X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/39cc1c879e3d75b3cafd79e4e139a7f6673dd349..700d8687944db0a48535f818b59b6c9859952c61:/common/mbedtls/md.h diff --git a/common/mbedtls/md.h b/common/mbedtls/md.h new file mode 100644 index 00000000..797d5ff3 --- /dev/null +++ b/common/mbedtls/md.h @@ -0,0 +1,468 @@ + /** + * \file md.h + * + * \brief This file contains the generic message-digest wrapper. + * + * \author Adriaan de Jong + */ +/* + * Copyright (C) 2006-2018, Arm Limited (or its affiliates), 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_MD_H +#define MBEDTLS_MD_H + +#include + +#if !defined(MBEDTLS_CONFIG_FILE) +#include "config.h" +#else +#include MBEDTLS_CONFIG_FILE +#endif + +#define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE -0x5080 /**< The selected feature is not available. */ +#define MBEDTLS_ERR_MD_BAD_INPUT_DATA -0x5100 /**< Bad input parameters to function. */ +#define MBEDTLS_ERR_MD_ALLOC_FAILED -0x5180 /**< Failed to allocate memory. */ +#define MBEDTLS_ERR_MD_FILE_IO_ERROR -0x5200 /**< Opening or reading of file failed. */ +#define MBEDTLS_ERR_MD_HW_ACCEL_FAILED -0x5280 /**< MD hardware accelerator failed. */ + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief Supported message digests. + * + * \warning MD2, MD4, MD5 and SHA-1 are considered weak message digests and + * their use constitutes a security risk. We recommend considering + * stronger message digests instead. + * + */ +typedef enum { + MBEDTLS_MD_NONE=0, /**< None. */ + MBEDTLS_MD_MD2, /**< The MD2 message digest. */ + MBEDTLS_MD_MD4, /**< The MD4 message digest. */ + MBEDTLS_MD_MD5, /**< The MD5 message digest. */ + MBEDTLS_MD_SHA1, /**< The SHA-1 message digest. */ + MBEDTLS_MD_SHA224, /**< The SHA-224 message digest. */ + MBEDTLS_MD_SHA256, /**< The SHA-256 message digest. */ + MBEDTLS_MD_SHA384, /**< The SHA-384 message digest. */ + MBEDTLS_MD_SHA512, /**< The SHA-512 message digest. */ + MBEDTLS_MD_RIPEMD160, /**< The RIPEMD-160 message digest. */ +} mbedtls_md_type_t; + +#if defined(MBEDTLS_SHA512_C) +#define MBEDTLS_MD_MAX_SIZE 64 /* longest known is SHA512 */ +#else +#define MBEDTLS_MD_MAX_SIZE 32 /* longest known is SHA256 or less */ +#endif + +/** + * Opaque struct defined in md_internal.h. + */ +typedef struct mbedtls_md_info_t mbedtls_md_info_t; + +/** + * The generic message-digest context. + */ +typedef struct mbedtls_md_context_t +{ + /** Information about the associated message digest. */ + const mbedtls_md_info_t *md_info; + + /** The digest-specific context. */ + void *md_ctx; + + /** The HMAC part of the context. */ + void *hmac_ctx; +} mbedtls_md_context_t; + +/** + * \brief This function returns the list of digests supported by the + * generic digest module. + * + * \return A statically allocated array of digests. Each element + * in the returned list is an integer belonging to the + * message-digest enumeration #mbedtls_md_type_t. + * The last entry is 0. + */ +const int *mbedtls_md_list( void ); + +/** + * \brief This function returns the message-digest information + * associated with the given digest name. + * + * \param md_name The name of the digest to search for. + * + * \return The message-digest information associated with \p md_name. + * \return NULL if the associated message-digest information is not found. + */ +const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name ); + +/** + * \brief This function returns the message-digest information + * associated with the given digest type. + * + * \param md_type The type of digest to search for. + * + * \return The message-digest information associated with \p md_type. + * \return NULL if the associated message-digest information is not found. + */ +const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type ); + +/** + * \brief This function initializes a message-digest context without + * binding it to a particular message-digest algorithm. + * + * This function should always be called first. It prepares the + * context for mbedtls_md_setup() for binding it to a + * message-digest algorithm. + */ +void mbedtls_md_init( mbedtls_md_context_t *ctx ); + +/** + * \brief This function clears the internal structure of \p ctx and + * frees any embedded internal structure, but does not free + * \p ctx itself. + * + * If you have called mbedtls_md_setup() on \p ctx, you must + * call mbedtls_md_free() when you are no longer using the + * context. + * Calling this function if you have previously + * called mbedtls_md_init() and nothing else is optional. + * You must not call this function if you have not called + * mbedtls_md_init(). + */ +void mbedtls_md_free( mbedtls_md_context_t *ctx ); + +#if ! defined(MBEDTLS_DEPRECATED_REMOVED) +#if defined(MBEDTLS_DEPRECATED_WARNING) +#define MBEDTLS_DEPRECATED __attribute__((deprecated)) +#else +#define MBEDTLS_DEPRECATED +#endif +/** + * \brief This function selects the message digest algorithm to use, + * and allocates internal structures. + * + * It should be called after mbedtls_md_init() or mbedtls_md_free(). + * Makes it necessary to call mbedtls_md_free() later. + * + * \deprecated Superseded by mbedtls_md_setup() in 2.0.0 + * + * \param ctx The context to set up. + * \param md_info The information structure of the message-digest algorithm + * to use. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + * \return #MBEDTLS_ERR_MD_ALLOC_FAILED on memory-allocation failure. + */ +int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info ) MBEDTLS_DEPRECATED; +#undef MBEDTLS_DEPRECATED +#endif /* MBEDTLS_DEPRECATED_REMOVED */ + +/** + * \brief This function selects the message digest algorithm to use, + * and allocates internal structures. + * + * It should be called after mbedtls_md_init() or + * mbedtls_md_free(). Makes it necessary to call + * mbedtls_md_free() later. + * + * \param ctx The context to set up. + * \param md_info The information structure of the message-digest algorithm + * to use. + * \param hmac Defines if HMAC is used. 0: HMAC is not used (saves some memory), + * or non-zero: HMAC is used with this context. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + * \return #MBEDTLS_ERR_MD_ALLOC_FAILED on memory-allocation failure. + */ +int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac ); + +/** + * \brief This function clones the state of an message-digest + * context. + * + * \note You must call mbedtls_md_setup() on \c dst before calling + * this function. + * + * \note The two contexts must have the same type, + * for example, both are SHA-256. + * + * \warning This function clones the message-digest state, not the + * HMAC state. + * + * \param dst The destination context. + * \param src The context to be cloned. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification failure. + */ +int mbedtls_md_clone( mbedtls_md_context_t *dst, + const mbedtls_md_context_t *src ); + +/** + * \brief This function extracts the message-digest size from the + * message-digest information structure. + * + * \param md_info The information structure of the message-digest algorithm + * to use. + * + * \return The size of the message-digest output in Bytes. + */ +unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info ); + +/** + * \brief This function extracts the message-digest type from the + * message-digest information structure. + * + * \param md_info The information structure of the message-digest algorithm + * to use. + * + * \return The type of the message digest. + */ +mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info ); + +/** + * \brief This function extracts the message-digest name from the + * message-digest information structure. + * + * \param md_info The information structure of the message-digest algorithm + * to use. + * + * \return The name of the message digest. + */ +const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info ); + +/** + * \brief This function starts a message-digest computation. + * + * You must call this function after setting up the context + * with mbedtls_md_setup(), and before passing data with + * mbedtls_md_update(). + * + * \param ctx The generic message-digest context. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + */ +int mbedtls_md_starts( mbedtls_md_context_t *ctx ); + +/** + * \brief This function feeds an input buffer into an ongoing + * message-digest computation. + * + * You must call mbedtls_md_starts() before calling this + * function. You may call this function multiple times. + * Afterwards, call mbedtls_md_finish(). + * + * \param ctx The generic message-digest context. + * \param input The buffer holding the input data. + * \param ilen The length of the input data. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + */ +int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen ); + +/** + * \brief This function finishes the digest operation, + * and writes the result to the output buffer. + * + * Call this function after a call to mbedtls_md_starts(), + * followed by any number of calls to mbedtls_md_update(). + * Afterwards, you may either clear the context with + * mbedtls_md_free(), or call mbedtls_md_starts() to reuse + * the context for another digest operation with the same + * algorithm. + * + * \param ctx The generic message-digest context. + * \param output The buffer for the generic message-digest checksum result. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + */ +int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output ); + +/** + * \brief This function calculates the message-digest of a buffer, + * with respect to a configurable message-digest algorithm + * in a single call. + * + * The result is calculated as + * Output = message_digest(input buffer). + * + * \param md_info The information structure of the message-digest algorithm + * to use. + * \param input The buffer holding the data. + * \param ilen The length of the input data. + * \param output The generic message-digest checksum result. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + */ +int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen, + unsigned char *output ); + +#if defined(MBEDTLS_FS_IO) +/** + * \brief This function calculates the message-digest checksum + * result of the contents of the provided file. + * + * The result is calculated as + * Output = message_digest(file contents). + * + * \param md_info The information structure of the message-digest algorithm + * to use. + * \param path The input file name. + * \param output The generic message-digest checksum result. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_FILE_IO_ERROR on an I/O error accessing + * the file pointed by \p path. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA if \p md_info was NULL. + */ +int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path, + unsigned char *output ); +#endif /* MBEDTLS_FS_IO */ + +/** + * \brief This function sets the HMAC key and prepares to + * authenticate a new message. + * + * Call this function after mbedtls_md_setup(), to use + * the MD context for an HMAC calculation, then call + * mbedtls_md_hmac_update() to provide the input data, and + * mbedtls_md_hmac_finish() to get the HMAC value. + * + * \param ctx The message digest context containing an embedded HMAC + * context. + * \param key The HMAC secret key. + * \param keylen The length of the HMAC key in Bytes. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + */ +int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key, + size_t keylen ); + +/** + * \brief This function feeds an input buffer into an ongoing HMAC + * computation. + * + * Call mbedtls_md_hmac_starts() or mbedtls_md_hmac_reset() + * before calling this function. + * You may call this function multiple times to pass the + * input piecewise. + * Afterwards, call mbedtls_md_hmac_finish(). + * + * \param ctx The message digest context containing an embedded HMAC + * context. + * \param input The buffer holding the input data. + * \param ilen The length of the input data. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + */ +int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input, + size_t ilen ); + +/** + * \brief This function finishes the HMAC operation, and writes + * the result to the output buffer. + * + * Call this function after mbedtls_md_hmac_starts() and + * mbedtls_md_hmac_update() to get the HMAC value. Afterwards + * you may either call mbedtls_md_free() to clear the context, + * or call mbedtls_md_hmac_reset() to reuse the context with + * the same HMAC key. + * + * \param ctx The message digest context containing an embedded HMAC + * context. + * \param output The generic HMAC checksum result. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + */ +int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output); + +/** + * \brief This function prepares to authenticate a new message with + * the same key as the previous HMAC operation. + * + * You may call this function after mbedtls_md_hmac_finish(). + * Afterwards call mbedtls_md_hmac_update() to pass the new + * input. + * + * \param ctx The message digest context containing an embedded HMAC + * context. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + */ +int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx ); + +/** + * \brief This function calculates the full generic HMAC + * on the input buffer with the provided key. + * + * The function allocates the context, performs the + * calculation, and frees the context. + * + * The HMAC result is calculated as + * output = generic HMAC(hmac key, input buffer). + * + * \param md_info The information structure of the message-digest algorithm + * to use. + * \param key The HMAC secret key. + * \param keylen The length of the HMAC secret key in Bytes. + * \param input The buffer holding the input data. + * \param ilen The length of the input data. + * \param output The generic HMAC result. + * + * \return \c 0 on success. + * \return #MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter-verification + * failure. + */ +int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key, size_t keylen, + const unsigned char *input, size_t ilen, + unsigned char *output ); + +/* Internal use */ +int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data ); + +#ifdef __cplusplus +} +#endif + +#endif /* MBEDTLS_MD_H */