151462Smarkm/*
251462Smarkm * Copyright (c) 1999
351462Smarkm *      University of California.  All rights reserved.
451462Smarkm *
551462Smarkm * Redistribution and use in source and binary forms, with or without
651462Smarkm * modification, are permitted provided that the following conditions
751462Smarkm * are met:
851462Smarkm * 1. Redistributions of source code must retain the above copyright
951462Smarkm *    notice, this list of conditions and the following disclaimer.
1051462Smarkm * 2. Redistributions in binary form must reproduce the above copyright
1151462Smarkm *    notice, this list of conditions and the following disclaimer in the
1251462Smarkm *    documentation and/or other materials provided with the distribution.
1351462Smarkm * 3. Neither the name of the author nor the names of any co-contributors
1451462Smarkm *    may be used to endorse or promote products derived from this software
1551462Smarkm *    without specific prior written permission.
1651462Smarkm *
1751462Smarkm * THIS SOFTWARE IS PROVIDED BY CONTRIBUTORS ``AS IS'' AND ANY EXPRESS
1851462Smarkm * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
1951462Smarkm * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2051462Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY
2151462Smarkm * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2251462Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
2351462Smarkm * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
2451462Smarkm * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
2551462Smarkm * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
2651462Smarkm * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
2751462Smarkm * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
2851462Smarkm */
2951462Smarkm
3083551Sdillon#include <sys/cdefs.h>
3183551Sdillon__FBSDID("$FreeBSD$");
3283551Sdillon
3391754Smarkm#include <sys/types.h>
3491754Smarkm
3591754Smarkm#include "crypt.h"
3691754Smarkm
3791754Smarkmstatic char itoa64[] =		/* 0 ... 63 => ascii - 64 */
3851462Smarkm	"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
3951462Smarkm
4051462Smarkmvoid
4191754Smarkm_crypt_to64(char *s, u_long v, int n)
4251462Smarkm{
4351462Smarkm	while (--n >= 0) {
4451462Smarkm		*s++ = itoa64[v&0x3f];
4551462Smarkm		v >>= 6;
4651462Smarkm	}
4751462Smarkm}
48220497Smarkm
49220497Smarkmvoid
50220497Smarkmb64_from_24bit(uint8_t B2, uint8_t B1, uint8_t B0, int n, int *buflen, char **cp)
51220497Smarkm{
52220497Smarkm	uint32_t w;
53220497Smarkm	int i;
54220497Smarkm
55220497Smarkm	w = (B2 << 16) | (B1 << 8) | B0;
56220497Smarkm	for (i = 0; i < n; i++) {
57220497Smarkm		**cp = itoa64[w&0x3f];
58220497Smarkm		(*cp)++;
59220497Smarkm		if ((*buflen)-- < 0)
60220497Smarkm			break;
61220497Smarkm		w >>= 6;
62220497Smarkm	}
63220497Smarkm}
64