imx6: Added DEK blob generator command
Freescale's SEC block has built-in Data Encryption
Key(DEK) Blob Protocol which provides a method for
protecting a DEK for non-secure memory storage.
SEC block protects data in a data structure called
a Secret Key Blob, which provides both confidentiality
and integrity protection.
Every time the blob encapsulation is executed,
a AES-256 key is randomly generated to encrypt the DEK.
This key is encrypted with the OTP Secret key
from SoC. The resulting blob consists of the encrypted
AES-256 key, the encrypted DEK, and a 16-bit MAC.
During decapsulation, the reverse process is performed
to get back the original DEK. A caveat to the blob
decapsulation process, is that the DEK is decrypted
in secure-memory and can only be read by FSL SEC HW.
The DEK is used to decrypt data during encrypted boot.
Commands added
--------------
dek_blob - encapsulating DEK as a cryptgraphic blob
Commands Syntax
---------------
dek_blob src dst len
Encapsulate and create blob of a len-bits DEK at
address src and store the result at address dst.
Signed-off-by: Raul Cardenas <Ulises.Cardenas@freescale.com>
Signed-off-by: Nitin Garg <nitin.garg@freescale.com>
Signed-off-by: Ulises Cardenas <ulises.cardenas@freescale.com>
Signed-off-by: Ulises Cardenas-B45798 <Ulises.Cardenas@freescale.com>
diff --git a/drivers/crypto/fsl/Makefile b/drivers/crypto/fsl/Makefile
index c0cf642..4aa91e4 100644
--- a/drivers/crypto/fsl/Makefile
+++ b/drivers/crypto/fsl/Makefile
@@ -8,5 +8,5 @@
obj-y += sec.o
obj-$(CONFIG_FSL_CAAM) += jr.o fsl_hash.o jobdesc.o error.o
-obj-$(CONFIG_CMD_BLOB) += fsl_blob.o
+obj-$(CONFIG_CMD_BLOB)$(CONFIG_CMD_DEKBLOB) += fsl_blob.o
obj-$(CONFIG_RSA_FREESCALE_EXP) += fsl_rsa.o
diff --git a/drivers/crypto/fsl/desc.h b/drivers/crypto/fsl/desc.h
index 504f2b0..18e2ec8 100644
--- a/drivers/crypto/fsl/desc.h
+++ b/drivers/crypto/fsl/desc.h
@@ -12,11 +12,18 @@
#ifndef DESC_H
#define DESC_H
+#define KEY_BLOB_SIZE 32
+#define MAC_SIZE 16
+
/* Max size of any CAAM descriptor in 32-bit words, inclusive of header */
#define MAX_CAAM_DESCSIZE 64
+/* Size of DEK Blob descriptor, inclusive of header */
+#define DEK_BLOB_DESCSIZE 9
+
/* Block size of any entity covered/uncovered with a KEK/TKEK */
#define KEK_BLOCKSIZE 16
+
/*
* Supported descriptor command types as they show up
* inside a descriptor command word.
@@ -273,6 +280,13 @@
#define LDLEN_SET_OFIFO_OFFSET_MASK (3 << LDLEN_SET_OFIFO_OFFSET_SHIFT)
/*
+ * AAD Definitions
+ */
+#define AES_KEY_SHIFT 8
+#define LD_CCM_MODE 0x66
+#define KEY_AES_SRC (0x55 << AES_KEY_SHIFT)
+
+/*
* FIFO_LOAD/FIFO_STORE/SEQ_FIFO_LOAD/SEQ_FIFO_STORE
* Command Constructs
*/
@@ -418,6 +432,7 @@
#define OP_PCLID_MASK (0xff << 16)
/* Assuming OP_TYPE = OP_TYPE_UNI_PROTOCOL */
+#define OP_PCLID_SECMEM 0x08
#define OP_PCLID_BLOB (0x0d << OP_PCLID_SHIFT)
#define OP_PCLID_SECRETKEY (0x11 << OP_PCLID_SHIFT)
#define OP_PCLID_PUBLICKEYPAIR (0x14 << OP_PCLID_SHIFT)
diff --git a/drivers/crypto/fsl/fsl_blob.c b/drivers/crypto/fsl/fsl_blob.c
index 9923bcb..8b25921 100644
--- a/drivers/crypto/fsl/fsl_blob.c
+++ b/drivers/crypto/fsl/fsl_blob.c
@@ -7,6 +7,8 @@
#include <common.h>
#include <malloc.h>
+#include <fsl_sec.h>
+#include <asm-generic/errno.h>
#include "jobdesc.h"
#include "desc.h"
#include "jr.h"
@@ -59,3 +61,53 @@
free(desc);
return ret;
}
+
+#ifdef CONFIG_CMD_DEKBLOB
+int blob_dek(const u8 *src, u8 *dst, u8 len)
+{
+ int ret, size, i = 0;
+ u32 *desc;
+
+ int out_sz = WRP_HDR_SIZE + len + KEY_BLOB_SIZE + MAC_SIZE;
+
+ puts("\nEncapsulating provided DEK to form blob\n");
+ desc = memalign(ARCH_DMA_MINALIGN,
+ sizeof(uint32_t) * DEK_BLOB_DESCSIZE);
+ if (!desc) {
+ debug("Not enough memory for descriptor allocation\n");
+ return -ENOMEM;
+ }
+
+ ret = inline_cnstr_jobdesc_blob_dek(desc, src, dst, len);
+ if (ret) {
+ debug("Error in Job Descriptor Construction: %d\n", ret);
+ } else {
+ size = roundup(sizeof(uint32_t) * DEK_BLOB_DESCSIZE,
+ ARCH_DMA_MINALIGN);
+ flush_dcache_range((unsigned long)desc,
+ (unsigned long)desc + size);
+ size = roundup(sizeof(uint8_t) * out_sz, ARCH_DMA_MINALIGN);
+ flush_dcache_range((unsigned long)dst,
+ (unsigned long)dst + size);
+
+ ret = run_descriptor_jr(desc);
+ }
+
+ if (ret) {
+ debug("Error in Encapsulation %d\n", ret);
+ goto err;
+ }
+
+ size = roundup(out_sz, ARCH_DMA_MINALIGN);
+ invalidate_dcache_range((unsigned long)dst, (unsigned long)dst+size);
+
+ puts("DEK Blob\n");
+ for (i = 0; i < out_sz; i++)
+ printf("%02X", ((uint8_t *)dst)[i]);
+ printf("\n");
+
+err:
+ free(desc);
+ return ret;
+}
+#endif
diff --git a/drivers/crypto/fsl/jobdesc.c b/drivers/crypto/fsl/jobdesc.c
index cc0dced..5695bef 100644
--- a/drivers/crypto/fsl/jobdesc.c
+++ b/drivers/crypto/fsl/jobdesc.c
@@ -9,12 +9,157 @@
*/
#include <common.h>
+#include <fsl_sec.h>
#include "desc_constr.h"
#include "jobdesc.h"
#include "rsa_caam.h"
-#define KEY_BLOB_SIZE 32
-#define MAC_SIZE 16
+#ifdef CONFIG_MX6
+/*!
+ * Secure memory run command
+ *
+ * @param sec_mem_cmd Secure memory command register
+ * @return cmd_status Secure memory command status register
+ */
+uint32_t secmem_set_cmd(uint32_t sec_mem_cmd)
+{
+ uint32_t temp_reg;
+
+ sec_out32(CAAM_SMCJR0, sec_mem_cmd);
+
+ do {
+ temp_reg = sec_in32(CAAM_SMCSJR0);
+ } while (temp_reg & CMD_COMPLETE);
+
+ return temp_reg;
+}
+
+/*!
+ * CAAM page allocation:
+ * Allocates a partition from secure memory, with the id
+ * equal to partion_num. This will de-allocate the page
+ * if it is already allocated. The partition will have
+ * full access permissions. The permissions are set before,
+ * running a job descriptor. A memory page of secure RAM
+ * is allocated for the partition.
+ *
+ * @param page Number of the page to allocate.
+ * @param partition Number of the partition to allocate.
+ * @return 0 on success, ERROR_IN_PAGE_ALLOC otherwise
+ */
+int caam_page_alloc(uint8_t page_num, uint8_t partition_num)
+{
+ uint32_t temp_reg;
+
+ /*
+ * De-Allocate partition_num if already allocated to ARM core
+ */
+ if (sec_in32(CAAM_SMPO_0) & PARTITION_OWNER(partition_num)) {
+ temp_reg = secmem_set_cmd(PARTITION(partition_num) |
+ CMD_PART_DEALLOC);
+ if (temp_reg & SMCSJR_AERR) {
+ printf("Error: De-allocation status 0x%X\n", temp_reg);
+ return ERROR_IN_PAGE_ALLOC;
+ }
+ }
+
+ /* set the access rights to allow full access */
+ sec_out32(CAAM_SMAG1JR0(partition_num), 0xF);
+ sec_out32(CAAM_SMAG2JR0(partition_num), 0xF);
+ sec_out32(CAAM_SMAPJR0(partition_num), 0xFF);
+
+ /* Now need to allocate partition_num of secure RAM. */
+ /* De-Allocate page_num by starting with a page inquiry command */
+ temp_reg = secmem_set_cmd(PAGE(page_num) | CMD_INQUIRY);
+
+ /* if the page is owned, de-allocate it */
+ if ((temp_reg & SMCSJR_PO) == PAGE_OWNED) {
+ temp_reg = secmem_set_cmd(PAGE(page_num) | CMD_PAGE_DEALLOC);
+ if (temp_reg & SMCSJR_AERR) {
+ printf("Error: Allocation status 0x%X\n", temp_reg);
+ return ERROR_IN_PAGE_ALLOC;
+ }
+ }
+
+ /* Allocate page_num to partition_num */
+ temp_reg = secmem_set_cmd(PAGE(page_num) | PARTITION(partition_num)
+ | CMD_PAGE_ALLOC);
+ if (temp_reg & SMCSJR_AERR) {
+ printf("Error: Allocation status 0x%X\n", temp_reg);
+ return ERROR_IN_PAGE_ALLOC;
+ }
+ /* page inquiry command to ensure that the page was allocated */
+ temp_reg = secmem_set_cmd(PAGE(page_num) | CMD_INQUIRY);
+
+ /* if the page is not owned => problem */
+ if ((temp_reg & SMCSJR_PO) != PAGE_OWNED) {
+ printf("Allocation of page %d in partition %d failed 0x%X\n",
+ temp_reg, page_num, partition_num);
+
+ return ERROR_IN_PAGE_ALLOC;
+ }
+
+ return 0;
+}
+
+int inline_cnstr_jobdesc_blob_dek(uint32_t *desc, const uint8_t *plain_txt,
+ uint8_t *dek_blob, uint32_t in_sz)
+{
+ uint32_t ret = 0;
+ u32 aad_w1, aad_w2;
+ /* 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;
+ /* Setting HDR for blob */
+ uint8_t wrapped_key_hdr[8] = {HDR_TAG, 0x00, WRP_HDR_SIZE + out_sz,
+ HDR_PAR, HAB_MOD, HAB_ALG, in_sz, HAB_FLG};
+
+ /* initialize the blob array */
+ memset(dek_blob, 0, out_sz + 8);
+ /* Copy the header into the DEK blob buffer */
+ memcpy(dek_blob, wrapped_key_hdr, sizeof(wrapped_key_hdr));
+
+ /* allocating secure memory */
+ ret = caam_page_alloc(PAGE_1, PARTITION_1);
+ if (ret)
+ return ret;
+
+ /* Write DEK to secure memory */
+ memcpy((uint32_t *)SEC_MEM_PAGE1, (uint32_t *)plain_txt, in_sz);
+
+ unsigned long start = (unsigned long)SEC_MEM_PAGE1 &
+ ~(ARCH_DMA_MINALIGN - 1);
+ unsigned long end = ALIGN(start + 0x1000, ARCH_DMA_MINALIGN);
+ flush_dcache_range(start, end);
+
+ /* Now configure the access rights of the partition */
+ sec_out32(CAAM_SMAG1JR0(PARTITION_1), KS_G1); /* set group 1 */
+ sec_out32(CAAM_SMAG2JR0(PARTITION_1), 0); /* clear group 2 */
+ sec_out32(CAAM_SMAPJR0(PARTITION_1), PERM); /* set perm & locks */
+
+ /* construct aad for AES */
+ aad_w1 = (in_sz << OP_ALG_ALGSEL_SHIFT) | KEY_AES_SRC | LD_CCM_MODE;
+ aad_w2 = 0x0;
+
+ init_job_desc(desc, 0);
+
+ append_cmd(desc, CMD_LOAD | CLASS_2 | KEY_IMM | KEY_ENC |
+ (0x0c << LDST_OFFSET_SHIFT) | 0x08);
+
+ append_u32(desc, aad_w1);
+
+ append_u32(desc, aad_w2);
+
+ append_cmd_ptr(desc, (dma_addr_t)SEC_MEM_PAGE1, in_sz, CMD_SEQ_IN_PTR);
+
+ append_cmd_ptr(desc, (dma_addr_t)dek_blob + 8, out_sz, CMD_SEQ_OUT_PTR);
+
+ append_operation(desc, OP_TYPE_ENCAP_PROTOCOL | OP_PCLID_BLOB |
+ OP_PCLID_SECMEM);
+
+ return ret;
+}
+#endif
void inline_cnstr_jobdesc_hash(uint32_t *desc,
const uint8_t *msg, uint32_t msgsz, uint8_t *digest,
diff --git a/drivers/crypto/fsl/jobdesc.h b/drivers/crypto/fsl/jobdesc.h
index 84b3edd..112404c 100644
--- a/drivers/crypto/fsl/jobdesc.h
+++ b/drivers/crypto/fsl/jobdesc.h
@@ -14,6 +14,20 @@
#define KEY_IDNFR_SZ_BYTES 16
+#ifdef CONFIG_CMD_DEKBLOB
+/* inline_cnstr_jobdesc_blob_dek:
+ * Intializes and constructs the job descriptor for DEK encapsulation
+ * using the given parameters.
+ * @desc: reference to the job descriptor
+ * @plain_txt: reference to the DEK
+ * @enc_blob: reference where to store the blob
+ * @in_sz: size in bytes of the DEK
+ * @return: 0 on success, ECONSTRJDESC otherwise
+ */
+int inline_cnstr_jobdesc_blob_dek(uint32_t *desc, const uint8_t *plain_txt,
+ uint8_t *enc_blob, uint32_t in_sz);
+#endif
+
void inline_cnstr_jobdesc_hash(uint32_t *desc,
const uint8_t *msg, uint32_t msgsz, uint8_t *digest,
u32 alg_type, uint32_t alg_size, int sg_tbl);
diff --git a/drivers/crypto/fsl/jr.c b/drivers/crypto/fsl/jr.c
index f9d4938..f99d594 100644
--- a/drivers/crypto/fsl/jr.c
+++ b/drivers/crypto/fsl/jr.c
@@ -90,11 +90,13 @@
jr.liodn = DEFAULT_JR_LIODN;
#endif
jr.size = JR_SIZE;
- jr.input_ring = (dma_addr_t *)malloc(JR_SIZE * sizeof(dma_addr_t));
+ jr.input_ring = (dma_addr_t *)memalign(ARCH_DMA_MINALIGN,
+ JR_SIZE * sizeof(dma_addr_t));
if (!jr.input_ring)
return -1;
jr.output_ring =
- (struct op_ring *)malloc(JR_SIZE * sizeof(struct op_ring));
+ (struct op_ring *)memalign(ARCH_DMA_MINALIGN,
+ JR_SIZE * sizeof(struct op_ring));
if (!jr.output_ring)
return -1;
@@ -163,13 +165,23 @@
CIRC_SPACE(jr.head, jr.tail, jr.size) <= 0)
return -1;
- jr.input_ring[head] = desc_phys_addr;
jr.info[head].desc_phys_addr = desc_phys_addr;
jr.info[head].desc_addr = (uint32_t)desc_addr;
jr.info[head].callback = (void *)callback;
jr.info[head].arg = arg;
jr.info[head].op_done = 0;
+ unsigned long start = (unsigned long)&jr.info[head] &
+ ~(ARCH_DMA_MINALIGN - 1);
+ unsigned long end = ALIGN(start + sizeof(struct jr_info),
+ ARCH_DMA_MINALIGN);
+ flush_dcache_range(start, end);
+
+ jr.input_ring[head] = desc_phys_addr;
+ start = (unsigned long)&jr.input_ring[head] & ~(ARCH_DMA_MINALIGN - 1);
+ end = ALIGN(start + sizeof(dma_addr_t), ARCH_DMA_MINALIGN);
+ flush_dcache_range(start, end);
+
jr.head = (head + 1) & (jr.size - 1);
sec_out32(®s->irja, 1);
@@ -187,6 +199,13 @@
void *arg = NULL;
while (sec_in32(®s->orsf) && CIRC_CNT(jr.head, jr.tail, jr.size)) {
+ unsigned long start = (unsigned long)jr.output_ring &
+ ~(ARCH_DMA_MINALIGN - 1);
+ unsigned long end = ALIGN(start +
+ sizeof(struct op_ring)*JR_SIZE,
+ ARCH_DMA_MINALIGN);
+ invalidate_dcache_range(start, end);
+
found = 0;
dma_addr_t op_desc = jr.output_ring[jr.tail].desc;
@@ -333,13 +352,17 @@
memset(&op, 0, sizeof(struct result));
- desc = malloc(sizeof(int) * 6);
+ desc = memalign(ARCH_DMA_MINALIGN, sizeof(uint32_t) * 6);
if (!desc) {
printf("cannot allocate RNG init descriptor memory\n");
return -1;
}
inline_cnstr_jobdesc_rng_instantiation(desc);
+ int size = roundup(sizeof(uint32_t) * 6, ARCH_DMA_MINALIGN);
+ flush_dcache_range((unsigned long)desc,
+ (unsigned long)desc + size);
+
ret = run_descriptor_jr(desc);
if (ret)