| /* Copyright (c) 2014 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef __CROS_EC_RSA_H |
| #define __CROS_EC_RSA_H |
| |
| #include "config.h" |
| |
| #ifndef CONFIG_RSA_KEY_SIZE |
| #define CONFIG_RSA_KEY_SIZE 2048 /* default to 2048-bit key length */ |
| #endif |
| |
| #define RSANUMBYTES ((CONFIG_RSA_KEY_SIZE) / 8) |
| #define RSANUMWORDS (RSANUMBYTES / sizeof(uint32_t)) |
| |
| #ifdef CONFIG_RSA /* reserve space for public key only if used */ |
| /* |
| * The size of the public key structure is |
| * 2 x RSANUMBYTES for n and rr fields |
| * plus 4 for n0inv, aligned on a multiple of 16 |
| * Put numerical constants here to please the linker script. |
| */ |
| #ifndef CONFIG_RWSIG_TYPE_RWSIG |
| /* vboot2 public keys are packed in a slightly different way. */ |
| #if CONFIG_RSA_KEY_SIZE == 2048 |
| #define RSA_PUBLIC_KEY_SIZE 528 |
| #elif CONFIG_RSA_KEY_SIZE == 4096 |
| #define RSA_PUBLIC_KEY_SIZE 1040 |
| #elif CONFIG_RSA_KEY_SIZE == 8192 |
| #define RSA_PUBLIC_KEY_SIZE 2064 |
| #else |
| #error Unsupported RSA key size |
| #endif |
| #endif /* ! CONFIG_RWSIG_TYPE_RWSIG */ |
| #endif /* CONFIG_RSA */ |
| |
| #ifndef __ASSEMBLER__ |
| |
| #include "common.h" |
| #include "util.h" |
| |
| #ifdef CONFIG_RWSIG_TYPE_RWSIG |
| /* RSA public key definition, VBoot2 packing */ |
| struct rsa_public_key { |
| uint32_t size; |
| uint32_t n0inv; /* -1 / n[0] mod 2^32 */ |
| uint32_t n[RSANUMWORDS]; /* modulus as little endian array */ |
| uint32_t rr[RSANUMWORDS]; /* R^2 as little endian array */ |
| }; |
| #else |
| /* RSA public key definition */ |
| struct rsa_public_key { |
| uint32_t n[RSANUMWORDS]; /* modulus as little endian array */ |
| uint32_t rr[RSANUMWORDS]; /* R^2 as little endian array */ |
| uint32_t n0inv; /* -1 / n[0] mod 2^32 */ |
| }; |
| #endif |
| |
| int rsa_verify(const struct rsa_public_key *key, |
| const uint8_t *signature, |
| const uint8_t *sha, |
| uint32_t *workbuf32); |
| |
| #endif /* !__ASSEMBLER__ */ |
| |
| #endif /* __CROS_EC_RSA_H */ |