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openldap/libraries/libldif/line64.c
Kurt Zeilenga 9e450558d8 Fix add of empty value.
2000-10-03 22:05:28 +00:00

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/* line64.c - routines for dealing with the slapd line format */
/* $OpenLDAP$ */
/*
* Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include "portable.h"
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/ctype.h>
#include <ac/string.h>
#include <ac/socket.h>
#include <ac/time.h>
int ldif_debug = 0;
#include "ldap_log.h"
#include "lber_pvt.h"
#include "ldif.h"
#define RIGHT2 0x03
#define RIGHT4 0x0f
#define CONTINUED_LINE_MARKER '\001'
#ifdef CSRIMALLOC
#define ber_memalloc malloc
#define ber_memcalloc calloc
#define ber_memrealloc realloc
#define ber_strdup strdup
#endif
static const char nib2b64[0x40] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static const 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
};
/*
* ldif_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
ldif_parse_line(
LDAP_CONST char *line,
char **typep,
char **valuep,
ber_len_t *vlenp
)
{
char *s, *p, *d;
char nib;
int b64, url;
char *freeme, *type, *value;
ber_len_t vlen;
*typep = NULL;
*valuep = NULL;
*vlenp = 0;
/* skip any leading space */
while ( isspace( (unsigned char) *line ) ) {
line++;
}
freeme = ber_strdup( line );
if( freeme == NULL ) {
ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
"ldif_parse_line: line malloc failed\n");
return( -1 );
}
type = freeme;
s = strchr( type, ':' );
if ( s == NULL ) {
ber_pvt_log_printf( LDAP_DEBUG_PARSE, ldif_debug,
"ldif_parse_line: missing ':' after %s\n",
type );
ber_memfree( freeme );
return( -1 );
}
/* trim any space between type and : */
for ( p = &s[-1]; p > type && isspace( * (unsigned char *) p ); p-- ) {
*p = '\0';
}
*s++ = '\0';
url = 0;
b64 = 0;
if ( *s == '\0' ) {
/* no value */
value = "";
vlen = 0;
goto done;
}
if ( *s == '<' ) {
s++;
url = 1;
} else if ( *s == ':' ) {
/* base 64 encoded value */
s++;
b64 = 1;
}
/* skip space between : and value */
while ( isspace( (unsigned char) *s ) ) {
s++;
}
/* 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 no value is present, error out */
if ( *s == '\0' ) {
ber_pvt_log_printf( LDAP_DEBUG_PARSE, ldif_debug,
"ldif_parse_line: %s missing %svalue\n", type,
url ? "URL " : b64 ? "base64 " : "" );
value = NULL;
vlen = 0;
goto done;
}
if ( b64 ) {
char *byte = s;
value = s;
for ( p = s, vlen = 0; p < d; p += 4, vlen += 3 ) {
int i;
for ( i = 0; i < 4; i++ ) {
if ( p[i] != '=' && (p[i] & 0x80 ||
b642nib[ p[i] & 0x7f ] > 0x3f) ) {
ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
"ldif_parse_line: %s: invalid base64 encoding"
" char (%c) 0x%x\n",
type, p[i], p[i] );
ber_memfree( freeme );
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 ) {
if( ldif_fetch_url( s, &value, &vlen ) ) {
ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
"ldif_parse_line: %s: URL \"%s\" fetch failed\n",
type, s );
ber_memfree( freeme );
return( -1 );
}
} else {
value = s;
vlen = (int) (d - s);
}
done:
type = ber_strdup( type );
if( type == NULL ) {
ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
"ldif_parse_line: type malloc failed\n");
ber_memfree( freeme );
return( -1 );
}
if( !url && value != NULL ) {
p = ber_memalloc( vlen + 1 );
if( p == NULL ) {
ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
"ldif_parse_line: value malloc failed\n");
ber_memfree( type );
ber_memfree( freeme );
return( -1 );
}
AC_MEMCPY( p, value, vlen );
p[vlen] = '\0';
value = p;
}
ber_memfree( freeme );
*typep = type;
*valuep = value;
*vlenp = vlen;
return( 0 );
}
/*
* ldif_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
* ldif_parse_line() routine above.
*
* ldif_getline will skip over any line which starts '#'.
*
* ldif_getline takes a pointer to a pointer to the buffer on the first call,
* which it updates and must be supplied on subsequent calls.
*/
char *
ldif_getline( char **next )
{
char *line;
do {
if ( *next == NULL || **next == '\n' || **next == '\0' ) {
return( NULL );
}
line = *next;
while ( (*next = strchr( *next, '\n' )) != NULL ) {
unsigned char c = *(*next + 1);
if ( !isspace( c ) || c == '\n' ) {
*(*next)++ = '\0';
break;
}
**next = CONTINUED_LINE_MARKER;
*(*next+1) = CONTINUED_LINE_MARKER;
(*next)++;
}
} while( *line == '#' );
return( line );
}
/* compatibility with U-Mich off by one bug */
#define LDIF_KLUDGE 1
void
ldif_sput(
char **out,
int type,
LDAP_CONST char *name,
LDAP_CONST char *val,
ber_len_t vlen )
{
const unsigned char *byte, *stop;
unsigned char buf[3];
unsigned long bits;
char *save;
int pad;
ber_len_t savelen;
ber_len_t len=0;
ber_len_t i;
/* prefix */
switch( type ) {
case LDIF_PUT_COMMENT:
*(*out)++ = '#';
len++;
if( vlen ) {
*(*out)++ = ' ';
len++;
}
break;
case LDIF_PUT_SEP:
*(*out)++ = '\n';
return;
}
/* name (attribute type) */
if( name != NULL ) {
/* put the name + ":" */
for ( i=0 ; name[i]; i++ ) {
*(*out)++ = name[i];
len++;
}
if( type != LDIF_PUT_COMMENT ) {
*(*out)++ = ':';
len++;
}
}
#ifdef LDAP_DEBUG
else {
assert( type == LDIF_PUT_COMMENT );
}
#endif
if( vlen == 0 ) {
*(*out)++ = '\n';
return;
}
switch( type ) {
case LDIF_PUT_NOVALUE:
*(*out)++ = '\n';
return;
case LDIF_PUT_URL: /* url value */
*(*out)++ = '<';
len++;
break;
case LDIF_PUT_B64: /* base64 value */
*(*out)++ = ':';
len++;
break;
}
switch( type ) {
case LDIF_PUT_TEXT:
case LDIF_PUT_URL:
case LDIF_PUT_B64:
*(*out)++ = ' ';
len++;
/* fall-thru */
case LDIF_PUT_COMMENT:
/* pre-encoded names */
for ( i=0; i < vlen; i++ ) {
if ( len > LDIF_LINE_WIDTH ) {
*(*out)++ = '\n';
*(*out)++ = ' ';
len = 1;
}
*(*out)++ = val[i];
len++;
}
*(*out)++ = '\n';
return;
}
save = *out;
savelen = len;
*(*out)++ = ' ';
len++;
stop = (const unsigned char *) (val + vlen);
if ( type == LDIF_PUT_VALUE
&& isgraph( val[0] ) && val[0] != ':' && val[0] != '<'
&& isgraph( val[vlen-1] )
#ifndef LDAP_BINARY_DEBUG
&& strstr( name, ";binary" ) == NULL
#endif
#ifndef LDAP_PASSWD_DEBUG
&& strcasecmp( name, "userPassword" ) != 0 /* encode userPassword */
&& strcasecmp( name, "2.5.4.35" ) != 0 /* encode userPassword */
#endif
) {
int b64 = 0;
for ( byte = (const unsigned char *) val; byte < stop;
byte++, len++ )
{
if ( !isascii( *byte ) || !isprint( *byte ) ) {
b64 = 1;
break;
}
if ( len > LDIF_LINE_WIDTH+LDIF_KLUDGE ) {
*(*out)++ = '\n';
*(*out)++ = ' ';
len = 1;
}
*(*out)++ = *byte;
}
if( !b64 ) {
*(*out)++ = '\n';
return;
}
}
*out = save;
*(*out)++ = ':';
*(*out)++ = ' ';
len = savelen + 2;
/* convert to base 64 (3 bytes => 4 base 64 digits) */
for ( byte = (const 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 > LDIF_LINE_WIDTH+LDIF_KLUDGE ) {
*(*out)++ = '\n';
*(*out)++ = ' ';
len = 1;
}
/* get b64 digit from high order 6 bits */
*(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 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 > LDIF_LINE_WIDTH+LDIF_KLUDGE ) {
*(*out)++ = '\n';
*(*out)++ = ' ';
len = 1;
}
if( i + pad < 4 ) {
/* get b64 digit from low order 6 bits */
*(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
} else {
*(*out)++ = '=';
}
}
}
*(*out)++ = '\n';
}
/*
* ldif_type_and_value return BER malloc'd, zero-terminated LDIF line
*/
char *
ldif_put(
int type,
LDAP_CONST char *name,
LDAP_CONST char *val,
ber_len_t vlen )
{
char *buf, *p;
ber_len_t nlen;
nlen = ( name != NULL ) ? strlen( name ) : 0;
buf = (char *) ber_memalloc( LDIF_SIZE_NEEDED( nlen, vlen ) + 1 );
if ( buf == NULL ) {
ber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
"ldif_type_and_value: malloc failed!" );
return NULL;
}
p = buf;
ldif_sput( &p, type, name, val, vlen );
*p = '\0';
return( buf );
}
int ldif_is_not_printable(
LDAP_CONST char *val,
ber_len_t vlen )
{
if( vlen == 0 || val == NULL ) {
return -1;
}
if( isgraph( val[0] ) && val[0] != ':' && val[0] != '<' &&
isgraph( val[vlen-1] ) )
{
ber_len_t i;
for ( i = 0; val[i]; i++ ) {
if ( !isascii( val[i] ) || !isprint( val[i] ) ) {
return 1;
}
}
return 0;
}
return 1;
}
/*
* slap_read_ldif - read an ldif record. Return 1 for success, 0 for EOF.
*/
int
ldif_read_record(
FILE *fp,
int *lno, /* ptr to line number counter */
char **bufp, /* ptr to malloced output buffer */
int *buflenp ) /* ptr to length of *bufp */
{
char linebuf[BUFSIZ], *line, *nbufp;
ber_len_t lcur = 0, len, linesize;
int last_ch = '\n', found_entry = 0, stop;
line = linebuf;
linesize = sizeof( linebuf );
for ( stop = feof( fp ); !stop; last_ch = line[len-1] ) {
if ( fgets( line, linesize, fp ) == NULL ) {
stop = 1;
/* Add \n in case the file does not end with newline */
line = "\n";
}
len = strlen( line );
if ( last_ch == '\n' ) {
(*lno)++;
if ( line[0] == '\n' ) {
if ( !found_entry )
continue;
break;
}
if ( !found_entry ) {
/* Found a new entry */
found_entry = 1;
if ( isdigit( (unsigned char) line[0] ) ) {
/* skip index */
continue;
}
}
}
if ( *buflenp - lcur <= len ) {
*buflenp += len + BUFSIZ;
nbufp = ber_memrealloc( *bufp, *buflenp );
if( nbufp == NULL ) {
return 0;
}
*bufp = nbufp;
}
strcpy( *bufp + lcur, line );
lcur += len;
}
return( found_entry );
}
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