#ifndef _HASH_H
#define _HASH_H
-#ifdef CONFIG_SHA1SUM_VERIFY
+#if defined(CONFIG_SHA1SUM_VERIFY) || defined(CONFIG_CRC32_VERIFY)
#define CONFIG_HASH_VERIFY
#endif
*/
#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