cryptest

commit fd020e0e94b09bf3a54693470cf28a85245f6aab
parent 754551b924853a600a3cefa96619f31ac11d9842
Author: finwo <finwo@pm.me>
Date:   Tue,  8 Aug 2017 22:21:08 +0200

command switches

Diffstat:
M
configure
 | 
2
+-
M
inc/base.h
 | 
4
++++
A
src/decrypt.c
 | 
13
+++++++++++++
A
src/encrypt.c
 | 
13
+++++++++++++
M
src/main.c
 | 
55
++++++++++++++++++++++++++++++++++++++++++++++++++++++-
A
src/sign.c
 | 
13
+++++++++++++

6 files changed, 98 insertions(+), 2 deletions(-)
diff --git a/configure b/configure
@@ -20,7 +20,7 @@ FCC=$(command -v musl-gcc gcc 2>/dev/null | head -1)
 
 echo " - C flags"
 echo "CFLAGS :=" >> Makefile
-command -v gcc &>/dev/null && echo "CFLAGS += -O3 -s" >> Makefile
+command -v gcc &>/dev/null && echo "CFLAGS += -Os -s" >> Makefile
 echo "CFLAGS += -I inc" >> Makefile
 
 echo " - Other variables"
diff --git a/inc/base.h b/inc/base.h
@@ -2,6 +2,10 @@
 extern "C" {
 #endif
 
+int encrypt( unsigned int mult, unsigned int modulo, unsigned int padding );
+int decrypt( unsigned int mult, unsigned int modulo, unsigned int padding );
+int sign( unsigned int mult, unsigned int modulo, unsigned int padding );
+
 #ifdef __cplusplus
 } // extern "C"
 #endif
diff --git a/src/decrypt.c b/src/decrypt.c
@@ -0,0 +1,13 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "base.h"
+
+int decrypt( unsigned int mult, unsigned int modulo, unsigned int padding ) {
+
+}
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
diff --git a/src/encrypt.c b/src/encrypt.c
@@ -0,0 +1,13 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "base.h"
+
+int encrypt( unsigned int mult, unsigned int modulo, unsigned int padding ) {
+
+}
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
diff --git a/src/main.c b/src/main.c
@@ -2,12 +2,65 @@
 extern "C" {
 #endif
 
+#include <stdio.h>
+#include <unistd.h>
+
 #include "base.h"
 
-int main( int argc, char **argv ) {
+int usage( char *name ) {
+  fprintf(stderr, "Usage:\n");
+  fprintf(stderr, "  %s -h\n", name);
+  fprintf(stderr, "  %s [-e|-d] [-t mul] [-m mod] [-p pad]\n", name);
+  fprintf(stderr, "  %s -s [-t mul] [-m mod]\n", name);
+  fprintf(stderr, "Options:\n");
+  fprintf(stderr, "  -d  Decrypt stdin\n");
+  fprintf(stderr, "  -e  Encrypt stdin\n");
+  fprintf(stderr, "  -h  Show this usage\n");
+  fprintf(stderr, "  -s  Output sign for stdin\n");
+  fprintf(stderr, "  -t  Set the multiplicand (default: 13)\n");
+  fprintf(stderr, "  -m  Set the modulo (default: 557)\n");
+  fprintf(stderr, "  -p  Set the padding in bytes (default: 1)\n");
   return 0;
 }
 
+int main( int argc, char **argv ) {
+  int opt;
+
+  unsigned int mult = 13, modulo = 557, padding = 1;
+  char mode = 0;
+  
+  while((opt=getopt(argc,argv,"edsht:m:p:"))!=-1) {
+    switch(opt) {
+      case 'e':
+        mode = 1;
+        break;
+      case 'd':
+        mode = 2;
+        break;
+      case 's':
+        mode = 3;
+        break;
+      case 't':
+      case 'm':
+      case 'p':
+      case 'h':
+        return usage( *argv );
+      default:
+        fprintf(stderr,"Run '%s -h' for usage.\n", *argv);
+        return 1;
+    }
+  }
+
+  switch(mode) {
+    case 1: return encrypt( mult, modulo, padding );
+    case 2: return decrypt( mult, modulo, padding );
+    case 3: return sign( mult, modulo, padding );
+  }
+
+  usage( *argv );
+  return 2;
+}
+
 #ifdef __cplusplus
 } // extern "C"
 #endif
diff --git a/src/sign.c b/src/sign.c
@@ -0,0 +1,13 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "base.h"
+
+int sign( unsigned int mult, unsigned int modulo, unsigned int padding ) {
+
+}
+
+#ifdef __cplusplus
+} // extern "C"
+#endif