lupyuen commented on code in PR #16016: URL: https://github.com/apache/nuttx/pull/16016#discussion_r2002239506
########## arch/xtensa/src/esp32/esp32_sha.h: ########## @@ -0,0 +1,219 @@ +/**************************************************************************** + * arch/xtensa/src/esp32/esp32_sha.h + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#ifndef __ARCH_XTENSA_SRC_ESP32_ESP32_SHA_H +#define __ARCH_XTENSA_SRC_ESP32_ESP32_SHA_H + +#include <nuttx/config.h> +#include <stdint.h> + +#ifndef __ASSEMBLY__ + +#undef EXTERN +#if defined(__cplusplus) +#define EXTERN extern "C" +extern "C" +{ +#else +#define EXTERN extern +#endif + +/**************************************************************************** + * Public Types + ****************************************************************************/ + +enum esp32_sha_type_e +{ + ESP32_SHA1_1 = 0, + ESP32_SHA2_256, + ESP32_SHA3_384, + ESP32_SHA3_512, + ESP32_SHA_TYPE_MAX +}; + +enum esp32_sha_state_e +{ + ESP32_SHA_STATE_INIT, + ESP32_SHA_STATE_IN_PROCESS +}; + +/* SHA-1 context structure */ + +struct esp32_sha_context_s +{ + uint64_t count[2]; /* number of bits processed */ + uint32_t state[16]; /* intermediate digest state */ + bool final_block; + unsigned char buffer[128]; /* data block being processed */ + bool first_block; /* if first then true else false */ + uint16_t output_size; + uint16_t block_size; + enum esp32_sha_type_e mode; + enum esp32_sha_state_e sha_state; +}; + +/**************************************************************************** + * Name: esp32_sha_init + * + * Description: + * Initialize ESP32 SHA hardware. + * + * Input Parameters: + * None + * + * Returned Value: + * OK is returned on success. Otherwise, a negated errno value is returned. + * + ****************************************************************************/ + +int esp32_sha_init(void); + +/**************************************************************************** + * Name: esp32_sha1_init + * + * Description: + * Initializes a SHA context. + * + * Input Parameters: + * ctx - The SHA context to initialize + * + * Returned Value: + * None. + * + ****************************************************************************/ + +void esp32_sha1_init(struct esp32_sha_context_s *ctx); + +/**************************************************************************** + * Name: esp32_sha1_starts + * + * Description: + * Starts a SHA checksum calculation. + * + * Input Parameters: + * ctx - The SHA context to initialize + * + * Returned Value: + * OK is returned on success. + * + ****************************************************************************/ + +int esp32_sha1_starts(struct esp32_sha_context_s *ctx); + +/**************************************************************************** + * Name: esp32_sha_update + * + * Description: + * Feeds an input buffer into an ongoing SHA checksum calculation. + * + * Input Parameters: + * ctx - The SHA context to use + * input - The buffer holding the input data + * ilen - The length of the input data in Bytes + * + * Returned Value: + * OK is returned on success. + * Otherwise, a negated errno value is returned. + * + ****************************************************************************/ + +int esp32_sha_update(struct esp32_sha_context_s *ctx, + const unsigned char *input, + size_t ilen); + +/**************************************************************************** + * Name: esp32_sha_finish + * + * Description: + * Finishes the SHA operation, + * and writes the result to the output buffer. + * + * Input Parameters: + * ctx - The SHA context to use + * output - The SHA checksum result + * + * Returned Value: + * OK is returned on success. + * Otherwise, a negated errno value is returned. + * + ****************************************************************************/ + +int esp32_sha_finish(struct esp32_sha_context_s *ctx, + unsigned char output[64]); Review Comment: Same here. 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