1460408efSSimon Glass /* 2460408efSSimon Glass * Copyright (c) 2012 The Chromium OS Authors. 3460408efSSimon Glass * See file CREDITS for list of people who contributed to this 4460408efSSimon Glass * project. 5460408efSSimon Glass * 6460408efSSimon Glass * This program is free software; you can redistribute it and/or 7460408efSSimon Glass * modify it under the terms of the GNU General Public License as 8460408efSSimon Glass * published by the Free Software Foundation; either version 2 of 9460408efSSimon Glass * the License, or (at your option) any later version. 10460408efSSimon Glass * 11460408efSSimon Glass * This program is distributed in the hope that it will be useful, 12460408efSSimon Glass * but WITHOUT ANY WARRANTY; without even the implied warranty of 13460408efSSimon Glass * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14460408efSSimon Glass * GNU General Public License for more details. 15460408efSSimon Glass * 16460408efSSimon Glass * You should have received a copy of the GNU General Public License 17460408efSSimon Glass * along with this program; if not, write to the Free Software 18460408efSSimon Glass * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 19460408efSSimon Glass * MA 02111-1307 USA 20460408efSSimon Glass */ 21460408efSSimon Glass 22460408efSSimon Glass #ifndef _HASH_H 23460408efSSimon Glass #define _HASH_H 24460408efSSimon Glass 25d20a40deSSimon Glass #if defined(CONFIG_SHA1SUM_VERIFY) || defined(CONFIG_CRC32_VERIFY) 26460408efSSimon Glass #define CONFIG_HASH_VERIFY 27460408efSSimon Glass #endif 28460408efSSimon Glass 29460408efSSimon Glass struct hash_algo { 30460408efSSimon Glass const char *name; /* Name of algorithm */ 31460408efSSimon Glass int digest_size; /* Length of digest */ 32460408efSSimon Glass /** 33460408efSSimon Glass * hash_func_ws: Generic hashing function 34460408efSSimon Glass * 35460408efSSimon Glass * This is the generic prototype for a hashing function. We only 36460408efSSimon Glass * have the watchdog version at present. 37460408efSSimon Glass * 38460408efSSimon Glass * @input: Input buffer 39460408efSSimon Glass * @ilen: Input buffer length 40460408efSSimon Glass * @output: Checksum result (length depends on algorithm) 41460408efSSimon Glass * @chunk_sz: Trigger watchdog after processing this many bytes 42460408efSSimon Glass */ 43460408efSSimon Glass void (*hash_func_ws)(const unsigned char *input, unsigned int ilen, 44460408efSSimon Glass unsigned char *output, unsigned int chunk_sz); 45460408efSSimon Glass int chunk_size; /* Watchdog chunk size */ 46460408efSSimon Glass }; 47460408efSSimon Glass 48460408efSSimon Glass /* 49460408efSSimon Glass * Maximum digest size for all algorithms we support. Having this value 50460408efSSimon Glass * avoids a malloc() or C99 local declaration in common/cmd_hash.c. 51460408efSSimon Glass */ 52460408efSSimon Glass #define HASH_MAX_DIGEST_SIZE 32 53460408efSSimon Glass 54d5b76673SSimon Glass enum { 55d5b76673SSimon Glass HASH_FLAG_VERIFY = 1 << 0, /* Enable verify mode */ 56d5b76673SSimon Glass HASH_FLAG_ENV = 1 << 1, /* Allow env vars */ 57d5b76673SSimon Glass }; 58d5b76673SSimon Glass 59460408efSSimon Glass /** 60460408efSSimon Glass * hash_command: Process a hash command for a particular algorithm 61460408efSSimon Glass * 62460408efSSimon Glass * This common function is used to implement specific hash commands. 63460408efSSimon Glass * 64*218da0f3SSimon Glass * @algo_name: Hash algorithm being used (lower case!) 65d5b76673SSimon Glass * @flags: Flags value (HASH_FLAG_...) 66460408efSSimon Glass * @cmdtp: Pointer to command table entry 67460408efSSimon Glass * @flag: Some flags normally 0 (see CMD_FLAG_.. above) 68460408efSSimon Glass * @argc: Number of arguments (arg 0 must be the command text) 69460408efSSimon Glass * @argv: Arguments 70460408efSSimon Glass */ 71d5b76673SSimon Glass int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag, 72460408efSSimon Glass int argc, char * const argv[]); 73460408efSSimon Glass 74460408efSSimon Glass #endif 75