| Nan Zhou | 7a33704 | 2021-07-26 21:05:21 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2021 Google LLC |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | #ifndef PLATFORMS_HAVEN_LIBCR51SIGN_LIBCR51SIGN_SUPPORT_H_ |
| 17 | #define PLATFORMS_HAVEN_LIBCR51SIGN_LIBCR51SIGN_SUPPORT_H_ |
| 18 | |
| 19 | #include "libcr51sign.h" |
| 20 | |
| 21 | #include <openssl/sha.h> |
| 22 | |
| 23 | #ifdef __cplusplus |
| 24 | extern "C" |
| 25 | { |
| 26 | #endif |
| 27 | |
| 28 | struct hash_ctx |
| 29 | { |
| 30 | enum hash_type hash_type; |
| 31 | union |
| 32 | { |
| 33 | SHA256_CTX sha256_ctx; |
| 34 | SHA512_CTX sha512_ctx; |
| 35 | }; |
| 36 | }; |
| 37 | |
| 38 | // @func hash_init get ready to compute a hash |
| 39 | // |
| 40 | // @param[in] ctx - context struct |
| 41 | // @param[in] hash_type - type of hash function to use |
| 42 | // |
| 43 | // @return nonzero on error, zero on success |
| 44 | |
| 45 | int hash_init(const void* ctx, enum hash_type type); |
| 46 | |
| 47 | // @func hash_update add data to the hash |
| 48 | // |
| 49 | // @param[in] ctx - context struct |
| 50 | // @param[in] buf - data to add to hash |
| 51 | // @param[in] count - number of bytes of data to add |
| 52 | // |
| 53 | // @return nonzero on error, zero on success |
| 54 | |
| 55 | int hash_update(void* ctx, const uint8_t* data, size_t size); |
| 56 | |
| 57 | // @func hash_final finish hash calculation |
| 58 | // |
| 59 | // @param[in] ctx - context struct |
| 60 | // @param[out] hash - buffer to write hash to (guaranteed to be big enough) |
| 61 | // |
| 62 | // @return nonzero on error, zero on success |
| 63 | |
| 64 | int hash_final(void* ctx, uint8_t* hash); |
| 65 | |
| 66 | // @func verify check that the signature is valid for given hashed data |
| 67 | // |
| 68 | // @param[in] ctx - context struct |
| 69 | // @param[in] scheme - type of signature, hash, etc. |
| 70 | // @param[in] sig - signature blob |
| 71 | // @param[in] sig_len - length of signature in bytes |
| 72 | // @param[in] data - pre-hashed data to verify |
| 73 | // @param[in] data_len - length of hashed data in bytes |
| 74 | // |
| 75 | // @return nonzero on error, zero on success |
| 76 | |
| 77 | int verify_signature(const void* ctx, enum signature_scheme sig_scheme, |
| 78 | const uint8_t* sig, size_t sig_len, |
| 79 | const uint8_t* data, size_t data_len); |
| 80 | |
| 81 | #ifdef __cplusplus |
| 82 | } // extern "C" |
| 83 | #endif |
| 84 | #endif // PLATFORMS_HAVEN_LIBCR51SIGN_LIBCR51SIGN_SUPPORT_H_ |