| Simon Glass | 19c402a | 2013-06-13 15:10:02 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013, Google Inc. |
| 3 | * |
| 4 | * (C) Copyright 2008 Semihalf |
| 5 | * |
| 6 | * (C) Copyright 2000-2006 |
| 7 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 8 | * |
| Wolfgang Denk | 1a45966 | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 9 | * SPDX-License-Identifier: GPL-2.0+ |
| Simon Glass | 19c402a | 2013-06-13 15:10:02 -0700 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #ifndef _RSA_H |
| 13 | #define _RSA_H |
| 14 | |
| 15 | #include <errno.h> |
| 16 | #include <image.h> |
| 17 | |
| 18 | #if IMAGE_ENABLE_SIGN |
| 19 | /** |
| 20 | * sign() - calculate and return signature for given input data |
| 21 | * |
| 22 | * @info: Specifies key and FIT information |
| 23 | * @data: Pointer to the input data |
| 24 | * @data_len: Data length |
| 25 | * @sigp: Set to an allocated buffer holding the signature |
| 26 | * @sig_len: Set to length of the calculated hash |
| 27 | * |
| 28 | * This computes input data signature according to selected algorithm. |
| 29 | * Resulting signature value is placed in an allocated buffer, the |
| 30 | * pointer is returned as *sigp. The length of the calculated |
| 31 | * signature is returned via the sig_len pointer argument. The caller |
| 32 | * should free *sigp. |
| 33 | * |
| 34 | * @return: 0, on success, -ve on error |
| 35 | */ |
| 36 | int rsa_sign(struct image_sign_info *info, |
| 37 | const struct image_region region[], |
| 38 | int region_count, uint8_t **sigp, uint *sig_len); |
| 39 | |
| 40 | /** |
| 41 | * add_verify_data() - Add verification information to FDT |
| 42 | * |
| 43 | * Add public key information to the FDT node, suitable for |
| 44 | * verification at run-time. The information added depends on the |
| 45 | * algorithm being used. |
| 46 | * |
| 47 | * @info: Specifies key and FIT information |
| 48 | * @keydest: Destination FDT blob for public key data |
| 49 | * @return: 0, on success, -ve on error |
| 50 | */ |
| 51 | int rsa_add_verify_data(struct image_sign_info *info, void *keydest); |
| 52 | #else |
| 53 | static inline int rsa_sign(struct image_sign_info *info, |
| 54 | const struct image_region region[], int region_count, |
| 55 | uint8_t **sigp, uint *sig_len) |
| 56 | { |
| 57 | return -ENXIO; |
| 58 | } |
| 59 | |
| 60 | static inline int rsa_add_verify_data(struct image_sign_info *info, |
| 61 | void *keydest) |
| 62 | { |
| 63 | return -ENXIO; |
| 64 | } |
| 65 | #endif |
| 66 | |
| 67 | #if IMAGE_ENABLE_VERIFY |
| 68 | /** |
| 69 | * rsa_verify() - Verify a signature against some data |
| 70 | * |
| 71 | * Verify a RSA PKCS1.5 signature against an expected hash. |
| 72 | * |
| 73 | * @info: Specifies key and FIT information |
| 74 | * @data: Pointer to the input data |
| 75 | * @data_len: Data length |
| 76 | * @sig: Signature |
| 77 | * @sig_len: Number of bytes in signature |
| 78 | * @return 0 if verified, -ve on error |
| 79 | */ |
| 80 | int rsa_verify(struct image_sign_info *info, |
| 81 | const struct image_region region[], int region_count, |
| 82 | uint8_t *sig, uint sig_len); |
| 83 | #else |
| 84 | static inline int rsa_verify(struct image_sign_info *info, |
| 85 | const struct image_region region[], int region_count, |
| 86 | uint8_t *sig, uint sig_len) |
| 87 | { |
| 88 | return -ENXIO; |
| 89 | } |
| 90 | #endif |
| 91 | |
| 92 | #endif |