1 /* line64.c - routines for dealing with the slapd line format */
17 #define CONTINUED_LINE_MARKER '\001'
19 static char nib2b64[0x40f] =
20 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
22 static unsigned char b642nib[0x80] = {
23 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
24 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
25 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
26 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
27 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
28 0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
29 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
30 0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
31 0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
32 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
33 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
34 0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
35 0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
36 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
37 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
38 0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff
42 * str_parse_line - takes a line of the form "type:[:] value" and splits it
43 * into components "type" and "value". if a double colon separates type from
44 * value, then value is encoded in base 64, and parse_line un-decodes it
45 * (in place) before returning.
56 char *p, *s, *d, *byte, *stop;
60 /* skip any leading space */
61 while ( isspace( *line ) ) {
66 for ( s = line; *s && *s != ':'; s++ )
69 Debug( LDAP_DEBUG_PARSE, "parse_line missing ':'\n", 0, 0, 0 );
73 /* trim any space between type and : */
74 for ( p = s - 1; p > line && isspace( *p ); p-- ) {
79 /* check for double : - indicates base 64 encoded value */
84 /* single : - normally encoded value */
89 /* skip space between : and value */
90 while ( isspace( *s ) ) {
94 /* if no value is present, error out */
96 Debug( LDAP_DEBUG_PARSE, "parse_line missing value\n", 0,0,0 );
100 /* check for continued line markers that should be deleted */
101 for ( p = s, d = s; *p; p++ ) {
102 if ( *p != CONTINUED_LINE_MARKER )
109 stop = strchr( s, '\0' );
111 for ( p = s, *vlen = 0; p < stop; p += 4, *vlen += 3 ) {
112 for ( i = 0; i < 3; i++ ) {
113 if ( p[i] != '=' && (p[i] & 0x80 ||
114 b642nib[ p[i] & 0x7f ] > 0x3f) ) {
115 Debug( LDAP_DEBUG_ANY,
116 "invalid base 64 encoding char (%c) 0x%x\n",
123 nib = b642nib[ p[0] & 0x7f ];
126 nib = b642nib[ p[1] & 0x7f ];
128 byte[1] = (nib & RIGHT4) << 4;
134 nib = b642nib[ p[2] & 0x7f ];
136 byte[2] = (nib & RIGHT2) << 6;
142 nib = b642nib[ p[3] & 0x7f ];
149 *vlen = (int) (d - s);
156 * str_getline - return the next "line" (minus newline) of input from a
157 * string buffer of lines separated by newlines, terminated by \n\n
158 * or \0. this routine handles continued lines, bundling them into
159 * a single big line before returning. if a line begins with a white
160 * space character, it is a continuation of the previous line. the white
161 * space character (nb: only one char), and preceeding newline are changed
162 * into CONTINUED_LINE_MARKER chars, to be deleted later by the
163 * str_parse_line() routine above.
165 * it takes a pointer to a pointer to the buffer on the first call,
166 * which it updates and must be supplied on subsequent calls.
170 str_getline( char **next )
175 if ( *next == NULL || **next == '\n' || **next == '\0' ) {
180 while ( (*next = strchr( *next, '\n' )) != NULL ) {
182 if ( isspace( c ) && c != '\n' ) {
183 **next = CONTINUED_LINE_MARKER;
184 *(*next+1) = CONTINUED_LINE_MARKER;
196 put_type_and_value( char **out, char *t, char *val, int vlen )
198 unsigned char *byte, *p, *stop;
199 unsigned char buf[3];
202 int i, b64, pad, len, savelen;
205 /* put the type + ": " */
206 for ( p = (unsigned char *) t; *p; p++, len++ ) {
216 stop = (unsigned char *) (val + vlen);
217 if ( isascii( val[0] ) && isspace( val[0] ) || val[0] == ':' ) {
220 for ( byte = (unsigned char *) val; byte < stop;
222 if ( !isascii( *byte ) || !isprint( *byte ) ) {
226 if ( len > LINE_WIDTH ) {
239 /* convert to base 64 (3 bytes => 4 base 64 digits) */
240 for ( byte = (unsigned char *) val; byte < stop - 2;
242 bits = (byte[0] & 0xff) << 16;
243 bits |= (byte[1] & 0xff) << 8;
244 bits |= (byte[2] & 0xff);
246 for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
247 if ( len > LINE_WIDTH ) {
253 /* get b64 digit from high order 6 bits */
254 *(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
258 /* add padding if necessary */
260 for ( i = 0; byte + i < stop; i++ ) {
263 for ( pad = 0; i < 3; i++, pad++ ) {
267 bits = (byte[0] & 0xff) << 16;
268 bits |= (byte[1] & 0xff) << 8;
269 bits |= (byte[2] & 0xff);
271 for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
272 if ( len > LINE_WIDTH ) {
278 /* get b64 digit from low order 6 bits */
279 *(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
282 for ( ; pad > 0; pad-- ) {
292 ldif_type_and_value( char *type, char *val, int vlen )
294 * return malloc'd, zero-terminated LDIF line
300 tlen = strlen( type );
301 if (( buf = (char *)malloc( LDIF_SIZE_NEEDED( tlen, vlen ) + 1 )) !=
306 put_type_and_value( &p, type, val, vlen );