nxp:driver for crypto h/w accelerator caam
NXP has hardware crypto accelerator called CAAM.
- Work with Job ring
- Jobs are submitted to CAAM in the form of 64 word
descriptor.
Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I02bcfce68143b8630e1833a74c4b126972f4323d
diff --git a/drivers/nxp/crypto/caam/src/hw_key_blob.c b/drivers/nxp/crypto/caam/src/hw_key_blob.c
new file mode 100644
index 0000000..0720695
--- /dev/null
+++ b/drivers/nxp/crypto/caam/src/hw_key_blob.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2021 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "caam.h"
+#include <common/debug.h>
+#include "jobdesc.h"
+#include "sec_hw_specific.h"
+
+
+/* Callback function after Instantiation decsriptor is submitted to SEC
+ */
+static void blob_done(uint32_t *desc, uint32_t status, void *arg,
+ void *job_ring)
+{
+ INFO("Blob Desc SUCCESS with status %x\n", status);
+}
+
+/* @brief Submit descriptor to create blob
+ * @retval 0 on success
+ * @retval -1 on error
+ */
+int get_hw_unq_key_blob_hw(uint8_t *hw_key, int size)
+{
+ int ret = 0;
+ int i = 0;
+
+ uint32_t key_sz = KEY_IDNFR_SZ_BYTES;
+ uint8_t key_data[KEY_IDNFR_SZ_BYTES];
+ uint8_t in_data[16];
+ uint8_t out_data[16 + KEY_BLOB_SIZE + MAC_SIZE];
+ struct job_descriptor desc __aligned(CACHE_WRITEBACK_GRANULE);
+ struct job_descriptor *jobdesc = &desc;
+ uint32_t in_sz = 16U;
+
+ /* Output blob will have 32 bytes key blob in beginning and
+ * 16 byte HMAC identifier at end of data blob
+ */
+ uint32_t out_sz = in_sz + KEY_BLOB_SIZE + MAC_SIZE;
+
+ uint32_t operation = CMD_OPERATION | OP_TYPE_ENCAP_PROTOCOL |
+ OP_PCLID_BLOB | BLOB_PROTO_INFO;
+
+ memset(key_data, 0xff, KEY_IDNFR_SZ_BYTES);
+ memset(in_data, 0x00, in_sz);
+ memset(out_data, 0x00, in_sz);
+
+ jobdesc->arg = NULL;
+ jobdesc->callback = blob_done;
+
+ INFO("\nGenerating Master Key Verification Blob.\n");
+
+ /* Create the hw_rng descriptor */
+ ret = cnstr_hw_encap_blob_jobdesc(jobdesc->desc, key_data, key_sz,
+ CLASS_2, in_data, in_sz, out_data,
+ out_sz, operation);
+
+ /* Finally, generate the blob. */
+ ret = run_descriptor_jr(jobdesc);
+ if (ret != 0) {
+ ERROR("Error in running hw unq key blob descriptor\n");
+ return -1;
+ }
+ /* Copying alternate bytes of the Master Key Verification Blob.
+ */
+ for (i = 0; i < size; i++) {
+ hw_key[i] = out_data[2 * i];
+ }
+
+ return ret;
+}