| Simon Glass | 460408e | 2012-12-05 14:46:36 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2012 The Chromium OS Authors. |
| 3 | * See file CREDITS for list of people who contributed to this |
| 4 | * project. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
| 8 | * published by the Free Software Foundation; either version 2 of |
| 9 | * the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 19 | * MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | #ifndef _HASH_H |
| 23 | #define _HASH_H |
| 24 | |
| 25 | #ifdef CONFIG_SHA1SUM_VERIFY |
| 26 | #define CONFIG_HASH_VERIFY |
| 27 | #endif |
| 28 | |
| 29 | struct hash_algo { |
| 30 | const char *name; /* Name of algorithm */ |
| 31 | int digest_size; /* Length of digest */ |
| 32 | /** |
| 33 | * hash_func_ws: Generic hashing function |
| 34 | * |
| 35 | * This is the generic prototype for a hashing function. We only |
| 36 | * have the watchdog version at present. |
| 37 | * |
| 38 | * @input: Input buffer |
| 39 | * @ilen: Input buffer length |
| 40 | * @output: Checksum result (length depends on algorithm) |
| 41 | * @chunk_sz: Trigger watchdog after processing this many bytes |
| 42 | */ |
| 43 | void (*hash_func_ws)(const unsigned char *input, unsigned int ilen, |
| 44 | unsigned char *output, unsigned int chunk_sz); |
| 45 | int chunk_size; /* Watchdog chunk size */ |
| 46 | }; |
| 47 | |
| 48 | /* |
| 49 | * Maximum digest size for all algorithms we support. Having this value |
| 50 | * avoids a malloc() or C99 local declaration in common/cmd_hash.c. |
| 51 | */ |
| 52 | #define HASH_MAX_DIGEST_SIZE 32 |
| 53 | |
| 54 | /** |
| 55 | * hash_command: Process a hash command for a particular algorithm |
| 56 | * |
| 57 | * This common function is used to implement specific hash commands. |
| 58 | * |
| 59 | * @algo_name: Hash algorithm being used |
| 60 | * @verify: Non-zero to enable verify mode |
| 61 | * @cmdtp: Pointer to command table entry |
| 62 | * @flag: Some flags normally 0 (see CMD_FLAG_.. above) |
| 63 | * @argc: Number of arguments (arg 0 must be the command text) |
| 64 | * @argv: Arguments |
| 65 | */ |
| 66 | int hash_command(const char *algo_name, int verify, cmd_tbl_t *cmdtp, int flag, |
| 67 | int argc, char * const argv[]); |
| 68 | |
| 69 | #endif |