/oid_registry.h
> +++ b/include/linux/oid_registry.h
> @@ -19,8 +19,12 @@
>  enum OID {
>  	OID_id_dsa_with_sha1,		/* 1.2.840.10030.4.3 */
>  	OID_id_dsa,			/* 1.2.840.10040.4.1 */
> -	OID_id_ecdsa_with_sha1,		/* 1.2.840.10045.4.1 */
>  	OID_id_ecPublicKey,		/* 1.2.840.10045.2.1 */
> +	OID_id_ecdsa_with_sha1,		/* 1.2.840.10045.4.1 */
> +	OID_id_ecdsa_with_sha224,	/* 1.2.840.10045.4.3.1 */
> +	OID_id_ecdsa_with_sha256,	/* 1.2.840.10045.4.3.2 */
> +	OID_id_ecdsa_with_sha384,	/* 1.2.840.10045.4.3.3 */
> +	OID_id_ecdsa_with_sha512,	/* 1.2.840.10045.4.3.4 */
>  
>  	/* PKCS#1 {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-1(1)} */
>  	OID_rsaEncryption,		/* 1.2.840.113549.1.1.1 */
> -- 
> 2.29.2
> 
> 

AFAIK< oid_registry.h updates should be separate commit, acked separately.

Please remove my ack from this, I'll have to re-review this, once the
issues have been fixed.

/Jarkko

Jarkko,

On Fri, Mar 05, 2021 at 07:05:39PM +0200, Jarkko Sakkinen wrote:
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Copyright (c) 2021 IBM Corporation
> > + *
> > + * Redistribution and use in source and binary forms, with or without
> > + * modification, are permitted provided that the following conditions are
> > + * met:
> > + *  * Redistributions of source code must retain the above copyright
> > + *   notice, this list of conditions and the following disclaimer.
> > + *  * Redistributions in binary form must reproduce the above copyright
> > + *    notice, this list of conditions and the following disclaimer in the
> > + *    documentation and/or other materials provided with the distribution.
> > + *
> > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> > + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> > + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> > + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> > + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> > + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> > + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> > + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> > + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> > + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> > + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> > + */
> 
> This license platter is redundant, given SPDX.

I think SPDX identifier supplements license plate and is machine readable
identifier, but it does not replace or making adding of license plate
redundant.

- Quoting https://spdx.dev/ids/

  "When a license defines a recommended notice to attach to files under
  that license (sometimes called a “standard header”), the SPDX project
  recommends that the standard header be included in the files, in
  addition to an SPDX ID.

  Additionally, when a file already contains a standard header or other
  license notice, the SPDX project recommends that those existing
  notices should not be removed. The SPDX ID is recommended to be used
  to supplement, not replace, existing notices in files."

- GPL license text have section on "How to Apply These Terms to Your New
  Programs" which says to add license boilerplate text and it does not
  say SPDX identifier is enough.

- Also, page https://www.kernel.org/doc/html/latest/process/license-rules.html
  does not forbid adding license plate text. (Even though it misguidedly
  says "alternative to boilerplate text" is the use of SPDX.)

- License text is a readable text and not just identifier.
  I think SPDX tag could be not legally binding in all jurisdictions.

By there reasons I believe you cannot request removing license platter
from the source and this should be author's decision.

Thanks,

On 3/5/21 2:46 PM, Vitaly Chikunov wrote:
> Jarkko,
>
> On Fri, Mar 05, 2021 at 07:05:39PM +0200, Jarkko Sakkinen wrote:
>>> +// SPDX-License-Identifier: GPL-2.0+
>>> +/*
>>> + * Copyright (c) 2021 IBM Corporation
>>> + *
>>> + * Redistribution and use in source and binary forms, with or without
>>> + * modification, are permitted provided that the following conditions are
>>> + * met:
>>> + *  * Redistributions of source code must retain the above copyright
>>> + *   notice, this list of conditions and the following disclaimer.
>>> + *  * Redistributions in binary form must reproduce the above copyright
>>> + *    notice, this list of conditions and the following disclaimer in the
>>> + *    documentation and/or other materials provided with the distribution.
>>> + *
>>> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
>>> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
>>> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
>>> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
>>> + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
>>> + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
>>> + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
>>> + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
>>> + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>>> + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>>> + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>>> + */
>> This license platter is redundant, given SPDX.
> I think SPDX identifier supplements license plate and is machine readable
> identifier, but it does not replace or making adding of license plate
> redundant.
>
> - Quoting https://spdx.dev/ids/
>
>    "When a license defines a recommended notice to attach to files under
>    that license (sometimes called a “standard header”), the SPDX project
>    recommends that the standard header be included in the files, in
>    addition to an SPDX ID.
>
>    Additionally, when a file already contains a standard header or other
>    license notice, the SPDX project recommends that those existing
>    notices should not be removed. The SPDX ID is recommended to be used
>    to supplement, not replace, existing notices in files."
>
> - GPL license text have section on "How to Apply These Terms to Your New
>    Programs" which says to add license boilerplate text and it does not
>    say SPDX identifier is enough.
>
> - Also, page https://www.kernel.org/doc/html/latest/process/license-rules.html
>    does not forbid adding license plate text. (Even though it misguidedly
>    says "alternative to boilerplate text" is the use of SPDX.)
>
> - License text is a readable text and not just identifier.
>    I think SPDX tag could be not legally binding in all jurisdictions.
>
> By there reasons I believe you cannot request removing license platter
> from the source and this should be author's decision.
>
> Thanks,
>
Thanks for looking into this. I am fine with the SPDX identifier.

Regards,

    Stefan