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authorAdam Harrison <adamdharrison@gmail.com>2022-11-26 16:20:59 -0500
committerAdam Harrison <adamdharrison@gmail.com>2022-11-29 18:39:46 -0500
commitfc0c4ed9a3103e0e6534311923668879fc8e0875 (patch)
tree6e7723c3f45d39f06c243d9c18a3c038da948793 /lib/mbedtls-2.27.0/include/mbedtls/chachapoly.h
parent3836606e2b735ba7b2dc0f580231843660587fb4 (diff)
downloadlite-xl-plugin-manager-fc0c4ed9a3103e0e6534311923668879fc8e0875.tar.gz
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Removed openssl, and curl, and added mbedded tls.curl-removal
Almost fully removed curl, needs more testing. Fixed most issues, now trying to cross compile. Fix? Sigh.
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+/**
+ * \file chachapoly.h
+ *
+ * \brief This file contains the AEAD-ChaCha20-Poly1305 definitions and
+ * functions.
+ *
+ * ChaCha20-Poly1305 is an algorithm for Authenticated Encryption
+ * with Associated Data (AEAD) that can be used to encrypt and
+ * authenticate data. It is based on ChaCha20 and Poly1305 by Daniel
+ * Bernstein and was 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_CHACHAPOLY_H
+#define MBEDTLS_CHACHAPOLY_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+/* for shared error codes */
+#include "mbedtls/poly1305.h"
+
+#define MBEDTLS_ERR_CHACHAPOLY_BAD_STATE -0x0054 /**< The requested operation is not permitted in the current state. */
+#define MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED -0x0056 /**< Authenticated decryption failed: data was not authentic. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum
+{
+ MBEDTLS_CHACHAPOLY_ENCRYPT, /**< The mode value for performing encryption. */
+ MBEDTLS_CHACHAPOLY_DECRYPT /**< The mode value for performing decryption. */
+}
+mbedtls_chachapoly_mode_t;
+
+#if !defined(MBEDTLS_CHACHAPOLY_ALT)
+
+#include "mbedtls/chacha20.h"
+
+typedef struct mbedtls_chachapoly_context
+{
+ mbedtls_chacha20_context chacha20_ctx; /**< The ChaCha20 context. */
+ mbedtls_poly1305_context poly1305_ctx; /**< The Poly1305 context. */
+ uint64_t aad_len; /**< The length (bytes) of the Additional Authenticated Data. */
+ uint64_t ciphertext_len; /**< The length (bytes) of the ciphertext. */
+ int state; /**< The current state of the context. */
+ mbedtls_chachapoly_mode_t mode; /**< Cipher mode (encrypt or decrypt). */
+}
+mbedtls_chachapoly_context;
+
+#else /* !MBEDTLS_CHACHAPOLY_ALT */
+#include "chachapoly_alt.h"
+#endif /* !MBEDTLS_CHACHAPOLY_ALT */
+
+/**
+ * \brief This function initializes the specified ChaCha20-Poly1305 context.
+ *
+ * It must be the first API called before using
+ * the context. It must be followed by a call to
+ * \c mbedtls_chachapoly_setkey() before any operation can be
+ * done, and to \c mbedtls_chachapoly_free() once all
+ * operations with that context have been finished.
+ *
+ * In order to encrypt or decrypt full messages at once, for
+ * each message you should make a single call to
+ * \c mbedtls_chachapoly_crypt_and_tag() or
+ * \c mbedtls_chachapoly_auth_decrypt().
+ *
+ * In order to encrypt messages piecewise, for each
+ * message you should make a call to
+ * \c mbedtls_chachapoly_starts(), then 0 or more calls to
+ * \c mbedtls_chachapoly_update_aad(), then 0 or more calls to
+ * \c mbedtls_chachapoly_update(), then one call to
+ * \c mbedtls_chachapoly_finish().
+ *
+ * \warning Decryption with the piecewise API is discouraged! Always
+ * use \c mbedtls_chachapoly_auth_decrypt() when possible!
+ *
+ * If however this is not possible because the data is too
+ * large to fit in memory, you need to:
+ *
+ * - call \c mbedtls_chachapoly_starts() and (if needed)
+ * \c mbedtls_chachapoly_update_aad() as above,
+ * - call \c mbedtls_chachapoly_update() multiple times and
+ * ensure its output (the plaintext) is NOT used in any other
+ * way than placing it in temporary storage at this point,
+ * - call \c mbedtls_chachapoly_finish() to compute the
+ * authentication tag and compared it in constant time to the
+ * tag received with the ciphertext.
+ *
+ * If the tags are not equal, you must immediately discard
+ * all previous outputs of \c mbedtls_chachapoly_update(),
+ * otherwise you can now safely use the plaintext.
+ *
+ * \param ctx The ChachaPoly context to initialize. Must not be \c NULL.
+ */
+void mbedtls_chachapoly_init( mbedtls_chachapoly_context *ctx );
+
+/**
+ * \brief This function releases and clears the specified
+ * ChaCha20-Poly1305 context.
+ *
+ * \param ctx The ChachaPoly context to clear. This may be \c NULL, in which
+ * case this function is a no-op.
+ */
+void mbedtls_chachapoly_free( mbedtls_chachapoly_context *ctx );
+
+/**
+ * \brief This function sets the ChaCha20-Poly1305
+ * symmetric encryption key.
+ *
+ * \param ctx The ChaCha20-Poly1305 context to which the key should be
+ * bound. This must be initialized.
+ * \param key The \c 256 Bit (\c 32 Bytes) key.
+ *
+ * \return \c 0 on success.
+ * \return A negative error code on failure.
+ */
+int mbedtls_chachapoly_setkey( mbedtls_chachapoly_context *ctx,
+ const unsigned char key[32] );
+
+/**
+ * \brief This function starts a ChaCha20-Poly1305 encryption or
+ * decryption operation.
+ *
+ * \warning You must never use the same nonce twice with the same key.
+ * This would void any confidentiality and authenticity
+ * guarantees for the messages encrypted with the same nonce
+ * and key.
+ *
+ * \note If the context is being used for AAD only (no data to
+ * encrypt or decrypt) then \p mode can be set to any value.
+ *
+ * \warning Decryption with the piecewise API is discouraged, see the
+ * warning on \c mbedtls_chachapoly_init().
+ *
+ * \param ctx The ChaCha20-Poly1305 context. This must be initialized
+ * and bound to a key.
+ * \param nonce The nonce/IV to use for the message.
+ * This must be a redable buffer of length \c 12 Bytes.
+ * \param mode The operation to perform: #MBEDTLS_CHACHAPOLY_ENCRYPT or
+ * #MBEDTLS_CHACHAPOLY_DECRYPT (discouraged, see warning).
+ *
+ * \return \c 0 on success.
+ * \return A negative error code on failure.
+ */
+int mbedtls_chachapoly_starts( mbedtls_chachapoly_context *ctx,
+ const unsigned char nonce[12],
+ mbedtls_chachapoly_mode_t mode );
+
+/**
+ * \brief This function feeds additional data to be authenticated
+ * into an ongoing ChaCha20-Poly1305 operation.
+ *
+ * The Additional Authenticated Data (AAD), also called
+ * Associated Data (AD) is only authenticated but not
+ * encrypted nor included in the encrypted output. It is
+ * usually transmitted separately from the ciphertext or
+ * computed locally by each party.
+ *
+ * \note This function is called before data is encrypted/decrypted.
+ * I.e. call this function to process the AAD before calling
+ * \c mbedtls_chachapoly_update().
+ *
+ * You may call this function multiple times to process
+ * an arbitrary amount of AAD. It is permitted to call
+ * this function 0 times, if no AAD is used.
+ *
+ * This function cannot be called any more if data has
+ * been processed by \c mbedtls_chachapoly_update(),
+ * or if the context has been finished.
+ *
+ * \warning Decryption with the piecewise API is discouraged, see the
+ * warning on \c mbedtls_chachapoly_init().
+ *
+ * \param ctx The ChaCha20-Poly1305 context. This must be initialized
+ * and bound to a key.
+ * \param aad_len The length in Bytes of the AAD. The length has no
+ * restrictions.
+ * \param aad Buffer containing the AAD.
+ * This pointer can be \c NULL if `aad_len == 0`.
+ *
+ * \return \c 0 on success.
+ * \return #MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA
+ * if \p ctx or \p aad are NULL.
+ * \return #MBEDTLS_ERR_CHACHAPOLY_BAD_STATE
+ * if the operations has not been started or has been
+ * finished, or if the AAD has been finished.
+ */
+int mbedtls_chachapoly_update_aad( mbedtls_chachapoly_context *ctx,
+ const unsigned char *aad,
+ size_t aad_len );
+
+/**
+ * \brief Thus function feeds data to be encrypted or decrypted
+ * into an on-going ChaCha20-Poly1305
+ * operation.
+ *
+ * The direction (encryption or decryption) depends on the
+ * mode that was given when calling
+ * \c mbedtls_chachapoly_starts().
+ *
+ * You may call this function multiple times to process
+ * an arbitrary amount of data. It is permitted to call
+ * this function 0 times, if no data is to be encrypted
+ * or decrypted.
+ *
+ * \warning Decryption with the piecewise API is discouraged, see the
+ * warning on \c mbedtls_chachapoly_init().
+ *
+ * \param ctx The ChaCha20-Poly1305 context to use. This must be initialized.
+ * \param len The length (in bytes) of the data to encrypt or decrypt.
+ * \param input The buffer containing the data to encrypt or decrypt.
+ * This pointer can be \c NULL if `len == 0`.
+ * \param output The buffer to where the encrypted or decrypted data is
+ * written. This must be able to hold \p len bytes.
+ * This pointer can be \c NULL if `len == 0`.
+ *
+ * \return \c 0 on success.
+ * \return #MBEDTLS_ERR_CHACHAPOLY_BAD_STATE
+ * if the operation has not been started or has been
+ * finished.
+ * \return Another negative error code on other kinds of failure.
+ */
+int mbedtls_chachapoly_update( mbedtls_chachapoly_context *ctx,
+ size_t len,
+ const unsigned char *input,
+ unsigned char *output );
+
+/**
+ * \brief This function finished the ChaCha20-Poly1305 operation and
+ * generates the MAC (authentication tag).
+ *
+ * \param ctx The ChaCha20-Poly1305 context to use. This must be initialized.
+ * \param mac The buffer to where the 128-bit (16 bytes) MAC is written.
+ *
+ * \warning Decryption with the piecewise API is discouraged, see the
+ * warning on \c mbedtls_chachapoly_init().
+ *
+ * \return \c 0 on success.
+ * \return #MBEDTLS_ERR_CHACHAPOLY_BAD_STATE
+ * if the operation has not been started or has been
+ * finished.
+ * \return Another negative error code on other kinds of failure.
+ */
+int mbedtls_chachapoly_finish( mbedtls_chachapoly_context *ctx,
+ unsigned char mac[16] );
+
+/**
+ * \brief This function performs a complete ChaCha20-Poly1305
+ * authenticated encryption with the previously-set key.
+ *
+ * \note Before using this function, you must set the key with
+ * \c mbedtls_chachapoly_setkey().
+ *
+ * \warning You must never use the same nonce twice with the same key.
+ * This would void any confidentiality and authenticity
+ * guarantees for the messages encrypted with the same nonce
+ * and key.
+ *
+ * \param ctx The ChaCha20-Poly1305 context to use (holds the key).
+ * This must be initialized.
+ * \param length The length (in bytes) of the data to encrypt or decrypt.
+ * \param nonce The 96-bit (12 bytes) nonce/IV to use.
+ * \param aad The buffer containing the additional authenticated
+ * data (AAD). This pointer can be \c NULL if `aad_len == 0`.
+ * \param aad_len The length (in bytes) of the AAD data to process.
+ * \param input The buffer containing the data to encrypt or decrypt.
+ * This pointer can be \c NULL if `ilen == 0`.
+ * \param output The buffer to where the encrypted or decrypted data
+ * is written. This pointer can be \c NULL if `ilen == 0`.
+ * \param tag The buffer to where the computed 128-bit (16 bytes) MAC
+ * is written. This must not be \c NULL.
+ *
+ * \return \c 0 on success.
+ * \return A negative error code on failure.
+ */
+int mbedtls_chachapoly_encrypt_and_tag( mbedtls_chachapoly_context *ctx,
+ size_t length,
+ const unsigned char nonce[12],
+ const unsigned char *aad,
+ size_t aad_len,
+ const unsigned char *input,
+ unsigned char *output,
+ unsigned char tag[16] );
+
+/**
+ * \brief This function performs a complete ChaCha20-Poly1305
+ * authenticated decryption with the previously-set key.
+ *
+ * \note Before using this function, you must set the key with
+ * \c mbedtls_chachapoly_setkey().
+ *
+ * \param ctx The ChaCha20-Poly1305 context to use (holds the key).
+ * \param length The length (in Bytes) of the data to decrypt.
+ * \param nonce The \c 96 Bit (\c 12 bytes) nonce/IV to use.
+ * \param aad The buffer containing the additional authenticated data (AAD).
+ * This pointer can be \c NULL if `aad_len == 0`.
+ * \param aad_len The length (in bytes) of the AAD data to process.
+ * \param tag The buffer holding the authentication tag.
+ * This must be a readable buffer of length \c 16 Bytes.
+ * \param input The buffer containing the data to decrypt.
+ * This pointer can be \c NULL if `ilen == 0`.
+ * \param output The buffer to where the decrypted data is written.
+ * This pointer can be \c NULL if `ilen == 0`.
+ *
+ * \return \c 0 on success.
+ * \return #MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED
+ * if the data was not authentic.
+ * \return Another negative error code on other kinds of failure.
+ */
+int mbedtls_chachapoly_auth_decrypt( mbedtls_chachapoly_context *ctx,
+ size_t length,
+ const unsigned char nonce[12],
+ const unsigned char *aad,
+ size_t aad_len,
+ const unsigned char tag[16],
+ const unsigned char *input,
+ unsigned char *output );
+
+#if defined(MBEDTLS_SELF_TEST)
+/**
+ * \brief The ChaCha20-Poly1305 checkup routine.
+ *
+ * \return \c 0 on success.
+ * \return \c 1 on failure.
+ */
+int mbedtls_chachapoly_self_test( int verbose );
+#endif /* MBEDTLS_SELF_TEST */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_CHACHAPOLY_H */