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66b0be4f32
5 changed files with 94 additions and 0 deletions
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cmake_minimum_required(VERSION 3.20.2) |
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project(streamhash C) |
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find_package(OpenSSL REQUIRED) |
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add_executable(${PROJECT_NAME} main.c) |
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target_link_libraries(${PROJECT_NAME} OpenSSL::SSL) |
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MIT License |
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Copyright (c) 2021 blank X |
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Permission is hereby granted, free of charge, to any person obtaining a copy |
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of this software and associated documentation files (the "Software"), to deal |
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in the Software without restriction, including without limitation the rights |
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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copies of the Software, and to permit persons to whom the Software is |
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furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included in all |
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copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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SOFTWARE. |
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#!/bin/sh |
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test "$1" = "debug" && TYPE="Debug" || TYPE="Release" |
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echo "Building in $TYPE" |
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cmake -S . -B builddir -D CMAKE_BUILD_TYPE=$TYPE && cd builddir && cmake --build . --config "$TYPE" |
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#include <stdio.h> |
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#include <openssl/evp.h> |
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#include <openssl/err.h> |
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#define CHUNK_SIZE 8 * 1024 |
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int main(int argc, char *argv[]) { |
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if (argc == 0) { |
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fprintf(stderr, "Usage: streamhash <algorithm>\n"); |
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return 1; |
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} |
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if (argc != 2) { |
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fprintf(stderr, "Usage: %s <algorithm>\n", argv[0]); |
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return 1; |
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} |
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const EVP_MD *type = EVP_get_digestbyname(argv[1]); |
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if (!type) { |
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fprintf(stderr, "Invalid algorithm: %s\n", argv[1]); |
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return 1; |
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} |
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EVP_MD_CTX *ctx = EVP_MD_CTX_new(); |
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if (EVP_DigestInit(ctx, type) != 1) { |
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ERR_print_errors_fp(stderr); |
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return 1; |
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} |
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char chunk[CHUNK_SIZE]; |
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char loop = 1; |
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while (loop) { |
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size_t size = fread(chunk, 1, CHUNK_SIZE, stdin); |
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if (size != CHUNK_SIZE) { |
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if (feof(stdin)) |
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loop = 0; |
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else { |
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EVP_MD_CTX_free(ctx); |
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perror("fread"); |
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return 1; |
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} |
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} |
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if (fwrite(chunk, 1, size, stdout) != size) { |
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EVP_MD_CTX_free(ctx); |
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perror("fwrite"); |
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return 1; |
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} |
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if (EVP_DigestUpdate(ctx, chunk, size) != 1) { |
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EVP_MD_CTX_free(ctx); |
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ERR_print_errors_fp(stderr); |
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return 1; |
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} |
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} |
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unsigned char md[EVP_MAX_MD_SIZE]; |
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unsigned int size; |
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if (EVP_DigestFinal(ctx, md, &size) != 1) { |
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ERR_print_errors_fp(stderr); |
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EVP_MD_CTX_free(ctx); |
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return 1; |
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} |
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for (unsigned int i=0; i < size; i++) |
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fprintf(stderr, "%02x", md[i]); |
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fprintf(stderr, "\n"); |
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return 0; |
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} |
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