From patchwork Sat May 18 21:36:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 797720 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 2077F6BB26; Sat, 18 May 2024 21:37:12 +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=1716068233; cv=none; b=nkJapSPyy4DD70cS1jT7wK2acUYYoGLBjSFbgX6o3dCzeJm3v8BZ5fVcG5z6Ox+STbjE5ss3pkRKwYiWTtsfJ+lNX6DqT0s+2t3HKjmCxPwRBtDgGHgT2IU+p6uUR+TX/IUpIeZHJgxjpzCJ6uYsU1T9zI67Ox7e/l771jRAhow= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716068233; c=relaxed/simple; bh=rQTPLrmfpCPpQ7Zz53PlLkcw1m7mUahOVVqZUGpxmKU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HSlK9VA1/ZxT5Q+CgGxrpsmpcU9wxgaEXJlz5b7iVfrBdtbIj9r08Sj8JgemKSf0Kz73hPxSOHuHMrtgQ1XEOMOFB3CuNmqVq9MxR2bCSEydlinuPsiUw/FLh6+7ENqpvZMpn5d+8TZbiUNs55abM84Q+VtPshu2H82SKcTWxsg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XSYiLLKI; 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="XSYiLLKI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4737BC113CC; Sat, 18 May 2024 21:37:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716068232; bh=rQTPLrmfpCPpQ7Zz53PlLkcw1m7mUahOVVqZUGpxmKU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XSYiLLKIHu7Nrg0S8+XZkRLFKSjClMj5gKU88AhUwhdr1TVBY0wxmSW1Nu5q5yLeI uUgnFyLL6KKLz7ZRA4gFXM7YN9B8xfR3ZhsD8AGL6a98VLe/eW2mie1P3AE7giDotb WwAOMaXOgjUZAlQHjy0w10VwnQN9V1mJId53W/bd/Fwge7xO6DYUvCJHnAWb2rbMRt 7ymY7IoeVJXm/NJZA5+aXa0dnD5I8BFGWsVkAv7cBrxoj0SBfdlvgVZoUbiegG9ja2 5Qyp5l5f2WMpCaV+I3IIc7CBLhxquIT9Ijf8WVlu5qlmDZ+PLx4S3BFnBqZtgSFrtt f/TWXvOUXX1Dg== From: Jarkko Sakkinen To: Herbert Xu Cc: linux-integrity@vger.kernel.org, keyrings@vger.kernel.org, Andreas.Fuchs@infineon.com, James Prestwood , David Woodhouse , Jarkko Sakkinen , David Howells , "David S. Miller" , Peter Huewe , Jason Gunthorpe , James Bottomley , Stefan Berger , Ard Biesheuvel , Mario Limonciello , linux-crypto@vger.kernel.org (open list:CRYPTO API), linux-kernel@vger.kernel.org (open list) Subject: [PATCH RFC 1/5] crypto: rsa-pkcs1pad: export rsa1_asn_lookup() Date: Sun, 19 May 2024 00:36:21 +0300 Message-ID: <20240518213700.5960-2-jarkko@kernel.org> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240518213700.5960-1-jarkko@kernel.org> References: <20240518213700.5960-1-jarkko@kernel.org> Precedence: bulk X-Mailing-List: linux-crypto@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 */