1 /* line64.c - routines for dealing with the slapd line format */
10 #include <ac/socket.h>
19 #define CONTINUED_LINE_MARKER '\001'
21 static char nib2b64[0x40f] =
22 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
24 static unsigned char b642nib[0x80] = {
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, 0xff, 0xff, 0xff, 0xff, 0xff,
30 0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
31 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
32 0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
33 0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
34 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
35 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
36 0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
37 0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
38 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
39 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
40 0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff
44 * str_parse_line - takes a line of the form "type:[:] value" and splits it
45 * into components "type" and "value". if a double colon separates type from
46 * value, then value is encoded in base 64, and parse_line un-decodes it
47 * (in place) before returning.
58 char *p, *s, *d, *byte, *stop;
62 /* skip any leading space */
63 while ( isspace( *line ) ) {
68 for ( s = line; *s && *s != ':'; s++ )
71 Debug( LDAP_DEBUG_PARSE, "parse_line missing ':'\n", 0, 0, 0 );
75 /* trim any space between type and : */
76 for ( p = s - 1; p > line && isspace( *p ); p-- ) {
81 /* check for double : - indicates base 64 encoded value */
86 /* single : - normally encoded value */
91 /* skip space between : and value */
92 while ( isspace( *s ) ) {
96 /* if no value is present, error out */
98 Debug( LDAP_DEBUG_PARSE, "parse_line missing value\n", 0,0,0 );
102 /* check for continued line markers that should be deleted */
103 for ( p = s, d = s; *p; p++ ) {
104 if ( *p != CONTINUED_LINE_MARKER )
111 stop = strchr( s, '\0' );
113 for ( p = s, *vlen = 0; p < stop; p += 4, *vlen += 3 ) {
114 for ( i = 0; i < 4; i++ ) {
115 if ( p[i] != '=' && (p[i] & 0x80 ||
116 b642nib[ p[i] & 0x7f ] > 0x3f) ) {
117 Debug( LDAP_DEBUG_ANY,
118 "invalid base 64 encoding char (%c) 0x%x\n",
125 nib = b642nib[ p[0] & 0x7f ];
128 nib = b642nib[ p[1] & 0x7f ];
130 byte[1] = (nib & RIGHT4) << 4;
136 nib = b642nib[ p[2] & 0x7f ];
138 byte[2] = (nib & RIGHT2) << 6;
144 nib = b642nib[ p[3] & 0x7f ];
151 *vlen = (int) (d - s);
158 * str_getline - return the next "line" (minus newline) of input from a
159 * string buffer of lines separated by newlines, terminated by \n\n
160 * or \0. this routine handles continued lines, bundling them into
161 * a single big line before returning. if a line begins with a white
162 * space character, it is a continuation of the previous line. the white
163 * space character (nb: only one char), and preceeding newline are changed
164 * into CONTINUED_LINE_MARKER chars, to be deleted later by the
165 * str_parse_line() routine above.
167 * it takes a pointer to a pointer to the buffer on the first call,
168 * which it updates and must be supplied on subsequent calls.
172 str_getline( char **next )
177 if ( *next == NULL || **next == '\n' || **next == '\0' ) {
182 while ( (*next = strchr( *next, '\n' )) != NULL ) {
184 if ( isspace( c ) && c != '\n' ) {
185 **next = CONTINUED_LINE_MARKER;
186 *(*next+1) = CONTINUED_LINE_MARKER;
198 put_type_and_value( char **out, char *t, char *val, int vlen )
200 unsigned char *byte, *p, *stop;
201 unsigned char buf[3];
204 int i, b64, pad, len, savelen;
207 /* put the type + ": " */
208 for ( p = (unsigned char *) t; *p; p++, len++ ) {
218 stop = (unsigned char *) (val + vlen);
219 if ( isascii( val[0] ) && (isspace( val[0] ) || val[0] == ':') ) {
222 for ( byte = (unsigned char *) val; byte < stop;
224 if ( !isascii( *byte ) || !isprint( *byte ) ) {
228 if ( len > LINE_WIDTH ) {
241 /* convert to base 64 (3 bytes => 4 base 64 digits) */
242 for ( byte = (unsigned char *) val; byte < stop - 2;
244 bits = (byte[0] & 0xff) << 16;
245 bits |= (byte[1] & 0xff) << 8;
246 bits |= (byte[2] & 0xff);
248 for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
249 if ( len > LINE_WIDTH ) {
255 /* get b64 digit from high order 6 bits */
256 *(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
260 /* add padding if necessary */
262 for ( i = 0; byte + i < stop; i++ ) {
265 for ( pad = 0; i < 3; i++, pad++ ) {
269 bits = (byte[0] & 0xff) << 16;
270 bits |= (byte[1] & 0xff) << 8;
271 bits |= (byte[2] & 0xff);
273 for ( i = 0; i < 4; i++, len++, bits <<= 6 ) {
274 if ( len > LINE_WIDTH ) {
281 /* get b64 digit from low order 6 bits */
282 *(*out)++ = nib2b64[ (bits & 0xfc0000L) >> 18 ];
294 ldif_type_and_value( char *type, char *val, int vlen )
296 * return malloc'd, zero-terminated LDIF line
302 tlen = strlen( type );
303 if (( buf = (char *)malloc( LDIF_SIZE_NEEDED( tlen, vlen ) + 1 )) !=
308 put_type_and_value( &p, type, val, vlen );