mirror of
https://github.com/AsahiLinux/u-boot
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eda25c11b8
issue:
CAAM fails with key error when perform Modular Exponentiation
using PKHA Block in CAAM
Fix:
add flush and invalidate dcache for keys, signature
and output decrypted data processed by CAAM.
Fixes: 34276478f7 (DM: crypto/fsl - Add Freescale rsa DM driver)
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Gaurav Jain <gaurav.jain@nxp.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2014 Freescale Semiconductor, Inc.
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* Author: Ruchika Gupta <ruchika.gupta@freescale.com>
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*/
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#include <config.h>
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#include <common.h>
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#include <cpu_func.h>
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#include <dm.h>
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#include <log.h>
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#include <asm/types.h>
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#include <malloc.h>
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#include "jobdesc.h"
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#include "desc.h"
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#include "jr.h"
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#include "rsa_caam.h"
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#include <u-boot/rsa-mod-exp.h>
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int fsl_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
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struct key_prop *prop, uint8_t *out)
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{
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uint32_t keylen;
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struct pk_in_params pkin;
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uint32_t desc[MAX_CAAM_DESCSIZE];
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int ret;
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/* Length in bytes */
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keylen = prop->num_bits / 8;
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pkin.a = sig;
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pkin.a_siz = sig_len;
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pkin.n = prop->modulus;
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pkin.n_siz = keylen;
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pkin.e = prop->public_exponent;
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pkin.e_siz = prop->exp_len;
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inline_cnstr_jobdesc_pkha_rsaexp(desc, &pkin, out, sig_len);
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flush_dcache_range((ulong)sig, (ulong)sig + sig_len);
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flush_dcache_range((ulong)prop->modulus, (ulong)(prop->modulus) + keylen);
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flush_dcache_range((ulong)prop->public_exponent,
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(ulong)(prop->public_exponent) + prop->exp_len);
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flush_dcache_range((ulong)desc, (ulong)desc + (sizeof(uint32_t) * MAX_CAAM_DESCSIZE));
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flush_dcache_range((ulong)out, (ulong)out + sig_len);
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ret = run_descriptor_jr(desc);
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if (ret) {
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debug("%s: RSA failed to verify: %d\n", __func__, ret);
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return -EFAULT;
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}
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invalidate_dcache_range((ulong)out, (ulong)out + sig_len);
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return 0;
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}
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static const struct mod_exp_ops fsl_mod_exp_ops = {
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.mod_exp = fsl_mod_exp,
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};
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U_BOOT_DRIVER(fsl_rsa_mod_exp) = {
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.name = "fsl_rsa_mod_exp",
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.id = UCLASS_MOD_EXP,
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.ops = &fsl_mod_exp_ops,
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};
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U_BOOT_DRVINFO(fsl_rsa) = {
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.name = "fsl_rsa_mod_exp",
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};
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