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Diffstat (limited to 'FreeRTOS-Labs/Source/mbedtls/include/mbedtls/nist_kw.h')
| -rw-r--r-- | FreeRTOS-Labs/Source/mbedtls/include/mbedtls/nist_kw.h | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/FreeRTOS-Labs/Source/mbedtls/include/mbedtls/nist_kw.h b/FreeRTOS-Labs/Source/mbedtls/include/mbedtls/nist_kw.h new file mode 100644 index 000000000..5c1948dc2 --- /dev/null +++ b/FreeRTOS-Labs/Source/mbedtls/include/mbedtls/nist_kw.h @@ -0,0 +1,184 @@ +/**
+ * \file nist_kw.h
+ *
+ * \brief This file provides an API for key wrapping (KW) and key wrapping with
+ * padding (KWP) as defined in NIST SP 800-38F.
+ * https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-38F.pdf
+ *
+ * Key wrapping specifies a deterministic authenticated-encryption mode
+ * of operation, according to <em>NIST SP 800-38F: Recommendation for
+ * Block Cipher Modes of Operation: Methods for Key Wrapping</em>. Its
+ * purpose is to protect cryptographic keys.
+ *
+ * Its equivalent is RFC 3394 for KW, and RFC 5649 for KWP.
+ * https://tools.ietf.org/html/rfc3394
+ * https://tools.ietf.org/html/rfc5649
+ *
+ */
+/*
+ * Copyright (C) 2018, Arm Limited (or its affiliates), All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is part of Mbed TLS (https://tls.mbed.org)
+ */
+
+#ifndef MBEDTLS_NIST_KW_H
+#define MBEDTLS_NIST_KW_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include "cipher.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum
+{
+ MBEDTLS_KW_MODE_KW = 0,
+ MBEDTLS_KW_MODE_KWP = 1
+} mbedtls_nist_kw_mode_t;
+
+#if !defined(MBEDTLS_NIST_KW_ALT)
+// Regular implementation
+//
+
+/**
+ * \brief The key wrapping context-type definition. The key wrapping context is passed
+ * to the APIs called.
+ *
+ * \note The definition of this type may change in future library versions.
+ * Don't make any assumptions on this context!
+ */
+typedef struct {
+ mbedtls_cipher_context_t cipher_ctx; /*!< The cipher context used. */
+} mbedtls_nist_kw_context;
+
+#else /* MBEDTLS_NIST_key wrapping_ALT */
+#include "nist_kw_alt.h"
+#endif /* MBEDTLS_NIST_KW_ALT */
+
+/**
+ * \brief This function initializes the specified key wrapping context
+ * to make references valid and prepare the context
+ * for mbedtls_nist_kw_setkey() or mbedtls_nist_kw_free().
+ *
+ * \param ctx The key wrapping context to initialize.
+ *
+ */
+void mbedtls_nist_kw_init( mbedtls_nist_kw_context *ctx );
+
+/**
+ * \brief This function initializes the key wrapping context set in the
+ * \p ctx parameter and sets the encryption key.
+ *
+ * \param ctx The key wrapping context.
+ * \param cipher The 128-bit block cipher to use. Only AES is supported.
+ * \param key The Key Encryption Key (KEK).
+ * \param keybits The KEK size in bits. This must be acceptable by the cipher.
+ * \param is_wrap Specify whether the operation within the context is wrapping or unwrapping
+ *
+ * \return \c 0 on success.
+ * \return \c MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA for any invalid input.
+ * \return \c MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE for 128-bit block ciphers
+ * which are not supported.
+ * \return cipher-specific error code on failure of the underlying cipher.
+ */
+int mbedtls_nist_kw_setkey( mbedtls_nist_kw_context *ctx,
+ mbedtls_cipher_id_t cipher,
+ const unsigned char *key,
+ unsigned int keybits,
+ const int is_wrap );
+
+/**
+ * \brief This function releases and clears the specified key wrapping context
+ * and underlying cipher sub-context.
+ *
+ * \param ctx The key wrapping context to clear.
+ */
+void mbedtls_nist_kw_free( mbedtls_nist_kw_context *ctx );
+
+/**
+ * \brief This function encrypts a buffer using key wrapping.
+ *
+ * \param ctx The key wrapping context to use for encryption.
+ * \param mode The key wrapping mode to use (MBEDTLS_KW_MODE_KW or MBEDTLS_KW_MODE_KWP)
+ * \param input The buffer holding the input data.
+ * \param in_len The length of the input data in Bytes.
+ * The input uses units of 8 Bytes called semiblocks.
+ * <ul><li>For KW mode: a multiple of 8 bytes between 16 and 2^57-8 inclusive. </li>
+ * <li>For KWP mode: any length between 1 and 2^32-1 inclusive.</li></ul>
+ * \param[out] output The buffer holding the output data.
+ * <ul><li>For KW mode: Must be at least 8 bytes larger than \p in_len.</li>
+ * <li>For KWP mode: Must be at least 8 bytes larger rounded up to a multiple of
+ * 8 bytes for KWP (15 bytes at most).</li></ul>
+ * \param[out] out_len The number of bytes written to the output buffer. \c 0 on failure.
+ * \param[in] out_size The capacity of the output buffer.
+ *
+ * \return \c 0 on success.
+ * \return \c MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA for invalid input length.
+ * \return cipher-specific error code on failure of the underlying cipher.
+ */
+int mbedtls_nist_kw_wrap( mbedtls_nist_kw_context *ctx, mbedtls_nist_kw_mode_t mode,
+ const unsigned char *input, size_t in_len,
+ unsigned char *output, size_t* out_len, size_t out_size );
+
+/**
+ * \brief This function decrypts a buffer using key wrapping.
+ *
+ * \param ctx The key wrapping context to use for decryption.
+ * \param mode The key wrapping mode to use (MBEDTLS_KW_MODE_KW or MBEDTLS_KW_MODE_KWP)
+ * \param input The buffer holding the input data.
+ * \param in_len The length of the input data in Bytes.
+ * The input uses units of 8 Bytes called semiblocks.
+ * The input must be a multiple of semiblocks.
+ * <ul><li>For KW mode: a multiple of 8 bytes between 24 and 2^57 inclusive. </li>
+ * <li>For KWP mode: a multiple of 8 bytes between 16 and 2^32 inclusive.</li></ul>
+ * \param[out] output The buffer holding the output data.
+ * The output buffer's minimal length is 8 bytes shorter than \p in_len.
+ * \param[out] out_len The number of bytes written to the output buffer. \c 0 on failure.
+ * For KWP mode, the length could be up to 15 bytes shorter than \p in_len,
+ * depending on how much padding was added to the data.
+ * \param[in] out_size The capacity of the output buffer.
+ *
+ * \return \c 0 on success.
+ * \return \c MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA for invalid input length.
+ * \return \c MBEDTLS_ERR_CIPHER_AUTH_FAILED for verification failure of the ciphertext.
+ * \return cipher-specific error code on failure of the underlying cipher.
+ */
+int mbedtls_nist_kw_unwrap( mbedtls_nist_kw_context *ctx, mbedtls_nist_kw_mode_t mode,
+ const unsigned char *input, size_t in_len,
+ unsigned char *output, size_t* out_len, size_t out_size);
+
+
+#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
+/**
+ * \brief The key wrapping checkup routine.
+ *
+ * \return \c 0 on success.
+ * \return \c 1 on failure.
+ */
+int mbedtls_nist_kw_self_test( int verbose );
+#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_NIST_KW_H */
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