1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2014 Freescale Semiconductor, Inc.
4 * Author: Ruchika Gupta <ruchika.gupta@freescale.com>
5 */
6
7 #include <config.h>
8 #include <common.h>
9 #include <dm.h>
10 #include <asm/types.h>
11 #include <malloc.h>
12 #include "jobdesc.h"
13 #include "desc.h"
14 #include "jr.h"
15 #include "rsa_caam.h"
16 #include <u-boot/rsa-mod-exp.h>
17
fsl_mod_exp(struct udevice * dev,const uint8_t * sig,uint32_t sig_len,struct key_prop * prop,uint8_t * out)18 int fsl_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
19 struct key_prop *prop, uint8_t *out)
20 {
21 uint32_t keylen;
22 struct pk_in_params pkin;
23 uint32_t desc[MAX_CAAM_DESCSIZE];
24 int ret;
25
26 /* Length in bytes */
27 keylen = prop->num_bits / 8;
28
29 pkin.a = sig;
30 pkin.a_siz = sig_len;
31 pkin.n = prop->modulus;
32 pkin.n_siz = keylen;
33 pkin.e = prop->public_exponent;
34 pkin.e_siz = prop->exp_len;
35
36 inline_cnstr_jobdesc_pkha_rsaexp(desc, &pkin, out, sig_len);
37
38 ret = run_descriptor_jr(desc);
39 if (ret) {
40 debug("%s: RSA failed to verify: %d\n", __func__, ret);
41 return -EFAULT;
42 }
43
44 return 0;
45 }
46
47 static const struct mod_exp_ops fsl_mod_exp_ops = {
48 .mod_exp = fsl_mod_exp,
49 };
50
51 U_BOOT_DRIVER(fsl_rsa_mod_exp) = {
52 .name = "fsl_rsa_mod_exp",
53 .id = UCLASS_MOD_EXP,
54 .ops = &fsl_mod_exp_ops,
55 .flags = DM_FLAG_PRE_RELOC,
56 };
57
58 U_BOOT_DEVICE(fsl_rsa) = {
59 .name = "fsl_rsa_mod_exp",
60 };
61