Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / include / hash.h

diff --git a/qemu/roms/u-boot/include/hash.h b/qemu/roms/u-boot/include/hash.h
new file mode 100644 (file)
index 0000000..dc21678
--- /dev/null
+++ b/qemu/roms/u-boot/include/hash.h
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2012 The Chromium OS Authors.
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef _HASH_H
+#define _HASH_H
+
+#if defined(CONFIG_SHA1SUM_VERIFY) || defined(CONFIG_CRC32_VERIFY)
+#define CONFIG_HASH_VERIFY
+#endif
+
+struct hash_algo {
+       const char *name;                       /* Name of algorithm */
+       int digest_size;                        /* Length of digest */
+       /**
+        * hash_func_ws: Generic hashing function
+        *
+        * This is the generic prototype for a hashing function. We only
+        * have the watchdog version at present.
+        *
+        * @input:      Input buffer
+        * @ilen:       Input buffer length
+        * @output:     Checksum result (length depends on algorithm)
+        * @chunk_sz:   Trigger watchdog after processing this many bytes
+        */
+       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 */
+};
+
+/**
+ * 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 (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 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);
+
+/**
+ * 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