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/* from imtest.c -- IMAP/IMSP test client
* Cyrus IMAPd 1.5.2 <URL:ftp://ftp.andrew.cmu.edu/pub/cyrus-mail/cyrus-imapd-v1.5.2.tar.gz>
*
* Copyright 1996, Carnegie Mellon University. All Rights Reserved.
*
* This software is made available for academic and research
* purposes only. No commercial license is hereby granted.
* Copying and other reproduction is authorized only for research,
* education, and other non-commercial purposes. No warranties,
* either expressed or implied, are made regarding the operation,
* use, or results of the software. Such a release does not permit
* use of the code for commercial purposes or benefits by anyone
* without specific, additional permission by the owner of the code.
*
* Author: Chris Newman <chrisn+@cmu.edu>
* Start Date: 2/16/93
*/
/* base64 tables
*/
static char basis_64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static char index_64[128] = {
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1,-1,-1,-1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14,
15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
-1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
};
#define CHAR64(c) (((c) < 0 || (c) > 127) ? -1 : index_64[(c)])
void to64(out, in, inlen)
unsigned char *out, *in;
int inlen;
{
unsigned char oval;
while (inlen >= 3) {
*out++ = basis_64[in[0] >> 2];
*out++ = basis_64[((in[0] << 4) & 0x30) | (in[1] >> 4)];
*out++ = basis_64[((in[1] << 2) & 0x3c) | (in[2] >> 6)];
*out++ = basis_64[in[2] & 0x3f];
in += 3;
inlen -= 3;
}
if (inlen > 0) {
*out++ = basis_64[in[0] >> 2];
oval = (in[0] << 4) & 0x30;
if (inlen > 1) oval |= in[1] >> 4;
*out++ = basis_64[oval];
*out++ = (inlen < 2) ? '=' : basis_64[(in[1] << 2) & 0x3c];
*out++ = '=';
}
*out = '\0';
}
int from64(out, in)
char *out, *in;
{
int len = 0;
int c1, c2, c3, c4;
if (in[0] == '+' && in[1] == ' ') in += 2;
if (*in == '\r') return (0);
do {
c1 = in[0];
if (CHAR64(c1) == -1) return (-1);
c2 = in[1];
if (CHAR64(c2) == -1) return (-1);
c3 = in[2];
if (c3 != '=' && CHAR64(c3) == -1) return (-1);
c4 = in[3];
if (c4 != '=' && CHAR64(c4) == -1) return (-1);
in += 4;
*out++ = (CHAR64(c1) << 2) | (CHAR64(c2) >> 4);
++len;
if (c3 != '=') {
*out++ = ((CHAR64(c2) << 4) & 0xf0) | (CHAR64(c3) >> 2);
++len;
if (c4 != '=') {
*out++ = ((CHAR64(c3) << 6) & 0xc0) | CHAR64(c4);
++len;
}
}
} while (*in != '\r' && c4 != '=');
return (len);
}
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