imapfilter/imapfilter/passwd.c

#include <stdio.h>
#include <string.h>

#include "imapfilter.h"
#include "data.h"


static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";


/*
 * Get password from user interactively.
 */
void get_password(char *user, char *serv, char *passwd)
{
    char *c;
    
    tty_store();
    
    printf("Enter password for %s@%s: ", user, serv);
    
    tty_disable_echo();
    
    if (fgets(passwd, PASSWORD_LEN, stdin))
        if ((c = strchr(passwd, '\n')))
            *c = 0;
    
    tty_restore();

    putchar('\n');
}


/*
 * Encode in base64/radix64 a sequence of three characters.
 */
char *base64_encode(char *dest, char *src, int n)
{
    if (n == 2)
        src[2] = 0;
    if (n == 1)
        src[1] = 0;
    
    dest[0] = base64[src[0] >> 2];
    dest[1] = base64[((src[0] & 0x03) << 4) | (src[1] >> 4)];
    dest[2] = base64[((src[1] & 0x0f) << 2) | (src[2] >> 6)];
    dest[3] = base64[src[2] & 0x3f];
    
    if (n <= 2)
        dest[3] = '=';
    if (n <= 1)
        dest[2] = '=';
    
    return dest;
}


/*
 * Decode from base64/radix64 a sequence of four characters.
 */
int base64_decode(char *dest, char *src)
{
    int n, i, t;
    char tmp[4];
        
    if (src[2] == '=') {
        n = 1;
        src[2] = src[3] = 0;
    } else if (src[3] == '=') {
        n = 2;
        src[3] = 0;
    } else
        n = 3;
    
    for (i = 0; i < 4; i++) {
        t = strchr(base64, src[i]) - base64;
        if (t == 64)
            tmp[i] = 0;
        else
            tmp[i] = t;
    }
    
    dest[0] = (tmp[0] << 2) | (tmp[1] >> 4);
    dest[1] = (tmp[1] << 4) | (tmp[2] >> 2);
    dest[2] = (tmp[2] << 6) | tmp[3];
    
    return n;
}
1	#include <stdio.h>
2	#include <string.h>
3
4	#include "imapfilter.h"
5	#include "data.h"
6
7
8	static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
9
10
11	/*
12	* Get password from user interactively.
13	*/
14	void get_password(char user, char serv, char *passwd)
15	{
16	char *c;
17
18	tty_store();
19
20	printf("Enter password for %s@%s: ", user, serv);
21
22	tty_disable_echo();
23
24	if (fgets(passwd, PASSWORD_LEN, stdin))
25	if ((c = strchr(passwd, '\n')))
26	*c = 0;
27
28	tty_restore();
29
30	putchar('\n');
31	}
32
33
34	/*
35	* Encode in base64/radix64 a sequence of three characters.
36	*/
37	char base64_encode(char dest, char *src, int n)
38	{
39	if (n == 2)
40	src[2] = 0;
41	if (n == 1)
42	src[1] = 0;
43
44	dest[0] = base64[src[0] >> 2];
45	dest[1] = base64[((src[0] & 0x03) << 4) \| (src[1] >> 4)];
46	dest[2] = base64[((src[1] & 0x0f) << 2) \| (src[2] >> 6)];
47	dest[3] = base64[src[2] & 0x3f];
48
49	if (n <= 2)
50	dest[3] = '=';
51	if (n <= 1)
52	dest[2] = '=';
53
54	return dest;
55	}
56
57
58	/*
59	* Decode from base64/radix64 a sequence of four characters.
60	*/
61	int base64_decode(char dest, char src)
62	{
63	int n, i, t;
64	char tmp[4];
65
66	if (src[2] == '=') {
67	n = 1;
68	src[2] = src[3] = 0;
69	} else if (src[3] == '=') {
70	n = 2;
71	src[3] = 0;
72	} else
73	n = 3;
74
75	for (i = 0; i < 4; i++) {
76	t = strchr(base64, src[i]) - base64;
77	if (t == 64)
78	tmp[i] = 0;
79	else
80	tmp[i] = t;
81	}
82
83	dest[0] = (tmp[0] << 2) \| (tmp[1] >> 4);
84	dest[1] = (tmp[1] << 4) \| (tmp[2] >> 2);
85	dest[2] = (tmp[2] << 6) \| tmp[3];
86
87	return n;
88	}