From: Jarkko Sakkinen <jarkko@kernel.org>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: linux-integrity@vger.kernel.org,
Jarkko Sakkinen <jarkko@kernel.org>,
James Prestwood <prestwoj@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
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 [thread overview]
Message-ID: <20240515133933.8515-1-jarkko@kernel.org> (raw)
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 >= <TPM2 asymmetric keys>
Cc: James Prestwood <prestwoj@gmail.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
---
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 <crypto/algapi.h>
#include <crypto/akcipher.h>
+#include <crypto/rsa-pkcs1pad.h>
#include <crypto/internal/akcipher.h>
#include <crypto/internal/rsa.h>
#include <linux/err.h>
@@ -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 */
--
2.45.0
reply other threads:[~2024-05-15 13:39 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240515133933.8515-1-jarkko@kernel.org \
--to=jarkko@kernel.org \
--cc=davem@davemloft.net \
--cc=herbert@gondor.apana.org.au \
--cc=linux-crypto@vger.kernel.org \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=prestwoj@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).