Merge branch 'ecc'

This pulls in the NIST P384/256/192 x509 changes.

crypto/Kconfig

@@ -242,6 +242,16 @@ 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

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

crypto/asymmetric_keys/public_key.c

@@ -14,6 +14,7 @@
 #include <linux/slab.h>
 #include <linux/seq_file.h>
 #include <linux/scatterlist.h>
+#include <linux/asn1.h>
 #include <keys/asymmetric-subtype.h>
 #include <crypto/public_key.h>
 #include <crypto/akcipher.h>
@@ -85,7 +86,8 @@ int software_key_determine_akcipher(const char *encoding,
 		return n >= CRYPTO_MAX_ALG_NAME ? -EINVAL : 0;
 	}
 
-	if (strcmp(encoding, "raw") == 0) {
+	if (strcmp(encoding, "raw") == 0 ||
+	    strcmp(encoding, "x962") == 0) {
 		strcpy(alg_name, pkey->pkey_algo);
 		return 0;
 	}

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;
@@ -459,6 +485,7 @@ 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) {
@@ -470,8 +497,26 @@ int x509_extract_key_data(void *context, size_t hdrlen,
 		ctx->cert->pub->pkey_algo = "ecrdsa";
 		break;
 	case OID_id_ecPublicKey:
+		if (parse_OID(ctx->params, ctx->params_size, &oid) != 0)
+			return -EBADMSG;
+
+		switch (oid) {
+		case OID_sm2:
 			ctx->cert->pub->pkey_algo = "sm2";
 			break;
+		case OID_id_prime192v1:
+			ctx->cert->pub->pkey_algo = "ecdsa-nist-p192";
+			break;
+		case OID_id_prime256v1:
+			ctx->cert->pub->pkey_algo = "ecdsa-nist-p256";
+			break;
+		case OID_id_ansip384r1:
+			ctx->cert->pub->pkey_algo = "ecdsa-nist-p384";
+			break;
+		default:
+			return -ENOPKG;
+		}
+		break;
 	default:
 		return -ENOPKG;
 	}

crypto/asymmetric_keys/x509_public_key.c

@@ -129,7 +129,9 @@ int x509_check_for_self_signed(struct x509_certificate *cert)
 	}
 
 	ret = -EKEYREJECTED;
-	if (strcmp(cert->pub->pkey_algo, cert->sig->pkey_algo) != 0)
+	if (strcmp(cert->pub->pkey_algo, cert->sig->pkey_algo) != 0 &&
+	    (strncmp(cert->pub->pkey_algo, "ecdsa-", 6) != 0 ||
+	     strcmp(cert->sig->pkey_algo, "ecdsa") != 0))
 		goto out;
 
 	ret = public_key_verify_signature(cert->pub, cert->sig);

crypto/ecc.h

@@ -31,12 +31,38 @@
 /* One digit is u64 qword. */
 #define ECC_CURVE_NIST_P192_DIGITS  3
 #define ECC_CURVE_NIST_P256_DIGITS  4
-#define ECC_MAX_DIGITS             (512 / 64)
+#define ECC_CURVE_NIST_P384_DIGITS  6
+#define ECC_MAX_DIGITS              (512 / 64) /* due to ecrdsa */
 
 #define ECC_DIGITS_TO_BYTES_SHIFT 3
 
+#define ECC_MAX_BYTES (ECC_MAX_DIGITS << ECC_DIGITS_TO_BYTES_SHIFT)
+
 #define ECC_POINT_INIT(x, y, ndigits)	(struct ecc_point) { x, y, ndigits }
 
+/**
+ * ecc_swap_digits() - Copy ndigits from big endian array to native array
+ * @in:       Input array
+ * @out:      Output array
+ * @ndigits:  Number of digits to copy
+ */
+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]);
+}
+
+/**
+ * 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
  *

crypto/ecc_curve_defs.h

@@ -54,6 +54,38 @@ static struct ecc_curve nist_p256 = {
 	.b = nist_p256_b
 };
 
+/* NIST P-384 */
+static u64 nist_p384_g_x[] = { 0x3A545E3872760AB7ull, 0x5502F25DBF55296Cull,
+				0x59F741E082542A38ull, 0x6E1D3B628BA79B98ull,
+				0x8Eb1C71EF320AD74ull, 0xAA87CA22BE8B0537ull };
+static u64 nist_p384_g_y[] = { 0x7A431D7C90EA0E5Full, 0x0A60B1CE1D7E819Dull,
+				0xE9DA3113B5F0B8C0ull, 0xF8F41DBD289A147Cull,
+				0x5D9E98BF9292DC29ull, 0x3617DE4A96262C6Full };
+static u64 nist_p384_p[] = { 0x00000000FFFFFFFFull, 0xFFFFFFFF00000000ull,
+				0xFFFFFFFFFFFFFFFEull, 0xFFFFFFFFFFFFFFFFull,
+				0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFFFFFFFFFFull };
+static u64 nist_p384_n[] = { 0xECEC196ACCC52973ull, 0x581A0DB248B0A77Aull,
+				0xC7634D81F4372DDFull, 0xFFFFFFFFFFFFFFFFull,
+				0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFFFFFFFFFFull };
+static u64 nist_p384_a[] = { 0x00000000FFFFFFFCull, 0xFFFFFFFF00000000ull,
+				0xFFFFFFFFFFFFFFFEull, 0xFFFFFFFFFFFFFFFFull,
+				0xFFFFFFFFFFFFFFFFull, 0xFFFFFFFFFFFFFFFFull };
+static u64 nist_p384_b[] = { 0x2a85c8edd3ec2aefull, 0xc656398d8a2ed19dull,
+				0x0314088f5013875aull, 0x181d9c6efe814112ull,
+				0x988e056be3f82d19ull, 0xb3312fa7e23ee7e4ull };
+static struct ecc_curve nist_p384 = {
+	.name = "nist_384",
+	.g = {
+		.x = nist_p384_g_x,
+		.y = nist_p384_g_y,
+		.ndigits = 6,
+	},
+	.p = nist_p384_p,
+	.n = nist_p384_n,
+	.a = nist_p384_a,
+	.b = nist_p384_b
+};
+
 /* curve25519 */
 static u64 curve25519_g_x[] = { 0x0000000000000009, 0x0000000000000000,
 				0x0000000000000000, 0x0000000000000000 };

crypto/ecdsa.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2021 IBM Corporation
+ */
+
+#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 p384, 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_p384_init_tfm(struct crypto_akcipher *tfm)
+{
+	struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm);
+
+	return ecdsa_ecc_ctx_init(ctx, ECC_CURVE_NIST_P384);
+}
+
+static struct akcipher_alg ecdsa_nist_p384 = {
+	.verify = ecdsa_verify,
+	.set_pub_key = ecdsa_set_pub_key,
+	.max_size = ecdsa_max_size,
+	.init = ecdsa_nist_p384_init_tfm,
+	.exit = ecdsa_exit_tfm,
+	.base = {
+		.cra_name = "ecdsa-nist-p384",
+		.cra_driver_name = "ecdsa-nist-p384-generic",
+		.cra_priority = 100,
+		.cra_module = THIS_MODULE,
+		.cra_ctxsize = sizeof(struct ecc_ctx),
+	},
+};
+
+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;
+
+	ret = crypto_register_akcipher(&ecdsa_nist_p384);
+	if (ret)
+		goto nist_p384_error;
+
+	return 0;
+
+nist_p384_error:
+	crypto_unregister_akcipher(&ecdsa_nist_p256);
+
+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);
+	crypto_unregister_akcipher(&ecdsa_nist_p384);
+}
+
+subsys_initcall(ecdsa_init);
+module_exit(ecdsa_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Stefan Berger <stefanb@linux.ibm.com>");
+MODULE_DESCRIPTION("ECDSA generic algorithm");
+MODULE_ALIAS_CRYPTO("ecdsa-generic");

crypto/ecdsasignature.asn1

+ECDSASignature ::= SEQUENCE {
+	r	INTEGER ({ ecdsa_get_signature_r }),
+	s	INTEGER ({ ecdsa_get_signature_s })
+}

crypto/testmgr.c

@@ -4914,6 +4914,24 @@ static const struct alg_test_desc alg_test_descs[] = {
 		.suite = {
 			.kpp = __VECS(ecdh_p256_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 = "ecdsa-nist-p384",
+		.test = alg_test_akcipher,
+		.suite = {
+			.akcipher = __VECS(ecdsa_nist_p384_tv_template)
+		}
 	}, {
 		.alg = "ecrdsa",
 		.test = alg_test_akcipher,

include/crypto/ecdh.h

@@ -25,6 +25,7 @@
 /* Curves IDs */
 #define ECC_CURVE_NIST_P192	0x0001
 #define ECC_CURVE_NIST_P256	0x0002
+#define ECC_CURVE_NIST_P384	0x0003
 
 /**
  * struct ecdh - define an ECDH private key

include/keys/asymmetric-type.h

@@ -72,6 +72,12 @@ const struct asymmetric_key_ids *asymmetric_key_ids(const struct key *key)
 	return key->payload.data[asym_key_ids];
 }
 
+static inline
+const struct public_key *asymmetric_key_public_key(const struct key *key)
+{
+	return key->payload.data[asym_crypto];
+}
+
 extern struct key *find_asymmetric_key(struct key *keyring,
 				       const struct asymmetric_key_id *id_0,
 				       const struct asymmetric_key_id *id_1,

include/linux/oid_registry.h

@@ -19,8 +19,14 @@
 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_prime192v1,		/* 1.2.840.10045.3.1.1 */
+	OID_id_prime256v1,		/* 1.2.840.10045.3.1.7 */
+	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 */
@@ -58,6 +64,7 @@ enum OID {
 
 	OID_certAuthInfoAccess,		/* 1.3.6.1.5.5.7.1.1 */
 	OID_sha1,			/* 1.3.14.3.2.26 */
+	OID_id_ansip384r1,		/* 1.3.132.0.34 */
 	OID_sha256,			/* 2.16.840.1.101.3.4.2.1 */
 	OID_sha384,			/* 2.16.840.1.101.3.4.2.2 */
 	OID_sha512,			/* 2.16.840.1.101.3.4.2.3 */
@@ -117,6 +124,7 @@ enum OID {
 };
 
 extern enum OID look_up_OID(const void *data, size_t datasize);
+extern int parse_OID(const void *data, size_t datasize, enum OID *oid);
 extern int sprint_oid(const void *, size_t, char *, size_t);
 extern int sprint_OID(enum OID, char *, size_t);
 

lib/oid_registry.c

@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/bug.h>
+#include <linux/asn1.h>
 #include "oid_registry_data.c"
 
 MODULE_DESCRIPTION("OID Registry");
@@ -92,6 +93,29 @@ enum OID look_up_OID(const void *data, size_t datasize)
 }
 EXPORT_SYMBOL_GPL(look_up_OID);
 
+/**
+ * parse_OID - Parse an OID from a bytestream
+ * @data: Binary representation of the header + OID
+ * @datasize: Size of the binary representation
+ * @oid: Pointer to oid to return result
+ *
+ * Parse an OID from a bytestream that holds the OID in the format
+ * ASN1_OID | length | oid. The length indicator must equal to datasize - 2.
+ * -EBADMSG is returned if the bytestream is too short.
+ */
+int parse_OID(const void *data, size_t datasize, enum OID *oid)
+{
+	const unsigned char *v = data;
+
+	/* we need 2 bytes of header and at least 1 byte for oid */
+	if (datasize < 3 || v[0] != ASN1_OID || v[1] != datasize - 2)
+		return -EBADMSG;
+
+	*oid = look_up_OID(data + 2, datasize - 2);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(parse_OID);
+
 /*
  * sprint_OID - Print an Object Identifier into a buffer
  * @data: The encoded OID to print

security/integrity/digsig_asymmetric.c

@@ -84,6 +84,7 @@ int asymmetric_verify(struct key *keyring, const char *sig,
 {
 	struct public_key_signature pks;
 	struct signature_v2_hdr *hdr = (struct signature_v2_hdr *)sig;
+	const struct public_key *pk;
 	struct key *key;
 	int ret;
 
@@ -105,23 +106,20 @@ int asymmetric_verify(struct key *keyring, const char *sig,
 	memset(&pks, 0, sizeof(pks));
 
 	pks.hash_algo = hash_algo_name[hdr->hash_algo];
-	switch (hdr->hash_algo) {
-	case HASH_ALGO_STREEBOG_256:
-	case HASH_ALGO_STREEBOG_512:
-		/* EC-RDSA and Streebog should go together. */
-		pks.pkey_algo = "ecrdsa";
-		pks.encoding = "raw";
-		break;
-	case HASH_ALGO_SM3_256:
-		/* SM2 and SM3 should go together. */
-		pks.pkey_algo = "sm2";
-		pks.encoding = "raw";
-		break;
-	default:
-		pks.pkey_algo = "rsa";
+
+	pk = asymmetric_key_public_key(key);
+	pks.pkey_algo = pk->pkey_algo;
+	if (!strcmp(pk->pkey_algo, "rsa"))
 		pks.encoding = "pkcs1";
-		break;
-	}
+	else if (!strncmp(pk->pkey_algo, "ecdsa-", 6))
+		/* edcsa-nist-p192 etc. */
+		pks.encoding = "x962";
+	else if (!strcmp(pk->pkey_algo, "ecrdsa") ||
+		   !strcmp(pk->pkey_algo, "sm2"))
+		pks.encoding = "raw";
+	else
+		return -ENOPKG;
+
 	pks.digest = (u8 *)data;
 	pks.digest_size = datalen;
 	pks.s = hdr->sig;