1 /* line64.c - routines for dealing with the slapd line format */
18 #define CONTINUED_LINE_MARKER '\001'
20 static char nib2b64[0x40f] =
21 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
23 static unsigned char b642nib[0x80] = {
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, 0xff, 0xff, 0xff, 0xff, 0xff,
29 0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
30 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
31 0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
32 0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
33 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
34 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
35 0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
36 0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
37 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
38 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
39 0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff
43 * str_parse_line - takes a line of the form "type:[:] value" and splits it
44 * into components "type" and "value". if a double colon separates type from
45 * value, then value is encoded in base 64, and parse_line un-decodes it
46 * (in place) before returning.
57 char *p, *s, *d, *byte, *stop;
61 /* skip any leading space */
62 while ( isspace( *line ) ) {
67 for ( s = line; *s && *s != ':'; s++ )
70 Debug( LDAP_DEBUG_PARSE, "parse_line missing ':'\n", 0, 0, 0 );
74 /* trim any space between type and : */
75 for ( p = s - 1; p > line && isspace( *p ); p-- ) {
80 /* check for double : - indicates base 64 encoded value */
85 /* single : - normally encoded value */
90 /* skip space between : and value */
91 while ( isspace( *s ) ) {
95 /* if no value is present, error out */
97 Debug( LDAP_DEBUG_PARSE, "parse_line missing value\n", 0,0,0 );
101 /* check for continued line markers that should be deleted */
102 for ( p = s, d = s; *p; p++ ) {
103 if ( *p != CONTINUED_LINE_MARKER )
110 stop = strchr( s, '\0' );
112 for ( p = s, *vlen = 0; p < stop; p += 4, *vlen += 3 ) {
113 for ( i = 0; i < 3; i++ ) {
114 if ( p[i] != '=' && (p[i] & 0x80 ||
115 b642nib[ p[i] & 0x7f ] > 0x3f) ) {
116 Debug( LDAP_DEBUG_ANY,
117 "invalid base 64 encoding char (%c) 0x%x\n",
124 nib = b642nib[ p[0] & 0x7f ];
127 nib = b642nib[ p[1] & 0x7f ];
129 byte[1] = (nib & RIGHT4) << 4;
135 nib = b642nib[ p[2] & 0x7f ];
137 byte[2] = (nib & RIGHT2) << 6;
143 nib = b642nib[ p[3] & 0x7f ];
150 *vlen = (int) (d - s);
157 * str_getline - return the next "line" (minus newline) of input from a
158 * string buffer of lines separated by newlines, terminated by \n\n
159 * or \0. this routine handles continued lines, bundling them into
160 * a single big line before returning. if a line begins with a white
161 * space character, it is a continuation of the previous line. the white
162 * space character (nb: only one char), and preceeding newline are changed
163 * into CONTINUED_LINE_MARKER chars, to be deleted later by the
164 * str_parse_line() routine above.
166 * it takes a pointer to a pointer to the buffer on the first call,
167 * which it updates and must be supplied on subsequent calls.
171 str_getline( char **next )
176 if ( *next == NULL || **next == '\n' || **next == '\0' ) {
181 while ( (*next = strchr( *next, '\n' )) != NULL ) {
183 if ( isspace( c ) && c != '\n' ) {
184 **next = CONTINUED_LINE_MARKER;
185 *(*next+1) = CONTINUED_LINE_MARKER;
197 put_type_and_value( char **out, char *t, char *val, int vlen )
199 unsigned char *byte, *p, *stop;
200 unsigned char buf[3];
203 int i, b64, pad, len, savelen;
206 /* put the type + ": " */
207 for ( p = (unsigned char *) t; *p; p++, len++ ) {
217 stop = (unsigned char *) (val + vlen);
218 if ( isascii( val[0] ) && isspace( val[0] ) || val[0] == ':' ) {
221 for ( byte = (unsigned char *) val; byte < stop;
223 if ( !isascii( *byte ) || !isprint( *byte ) ) {
227 if ( len > LINE_WIDTH ) {
240 /* convert to base 64 (3 bytes => 4 base 64 digits) */
241 for ( byte = (unsigned char *) val; byte < stop - 2;
243 bits = (byte[0] & 0xff) << 16;
244 bits |= (byte[1] & 0xff) << 8;
245 bits |= (byte[2] & 0xff);
247 for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
248 if ( len > LINE_WIDTH ) {
254 /* get b64 digit from high order 6 bits */
255 *(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
259 /* add padding if necessary */
261 for ( i = 0; byte + i < stop; i++ ) {
264 for ( pad = 0; i < 3; i++, pad++ ) {
268 bits = (byte[0] & 0xff) << 16;
269 bits |= (byte[1] & 0xff) << 8;
270 bits |= (byte[2] & 0xff);
272 for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
273 if ( len > LINE_WIDTH ) {
280 /* get b64 digit from low order 6 bits */
281 *(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
293 ldif_type_and_value( char *type, char *val, int vlen )
295 * return malloc'd, zero-terminated LDIF line
301 tlen = strlen( type );
302 if (( buf = (char *)malloc( LDIF_SIZE_NEEDED( tlen, vlen ) + 1 )) !=
307 put_type_and_value( &p, type, val, vlen );