40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* =====================================================================================
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*
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* Filename: sha256.c
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*
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* Description: An OpenSSL SHA256 Utility
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*
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* Version: 1.0
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* Created: 04/03/2018 06:13:41 PM
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* Revision: none
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* Compiler: gcc
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*
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* Author: William Brawner (Billy), billybrawner@gmail.com
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* Organization:
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*
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* =====================================================================================
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*/
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#include <openssl/evp.h>
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#include <stdlib.h>
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#include <string.h>
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#include "helper.h"
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int main(int argc, char ** argv) {
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if (argc < 2) {
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printf("Please enter a string to hash\n");
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return 1;
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}
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printf("You entered %s\n", argv[1]);
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printf("Your string contains %d characters\n", strlen(argv[1]));
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EVP_MD_CTX *ctx = EVP_MD_CTX_new();
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EVP_DigestInit(ctx, EVP_sha256());
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EVP_DigestUpdate(ctx, argv[1], strlen(argv[1]));
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char* hash = malloc(EVP_MD_CTX_size(ctx));
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EVP_DigestFinal(ctx, hash, NULL);
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printf("Your hashed string: ");
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print_hex_buf(hash, 32);
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printf("\n");
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}
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