1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2014 Freescale Semiconductor, Inc. 4 * Author: Ruchika Gupta <ruchika.gupta (at) 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 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
