1 /* line64.c - routines for dealing with the slapd line format */
10 #include <ac/socket.h>
21 #define CONTINUED_LINE_MARKER '\001'
23 static char nib2b64[0x40f] =
24 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
26 static unsigned char b642nib[0x80] = {
27 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
28 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
29 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
30 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
31 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
32 0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
33 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
34 0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
35 0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
36 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
37 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
38 0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
39 0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
40 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
41 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
42 0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff
46 * ldif_parse_line - takes a line of the form "type:[:] value" and splits it
47 * into components "type" and "value". if a double colon separates type from
48 * value, then value is encoded in base 64, and parse_line un-decodes it
49 * (in place) before returning.
60 char *p, *s, *d, *byte, *stop;
64 /* skip any leading space */
65 while ( isspace( (unsigned char) *line ) ) {
70 for ( s = line; *s && *s != ':'; s++ )
73 lber_pvt_log_printf( LDAP_DEBUG_PARSE, ldif_debug,
74 "ldif_parse_line missing ':'\n");
78 /* trim any space between type and : */
79 for ( p = s - 1; p > line && isspace( (unsigned char) *p ); p-- ) {
84 /* check for double : - indicates base 64 encoded value */
89 /* single : - normally encoded value */
94 /* skip space between : and value */
95 while ( isspace( (unsigned char) *s ) ) {
99 /* if no value is present, error out */
101 lber_pvt_log_printf( LDAP_DEBUG_PARSE, ldif_debug,
102 "ldif_parse_line missing value\n");
106 /* check for continued line markers that should be deleted */
107 for ( p = s, d = s; *p; p++ ) {
108 if ( *p != CONTINUED_LINE_MARKER )
115 stop = strchr( s, '\0' );
117 for ( p = s, *vlen = 0; p < stop; p += 4, *vlen += 3 ) {
118 for ( i = 0; i < 4; i++ ) {
119 if ( p[i] != '=' && (p[i] & 0x80 ||
120 b642nib[ p[i] & 0x7f ] > 0x3f) ) {
121 lber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
122 "ldif_parse_line: invalid base 64 encoding char (%c) 0x%x\n",
129 nib = b642nib[ p[0] & 0x7f ];
132 nib = b642nib[ p[1] & 0x7f ];
134 byte[1] = (nib & RIGHT4) << 4;
140 nib = b642nib[ p[2] & 0x7f ];
142 byte[2] = (nib & RIGHT2) << 6;
148 nib = b642nib[ p[3] & 0x7f ];
155 *vlen = (int) (d - s);
162 * ldif_getline - return the next "line" (minus newline) of input from a
163 * string buffer of lines separated by newlines, terminated by \n\n
164 * or \0. this routine handles continued lines, bundling them into
165 * a single big line before returning. if a line begins with a white
166 * space character, it is a continuation of the previous line. the white
167 * space character (nb: only one char), and preceeding newline are changed
168 * into CONTINUED_LINE_MARKER chars, to be deleted later by the
169 * str_parse_line() routine above.
171 * it takes a pointer to a pointer to the buffer on the first call,
172 * which it updates and must be supplied on subsequent calls.
176 ldif_getline( char **next )
180 if ( *next == NULL || **next == '\n' || **next == '\0' ) {
185 while ( (*next = strchr( *next, '\n' )) != NULL ) {
186 unsigned char c = *(*next + 1);
187 if ( isspace( c ) && c != '\n' ) {
188 **next = CONTINUED_LINE_MARKER;
189 *(*next+1) = CONTINUED_LINE_MARKER;
201 ldif_put_type_and_value( char **out, char *t, char *val, int vlen )
203 unsigned char *byte, *p, *stop;
204 unsigned char buf[3];
207 int i, b64, pad, len, savelen;
210 /* put the type + ": " */
211 for ( p = (unsigned char *) t; *p; p++, len++ ) {
221 stop = (unsigned char *) (val + vlen);
222 if ( isascii( val[0] ) && (isspace( val[0] ) || val[0] == ':') ) {
225 for ( byte = (unsigned char *) val; byte < stop;
227 if ( !isascii( *byte ) || !isprint( *byte ) ) {
231 if ( len > LDIF_LINE_WIDTH ) {
244 /* convert to base 64 (3 bytes => 4 base 64 digits) */
245 for ( byte = (unsigned char *) val; byte < stop - 2;
247 bits = (byte[0] & 0xff) << 16;
248 bits |= (byte[1] & 0xff) << 8;
249 bits |= (byte[2] & 0xff);
251 for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
252 if ( len > LDIF_LINE_WIDTH ) {
258 /* get b64 digit from high order 6 bits */
259 *(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
263 /* add padding if necessary */
265 for ( i = 0; byte + i < stop; i++ ) {
268 for ( pad = 0; i < 3; i++, pad++ ) {
272 bits = (byte[0] & 0xff) << 16;
273 bits |= (byte[1] & 0xff) << 8;
274 bits |= (byte[2] & 0xff);
276 for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
277 if ( len > LDIF_LINE_WIDTH ) {
284 /* get b64 digit from low order 6 bits */
285 *(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
297 ldif_type_and_value( char *type, char *val, int vlen )
299 * return malloc'd, zero-terminated LDIF line
305 tlen = strlen( type );
306 if (( buf = (char *) malloc( LDIF_SIZE_NEEDED( tlen, vlen ) + 1 ))
309 lber_pvt_log_printf( LDAP_DEBUG_ANY, ldif_debug,
310 "ldif_type_and_value: malloc failed!" );
315 ldif_put_type_and_value( &p, type, val, vlen );