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-rw-r--r--src/onetimebluh.c126
1 files changed, 116 insertions, 10 deletions
diff --git a/src/onetimebluh.c b/src/onetimebluh.c
index 0823f4d..0d3d324 100644
--- a/src/onetimebluh.c
+++ b/src/onetimebluh.c
@@ -1,5 +1,6 @@
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <getopt.h>
#include <openssl/rand.h>
#include <unistd.h>
@@ -8,6 +9,7 @@
void xor(int ed, char* mess, char* keyf, char* outp); /* operates the bitwise XOR between mess and keyf and puts the output to outp */
void keyrand(int nb, char* outp); /* generates random numbers using RAND_bytes from openssl and puts them into outp */
+void bluh(int c, char* mess, char* outp); /* performs the binary dump of the input file and prints that to outp */
void help(char* av[]); /* prints the help message */
int main(int argc, char* argv[]) {
@@ -27,6 +29,7 @@ int main(int argc, char* argv[]) {
while (opt) {
int option_index = 0;
static struct option options[] = {
+ {"bluh", required_argument, 0, 'b'},
{"decrypt", required_argument, 0, 'd'},
{"encrypt", required_argument, 0, 'e'},
{"key-file", required_argument, 0, 'k'},
@@ -35,24 +38,33 @@ int main(int argc, char* argv[]) {
{"nbytes", required_argument, 0, 'n'},
{"output", required_argument, 0, 'o'},
{"tear-page", no_argument, 0, 't'},
+ {"uhbl", required_argument, 0, 'u'},
{0, 0, 0, 0},
};
- if ((opt = getopt_long(argc, argv, "d:e:ghk:n:o:t", options, &option_index)) == -1)
+ if ((opt = getopt_long(argc, argv, "b:d:e:ghk:n:o:tu:", options, &option_index)) == -1)
break;
switch (opt) {
+ case 'b':
+ message = argv[optind-1];
+ if (access(message, F_OK) == -1) { /* look at next comment */
+ error(errno, errno, message);
+ }
+ command ++;
+ comm = 'b';
+ break;
case 'd':
message = argv[optind-1];
- command++;
- comm = 'u';
+ command ++;
+ comm = 'r';
break;
case 'e':
message = argv[optind-1];
if (access(message, F_OK) == -1) { /* checks the existence of the file and eventually exits */
error(errno, errno, message);
}
- command++;
+ command ++;
comm = 'e';
break;
case 'g':
@@ -61,11 +73,11 @@ int main(int argc, char* argv[]) {
break;
case 'h':
help(argv);
- command++;
+ command ++;
break;
case 'k':
keyfile = argv[optind-1];
- if (access(keyfile, F_OK) == -1) { /* look at the comment before */
+ if (access(keyfile, F_OK) == -1) { /* look at the previous comment */
error(errno, errno, keyfile);
}
break;
@@ -78,6 +90,14 @@ int main(int argc, char* argv[]) {
case 't':
tear = 1;
break;
+ case 'u':
+ message = argv[optind-1];
+ if (access(message, F_OK) == -1) { /* just guess */
+ error(errno, errno, message);
+ }
+ command ++;
+ comm = 'u';
+ break;
case '?':
break;
default:
@@ -103,7 +123,7 @@ int main(int argc, char* argv[]) {
/* Next section detects the functions to call */
- if (comm == 'e' || comm == 'u') {
+ if (comm == 'e' || comm == 'r') {
if (keyfile == NULL) {
printf("No key specified: exit! \n");
exit(EXIT_FAILURE);
@@ -114,6 +134,8 @@ int main(int argc, char* argv[]) {
xor(comm, message, keyfile, output);
} else if (comm == 'g') {
keyrand(nbytes, output);
+ } else if (comm == 'b' || comm == 'u') {
+ bluh(comm, message, output);
}
exit(EXIT_SUCCESS);
@@ -124,13 +146,13 @@ void xor(int ed, char* mess, char* keyf, char* outp) {
char* defenoutp = "critt";
char* defdeoutp = "decritt";
- /* In absence of input by users nex block sets the default values */
+ /* In absence of input by users next block sets the default values */
if (outp == NULL) {
if (ed == 'e' || ed == 'f') {
printf("WARNING no output name specified using default value 'critt' \n");
outp = defenoutp;
- } else if (ed == 'u' || ed == 'v') {
+ } else if (ed == 'r' || ed == 's') {
printf("WARNING no output name specified usign default value 'decritt' \n");
outp = defdeoutp;
}
@@ -163,7 +185,7 @@ void xor(int ed, char* mess, char* keyf, char* outp) {
fwrite(bytes, sizeof(char), mess_size, critt);
- if (ed == 'f' || ed == 'v') {
+ if (ed == 'f' || ed == 's') {
ftruncate(fileno(keyx), (pad_size - mess_size));
fseek(keyx, 0L, SEEK_END);
long new_pad_size = ftell(keyx);
@@ -228,6 +250,90 @@ void keyrand(int nb, char* outp) {
return;
}
+void bluh(int c, char* mess, char* outp) {
+
+ char* defbluh = "bluhed";
+ char* defunbluh = "unbluhed";
+
+ /* In absence of input by users next block sets the default values */
+
+ if (outp == NULL) {
+ if (c == 'b') {
+ printf("WARNING no output name specified using default value 'bluhed' \n");
+ outp = defbluh;
+ } else if (c == 'u') {
+ printf("WARNING no output name specified usign default value 'unbluhed' \n");
+ outp = defunbluh;
+ }
+ }
+
+ FILE* mex = fopen(mess, "r");
+ FILE* bluh = fopen(outp, "w");
+
+ long len;
+
+ fseek(mex, 0L, SEEK_END);
+ len = ftell(mex);
+ rewind(mex);
+
+ if (c == 'b') {
+ char* bytes = malloc(len);
+ char* bits = malloc(8 * len);
+
+ fread(bytes, sizeof(char), len, mex);
+
+ int i,j;
+
+ for (i = 0; i < len; i ++) {
+ for (j = 0; j < 8; j ++) {
+ bits[8 * i + j] = (bytes[i] & (1 << (7 -j))) ? '1' : '0';
+ printf("%c", bits[8 * i + j]);
+ }
+
+ /* printf(" ");
+ if ((i + 1) % 8 == 0) {
+ printf("\n");
+ }*/
+ }
+
+ fwrite(bits, sizeof(char), (8 * len), bluh);
+ free(bytes);
+ free(bits);
+
+ printf("Message successfully bluhed!\n");
+
+ } else if (c == 'u') {
+ char* comp = malloc(len + 1);
+ char* bits = malloc(8 * len);
+
+ fread(bits, sizeof(char), 8 * len, mex);
+ memset(comp, 0, (len + 1));
+
+ int i, j;
+
+ for (i = 0; i < len; i ++) {
+ for (j = 0; j < 8; j ++) {
+ if (bits[8 * i + j] == '1') {
+ comp[i] |= 1 << (7 - j);
+ }
+ }
+ }
+
+ printf("\nOriginal text:\n'%s'\n", comp);
+
+ fwrite(comp, sizeof(char), (len / 8), bluh);
+ free(comp);
+ free(bits);
+
+ printf("Message successfully unbluhed!\n");
+ }
+
+ fclose(mex);
+ fclose(bluh);
+
+ return;
+}
+
void help(char* av[]) {
fprintf(stdout,"ONETIMEBLUH USAGE: \n"
"%s [COMMAND] [OPTIONS] \n \n"
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-18 01:47:23 +0000