--- pgp/rsaref/rdemo/rdemo.c	2018/04/24 16:40:41	1.1.1.1
+++ pgp/rsaref/rdemo/rdemo.c	2018/04/24 16:41:36	1.1.1.2
@@ -1,1121 +1,1064 @@
-/* RDEMO.C - RSAREF demonstration program
- */
-
-/* Copyright (C) 1991-4 RSA Laboratories, a division of RSA Data
-   Security, Inc. All rights reserved.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include "global.h"
-#include "rsaref.h"
-
-int main PROTO_LIST ((int, char **));
-static int SetOptions PROTO_LIST ((int, char **));
-static void InitRandomStruct PROTO_LIST ((R_RANDOM_STRUCT *));
-static void DoSignFile PROTO_LIST ((void));
-static void DoVerifyFile PROTO_LIST ((void));
-static void DoSealFile PROTO_LIST ((R_RANDOM_STRUCT *));
-static void DoOpenFile PROTO_LIST ((void));
-static void DoGenerateKeys PROTO_LIST ((R_RANDOM_STRUCT *));
-static void WriteKeypair3 PROTO_LIST ((void));
-static void WriteBigInteger PROTO_LIST
-  ((FILE *, unsigned char *, unsigned int));
-static int ReadInit PROTO_LIST ((FILE **, char *));
-static int ReadUpdate PROTO_LIST
-  ((FILE *, unsigned char *, unsigned int *, unsigned int));
-static void ReadFinal PROTO_LIST ((FILE *));
-static int ReadBlock PROTO_LIST
-  ((unsigned char *, unsigned int *, unsigned int, char *));
-static int WriteInit PROTO_LIST ((FILE **, char *));
-static int WriteUpdate PROTO_LIST ((FILE *, unsigned char *, unsigned int));
-static void WriteFinal PROTO_LIST ((FILE *));
-static int WriteBlock PROTO_LIST ((unsigned char *, unsigned int, char *));
-static int GetPublicKey PROTO_LIST ((R_RSA_PUBLIC_KEY **));
-static int GetPrivateKey PROTO_LIST ((R_RSA_PRIVATE_KEY **));
-static int GetDigestAlgorithm PROTO_LIST ((int *));
-static int GetEncryptionAlgorithm PROTO_LIST ((int *));
-static void PrintMessage PROTO_LIST ((char *));
-static void PrintError PROTO_LIST ((char *, int));
-static void GetCommand PROTO_LIST ((char *, unsigned int, char *));
-
-static int SILENT_PROMPT = 0;
-
-static R_RSA_PUBLIC_KEY PUBLIC_KEY1 = {
-  512,
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0xc0, 0x76, 0x47, 0x97, 0xb8, 0xbe, 0xc8, 0x97,
-   0x2a, 0x0e, 0xd8, 0xc9, 0x0a, 0x8c, 0x33, 0x4d, 0xd0, 0x49, 0xad, 0xd0,
-   0x22, 0x2c, 0x09, 0xd2, 0x0b, 0xe0, 0xa7, 0x9e, 0x33, 0x89, 0x10, 0xbc,
-   0xae, 0x42, 0x20, 0x60, 0x90, 0x6a, 0xe0, 0x22, 0x1d, 0xe3, 0xf3, 0xfc,
-   0x74, 0x7c, 0xcf, 0x98, 0xae, 0xcc, 0x85, 0xd6, 0xed, 0xc5, 0x2d, 0x93,
-   0xd5, 0xb7, 0x39, 0x67, 0x76, 0x16, 0x05, 0x25},
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01}
-};
-
-static R_RSA_PRIVATE_KEY PRIVATE_KEY1 = {
-  512,
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0xc0, 0x76, 0x47, 0x97, 0xb8, 0xbe, 0xc8, 0x97,
-   0x2a, 0x0e, 0xd8, 0xc9, 0x0a, 0x8c, 0x33, 0x4d, 0xd0, 0x49, 0xad, 0xd0,
-   0x22, 0x2c, 0x09, 0xd2, 0x0b, 0xe0, 0xa7, 0x9e, 0x33, 0x89, 0x10, 0xbc,
-   0xae, 0x42, 0x20, 0x60, 0x90, 0x6a, 0xe0, 0x22, 0x1d, 0xe3, 0xf3, 0xfc,
-   0x74, 0x7c, 0xcf, 0x98, 0xae, 0xcc, 0x85, 0xd6, 0xed, 0xc5, 0x2d, 0x93,
-   0xd5, 0xb7, 0x39, 0x67, 0x76, 0x16, 0x05, 0x25},
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01},
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x1a, 0xe3, 0x6b, 0x75, 0x22, 0xf6, 0x64, 0x87,
-   0xd9, 0xf4, 0x61, 0x0d, 0x15, 0x50, 0x29, 0x0a, 0xc2, 0x02, 0xc9, 0x29,
-   0xbe, 0xdc, 0x70, 0x32, 0xcc, 0x3e, 0x02, 0xac, 0xf3, 0x7e, 0x3e, 0xbc,
-   0x1f, 0x86, 0x6e, 0xe7, 0xef, 0x7a, 0x08, 0x68, 0xd2, 0x3a, 0xe2, 0xb1,
-   0x84, 0xc1, 0xab, 0xd6, 0xd4, 0xdb, 0x8e, 0xa9, 0xbe, 0xc0, 0x46, 0xbd,
-   0x82, 0x80, 0x37, 0x27, 0xf2, 0x88, 0x87, 0x01},
-  {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xdf, 0x02, 0xb6, 0x15,
-    0xfe, 0x15, 0x92, 0x8f, 0x41, 0xb0, 0x2b, 0x58, 0x6b, 0x51, 0xc2, 0xc0,
-    0x22, 0x60, 0xca, 0x39, 0x68, 0x18, 0xca, 0x4c, 0xba, 0x60, 0xbb, 0x89,
-    0x24, 0x65, 0xbe, 0x35},
-   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xdc, 0xee, 0xb6, 0x0d,
-    0x54, 0x35, 0x18, 0xb4, 0xac, 0x74, 0x83, 0x4a, 0x05, 0x46, 0xc5, 0x07,
-    0xf2, 0xe9, 0x1e, 0x38, 0x9a, 0x87, 0xe2, 0xf2, 0xbe, 0xcc, 0x6f, 0x8c,
-    0x67, 0xd1, 0xc9, 0x31}},
-  {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x48, 0x7e, 0x99,
-    0xe3, 0x75, 0xc3, 0x8d, 0x73, 0x21, 0x12, 0xd9, 0x7d, 0x6d, 0xe8, 0x68,
-    0x7f, 0xda, 0xfc, 0x5b, 0x6b, 0x5f, 0xb1, 0x6e, 0x72, 0x97, 0xd3, 0xbd,
-    0x1e, 0x43, 0x55, 0x99},
-   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x61, 0xb5, 0x50, 0xde,
-    0x64, 0x37, 0x77, 0x4d, 0xb0, 0x57, 0x77, 0x18, 0xed, 0x6c, 0x77, 0x07,
-    0x24, 0xee, 0xe4, 0x66, 0xb4, 0x31, 0x14, 0xb5, 0xb6, 0x9c, 0x43, 0x59,
-    0x1d, 0x31, 0x32, 0x81}},
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x74, 0x4c, 0x79, 0xc4,
-   0xb9, 0xbe, 0xa9, 0x7c, 0x25, 0xe5, 0x63, 0xc9, 0x40, 0x7a, 0x2d, 0x09,
-   0xb5, 0x73, 0x58, 0xaf, 0xe0, 0x9a, 0xf6, 0x7d, 0x71, 0xf8, 0x19, 0x8c,
-   0xb7, 0xc9, 0x56, 0xb8}
-};
-
-static R_RSA_PUBLIC_KEY PUBLIC_KEY2 = {
-  512,
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0xe5, 0xf2, 0x0d, 0xce, 0x83, 0x32, 0x30, 0xe4,
-   0x51, 0xd5, 0x0c, 0x79, 0xa5, 0x34, 0x23, 0xfb, 0x5f, 0xfb, 0xa0, 0xff,
-   0x5c, 0x77, 0x96, 0xa9, 0x2c, 0x35, 0xee, 0x53, 0x02, 0xb7, 0x89, 0x2d,
-   0xf0, 0x78, 0x49, 0xdd, 0xdc, 0x27, 0x79, 0x8b, 0x69, 0xa2, 0x5e, 0x7a,
-   0x40, 0x27, 0x43, 0x82, 0x7a, 0xc4, 0xfa, 0x50, 0x21, 0x1f, 0x15, 0x35,
-   0xc3, 0x93, 0x46, 0x62, 0xcd, 0xd4, 0x26, 0x89},
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01}
-};
-
-static R_RSA_PRIVATE_KEY PRIVATE_KEY2 = {
-  512,
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0xe5, 0xf2, 0x0d, 0xce, 0x83, 0x32, 0x30, 0xe4,
-   0x51, 0xd5, 0x0c, 0x79, 0xa5, 0x34, 0x23, 0xfb, 0x5f, 0xfb, 0xa0, 0xff,
-   0x5c, 0x77, 0x96, 0xa9, 0x2c, 0x35, 0xee, 0x53, 0x02, 0xb7, 0x89, 0x2d,
-   0xf0, 0x78, 0x49, 0xdd, 0xdc, 0x27, 0x79, 0x8b, 0x69, 0xa2, 0x5e, 0x7a,
-   0x40, 0x27, 0x43, 0x82, 0x7a, 0xc4, 0xfa, 0x50, 0x21, 0x1f, 0x15, 0x35,
-   0xc3, 0x93, 0x46, 0x62, 0xcd, 0xd4, 0x26, 0x89},
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01},
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x8e, 0x6b, 0x48, 0x4f, 0xe3, 0x04, 0x60, 0x31,
-   0xd9, 0xd9, 0x59, 0xdb, 0xb2, 0x0d, 0xc4, 0x47, 0x7a, 0x60, 0x70, 0x8c,
-   0x19, 0x2a, 0x5c, 0x9f, 0x35, 0x29, 0xc6, 0x0d, 0x95, 0xfe, 0x35, 0x30,
-   0x99, 0x54, 0xda, 0x99, 0x90, 0xe3, 0x3e, 0x1d, 0xdb, 0x32, 0x7b, 0x1d,
-   0x26, 0xf2, 0x9a, 0xab, 0x03, 0x09, 0x77, 0xba, 0x4f, 0x43, 0xdb, 0xda,
-   0xc8, 0x1f, 0x12, 0xd6, 0xf2, 0x57, 0x1a, 0x31},
-  {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf4, 0x6c, 0x5d, 0xb7,
-    0x7b, 0xa7, 0x9e, 0x2f, 0x4a, 0x26, 0xec, 0xe0, 0x1b, 0x2a, 0x5f, 0x42,
-    0x04, 0x87, 0xb4, 0xc4, 0x68, 0x80, 0xf3, 0x09, 0xe5, 0x48, 0x00, 0x30,
-    0x6f, 0x54, 0x04, 0x75},
-   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0xd6, 0x25, 0x08,
-    0xe5, 0x54, 0x19, 0xa3, 0x98, 0x9d, 0x77, 0x92, 0x18, 0xba, 0x9c, 0x00,
-    0xda, 0x69, 0xee, 0x84, 0xf9, 0x10, 0xe5, 0xda, 0xf0, 0x7d, 0x78, 0x6c,
-    0x92, 0xd8, 0xc7, 0x45}},
-  {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x62, 0x03, 0x32, 0x71,
-    0x69, 0x3c, 0x85, 0xca, 0x20, 0xca, 0x0b, 0x22, 0xb2, 0xc2, 0x03, 0x00,
-    0xce, 0x20, 0x3c, 0xf4, 0xa5, 0x93, 0x4f, 0xe2, 0x1f, 0xf7, 0x07, 0x5c,
-    0x64, 0xc8, 0x24, 0x21},
-   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe4, 0xf1, 0xde, 0x01,
-    0x07, 0xe9, 0x1b, 0xfa, 0x7e, 0x51, 0x6b, 0x62, 0xb2, 0x29, 0x6b, 0xb6,
-    0x0f, 0xeb, 0xd5, 0xf8, 0x08, 0xc1, 0x7c, 0x90, 0xd6, 0x3f, 0xa0, 0xa4,
-    0x2e, 0x30, 0xef, 0xb5}},
-  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x01, 0x60, 0x46,
-   0x90, 0x85, 0xaf, 0x6f, 0xa2, 0x8d, 0x6a, 0x1d, 0x3e, 0xfd, 0x56, 0xd7,
-   0x57, 0x5e, 0x00, 0x30, 0x5b, 0x49, 0x6c, 0xc4, 0x85, 0xf5, 0x1c, 0x39,
-   0xef, 0x0b, 0x4b, 0x28}
-};
-
-R_RSA_PUBLIC_KEY PUBLIC_KEY3;
-R_RSA_PRIVATE_KEY PRIVATE_KEY3;
-int KEYPAIR3_READY = 0;
-
-int main (argc, argv)
-int argc;
-char *argv[];
-{
-  R_RANDOM_STRUCT randomStruct;
-  char command[80];
-  int done = 0;
-
-  if (SetOptions (argc, argv))
-    return (0);
-  
-  InitRandomStruct (&randomStruct);
-  PrintMessage
-    ("NOTE: When saving to a file, a filename of \"-\" will output to the screen.");
-
-  while (!done) {
-    PrintMessage ("");
-    PrintMessage ("S - Sign a file");
-    PrintMessage ("V - Verify a signed file");
-    PrintMessage ("E - sEal a file");
-    PrintMessage ("O - Open a sealed file");
-    PrintMessage ("G - Generate a keypair (may take a long time)");
-    PrintMessage ("Q - Quit");
-    GetCommand (command, sizeof (command), "  Enter choice");
-    
-    switch (*command) {
-    case '#':
-      /* entered a comment */
-      break;
-      
-    case 's':
-    case 'S':
-      DoSignFile ();
-      break;
-      
-    case 'v':
-    case 'V':
-      DoVerifyFile ();
-      break;
-      
-    case 'e':
-    case 'E':
-      DoSealFile (&randomStruct);
-      break;
-
-    case 'o':
-    case 'O':
-      DoOpenFile ();
-      break;
-      
-    case 'g':
-    case 'G':
-      DoGenerateKeys (&randomStruct);
-      break;
-      
-    case '\0':
-    case 'Q':
-    case 'q':
-      done = 1;
-      break;
-      
-    default:
-      PrintError ("ERROR: Unrecognized command.  Try again.", 0);
-      break;
-    }
-  }
-  
-  R_RandomFinal (&randomStruct);
-  R_memset ((POINTER)&PRIVATE_KEY3, 0, sizeof (PRIVATE_KEY3));
-  return (0);
-}
-
-/* Set options from command line and return 0 for success, 1 for bad format.
- */
-static int SetOptions (argc, argv)
-int argc;
-char *argv[];
-{
-  int i, status = 0;
-  
-  for (i = 1; i < argc; i++) {
-    if (argv[i][0] != '-') {
-      status = 1;
-      break;
-    }
-    
-    if (argv[i][1] == 's')
-      SILENT_PROMPT = 1;
-    else {
-      status = 1;
-      break;
-    }
-  }
-
-  if (status)
-    puts ("Usage: rdemo [-s]\n\
-  -s silent prompts\n");
-
-  return (status);
-}
-
-/* Initialize the random structure with all zero seed bytes for test purposes.
-   NOTE that this will cause the output of the "random" process to be
-     the same every time.  To produce random bytes, the random struct
-     needs random seeds!
- */
-static void InitRandomStruct (randomStruct)
-R_RANDOM_STRUCT *randomStruct;
-{
-  static unsigned char seedByte = 0;
-  unsigned int bytesNeeded;
-  
-  R_RandomInit (randomStruct);
-  
-  /* Initialize with all zero seed bytes, which will not yield an actual
-       random number output.
-   */
-  while (1) {
-    R_GetRandomBytesNeeded (&bytesNeeded, randomStruct);
-    if (bytesNeeded == 0)
-      break;
-    
-    R_RandomUpdate (randomStruct, &seedByte, 1);
-  }
-}
-
-static void DoSignFile ()
-{
-  FILE *file;
-  R_RSA_PRIVATE_KEY *privateKey;
-  R_SIGNATURE_CTX context;
-  int digestAlgorithm, status;
-  unsigned char partIn[24], signature[MAX_SIGNATURE_LEN];
-  unsigned int partInLen, signatureLen;
-
-  status = 0;
-
-  if (ReadInit (&file, "  Enter filename of content to sign"))
-    return;
-
-  do {
-    if (GetPrivateKey (&privateKey))
-      break;
-
-    if (GetDigestAlgorithm (&digestAlgorithm))
-      break;
-
-    if ((status = R_SignInit (&context, digestAlgorithm)) != 0)
-      break;
-
-    while (!ReadUpdate (file, partIn, &partInLen, sizeof (partIn)))
-      if ((status = R_SignUpdate (&context, partIn, partInLen)) != 0)
-        break;
-    if (status)
-      break;
-
-    if ((status = R_SignFinal
-         (&context, signature, &signatureLen, privateKey)) != 0)
-      break;
-
-    if (WriteBlock
-        (signature, signatureLen, "  Enter filename to save the signature"))
-      break;
-  } while (0);
-
-  ReadFinal (file);
-
-  if (status)
-    PrintError ("signing file", status);
-
-  R_memset ((POINTER)&context, 0, sizeof (context));
-  R_memset ((POINTER)partIn, 0, sizeof (partIn));
-}
-
-static void DoVerifyFile ()
-{
-  FILE *file;
-  R_RSA_PUBLIC_KEY *publicKey;
-  R_SIGNATURE_CTX context;
-  int digestAlgorithm, status;
-  unsigned char partIn[16], signature[MAX_SIGNATURE_LEN];
-  unsigned int partInLen, signatureLen;
-
-  status = 0;
-
-  if (ReadInit (&file, "  Enter name of file to verify"))
-    return;
-
-  do {
-    if (GetPublicKey (&publicKey))
-      break;
-
-    if (GetDigestAlgorithm (&digestAlgorithm))
-      break;
-
-    if (ReadBlock
-        (signature, &signatureLen, sizeof (signature),
-         "  Enter filename of signature"))
-      break;
-
-    if ((status = R_VerifyInit (&context, digestAlgorithm)) != 0)
-      break;
-
-    while (!ReadUpdate (file, partIn, &partInLen, sizeof (partIn)))
-      if ((status = R_VerifyUpdate (&context, partIn, partInLen)) != 0)
-        break;
-    if (status)
-      break;
-
-    if ((status = R_VerifyFinal
-         (&context, signature, signatureLen, publicKey)) != 0)
-      break;
-
-    PrintMessage ("Signature verified.");
-  } while (0);
-
-  ReadFinal (file);
-
-  if (status)
-    PrintError ("verifying file", status);
-
-  R_memset ((POINTER)&context, 0, sizeof (context));
-  R_memset ((POINTER)partIn, 0, sizeof (partIn));
-}
-
-static void DoSealFile (randomStruct)
-R_RANDOM_STRUCT *randomStruct;
-{
-  FILE *inFile, *outFile;
-  R_ENVELOPE_CTX context;
-  R_RSA_PUBLIC_KEY *publicKey;
-  int encryptionAlgorithm, status;
-  unsigned char encryptedKey[MAX_ENCRYPTED_KEY_LEN], *encryptedKeys[1],
-    iv[8], partIn[24], partOut[31];
-  unsigned int encryptedKeyLen, partInLen, partOutLen;
-
-  status = 0;
-
-  if (ReadInit (&inFile, "  Enter filename of content to seal"))
-    return;
-  if (WriteInit (&outFile, "  Enter filename to save the encrypted content")) {
-    ReadFinal (inFile);
-    return;
-  }
-
-  do {
-    if (GetPublicKey (&publicKey))
-      break;
-
-    if (GetEncryptionAlgorithm (&encryptionAlgorithm))
-      break;
-
-    encryptedKeys[0] = encryptedKey;
-
-    if ((status = R_SealInit
-         (&context, encryptedKeys, &encryptedKeyLen, iv, 1, &publicKey,
-          encryptionAlgorithm, randomStruct)) != 0)
-      break;
-
-    while (!ReadUpdate (inFile, partIn, &partInLen, sizeof (partIn))) {
-      if ((status = R_SealUpdate
-           (&context, partOut, &partOutLen, partIn, partInLen)) != 0)
-        break;
-      WriteUpdate (outFile, partOut, partOutLen);
-    }
-    if (status)
-      break;
-
-    if ((status = R_SealFinal (&context, partOut, &partOutLen)))
-      break;
-    WriteUpdate (outFile, partOut, partOutLen);
-  
-    if (WriteBlock
-        (encryptedKey, encryptedKeyLen,
-         "  Enter filename to save the encrypted key"))
-      break;
-    if (WriteBlock
-        (iv, 8, "  Enter filename to save the initializing vector"))
-      break;
-  } while (0);
-  
-  ReadFinal (inFile);
-  WriteFinal (outFile);
-
-  if (status)
-    PrintError ("sealing file", status);
-
-  R_memset ((POINTER)&context, 0, sizeof (context));
-  R_memset ((POINTER)partIn, 0, sizeof (partIn));
-}
-
-static void DoOpenFile ()
-{
-  FILE *inFile, *outFile;
-  R_ENVELOPE_CTX context;
-  R_RSA_PRIVATE_KEY *privateKey;
-  int encryptionAlgorithm, status;
-  unsigned char encryptedKey[MAX_ENCRYPTED_KEY_LEN], iv[8], partIn[24],
-    partOut[31];
-  unsigned int encryptedKeyLen, ivLen, partInLen, partOutLen;
-
-  status = 0;
-
-  if (ReadInit (&inFile, "  Enter filename of encrypted content to open"))
-    return;
-
-  if (WriteInit (&outFile, "  Enter filename to save the recovered content")) {
-    ReadFinal (inFile);
-    return;
-  }
-
-  do {
-    if (GetPrivateKey (&privateKey))
-      break;
-
-    if (GetEncryptionAlgorithm (&encryptionAlgorithm))
-      break;
-
-    if (ReadBlock
-        (encryptedKey, &encryptedKeyLen, sizeof (encryptedKey),
-         "  Enter filename of the encrypted key"))
-      break;  
-    if (ReadBlock
-        (iv, &ivLen, 8, "  Enter filename of the initializing vector"))
-      break;
-
-    if ((status = R_OpenInit
-         (&context, encryptionAlgorithm, encryptedKey, encryptedKeyLen, iv,
-          privateKey)) != 0)
-      break;
-    
-    while (!ReadUpdate (inFile, partIn, &partInLen, sizeof (partIn))) {
-      if ((status = R_OpenUpdate
-           (&context, partOut, &partOutLen, partIn, partInLen)) != 0)
-        break;
-      WriteUpdate (outFile, partOut, partOutLen);
-    }
-    if (status)
-      break;
-
-    if ((status = R_OpenFinal (&context, partOut, &partOutLen)) != 0)
-      break;
-    WriteUpdate (outFile, partOut, partOutLen);
-  } while (0);
-  
-  ReadFinal (inFile);
-  WriteFinal (outFile);
-
-  if (status)
-    PrintError ("opening file", status);
-
-  R_memset ((POINTER)&context, 0, sizeof (context));
-  R_memset ((POINTER)partOut, 0, sizeof (partOut));
-}
-
-static void DoGenerateKeys (randomStruct)
-R_RANDOM_STRUCT *randomStruct;
-{
-  R_RSA_PROTO_KEY protoKey;
-  char command[80];
-  int status, keySize;
-
-  GetCommand
-    (command, sizeof (command),
-     "  Enter key size in bits, (508 to 1024)");
-  if (! *command)
-    return;
-  sscanf (command, "%d", &keySize);
-  
-  protoKey.bits = (unsigned int)keySize;
-  protoKey.useFermat4 = 1;
-  
-  if (status = R_GeneratePEMKeys
-      (&PUBLIC_KEY3, &PRIVATE_KEY3, &protoKey, randomStruct)) {
-    PrintError ("generating keys", status);
-    return;
-  }
-
-  PrintMessage ("Public key 3 and private key 3 are now ready to use.");
-  KEYPAIR3_READY = 1;
-  
-  WriteKeypair3 ();
-}
-
-static void WriteKeypair3 ()
-{
-  FILE *file;
-  char filename[256];
-  
-  while (1) {
-    GetCommand
-      (filename, sizeof (filename),
-       "  Enter filename to save the keypair");
-    if (! *filename)
-      return;
-    
-    if (filename[0] == '-' && filename[1] == '\0') {
-      /* use stdout */
-      file = stdout;
-      break;
-    }
-    if ((file = fopen (filename, "w")) != NULL)
-      /* successfully opened */
-      break;
-    
-    PrintError ("ERROR: Cannot open a file with that name.  Try again.", 0);
-  }
-
-  fprintf (file, "Public Key, %u bits:\n", PUBLIC_KEY3.bits);
-  fprintf (file, "  modulus: ");
-  WriteBigInteger (file, PUBLIC_KEY3.modulus, sizeof (PUBLIC_KEY3.modulus));
-  fprintf (file, "  exponent: ");
-  WriteBigInteger (file, PUBLIC_KEY3.exponent, sizeof (PUBLIC_KEY3.exponent));
-
-  fprintf (file, "\nPrivate Key, %u bits:\n", PRIVATE_KEY3.bits);
-  fprintf (file, "  modulus: ");
-  WriteBigInteger (file, PRIVATE_KEY3.modulus, sizeof (PRIVATE_KEY3.modulus));
-  fprintf (file, "  public exponent: ");
-  WriteBigInteger
-    (file, PRIVATE_KEY3.publicExponent, sizeof (PRIVATE_KEY3.publicExponent));
-  fprintf (file, "  exponent: ");
-  WriteBigInteger
-    (file, PRIVATE_KEY3.exponent, sizeof (PRIVATE_KEY3.exponent));
-  fprintf (file, "  prime 1: ");
-  WriteBigInteger
-    (file, PRIVATE_KEY3.prime[0], sizeof (PRIVATE_KEY3.prime[0]));
-  fprintf (file, "  prime 2: ");
-  WriteBigInteger
-    (file, PRIVATE_KEY3.prime[1], sizeof (PRIVATE_KEY3.prime[1]));
-  fprintf (file, "  prime exponent 1: ");
-  WriteBigInteger
-    (file, PRIVATE_KEY3.primeExponent[0],
-     sizeof (PRIVATE_KEY3.primeExponent[0]));
-  fprintf (file, "  prime exponent 2: ");
-  WriteBigInteger
-    (file, PRIVATE_KEY3.primeExponent[1],
-     sizeof (PRIVATE_KEY3.primeExponent[1]));
-  fprintf (file, "  coefficient: ");
-  WriteBigInteger
-    (file, PRIVATE_KEY3.coefficient, sizeof (PRIVATE_KEY3.coefficient));
-
-  if (file != stdout)
-    fclose (file);
-}
-
-/* Write the byte string 'integer' to 'file', skipping over leading zeros.
- */
-static void WriteBigInteger (file, integer, integerLen)
-FILE *file;
-unsigned char *integer;
-unsigned int integerLen;
-{
-  while (*integer == 0 && integerLen > 0) {
-    integer++;
-    integerLen--;
-  }
-  
-  if (integerLen == 0) {
-    /* Special case, just print a zero. */
-    fprintf (file, "00\n");
-    return;
-  }
-  
-  for (; integerLen > 0; integerLen--)
-    fprintf (file, "%02x ", (unsigned int)(*integer++));
-
-  fprintf (file, "\n");
-}
-
-/* Ask the user to use public key 1, 2 or 3 and point publicKey to
-     the answer.
-   Return 0 on success or 1 if user cancels by entering a blank.
- */
-static int GetPublicKey (publicKey)
-R_RSA_PUBLIC_KEY **publicKey;
-{
-  char command[80];
-  
-  while (1) {
-    if (!KEYPAIR3_READY)
-      GetCommand (command, sizeof (command), "  Public key 1 or 2?");
-    else
-      GetCommand (command, sizeof (command), "  Public key 1, 2 or 3?");
-
-    switch (*command) {
-    case '\0':
-      return (1);
-      
-    case '1':
-      *publicKey = &PUBLIC_KEY1;
-      return (0);
-      
-    case '2':
-      *publicKey = &PUBLIC_KEY2;
-      return (0);
-      
-    case '3':
-      if (!KEYPAIR3_READY)
-        break;
-      *publicKey = &PUBLIC_KEY3;
-      return (0);
-      
-    default:
-      if (KEYPAIR3_READY)
-        PrintError ("ERROR: Please enter 1, 2 or 3.  Try again.", 0);
-      else
-        PrintError ("ERROR: Please enter 1 or 2.  Try again.", 0);
-      break;
-    }
-  }
-}
-
-/* Ask the user to use private key 1, 2 or 3 and point privateKey to
-     the answer.
-   Return 0 on success or 1 if user cancels by entering a blank.
- */
-static int GetPrivateKey (privateKey)
-R_RSA_PRIVATE_KEY **privateKey;
-{
-  char command[80];
-  
-  while (1) {
-    if (!KEYPAIR3_READY)
-      GetCommand (command, sizeof (command), "  Public key 1 or 2?");
-    else
-      GetCommand (command, sizeof (command), "  Public key 1, 2 or 3?");
-
-    switch (*command) {
-    case '\0':
-      return (1);
-      
-    case '1':
-      *privateKey = &PRIVATE_KEY1;
-      return (0);
-      
-    case '2':
-      *privateKey = &PRIVATE_KEY2;
-      return (0);
-      
-    case '3':
-      if (!KEYPAIR3_READY)
-        break;
-      *privateKey = &PRIVATE_KEY3;
-      return (0);
-      
-    default:
-      if (KEYPAIR3_READY)
-        PrintError ("ERROR: Please enter 1, 2 or 3.  Try again.", 0);
-      else
-        PrintError ("ERROR: Please enter 1 or 2.  Try again.", 0);
-      break;
-    }
-  }
-}
-
-/* Ask the user to use MD2 or MD5 and point digestAlgorithm to the
-     answer.
-   Return 0 on success or 1 if user cancels by entering a blank.
- */
-static int GetDigestAlgorithm (digestAlgorithm)
-int *digestAlgorithm;
-{
-  char command[80];
-  
-  while (1) {
-    GetCommand (command, sizeof (command), "  MD2 or MD5 (2 or 5)?");
-
-    switch (*command) {
-    case '\0':
-      return (1);
-      
-    case '2':
-      *digestAlgorithm = DA_MD2;
-      return (0);
-      
-    case '5':
-      *digestAlgorithm = DA_MD5;
-      return (0);
-      
-    default:
-      PrintError ("ERROR: Please enter 2 or 5.  Try again.", 0);
-      break;
-    }
-  }
-}
-
-/* Ask the user to use DES, DESX, DES-EDE2, or DES-EDE3, and point
-     encryptionAlgorithm to the answer.
-   Return 0 on success or 1 if user cancels by entering a blank.
- */
-static int GetEncryptionAlgorithm (encryptionAlgorithm)
-int *encryptionAlgorithm;
-{
-  char command[80];
-  
-  while (1) {
-    GetCommand
-      (command, sizeof (command),
-       "  DES, DESX, DES-EDE2 or DES-EDE3 (1, X, 2 or 3)?");
-
-    switch (*command) {
-    case '\0':
-      return (1);
-      
-    case '1':
-      *encryptionAlgorithm = EA_DES_CBC;
-      return (0);
-      
-    case 'x':
-    case 'X':
-      *encryptionAlgorithm = EA_DESX_CBC;
-      return (0);
-      
-    case '2':
-      *encryptionAlgorithm = EA_DES_EDE2_CBC;
-      return (0);
-      
-    case '3':
-      *encryptionAlgorithm = EA_DES_EDE3_CBC;
-      return (0);
-      
-    default:
-      PrintError ("ERROR: Please enter 1, X, 2 or 3.  Try again.", 0);
-      break;
-    }
-  }
-}
-
-/* Ask for the filename using the given prompt string and open it
-     for reading.
-   Return 0 on success or 1 if error or if user cancels by entering a blank.
- */
-static int ReadInit (file, prompt) 
-FILE **file;
-char *prompt;
-{
-  char filename[256];
-  
-  while (1) {
-    GetCommand (filename, sizeof (filename), prompt);
-    if (! *filename)
-      return (1);
-    
-    if ((*file = fopen (filename, "rb")) != NULL)
-      /* successfully opened */
-      break;
-    
-    PrintError ("ERROR: Cannot open a file with that name.  Try again.", 0);
-  }
-
-  return (0);
-}
-
-/* Read a block of up to length maxPartOutLen bytes from file, storing
-     it in partOut and returning its length in partOutLen.
-   Return 0 on success or 1 if error or end of file.
- */
-static int ReadUpdate (file, partOut, partOutLen, maxPartOutLen)
-FILE *file;
-unsigned char *partOut;
-unsigned int *partOutLen;
-unsigned int maxPartOutLen;
-{
-  int status;
-  
-  /* fread () returns the number of items read in.
-   */
-  *partOutLen = fread (partOut, 1, maxPartOutLen, file);
-
-  status = 0;
-  if (ferror (file)) {
-    PrintError ("ERROR: Cannot read file.", 0);
-    status = 1;
-  }
-  if (*partOutLen == 0 && feof (file))
-    status = 1;
-
-  return (status);
-}
-
-/* Close file.
- */
-static void ReadFinal (file)
-FILE *file;
-{
-  fclose (file);
-}
-
-/* Read a file of up to length maxBlockLen bytes, storing it in
-     block and returning its length in blockLen.
-   Ask for the filename using the given prompt string.
-   Return 0 on success or 1 if error or if user cancels by entering a blank.
- */
-static int ReadBlock (block, blockLen, maxBlockLen, prompt) 
-unsigned char *block;
-unsigned int *blockLen;
-unsigned int maxBlockLen;
-char *prompt;
-{
-  FILE *file;
-  int status;
-  unsigned char *dummy;
-  unsigned int dummyLen;
-
-  if (ReadInit (&file, prompt))
-    return (1);
-
-  if ((status = ReadUpdate (file, block, blockLen, maxBlockLen)) == 0) {
-    if (*blockLen == maxBlockLen)
-      /* Read exactly maxBlockLen bytes, so reading one more will set 
-           end of file if there were exactly maxBlockLen bytes in the file.
-       */
-      if (!ReadUpdate (file, dummy, &dummyLen, 1)) {
-        PrintError ("ERROR: File is too large.", 0);
-        status = 1;
-      }
-  }
-    
-  ReadFinal (file);
-
-  return (status);
-}
-
-/* Ask for the filename using the given prompt string and open it
-     for writing. 
-   Return 0 on success or 1 if error or if user cancels by entering a blank.
- */
-static int WriteInit (file, prompt) 
-FILE **file;
-char *prompt;
-{
-  char filename[256];
-  
-  while (1) {
-    GetCommand (filename, sizeof (filename), prompt);
-    if (! *filename)
-      return (1);
-    
-    if (filename[0] == '-' && filename[1] == '\0') {
-      /* use stdout */
-      *file = stdout;
-      break;
-    }
-    if ((*file = fopen (filename, "wb")) != NULL)
-      /* successfully opened */
-      break;
-    
-    PrintError ("ERROR: Cannot open a file with that name.  Try again.", 0);
-  }
-
-  return (0);
-}
-
-/* Write block of length partOutLen to a file.
-   Return 0 on success or 1 if error.
- */
-static int WriteUpdate (file, partOut, partOutLen)
-FILE *file;
-unsigned char *partOut;
-unsigned int partOutLen;
-{
-  int status;
-
-  status = 0;
-  if (fwrite (partOut, 1, partOutLen, file) < partOutLen) {
-    PrintError ("ERROR: Cannot write file.", 0);
-    status = 1;
-  }
-  
-  return (status);
-}
-
-/* Close file.
- */
-static void WriteFinal (file)
-FILE *file;
-{
-  if (file != stdout)
-    fclose (file);
-}
-
-/* Write block of length blockLen to a file.
-   Ask for the filename using the given prompt string.
-   Return 0 on success or 1 if error or if user cancels by entering a blank.
- */
-static int WriteBlock (block, blockLen, prompt) 
-unsigned char *block;
-unsigned int blockLen;
-char *prompt;
-{
-  FILE *file;
-  int status;
-
-  if (WriteInit (&file, prompt))
-    return (1);
-
-  do {
-    if ((status = WriteUpdate (file, block, blockLen)) != 0)
-      break;
-  
-    if (file == stdout)
-      /* Printing to screen, so print a new line. */
-      printf ("\n");
-  } while (0);
-
-  WriteFinal (file);
-
-  return (status);
-}
-
-static void PrintMessage (message)
-char *message;
-{
-  if (!SILENT_PROMPT) {
-    puts (message);
-    fflush (stdout);
-  }
-}
-
-/* If type is zero, simply print the task string, otherwise convert the
-     type to a string and print task and type.
- */
-static void PrintError (task, type)
-char *task;
-int type;
-{
-  char *typeString, buf[80];
-
-  if (type == 0) {
-    puts (task);
-    return;
-  }
-  
-  /* Convert the type to a string if it is recognized.
-   */
-  switch (type) {
-  case RE_KEY:
-    typeString = "Recovered DES key cannot decrypt encrypted content";
-    break;
-  case RE_LEN:
-    typeString = "Encrypted key length or signature length is out of range";
-    break;
-  case RE_MODULUS_LEN:
-    typeString = "Modulus length is out of range";
-    break;
-  case RE_PRIVATE_KEY:
-    typeString = "Private key cannot encrypt message digest, or cannot decrypt encrypted key";
-    break;
-  case RE_PUBLIC_KEY:
-    typeString = "Public key cannot encrypt data encryption key, or cannot decrypt signature";
-    break;
-  case RE_SIGNATURE:
-    typeString = "Signature is incorrect";
-    break;
-    
-  default:
-    sprintf (buf, "Code 0x%04x", type);
-    typeString = buf;
-  }
-
-  printf ("ERROR: %s while %s\n", typeString, task);  
-  fflush (stdout);
-}
-
-static void GetCommand (command, maxCommandSize, prompt)
-char *command;
-unsigned int maxCommandSize;
-char *prompt;
-{
-  unsigned int i;
-  
-  if (!SILENT_PROMPT) {
-    printf ("%s (blank to cancel): \n", prompt);  
-    fflush (stdout);
-  }
-
-  fgets (command, maxCommandSize, stdin);
-  
-  /* Replace the line terminator with a '\0'.
-   */
-  for (i = 0; command[i] != '\0'; i++) {
-    if (command[i] == '\012' || command[i] == '\015' ||
-        i == (maxCommandSize - 1)) {
-      command[i] = '\0';
-      return;
-    }
-  }
-}
+/* RDEMO.C - RSAREF demonstration program
+ */
+
+/* Copyright (C) 1991-2 RSA Laboratories, a division of RSA Data
+   Security, Inc. All rights reserved.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "global.h"
+#include "rsaref.h"
+
+int main PROTO_LIST ((int, char **));
+static int SetOptions PROTO_LIST ((int, char **));
+static void InitRandomStruct PROTO_LIST ((R_RANDOM_STRUCT *));
+static void DoSignFile PROTO_LIST ((void));
+static void DoSealFile PROTO_LIST ((R_RANDOM_STRUCT *));
+static void DoVerifyFile PROTO_LIST ((void));
+static void DoOpenFile PROTO_LIST ((void));
+static void DoGenerateKeys PROTO_LIST ((R_RANDOM_STRUCT *));
+static void WriteKeypair3 PROTO_LIST ((void));
+static void WriteBigInteger PROTO_LIST
+  ((FILE *, unsigned char *, unsigned int));
+static int ReadBlock PROTO_LIST
+  ((unsigned char *, unsigned int *, unsigned int, char *));
+static int ReadText PROTO_LIST
+  ((unsigned char *, unsigned int *, unsigned int, char *));
+static int WriteBlock PROTO_LIST ((unsigned char *, unsigned int, char *));
+static int GetPublicKey PROTO_LIST ((R_RSA_PUBLIC_KEY **, char *));
+static int GetPrivateKey PROTO_LIST ((R_RSA_PRIVATE_KEY **, char *));
+static void PrintMessage PROTO_LIST ((char *));
+static void PrintError PROTO_LIST ((char *, int));
+static void GetCommand PROTO_LIST ((char *, unsigned int, char *));
+
+static int SILENT_PROMPT = 0;
+static int DIGEST_ALGORITHM = DA_MD5;
+
+static R_RSA_PUBLIC_KEY PUBLIC_KEY1 = {
+  512,
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0xc0, 0x76, 0x47, 0x97, 0xb8, 0xbe, 0xc8, 0x97,
+   0x2a, 0x0e, 0xd8, 0xc9, 0x0a, 0x8c, 0x33, 0x4d, 0xd0, 0x49, 0xad, 0xd0,
+   0x22, 0x2c, 0x09, 0xd2, 0x0b, 0xe0, 0xa7, 0x9e, 0x33, 0x89, 0x10, 0xbc,
+   0xae, 0x42, 0x20, 0x60, 0x90, 0x6a, 0xe0, 0x22, 0x1d, 0xe3, 0xf3, 0xfc,
+   0x74, 0x7c, 0xcf, 0x98, 0xae, 0xcc, 0x85, 0xd6, 0xed, 0xc5, 0x2d, 0x93,
+   0xd5, 0xb7, 0x39, 0x67, 0x76, 0x16, 0x05, 0x25},
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01}
+};
+
+static R_RSA_PRIVATE_KEY PRIVATE_KEY1 = {
+  512,
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0xc0, 0x76, 0x47, 0x97, 0xb8, 0xbe, 0xc8, 0x97,
+   0x2a, 0x0e, 0xd8, 0xc9, 0x0a, 0x8c, 0x33, 0x4d, 0xd0, 0x49, 0xad, 0xd0,
+   0x22, 0x2c, 0x09, 0xd2, 0x0b, 0xe0, 0xa7, 0x9e, 0x33, 0x89, 0x10, 0xbc,
+   0xae, 0x42, 0x20, 0x60, 0x90, 0x6a, 0xe0, 0x22, 0x1d, 0xe3, 0xf3, 0xfc,
+   0x74, 0x7c, 0xcf, 0x98, 0xae, 0xcc, 0x85, 0xd6, 0xed, 0xc5, 0x2d, 0x93,
+   0xd5, 0xb7, 0x39, 0x67, 0x76, 0x16, 0x05, 0x25},
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01},
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x1a, 0xe3, 0x6b, 0x75, 0x22, 0xf6, 0x64, 0x87,
+   0xd9, 0xf4, 0x61, 0x0d, 0x15, 0x50, 0x29, 0x0a, 0xc2, 0x02, 0xc9, 0x29,
+   0xbe, 0xdc, 0x70, 0x32, 0xcc, 0x3e, 0x02, 0xac, 0xf3, 0x7e, 0x3e, 0xbc,
+   0x1f, 0x86, 0x6e, 0xe7, 0xef, 0x7a, 0x08, 0x68, 0xd2, 0x3a, 0xe2, 0xb1,
+   0x84, 0xc1, 0xab, 0xd6, 0xd4, 0xdb, 0x8e, 0xa9, 0xbe, 0xc0, 0x46, 0xbd,
+   0x82, 0x80, 0x37, 0x27, 0xf2, 0x88, 0x87, 0x01},
+  {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xdf, 0x02, 0xb6, 0x15,
+    0xfe, 0x15, 0x92, 0x8f, 0x41, 0xb0, 0x2b, 0x58, 0x6b, 0x51, 0xc2, 0xc0,
+    0x22, 0x60, 0xca, 0x39, 0x68, 0x18, 0xca, 0x4c, 0xba, 0x60, 0xbb, 0x89,
+    0x24, 0x65, 0xbe, 0x35},
+   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xdc, 0xee, 0xb6, 0x0d,
+    0x54, 0x35, 0x18, 0xb4, 0xac, 0x74, 0x83, 0x4a, 0x05, 0x46, 0xc5, 0x07,
+    0xf2, 0xe9, 0x1e, 0x38, 0x9a, 0x87, 0xe2, 0xf2, 0xbe, 0xcc, 0x6f, 0x8c,
+    0x67, 0xd1, 0xc9, 0x31}},
+  {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x48, 0x7e, 0x99,
+    0xe3, 0x75, 0xc3, 0x8d, 0x73, 0x21, 0x12, 0xd9, 0x7d, 0x6d, 0xe8, 0x68,
+    0x7f, 0xda, 0xfc, 0x5b, 0x6b, 0x5f, 0xb1, 0x6e, 0x72, 0x97, 0xd3, 0xbd,
+    0x1e, 0x43, 0x55, 0x99},
+   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x61, 0xb5, 0x50, 0xde,
+    0x64, 0x37, 0x77, 0x4d, 0xb0, 0x57, 0x77, 0x18, 0xed, 0x6c, 0x77, 0x07,
+    0x24, 0xee, 0xe4, 0x66, 0xb4, 0x31, 0x14, 0xb5, 0xb6, 0x9c, 0x43, 0x59,
+    0x1d, 0x31, 0x32, 0x81}},
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x74, 0x4c, 0x79, 0xc4,
+   0xb9, 0xbe, 0xa9, 0x7c, 0x25, 0xe5, 0x63, 0xc9, 0x40, 0x7a, 0x2d, 0x09,
+   0xb5, 0x73, 0x58, 0xaf, 0xe0, 0x9a, 0xf6, 0x7d, 0x71, 0xf8, 0x19, 0x8c,
+   0xb7, 0xc9, 0x56, 0xb8}
+};
+
+static R_RSA_PUBLIC_KEY PUBLIC_KEY2 = {
+  512,
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0xe5, 0xf2, 0x0d, 0xce, 0x83, 0x32, 0x30, 0xe4,
+   0x51, 0xd5, 0x0c, 0x79, 0xa5, 0x34, 0x23, 0xfb, 0x5f, 0xfb, 0xa0, 0xff,
+   0x5c, 0x77, 0x96, 0xa9, 0x2c, 0x35, 0xee, 0x53, 0x02, 0xb7, 0x89, 0x2d,
+   0xf0, 0x78, 0x49, 0xdd, 0xdc, 0x27, 0x79, 0x8b, 0x69, 0xa2, 0x5e, 0x7a,
+   0x40, 0x27, 0x43, 0x82, 0x7a, 0xc4, 0xfa, 0x50, 0x21, 0x1f, 0x15, 0x35,
+   0xc3, 0x93, 0x46, 0x62, 0xcd, 0xd4, 0x26, 0x89},
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01}
+};
+
+static R_RSA_PRIVATE_KEY PRIVATE_KEY2 = {
+  512,
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0xe5, 0xf2, 0x0d, 0xce, 0x83, 0x32, 0x30, 0xe4,
+   0x51, 0xd5, 0x0c, 0x79, 0xa5, 0x34, 0x23, 0xfb, 0x5f, 0xfb, 0xa0, 0xff,
+   0x5c, 0x77, 0x96, 0xa9, 0x2c, 0x35, 0xee, 0x53, 0x02, 0xb7, 0x89, 0x2d,
+   0xf0, 0x78, 0x49, 0xdd, 0xdc, 0x27, 0x79, 0x8b, 0x69, 0xa2, 0x5e, 0x7a,
+   0x40, 0x27, 0x43, 0x82, 0x7a, 0xc4, 0xfa, 0x50, 0x21, 0x1f, 0x15, 0x35,
+   0xc3, 0x93, 0x46, 0x62, 0xcd, 0xd4, 0x26, 0x89},
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01},
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x8e, 0x6b, 0x48, 0x4f, 0xe3, 0x04, 0x60, 0x31,
+   0xd9, 0xd9, 0x59, 0xdb, 0xb2, 0x0d, 0xc4, 0x47, 0x7a, 0x60, 0x70, 0x8c,
+   0x19, 0x2a, 0x5c, 0x9f, 0x35, 0x29, 0xc6, 0x0d, 0x95, 0xfe, 0x35, 0x30,
+   0x99, 0x54, 0xda, 0x99, 0x90, 0xe3, 0x3e, 0x1d, 0xdb, 0x32, 0x7b, 0x1d,
+   0x26, 0xf2, 0x9a, 0xab, 0x03, 0x09, 0x77, 0xba, 0x4f, 0x43, 0xdb, 0xda,
+   0xc8, 0x1f, 0x12, 0xd6, 0xf2, 0x57, 0x1a, 0x31},
+  {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf4, 0x6c, 0x5d, 0xb7,
+    0x7b, 0xa7, 0x9e, 0x2f, 0x4a, 0x26, 0xec, 0xe0, 0x1b, 0x2a, 0x5f, 0x42,
+    0x04, 0x87, 0xb4, 0xc4, 0x68, 0x80, 0xf3, 0x09, 0xe5, 0x48, 0x00, 0x30,
+    0x6f, 0x54, 0x04, 0x75},
+   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0xd6, 0x25, 0x08,
+    0xe5, 0x54, 0x19, 0xa3, 0x98, 0x9d, 0x77, 0x92, 0x18, 0xba, 0x9c, 0x00,
+    0xda, 0x69, 0xee, 0x84, 0xf9, 0x10, 0xe5, 0xda, 0xf0, 0x7d, 0x78, 0x6c,
+    0x92, 0xd8, 0xc7, 0x45}},
+  {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x62, 0x03, 0x32, 0x71,
+    0x69, 0x3c, 0x85, 0xca, 0x20, 0xca, 0x0b, 0x22, 0xb2, 0xc2, 0x03, 0x00,
+    0xce, 0x20, 0x3c, 0xf4, 0xa5, 0x93, 0x4f, 0xe2, 0x1f, 0xf7, 0x07, 0x5c,
+    0x64, 0xc8, 0x24, 0x21},
+   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe4, 0xf1, 0xde, 0x01,
+    0x07, 0xe9, 0x1b, 0xfa, 0x7e, 0x51, 0x6b, 0x62, 0xb2, 0x29, 0x6b, 0xb6,
+    0x0f, 0xeb, 0xd5, 0xf8, 0x08, 0xc1, 0x7c, 0x90, 0xd6, 0x3f, 0xa0, 0xa4,
+    0x2e, 0x30, 0xef, 0xb5}},
+  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x01, 0x60, 0x46,
+   0x90, 0x85, 0xaf, 0x6f, 0xa2, 0x8d, 0x6a, 0x1d, 0x3e, 0xfd, 0x56, 0xd7,
+   0x57, 0x5e, 0x00, 0x30, 0x5b, 0x49, 0x6c, 0xc4, 0x85, 0xf5, 0x1c, 0x39,
+   0xef, 0x0b, 0x4b, 0x28}
+};
+
+R_RSA_PUBLIC_KEY PUBLIC_KEY3;
+R_RSA_PRIVATE_KEY PRIVATE_KEY3;
+int KEYPAIR3_READY = 0;
+
+int main (argc, argv)
+int argc;
+char *argv[];
+{
+  R_RANDOM_STRUCT randomStruct;
+  char command[80];
+  int done = 0;
+
+  if (SetOptions (argc, argv))
+    return (0);
+  
+  InitRandomStruct (&randomStruct);
+  PrintMessage
+    ("NOTE: When saving to a file, a filename of \"-\" will output to the screen.");
+
+  while (!done) {
+    PrintMessage ("");
+    PrintMessage ("S - Sign a file");
+    PrintMessage ("E - sEal a file");
+    PrintMessage ("V - Verify a signed file");
+    PrintMessage ("O - Open a sealed file");
+    PrintMessage ("G - Generate a keypair (at least 2 minutes)");
+    PrintMessage ("Q - Quit");
+    GetCommand (command, sizeof (command), "  Enter choice: ");
+    
+    switch (*command) {
+    case '\0':
+    case '#':
+      /* entered a blank line or a comment */
+      break;
+      
+    case 's':
+    case 'S':
+      DoSignFile ();
+      break;
+      
+    case 'e':
+    case 'E':
+      DoSealFile (&randomStruct);
+      break;
+      
+    case 'v':
+    case 'V':
+      DoVerifyFile ();
+      break;
+      
+    case 'o':
+    case 'O':
+      DoOpenFile ();
+      break;
+      
+    case 'g':
+    case 'G':
+      DoGenerateKeys (&randomStruct);
+      break;
+      
+    case 'Q':
+    case 'q':
+      done = 1;
+      break;
+      
+    default:
+      PrintError ("ERROR: Unrecognized command.  Try again.", 0);
+      break;
+    }
+  }
+  
+  R_RandomFinal (&randomStruct);
+  memset ((POINTER)&PRIVATE_KEY3, 0, sizeof (PRIVATE_KEY3));
+  return (0);
+}
+
+/* Set options from command line and return 0 for success, 1 for bad format.
+ */
+static int SetOptions (argc, argv)
+int argc;
+char *argv[];
+{
+  int i, status = 0;
+  
+  for (i = 1; i < argc; i++) {
+    if (argv[i][0] != '-') {
+      status = 1;
+      break;
+    }
+    
+    if (argv[i][1] == 's')
+      SILENT_PROMPT = 1;
+    else if (argv[i][1] == '2')
+      DIGEST_ALGORITHM = DA_MD2;
+    else {
+      status = 1;
+      break;
+    }
+  }
+
+  if (status)
+    puts ("Usage: rdemo [-s] [-2]\n\
+  -s silent prompts\n\
+  -2 use MD2 (not MD5)");
+
+  return (status);
+}
+
+/* Initialize the random structure with all zero seed bytes for test purposes.
+   NOTE that this will cause the output of the "random" process to be
+     the same every time.  To produce random bytes, the random struct
+     needs random seeds!
+ */
+static void InitRandomStruct (randomStruct)
+R_RANDOM_STRUCT *randomStruct;
+{
+  static unsigned char seedByte = 0;
+  unsigned int bytesNeeded;
+  
+  R_RandomInit (randomStruct);
+  
+  /* Initialize with all zero seed bytes, which will not yield an actual
+       random number output.
+   */
+  while (1) {
+    R_GetRandomBytesNeeded (&bytesNeeded, randomStruct);
+    if (bytesNeeded == 0)
+      break;
+    
+    R_RandomUpdate (randomStruct, &seedByte, 1);
+  }
+}
+
+static void DoSignFile ()
+{
+  R_RSA_PRIVATE_KEY *privateKey;
+  char command[80];
+  int status, recodeFlag;
+  unsigned char content[1000], encodedContent[1000],
+    encodedSignature[MAX_PEM_SIGNATURE_LEN];
+  unsigned int contentLen, encodedContentLen, encodedSignatureLen;
+
+  if (ReadText
+      (content, &contentLen, sizeof (content),
+       "  Enter filename of content to sign (blank to cancel): "))
+    return;
+  GetCommand
+    (command, sizeof (command),
+     "  ASCII recode the content [y/n] ? (blank to cancel): ");
+  if (! *command)
+    return;
+  else if (*command == 'y' || *command == 'Y') {
+    if (ENCODED_CONTENT_LEN (contentLen) > sizeof (encodedContent)) {
+      PrintError ("ERROR: Not enough room to recode the content", 0);
+      return;
+    }
+    else
+      recodeFlag = 1;
+  }
+  else
+    recodeFlag = 0;
+  
+  if (GetPrivateKey
+      (&privateKey,
+       "  Sign as user with private key 1, 2, or 3? (blank to cancel): "))
+    return;
+  
+  if (status = R_SignPEMBlock
+      (encodedContent, &encodedContentLen, encodedSignature,
+       &encodedSignatureLen, content, contentLen, recodeFlag,
+       DIGEST_ALGORITHM, privateKey)) {
+    PrintError ("signing file", status);
+    return;
+  }
+  
+  if (WriteBlock
+      (encodedSignature, encodedSignatureLen,
+       "  Enter filename to save the signature (blank to cancel): "))
+    return;
+  
+  if (recodeFlag) {
+    if (WriteBlock
+        (encodedContent, encodedContentLen,
+         "  Enter filename to save the encoded content (blank to cancel): "))
+      return;
+  }
+}
+
+static void DoSealFile (randomStruct)
+R_RANDOM_STRUCT *randomStruct;
+{
+  R_RSA_PRIVATE_KEY *privateKey;
+  R_RSA_PUBLIC_KEY *publicKey;
+  int status;
+  unsigned char content[1000], encryptedContent[1000],
+    encryptedSignature[MAX_PEM_ENCRYPTED_SIGNATURE_LEN],
+    encryptedKey[MAX_PEM_ENCRYPTED_KEY_LEN], iv[8];
+  unsigned int contentLen, encryptedContentLen, encryptedSignatureLen,
+    encryptedKeyLen;
+
+  /* Set up a break point with a do {} while (0) so that we can
+       zeroize the sensitive buffers before exiting.
+   */
+  do {
+    if (ReadText
+        (content, &contentLen, sizeof (content),
+         "  Enter filename of content to seal (blank to cancel): "))
+      break;
+    if (ENCRYPTED_CONTENT_LEN (contentLen) > sizeof (encryptedContent)) {
+      PrintError ("ERROR: Not enough room to encrypt the content.", 0);
+      break;
+    }
+  
+    if (GetPrivateKey
+        (&privateKey,
+         "  Sign as user with private key 1, 2, or 3? (blank to cancel): "))
+      break;
+    if (GetPublicKey
+        (&publicKey,
+         "  Seal for user with public key 1, 2, or 3? (blank to cancel): "))
+      break;
+  
+    if (status = R_SealPEMBlock
+        (encryptedContent, &encryptedContentLen, encryptedKey,
+         &encryptedKeyLen, encryptedSignature, &encryptedSignatureLen, iv,
+         content, contentLen, DIGEST_ALGORITHM, publicKey, privateKey,
+         randomStruct)) {
+      PrintError ("sealing file", status);
+      break;
+    }
+  
+    if (WriteBlock
+        (encryptedSignature, encryptedSignatureLen,
+         "  Enter filename to save the signature (blank to cancel): "))
+      break;  
+    if (WriteBlock
+        (encryptedKey, encryptedKeyLen,
+         "  Enter filename to save the encrypted key (blank to cancel): "))
+      break;
+    if (WriteBlock
+        (iv, 8, "  Enter filename to save the key's IV (blank to cancel): "))
+      break;  
+    if (WriteBlock
+        (encryptedContent, encryptedContentLen,
+        "  Enter filename to save the encrypted content (blank to cancel): "))
+      break;
+  } while (0);
+  
+  memset ((POINTER)content, 0, sizeof (content));
+}
+
+static void DoVerifyFile ()
+{
+  R_RSA_PUBLIC_KEY *publicKey;
+  char command[80];
+  int status, recodeFlag;
+  unsigned char content[1000], encodedContent[1000],
+    encodedSignature[MAX_PEM_SIGNATURE_LEN];
+  unsigned int contentLen, encodedContentLen, encodedSignatureLen;
+  
+  GetCommand
+    (command, sizeof (command),
+     "  Is the file to verify ASCII recoded [y/n] ? (blank to cancel): ");
+  if (! *command)
+    return;  
+  
+  if (*command == 'y' || *command == 'Y') {
+    recodeFlag = 1;
+
+    if (ReadBlock
+        (encodedContent, &encodedContentLen, sizeof (encodedContent),
+         "  Enter name of file to decode and verify (blank to cancel): "))
+      return;
+    if (DECODED_CONTENT_LEN (encodedContentLen) > sizeof (content)) {
+      PrintError ("ERROR: Not enough room to recode the content", 0);
+      return;
+    }
+  }
+  else {
+    recodeFlag = 0;
+    if (ReadText
+        (encodedContent, &encodedContentLen, sizeof (encodedContent),
+         "  Enter name of file to verify (blank to cancel): "))
+      return;
+  }
+
+  if (ReadBlock
+      (encodedSignature, &encodedSignatureLen, sizeof (encodedSignature),
+       "  Enter filename of signature (blank to cancel): "))
+    return;
+
+  if (GetPublicKey
+      (&publicKey,
+       "  Verify signature from user with public key 1, 2, or 3? (blank to cancel): "))
+    return;
+  
+  if (status = R_VerifyPEMSignature
+      (content, &contentLen, encodedContent, encodedContentLen,
+       encodedSignature, encodedSignatureLen, recodeFlag, DIGEST_ALGORITHM,
+       publicKey)) {
+    PrintError ("verifying file", status);
+    return;
+  }
+  else
+    PrintMessage ("Signature verified.");
+  
+  if (recodeFlag) {
+    if (WriteBlock
+        (content, contentLen,
+         "  Enter filename to save the content (blank to cancel): "))
+      return;
+  }
+}
+
+static void DoOpenFile ()
+{
+  R_RSA_PRIVATE_KEY *privateKey;
+  R_RSA_PUBLIC_KEY *publicKey;
+  int status;
+  unsigned char content[1000], encryptedContent[1000],
+    encryptedSignature[MAX_PEM_ENCRYPTED_SIGNATURE_LEN],
+    encryptedKey[MAX_PEM_ENCRYPTED_KEY_LEN], iv[8];
+  unsigned int contentLen, encryptedContentLen, encryptedSignatureLen,
+    encryptedKeyLen, ivLen;
+
+  /* Set up a break point with a do {} while (0) so that we can
+       zeroize the sensitive buffers before exiting.
+   */
+  do {
+    if (ReadBlock
+        (encryptedContent, &encryptedContentLen, sizeof (encryptedContent),
+         "  Enter filename of content to open (blank to cancel): "))
+      break;
+    if (DECRYPTED_CONTENT_LEN (encryptedContentLen) > sizeof (content)) {
+      PrintError ("ERROR: Not enough room to decrypt the content.", 0);
+      break;
+    }
+  
+    if (ReadBlock
+        (encryptedSignature, &encryptedSignatureLen,
+         sizeof (encryptedSignature),
+         "  Enter filename the signature (blank to cancel): "))
+      break;  
+    if (ReadBlock
+        (encryptedKey, &encryptedKeyLen, sizeof (encryptedKey),
+         "  Enter filename of the encrypted key (blank to cancel): "))
+      break;  
+    if (ReadBlock
+        (iv, &ivLen, 8,
+         "  Enter filename of the key's IV (blank to cancel): "))
+      break;  
+
+    if (GetPublicKey
+        (&publicKey,
+         "  Verify signature from user with public key 1, 2, or 3? (blank to cancel): "))
+      break;
+    if (GetPrivateKey
+        (&privateKey,
+         "  Open for user with private key 1, 2, or 3? (blank to cancel): "))
+      break;
+    
+    if (status = R_OpenPEMBlock
+        (content, &contentLen, encryptedContent, encryptedContentLen,
+         encryptedKey, encryptedKeyLen, encryptedSignature,
+         encryptedSignatureLen, iv, DIGEST_ALGORITHM, privateKey,
+         publicKey)) {
+      PrintError ("opening enveloped file", status);
+      break;
+    }
+    else
+      PrintMessage ("Signature verified.");
+  
+    if (WriteBlock
+        (content, contentLen,
+         "  Enter filename to save the decrypted content (blank to cancel): "))
+      break;
+  } while (0);
+  
+  memset ((POINTER)content, 0, sizeof (content));
+}
+
+static void DoGenerateKeys (randomStruct)
+R_RANDOM_STRUCT *randomStruct;
+{
+  R_RSA_PROTO_KEY protoKey;
+  char command[80];
+  int status, keySize;
+
+  GetCommand
+    (command, sizeof (command),
+     "  Enter key size in bits, (508 to 1024) (blank to cancel): ");
+  if (! *command)
+    return;
+  sscanf (command, "%d", &keySize);
+  
+  protoKey.bits = (unsigned int)keySize;
+  protoKey.useFermat4 = 1;
+  
+  if (status = R_GeneratePEMKeys
+      (&PUBLIC_KEY3, &PRIVATE_KEY3, &protoKey, randomStruct)) {
+    PrintError ("generating keys", status);
+    return;
+  }
+
+  PrintMessage ("Public key 3 and private key 3 are now ready to use.");
+  KEYPAIR3_READY = 1;
+  
+  WriteKeypair3 ();
+}
+
+static void WriteKeypair3 ()
+{
+  FILE *file;
+  char filename[256];
+  
+  while (1) {
+    GetCommand
+      (filename, sizeof (filename),
+       "Enter filename to save the keypair (blank to not save): ");
+    if (! *filename)
+      return;
+    
+    if (filename[0] == '-' && filename[1] == '\0') {
+      /* use stdout */
+      file = stdout;
+      break;
+    }
+    if ((file = fopen (filename, "w")) != NULL)
+      /* successfully opened */
+      break;
+    
+    PrintError ("ERROR: Cannot open a file with that name.  Try again.", 0);
+  }
+
+  fprintf (file, "Public Key, %u bits:\n", PUBLIC_KEY3.bits);
+  fprintf (file, "  modulus: ");
+  WriteBigInteger (file, PUBLIC_KEY3.modulus, sizeof (PUBLIC_KEY3.modulus));
+  fprintf (file, "  exponent: ");
+  WriteBigInteger (file, PUBLIC_KEY3.exponent, sizeof (PUBLIC_KEY3.exponent));
+
+  fprintf (file, "\nPrivate Key, %u bits:\n", PRIVATE_KEY3.bits);
+  fprintf (file, "  modulus: ");
+  WriteBigInteger (file, PRIVATE_KEY3.modulus, sizeof (PRIVATE_KEY3.modulus));
+  fprintf (file, "  public exponent: ");
+  WriteBigInteger
+    (file, PRIVATE_KEY3.publicExponent, sizeof (PRIVATE_KEY3.publicExponent));
+  fprintf (file, "  exponent: ");
+  WriteBigInteger
+    (file, PRIVATE_KEY3.exponent, sizeof (PRIVATE_KEY3.exponent));
+  fprintf (file, "  prime 1: ");
+  WriteBigInteger
+    (file, PRIVATE_KEY3.prime[0], sizeof (PRIVATE_KEY3.prime[0]));
+  fprintf (file, "  prime 2: ");
+  WriteBigInteger
+    (file, PRIVATE_KEY3.prime[1], sizeof (PRIVATE_KEY3.prime[1]));
+  fprintf (file, "  prime exponent 1: ");
+  WriteBigInteger
+    (file, PRIVATE_KEY3.primeExponent[0],
+     sizeof (PRIVATE_KEY3.primeExponent[0]));
+  fprintf (file, "  prime exponent 2: ");
+  WriteBigInteger
+    (file, PRIVATE_KEY3.primeExponent[1],
+     sizeof (PRIVATE_KEY3.primeExponent[1]));
+  fprintf (file, "  coefficient: ");
+  WriteBigInteger
+    (file, PRIVATE_KEY3.coefficient, sizeof (PRIVATE_KEY3.coefficient));
+
+  if (file != stdout)
+    fclose (file);
+}
+
+/* Write the byte string 'integer' to 'file', skipping over leading zeros.
+ */
+static void WriteBigInteger (file, integer, integerLen)
+FILE *file;
+unsigned char *integer;
+unsigned int integerLen;
+{
+  while (*integer == 0 && integerLen > 0) {
+    integer++;
+    integerLen--;
+  }
+  
+  if (integerLen == 0) {
+    /* Special case, just print a zero. */
+    fprintf (file, "00\n");
+    return;
+  }
+  
+  for (; integerLen > 0; integerLen--)
+    fprintf (file, "%02x ", (unsigned int)(*integer++));
+
+  fprintf (file, "\n");
+}
+
+/* Use the prompt to ask the user to use public key 1, 2 or 3 and
+     point publicKey to the answer.
+   Return 0 on success or 1 if user cancels by entering a blank.
+ */
+static int GetPublicKey (publicKey, prompt)
+R_RSA_PUBLIC_KEY **publicKey;
+char *prompt;
+{
+  char command[80];
+  
+  while (1) {
+    GetCommand (command, sizeof (command), prompt);
+
+    switch (*command) {
+    case '\0':
+      return (1);
+      
+    case '1':
+      *publicKey = &PUBLIC_KEY1;
+      return (0);
+      
+    case '2':
+      *publicKey = &PUBLIC_KEY2;
+      return (0);
+      
+    case '3':
+      if (!KEYPAIR3_READY) {
+        PrintError
+          ("ERROR: Public key 3 has not been generated yet.  Try Again.", 0);
+        break;
+      }
+      else {
+        *publicKey = &PUBLIC_KEY3;
+        return (0);
+      }
+      
+    default:
+      if (KEYPAIR3_READY)
+        PrintError ("ERROR: Please enter 1, 2 or 3.  Try again.", 0);
+      else
+        PrintError ("ERROR: Please enter 1 or 2.  Try again.", 0);
+      break;
+    }
+  }
+}
+
+/* Use the prompt to ask the user to use private key 1, 2 or 3 and
+     point privateKey to the answer.
+   Return 0 on success or 1 if user cancels by entering a blank.
+ */
+static int GetPrivateKey (privateKey, prompt)
+R_RSA_PRIVATE_KEY **privateKey;
+char *prompt;
+{
+  char command[80];
+  
+  while (1) {
+    GetCommand (command, sizeof (command), prompt);
+
+    switch (*command) {
+    case '\0':
+      return (1);
+      
+    case '1':
+      *privateKey = &PRIVATE_KEY1;
+      return (0);
+      
+    case '2':
+      *privateKey = &PRIVATE_KEY2;
+      return (0);
+      
+    case '3':
+      if (!KEYPAIR3_READY) {
+        PrintError
+          ("ERROR: Private key 3 has not been generated yet.  Try Again.", 0);
+        break;
+      }
+      else {
+        *privateKey = &PRIVATE_KEY3;
+        return (0);
+      }
+      
+    default:
+      if (KEYPAIR3_READY)
+        PrintError ("ERROR: Please enter 1, 2 or 3.  Try again.", 0);
+      else
+        PrintError ("ERROR: Please enter 1 or 2.  Try again.", 0);
+      break;
+    }
+  }
+}
+
+/* Read a file of up to length maxBlockLen bytes, storing it in
+     block and returning its length in blockLen.
+   Ask for the filename using the given prompt string.
+   Return 0 on success or 1 if error or if user cancels by entering a blank.
+ */
+static int ReadBlock (block, blockLen, maxBlockLen, prompt) 
+unsigned char *block;
+unsigned int *blockLen;
+unsigned int maxBlockLen;
+char *prompt;
+{
+  FILE *file;
+  int status;
+  char filename[256];
+  unsigned char dummy;
+  
+  while (1) {
+    GetCommand (filename, sizeof (filename), prompt);
+    if (! *filename)
+      return (1);
+    
+    if ((file = fopen (filename, "rb")) != NULL)
+      /* successfully opened */
+      break;
+    
+    PrintError ("ERROR: Cannot open a file with that name.  Try again.", 0);
+  }
+  
+  /* fread () returns the number of items read in.  Expect an end of file
+       after the read.
+   */
+  *blockLen = fread (block, 1, maxBlockLen, file);
+  if (*blockLen == maxBlockLen)
+    /* Read exactly maxBlockLen bytes, so reading one more will set 
+         end of file if there were exactly maxBlockLen bytes in the file.
+     */
+    fread (&dummy, 1, 1, file);
+  
+  if (!feof (file)) {
+    PrintError ("ERROR: Cannot read file or file is too large.", 0);
+    status = 1;
+  }
+  else
+    status = 0;
+  
+  fclose (file);
+  return (status);
+}
+
+/* Read a file of up to length maxBlockLen bytes, storing it in
+     block and returning its length in blockLen.
+   Ask for the filename using the given prompt string.
+   Read the file using fgets and convert all end of line characters to the
+     canonical CR/LF.
+   Return 0 on success or 1 if error or if user cancels by entering a blank.
+ */
+static int ReadText (block, blockLen, maxBlockLen, prompt) 
+unsigned char *block;
+unsigned int *blockLen;
+unsigned int maxBlockLen;
+char *prompt;
+{
+  FILE *file;
+  int status;
+  char filename[256];
+  unsigned int lineLen;
+  
+  while (1) {
+    GetCommand (filename, sizeof (filename), prompt);
+    if (! *filename)
+      return (1);
+    
+    if ((file = fopen (filename, "rb")) != NULL)
+      /* successfully opened */
+      break;
+    
+    PrintError ("ERROR: Cannot open a file with that name.  Try again.", 0);
+  }
+
+  status = 0;
+  *blockLen = 0;
+  while (1) {
+    /* fgets returns a null-terminated string which includes the end of
+       line characters.
+     */
+    if (fgets ((char *)(block + *blockLen), maxBlockLen - *blockLen, file)
+        == NULL) {
+      if (!feof (file))
+        status = 1;        
+      break;
+    }
+      
+    /* Strip of end of line characters.
+     */
+    lineLen = strlen ((char *)(block + *blockLen));
+    while (lineLen > 0 && block[*blockLen + lineLen - 1] == 10 ||
+           block[*blockLen + lineLen - 1] == 13)
+      lineLen --;
+    
+    /* Now try to add CR/LF.
+     */
+    (*blockLen) += lineLen;
+    if (*blockLen + 2 > maxBlockLen) {
+      /* Not enough room for CR/LF. */
+      status = 1;
+      break;
+    }
+    block[(*blockLen)++] = 13;
+    block[(*blockLen)++] = 10;
+  }
+  
+  if (status)
+    PrintError ("ERROR: Cannot read file or file is too large.", 0);  
+  fclose (file);
+  return (status);
+}
+
+/* Write block oflength blockLen to a file.
+   Ask for the filename using the given prompt string.
+   Return 0 on success or 1 if error or if user cancels by entering a blank.
+ */
+static int WriteBlock (block, blockLen, prompt) 
+unsigned char *block;
+unsigned int blockLen;
+char *prompt;
+{
+  FILE *file;
+  int status;
+  char filename[256];
+  
+  while (1) {
+    GetCommand (filename, sizeof (filename), prompt);
+    if (! *filename)
+      return (1);
+    
+    if (filename[0] == '-' && filename[1] == '\0') {
+      /* use stdout */
+      file = stdout;
+      break;
+    }
+    if ((file = fopen (filename, "wb")) != NULL)
+      /* successfully opened */
+      break;
+    
+    PrintError ("ERROR: Cannot open a file with that name.  Try again.", 0);
+  }
+  
+  status = 0;
+  if (fwrite (block, 1, blockLen, file) < blockLen) {
+    PrintError ("ERROR: Cannot write file.", 0);
+    status = 1;
+  }
+  else {
+    if (file == stdout)
+      /* Printing to screen, so print a new line. */
+      printf ("\n");
+  }
+
+  if (file != stdout)
+    fclose (file);
+  return (status);
+}
+
+static void PrintMessage (message)
+char *message;
+{
+  if (!SILENT_PROMPT) {
+    puts (message);
+    fflush (stdout);
+  }
+}
+
+/* If type is zero, simply print the task string, otherwise convert the
+     type to a string and print task and type.
+ */
+static void PrintError (task, type)
+char *task;
+int type;
+{
+  char *typeString, buf[80];
+
+  if (type == 0) {
+    puts (task);
+    return;
+  }
+  
+  /* Convert the type to a string if it is recognized.
+   */
+  switch (type) {
+  case RE_CONTENT_ENCODING:
+    typeString = "(Encrypted) content has RFC 1113 encoding error";
+    break;
+  case RE_DIGEST_ALGORITHM:
+    typeString = "Message-digest algorithm is invalid";
+    break;
+  case RE_KEY:
+    typeString = "Recovered DES key cannot decrypt encrypted content or encrypt signature";
+    break;
+  case RE_KEY_ENCODING:
+    typeString = "Encrypted key has RFC 1113 encoding error";
+    break;
+  case RE_MODULUS_LEN:
+    typeString = "Modulus length is invalid";
+    break;
+  case RE_NEED_RANDOM:
+    typeString = "Random structure is not seeded";
+    break;
+  case RE_PRIVATE_KEY:
+    typeString = "Private key cannot encrypt message digest, or cannot decrypt encrypted key";
+    break;
+  case RE_PUBLIC_KEY:
+    typeString = "Public key cannot encrypt DES key, or cannot decrypt signature";
+    break;
+  case RE_SIGNATURE:
+    typeString = "Signature on content or block is incorrect";
+    break;
+  case RE_SIGNATURE_ENCODING:
+    typeString = "(Encrypted) signature has RFC 1113 encoding error";
+    break;
+    
+  default:
+    sprintf (buf, "Code 0x%04x", type);
+    typeString = buf;
+  }
+
+  printf ("ERROR: %s while %s\n", typeString, task);  
+  fflush (stdout);
+}
+
+static void GetCommand (command, maxCommandSize, prompt)
+char *command;
+unsigned int maxCommandSize;
+char *prompt;
+{
+  unsigned int i;
+  
+  if (!SILENT_PROMPT) {
+    printf ("%s\n", prompt);  
+    fflush (stdout);
+  }
+
+  fgets (command, maxCommandSize, stdin);
+  
+  /* Replace the line terminator with a '\0'.
+   */
+  for (i = 0; command[i] != '\0'; i++) {
+    if (command[i] == '\012' || command[i] == '\015' ||
+        i == (maxCommandSize - 1)) {
+      command[i] = '\0';
+      return;
+    }
+  }
+}
+