[thirdparty/openssl.git] / demos / maurice / example3.c

/* NOCW */
/*
        Please read the README file for condition of use, before
        using this software.

        Maurice Gittens  <mgittens@gits.nl>   January 1997

*/

#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <evp.h>

#define STDIN     	0
#define STDOUT    	1
#define BUFLEN	  	512 
#define INIT_VECTOR 	"12345678"
#define ENCRYPT		1
#define DECRYPT         0
#define ALG		EVP_des_ede3_cbc()

static const char *usage = "Usage: example3 [-d] password\n";

void do_cipher(char *,int);

int main(int argc, char *argv[])
{
	if ((argc == 2))	
	{
		do_cipher(argv[1],ENCRYPT);
	}	
	else if ((argc == 3) && !strcmp(argv[1],"-d"))
	{
		do_cipher(argv[2],DECRYPT);
	}
	else
	{
		fprintf(stderr,"%s", usage);
		exit(1);
	}

	return 0;		
}

void do_cipher(char *pw, int operation)
{
	char buf[BUFLEN];
	char ebuf[BUFLEN + 8];
	unsigned int ebuflen, rc;
        unsigned char iv[EVP_MAX_IV_LENGTH], key[EVP_MAX_KEY_LENGTH];
	unsigned int ekeylen, net_ekeylen; 
	EVP_CIPHER_CTX ectx;
        
	memcpy(iv, INIT_VECTOR, sizeof(iv));

	EVP_BytesToKey(ALG, EVP_md5(), "salu", pw, strlen(pw), 1, key, iv);

	EVP_CipherInit(&ectx, ALG, key, iv, operation);

	while(1)
	{
		int readlen = read(STDIN, buf, sizeof(buf));
	
		if (readlen <= 0)
		{
			if (!readlen)
			   break;
			else
			{
				perror("read");
				exit(1);
			}
		}

		EVP_CipherUpdate(&ectx, ebuf, &ebuflen, buf, readlen);

		write(STDOUT, ebuf, ebuflen);
	}

        EVP_CipherFinal(&ectx, ebuf, &ebuflen); 

	write(STDOUT, ebuf, ebuflen); 
}
Commit	Line	Data
d02b48c6 RE	1	/* NOCW */
	2	/*
	3	Please read the README file for condition of use, before
	4	using this software.
	5
	6	Maurice Gittens <mgittens@gits.nl> January 1997
	7
	8	*/
	9
	10	#include <stdio.h>
	11	#include <fcntl.h>
	12	#include <sys/stat.h>
	13	#include <evp.h>
	14
	15	#define STDIN 0
	16	#define STDOUT 1
	17	#define BUFLEN 512
	18	#define INIT_VECTOR "12345678"
	19	#define ENCRYPT 1
	20	#define DECRYPT 0
	21	#define ALG EVP_des_ede3_cbc()
	22
	23	static const char *usage = "Usage: example3 [-d] password\n";
	24
	25	void do_cipher(char *,int);
	26
	27	int main(int argc, char *argv[])
	28	{
	29	if ((argc == 2))
	30	{
	31	do_cipher(argv[1],ENCRYPT);
	32	}
	33	else if ((argc == 3) && !strcmp(argv[1],"-d"))
	34	{
	35	do_cipher(argv[2],DECRYPT);
	36	}
	37	else
	38	{
	39	fprintf(stderr,"%s", usage);
	40	exit(1);
	41	}
	42
	43	return 0;
	44	}
	45
	46	void do_cipher(char *pw, int operation)
	47	{
	48	char buf[BUFLEN];
	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;
	53	EVP_CIPHER_CTX ectx;
	54
	55	memcpy(iv, INIT_VECTOR, sizeof(iv));
	56
	57	EVP_BytesToKey(ALG, EVP_md5(), "salu", pw, strlen(pw), 1, key, iv);
	58
	59	EVP_CipherInit(&ectx, ALG, key, iv, operation);
	60
	61	while(1)
	62	{
	63	int readlen = read(STDIN, buf, sizeof(buf));
	64
65	if (readlen <= 0)
66	{
67	if (!readlen)
68	break;
69	else
70	{
71	perror("read");
72	exit(1);
73	}
74	}
75
76	EVP_CipherUpdate(&ectx, ebuf, &ebuflen, buf, readlen);
77
78	write(STDOUT, ebuf, ebuflen);
79	}
80
81	EVP_CipherFinal(&ectx, ebuf, &ebuflen);
82
83	write(STDOUT, ebuf, ebuflen);
84	}
85
86