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#include "conf-update.h"
bool user_modified(char *file) {
FILE *indexpipe, *filepipe;
char *line = NULL;
char *filedump = NULL;
size_t len = 0, len2 = 0;
char *md5sum;
unsigned char filemd5[MD5_DIGEST_LENGTH];
char hexdigest[32];
bool user_mod = TRUE;
if (access(MD5SUM_INDEX, R_OK) != 0) {
return TRUE;
} else {
indexpipe = fopen(MD5SUM_INDEX, "r");
exit_error(indexpipe, MD5SUM_INDEX);
while (getline(&line, &len, indexpipe) != -1) {
if (!strncmp(line, file, strlen(file)) && *(line + strlen(file)) == ' ') {
md5sum = strrchr(line, ' ') + 1;
filepipe = fopen(file, "r");
exit_error(filepipe, file);
if (getdelim(&filedump, &len2, EOF, filepipe) != -1) {
MD5((unsigned char *)filedump, strlen(filedump), filemd5);
md52hex(filemd5, hexdigest);
if (!strncmp(md5sum, hexdigest, 32)) {
user_mod = FALSE;
}
}
fclose(filepipe);
free(filedump);
}
}
fclose(indexpipe);
free(line);
return user_mod;
}
}
void md52hex(unsigned char *md5sum, char *hexdigest) {
// this one is stolen from python's md5module.c
char c;
int i, j = 0;
for(i=0; i<16; i++) {
c = (md5sum[i] >> 4) & 0xf;
hexdigest[j] = (c>9) ? c+'a'-10 : c + '0';
j++;
c = (md5sum[i] & 0xf);
hexdigest[j] = (c>9) ? c+'a'-10 : c + '0';
j++;
}
}
void calc_md5(char *file, char* hexdigest) {
FILE *fp;
char *dump = NULL;
size_t len = 0;
unsigned char md5sum[MD5_DIGEST_LENGTH];
fp = fopen(file, "r");
if (getdelim(&dump, &len, EOF, fp) != -1) {
MD5((unsigned char *)dump, strlen(dump), md5sum);
md52hex(md5sum, hexdigest);
free(dump);
}
fclose(fp);
}
void md5sum_update(char *file, char *hexdigest) {
FILE *oldpipe;
char *dump = NULL;
size_t len = 0;
char *entry;
oldpipe = fopen(MD5SUM_INDEX, "r");
exit_error(oldpipe, MD5SUM_INDEX);
if ((getdelim(&dump, &len, EOF, oldpipe) != -1) && (entry = strstr(dump, file))) {
entry = strchr(entry, '\n') - 32;
strncpy(entry, hexdigest, 32);
exit_error(freopen(MD5SUM_INDEX, "w", oldpipe), MD5SUM_INDEX);
exit_error(fwrite(dump, strlen(dump), sizeof(char), oldpipe), MD5SUM_INDEX);
} else {
// there's no entry at all yet
exit_error(freopen(MD5SUM_INDEX, "a", oldpipe), MD5SUM_INDEX);
exit_error(fwrite(file, strlen(file), sizeof(char), oldpipe), MD5SUM_INDEX);
exit_error(fwrite(" ", strlen(" "), sizeof(char), oldpipe), MD5SUM_INDEX);
exit_error(fwrite(hexdigest, 32, sizeof(char), oldpipe), MD5SUM_INDEX);
exit_error(fwrite("\n", strlen("\n"), sizeof(char), oldpipe), MD5SUM_INDEX);
}
free(dump);
fclose(oldpipe);
}
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