Create ecat based on a lib archive

Signed-off-by: Carlos Maiolino <[email protected]>

13 files changed, 123 insertions, 0 deletions

diff --git a/C/HF/chap8/Makefile b/C/HF/chap8/Makefile
new file mode 100644
index 0000000..df3283e
--- /dev/null
+++ b/C/HF/chap8/Makefile
@@ -0,0 +1,15 @@
+LIBS_DIR=./src/libs
+INCLUDE_DIR=./include
+
+ecat: bin/libs/libencrypt.a
+	cc -I $(INCLUDE_DIR) -L bin/libs -o bin/ecat src/ecat.c -lencrypt
+
+# Create a lib archive
+bin/libs/libencrypt.a: bin/libs/xor.o bin/libs/encrypt.o
+	ar -rcs bin/libs/libencrypt.a bin/libs/xor.o bin/libs/encrypt.o
+
+bin/libs/xor.o: $(INCLUDE_DIR)/libs/xor.h src/libs/xor.c
+	cc -I $(INCLUDE_DIR) -c src/libs/xor.c -o bin/libs/xor.o
+
+bin/libs/encrypt.o: $(INCLUDE_DIR)/libs/encrypt.h src/libs/encrypt.c
+	cc -I $(INCLUDE_DIR) -c src/libs/encrypt.c -o bin/libs/encrypt.o
diff --git a/C/HF/chap8/bin/ecat b/C/HF/chap8/bin/ecat
new file mode 100755
index 0000000..1167d31
--- /dev/null
+++ b/C/HF/chap8/bin/ecat
diff --git a/C/HF/chap8/bin/libs/libencrypt.a b/C/HF/chap8/bin/libs/libencrypt.a
new file mode 100644
index 0000000..f609c17
--- /dev/null
+++ b/C/HF/chap8/bin/libs/libencrypt.a
diff --git a/C/HF/chap8/include/libs/encrypt.h b/C/HF/chap8/include/libs/encrypt.h
new file mode 100644
index 0000000..e70d8f6
--- /dev/null
+++ b/C/HF/chap8/include/libs/encrypt.h
@@ -0,0 +1,10 @@
+#ifndef ENCRYPT_H
+#define ENCRYPT_H
+
+typedef void (*encrypt_fn_t)(char *message);
+typedef void (*encrypt_arr_t[])(char *message);
+
+void encrypt(char *message, encrypt_fn_t);
+void encrypt_arr(char *message, encrypt_arr_t fn_arr, int size);
+
+#endif /* ENCRYPT_H */
diff --git a/C/HF/chap8/include/libs/xor.h b/C/HF/chap8/include/libs/xor.h
new file mode 100644
index 0000000..8dd8e17
--- /dev/null
+++ b/C/HF/chap8/include/libs/xor.h
@@ -0,0 +1,8 @@
+#ifndef XOR_H
+#define XOR_H
+
+void xor16(char *m);
+void xor42(char *m);
+void xor64(char *m);
+
+#endif
diff --git a/C/HF/chap8/ls.txt b/C/HF/chap8/ls.txt
new file mode 100644
index 0000000..928beb3
--- /dev/null
+++ b/C/HF/chap8/ls.txt
@@ -0,0 +1 @@
+
J
diff --git a/C/HF/chap8/res.txt b/C/HF/chap8/res.txt
new file mode 100644
index 0000000..9d96016
--- /dev/null
+++ b/C/HF/chap8/res.txt
@@ -0,0 +1 @@
+"/6
diff --git a/C/HF/chap8/src/ecat.c b/C/HF/chap8/src/ecat.c
new file mode 100644
index 0000000..9be8a47
--- /dev/null
+++ b/C/HF/chap8/src/ecat.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <libs/xor.h>
+#include <libs/encrypt.h>
+
+int main(int argc, char **argv)
+{
+	FILE *fd;
+	char buf[80];
+
+	char f = '\0';
+
+	encrypt_arr_t fn_arr = {xor16, xor42, xor64};
+	if (argc != 2)
+		return 1;
+
+	printf("Arr size: %ld\n", sizeof(fn_arr) / sizeof(*fn_arr));
+	fd = fopen(argv[1], "r");
+
+	while (fgets(buf, 80, fd)) {
+		encrypt_arr(buf, fn_arr, 3);
+		printf("encrypted message: '%s'", buf);
+	}
+
+	printf("\n");
+
+	printf("%c", (char)(f ^ 16 ^ 42 ^ 64));
+	fclose(fd);
+	return 0;
+}
diff --git a/C/HF/chap8/src/libs/encrypt.c b/C/HF/chap8/src/libs/encrypt.c
new file mode 100644
index 0000000..d894cfc
--- /dev/null
+++ b/C/HF/chap8/src/libs/encrypt.c
@@ -0,0 +1,13 @@
+#include <libs/encrypt.h>
+
+void encrypt(char *message, encrypt_fn_t encrypt_fn) {
+	encrypt_fn(message);
+}
+
+void encrypt_arr(char *message, encrypt_arr_t fn_arr, int size)
+{
+	int i;
+
+	for (i = 0; i < size; i++)
+		encrypt(message, fn_arr[i]);
+}
diff --git a/C/HF/chap8/src/libs/xor.c b/C/HF/chap8/src/libs/xor.c
new file mode 100644
index 0000000..30286e7
--- /dev/null
+++ b/C/HF/chap8/src/libs/xor.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <libs/xor.h>
+
+void xor16(char *message)
+{
+	printf("Orig: %s\n", message);
+	while (*message) {
+		*message = *message ^ 16;
+		message++;
+	}
+}
+
+void xor42(char *message)
+{
+	printf("Orig: %s\n", message);
+	while (*message) {
+		*message = *message ^ 42;
+		message++;
+	}
+}
+
+void xor64(char *message)
+{
+	printf("Orig: %s\n", message);
+	while (*message) {
+		*message = *message ^ 64;
+		message++;
+	}
+}
+
diff --git a/C/HF/chap8/src/message.c b/C/HF/chap8/src/message.c
new file mode 100644
index 0000000..345774c
--- /dev/null
+++ b/C/HF/chap8/src/message.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include "encrypt.h"
+
+int main(void)
+{
+	char msg[80];
+	while (fgets(msg, 80, stdin)) {
+		encrypt(msg);
+		printf("%s\n", msg);
+	}
+
+	return 0;
+}
diff --git a/C/HF/chap8/text.txt b/C/HF/chap8/text.txt
new file mode 100644
index 0000000..935e3ea
--- /dev/null
+++ b/C/HF/chap8/text.txt
@@ -0,0 +1 @@
+XULA
diff --git a/C/HF/chap8/v2.txt b/C/HF/chap8/v2.txt
new file mode 100644
index 0000000..7c3b204
--- /dev/null
+++ b/C/HF/chap8/v2.txt
@@ -0,0 +1,2 @@
+RONALDO
+p