add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/crypto/asymmetric_keys/x509_cert_parser.c
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@@ -1,12 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /* X.509 certificate parser
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  *
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  * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
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  * Written by David Howells (dhowells@redhat.com)
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public Licence
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- * as published by the Free Software Foundation; either version
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- * 2 of the Licence, or (at your option) any later version.
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  */
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 #define pr_fmt(fmt) "X.509: "fmt
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@@ -26,6 +22,9 @@
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 	const void	*cert_start;		/* Start of cert content */
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 	const void	*key;			/* Key data */
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 	size_t		key_size;		/* Size of key data */
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+	const void	*params;		/* Key parameters */
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+	size_t		params_size;		/* Size of key parameters */
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+	enum OID	key_algo;		/* Public key algorithm */
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 	enum OID	last_oid;		/* Last OID encountered */
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 	enum OID	algo_oid;		/* Algorithm OID */
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 	unsigned char	nr_mpi;			/* Number of MPIs stored */
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@@ -108,6 +107,13 @@
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 		goto error_decode;
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 	cert->pub->keylen = ctx->key_size;
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+
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+	cert->pub->params = kmemdup(ctx->params, ctx->params_size, GFP_KERNEL);
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+	if (!cert->pub->params)
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+		goto error_decode;
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+
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+	cert->pub->paramlen = ctx->params_size;
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+	cert->pub->algo = ctx->key_algo;
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 	/* Grab the signature bits */
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 	ret = x509_get_sig_params(cert);
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@@ -199,35 +205,54 @@
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 	case OID_md4WithRSAEncryption:
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 		ctx->cert->sig->hash_algo = "md4";
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-		ctx->cert->sig->pkey_algo = "rsa";
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-		break;
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+		goto rsa_pkcs1;
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 	case OID_sha1WithRSAEncryption:
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 		ctx->cert->sig->hash_algo = "sha1";
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-		ctx->cert->sig->pkey_algo = "rsa";
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-		break;
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+		goto rsa_pkcs1;
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 	case OID_sha256WithRSAEncryption:
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 		ctx->cert->sig->hash_algo = "sha256";
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-		ctx->cert->sig->pkey_algo = "rsa";
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-		break;
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+		goto rsa_pkcs1;
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 	case OID_sha384WithRSAEncryption:
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 		ctx->cert->sig->hash_algo = "sha384";
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-		ctx->cert->sig->pkey_algo = "rsa";
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-		break;
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+		goto rsa_pkcs1;
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 	case OID_sha512WithRSAEncryption:
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 		ctx->cert->sig->hash_algo = "sha512";
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-		ctx->cert->sig->pkey_algo = "rsa";
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-		break;
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+		goto rsa_pkcs1;
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 	case OID_sha224WithRSAEncryption:
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 		ctx->cert->sig->hash_algo = "sha224";
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-		ctx->cert->sig->pkey_algo = "rsa";
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-		break;
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+		goto rsa_pkcs1;
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+
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+	case OID_gost2012Signature256:
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+		ctx->cert->sig->hash_algo = "streebog256";
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+		goto ecrdsa;
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+
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+	case OID_gost2012Signature512:
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+		ctx->cert->sig->hash_algo = "streebog512";
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+		goto ecrdsa;
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+
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+	case OID_SM2_with_SM3:
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+		ctx->cert->sig->hash_algo = "sm3";
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+		goto sm2;
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 	}
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+rsa_pkcs1:
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+	ctx->cert->sig->pkey_algo = "rsa";
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+	ctx->cert->sig->encoding = "pkcs1";
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+	ctx->algo_oid = ctx->last_oid;
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+	return 0;
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+ecrdsa:
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+	ctx->cert->sig->pkey_algo = "ecrdsa";
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+	ctx->cert->sig->encoding = "raw";
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+	ctx->algo_oid = ctx->last_oid;
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+	return 0;
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+sm2:
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+	ctx->cert->sig->pkey_algo = "sm2";
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+	ctx->cert->sig->encoding = "raw";
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 	ctx->algo_oid = ctx->last_oid;
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 	return 0;
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 }
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@@ -249,7 +274,9 @@
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 		return -EINVAL;
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 	}
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-	if (strcmp(ctx->cert->sig->pkey_algo, "rsa") == 0) {
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+	if (strcmp(ctx->cert->sig->pkey_algo, "rsa") == 0 ||
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+	    strcmp(ctx->cert->sig->pkey_algo, "ecrdsa") == 0 ||
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+	    strcmp(ctx->cert->sig->pkey_algo, "sm2") == 0) {
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 		/* Discard the BIT STRING metadata */
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 		if (vlen < 1 || *(const u8 *)value != 0)
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 			return -EBADMSG;
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@@ -404,6 +431,27 @@
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 }
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 /*
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+ * Extract the parameters for the public key
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+ */
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+int x509_note_params(void *context, size_t hdrlen,
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+		     unsigned char tag,
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+		     const void *value, size_t vlen)
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+{
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+	struct x509_parse_context *ctx = context;
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+
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+	/*
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+	 * AlgorithmIdentifier is used three times in the x509, we should skip
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+	 * first and ignore third, using second one which is after subject and
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+	 * before subjectPublicKey.
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+	 */
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+	if (!ctx->cert->raw_subject || ctx->key)
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+		return 0;
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+	ctx->params = value - hdrlen;
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+	ctx->params_size = vlen + hdrlen;
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+	return 0;
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+}
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+
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+/*
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  * Extract the data for the public key algorithm
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  */
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 int x509_extract_key_data(void *context, size_t hdrlen,
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@@ -412,10 +460,21 @@
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 {
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 	struct x509_parse_context *ctx = context;
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-	if (ctx->last_oid != OID_rsaEncryption)
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+	ctx->key_algo = ctx->last_oid;
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+	switch (ctx->last_oid) {
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+	case OID_rsaEncryption:
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+		ctx->cert->pub->pkey_algo = "rsa";
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+		break;
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+	case OID_gost2012PKey256:
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+	case OID_gost2012PKey512:
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+		ctx->cert->pub->pkey_algo = "ecrdsa";
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+		break;
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+	case OID_id_ecPublicKey:
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+		ctx->cert->pub->pkey_algo = "sm2";
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+		break;
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+	default:
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 		return -ENOPKG;
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-
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-	ctx->cert->pub->pkey_algo = "rsa";
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+	}
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 	/* Discard the BIT STRING metadata */
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 	if (vlen < 1 || *(const u8 *)value != 0)