--- /dev/null
+/**
+ * \file blowfish.h
+ *
+ * \brief Blowfish block cipher
+ */
+/*
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_BLOWFISH_H
+#define MBEDTLS_BLOWFISH_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define MBEDTLS_BLOWFISH_ENCRYPT 1
+#define MBEDTLS_BLOWFISH_DECRYPT 0
+#define MBEDTLS_BLOWFISH_MAX_KEY_BITS 448
+#define MBEDTLS_BLOWFISH_MIN_KEY_BITS 32
+#define MBEDTLS_BLOWFISH_ROUNDS 16 /**< Rounds to use. When increasing this value, make sure to extend the initialisation vectors */
+#define MBEDTLS_BLOWFISH_BLOCKSIZE 8 /* Blowfish uses 64 bit blocks */
+
+#define MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH -0x0016 /**< Invalid key length. */
+#define MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED -0x0017 /**< Blowfish hardware accelerator failed. */
+#define MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH -0x0018 /**< Invalid data input length. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(MBEDTLS_BLOWFISH_ALT)
+// Regular implementation
+//
+
+/**
+ * \brief Blowfish context structure
+ */
+typedef struct mbedtls_blowfish_context
+{
+ uint32_t P[MBEDTLS_BLOWFISH_ROUNDS + 2]; /*!< Blowfish round keys */
+ uint32_t S[4][256]; /*!< key dependent S-boxes */
+}
+mbedtls_blowfish_context;
+
+#else /* MBEDTLS_BLOWFISH_ALT */
+#include "blowfish_alt.h"
+#endif /* MBEDTLS_BLOWFISH_ALT */
+
+/**
+ * \brief Initialize Blowfish context
+ *
+ * \param ctx Blowfish context to be initialized
+ */
+void mbedtls_blowfish_init( mbedtls_blowfish_context *ctx );
+
+/**
+ * \brief Clear Blowfish context
+ *
+ * \param ctx Blowfish context to be cleared
+ */
+void mbedtls_blowfish_free( mbedtls_blowfish_context *ctx );
+
+/**
+ * \brief Blowfish key schedule
+ *
+ * \param ctx Blowfish context to be initialized
+ * \param key encryption key
+ * \param keybits must be between 32 and 448 bits
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH
+ */
+int mbedtls_blowfish_setkey( mbedtls_blowfish_context *ctx, const unsigned char *key,
+ unsigned int keybits );
+
+/**
+ * \brief Blowfish-ECB block encryption/decryption
+ *
+ * \param ctx Blowfish context
+ * \param mode MBEDTLS_BLOWFISH_ENCRYPT or MBEDTLS_BLOWFISH_DECRYPT
+ * \param input 8-byte input block
+ * \param output 8-byte output block
+ *
+ * \return 0 if successful
+ */
+int mbedtls_blowfish_crypt_ecb( mbedtls_blowfish_context *ctx,
+ int mode,
+ const unsigned char input[MBEDTLS_BLOWFISH_BLOCKSIZE],
+ unsigned char output[MBEDTLS_BLOWFISH_BLOCKSIZE] );
+
+#if defined(MBEDTLS_CIPHER_MODE_CBC)
+/**
+ * \brief Blowfish-CBC buffer encryption/decryption
+ * Length should be a multiple of the block
+ * size (8 bytes)
+ *
+ * \note Upon exit, the content of the IV is updated so that you can
+ * call the function same function again on the following
+ * block(s) of data and get the same result as if it was
+ * encrypted in one call. This allows a "streaming" usage.
+ * If on the other hand you need to retain the contents of the
+ * IV, you should either save it manually or use the cipher
+ * module instead.
+ *
+ * \param ctx Blowfish context
+ * \param mode MBEDTLS_BLOWFISH_ENCRYPT or MBEDTLS_BLOWFISH_DECRYPT
+ * \param length length of the input data
+ * \param iv initialization vector (updated after use)
+ * \param input buffer holding the input data
+ * \param output buffer holding the output data
+ *
+ * \return 0 if successful, or
+ * MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH
+ */
+int mbedtls_blowfish_crypt_cbc( mbedtls_blowfish_context *ctx,
+ int mode,
+ size_t length,
+ unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE],
+ const unsigned char *input,
+ unsigned char *output );
+#endif /* MBEDTLS_CIPHER_MODE_CBC */
+
+#if defined(MBEDTLS_CIPHER_MODE_CFB)
+/**
+ * \brief Blowfish CFB buffer encryption/decryption.
+ *
+ * \note Upon exit, the content of the IV is updated so that you can
+ * call the function same function again on the following
+ * block(s) of data and get the same result as if it was
+ * encrypted in one call. This allows a "streaming" usage.
+ * If on the other hand you need to retain the contents of the
+ * IV, you should either save it manually or use the cipher
+ * module instead.
+ *
+ * \param ctx Blowfish context
+ * \param mode MBEDTLS_BLOWFISH_ENCRYPT or MBEDTLS_BLOWFISH_DECRYPT
+ * \param length length of the input data
+ * \param iv_off offset in IV (updated after use)
+ * \param iv initialization vector (updated after use)
+ * \param input buffer holding the input data
+ * \param output buffer holding the output data
+ *
+ * \return 0 if successful
+ */
+int mbedtls_blowfish_crypt_cfb64( mbedtls_blowfish_context *ctx,
+ int mode,
+ size_t length,
+ size_t *iv_off,
+ unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE],
+ const unsigned char *input,
+ unsigned char *output );
+#endif /*MBEDTLS_CIPHER_MODE_CFB */
+
+#if defined(MBEDTLS_CIPHER_MODE_CTR)
+/**
+ * \brief Blowfish-CTR buffer encryption/decryption
+ *
+ * \warning You must never reuse a nonce value with the same key. Doing so
+ * would void the encryption for the two messages encrypted with
+ * the same nonce and key.
+ *
+ * There are two common strategies for managing nonces with CTR:
+ *
+ * 1. You can handle everything as a single message processed over
+ * successive calls to this function. In that case, you want to
+ * set \p nonce_counter and \p nc_off to 0 for the first call, and
+ * then preserve the values of \p nonce_counter, \p nc_off and \p
+ * stream_block across calls to this function as they will be
+ * updated by this function.
+ *
+ * With this strategy, you must not encrypt more than 2**64
+ * blocks of data with the same key.
+ *
+ * 2. You can encrypt separate messages by dividing the \p
+ * nonce_counter buffer in two areas: the first one used for a
+ * per-message nonce, handled by yourself, and the second one
+ * updated by this function internally.
+ *
+ * For example, you might reserve the first 4 bytes for the
+ * per-message nonce, and the last 4 bytes for internal use. In that
+ * case, before calling this function on a new message you need to
+ * set the first 4 bytes of \p nonce_counter to your chosen nonce
+ * value, the last 4 to 0, and \p nc_off to 0 (which will cause \p
+ * stream_block to be ignored). That way, you can encrypt at most
+ * 2**32 messages of up to 2**32 blocks each with the same key.
+ *
+ * The per-message nonce (or information sufficient to reconstruct
+ * it) needs to be communicated with the ciphertext and must be unique.
+ * The recommended way to ensure uniqueness is to use a message
+ * counter.
+ *
+ * Note that for both stategies, sizes are measured in blocks and
+ * that a Blowfish block is 8 bytes.
+ *
+ * \warning Upon return, \p stream_block contains sensitive data. Its
+ * content must not be written to insecure storage and should be
+ * securely discarded as soon as it's no longer needed.
+ *
+ * \param ctx Blowfish context
+ * \param length The length of the data
+ * \param nc_off The offset in the current stream_block (for resuming
+ * within current cipher stream). The offset pointer to
+ * should be 0 at the start of a stream.
+ * \param nonce_counter The 64-bit nonce and counter.
+ * \param stream_block The saved stream-block for resuming. Is overwritten
+ * by the function.
+ * \param input The input data stream
+ * \param output The output data stream
+ *
+ * \return 0 if successful
+ */
+int mbedtls_blowfish_crypt_ctr( mbedtls_blowfish_context *ctx,
+ size_t length,
+ size_t *nc_off,
+ unsigned char nonce_counter[MBEDTLS_BLOWFISH_BLOCKSIZE],
+ unsigned char stream_block[MBEDTLS_BLOWFISH_BLOCKSIZE],
+ const unsigned char *input,
+ unsigned char *output );
+#endif /* MBEDTLS_CIPHER_MODE_CTR */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* blowfish.h */
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