From patchwork Wed May 15 13:39:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 13665283 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 C3AD912A15B; Wed, 15 May 2024 13:39:40 +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=1715780381; cv=none; b=HzreStY+F8yJpmmSThKQMES/oEJmjPxxwPrKR879Tql8LMThE/uIeKD6HmmEvhsjfdGDQsjT8W6SKm3yCJHDiXw0pXG5ErcslFVXtgLqdZrkHhoXDHUAvRI6RZ89d9StP0ufCWjDQODii8JYfjk/6cTk6DVrenZHrlKva2TFygM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715780381; c=relaxed/simple; bh=17blqijHRfRC3vxH1neCWLqBA7J+OA+Hm9veCyE5STQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=NsCU/DAAx4Yh8UbR3sIcosENXNHNuPDmQhlvT2i5GTmSQH2TCGsLBJpIIuqUmxHJDf4rg5b0aPDXozPugSrH3o6ugNv9mbNWYnmZVEAeQ1ATJ8y/jJV+Kcn+DpsRMzNxBqEqm3EmQRqPOTmFwhGwvgHGb17HebNiOtqCEt5Yr2k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ki78AE9X; 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="ki78AE9X" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCE25C4AF0B; Wed, 15 May 2024 13:39:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715780380; bh=17blqijHRfRC3vxH1neCWLqBA7J+OA+Hm9veCyE5STQ=; h=From:To:Cc:Subject:Date:From; b=ki78AE9XAAMtOh9Nkf1Pp5y5zmVJeprzd3VNs1f6hSE/n8u4cB+4gEoR7PE1nl2AM 9onlpQqFBmKAriQRHBmlWjeJdKqyf0goRUzjVYlKzWLOvLO0J8+FGv9i6tvBVo0zv0 1DhUWs2DEzmg5tCHHaWIW+p6ZsPvUaJg/5u+W91I713iJC6xpae+fefdGlUQsWsDAi 4MOctzzNTiL3jEOU8z/QwRntx2rxh4LD2ARV6ZtPWsTXASoQeGD6uRoG2APerAybsk QBt3JgO9t458/FbhgNXMG0Z56pwzb1UUzBdE/3CdBbuebhVJ30L5HSbFjIXmLJ/wBF tQp4tQF2U/tCw== From: Jarkko Sakkinen To: Herbert Xu Cc: linux-integrity@vger.kernel.org, Jarkko Sakkinen , James Prestwood , "David S. Miller" , linux-crypto@vger.kernel.org (open list:CRYPTO API), linux-kernel@vger.kernel.org (open list) Subject: [PATCH] crypto: rsa-pkcs1pad: export rsa1_asn_lookup() Date: Wed, 15 May 2024 16:39:30 +0300 Message-ID: <20240515133933.8515-1-jarkko@kernel.org> X-Mailer: git-send-email 2.45.0 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. Later rsa_lookup_asn1() can be enabled in crypto/asymmetric_keys/Kconfig by: depends on CRYPTO_RSA >= Cc: James Prestwood Signed-off-by: Jarkko Sakkinen --- crypto/rsa-pkcs1pad.c | 10 +++++++++- include/crypto/rsa-pkcs1pad.h | 11 +++++++++++ 2 files changed, 20 insertions(+), 1 deletion(-) create mode 100644 include/crypto/rsa-pkcs1pad.h diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c index cd501195f34a..a07ccf179f56 100644 --- a/crypto/rsa-pkcs1pad.c +++ b/crypto/rsa-pkcs1pad.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -101,7 +102,13 @@ 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 theu 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 +117,7 @@ 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..9881fa23d0dd --- /dev/null +++ b/include/crypto/rsa-pkcs1pad.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * RSA padding templates. + */ + +#ifndef _CRYPTO_RSA_PKCS1PAD_H +#define _CRYPTO_RSA_PKCS1PAD_H + +const struct rsa_asn1_template *rsa_lookup_asn1(const char *name); + +#endif /* _CRYPTO_RSA_PKCS1PAD_H */