1 /* 2 * (C) Copyright 2014 Freescale Semiconductor, Inc. 3 * Author: Ruchika Gupta <ruchika.gupta@freescale.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <config.h> 9 #include <common.h> 10 #include <dm.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 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 .flags = DM_FLAG_PRE_RELOC, 57 }; 58 59 U_BOOT_DEVICE(fsl_rsa) = { 60 .name = "fsl_rsa_mod_exp", 61 }; 62