fsl_blob.c
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/*
* Copyright 2014 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*
*/
#include <common.h>
#include <malloc.h>
#include <memalign.h>
#include <fsl_sec.h>
#include <linux/errno.h>
#include "jobdesc.h"
#include "desc.h"
#include "jr.h"
/**
* blob_decap() - Decapsulate the data from a blob
* @key_mod: - Key modifier address
* @src: - Source address (blob)
* @dst: - Destination address (data)
* @len: - Size of decapsulated data
*
* Note: Start and end of the key_mod, src and dst buffers have to be aligned to
* the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
*
* Returns zero on success, negative on error.
*/
int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
{
int ret, size, i = 0;
u32 *desc;
if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
!IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
!IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
puts("Error: blob_decap: Address arguments are not aligned!\n");
return -EINVAL;
}
printf("\nDecapsulating blob to get data\n");
desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
if (!desc) {
debug("Not enough memory for descriptor allocation\n");
return -ENOMEM;
}
size = ALIGN(16, ARCH_DMA_MINALIGN);
flush_dcache_range((unsigned long)key_mod,
(unsigned long)key_mod + size);
size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
flush_dcache_range((unsigned long)src,
(unsigned long)src + size);
inline_cnstr_jobdesc_blob_decap(desc, key_mod, src, dst, len);
debug("Descriptor dump:\n");
for (i = 0; i < 14; i++)
debug("Word[%d]: %08x\n", i, *(desc + i));
size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
flush_dcache_range((unsigned long)desc,
(unsigned long)desc + size);
flush_dcache_range((unsigned long)dst,
(unsigned long)dst + size);
ret = run_descriptor_jr(desc);
if (ret) {
printf("Error in blob decapsulation: %d\n", ret);
} else {
size = ALIGN(len, ARCH_DMA_MINALIGN);
invalidate_dcache_range((unsigned long)dst,
(unsigned long)dst + size);
puts("Blob decapsulation successful.\n");
}
free(desc);
return ret;
}
/**
* blob_encap() - Encapsulate the data as a blob
* @key_mod: - Key modifier address
* @src: - Source address (data)
* @dst: - Destination address (blob)
* @len: - Size of data to be encapsulated
*
* Note: Start and end of the key_mod, src and dst buffers have to be aligned to
* the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
*
* Returns zero on success, negative on error.
*/
int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
{
int ret, size, i = 0;
u32 *desc;
if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
!IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
!IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
puts("Error: blob_encap: Address arguments are not aligned!\n");
return -EINVAL;
}
printf("\nEncapsulating data to form blob\n");
desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
if (!desc) {
debug("Not enough memory for descriptor allocation\n");
return -ENOMEM;
}
size = ALIGN(16, ARCH_DMA_MINALIGN);
flush_dcache_range((unsigned long)key_mod,
(unsigned long)key_mod + size);
size = ALIGN(len, ARCH_DMA_MINALIGN);
flush_dcache_range((unsigned long)src,
(unsigned long)src + size);
inline_cnstr_jobdesc_blob_encap(desc, key_mod, src, dst, len);
debug("Descriptor dump:\n");
for (i = 0; i < 14; i++)
debug("Word[%d]: %08x\n", i, *(desc + i));
size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
flush_dcache_range((unsigned long)desc,
(unsigned long)desc + size);
flush_dcache_range((unsigned long)dst,
(unsigned long)dst + size);
ret = run_descriptor_jr(desc);
if (ret) {
printf("Error in blob encapsulation: %d\n", ret);
} else {
size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
invalidate_dcache_range((unsigned long)dst,
(unsigned long)dst + size);
puts("Blob encapsulation successful.\n");
}
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