X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Fhash.h;h=dc21678045e8df71eb30fbb01d72a28c8c92e17e;hb=54c5d08a09e631f88738db54c75395c6457c2157;hp=c402067af8a755156e5ffa9430ea236a0d3a008a;hpb=6f907b422e8f33a388ce66479da9f42c998dd656;p=oweals%2Fu-boot.git

diff --git a/include/hash.h b/include/hash.h
index c402067af8..dc21678045 100644
--- a/include/hash.h
+++ b/include/hash.h
@@ -1,22 +1,6 @@
 /*
  * Copyright (c) 2012 The Chromium OS Authors.
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _HASH_H
@@ -43,6 +27,42 @@ struct hash_algo {
 	void (*hash_func_ws)(const unsigned char *input, unsigned int ilen,
 		unsigned char *output, unsigned int chunk_sz);
 	int chunk_size;				/* Watchdog chunk size */
+	/*
+	 * hash_init: Create the context for progressive hashing
+	 *
+	 * @algo: Pointer to the hash_algo struct
+	 * @ctxp: Pointer to the pointer of the context for hashing
+	 * @return 0 if ok, -1 on error
+	 */
+	int (*hash_init)(struct hash_algo *algo, void **ctxp);
+	/*
+	 * hash_update: Perform hashing on the given buffer
+	 *
+	 * The context is freed by this function if an error occurs.
+	 *
+	 * @algo: Pointer to the hash_algo struct
+	 * @ctx: Pointer to the context for hashing
+	 * @buf: Pointer to the buffer being hashed
+	 * @size: Size of the buffer being hashed
+	 * @is_last: 1 if this is the last update; 0 otherwise
+	 * @return 0 if ok, -1 on error
+	 */
+	int (*hash_update)(struct hash_algo *algo, void *ctx, const void *buf,
+			   unsigned int size, int is_last);
+	/*
+	 * hash_finish: Write the hash result to the given buffer
+	 *
+	 * The context is freed by this function.
+	 *
+	 * @algo: Pointer to the hash_algo struct
+	 * @ctx: Pointer to the context for hashing
+	 * @dest_buf: Pointer to the buffer for the result
+	 * @size: Size of the buffer for the result
+	 * @return 0 if ok, -ENOSPC if size of the result buffer is too small
+	 *   or -1 on other errors
+	 */
+	int (*hash_finish)(struct hash_algo *algo, void *ctx, void *dest_buf,
+			   int size);
 };
 
 /*
@@ -93,4 +113,16 @@ int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
 int hash_block(const char *algo_name, const void *data, unsigned int len,
 	       uint8_t *output, int *output_size);
 
+/**
+ * hash_lookup_algo() - Look up the hash_algo struct for an algorithm
+ *
+ * The function returns the pointer to the struct or -EPROTONOSUPPORT if the
+ * algorithm is not available.
+ *
+ * @algo_name: Hash algorithm to look up
+ * @algop: Pointer to the hash_algo struct if found
+ *
+ * @return 0 if ok, -EPROTONOSUPPORT for an unknown algorithm.
+ */
+int hash_lookup_algo(const char *algo_name, struct hash_algo **algop);
 #endif