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Diffstat (limited to 'target/linux/layerscape/patches-5.4/810-keys-0001-security-keys-secure_key-Adds-the-secure-key-support.patch')
-rw-r--r--target/linux/layerscape/patches-5.4/810-keys-0001-security-keys-secure_key-Adds-the-secure-key-support.patch1285
1 files changed, 0 insertions, 1285 deletions
diff --git a/target/linux/layerscape/patches-5.4/810-keys-0001-security-keys-secure_key-Adds-the-secure-key-support.patch b/target/linux/layerscape/patches-5.4/810-keys-0001-security-keys-secure_key-Adds-the-secure-key-support.patch
deleted file mode 100644
index 2347212a91..0000000000
--- a/target/linux/layerscape/patches-5.4/810-keys-0001-security-keys-secure_key-Adds-the-secure-key-support.patch
+++ /dev/null
@@ -1,1285 +0,0 @@
-From 808871b2943a386165614daf2e7f5fb5b33e9fd1 Mon Sep 17 00:00:00 2001
-From: Udit Agarwal <udit.agarwal@nxp.com>
-Date: Wed, 4 Jul 2018 09:51:59 +0530
-Subject: [PATCH] security/keys/secure_key: Adds the secure key support based
- on CAAM.
-
-Secure keys are derieved using CAAM crypto block.
-
-Secure keys derieved are the random number symmetric keys from CAAM.
-Blobs corresponding to the key are formed using CAAM. User space
-will only be able to view the blob of the key.
-
-Signed-off-by: Udit Agarwal <udit.agarwal@nxp.com>
-Reviewed-by: Sahil Malhotra <sahil.malhotra@nxp.com>
----
- Documentation/security/keys/secure-key.rst | 67 ++++
- MAINTAINERS | 11 +
- include/keys/secure-type.h | 33 ++
- security/keys/Kconfig | 11 +
- security/keys/Makefile | 5 +
- security/keys/secure_key.c | 339 ++++++++++++++++
- security/keys/securekey_desc.c | 608 +++++++++++++++++++++++++++++
- security/keys/securekey_desc.h | 141 +++++++
- 8 files changed, 1215 insertions(+)
- create mode 100644 Documentation/security/keys/secure-key.rst
- create mode 100644 include/keys/secure-type.h
- create mode 100644 security/keys/secure_key.c
- create mode 100644 security/keys/securekey_desc.c
- create mode 100644 security/keys/securekey_desc.h
-
---- /dev/null
-+++ b/Documentation/security/keys/secure-key.rst
-@@ -0,0 +1,67 @@
-+==========
-+Secure Key
-+==========
-+
-+Secure key is the new type added to kernel key ring service.
-+Secure key is a symmetric type key of minimum length 32 bytes
-+and with maximum possible length to be 128 bytes. It is produced
-+in kernel using the CAAM crypto engine. Userspace can only see
-+the blob for the corresponding key. All the blobs are displayed
-+or loaded in hex ascii.
-+
-+Secure key can be created on platforms which supports CAAM
-+hardware block. Secure key can also be used as a master key to
-+create the encrypted keys along with the existing key types in
-+kernel.
-+
-+Secure key uses CAAM hardware to generate the key and blobify its
-+content for userspace. Generated blobs are tied up with the hardware
-+secret key stored in CAAM, hence the same blob will not be able to
-+de-blobify with the different secret key on another machine.
-+
-+Usage::
-+
-+ keyctl add secure <name> "new <keylen>" <ring>
-+ keyctl load secure <name> "load <hex_blob>" <ring>
-+ keyctl print <key_id>
-+
-+"keyctl add secure" option will create the random data of the
-+specified key len using CAAM and store it as a key in kernel.
-+Key contents will be displayed as blobs to the user in hex ascii.
-+User can input key len from 32 bytes to 128 bytes.
-+
-+"keyctl load secure" option will load the blob contents. In kernel,
-+key will be deirved using input blob and CAAM, along with the secret
-+key stored in CAAM.
-+
-+"keyctl print" will return the hex string of the blob corresponding to
-+key_id. Returned blob will be of key_len + 48 bytes. Extra 48 bytes are
-+the header bytes added by the CAAM.
-+
-+Example of secure key usage::
-+
-+1. Create the secure key with name kmk-master of length 32 bytes::
-+
-+ $ keyctl add secure kmk-master "new 32" @u
-+ 46001928
-+
-+ $keyctl show
-+ Session Keyring
-+ 1030783626 --alswrv 0 65534 keyring: _uid_ses.0
-+ 695927745 --alswrv 0 65534 \_ keyring: _uid.0
-+ 46001928 --als-rv 0 0 \_ secure: kmk-master
-+
-+2. Print the blob contents for the kmk-master key::
-+
-+ $ keyctl print 46001928
-+ d9743445b640f3d59c1670dddc0bc9c2
-+ 34fc9aab7dd05c965e6120025012f029b
-+ 07faa4776c4f6ed02899e35a135531e9a
-+ 6e5c2b51132f9d5aef28f68738e658296
-+ 3fe583177cfe50d2542b659a13039
-+
-+ $ keyctl pipe 46001928 > secure_key.blob
-+
-+3. Load the blob in the user key ring::
-+
-+ $ keyctl load secure kmk-master "load 'cat secure_key.blob'" @u
---- a/MAINTAINERS
-+++ b/MAINTAINERS
-@@ -9075,6 +9075,17 @@ F: include/keys/trusted-type.h
- F: security/keys/trusted.c
- F: include/keys/trusted.h
-
-+KEYS-SECURE
-+M: Udit Agarwal <udit.agarwal@nxp.com>
-+R: Sahil Malhotra <sahil.malhotra@nxp.com>
-+L: linux-security-module@vger.kernel.org
-+L: keyrings@vger.kernel.org
-+S: Supported
-+F: include/keys/secure-type.h
-+F: security/keys/secure_key.c
-+F: security/keys/securekey_desc.c
-+F: security/keys/securekey_desc.h
-+
- KEYS/KEYRINGS:
- M: David Howells <dhowells@redhat.com>
- M: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---- /dev/null
-+++ b/include/keys/secure-type.h
-@@ -0,0 +1,33 @@
-+/* SPDX-License-Identifier: GPL-2.0 */
-+/*
-+ * Copyright (C) 2018 NXP.
-+ *
-+ */
-+
-+#ifndef _KEYS_SECURE_TYPE_H
-+#define _KEYS_SECURE_TYPE_H
-+
-+#include <linux/key.h>
-+#include <linux/rcupdate.h>
-+
-+/* Minimum key size to be used is 32 bytes and maximum key size fixed
-+ * is 128 bytes.
-+ * Blob size to be kept is Maximum key size + blob header added by CAAM.
-+ */
-+
-+#define MIN_KEY_SIZE 32
-+#define MAX_KEY_SIZE 128
-+#define BLOB_HEADER_SIZE 48
-+
-+#define MAX_BLOB_SIZE (MAX_KEY_SIZE + BLOB_HEADER_SIZE)
-+
-+struct secure_key_payload {
-+ struct rcu_head rcu;
-+ unsigned int key_len;
-+ unsigned int blob_len;
-+ unsigned char key[MAX_KEY_SIZE + 1];
-+ unsigned char blob[MAX_BLOB_SIZE];
-+};
-+
-+extern struct key_type key_type_secure;
-+#endif
---- a/security/keys/Kconfig
-+++ b/security/keys/Kconfig
-@@ -90,6 +90,17 @@ config TRUSTED_KEYS
-
- If you are unsure as to whether this is required, answer N.
-
-+config SECURE_KEYS
-+ tristate "SECURE_KEYS"
-+ depends on KEYS && CRYPTO_DEV_FSL_CAAM && CRYPTO_DEV_FSL_CAAM_JR
-+ help
-+ This option provide support for creating secure-type key and blobs
-+ in kernel. Secure keys are random number symmetric keys generated
-+ from CAAM. The CAAM creates the blobs for the random key.
-+ Userspace will only be able to see the blob.
-+
-+ If you are unsure as to whether this is required, answer N.
-+
- config ENCRYPTED_KEYS
- tristate "ENCRYPTED KEYS"
- depends on KEYS
---- a/security/keys/Makefile
-+++ b/security/keys/Makefile
-@@ -29,4 +29,9 @@ obj-$(CONFIG_ASYMMETRIC_KEY_TYPE) += key
- #
- obj-$(CONFIG_BIG_KEYS) += big_key.o
- obj-$(CONFIG_TRUSTED_KEYS) += trusted.o
-+CFLAGS_secure_key.o += -I$(obj)/../../drivers/crypto/caam/
-+CFLAGS_securekey_desc.o += -I$(obj)/../../drivers/crypto/caam/
-+obj-$(CONFIG_SECURE_KEYS) += securekey.o
-+securekey-y := securekey_desc.o \
-+ secure_key.o
- obj-$(CONFIG_ENCRYPTED_KEYS) += encrypted-keys/
---- /dev/null
-+++ b/security/keys/secure_key.c
-@@ -0,0 +1,339 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/* Copyright (C) 2018 NXP
-+ * Secure key is generated using NXP CAAM hardware block. CAAM generates the
-+ * random number (used as a key) and creates its blob for the user.
-+ */
-+
-+#include <linux/slab.h>
-+#include <linux/parser.h>
-+#include <linux/string.h>
-+#include <linux/key-type.h>
-+#include <linux/rcupdate.h>
-+#include <keys/secure-type.h>
-+#include <linux/completion.h>
-+
-+#include "securekey_desc.h"
-+
-+static const char hmac_alg[] = "hmac(sha1)";
-+static const char hash_alg[] = "sha1";
-+
-+static struct crypto_shash *hashalg;
-+static struct crypto_shash *hmacalg;
-+
-+enum {
-+ error = -1,
-+ new_key,
-+ load_blob,
-+};
-+
-+static const match_table_t key_tokens = {
-+ {new_key, "new"},
-+ {load_blob, "load"},
-+ {error, NULL}
-+};
-+
-+static struct secure_key_payload *secure_payload_alloc(struct key *key)
-+{
-+ struct secure_key_payload *sec_key = NULL;
-+ int ret = 0;
-+
-+ ret = key_payload_reserve(key, sizeof(*sec_key));
-+ if (ret < 0)
-+ goto out;
-+
-+ sec_key = kzalloc(sizeof(*sec_key), GFP_KERNEL);
-+ if (!sec_key)
-+ goto out;
-+
-+out:
-+ return sec_key;
-+}
-+
-+/*
-+ * parse_inputdata - parse the keyctl input data and fill in the
-+ * payload structure for key or its blob.
-+ * param[in]: data pointer to the data to be parsed for creating key.
-+ * param[in]: p pointer to secure key payload structure to fill parsed data
-+ * On success returns 0, otherwise -EINVAL.
-+ */
-+static int parse_inputdata(char *data, struct secure_key_payload *p)
-+{
-+ substring_t args[MAX_OPT_ARGS];
-+ long keylen = 0;
-+ int ret = -EINVAL;
-+ int key_cmd = -EINVAL;
-+ char *c = NULL;
-+
-+ c = strsep(&data, " \t");
-+ if (!c) {
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+
-+ /* Get the keyctl command i.e. new_key or load_blob etc */
-+ key_cmd = match_token(c, key_tokens, args);
-+
-+ switch (key_cmd) {
-+ case new_key:
-+ /* first argument is key size */
-+ c = strsep(&data, " \t");
-+ if (!c) {
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+
-+ ret = kstrtol(c, 10, &keylen);
-+ if (ret < 0 || keylen < MIN_KEY_SIZE ||
-+ keylen > MAX_KEY_SIZE) {
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+
-+ p->key_len = keylen;
-+ ret = new_key;
-+
-+ break;
-+ case load_blob:
-+ /* first argument is blob data for CAAM*/
-+ c = strsep(&data, " \t");
-+ if (!c) {
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+
-+ /* Blob_len = No of characters in blob/2 */
-+ p->blob_len = strlen(c) / 2;
-+ if (p->blob_len > MAX_BLOB_SIZE) {
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+
-+ ret = hex2bin(p->blob, c, p->blob_len);
-+ if (ret < 0) {
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+ ret = load_blob;
-+
-+ break;
-+ case error:
-+ ret = -EINVAL;
-+ break;
-+ }
-+
-+out:
-+ return ret;
-+}
-+
-+/*
-+ * secure_instantiate - create a new secure type key.
-+ * Supports the operation to generate a new key. A random number
-+ * is generated from CAAM as key data and the corresponding red blob
-+ * is formed and stored as key_blob.
-+ * Also supports the operation to load the blob and key is derived using
-+ * that blob from CAAM.
-+ * On success, return 0. Otherwise return errno.
-+ */
-+static int secure_instantiate(struct key *key,
-+ struct key_preparsed_payload *prep)
-+{
-+ struct secure_key_payload *payload = NULL;
-+ size_t datalen = prep->datalen;
-+ char *data = NULL;
-+ int key_cmd = 0;
-+ int ret = 0;
-+ enum sk_req_type sk_op_type;
-+ struct device *dev = NULL;
-+
-+ if (datalen <= 0 || datalen > 32767 || !prep->data) {
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+
-+ data = kmalloc(datalen + 1, GFP_KERNEL);
-+ if (!data) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ memcpy(data, prep->data, datalen);
-+ data[datalen] = '\0';
-+
-+ payload = secure_payload_alloc(key);
-+ if (!payload) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ /* Allocate caam job ring for operation to be performed from CAAM */
-+ dev = caam_jr_alloc();
-+ if (!dev) {
-+ pr_info("caam_jr_alloc failed\n");
-+ ret = -ENODEV;
-+ goto out;
-+ }
-+
-+ key_cmd = parse_inputdata(data, payload);
-+ if (key_cmd < 0) {
-+ ret = key_cmd;
-+ goto out;
-+ }
-+
-+ switch (key_cmd) {
-+ case load_blob:
-+ /*
-+ * Red blob decryption to be done for load operation
-+ * to derive the key.
-+ */
-+ sk_op_type = sk_red_blob_dec;
-+ ret = key_deblob(payload, sk_op_type, dev);
-+ if (ret != 0) {
-+ pr_info("secure_key: key_blob decap fail (%d)\n", ret);
-+ goto out;
-+ }
-+ break;
-+ case new_key:
-+ /* Get Random number from caam of the specified length */
-+ sk_op_type = sk_get_random;
-+ ret = caam_get_random(payload, sk_op_type, dev);
-+ if (ret != 0) {
-+ pr_info("secure_key: get_random fail (%d)\n", ret);
-+ goto out;
-+ }
-+
-+ /* Generate red blob of key random bytes with CAAM */
-+ sk_op_type = sk_red_blob_enc;
-+ ret = key_blob(payload, sk_op_type, dev);
-+ if (ret != 0) {
-+ pr_info("secure_key: key_blob encap fail (%d)\n", ret);
-+ goto out;
-+ }
-+ break;
-+ default:
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+out:
-+ if (data)
-+ kzfree(data);
-+ if (dev)
-+ caam_jr_free(dev);
-+
-+ if (!ret)
-+ rcu_assign_keypointer(key, payload);
-+ else
-+ kzfree(payload);
-+
-+ return ret;
-+}
-+
-+/*
-+ * secure_read - copy the blob data to userspace in hex.
-+ * param[in]: key pointer to key struct
-+ * param[in]: buffer pointer to user data for creating key
-+ * param[in]: buflen is the length of the buffer
-+ * On success, return to userspace the secure key data size.
-+ */
-+static long secure_read(const struct key *key, char __user *buffer,
-+ size_t buflen)
-+{
-+ const struct secure_key_payload *p = NULL;
-+ char *ascii_buf;
-+ char *bufp;
-+ int i;
-+
-+ p = dereference_key_locked(key);
-+ if (!p)
-+ return -EINVAL;
-+
-+ if (buffer && buflen >= 2 * p->blob_len) {
-+ ascii_buf = kmalloc(2 * p->blob_len, GFP_KERNEL);
-+ if (!ascii_buf)
-+ return -ENOMEM;
-+
-+ bufp = ascii_buf;
-+ for (i = 0; i < p->blob_len; i++)
-+ bufp = hex_byte_pack(bufp, p->blob[i]);
-+ if (copy_to_user(buffer, ascii_buf, 2 * p->blob_len) != 0) {
-+ kzfree(ascii_buf);
-+ return -EFAULT;
-+ }
-+ kzfree(ascii_buf);
-+ }
-+ return 2 * p->blob_len;
-+}
-+
-+/*
-+ * secure_destroy - clear and free the key's payload
-+ */
-+static void secure_destroy(struct key *key)
-+{
-+ kzfree(key->payload.data[0]);
-+}
-+
-+struct key_type key_type_secure = {
-+ .name = "secure",
-+ .instantiate = secure_instantiate,
-+ .destroy = secure_destroy,
-+ .read = secure_read,
-+};
-+EXPORT_SYMBOL_GPL(key_type_secure);
-+
-+static void secure_shash_release(void)
-+{
-+ if (hashalg)
-+ crypto_free_shash(hashalg);
-+ if (hmacalg)
-+ crypto_free_shash(hmacalg);
-+}
-+
-+static int __init secure_shash_alloc(void)
-+{
-+ int ret;
-+
-+ hmacalg = crypto_alloc_shash(hmac_alg, 0, CRYPTO_ALG_ASYNC);
-+ if (IS_ERR(hmacalg)) {
-+ pr_info("secure_key: could not allocate crypto %s\n",
-+ hmac_alg);
-+ return PTR_ERR(hmacalg);
-+ }
-+
-+ hashalg = crypto_alloc_shash(hash_alg, 0, CRYPTO_ALG_ASYNC);
-+ if (IS_ERR(hashalg)) {
-+ pr_info("secure_key: could not allocate crypto %s\n",
-+ hash_alg);
-+ ret = PTR_ERR(hashalg);
-+ goto hashalg_fail;
-+ }
-+
-+ return 0;
-+
-+hashalg_fail:
-+ crypto_free_shash(hmacalg);
-+ return ret;
-+}
-+
-+static int __init init_secure_key(void)
-+{
-+ int ret;
-+
-+ ret = secure_shash_alloc();
-+ if (ret < 0)
-+ return ret;
-+
-+ ret = register_key_type(&key_type_secure);
-+ if (ret < 0)
-+ secure_shash_release();
-+ return ret;
-+}
-+
-+static void __exit cleanup_secure_key(void)
-+{
-+ secure_shash_release();
-+ unregister_key_type(&key_type_secure);
-+}
-+
-+late_initcall(init_secure_key);
-+module_exit(cleanup_secure_key);
-+
-+MODULE_LICENSE("GPL");
---- /dev/null
-+++ b/security/keys/securekey_desc.c
-@@ -0,0 +1,608 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * Copyright (C) 2018 NXP
-+ *
-+ */
-+
-+#include <keys/secure-type.h>
-+#include "securekey_desc.h"
-+
-+/* key modifier for blob encapsulation & decapsulation descriptor */
-+u8 key_modifier[] = "SECURE_KEY";
-+u32 key_modifier_len = 10;
-+
-+void caam_sk_rng_desc(struct sk_req *skreq, struct sk_desc *skdesc)
-+{
-+ struct sk_fetch_rnd_data *fetch_rnd_data = NULL;
-+ struct random_desc *rnd_desc = NULL;
-+ size_t len = 0;
-+ u32 *desc = skreq->hwdesc;
-+
-+ init_job_desc(desc, 0);
-+
-+ fetch_rnd_data = &skreq->req_u.sk_fetch_rnd_data;
-+ rnd_desc = &skdesc->dma_u.random_descp;
-+ len = fetch_rnd_data->key_len;
-+
-+ /* command 0x82500000 */
-+ append_cmd(desc, CMD_OPERATION | OP_TYPE_CLASS1_ALG |
-+ OP_ALG_ALGSEL_RNG);
-+ /* command 0x60340000 | len */
-+ append_cmd(desc, CMD_FIFO_STORE | FIFOST_TYPE_RNGSTORE | len);
-+ append_ptr(desc, rnd_desc->rnd_data);
-+}
-+
-+void caam_sk_redblob_encap_desc(struct sk_req *skreq, struct sk_desc *skdesc)
-+{
-+ struct redblob_encap_desc *red_blob_desc =
-+ &skdesc->dma_u.redblob_encapdesc;
-+ struct sk_red_blob_encap *red_blob_req =
-+ &skreq->req_u.sk_red_blob_encap;
-+ u32 *desc = skreq->hwdesc;
-+
-+ init_job_desc(desc, 0);
-+
-+ /* Load class 2 key with key modifier. */
-+ append_key_as_imm(desc, key_modifier, key_modifier_len,
-+ key_modifier_len, CLASS_2 | KEY_DEST_CLASS_REG);
-+
-+ /* SEQ IN PTR Command. */
-+ append_seq_in_ptr(desc, red_blob_desc->in_data, red_blob_req->data_sz,
-+ 0);
-+
-+ /* SEQ OUT PTR Command. */
-+ append_seq_out_ptr(desc, red_blob_desc->redblob,
-+ red_blob_req->redblob_sz, 0);
-+
-+ /* RedBlob encapsulation PROTOCOL Command. */
-+ append_operation(desc, OP_TYPE_ENCAP_PROTOCOL | OP_PCLID_BLOB);
-+}
-+
-+/* void caam_sk_redblob_decap_desc(struct sk_req *skreq, struct sk_desc *skdesc)
-+ * brief CAAM Descriptor creator from redblob to plaindata.
-+ * param[in] skreq Pointer to secure key request structure
-+ * param[in] skdesc Pointer to secure key descriptor structure
-+ */
-+void caam_sk_redblob_decap_desc(struct sk_req *skreq, struct sk_desc *skdesc)
-+{
-+ struct redblob_decap_desc *red_blob_desc =
-+ &skdesc->dma_u.redblob_decapdesc;
-+ struct sk_red_blob_decap *red_blob_req =
-+ &skreq->req_u.sk_red_blob_decap;
-+ u32 *desc = skreq->hwdesc;
-+
-+ init_job_desc(desc, 0);
-+
-+ /* Load class 2 key with key modifier. */
-+ append_key_as_imm(desc, key_modifier, key_modifier_len,
-+ key_modifier_len, CLASS_2 | KEY_DEST_CLASS_REG);
-+
-+ /* SEQ IN PTR Command. */
-+ append_seq_in_ptr(desc, red_blob_desc->redblob,
-+ red_blob_req->redblob_sz, 0);
-+
-+ /* SEQ OUT PTR Command. */
-+ append_seq_out_ptr(desc, red_blob_desc->out_data,
-+ red_blob_req->data_sz, 0);
-+
-+ /* RedBlob decapsulation PROTOCOL Command. */
-+ append_operation(desc, OP_TYPE_DECAP_PROTOCOL | OP_PCLID_BLOB);
-+}
-+
-+/* int caam_sk_get_random_map(struct device *dev, struct sk_req *req,
-+ * struct sk_desc *skdesc)
-+ * brief DMA map the buffer virtual pointers to physical address.
-+ * param[in] dev Pointer to job ring device structure
-+ * param[in] req Pointer to secure key request structure
-+ * param[in] skdesc Pointer to secure key descriptor structure
-+ * return 0 on success, error value otherwise.
-+ */
-+int caam_sk_get_random_map(struct device *dev, struct sk_req *req,
-+ struct sk_desc *skdesc)
-+{
-+ struct sk_fetch_rnd_data *fetch_rnd_data;
-+ struct random_desc *rnd_desc;
-+
-+ fetch_rnd_data = &req->req_u.sk_fetch_rnd_data;
-+ rnd_desc = &skdesc->dma_u.random_descp;
-+
-+ rnd_desc->rnd_data = dma_map_single(dev, fetch_rnd_data->data,
-+ fetch_rnd_data->key_len, DMA_FROM_DEVICE);
-+
-+ if (dma_mapping_error(dev, rnd_desc->rnd_data)) {
-+ dev_err(dev, "Unable to map memory\n");
-+ goto sk_random_map_fail;
-+ }
-+ return 0;
-+
-+sk_random_map_fail:
-+ return -ENOMEM;
-+}
-+
-+/* int caam_sk_redblob_encap_map(struct device *dev, struct sk_req *req,
-+ * struct sk_desc *skdesc)
-+ * brief DMA map the buffer virtual pointers to physical address.
-+ * param[in] dev Pointer to job ring device structure
-+ * param[in] req Pointer to secure key request structure
-+ * param[in] skdesc Pointer to secure key descriptor structure
-+ * return 0 on success, error value otherwise.
-+ */
-+int caam_sk_redblob_encap_map(struct device *dev, struct sk_req *req,
-+ struct sk_desc *skdesc)
-+{
-+ struct sk_red_blob_encap *red_blob_encap;
-+ struct redblob_encap_desc *red_blob_desc;
-+
-+ red_blob_encap = &req->req_u.sk_red_blob_encap;
-+ red_blob_desc = &skdesc->dma_u.redblob_encapdesc;
-+
-+ red_blob_desc->in_data = dma_map_single(dev, red_blob_encap->data,
-+ red_blob_encap->data_sz, DMA_TO_DEVICE);
-+ if (dma_mapping_error(dev, red_blob_desc->in_data)) {
-+ dev_err(dev, "Unable to map memory\n");
-+ goto sk_data_fail;
-+ }
-+
-+ red_blob_desc->redblob = dma_map_single(dev, red_blob_encap->redblob,
-+ red_blob_encap->redblob_sz, DMA_FROM_DEVICE);
-+ if (dma_mapping_error(dev, red_blob_desc->redblob)) {
-+ dev_err(dev, "Unable to map memory\n");
-+ goto sk_redblob_fail;
-+ }
-+
-+ return 0;
-+
-+sk_redblob_fail:
-+ dma_unmap_single(dev, red_blob_desc->in_data, red_blob_encap->data_sz,
-+ DMA_TO_DEVICE);
-+sk_data_fail:
-+ return -ENOMEM;
-+}
-+
-+/* static int caam_sk_redblob_decap_map(struct device *dev,
-+ * struct sk_req *req,
-+ * struct sk_desc *skdesc)
-+ * brief DMA map the buffer virtual pointers to physical address.
-+ * param[in] dev Pointer to job ring device structure
-+ * param[in] req Pointer to secure key request structure
-+ * param[in] skdesc Pointer to secure key descriptor structure
-+ * return 0 on success, error value otherwise.
-+ */
-+int caam_sk_redblob_decap_map(struct device *dev, struct sk_req *req,
-+ struct sk_desc *skdesc)
-+{
-+ struct sk_red_blob_decap *red_blob_decap;
-+ struct redblob_decap_desc *red_blob_desc;
-+
-+ red_blob_decap = &req->req_u.sk_red_blob_decap;
-+ red_blob_desc = &skdesc->dma_u.redblob_decapdesc;
-+
-+ red_blob_desc->redblob = dma_map_single(dev, red_blob_decap->redblob,
-+ red_blob_decap->redblob_sz, DMA_TO_DEVICE);
-+ if (dma_mapping_error(dev, red_blob_desc->redblob)) {
-+ dev_err(dev, "Unable to map memory\n");
-+ goto sk_redblob_fail;
-+ }
-+
-+ red_blob_desc->out_data = dma_map_single(dev, red_blob_decap->data,
-+ red_blob_decap->data_sz, DMA_FROM_DEVICE);
-+ if (dma_mapping_error(dev, red_blob_desc->out_data)) {
-+ dev_err(dev, "Unable to map memory\n");
-+ goto sk_data_fail;
-+ }
-+
-+ return 0;
-+
-+sk_data_fail:
-+ dma_unmap_single(dev, red_blob_desc->redblob,
-+ red_blob_decap->redblob_sz, DMA_TO_DEVICE);
-+sk_redblob_fail:
-+ return -ENOMEM;
-+}
-+
-+/* @fn void securekey_unmap(struct device *dev,
-+ * struct sk_desc *skdesc, struct sk_req *req)
-+ * @brief DMA unmap the buffer pointers.
-+ * @param[in] dev Pointer to job ring device structure
-+ * @param[in] skdesc Pointer to secure key descriptor structure
-+ * @param[in] req Pointer to secure key request structure
-+ */
-+void securekey_unmap(struct device *dev,
-+ struct sk_desc *skdesc, struct sk_req *req)
-+{
-+
-+ switch (req->type) {
-+ case sk_get_random:
-+ {
-+ struct sk_fetch_rnd_data *fetch_rnd_data;
-+ struct random_desc *rnd_desc;
-+
-+ fetch_rnd_data = &req->req_u.sk_fetch_rnd_data;
-+ rnd_desc = &skdesc->dma_u.random_descp;
-+
-+ /* Unmap Descriptor buffer pointers. */
-+ dma_unmap_single(dev, rnd_desc->rnd_data,
-+ fetch_rnd_data->key_len,
-+ DMA_FROM_DEVICE);
-+ break;
-+ }
-+ case sk_red_blob_enc:
-+ {
-+ struct sk_red_blob_encap *red_blob_encap;
-+ struct redblob_encap_desc *red_blob_desc;
-+
-+ red_blob_encap = &req->req_u.sk_red_blob_encap;
-+ red_blob_desc = &skdesc->dma_u.redblob_encapdesc;
-+
-+ /* Unmap Descriptor buffer pointers. */
-+ dma_unmap_single(dev, red_blob_desc->in_data,
-+ red_blob_encap->data_sz,
-+ DMA_TO_DEVICE);
-+
-+ dma_unmap_single(dev, red_blob_desc->redblob,
-+ red_blob_encap->redblob_sz,
-+ DMA_FROM_DEVICE);
-+
-+ break;
-+ }
-+ case sk_red_blob_dec:
-+ {
-+ struct sk_red_blob_decap *red_blob_decap;
-+ struct redblob_decap_desc *red_blob_desc;
-+
-+ red_blob_decap = &req->req_u.sk_red_blob_decap;
-+ red_blob_desc = &skdesc->dma_u.redblob_decapdesc;
-+
-+ /* Unmap Descriptor buffer pointers. */
-+ dma_unmap_single(dev, red_blob_desc->redblob,
-+ red_blob_decap->redblob_sz,
-+ DMA_TO_DEVICE);
-+
-+ dma_unmap_single(dev, red_blob_desc->out_data,
-+ red_blob_decap->data_sz,
-+ DMA_FROM_DEVICE);
-+
-+ break;
-+ }
-+ default:
-+ dev_err(dev, "Unable to find request type\n");
-+ break;
-+ }
-+ kfree(skdesc);
-+}
-+
-+/* int caam_securekey_desc_init(struct device *dev, struct sk_req *req)
-+ * brief CAAM Descriptor creator for secure key operations.
-+ * param[in] dev Pointer to job ring device structure
-+ * param[in] req Pointer to secure key request structure
-+ * return 0 on success, error value otherwise.
-+ */
-+int caam_securekey_desc_init(struct device *dev, struct sk_req *req)
-+{
-+ struct sk_desc *skdesc = NULL;
-+ int ret = 0;
-+
-+ switch (req->type) {
-+ case sk_get_random:
-+ {
-+ skdesc = kmalloc(sizeof(*skdesc), GFP_DMA);
-+ if (!skdesc) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+ skdesc->req_type = req->type;
-+
-+ if (caam_sk_get_random_map(dev, req, skdesc)) {
-+ dev_err(dev, "caam get_random map fail\n");
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+ caam_sk_rng_desc(req, skdesc);
-+ break;
-+ }
-+ case sk_red_blob_enc:
-+ {
-+ skdesc = kmalloc(sizeof(*skdesc), GFP_DMA);
-+ if (!skdesc) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ skdesc->req_type = req->type;
-+
-+ if (caam_sk_redblob_encap_map(dev, req, skdesc)) {
-+ dev_err(dev, "caam redblob_encap map fail\n");
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ /* Descriptor function to create redblob from data. */
-+ caam_sk_redblob_encap_desc(req, skdesc);
-+ break;
-+ }
-+
-+ case sk_red_blob_dec:
-+ {
-+ skdesc = kmalloc(sizeof(*skdesc), GFP_DMA);
-+ if (!skdesc) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ skdesc->req_type = req->type;
-+
-+ if (caam_sk_redblob_decap_map(dev, req, skdesc)) {
-+ dev_err(dev, "caam redblob_decap map fail\n");
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ /* Descriptor function to decap data from redblob. */
-+ caam_sk_redblob_decap_desc(req, skdesc);
-+ break;
-+ }
-+ default:
-+ pr_debug("Unknown request type\n");
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+
-+ req->desc_pointer = (void *)skdesc;
-+
-+out:
-+ return ret;
-+}
-+
-+/* static void caam_op_done (struct device *dev, u32 *desc, u32 ret,
-+ * void *context)
-+ * brief callback function to be called when descriptor executed.
-+ * param[in] dev Pointer to device structure
-+ * param[in] desc descriptor pointer
-+ * param[in] ret return status of Job submitted
-+ * param[in] context void pointer
-+ */
-+static void caam_op_done(struct device *dev, u32 *desc, u32 ret,
-+ void *context)
-+{
-+ struct sk_req *req = context;
-+
-+ if (ret) {
-+ dev_err(dev, "caam op done err: %x\n", ret);
-+ /* print the error source name. */
-+ caam_jr_strstatus(dev, ret);
-+ }
-+ /* Call securekey_unmap function for unmapping the buffer pointers. */
-+ securekey_unmap(dev, req->desc_pointer, req);
-+
-+ req->ret = ret;
-+ complete(&req->comp);
-+}
-+
-+
-+/* static int sk_job_submit(struct device *jrdev, struct sk_req *req)
-+ * brief Enqueue a Job descriptor to Job ring and wait until SEC returns.
-+ * param[in] jrdev Pointer to job ring device structure
-+ * param[in] req Pointer to secure key request structure
-+ * return 0 on success, error value otherwise.
-+ */
-+static int sk_job_submit(struct device *jrdev, struct sk_req *req)
-+{
-+ int ret;
-+
-+ init_completion(&req->comp);
-+
-+ /* caam_jr_enqueue function for Enqueue a job descriptor */
-+ ret = caam_jr_enqueue(jrdev, req->hwdesc, caam_op_done, req);
-+ if (!ret)
-+ wait_for_completion_interruptible(&req->comp);
-+
-+ ret = req->ret;
-+ return ret;
-+}
-+
-+/* caam_get_random(struct secure_key_payload *p, enum sk_req_type fetch_rnd,
-+ * struct device *dev)
-+ * Create the random number of the specified length using CAAM block
-+ * param[in]: out pointer to place the random bytes
-+ * param[in]: length for the random data bytes.
-+ * param[in]: dev Pointer to job ring device structure
-+ * If operation is successful return 0, otherwise error.
-+ */
-+int caam_get_random(struct secure_key_payload *p, enum sk_req_type fetch_rnd,
-+ struct device *dev)
-+{
-+ struct sk_fetch_rnd_data *fetch_rnd_data = NULL;
-+ struct sk_req *req = NULL;
-+ int ret = 0;
-+ void *temp = NULL;
-+
-+ req = kmalloc(sizeof(struct sk_req), GFP_DMA);
-+ if (!req) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ req->type = fetch_rnd;
-+ fetch_rnd_data = &(req->req_u.sk_fetch_rnd_data);
-+
-+ /* initialise with key length */
-+ fetch_rnd_data->key_len = p->key_len;
-+
-+ temp = kmalloc(fetch_rnd_data->key_len, GFP_DMA);
-+ if (!temp) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+ fetch_rnd_data->data = temp;
-+
-+ ret = caam_securekey_desc_init(dev, req);
-+
-+ if (ret) {
-+ pr_info("caam_securekey_desc_init failed\n");
-+ goto out;
-+ }
-+
-+ ret = sk_job_submit(dev, req);
-+ if (!ret) {
-+ /*Copy output to key buffer. */
-+ memcpy(p->key, fetch_rnd_data->data, p->key_len);
-+ } else {
-+ ret = -EINVAL;
-+ }
-+
-+out:
-+ if (req)
-+ kfree(req);
-+
-+ if (temp)
-+ kfree(temp);
-+
-+ return ret;
-+}
-+EXPORT_SYMBOL(caam_get_random);
-+
-+/* key_deblob(struct secure_key_payload *p, enum sk_req_type decap_type
-+ * struct device *dev)
-+ * Deblobify the blob to get the key data and fill in secure key payload struct
-+ * param[in] p pointer to the secure key payload
-+ * param[in] decap_type operation to be done.
-+ * param[in] dev dev Pointer to job ring device structure
-+ * If operation is successful return 0, otherwise error.
-+ */
-+int key_deblob(struct secure_key_payload *p, enum sk_req_type decap_type,
-+ struct device *dev)
-+{
-+ unsigned int blob_len;
-+ struct sk_red_blob_decap *d_blob;
-+ struct sk_req *req = NULL;
-+ int total_sz = 0, *temp = NULL, ret = 0;
-+
-+ req = kmalloc(sizeof(struct sk_req), GFP_DMA);
-+ if (!req) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ d_blob = &(req->req_u.sk_red_blob_decap);
-+ blob_len = p->blob_len;
-+ req->type = decap_type;
-+
-+ /*
-+ * Red blob size is the blob_len filled in payload struct
-+ * Data_sz i.e. key is the blob_len - blob header size
-+ */
-+
-+ d_blob->redblob_sz = blob_len;
-+ d_blob->data_sz = blob_len - (SK_BLOB_KEY_SZ + SK_BLOB_MAC_SZ);
-+ total_sz = d_blob->data_sz + d_blob->redblob_sz;
-+
-+ temp = kmalloc(total_sz, GFP_DMA);
-+ if (!temp) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ req->mem_pointer = temp;
-+ d_blob->redblob = temp;
-+ d_blob->data = d_blob->redblob + d_blob->redblob_sz;
-+ memcpy(d_blob->redblob, p->blob, blob_len);
-+
-+ ret = caam_securekey_desc_init(dev, req);
-+
-+ if (ret) {
-+ pr_info("caam_securekey_desc_init: Failed\n");
-+ goto out;
-+ }
-+
-+ ret = sk_job_submit(dev, req);
-+ if (!ret) {
-+ /*Copy output to key buffer. */
-+ p->key_len = d_blob->data_sz;
-+ memcpy(p->key, d_blob->data, p->key_len);
-+ } else {
-+ ret = -EINVAL;
-+ }
-+
-+out:
-+ if (temp)
-+ kfree(temp);
-+ if (req)
-+ kfree(req);
-+ return ret;
-+}
-+EXPORT_SYMBOL(key_deblob);
-+
-+/* key_blob(struct secure_key_payload *p, enum sk_req_type encap_type,
-+ * struct device *dev)
-+ * To blobify the key data to get the blob. This blob can only be seen by
-+ * userspace.
-+ * param[in] p pointer to the secure key payload
-+ * param[in] decap_type operation to be done.
-+ * param[in] dev dev Pointer to job ring device structure
-+ * If operation is successful return 0, otherwise error.
-+ */
-+int key_blob(struct secure_key_payload *p, enum sk_req_type encap_type,
-+ struct device *dev)
-+{
-+ unsigned int key_len;
-+ struct sk_red_blob_encap *k_blob;
-+ struct sk_req *req = NULL;
-+ int total_sz = 0, *temp = NULL, ret = 0;
-+
-+ req = kmalloc(sizeof(struct sk_req), GFP_DMA);
-+ if (!req) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ key_len = p->key_len;
-+
-+ req->type = encap_type;
-+ k_blob = &(req->req_u.sk_red_blob_encap);
-+
-+ /*
-+ * Data_sz i.e. key len and the corresponding blob_len is
-+ * key_len + BLOB header size.
-+ */
-+
-+ k_blob->data_sz = key_len;
-+ k_blob->redblob_sz = key_len + SK_BLOB_KEY_SZ + SK_BLOB_MAC_SZ;
-+ total_sz = k_blob->data_sz + k_blob->redblob_sz;
-+
-+ temp = kmalloc(total_sz, GFP_DMA);
-+ if (!temp) {
-+ ret = -ENOMEM;
-+ goto out;
-+ }
-+
-+ req->mem_pointer = temp;
-+ k_blob->data = temp;
-+
-+ k_blob->redblob = k_blob->data + k_blob->data_sz;
-+ memcpy(k_blob->data, p->key, key_len);
-+
-+ ret = caam_securekey_desc_init(dev, req);
-+
-+ if (ret) {
-+ pr_info("caam_securekey_desc_init failed\n");
-+ goto out;
-+ }
-+
-+ ret = sk_job_submit(dev, req);
-+ if (!ret) {
-+ /*Copy output to key buffer. */
-+ p->blob_len = k_blob->redblob_sz;
-+ memcpy(p->blob, k_blob->redblob, p->blob_len);
-+ } else {
-+ ret = -EINVAL;
-+ }
-+
-+out:
-+ if (temp)
-+ kfree(req->mem_pointer);
-+ if (req)
-+ kfree(req);
-+ return ret;
-+
-+}
-+EXPORT_SYMBOL(key_blob);
---- /dev/null
-+++ b/security/keys/securekey_desc.h
-@@ -0,0 +1,141 @@
-+/* SPDX-License-Identifier: GPL-2.0 */
-+/*
-+ * Copyright 2018 NXP
-+ *
-+ */
-+#ifndef _SECUREKEY_DESC_H_
-+#define _SECUREKEY_DESC_H_
-+
-+#include "compat.h"
-+#include "regs.h"
-+#include "intern.h"
-+#include "desc.h"
-+#include "desc_constr.h"
-+#include "jr.h"
-+#include "error.h"
-+#include "pdb.h"
-+
-+#define SK_BLOB_KEY_SZ 32 /* Blob key size. */
-+#define SK_BLOB_MAC_SZ 16 /* Blob MAC size. */
-+
-+/*
-+ * brief defines different kinds of operations supported by this module.
-+ */
-+enum sk_req_type {
-+ sk_get_random,
-+ sk_red_blob_enc,
-+ sk_red_blob_dec,
-+};
-+
-+
-+/*
-+ * struct random_des
-+ * param[out] rnd_data output buffer for random data.
-+ */
-+struct random_desc {
-+ dma_addr_t rnd_data;
-+};
-+
-+/* struct redblob_encap_desc
-+ * details Structure containing dma address for redblob encapsulation.
-+ * param[in] in_data input data to redblob encap descriptor.
-+ * param[out] redblob output buffer for redblob.
-+ */
-+struct redblob_encap_desc {
-+ dma_addr_t in_data;
-+ dma_addr_t redblob;
-+};
-+
-+/* struct redblob_decap_desc
-+ * details Structure containing dma address for redblob decapsulation.
-+ * param[in] redblob input buffer to redblob decap descriptor.
-+ * param[out] out_data output data from redblob decap descriptor.
-+ */
-+struct redblob_decap_desc {
-+ dma_addr_t redblob;
-+ dma_addr_t out_data;
-+};
-+
-+/* struct sk_desc
-+ * details Structure for securekey descriptor creation.
-+ * param[in] req_type operation supported.
-+ * param[in] dma_u union of struct for supported operation.
-+ */
-+struct sk_desc {
-+ u32 req_type;
-+ union {
-+ struct redblob_encap_desc redblob_encapdesc;
-+ struct redblob_decap_desc redblob_decapdesc;
-+ struct random_desc random_descp;
-+ } dma_u;
-+};
-+
-+/* struct sk_fetch_rnd_data
-+ * decriptor structure containing key length.
-+ */
-+struct sk_fetch_rnd_data {
-+ void *data;
-+ size_t key_len;
-+};
-+
-+/* struct sk_red_blob_encap
-+ * details Structure containing buffer pointers for redblob encapsulation.
-+ * param[in] data Input data.
-+ * param[in] data_sz size of Input data.
-+ * param[out] redblob output buffer for redblob.
-+ * param[in] redblob_sz size of redblob.
-+ */
-+struct sk_red_blob_encap {
-+ void *data;
-+ uint32_t data_sz;
-+ void *redblob;
-+ uint32_t redblob_sz;
-+};
-+
-+/* struct sk_red_blob_decap
-+ * details Structure containing buffer pointers for redblob decapsulation.
-+ * param[in] redblob Input redblob.
-+ * param[in] redblob_sz size of redblob.
-+ * param[out] data output buffer for data.
-+ * param[in] data_sz size of output data.
-+ */
-+struct sk_red_blob_decap {
-+ void *redblob;
-+ uint32_t redblob_sz;
-+ void *data;
-+ uint32_t data_sz;
-+};
-+
-+/* struct sk_req
-+ * details Structure for securekey request creation.
-+ * param[in] type operation supported.
-+ * param[in] req_u union of struct for supported operation.
-+ * param[out] ret return status of CAAM operation.
-+ * param[in] mem_pointer memory pointer for allocated kernel memory.
-+ * param[in] desc_pointer Pointer to securekey descriptor creation structure.
-+ * param[in] comp struct completion object.
-+ * param[in] hwdesc contains descriptor instructions.
-+ */
-+struct sk_req {
-+ enum sk_req_type type;
-+ void *arg;
-+ union {
-+ struct sk_red_blob_encap sk_red_blob_encap;
-+ struct sk_red_blob_decap sk_red_blob_decap;
-+ struct sk_fetch_rnd_data sk_fetch_rnd_data;
-+ } req_u;
-+ int ret;
-+ void *mem_pointer;
-+ void *desc_pointer;
-+ struct completion comp;
-+ u32 hwdesc[MAX_CAAM_DESCSIZE];
-+};
-+
-+int caam_get_random(struct secure_key_payload *p, enum sk_req_type fetch_rnd,
-+ struct device *dev);
-+int key_blob(struct secure_key_payload *p, enum sk_req_type encap_type,
-+ struct device *dev);
-+int key_deblob(struct secure_key_payload *p, enum sk_req_type decap_type,
-+ struct device *dev);
-+
-+#endif /*_SECUREKEY_DESC_H_*/
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-09 00:59:32 +0000