59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020-2022 ArtInChip Technology Co.,Ltd
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* Author: Hao Xiong <hao.xiong@artinchip.com>
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*/
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#include <config.h>
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#include <common.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 <u-boot/rsa-mod-exp.h>
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#include <artinchip_crypto.h>
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int aic_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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struct udevice *bus;
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rsa_context_t ctx;
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int ret, out_size;
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ctx.n = (void *)prop->modulus;
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ctx.e = (void *)prop->public_exponent;
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ctx.key_bits = RSA_KEY_BITS_2048;
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ret = crypto_init_device(&bus);
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if (ret)
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return ret;
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ret = rsa_init(bus);
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if (ret)
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return ret;
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ret = rsa_public_decrypt(bus, &ctx, (void *)sig, sig_len, out, &out_size);
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if (ret) {
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pr_err("%s: RSA failed to verify: %d\n", __func__, ret);
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return -EFAULT;
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}
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rsa_exit(bus);
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return 0;
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}
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static const struct mod_exp_ops aic_mod_exp_ops = {
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.mod_exp = aic_mod_exp,
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};
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U_BOOT_DRIVER(aic_rsa_mod_exp) = {
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.name = "aic_rsa_mod_exp",
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.id = UCLASS_MOD_EXP,
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.ops = &aic_mod_exp_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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U_BOOT_DRVINFO(aic_rsa) = {
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.name = "aic_rsa_mod_exp",
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};
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