kbuild: use shorten log for linking u-boot

[karo-tx-uboot.git] / include / hash.h

diff --git a/include/hash.h b/include/hash.h
index 34ba558bd09d331f58c2add0f796d67ebec979f4..e92d27218c486f1dca86368bbca8a788d63e6584 100644 (file)
--- a/include/hash.h
+++ b/include/hash.h
@@ -1,28 +1,12 @@
 /*
  * 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
 #define _HASH_H
 
-#ifdef CONFIG_SHA1SUM_VERIFY
+#if defined(CONFIG_SHA1SUM_VERIFY) || defined(CONFIG_CRC32_VERIFY)
 #define CONFIG_HASH_VERIFY
 #endif
 
@@ -51,19 +35,46 @@ struct hash_algo {
  */
 #define HASH_MAX_DIGEST_SIZE   32
 
+enum {
+       HASH_FLAG_VERIFY        = 1 << 0,       /* Enable verify mode */
+       HASH_FLAG_ENV           = 1 << 1,       /* Allow env vars */
+};
+
 /**
  * hash_command: Process a hash command for a particular algorithm
  *
  * This common function is used to implement specific hash commands.
  *
- * @algo_name:         Hash algorithm being used
- * @verify:            Non-zero to enable verify mode
+ * @algo_name:         Hash algorithm being used (lower case!)
+ * @flags:             Flags value (HASH_FLAG_...)
  * @cmdtp:             Pointer to command table entry
  * @flag:              Some flags normally 0 (see CMD_FLAG_.. above)
  * @argc:              Number of arguments (arg 0 must be the command text)
  * @argv:              Arguments
  */
-int hash_command(const char *algo_name, int verify, cmd_tbl_t *cmdtp, int flag,
+int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
                 int argc, char * const argv[]);
 
+/**
+ * hash_block() - Hash a block according to the requested algorithm
+ *
+ * The caller probably knows the hash length for the chosen algorithm, but
+ * in order to provide a general interface, and output_size parameter is
+ * provided.
+ *
+ * @algo_name:         Hash algorithm to use
+ * @data:              Data to hash
+ * @len:               Lengh of data to hash in bytes
+ * @output:            Place to put hash value
+ * @output_size:       On entry, pointer to the number of bytes available in
+ *                     output. On exit, pointer to the number of bytes used.
+ *                     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,
+ * -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