kcrypt_fp.c

最終更新：2009/10/18

kcrypt_fp.c

001: /* kcrypt_fp.c
002:  * 暗号化・復号のサンプル
003:  */
004: 
005: #define USAGE "Usage: kcrypt <cipher_alg> <enc | dec> <input_file> <output_file>"
006: /*
007: cipher_alg = "camellia-128-cbc"
008: */
009: 
010: 
011: #include <stdio.h>
012: #include <string.h>
013: #include <openssl/evp.h>
014: /*
015: #include <openssl/err.h>
016: #include <openssl/crypto.h>
017: */
018: 
019: #include "mycipher_fp.h"
020: 
021: int main (int ac, char **av) {
022:   
023:   
024:   char *cipher_alg = NULL;
025:   char *encdec = NULL;
026:   char *input_file = NULL;
027:   char *output_file = NULL;
028:   int enc = 0;
029:   
030:   if (ac < 5) {
031:     fprintf(stderr, "%s\n", USAGE);
032:     goto _ERROR_;
033:   }
034:   
035:   cipher_alg = av[1];
036:   encdec = av[2];
037:   input_file = av[3];
038:   output_file = av[4];
039:   
040:   if (!strcmp(encdec, "enc")) {
041:     enc = 1;
042:   }
043:   
044:   if (1) {
045:     FILE *fpin = NULL;
046:     FILE *fpout = NULL;
047:   
048:     /* メモ：鍵やＩＶは乱数にするのが普通だけど…。 */
049: 
050:     if (!(fopen_s(&fpin, input_file, "rb")) && !(fopen_s(&fpout, output_file, "wb"))) {
051:       if (enc) {
052:         kencrypt_from_FP_to_FP(cipher_alg, "0123456789ABCDEF", 16, "This is a pencil", 16, fpin, fpout);
053:       } else {
054:         kdecrypt_from_FP_to_FP(cipher_alg, "0123456789ABCDEF", 16, "This is a pencil", 16, fpin, fpout);
055:       }
056:     
057:       fclose(fpout);
058:       fclose(fpin);
059:     }
060:   }
061:   
062:   printf("\ndone.\n");
063: 
064:   return 0; /* 正常終了 */
065:   
066:   _ERROR_:
067: 
068:   fprintf(stderr, "failed!\n");
069: 
070:   return 1; /* 異常終了 */
071: 
072: } /* end of main */
073: 

KAKU PROJECT (2009)