OpenSolaris_b135/lib/libldap4/util/line64.c
/*
*
* Portions Copyright 07/23/97 Sun Microsystems, Inc. All Rights Reserved
*
*/
/* line64.c - routines for dealing with the slapd line format */
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include "lber.h"
#include "ldap.h"
#include "ldif.h"
#define RIGHT2 0x03
#define RIGHT4 0x0f
#define CONTINUED_LINE_MARKER '\001'
static char nib2b64[0x40f] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static unsigned char b642nib[0x80] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff
};
/*
* str_parse_line - takes a line of the form "type:[:] value" and splits it
* into components "type" and "value". if a double colon separates type from
* value, then value is encoded in base 64, and parse_line un-decodes it
* (in place) before returning.
*/
int
str_parse_line(
char *line,
char **type,
char **value,
int *vlen
)
{
char *p, *s, *d, *byte, *stop;
char nib;
int i = 0, b64 = 0;
int url = 0;
/* skip any leading space */
while ( isspace( *line ) ) {
line++;
}
*type = line;
for ( s = line; *s && *s != ':'; s++ )
; /* NULL */
if ( *s == '\0' ) {
Debug( LDAP_DEBUG_PARSE, catgets(slapdcat, 1, 263, "parse_line missing ':'\n"), 0, 0, 0 );
return( -1 );
}
/* trim any space between type and : */
for ( p = s - 1; p > line && isspace( *p ); p-- ) {
*p = '\0';
}
*s++ = '\0';
/* check for double : - indicates base 64 encoded value */
if ( *s == ':' ) {
s++;
b64 = 1;
} else if ( *s == '<' ) { /* the value indicates an url */
s++;
url = 1;
} else { /* single : - normally encoded value */
b64 = 0;
}
/* skip space between : and value */
while ( isspace( *s ) ) {
s++;
}
/* if no value is present, error out */
if ( *s == '\0' ) {
Debug( LDAP_DEBUG_PARSE, catgets(slapdcat, 1, 264, "parse_line missing value\n"), 0,0,0 );
return( -1 );
}
/* check for continued line markers that should be deleted */
for ( p = s, d = s; *p; p++ ) {
if ( *p != CONTINUED_LINE_MARKER )
*d++ = *p;
}
*d = '\0';
if ( b64 ) {
*value = s;
stop = strchr( s, '\0' );
byte = s;
for ( p = s, *vlen = 0; p < stop; p += 4, *vlen += 3 ) {
for ( i = 0; i < 3; i++ ) {
if ( p[i] != '=' && (p[i] & 0x80 ||
b642nib[ p[i] & 0x7f ] > 0x3f) ) {
Debug( LDAP_DEBUG_ANY,
catgets(slapdcat, 1, 265, "invalid base 64 encoding char (%1$c) 0x%2$x\n"),
p[i], p[i], 0 );
return( -1 );
}
}
/* first digit */
nib = b642nib[ p[0] & 0x7f ];
byte[0] = nib << 2;
/* second digit */
nib = b642nib[ p[1] & 0x7f ];
byte[0] |= nib >> 4;
byte[1] = (nib & RIGHT4) << 4;
/* third digit */
if ( p[2] == '=' ) {
*vlen += 1;
break;
}
nib = b642nib[ p[2] & 0x7f ];
byte[1] |= nib >> 2;
byte[2] = (nib & RIGHT2) << 6;
/* fourth digit */
if ( p[3] == '=' ) {
*vlen += 2;
break;
}
nib = b642nib[ p[3] & 0x7f ];
byte[2] |= nib;
byte += 3;
}
s[ *vlen ] = '\0';
} else if ( url ) { /* checks that the url is properly formed */
/* file://[localhost]/<pathname> */
/* value contains the content of the file */
char * s2;
char * filename;
FILE *fp;
int rlen;
int eof;
if ( strncmp(s, "file://localhost", 16) == 0 )
{
s = s+16;
}
else if ( strncmp(s, "file://", 7) == 0 )
{
s = s+7;
}
else
{
/* url badly formed */
Debug( LDAP_DEBUG_ANY, catgets(slapdcat, 1, 1289, "invalid url %s\n"), s, 0, 0);
return -1;
}
filename = strdup(s);
/* now we have the filename, read its content and return the value */
if (( fp = fopen( filename, "r" )) == NULL )
{
perror( filename );
return( -1 );
}
if ( fseek( fp, 0, SEEK_END ) != 0 )
{
perror( filename );
fclose( fp );
return( -1 );
}
*vlen = ftell(fp);
if ( (*value = (char *)malloc(*vlen)) == NULL )
{
perror("malloc");
fclose(fp);
return(-1);
}
if ( fseek( fp, 0, SEEK_SET ) != 0 )
{
perror( filename );
fclose( fp );
return( -1 );
}
rlen = fread( *value, 1, *vlen, fp );
eof = feof( fp );
fclose( fp );
if ( rlen != *vlen )
{
perror( filename );
return( -1 );
}
} else {
*value = s;
*vlen = (int) (d - s);
}
return( 0 );
}
/*
* str_getline - return the next "line" (minus newline) of input from a
* string buffer of lines separated by newlines, terminated by \n\n
* or \0. this routine handles continued lines, bundling them into
* a single big line before returning. if a line begins with a white
* space character, it is a continuation of the previous line. the white
* space character (nb: only one char), and preceeding newline are changed
* into CONTINUED_LINE_MARKER chars, to be deleted later by the
* str_parse_line() routine above.
*
* it takes a pointer to a pointer to the buffer on the first call,
* which it updates and must be supplied on subsequent calls.
*/
char *
str_getline( char **next )
{
char *l;
char c;
if ( *next == NULL || **next == '\n' || **next == '\0' ) {
return( NULL );
}
l = *next;
while ( (*next = strchr( *next, '\n' )) != NULL ) {
c = *(*next + 1);
if ( isspace( c ) && c != '\n' ) {
**next = CONTINUED_LINE_MARKER;
*(*next+1) = CONTINUED_LINE_MARKER;
} else {
*(*next)++ = '\0';
break;
}
*(*next)++;
}
return( l );
}
void
put_type_and_value( char **out, char *t, char *val, int vlen )
{
unsigned char *byte, *p, *stop;
unsigned char buf[3];
unsigned int bits;
char *save;
int i, b64, pad, len, savelen;
len = 0;
/* put the type + ": " */
for ( p = (unsigned char *) t; *p; p++, len++ ) {
*(*out)++ = *p;
}
*(*out)++ = ':';
len++;
save = *out;
savelen = len;
*(*out)++ = ' ';
b64 = 0;
stop = (unsigned char *) (val + vlen);
if ( isascii( val[0] ) && isspace( val[0] ) || val[0] == ':' ) {
b64 = 1;
} else {
for ( byte = (unsigned char *) val; byte < stop;
byte++, len++ ) {
if ( !isascii( *byte ) || !isprint( *byte ) ) {
b64 = 1;
break;
}
if ( len > LINE_WIDTH ) {
*(*out)++ = '\n';
*(*out)++ = ' ';
len = 1;
}
*(*out)++ = *byte;
}
}
if ( b64 ) {
*out = save;
*(*out)++ = ':';
*(*out)++ = ' ';
len = savelen + 2;
/* convert to base 64 (3 bytes => 4 base 64 digits) */
for ( byte = (unsigned char *) val; byte < stop - 2;
byte += 3 ) {
bits = (byte[0] & 0xff) << 16;
bits |= (byte[1] & 0xff) << 8;
bits |= (byte[2] & 0xff);
for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
if ( len > LINE_WIDTH ) {
*(*out)++ = '\n';
*(*out)++ = ' ';
len = 1;
}
/* get b64 digit from high order 6 bits */
*(*out)++ = nib2b64[ (bits & 0xfc0000) >> 18 ];
}
}
/* add padding if necessary */
if ( byte < stop ) {
for ( i = 0; byte + i < stop; i++ ) {
buf[i] = byte[i];
}
for ( pad = 0; i < 3; i++, pad++ ) {
buf[i] = '\0';
}
byte = buf;
bits = (byte[0] & 0xff) << 16;
bits |= (byte[1] & 0xff) << 8;
bits |= (byte[2] & 0xff);
for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
if ( len > LINE_WIDTH ) {
*(*out)++ = '\n';
*(*out)++ = ' ';
len = 1;
}
/* get b64 digit from low order 6 bits */
*(*out)++ = nib2b64[ (bits & 0xfc0000) >> 18 ];
}
for ( ; pad > 0; pad-- ) {
*(*out - pad) = '=';
}
}
}
*(*out)++ = '\n';
}
char *
ldif_type_and_value( char *type, char *val, int vlen )
/*
* return malloc'd, zero-terminated LDIF line
*/
{
char *buf, *p;
int tlen;
buf=NULL;
tlen = strlen( type );
if (( buf = (char *)malloc( LDIF_SIZE_NEEDED( tlen, vlen ) + 1 )) !=
NULL ) {
p = buf;
put_type_and_value( &p, type, val, vlen );
*p = '\0';
}
return( buf );
}