[PATCH v3 06/18] crypto: rsa: Start moving RSA common code to rsa-common

Varad Gautam
2021-04-20T11:46:32Z

Move out helpers from rsa-pkcs1pad.c which will be shared across
rsa-*pad implementations.

Signed-off-by: Varad Gautam <varad.gautam@suse.com>
---
crypto/Makefile | 1 +
crypto/rsa-common.c | 76 ++++++++++++++++++++++
crypto/rsa-pkcs1pad.c | 97 +---------------------------
include/crypto/internal/rsa-common.h | 37 +++++++++++
4 files changed, 115 insertions(+), 96 deletions(-)
create mode 100644 crypto/rsa-common.c
create mode 100644 include/crypto/internal/rsa-common.h

diff --git a/crypto/Makefile b/crypto/Makefile
index cf23affb16780..57a85b2b3429b 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -39,6 +39,7 @@ rsa_generic-y := rsapubkey.asn1.o
rsa_generic-y += rsaprivkey.asn1.o
rsa_generic-y += rsa.o
rsa_generic-y += rsa_helper.o
+rsa_generic-y += rsa-common.o
rsa_generic-y += rsa-pkcs1pad.o
obj-$(CONFIG_CRYPTO_RSA) += rsa_generic.o

diff --git a/crypto/rsa-common.c b/crypto/rsa-common.c
new file mode 100644
index 0000000000000..60073c56e3748
--- /dev/null
+++ b/crypto/rsa-common.c
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2015 Intel Corporation
+ * Copyright (C) 2021 SUSE
+ *
+ */
+
+#include <crypto/internal/rsa-common.h>
+
+/*
+ * Hash algorithm OIDs plus ASN.1 DER wrappings [RFC4880 sec 5.2.2].
+ */
+static const u8 rsa_digest_info_md5[] = {
+ 0x30, 0x20, 0x30, 0x0c, 0x06, 0x08,
+ 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05, /* OID */
+ 0x05, 0x00, 0x04, 0x10
+};
+
+static const u8 rsa_digest_info_sha1[] = {
+ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05,
+ 0x2b, 0x0e, 0x03, 0x02, 0x1a,
+ 0x05, 0x00, 0x04, 0x14
+};
+
+static const u8 rsa_digest_info_rmd160[] = {
+ 0x30, 0x21, 0x30, 0x09, 0x06, 0x05,
+ 0x2b, 0x24, 0x03, 0x02, 0x01,
+ 0x05, 0x00, 0x04, 0x14
+};
+
+static const u8 rsa_digest_info_sha224[] = {
+ 0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09,
+ 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04,
+ 0x05, 0x00, 0x04, 0x1c
+};
+
+static const u8 rsa_digest_info_sha256[] = {
+ 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09,
+ 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01,
+ 0x05, 0x00, 0x04, 0x20
+};
+
+static const u8 rsa_digest_info_sha384[] = {
+ 0x30, 0x41, 0x30, 0x0d, 0x06, 0x09,
+ 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02,
+ 0x05, 0x00, 0x04, 0x30
+};
+
+static const u8 rsa_digest_info_sha512[] = {
+ 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09,
+ 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03,
+ 0x05, 0x00, 0x04, 0x40
+};
+
+static const struct rsa_asn1_template rsa_asn1_templates[] = {
+#define _(X) { #X, rsa_digest_info_##X, sizeof(rsa_digest_info_##X) }
+ _(md5),
+ _(sha1),
+ _(rmd160),
+ _(sha256),
+ _(sha384),
+ _(sha512),
+ _(sha224),
+ { NULL }
+#undef _
+};
+
+const struct rsa_asn1_template *rsa_lookup_asn1(const char *name)
+{
+ const struct rsa_asn1_template *p;
+
+ for (p = rsa_asn1_templates; p->name; p++)
+ if (strcmp(name, p->name) == 0)
+ return p;
+ return NULL;
+}
diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c
index e76fc98a537a4..ffb7220b3d10a 100644
--- a/crypto/rsa-pkcs1pad.c
+++ b/crypto/rsa-pkcs1pad.c
@@ -5,104 +5,9 @@
* Copyright (c) 2015 Intel Corporation
*/

-#include <crypto/algapi.h>
-#include <crypto/akcipher.h>
-#include <crypto/internal/akcipher.h>
-#include <crypto/internal/rsa.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
+#include <crypto/internal/rsa-common.h>
#include <linux/module.h>
#include <linux/random.h>
-#include <linux/scatterlist.h>
-
-/*
- * Hash algorithm OIDs plus ASN.1 DER wrappings [RFC4880 sec 5.2.2].
- */
-static const u8 rsa_digest_info_md5[] = {
- 0x30, 0x20, 0x30, 0x0c, 0x06, 0x08,
- 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05, /* OID */
- 0x05, 0x00, 0x04, 0x10
-};
-
-static const u8 rsa_digest_info_sha1[] = {
- 0x30, 0x21, 0x30, 0x09, 0x06, 0x05,
- 0x2b, 0x0e, 0x03, 0x02, 0x1a,
- 0x05, 0x00, 0x04, 0x14
-};
-
-static const u8 rsa_digest_info_rmd160[] = {
- 0x30, 0x21, 0x30, 0x09, 0x06, 0x05,
- 0x2b, 0x24, 0x03, 0x02, 0x01,
- 0x05, 0x00, 0x04, 0x14
-};
-
-static const u8 rsa_digest_info_sha224[] = {
- 0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09,
- 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04,
- 0x05, 0x00, 0x04, 0x1c
-};
-
-static const u8 rsa_digest_info_sha256[] = {
- 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09,
- 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01,
- 0x05, 0x00, 0x04, 0x20
-};
-
-static const u8 rsa_digest_info_sha384[] = {
- 0x30, 0x41, 0x30, 0x0d, 0x06, 0x09,
- 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02,
- 0x05, 0x00, 0x04, 0x30
-};
-
-static const u8 rsa_digest_info_sha512[] = {
- 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09,
- 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03,
- 0x05, 0x00, 0x04, 0x40
-};
-
-static const struct rsa_asn1_template {
- const char *name;
- const u8 *data;
- size_t size;
-} rsa_asn1_templates[] = {
-#define _(X) { #X, rsa_digest_info_##X, sizeof(rsa_digest_info_##X) }
- _(md5),
- _(sha1),
- _(rmd160),
- _(sha256),
- _(sha384),
- _(sha512),
- _(sha224),
- { NULL }
-#undef _
-};
-
-static const struct rsa_asn1_template *rsa_lookup_asn1(const char *name)
-{
- const struct rsa_asn1_template *p;
-
- for (p = rsa_asn1_templates; p->name; p++)
- if (strcmp(name, p->name) == 0)
- return p;
- return NULL;
-}
-
-struct rsapad_tfm_ctx {
- struct crypto_akcipher *child;
- unsigned int key_size;
-};
-
-struct rsapad_inst_ctx {
- struct crypto_akcipher_spawn spawn;
- const struct rsa_asn1_template *digest_info;
-};
-
-struct rsapad_akciper_req_ctx {
- struct scatterlist in_sg[2], out_sg[1];
- uint8_t *in_buf, *out_buf;
- struct akcipher_request child_req;
-};

static int rsapad_set_pub_key(struct crypto_akcipher *tfm, const void *key,
unsigned int keylen)
diff --git a/include/crypto/internal/rsa-common.h b/include/crypto/internal/rsa-common.h
new file mode 100644
index 0000000000000..ecdce0cdafaa3
--- /dev/null
+++ b/include/crypto/internal/rsa-common.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2015 Intel Corporation
+ * Copyright (C) 2021 SUSE
+ *
+ */
+#ifndef _RSA_COMMON_
+#define _RSA_COMMON_
+
+#include <crypto/algapi.h>
+#include <crypto/internal/akcipher.h>
+#include <linux/scatterlist.h>
+
+struct rsa_asn1_template {
+ const char *name;
+ const u8 *data;
+ size_t size;
+};
+const struct rsa_asn1_template *rsa_lookup_asn1(const char *name);
+
+struct rsapad_tfm_ctx {
+ struct crypto_akcipher *child;
+ unsigned int key_size;
+};
+
+struct rsapad_inst_ctx {
+ struct crypto_akcipher_spawn spawn;
+ const struct rsa_asn1_template *digest_info;
+};
+
+struct rsapad_akciper_req_ctx {
+ struct scatterlist in_sg[2], out_sg[1];
+ uint8_t *in_buf, *out_buf;
+ struct akcipher_request child_req;
+};
+
+#endif
--
2.30.2