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Diffstat (limited to 'lib/mbedtls-2.27.0/include/mbedtls/poly1305.h')
| -rw-r--r-- | lib/mbedtls-2.27.0/include/mbedtls/poly1305.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/lib/mbedtls-2.27.0/include/mbedtls/poly1305.h b/lib/mbedtls-2.27.0/include/mbedtls/poly1305.h new file mode 100644 index 0000000..905c145 --- /dev/null +++ b/lib/mbedtls-2.27.0/include/mbedtls/poly1305.h @@ -0,0 +1,191 @@ +/** + * \file poly1305.h + * + * \brief This file contains Poly1305 definitions and functions. + * + * Poly1305 is a one-time message authenticator that can be used to + * authenticate messages. Poly1305-AES was created by Daniel + * Bernstein https://cr.yp.to/mac/poly1305-20050329.pdf The generic + * Poly1305 algorithm (not tied to AES) was also standardized in RFC + * 7539. + * + * \author Daniel King <damaki.gh@gmail.com> + */ + +/* + * Copyright The Mbed TLS Contributors + * 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. + */ + +#ifndef MBEDTLS_POLY1305_H +#define MBEDTLS_POLY1305_H + +#if !defined(MBEDTLS_CONFIG_FILE) +#include "mbedtls/config.h" +#else +#include MBEDTLS_CONFIG_FILE +#endif + +#include <stdint.h> +#include <stddef.h> + +#define MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA -0x0057 /**< Invalid input parameter(s). */ + +/* MBEDTLS_ERR_POLY1305_FEATURE_UNAVAILABLE is deprecated and should not be + * used. */ +#define MBEDTLS_ERR_POLY1305_FEATURE_UNAVAILABLE -0x0059 /**< Feature not available. For example, s part of the API is not implemented. */ + +/* MBEDTLS_ERR_POLY1305_HW_ACCEL_FAILED is deprecated and should not be used. + */ +#define MBEDTLS_ERR_POLY1305_HW_ACCEL_FAILED -0x005B /**< Poly1305 hardware accelerator failed. */ + +#ifdef __cplusplus +extern "C" { +#endif + +#if !defined(MBEDTLS_POLY1305_ALT) + +typedef struct mbedtls_poly1305_context +{ + uint32_t r[4]; /** The value for 'r' (low 128 bits of the key). */ + uint32_t s[4]; /** The value for 's' (high 128 bits of the key). */ + uint32_t acc[5]; /** The accumulator number. */ + uint8_t queue[16]; /** The current partial block of data. */ + size_t queue_len; /** The number of bytes stored in 'queue'. */ +} +mbedtls_poly1305_context; + +#else /* MBEDTLS_POLY1305_ALT */ +#include "poly1305_alt.h" +#endif /* MBEDTLS_POLY1305_ALT */ + +/** + * \brief This function initializes the specified Poly1305 context. + * + * It must be the first API called before using + * the context. + * + * It is usually followed by a call to + * \c mbedtls_poly1305_starts(), then one or more calls to + * \c mbedtls_poly1305_update(), then one call to + * \c mbedtls_poly1305_finish(), then finally + * \c mbedtls_poly1305_free(). + * + * \param ctx The Poly1305 context to initialize. This must + * not be \c NULL. + */ +void mbedtls_poly1305_init( mbedtls_poly1305_context *ctx ); + +/** + * \brief This function releases and clears the specified + * Poly1305 context. + * + * \param ctx The Poly1305 context to clear. This may be \c NULL, in which + * case this function is a no-op. If it is not \c NULL, it must + * point to an initialized Poly1305 context. + */ +void mbedtls_poly1305_free( mbedtls_poly1305_context *ctx ); + +/** + * \brief This function sets the one-time authentication key. + * + * \warning The key must be unique and unpredictable for each + * invocation of Poly1305. + * + * \param ctx The Poly1305 context to which the key should be bound. + * This must be initialized. + * \param key The buffer containing the \c 32 Byte (\c 256 Bit) key. + * + * \return \c 0 on success. + * \return A negative error code on failure. + */ +int mbedtls_poly1305_starts( mbedtls_poly1305_context *ctx, + const unsigned char key[32] ); + +/** + * \brief This functions feeds an input buffer into an ongoing + * Poly1305 computation. + * + * It is called between \c mbedtls_cipher_poly1305_starts() and + * \c mbedtls_cipher_poly1305_finish(). + * It can be called repeatedly to process a stream of data. + * + * \param ctx The Poly1305 context to use for the Poly1305 operation. + * This must be initialized and bound to a key. + * \param ilen The length of the input data in Bytes. + * Any value is accepted. + * \param input The buffer holding the input data. + * This pointer can be \c NULL if `ilen == 0`. + * + * \return \c 0 on success. + * \return A negative error code on failure. + */ +int mbedtls_poly1305_update( mbedtls_poly1305_context *ctx, + const unsigned char *input, + size_t ilen ); + +/** + * \brief This function generates the Poly1305 Message + * Authentication Code (MAC). + * + * \param ctx The Poly1305 context to use for the Poly1305 operation. + * This must be initialized and bound to a key. + * \param mac The buffer to where the MAC is written. This must + * be a writable buffer of length \c 16 Bytes. + * + * \return \c 0 on success. + * \return A negative error code on failure. + */ +int mbedtls_poly1305_finish( mbedtls_poly1305_context *ctx, + unsigned char mac[16] ); + +/** + * \brief This function calculates the Poly1305 MAC of the input + * buffer with the provided key. + * + * \warning The key must be unique and unpredictable for each + * invocation of Poly1305. + * + * \param key The buffer containing the \c 32 Byte (\c 256 Bit) key. + * \param ilen The length of the input data in Bytes. + * Any value is accepted. + * \param input The buffer holding the input data. + * This pointer can be \c NULL if `ilen == 0`. + * \param mac The buffer to where the MAC is written. This must be + * a writable buffer of length \c 16 Bytes. + * + * \return \c 0 on success. + * \return A negative error code on failure. + */ +int mbedtls_poly1305_mac( const unsigned char key[32], + const unsigned char *input, + size_t ilen, + unsigned char mac[16] ); + +#if defined(MBEDTLS_SELF_TEST) +/** + * \brief The Poly1305 checkup routine. + * + * \return \c 0 on success. + * \return \c 1 on failure. + */ +int mbedtls_poly1305_self_test( int verbose ); +#endif /* MBEDTLS_SELF_TEST */ + +#ifdef __cplusplus +} +#endif + +#endif /* MBEDTLS_POLY1305_H */ |