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Commit 68c45c7f authored by David Howells's avatar David Howells
Browse files

Merge tag 'keys-fixes-20140916' into keys-next 



Merge in keyrings fixes, at least some of which later patches depend on:

 (1) Reinstate the production of EPERM for key types beginning with '.' in
     requests from userspace.

 (2) Tidy up the cleanup of PKCS#7 message signed information blocks and fix a
     bug this made more obvious.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.coM>
parents ac60ab4b cecf5d2e

crypto/asymmetric_keys/pkcs7_parser.c

+33 −28
Original line number Diff line number Diff line
@@ -31,6 +31,18 @@ struct pkcs7_parse_context { 
	unsigned	sinfo_index;

};



/*

 * Free a signed information block.

 */

static void pkcs7_free_signed_info(struct pkcs7_signed_info *sinfo)

{

	if (sinfo) {

		mpi_free(sinfo->sig.mpi[0]);

		kfree(sinfo->sig.digest);

		kfree(sinfo);

	}

}



/**

 * pkcs7_free_message - Free a PKCS#7 message

 * @pkcs7: The PKCS#7 message to free
@@ -54,9 +66,7 @@ void pkcs7_free_message(struct pkcs7_message *pkcs7) 
		while (pkcs7->signed_infos) {

			sinfo = pkcs7->signed_infos;

			pkcs7->signed_infos = sinfo->next;

			mpi_free(sinfo->sig.mpi[0]);

			kfree(sinfo->sig.digest);

			kfree(sinfo);

			pkcs7_free_signed_info(sinfo);

		}

		kfree(pkcs7);

	}
@@ -71,51 +81,46 @@ EXPORT_SYMBOL_GPL(pkcs7_free_message); 
struct pkcs7_message *pkcs7_parse_message(const void *data, size_t datalen)

{

	struct pkcs7_parse_context *ctx;

	struct pkcs7_message *msg;

	long ret;

	struct pkcs7_message *msg = ERR_PTR(-ENOMEM);

	int ret;



	ret = -ENOMEM;

	msg = kzalloc(sizeof(struct pkcs7_message), GFP_KERNEL);

	if (!msg)

		goto error_no_sig;

	ctx = kzalloc(sizeof(struct pkcs7_parse_context), GFP_KERNEL);

	if (!ctx)

		goto error_no_ctx;

		goto out_no_ctx;

	ctx->msg = kzalloc(sizeof(struct pkcs7_message), GFP_KERNEL);

	if (!ctx->msg)

		goto out_no_msg;

	ctx->sinfo = kzalloc(sizeof(struct pkcs7_signed_info), GFP_KERNEL);

	if (!ctx->sinfo)

		goto error_no_sinfo;

		goto out_no_sinfo;



	ctx->msg = msg;

	ctx->data = (unsigned long)data;

	ctx->ppcerts = &ctx->certs;

	ctx->ppsinfo = &ctx->msg->signed_infos;



	/* Attempt to decode the signature */

	ret = asn1_ber_decoder(&pkcs7_decoder, ctx, data, datalen);

	if (ret < 0)

		goto error_decode;

	if (ret < 0) {

		msg = ERR_PTR(ret);

		goto out;

	}



	msg = ctx->msg;

	ctx->msg = NULL;



out:

	while (ctx->certs) {

		struct x509_certificate *cert = ctx->certs;

		ctx->certs = cert->next;

		x509_free_certificate(cert);

	}

	mpi_free(ctx->sinfo->sig.mpi[0]);

	kfree(ctx->sinfo->sig.digest);

	kfree(ctx->sinfo);

	pkcs7_free_signed_info(ctx->sinfo);

out_no_sinfo:

	pkcs7_free_message(ctx->msg);

out_no_msg:

	kfree(ctx);

out_no_ctx:

	return msg;



error_decode:

	mpi_free(ctx->sinfo->sig.mpi[0]);

	kfree(ctx->sinfo->sig.digest);

	kfree(ctx->sinfo);

error_no_sinfo:

	kfree(ctx);

error_no_ctx:

	pkcs7_free_message(msg);

error_no_sig:

	return ERR_PTR(ret);

}

EXPORT_SYMBOL_GPL(pkcs7_parse_message);

security/keys/keyctl.c

+2 −0
Original line number Diff line number Diff line
@@ -37,6 +37,8 @@ static int key_get_type_from_user(char *type, 
		return ret;

	if (ret == 0 || ret >= len)

		return -EINVAL;

	if (type[0] == '.')

		return -EPERM;

	type[len - 1] = '\0';

	return 0;

}