#if defined(ENABLE_HTTP_PROXY) || defined(ENABLE_PKCS11)

 
 #include "base64.h"
 
 #include "memdbg.h"
 
 static char base64_chars[] = 
     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
 int 
 base64_encode(const void *data, int size, char **str)
 {
     char *s, *p;
     int i;
     int c;
     const unsigned char *q;
 
     p = s = (char *) malloc(size * 4 / 3 + 4);
     if (p == NULL)
 	return -1;
     q = (const unsigned char *) data;
     i = 0;
     for (i = 0; i < size;) {
 	c = q[i++];
 	c *= 256;
 	if (i < size)
 	    c += q[i];
 	i++;
 	c *= 256;
 	if (i < size)
 	    c += q[i];
 	i++;
 	p[0] = base64_chars[(c & 0x00fc0000) >> 18];
 	p[1] = base64_chars[(c & 0x0003f000) >> 12];
 	p[2] = base64_chars[(c & 0x00000fc0) >> 6];
 	p[3] = base64_chars[(c & 0x0000003f) >> 0];
 	if (i > size)
 	    p[3] = '=';
 	if (i > size + 1)
 	    p[2] = '=';
 	p += 4;
     }
     *p = 0;
     *str = s;
     return strlen(s);
 }
 

 #if NTLM
 
 static int 
 pos(char c)
 {
     char *p;
     for (p = base64_chars; *p; p++)
 	if (*p == c)
 	    return p - base64_chars;
     return -1;
 }
 

 #define DECODE_ERROR 0xffffffff
 
 static unsigned int
 token_decode(const char *token)
 {
     int i;
     unsigned int val = 0;
     int marker = 0;
     if (strlen(token) < 4)
 	return DECODE_ERROR;
     for (i = 0; i < 4; i++) {
 	val *= 64;
 	if (token[i] == '=')
 	    marker++;
 	else if (marker > 0)
 	    return DECODE_ERROR;
 	else
 	    val += pos(token[i]);
     }
     if (marker > 2)
 	return DECODE_ERROR;
     return (marker << 24) | val;
 }
 
 int
 base64_decode(const char *str, void *data)
 {
     const char *p;
     unsigned char *q;
 
     q = data;
     for (p = str; *p && (*p == '=' || strchr(base64_chars, *p)); p += 4) {
 	unsigned int val = token_decode(p);
 	unsigned int marker = (val >> 24) & 0xff;
 	if (val == DECODE_ERROR)
 	    return -1;
 	*q++ = (val >> 16) & 0xff;
 	if (marker < 2)
 	    *q++ = (val >> 8) & 0xff;
 	if (marker < 1)
 	    *q++ = val & 0xff;
     }
     return q - (unsigned char *) data;
 }
 

 #endif /* NTLM, PKCS#11 */

 #else
 static void dummy(void) {}
 #endif