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Diffstat (limited to '')
| -rw-r--r-- | drivers/nxp/crypto/caam/src/auth/hash.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/nxp/crypto/caam/src/auth/hash.c b/drivers/nxp/crypto/caam/src/auth/hash.c new file mode 100644 index 0000000..1665df1 --- /dev/null +++ b/drivers/nxp/crypto/caam/src/auth/hash.c @@ -0,0 +1,155 @@ +/* + * 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 <arch_helpers.h> +#include "caam.h" +#include <common/debug.h> +#include <drivers/auth/crypto_mod.h> + +#include "hash.h" +#include "jobdesc.h" +#include "sec_hw_specific.h" + +/* Since no Allocator is available . Taking a global static ctx. + * This would mean that only one active ctx can be there at a time. + */ + +static struct hash_ctx glbl_ctx; + +static void hash_done(uint32_t *desc, uint32_t status, void *arg, + void *job_ring) +{ + INFO("Hash Desc SUCCESS with status %x\n", status); +} + +/*************************************************************************** + * Function : hash_init + * Arguments : ctx - SHA context + * Return : init, + * Description : This function initializes the context for SHA calculation + ***************************************************************************/ +int hash_init(enum hash_algo algo, void **ctx) +{ + if (glbl_ctx.active == false) { + memset(&glbl_ctx, 0, sizeof(struct hash_ctx)); + glbl_ctx.active = true; + glbl_ctx.algo = algo; + *ctx = &glbl_ctx; + return 0; + } else { + return -1; + } +} + +/*************************************************************************** + * Function : hash_update + * Arguments : ctx - SHA context + * buffer - Data + * length - Length + * Return : -1 on error + * 0 on SUCCESS + * Description : This function creates SG entry of the data provided + ***************************************************************************/ +int hash_update(enum hash_algo algo, void *context, void *data_ptr, + unsigned int data_len) +{ + struct hash_ctx *ctx = context; + /* MAX_SG would be MAX_SG_ENTRIES + key + hdr + sg table */ + if (ctx->sg_num >= MAX_SG) { + ERROR("Reached limit for calling %s\n", __func__); + ctx->active = false; + return -EINVAL; + + } + + if (ctx->algo != algo) { + ERROR("ctx for algo not correct\n"); + ctx->active = false; + return -EINVAL; + } + +#if defined(SEC_MEM_NON_COHERENT) && defined(IMAGE_BL2) + flush_dcache_range((uintptr_t)data_ptr, data_len); + dmbsy(); +#endif + +#ifdef CONFIG_PHYS_64BIT + sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_hi, + (uint32_t) ((uintptr_t) data_ptr >> 32)); +#else + sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_hi, 0x0); +#endif + sec_out32(&ctx->sg_tbl[ctx->sg_num].addr_lo, (uintptr_t) data_ptr); + + sec_out32(&ctx->sg_tbl[ctx->sg_num].len_flag, + (data_len & SG_ENTRY_LENGTH_MASK)); + + ctx->sg_num++; + + ctx->len += data_len; + + return 0; +} + +/*************************************************************************** + * Function : hash_final + * Arguments : ctx - SHA context + * Return : SUCCESS or FAILURE + * Description : This function sets the final bit and enqueues the decriptor + ***************************************************************************/ +int hash_final(enum hash_algo algo, void *context, void *hash_ptr, + unsigned int hash_len) +{ + int ret = 0; + struct hash_ctx *ctx = context; + uint32_t final = 0U; + + struct job_descriptor jobdesc __aligned(CACHE_WRITEBACK_GRANULE); + + jobdesc.arg = NULL; + jobdesc.callback = hash_done; + + if (ctx->algo != algo) { + ERROR("ctx for algo not correct\n"); + ctx->active = false; + return -EINVAL; + } + + final = sec_in32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag) | + SG_ENTRY_FINAL_BIT; + sec_out32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag, final); + + dsb(); + + /* create the hw_rng descriptor */ + cnstr_hash_jobdesc(jobdesc.desc, (uint8_t *) ctx->sg_tbl, + ctx->len, hash_ptr); + +#if defined(SEC_MEM_NON_COHERENT) && defined(IMAGE_BL2) + flush_dcache_range((uintptr_t)ctx->sg_tbl, + (sizeof(struct sg_entry) * MAX_SG)); + inv_dcache_range((uintptr_t)hash_ptr, hash_len); + + dmbsy(); +#endif + + /* Finally, generate the requested random data bytes */ + ret = run_descriptor_jr(&jobdesc); + if (ret != 0) { + ERROR("Error in running descriptor\n"); + ret = -1; + } + ctx->active = false; + return ret; +} |