3 Please read the README file for condition of use, before
6 Maurice Gittens <mgittens@gits.nl> January 1997
18 #define INIT_VECTOR "12345678"
21 #define ALG EVP_des_ede3_cbc()
23 static const char *usage = "Usage: example3 [-d] password\n";
25 void do_cipher(char *,int);
27 int main(int argc, char *argv[])
31 do_cipher(argv[1],ENCRYPT);
33 else if ((argc == 3) && !strcmp(argv[1],"-d"))
35 do_cipher(argv[2],DECRYPT);
39 fprintf(stderr,"%s", usage);
46 void do_cipher(char *pw, int operation)
49 char ebuf[BUFLEN + 8];
50 unsigned int ebuflen, rc;
51 unsigned char iv[EVP_MAX_IV_LENGTH], key[EVP_MAX_KEY_LENGTH];
52 unsigned int ekeylen, net_ekeylen;
55 memcpy(iv, INIT_VECTOR, sizeof(iv));
57 EVP_BytesToKey(ALG, EVP_md5(), "salu", pw, strlen(pw), 1, key, iv);
59 EVP_CipherInit(&ectx, ALG, key, iv, operation);
63 int readlen = read(STDIN, buf, sizeof(buf));
76 EVP_CipherUpdate(&ectx, ebuf, &ebuflen, buf, readlen);
78 write(STDOUT, ebuf, ebuflen);
81 EVP_CipherFinal(&ectx, ebuf, &ebuflen);
83 write(STDOUT, ebuf, ebuflen);