X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fhash.h;h=8b3f79ec473780104c7a188b85132c30f82b9b1e;hb=c56289ddafce3d1ec442fb18064f136c2c47d0bb;hp=c402067af8a755156e5ffa9430ea236a0d3a008a;hpb=47b8e527448c94d09fc8dbdb6601ea7a605ff955;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/hash.h b/include/hash.h
index c402067..8b3f79e 100644
--- a/include/hash.h
+++ b/include/hash.h
@@ -1,31 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * 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
  */
 
 #ifndef _HASH_H
 #define _HASH_H
 
-#if defined(CONFIG_SHA1SUM_VERIFY) || defined(CONFIG_CRC32_VERIFY)
-#define CONFIG_HASH_VERIFY
+#ifdef USE_HOSTCC
+#include <linux/kconfig.h>
+#endif
+
+struct cmd_tbl;
+
+/*
+ * Maximum digest size for all algorithms we support. Having this value
+ * avoids a malloc() or C99 local declaration in common/cmd_hash.c.
+ */
+#if CONFIG_IS_ENABLED(SHA384) || CONFIG_IS_ENABLED(SHA512)
+#define HASH_MAX_DIGEST_SIZE	64
+#else
+#define HASH_MAX_DIGEST_SIZE	32
 #endif
 
+enum {
+	HASH_FLAG_VERIFY	= 1 << 0,	/* Enable verify mode */
+	HASH_FLAG_ENV		= 1 << 1,	/* Allow env vars */
+};
+
 struct hash_algo {
 	const char *name;			/* Name of algorithm */
 	int digest_size;			/* Length of digest */
@@ -43,19 +44,45 @@ 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);
 };
 
-/*
- * Maximum digest size for all algorithms we support. Having this value
- * avoids a malloc() or C99 local declaration in common/cmd_hash.c.
- */
-#define HASH_MAX_DIGEST_SIZE	32
-
-enum {
-	HASH_FLAG_VERIFY	= 1 << 0,	/* Enable verify mode */
-	HASH_FLAG_ENV		= 1 << 1,	/* Allow env vars */
-};
-
+#ifndef USE_HOSTCC
 /**
  * hash_command: Process a hash command for a particular algorithm
  *
@@ -68,8 +95,8 @@ enum {
  * @argc:		Number of arguments (arg 0 must be the command text)
  * @argv:		Arguments
  */
-int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
-		 int argc, char * const argv[]);
+int hash_command(const char *algo_name, int flags, struct cmd_tbl *cmdtp,
+		 int flag, int argc, char *const argv[]);
 
 /**
  * hash_block() - Hash a block according to the requested algorithm
@@ -87,10 +114,53 @@ int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
  *			If NULL, then it is assumed that the caller has
  *			allocated enough space for the hash. This is possible
  *			since the caller is selecting the algorithm.
- * @return 0 if ok, -ve on error: -EPROTONOSUPPORT for an unknown algorithm,
+ * Return: 0 if ok, -ve on error: -EPROTONOSUPPORT for an unknown algorithm,
  * -ENOSPC if the output buffer is not large enough.
  */
 int hash_block(const char *algo_name, const void *data, unsigned int len,
 	       uint8_t *output, int *output_size);
 
+#endif /* !USE_HOSTCC */
+
+/**
+ * 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);
+
+/**
+ * hash_progressive_lookup_algo() - Look up hash_algo for prog. hash support
+ *
+ * The function returns the pointer to the struct or -EPROTONOSUPPORT if the
+ * algorithm is not available with progressive hash support.
+ *
+ * @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_progressive_lookup_algo(const char *algo_name,
+				 struct hash_algo **algop);
+
+/**
+ * hash_parse_string() - Parse hash string into a binary array
+ *
+ * The function parses a hash string into a binary array that
+ * can for example easily be used to compare to hash values.
+ *
+ * @algo_name: Hash algorithm to look up
+ * @str: Hash string to get parsed
+ * @result: Binary array of the parsed hash string
+ *
+ * Return: 0 if ok, -EPROTONOSUPPORT for an unknown algorithm.
+ */
+int hash_parse_string(const char *algo_name, const char *str, uint8_t *result);
+
 #endif