1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/mxc/security/rng/include/shw_hash.h b/drivers/mxc/security/rng/include/shw_hash.h
new file mode 100644
index 000000000000..8026c7ecb3fd
--- /dev/null
+++ b/drivers/mxc/security/rng/include/shw_hash.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU Lesser General
+ * Public License.  You may obtain a copy of the GNU Lesser General
+ * Public License Version 2.1 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/lgpl-license.html
+ * http://www.gnu.org/copyleft/lgpl.html
+ */
+
+/*!
+ * @file shw_hash.h
+ *
+ * This file contains definitions for use of the (internal) SHW hash
+ * software computation.  It defines the usual three steps:
+ *
+ * - #shw_hash_init()
+ * - #shw_hash_update()
+ * - #shw_hash_final()
+ *
+ * The only other item of note to callers is #SHW_HASH_LEN, which is the number
+ * of bytes calculated for the hash.
+ */
+
+#ifndef SHW_HASH_H
+#define SHW_HASH_H
+
+/*! Define which gives the number of bytes available in an hash result */
+#define SHW_HASH_LEN 32
+
+/* Define which matches block length in bytes of the underlying hash */
+#define SHW_HASH_BLOCK_LEN 64
+
+/* "Internal" define which matches SHA-256 state size (32-bit words) */
+#define SHW_HASH_STATE_WORDS 8
+
+/* "Internal" define which matches word length in blocks of the underlying
+   hash. */
+#define SHW_HASH_BLOCK_WORD_SIZE 16
+
+#define SHW_HASH_STATE_SIZE 32
+
+/*!
+ * State for a SHA-1/SHA-2 Hash
+ *
+ * (Note to maintainers: state needs to be updated to uint64_t to handle
+ * SHA-384/SHA-512)... And bit_count to uint128_t (heh).
+ */
+typedef struct shw_hash_state {
+	unsigned int partial_count_bytes;	/*!< Number of bytes of message sitting
+						 * in @c partial_block */
+	uint8_t partial_block[SHW_HASH_BLOCK_LEN];	/*!< Data waiting to be processed as a block  */
+	uint32_t state[SHW_HASH_STATE_WORDS];	/*!< Current hash state variables */
+	uint64_t bit_count;	/*!< Number of bits sent through the update function */
+} shw_hash_state_t;
+
+/*!
+ * Initialize the hash state structure
+ *
+ * @param state     Address of hash state structure.
+ * @param algorithm Which hash algorithm to use (must be FSL_HASH_ALG_SHA256)
+ *
+ * @return  FSL_RETURN_OK_S if all went well, otherwise an error code.
+ */
+fsl_shw_return_t shw_hash_init(shw_hash_state_t * state,
+			       fsl_shw_hash_alg_t algorithm);
+
+/*!
+ * Put data into the hash calculation
+ *
+ * @param state     Address of hash state structure.
+ * @param msg       Address of the message data for the hash.
+ * @param msg_len   Number of bytes of @c msg.
+ *
+ * @return  FSL_RETURN_OK_S if all went well, otherwise an error code.
+ */
+fsl_shw_return_t shw_hash_update(shw_hash_state_t * state,
+				 const uint8_t * msg, unsigned int msg_len);
+
+/*!
+ * Calculate the final hash value
+ *
+ * @param state     Address of hash state structure.
+ * @param hash      Address of location to store the hash.
+ * @param hash_len  Number of bytes of @c hash to be stored.
+ *
+ * @return FSL_RETURN_OK_S if all went well, FSL_RETURN_BAD_DATA_LENGTH_S if
+ * hash_len is too long, otherwise an error code.
+ */
+fsl_shw_return_t shw_hash_final(shw_hash_state_t * state,
+				uint8_t * hash, unsigned int hash_len);
+
+#endif				/* SHW_HASH_H */