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 <log.h>
11 #include <asm/types.h>
12 #include <malloc.h>
13 #include "jobdesc.h"
14 #include "desc.h"
15 #include "jr.h"
16 #include "rsa_caam.h"
17 #include <u-boot/rsa-mod-exp.h>
18
fsl_mod_exp(struct udevice * dev,const uint8_t * sig,uint32_t sig_len,struct key_prop * prop,uint8_t * out)19 int fsl_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
20 struct key_prop *prop, uint8_t *out)
21 {
22 uint32_t keylen;
23 struct pk_in_params pkin;
24 uint32_t desc[MAX_CAAM_DESCSIZE];
25 int ret;
26
27 /* Length in bytes */
28 keylen = prop->num_bits / 8;
29
30 pkin.a = sig;
31 pkin.a_siz = sig_len;
32 pkin.n = prop->modulus;
33 pkin.n_siz = keylen;
34 pkin.e = prop->public_exponent;
35 pkin.e_siz = prop->exp_len;
36
37 inline_cnstr_jobdesc_pkha_rsaexp(desc, &pkin, out, sig_len);
38
39 ret = run_descriptor_jr(desc);
40 if (ret) {
41 debug("%s: RSA failed to verify: %d\n", __func__, ret);
42 return -EFAULT;
43 }
44
45 return 0;
46 }
47
48 static const struct mod_exp_ops fsl_mod_exp_ops = {
49 .mod_exp = fsl_mod_exp,
50 };
51
52 U_BOOT_DRIVER(fsl_rsa_mod_exp) = {
53 .name = "fsl_rsa_mod_exp",
54 .id = UCLASS_MOD_EXP,
55 .ops = &fsl_mod_exp_ops,
56 };
57
58 U_BOOT_DRVINFO(fsl_rsa) = {
59 .name = "fsl_rsa_mod_exp",
60 };
61