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	lefcha	1.1	#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			}