[PATCH v4 0/3] Add support for x509 certs with NIST p256 and p192 keys

[PATCH v4 0/3] Add support for x509 certs with NIST p256 and p192 keys

[Stefan Berger]

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

This series of patches adds support for x509 certificates signed by a CA
that uses NIST p256 or p192 keys for signing. It also adds support for
certificates where the public key is a NIST p256 or p192 key. The math
for ECDSA signature verification is also added.

Since self-signed certificates are verified upon loading, the following
script can be used for testing:

k=$(keyctl newring test @u)

while :; do
	for hash in sha1 sha224 sha256 sha384 sha512; do
		openssl req \
			-x509 \
			-${hash} \
			-newkey ec \
			-pkeyopt ec_paramgen_curve:prime256v1 \
			-keyout key.pem \
			-days 365 \
			-subj '/CN=test' \
			-nodes \
			-outform der \
			-out cert.der
		keyctl padd asymmetric testkey $k < cert.der
		if [ $? -ne 0 ]; then
			echo "ERROR"
			exit 1
		fi
	done
done

It also works with restricted keyrings where an RSA key is used to sign
a NIST P256/P192 key. Scripts for testing are here:

https://github.com/stefanberger/eckey-testing

The ECDSA signature verification will be used by IMA Appraisal where ECDSA
file signatures stored in RPM packages will use substantially less space
than if RSA signatures were to be used.

   Stefan

v3->v4:
  - split off of ecdsa crypto part; registering akcipher as "ecdsa" and
    deriving used curve from digits in parsed key

v2->v3:
  - patch 2 now includes linux/scatterlist.h

v1->v2:
  - using faster vli_sub rather than newly added vli_mod_fast to 'reduce'
    result
  - rearranged switch statements to follow after RSA
  - 3rd patch from 1st posting is now 1st patch


Stefan Berger (3):
  crypto: Add support for ECDSA signature verification
  x509: Detect sm2 keys by their parameters OID
  x509: Add support for parsing x509 certs with ECDSA keys

 crypto/Makefile                           |   9 +-
 crypto/asymmetric_keys/public_key.c       |  17 ++
 crypto/asymmetric_keys/x509_cert_parser.c |  45 +++-
 crypto/ecc.c                              | 279 ++++++++++++++++++++++
 crypto/ecc.h                              |   2 +
 crypto/ecdsasignature.asn1                |   4 +
 include/linux/oid_registry.h              |   6 +
 7 files changed, 359 insertions(+), 3 deletions(-)
 create mode 100644 crypto/ecdsasignature.asn1

-- 
2.26.2

[PATCH v4 1/3] crypto: Add support for ECDSA signature verification

[Stefan Berger]

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.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
---
 crypto/Makefile            |   9 +-
 crypto/ecc.c               | 279 +++++++++++++++++++++++++++++++++++++
 crypto/ecc.h               |   2 +
 crypto/ecdsasignature.asn1 |   4 +
 4 files changed, 293 insertions(+), 1 deletion(-)
 create mode 100644 crypto/ecdsasignature.asn1

diff --git a/crypto/Makefile b/crypto/Makefile
index b279483fba50..767f6b71aa20 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -50,6 +50,14 @@ 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)/ecc.o: $(obj)/ecdsasignature.asn1.h
+
+ecc_generic-y += ecdsasignature.asn1.o
+ecc_generic-y += ecc.o
+
+obj-$(CONFIG_CRYPTO_ECC) += ecc_generic.o
+
 crypto_acompress-y := acompress.o
 crypto_acompress-y += scompress.o
 obj-$(CONFIG_CRYPTO_ACOMP2) += crypto_acompress.o
@@ -172,7 +180,6 @@ obj-$(CONFIG_CRYPTO_USER_API_RNG) += algif_rng.o
 obj-$(CONFIG_CRYPTO_USER_API_AEAD) += algif_aead.o
 obj-$(CONFIG_CRYPTO_ZSTD) += zstd.o
 obj-$(CONFIG_CRYPTO_OFB) += ofb.o
-obj-$(CONFIG_CRYPTO_ECC) += ecc.o
 obj-$(CONFIG_CRYPTO_ESSIV) += essiv.o
 obj-$(CONFIG_CRYPTO_CURVE25519) += curve25519-generic.o
 
diff --git a/crypto/ecc.c b/crypto/ecc.c
index c80aa25994a0..3636f9d17eaf 100644
--- a/crypto/ecc.c
+++ b/crypto/ecc.c
@@ -29,13 +29,18 @@
 #include <linux/slab.h>
 #include <linux/swab.h>
 #include <linux/fips.h>
+#include <crypto/internal/akcipher.h>
+#include <crypto/akcipher.h>
 #include <crypto/ecdh.h>
 #include <crypto/rng.h>
 #include <asm/unaligned.h>
 #include <linux/ratelimit.h>
+#include <linux/asn1_decoder.h>
+#include <linux/scatterlist.h>
 
 #include "ecc.h"
 #include "ecc_curve_defs.h"
+#include "ecdsasignature.asn1.h"
 
 typedef struct {
 	u64 m_low;
@@ -1542,4 +1547,278 @@ int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits,
 }
 EXPORT_SYMBOL(crypto_ecdh_shared_secret);
 
+struct ecc_ctx {
+	const struct ecc_curve *curve;
+	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))
+		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 void ecdsa_ec_ctx_deinit(struct ecc_ctx *ctx)
+{
+	ecc_free_point(ctx->pub_key);
+	ctx->pub_key = NULL;
+}
+
+static int ecdsa_ec_ctx_reset(struct ecc_ctx *ctx)
+{
+	ecdsa_ec_ctx_deinit(ctx);
+	return 0;
+}
+
+/*
+ * 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_ec_ctx_reset(ctx);
+	if (ret < 0)
+		return ret;
+
+	if (keylen < 1 || (((keylen - 1) >> 1) % sizeof(u64)) != 0)
+		return -EINVAL;
+	/* we only accept uncompressed format */
+	if (d[0] != 4)
+		return -EINVAL;
+
+	keylen--;
+	ndigits = (keylen >> 1) / sizeof(u64);
+	switch (ndigits) {
+	case 3:
+		ctx->curve = ecc_get_curve(ECC_CURVE_NIST_P192);
+		break;
+	case 4:
+		ctx->curve = ecc_get_curve(ECC_CURVE_NIST_P256);
+		break;
+	}
+	if (!ctx->curve)
+		return -EINVAL;
+
+	ctx->pub_key = ecc_alloc_point(ndigits);
+	if (!ctx->pub_key)
+		return -ENOMEM;
+
+	ecc_swap_digits(digits, ctx->pub_key->x, ndigits);
+	ecc_swap_digits(&digits[ndigits], ctx->pub_key->y, ndigits);
+	return ecc_is_pubkey_valid_full(ctx->curve, ctx->pub_key);
+}
+
+static void ecdsa_exit_tfm(struct crypto_akcipher *tfm)
+{
+	struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm);
+
+	ecdsa_ec_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_init_tfm(struct crypto_akcipher *tfm)
+{
+	return 0;
+}
+
+static struct akcipher_alg ecdsa = {
+	.verify = ecdsa_verify,
+	.set_pub_key = ecdsa_set_pub_key,
+	.max_size = ecdsa_max_size,
+	.init = ecdsa_init_tfm,
+	.exit = ecdsa_exit_tfm,
+	.base = {
+		.cra_name = "ecdsa",
+		.cra_driver_name = "ecdsa-generic",
+		.cra_priority = 100,
+		.cra_module = THIS_MODULE,
+		.cra_ctxsize = sizeof(struct ecc_ctx),
+	},
+};
+
+static int ecdsa_init(void)
+{
+	return crypto_register_akcipher(&ecdsa);
+}
+
+static void ecdsa_exit(void)
+{
+	crypto_unregister_akcipher(&ecdsa);
+}
+
+subsys_initcall(ecdsa_init);
+module_exit(ecdsa_exit);
+
 MODULE_LICENSE("Dual BSD/GPL");
diff --git a/crypto/ecc.h b/crypto/ecc.h
index d4e546b9ad79..26d7c83908bc 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
  *
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 })
+}
-- 
2.26.2

[PATCH v4 2/3] x509: Detect sm2 keys by their parameters OID

[Stefan Berger]

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

Detect whether a key is an sm2 type of key by its OID in the parameters
array rather than assuming that everything under OID_id_ecPublicKey
is sm2, which is not the case.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: keyrings@vger.kernel.org
---
 crypto/asymmetric_keys/x509_cert_parser.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
index 52c9b455fc7d..4643fe5ed69a 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
@@ -459,6 +459,7 @@ int x509_extract_key_data(void *context, size_t hdrlen,
 			  const void *value, size_t vlen)
 {
 	struct x509_parse_context *ctx = context;
+	enum OID oid;
 
 	ctx->key_algo = ctx->last_oid;
 	switch (ctx->last_oid) {
@@ -470,7 +471,17 @@ int x509_extract_key_data(void *context, size_t hdrlen,
 		ctx->cert->pub->pkey_algo = "ecrdsa";
 		break;
 	case OID_id_ecPublicKey:
-		ctx->cert->pub->pkey_algo = "sm2";
+		if (ctx->params_size < 2)
+			return -ENOPKG;
+
+		oid = look_up_OID(ctx->params + 2, ctx->params_size - 2);
+		switch (oid) {
+		case OID_sm2:
+			ctx->cert->pub->pkey_algo = "sm2";
+			break;
+		default:
+			return -ENOPKG;
+		}
 		break;
 	default:
 		return -ENOPKG;
-- 
2.26.2

[PATCH v4 3/3] x509: Add support for parsing x509 certs with ECDSA keys

[Stefan Berger]

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

This patch adds support for parsing of x509 certificates that contain
ECDSA keys, such as NIST P256, that have been signed by a CA using any
of the current SHA hash algorithms.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: keyrings@vger.kernel.org
---
 crypto/asymmetric_keys/public_key.c       | 17 ++++++++++++
 crypto/asymmetric_keys/x509_cert_parser.c | 32 ++++++++++++++++++++++-
 include/linux/oid_registry.h              |  6 +++++
 3 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 8892908ad58c..cc5d59d2b35d 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -90,6 +90,23 @@ int software_key_determine_akcipher(const char *encoding,
 		return 0;
 	}
 
+	if (strcmp(encoding, "x962") == 0) {
+		enum OID oid;
+
+		if (pkey->paramlen < 2)
+			return -EINVAL;
+
+		oid = look_up_OID(pkey->params + 2, pkey->paramlen - 2);
+		switch (oid) {
+		case OID_id_prime192v1:
+		case OID_id_prime256v1:
+			strcpy(alg_name, "ecdsa");
+			return 0;
+		default:
+			return -EINVAL;
+		}
+	}
+
 	return -ENOPKG;
 }
 
diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
index 4643fe5ed69a..5ff891f8235d 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
@@ -227,6 +227,26 @@ int x509_note_pkey_algo(void *context, size_t hdrlen,
 		ctx->cert->sig->hash_algo = "sha224";
 		goto rsa_pkcs1;
 
+	case OID_id_ecdsa_with_sha1:
+		ctx->cert->sig->hash_algo = "sha1";
+		goto ecdsa;
+
+	case OID_id_ecdsa_with_sha224:
+		ctx->cert->sig->hash_algo = "sha224";
+		goto ecdsa;
+
+	case OID_id_ecdsa_with_sha256:
+		ctx->cert->sig->hash_algo = "sha256";
+		goto ecdsa;
+
+	case OID_id_ecdsa_with_sha384:
+		ctx->cert->sig->hash_algo = "sha384";
+		goto ecdsa;
+
+	case OID_id_ecdsa_with_sha512:
+		ctx->cert->sig->hash_algo = "sha512";
+		goto ecdsa;
+
 	case OID_gost2012Signature256:
 		ctx->cert->sig->hash_algo = "streebog256";
 		goto ecrdsa;
@@ -255,6 +275,11 @@ int x509_note_pkey_algo(void *context, size_t hdrlen,
 	ctx->cert->sig->encoding = "raw";
 	ctx->algo_oid = ctx->last_oid;
 	return 0;
+ecdsa:
+	ctx->cert->sig->pkey_algo = "ecdsa";
+	ctx->cert->sig->encoding = "x962";
+	ctx->algo_oid = ctx->last_oid;
+	return 0;
 }
 
 /*
@@ -276,7 +301,8 @@ int x509_note_signature(void *context, size_t hdrlen,
 
 	if (strcmp(ctx->cert->sig->pkey_algo, "rsa") == 0 ||
 	    strcmp(ctx->cert->sig->pkey_algo, "ecrdsa") == 0 ||
-	    strcmp(ctx->cert->sig->pkey_algo, "sm2") == 0) {
+	    strcmp(ctx->cert->sig->pkey_algo, "sm2") == 0 ||
+	    strcmp(ctx->cert->sig->pkey_algo, "ecdsa") == 0) {
 		/* Discard the BIT STRING metadata */
 		if (vlen < 1 || *(const u8 *)value != 0)
 			return -EBADMSG;
@@ -479,6 +505,10 @@ int x509_extract_key_data(void *context, size_t hdrlen,
 		case OID_sm2:
 			ctx->cert->pub->pkey_algo = "sm2";
 			break;
+		case OID_id_prime192v1:
+		case OID_id_prime256v1:
+			ctx->cert->pub->pkey_algo = "ecdsa";
+			break;
 		default:
 			return -ENOPKG;
 		}
diff --git a/include/linux/oid_registry.h b/include/linux/oid_registry.h
index 4462ed2c18cd..e8071133d0e2 100644
--- a/include/linux/oid_registry.h
+++ b/include/linux/oid_registry.h
@@ -21,6 +21,12 @@ enum OID {
 	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_prime192v1,		/* 1.2.840.10045.3.1.1 */
+	OID_id_prime256v1,		/* 1.2.840.10045.3.1.7 */
+	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 */
-- 
2.26.2

Re: [PATCH v4 0/3] Add support for x509 certs with NIST p256 and p192 keys

[David Howells]

This (sub)set is intended to go through the keyrings tree or is it all going
through the crypto tree now?

David

Re: [PATCH v4 0/3] Add support for x509 certs with NIST p256 and p192 keys

[Stefan Berger]

On 1/28/21 4:19 AM, David Howells wrote:
> This (sub)set is intended to go through the keyrings tree or is it all going
> through the crypto tree now?


Patch 1/3 should go through 'crypto', the other ones through 'keyrings'.

    Stefan


>
> David
>

Re: [PATCH v4 0/3] Add support for x509 certs with NIST p256 and p192 keys

[David Howells]

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

> > This (sub)set is intended to go through the keyrings tree or is it all going
> > through the crypto tree now?
> 
> 
> Patch 1/3 should go through 'crypto', the other ones through 'keyrings'.

Do 2 & 3 depend on 1?

David

Re: [PATCH v4 0/3] Add support for x509 certs with NIST p256 and p192 keys

[Stefan Berger]

On 1/28/21 8:54 AM, David Howells wrote:
> Stefan Berger <stefanb@linux.ibm.com> wrote:
>
>>> This (sub)set is intended to go through the keyrings tree or is it all going
>>> through the crypto tree now?
>>
>> Patch 1/3 should go through 'crypto', the other ones through 'keyrings'.
> Do 2 & 3 depend on 1?


Functionality-wise, yes, compilation-wise, no.

    Stefan

Re: [PATCH v4 1/3] crypto: Add support for ECDSA signature verification

[Herbert Xu]

On Wed, Jan 27, 2021 at 07:14:10PM -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.
> 
> Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
> Cc: Herbert Xu <herbert@gondor.apana.org.au>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: linux-crypto@vger.kernel.org
> ---
>  crypto/Makefile            |   9 +-
>  crypto/ecc.c               | 279 +++++++++++++++++++++++++++++++++++++
>  crypto/ecc.h               |   2 +
>  crypto/ecdsasignature.asn1 |   4 +
>  4 files changed, 293 insertions(+), 1 deletion(-)
>  create mode 100644 crypto/ecdsasignature.asn1

Hi Stefan:

I forgot to cc you on the other thread at

https://lore.kernel.org/linux-crypto/20210128103908.GA32495@gondor.apana.org.au/T/#u

Whatever we decide there would be applicable to your scenario too.
Please join the discussion on that thread.

Thanks,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt