From patchwork Wed May 22 00:52:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 13669857 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E017E568A; Wed, 22 May 2024 00:53:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716339187; cv=none; b=D0RrOt+ad8jDWKu1nomeeJ0tT7MxF9VgTKofykjcTBByGeGbM+OJ1ilOYC9QYJYnje2uLi/hod9tJkb4mGIu8+txwD2vB2besIFtJTM4ixHIA1u0V2qzPP0lWmQM/GDrs8eYE03uACnxbcvlXV1vAhbGKPhe0vPsNna5MHSJ7tI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716339187; c=relaxed/simple; bh=rQTPLrmfpCPpQ7Zz53PlLkcw1m7mUahOVVqZUGpxmKU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=B9zpbc95CuyEHQBqH1lXOHciTfbzZnDusRI+mY6QXCh8imw3IFf/itzRvFvb3s/dDoW+EWFuqWCA+hvqpvDDseHqToR6tiOquBhBdsTBtQMFEeI/iYbyU6wVvczYBfshJN82zGuNj7FH9ghDytlJD7iQtfyVC4CxnUQBpPr5A8o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fjjT/6ah; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="fjjT/6ah" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1B8E0C32786; Wed, 22 May 2024 00:53:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716339186; bh=rQTPLrmfpCPpQ7Zz53PlLkcw1m7mUahOVVqZUGpxmKU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fjjT/6ahpTP6a+Bs8wKUPMZRh4rOFZoK7T2tHX/Rfe16aMb7kTHzRg4fSW7u1RX8t AjLeDgLuB8djDKF0i4zTtoSsbQdiz/NbsZlVU+kbdSZdJBJXCsNljVg/VVQgtmePaO H6yuAWrKQmvbjj3BVx3YQH+sdXydeiA9wpxV5de8cwwBmVATsnoiBcneVd7gNrGNaQ CmZp8pKGk1AQSZ8a0Z65eQSzL7AT3+xyIgf2g8t/vlY0ZzYW8likNa0Tp/DF0Zg8Kr /5MjXvuVIeWUBsUTKMp3GoBeVVx9R4wrbyIoJLd2NP7Ew0amfDCJYs/ypuiVrMQQRF yCh1AySogOxOQ== From: Jarkko Sakkinen To: Herbert Xu Cc: linux-integrity@vger.kernel.org, keyrings@vger.kernel.org, Andreas.Fuchs@infineon.com, James Prestwood , David Woodhouse , Eric Biggers , James Bottomley , Jarkko Sakkinen , "David S. Miller" , linux-crypto@vger.kernel.org (open list:CRYPTO API), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v4 1/5] crypto: rsa-pkcs1pad: export rsa1_asn_lookup() Date: Wed, 22 May 2024 03:52:39 +0300 Message-ID: <20240522005252.17841-2-jarkko@kernel.org> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240522005252.17841-1-jarkko@kernel.org> References: <20240522005252.17841-1-jarkko@kernel.org> Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 ASN.1 template is required for TPM2 asymmetric keys, as it needs to be piggy-packed with the input data before applying TPM2_RSA_Decrypt. This patch prepares crypto subsystem for the addition of those keys. Signed-off-by: Jarkko Sakkinen --- crypto/rsa-pkcs1pad.c | 16 ++++++++++------ include/crypto/rsa-pkcs1pad.h | 20 ++++++++++++++++++++ 2 files changed, 30 insertions(+), 6 deletions(-) create mode 100644 include/crypto/rsa-pkcs1pad.h diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c index cd501195f34a..00b6c14f861c 100644 --- a/crypto/rsa-pkcs1pad.c +++ b/crypto/rsa-pkcs1pad.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -79,11 +80,7 @@ static const u8 rsa_digest_info_sha3_512[] = { 0x05, 0x00, 0x04, 0x40 }; -static const struct rsa_asn1_template { - const char *name; - const u8 *data; - size_t size; -} rsa_asn1_templates[] = { +static const struct rsa_asn1_template rsa_asn1_templates[] = { #define _(X) { #X, rsa_digest_info_##X, sizeof(rsa_digest_info_##X) } _(md5), _(sha1), @@ -101,7 +98,13 @@ static const struct rsa_asn1_template { { NULL } }; -static const struct rsa_asn1_template *rsa_lookup_asn1(const char *name) +/** + * rsa_lookup_asn1() - Lookup the ASN.1 digest info given the hash + * name: hash algorithm name + * + * Returns the ASN.1 digest info on success, and NULL on failure. + */ +const struct rsa_asn1_template *rsa_lookup_asn1(const char *name) { const struct rsa_asn1_template *p; @@ -110,6 +113,7 @@ static const struct rsa_asn1_template *rsa_lookup_asn1(const char *name) return p; return NULL; } +EXPORT_SYMBOL_GPL(rsa_lookup_asn1); struct pkcs1pad_ctx { struct crypto_akcipher *child; diff --git a/include/crypto/rsa-pkcs1pad.h b/include/crypto/rsa-pkcs1pad.h new file mode 100644 index 000000000000..32c7453ff644 --- /dev/null +++ b/include/crypto/rsa-pkcs1pad.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * RSA padding templates. + */ + +#ifndef _CRYPTO_RSA_PKCS1PAD_H +#define _CRYPTO_RSA_PKCS1PAD_H + +/* + * Hash algorithm name to ASN.1 template mapping. + */ +struct rsa_asn1_template { + const char *name; + const u8 *data; + size_t size; +}; + +const struct rsa_asn1_template *rsa_lookup_asn1(const char *name); + +#endif /* _CRYPTO_RSA_PKCS1PAD_H */