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//
// Created by jhunk on 12/20/19.
//
#include "spm.h"
#include <openssl/md5.h>
#include <openssl/sha.h>
char *md5sum(const char *filename) {
size_t bytes = 0;
unsigned char digest[MD5_DIGEST_LENGTH];
char buf[BUFSIZ];
MD5_CTX context;
MD5_Init(&context);
FILE *fp = fopen(filename, "r");
if (!fp) {
perror(filename);
return NULL;
}
char *result = calloc((MD5_DIGEST_LENGTH * 2) + 1, sizeof(char));
if (!result) {
perror("MD5 result");
return NULL;
}
while ((bytes = fread(buf, sizeof(char), BUFSIZ, fp)) != 0) {
MD5_Update(&context, buf, bytes);
}
fclose(fp);
MD5_Final(digest, &context);
char *rtmp = result;
for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
snprintf(&rtmp[i * 2], 3, "%02x", digest[i]);
}
return result;
}
char *sha256sum(const char *filename) {
size_t bytes = 0;
unsigned char digest[SHA256_DIGEST_LENGTH];
char buf[BUFSIZ];
SHA256_CTX context;
SHA256_Init(&context);
FILE *fp = fopen(filename, "r");
if (!fp) {
perror(filename);
return NULL;
}
char *result = calloc((SHA256_DIGEST_LENGTH * 2) + 1, sizeof(char));
if (!result) {
perror("SHA256 result");
return NULL;
}
while ((bytes = fread(buf, sizeof(char), BUFSIZ, fp)) != 0) {
SHA256_Update(&context, buf, bytes);
}
fclose(fp);
SHA256_Final(digest, &context);
char *rtmp = result;
for (int i = 0; i < SHA256_DIGEST_LENGTH; i++) {
snprintf(&rtmp[i * 2], 3, "%02x", digest[i]);
}
return result;
}
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