Update makefile and readme

Author: brendan-rius

Makefile

@@ -1,24 +1,24 @@
 CC	= gcc
-RM	= rm -f
-CP	= cp
 
-CFLAGS	+= -I/usr/local/opt/openssl/include -O3
+OPENSSL = /usr/include/openssl
+
+CFLAGS	+= -I $(OPENSSL) -O3
 LDFLAGS	+= -lssl -lcrypto
 
 NAME	= jwtcrack
-SRCS	= main.c \
-	base64.c
+SRCS	= main.c base64.c
 OBJS	= $(SRCS:.c=.o)
 
 all: $(NAME)
+	@echo $(OPENSSL)
 
 $(NAME): $(OBJS)
 	$(CC) -o $(NAME) $(OBJS) $(LDFLAGS)
 
 clean:
-	$(RM) $(OBJS)
+	rm $(OBJS)
 
 fclean: clean
-	$(RM) $(NAME)
+	rm $(NAME)
 
 re: fclean all

README.md

@@ -7,17 +7,29 @@ I used the [Apple Base64 implementation](https://opensource.apple.com/source/Qui
 ## Compile
 
 Make sure you have openssl's headers installed.
+On Ubuntu youcan install them with `apt-get install libssl-dev`
 
 ```
 make
-./jwtcrack eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.cAOIAifu3fykvhkHpbuhbvtH807-Z2rI1FS3vX1XMjE
+```
+
+If you use a Mac, you can install OpenSSL with `brew install openssl`, but the headers will be stored in a
+different location:
+
+```
+make OPENSSL=/usr/local/opt/openssl/include
+```
+
+## Run
+
+```
+$ > ./jwtcrack eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.cAOIAifu3fykvhkHpbuhbvtH807-Z2rI1FS3vX1XMjE
 ```
 
 In the above example, the key is `Sn1f`. It takes approximately 23 seconds to crack on my Macbook.
 
 ## Caveats
 
  * Not multi-threaded :((
- * Letters permutation generator could be a bit faster :|
- * No progress status :(
- * If you stop the program, you cannot start back where you were :((
+ * No progress status
+ * If you stop the program, you cannot start back where you were