Release Mbed Crypto 0.1.0a
diff --git a/include/mbedcrypto/cmac.h b/include/mbedcrypto/cmac.h
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+/**
+ * \file cmac.h
+ *
+ * \brief This file contains CMAC definitions and functions.
+ *
+ * The Cipher-based Message Authentication Code (CMAC) Mode for
+ * Authentication is defined in <em>RFC-4493: The AES-CMAC Algorithm</em>.
+ */
+/*
+ * Copyright (C) 2015-2018, 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 Crypto (https://tls.mbed.org)
+ */
+
+#ifndef MBEDCRYPTO_CMAC_H
+#define MBEDCRYPTO_CMAC_H
+
+#include "mbedcrypto/cipher.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MBEDCRYPTO_ERR_CMAC_HW_ACCEL_FAILED -0x007A /**< CMAC hardware accelerator failed. */
+
+#define MBEDCRYPTO_AES_BLOCK_SIZE 16
+#define MBEDCRYPTO_DES3_BLOCK_SIZE 8
+
+#if defined(MBEDCRYPTO_AES_C)
+#define MBEDCRYPTO_CIPHER_BLKSIZE_MAX 16 /**< The longest block used by CMAC is that of AES. */
+#else
+#define MBEDCRYPTO_CIPHER_BLKSIZE_MAX 8 /**< The longest block used by CMAC is that of 3DES. */
+#endif
+
+#if !defined(MBEDCRYPTO_CMAC_ALT)
+
+/**
+ * The CMAC context structure.
+ */
+struct mbedcrypto_cmac_context_t
+{
+ /** The internal state of the CMAC algorithm. */
+ unsigned char state[MBEDCRYPTO_CIPHER_BLKSIZE_MAX];
+
+ /** Unprocessed data - either data that was not block aligned and is still
+ * pending processing, or the final block. */
+ unsigned char unprocessed_block[MBEDCRYPTO_CIPHER_BLKSIZE_MAX];
+
+ /** The length of data pending processing. */
+ size_t unprocessed_len;
+};
+
+#else /* !MBEDCRYPTO_CMAC_ALT */
+#include "cmac_alt.h"
+#endif /* !MBEDCRYPTO_CMAC_ALT */
+
+/**
+ * \brief This function sets the CMAC key, and prepares to authenticate
+ * the input data.
+ * Must be called with an initialized cipher context.
+ *
+ * \param ctx The cipher context used for the CMAC operation, initialized
+ * as one of the following types: MBEDCRYPTO_CIPHER_AES_128_ECB,
+ * MBEDCRYPTO_CIPHER_AES_192_ECB, MBEDCRYPTO_CIPHER_AES_256_ECB,
+ * or MBEDCRYPTO_CIPHER_DES_EDE3_ECB.
+ * \param key The CMAC key.
+ * \param keybits The length of the CMAC key in bits.
+ * Must be supported by the cipher.
+ *
+ * \return \c 0 on success.
+ * \return A cipher-specific error code on failure.
+ */
+int mbedcrypto_cipher_cmac_starts( mbedcrypto_cipher_context_t *ctx,
+ const unsigned char *key, size_t keybits );
+
+/**
+ * \brief This function feeds an input buffer into an ongoing CMAC
+ * computation.
+ *
+ * It is called between mbedcrypto_cipher_cmac_starts() or
+ * mbedcrypto_cipher_cmac_reset(), and mbedcrypto_cipher_cmac_finish().
+ * Can be called repeatedly.
+ *
+ * \param ctx The cipher context used for the CMAC operation.
+ * \param input The buffer holding the input data.
+ * \param ilen The length of the input data.
+ *
+ * \return \c 0 on success.
+ * \return #MBEDCRYPTO_ERR_MD_BAD_INPUT_DATA
+ * if parameter verification fails.
+ */
+int mbedcrypto_cipher_cmac_update( mbedcrypto_cipher_context_t *ctx,
+ const unsigned char *input, size_t ilen );
+
+/**
+ * \brief This function finishes the CMAC operation, and writes
+ * the result to the output buffer.
+ *
+ * It is called after mbedcrypto_cipher_cmac_update().
+ * It can be followed by mbedcrypto_cipher_cmac_reset() and
+ * mbedcrypto_cipher_cmac_update(), or mbedcrypto_cipher_free().
+ *
+ * \param ctx The cipher context used for the CMAC operation.
+ * \param output The output buffer for the CMAC checksum result.
+ *
+ * \return \c 0 on success.
+ * \return #MBEDCRYPTO_ERR_MD_BAD_INPUT_DATA
+ * if parameter verification fails.
+ */
+int mbedcrypto_cipher_cmac_finish( mbedcrypto_cipher_context_t *ctx,
+ unsigned char *output );
+
+/**
+ * \brief This function prepares the authentication of another
+ * message with the same key as the previous CMAC
+ * operation.
+ *
+ * It is called after mbedcrypto_cipher_cmac_finish()
+ * and before mbedcrypto_cipher_cmac_update().
+ *
+ * \param ctx The cipher context used for the CMAC operation.
+ *
+ * \return \c 0 on success.
+ * \return #MBEDCRYPTO_ERR_MD_BAD_INPUT_DATA
+ * if parameter verification fails.
+ */
+int mbedcrypto_cipher_cmac_reset( mbedcrypto_cipher_context_t *ctx );
+
+/**
+ * \brief This function calculates the full generic CMAC
+ * on the input buffer with the provided key.
+ *
+ * The function allocates the context, performs the
+ * calculation, and frees the context.
+ *
+ * The CMAC result is calculated as
+ * output = generic CMAC(cmac key, input buffer).
+ *
+ *
+ * \param cipher_info The cipher information.
+ * \param key The CMAC key.
+ * \param keylen The length of the CMAC key in bits.
+ * \param input The buffer holding the input data.
+ * \param ilen The length of the input data.
+ * \param output The buffer for the generic CMAC result.
+ *
+ * \return \c 0 on success.
+ * \return #MBEDCRYPTO_ERR_MD_BAD_INPUT_DATA
+ * if parameter verification fails.
+ */
+int mbedcrypto_cipher_cmac( const mbedcrypto_cipher_info_t *cipher_info,
+ const unsigned char *key, size_t keylen,
+ const unsigned char *input, size_t ilen,
+ unsigned char *output );
+
+#if defined(MBEDCRYPTO_AES_C)
+/**
+ * \brief This function implements the AES-CMAC-PRF-128 pseudorandom
+ * function, as defined in
+ * <em>RFC-4615: The Advanced Encryption Standard-Cipher-based
+ * Message Authentication Code-Pseudo-Random Function-128
+ * (AES-CMAC-PRF-128) Algorithm for the Internet Key
+ * Exchange Protocol (IKE).</em>
+ *
+ * \param key The key to use.
+ * \param key_len The key length in Bytes.
+ * \param input The buffer holding the input data.
+ * \param in_len The length of the input data in Bytes.
+ * \param output The buffer holding the generated 16 Bytes of
+ * pseudorandom output.
+ *
+ * \return \c 0 on success.
+ */
+int mbedcrypto_aes_cmac_prf_128( const unsigned char *key, size_t key_len,
+ const unsigned char *input, size_t in_len,
+ unsigned char output[16] );
+#endif /* MBEDCRYPTO_AES_C */
+
+#if defined(MBEDCRYPTO_SELF_TEST) && ( defined(MBEDCRYPTO_AES_C) || defined(MBEDCRYPTO_DES_C) )
+/**
+ * \brief The CMAC checkup routine.
+ *
+ * \return \c 0 on success.
+ * \return \c 1 on failure.
+ */
+int mbedcrypto_cmac_self_test( int verbose );
+#endif /* MBEDCRYPTO_SELF_TEST && ( MBEDCRYPTO_AES_C || MBEDCRYPTO_DES_C ) */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDCRYPTO_CMAC_H */