1/*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10/* Part of the code in here was originally in conf.c, which is now removed */
11
12#include <stdio.h>
13#include <string.h>
14#include "internal/cryptlib.h"
15#include "internal/o_dir.h"
16#include <openssl/lhash.h>
17#include <openssl/conf.h>
18#include <openssl/conf_api.h>
19#include "conf_def.h"
20#include <openssl/buffer.h>
21#include <openssl/err.h>
22#ifndef OPENSSL_NO_POSIX_IO
23# include <sys/stat.h>
24# ifdef _WIN32
25#  define stat    _stat
26#  define strcasecmp _stricmp
27# endif
28#endif
29
30#ifndef S_ISDIR
31# define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
32#endif
33
34/*
35 * The maximum length we can grow a value to after variable expansion. 64k
36 * should be more than enough for all reasonable uses.
37 */
38#define MAX_CONF_VALUE_LENGTH       65536
39
40static int is_keytype(const CONF *conf, char c, unsigned short type);
41static char *eat_ws(CONF *conf, char *p);
42static void trim_ws(CONF *conf, char *start);
43static char *eat_alpha_numeric(CONF *conf, char *p);
44static void clear_comments(CONF *conf, char *p);
45static int str_copy(CONF *conf, char *section, char **to, char *from);
46static char *scan_quote(CONF *conf, char *p);
47static char *scan_dquote(CONF *conf, char *p);
48#define scan_esc(conf,p)        (((IS_EOF((conf),(p)[1]))?((p)+1):((p)+2)))
49#ifndef OPENSSL_NO_POSIX_IO
50static BIO *process_include(char *include, OPENSSL_DIR_CTX **dirctx,
51                            char **dirpath);
52static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx);
53#endif
54
55static CONF *def_create(CONF_METHOD *meth);
56static int def_init_default(CONF *conf);
57static int def_init_WIN32(CONF *conf);
58static int def_destroy(CONF *conf);
59static int def_destroy_data(CONF *conf);
60static int def_load(CONF *conf, const char *name, long *eline);
61static int def_load_bio(CONF *conf, BIO *bp, long *eline);
62static int def_dump(const CONF *conf, BIO *bp);
63static int def_is_number(const CONF *conf, char c);
64static int def_to_int(const CONF *conf, char c);
65
66static CONF_METHOD default_method = {
67    "OpenSSL default",
68    def_create,
69    def_init_default,
70    def_destroy,
71    def_destroy_data,
72    def_load_bio,
73    def_dump,
74    def_is_number,
75    def_to_int,
76    def_load
77};
78
79static CONF_METHOD WIN32_method = {
80    "WIN32",
81    def_create,
82    def_init_WIN32,
83    def_destroy,
84    def_destroy_data,
85    def_load_bio,
86    def_dump,
87    def_is_number,
88    def_to_int,
89    def_load
90};
91
92CONF_METHOD *NCONF_default(void)
93{
94    return &default_method;
95}
96
97CONF_METHOD *NCONF_WIN32(void)
98{
99    return &WIN32_method;
100}
101
102static CONF *def_create(CONF_METHOD *meth)
103{
104    CONF *ret;
105
106    ret = OPENSSL_malloc(sizeof(*ret));
107    if (ret != NULL)
108        if (meth->init(ret) == 0) {
109            OPENSSL_free(ret);
110            ret = NULL;
111        }
112    return ret;
113}
114
115static int def_init_default(CONF *conf)
116{
117    if (conf == NULL)
118        return 0;
119
120    conf->meth = &default_method;
121    conf->meth_data = (void *)CONF_type_default;
122    conf->data = NULL;
123
124    return 1;
125}
126
127static int def_init_WIN32(CONF *conf)
128{
129    if (conf == NULL)
130        return 0;
131
132    conf->meth = &WIN32_method;
133    conf->meth_data = (void *)CONF_type_win32;
134    conf->data = NULL;
135
136    return 1;
137}
138
139static int def_destroy(CONF *conf)
140{
141    if (def_destroy_data(conf)) {
142        OPENSSL_free(conf);
143        return 1;
144    }
145    return 0;
146}
147
148static int def_destroy_data(CONF *conf)
149{
150    if (conf == NULL)
151        return 0;
152    _CONF_free_data(conf);
153    return 1;
154}
155
156static int def_load(CONF *conf, const char *name, long *line)
157{
158    int ret;
159    BIO *in = NULL;
160
161#ifdef OPENSSL_SYS_VMS
162    in = BIO_new_file(name, "r");
163#else
164    in = BIO_new_file(name, "rb");
165#endif
166    if (in == NULL) {
167        if (ERR_GET_REASON(ERR_peek_last_error()) == BIO_R_NO_SUCH_FILE)
168            CONFerr(CONF_F_DEF_LOAD, CONF_R_NO_SUCH_FILE);
169        else
170            CONFerr(CONF_F_DEF_LOAD, ERR_R_SYS_LIB);
171        return 0;
172    }
173
174    ret = def_load_bio(conf, in, line);
175    BIO_free(in);
176
177    return ret;
178}
179
180static int def_load_bio(CONF *conf, BIO *in, long *line)
181{
182/* The macro BUFSIZE conflicts with a system macro in VxWorks */
183#define CONFBUFSIZE     512
184    int bufnum = 0, i, ii;
185    BUF_MEM *buff = NULL;
186    char *s, *p, *end;
187    int again;
188    int first_call = 1;
189    long eline = 0;
190    char btmp[DECIMAL_SIZE(eline) + 1];
191    CONF_VALUE *v = NULL, *tv;
192    CONF_VALUE *sv = NULL;
193    char *section = NULL, *buf;
194    char *start, *psection, *pname;
195    void *h = (void *)(conf->data);
196    STACK_OF(BIO) *biosk = NULL;
197#ifndef OPENSSL_NO_POSIX_IO
198    char *dirpath = NULL;
199    OPENSSL_DIR_CTX *dirctx = NULL;
200#endif
201
202    if ((buff = BUF_MEM_new()) == NULL) {
203        CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_BUF_LIB);
204        goto err;
205    }
206
207    section = OPENSSL_strdup("default");
208    if (section == NULL) {
209        CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
210        goto err;
211    }
212
213    if (_CONF_new_data(conf) == 0) {
214        CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
215        goto err;
216    }
217
218    sv = _CONF_new_section(conf, section);
219    if (sv == NULL) {
220        CONFerr(CONF_F_DEF_LOAD_BIO, CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
221        goto err;
222    }
223
224    bufnum = 0;
225    again = 0;
226    for (;;) {
227        if (!BUF_MEM_grow(buff, bufnum + CONFBUFSIZE)) {
228            CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_BUF_LIB);
229            goto err;
230        }
231        p = &(buff->data[bufnum]);
232        *p = '\0';
233 read_retry:
234        BIO_gets(in, p, CONFBUFSIZE - 1);
235        p[CONFBUFSIZE - 1] = '\0';
236        ii = i = strlen(p);
237        if (first_call) {
238            /* Other BOMs imply unsupported multibyte encoding,
239             * so don't strip them and let the error raise */
240            const unsigned char utf8_bom[3] = {0xEF, 0xBB, 0xBF};
241
242            if (i >= 3 && memcmp(p, utf8_bom, 3) == 0) {
243                memmove(p, p + 3, i - 3);
244                p[i - 3] = 0;
245                i -= 3;
246                ii -= 3;
247            }
248            first_call = 0;
249        }
250        if (i == 0 && !again) {
251            /* the currently processed BIO is at EOF */
252            BIO *parent;
253
254#ifndef OPENSSL_NO_POSIX_IO
255            /* continue processing with the next file from directory */
256            if (dirctx != NULL) {
257                BIO *next;
258
259                if ((next = get_next_file(dirpath, &dirctx)) != NULL) {
260                    BIO_vfree(in);
261                    in = next;
262                    goto read_retry;
263                } else {
264                    OPENSSL_free(dirpath);
265                    dirpath = NULL;
266                }
267            }
268#endif
269            /* no more files in directory, continue with processing parent */
270            if ((parent = sk_BIO_pop(biosk)) == NULL) {
271                /* everything processed get out of the loop */
272                break;
273            } else {
274                BIO_vfree(in);
275                in = parent;
276                goto read_retry;
277            }
278        }
279        again = 0;
280        while (i > 0) {
281            if ((p[i - 1] != '\r') && (p[i - 1] != '\n'))
282                break;
283            else
284                i--;
285        }
286        /*
287         * we removed some trailing stuff so there is a new line on the end.
288         */
289        if (ii && i == ii)
290            again = 1;          /* long line */
291        else {
292            p[i] = '\0';
293            eline++;            /* another input line */
294        }
295
296        /* we now have a line with trailing \r\n removed */
297
298        /* i is the number of bytes */
299        bufnum += i;
300
301        v = NULL;
302        /* check for line continuation */
303        if (bufnum >= 1) {
304            /*
305             * If we have bytes and the last char '\\' and second last char
306             * is not '\\'
307             */
308            p = &(buff->data[bufnum - 1]);
309            if (IS_ESC(conf, p[0]) && ((bufnum <= 1) || !IS_ESC(conf, p[-1]))) {
310                bufnum--;
311                again = 1;
312            }
313        }
314        if (again)
315            continue;
316        bufnum = 0;
317        buf = buff->data;
318
319        clear_comments(conf, buf);
320        s = eat_ws(conf, buf);
321        if (IS_EOF(conf, *s))
322            continue;           /* blank line */
323        if (*s == '[') {
324            char *ss;
325
326            s++;
327            start = eat_ws(conf, s);
328            ss = start;
329 again:
330            end = eat_alpha_numeric(conf, ss);
331            p = eat_ws(conf, end);
332            if (*p != ']') {
333                if (*p != '\0' && ss != p) {
334                    ss = p;
335                    goto again;
336                }
337                CONFerr(CONF_F_DEF_LOAD_BIO,
338                        CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
339                goto err;
340            }
341            *end = '\0';
342            if (!str_copy(conf, NULL, &section, start))
343                goto err;
344            if ((sv = _CONF_get_section(conf, section)) == NULL)
345                sv = _CONF_new_section(conf, section);
346            if (sv == NULL) {
347                CONFerr(CONF_F_DEF_LOAD_BIO,
348                        CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
349                goto err;
350            }
351            continue;
352        } else {
353            pname = s;
354            end = eat_alpha_numeric(conf, s);
355            if ((end[0] == ':') && (end[1] == ':')) {
356                *end = '\0';
357                end += 2;
358                psection = pname;
359                pname = end;
360                end = eat_alpha_numeric(conf, end);
361            } else {
362                psection = section;
363            }
364            p = eat_ws(conf, end);
365            if (strncmp(pname, ".include", 8) == 0
366                && (p != pname + 8 || *p == '=')) {
367                char *include = NULL;
368                BIO *next;
369
370                if (*p == '=') {
371                    p++;
372                    p = eat_ws(conf, p);
373                }
374                trim_ws(conf, p);
375                if (!str_copy(conf, psection, &include, p))
376                    goto err;
377                /* get the BIO of the included file */
378#ifndef OPENSSL_NO_POSIX_IO
379                next = process_include(include, &dirctx, &dirpath);
380                if (include != dirpath) {
381                    /* dirpath will contain include in case of a directory */
382                    OPENSSL_free(include);
383                }
384#else
385                next = BIO_new_file(include, "r");
386                OPENSSL_free(include);
387#endif
388                if (next != NULL) {
389                    /* push the currently processing BIO onto stack */
390                    if (biosk == NULL) {
391                        if ((biosk = sk_BIO_new_null()) == NULL) {
392                            CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
393                            BIO_free(next);
394                            goto err;
395                        }
396                    }
397                    if (!sk_BIO_push(biosk, in)) {
398                        CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
399                        BIO_free(next);
400                        goto err;
401                    }
402                    /* continue with reading from the included BIO */
403                    in = next;
404                }
405                continue;
406            } else if (*p != '=') {
407                CONFerr(CONF_F_DEF_LOAD_BIO, CONF_R_MISSING_EQUAL_SIGN);
408                goto err;
409            }
410            *end = '\0';
411            p++;
412            start = eat_ws(conf, p);
413            trim_ws(conf, start);
414
415            if ((v = OPENSSL_malloc(sizeof(*v))) == NULL) {
416                CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
417                goto err;
418            }
419            v->name = OPENSSL_strdup(pname);
420            v->value = NULL;
421            if (v->name == NULL) {
422                CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
423                goto err;
424            }
425            if (!str_copy(conf, psection, &(v->value), start))
426                goto err;
427
428            if (strcmp(psection, section) != 0) {
429                if ((tv = _CONF_get_section(conf, psection))
430                    == NULL)
431                    tv = _CONF_new_section(conf, psection);
432                if (tv == NULL) {
433                    CONFerr(CONF_F_DEF_LOAD_BIO,
434                            CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
435                    goto err;
436                }
437            } else
438                tv = sv;
439            if (_CONF_add_string(conf, tv, v) == 0) {
440                CONFerr(CONF_F_DEF_LOAD_BIO, ERR_R_MALLOC_FAILURE);
441                goto err;
442            }
443            v = NULL;
444        }
445    }
446    BUF_MEM_free(buff);
447    OPENSSL_free(section);
448    /*
449     * No need to pop, since we only get here if the stack is empty.
450     * If this causes a BIO leak, THE ISSUE IS SOMEWHERE ELSE!
451     */
452    sk_BIO_free(biosk);
453    return 1;
454 err:
455    BUF_MEM_free(buff);
456    OPENSSL_free(section);
457    /*
458     * Since |in| is the first element of the stack and should NOT be freed
459     * here, we cannot use sk_BIO_pop_free().  Instead, we pop and free one
460     * BIO at a time, making sure that the last one popped isn't.
461     */
462    while (sk_BIO_num(biosk) > 0) {
463        BIO *popped = sk_BIO_pop(biosk);
464        BIO_vfree(in);
465        in = popped;
466    }
467    sk_BIO_free(biosk);
468#ifndef OPENSSL_NO_POSIX_IO
469    OPENSSL_free(dirpath);
470    if (dirctx != NULL)
471        OPENSSL_DIR_end(&dirctx);
472#endif
473    if (line != NULL)
474        *line = eline;
475    BIO_snprintf(btmp, sizeof(btmp), "%ld", eline);
476    ERR_add_error_data(2, "line ", btmp);
477    if (h != conf->data) {
478        CONF_free(conf->data);
479        conf->data = NULL;
480    }
481    if (v != NULL) {
482        OPENSSL_free(v->name);
483        OPENSSL_free(v->value);
484        OPENSSL_free(v);
485    }
486    return 0;
487}
488
489static void clear_comments(CONF *conf, char *p)
490{
491    for (;;) {
492        if (IS_FCOMMENT(conf, *p)) {
493            *p = '\0';
494            return;
495        }
496        if (!IS_WS(conf, *p)) {
497            break;
498        }
499        p++;
500    }
501
502    for (;;) {
503        if (IS_COMMENT(conf, *p)) {
504            *p = '\0';
505            return;
506        }
507        if (IS_DQUOTE(conf, *p)) {
508            p = scan_dquote(conf, p);
509            continue;
510        }
511        if (IS_QUOTE(conf, *p)) {
512            p = scan_quote(conf, p);
513            continue;
514        }
515        if (IS_ESC(conf, *p)) {
516            p = scan_esc(conf, p);
517            continue;
518        }
519        if (IS_EOF(conf, *p))
520            return;
521        else
522            p++;
523    }
524}
525
526static int str_copy(CONF *conf, char *section, char **pto, char *from)
527{
528    int q, r, rr = 0, to = 0, len = 0;
529    char *s, *e, *rp, *p, *rrp, *np, *cp, v;
530    BUF_MEM *buf;
531
532    if ((buf = BUF_MEM_new()) == NULL)
533        return 0;
534
535    len = strlen(from) + 1;
536    if (!BUF_MEM_grow(buf, len))
537        goto err;
538
539    for (;;) {
540        if (IS_QUOTE(conf, *from)) {
541            q = *from;
542            from++;
543            while (!IS_EOF(conf, *from) && (*from != q)) {
544                if (IS_ESC(conf, *from)) {
545                    from++;
546                    if (IS_EOF(conf, *from))
547                        break;
548                }
549                buf->data[to++] = *(from++);
550            }
551            if (*from == q)
552                from++;
553        } else if (IS_DQUOTE(conf, *from)) {
554            q = *from;
555            from++;
556            while (!IS_EOF(conf, *from)) {
557                if (*from == q) {
558                    if (*(from + 1) == q) {
559                        from++;
560                    } else {
561                        break;
562                    }
563                }
564                buf->data[to++] = *(from++);
565            }
566            if (*from == q)
567                from++;
568        } else if (IS_ESC(conf, *from)) {
569            from++;
570            v = *(from++);
571            if (IS_EOF(conf, v))
572                break;
573            else if (v == 'r')
574                v = '\r';
575            else if (v == 'n')
576                v = '\n';
577            else if (v == 'b')
578                v = '\b';
579            else if (v == 't')
580                v = '\t';
581            buf->data[to++] = v;
582        } else if (IS_EOF(conf, *from))
583            break;
584        else if (*from == '$') {
585            size_t newsize;
586
587            /* try to expand it */
588            rrp = NULL;
589            s = &(from[1]);
590            if (*s == '{')
591                q = '}';
592            else if (*s == '(')
593                q = ')';
594            else
595                q = 0;
596
597            if (q)
598                s++;
599            cp = section;
600            e = np = s;
601            while (IS_ALNUM(conf, *e))
602                e++;
603            if ((e[0] == ':') && (e[1] == ':')) {
604                cp = np;
605                rrp = e;
606                rr = *e;
607                *rrp = '\0';
608                e += 2;
609                np = e;
610                while (IS_ALNUM(conf, *e))
611                    e++;
612            }
613            r = *e;
614            *e = '\0';
615            rp = e;
616            if (q) {
617                if (r != q) {
618                    CONFerr(CONF_F_STR_COPY, CONF_R_NO_CLOSE_BRACE);
619                    goto err;
620                }
621                e++;
622            }
623            /*-
624             * So at this point we have
625             * np which is the start of the name string which is
626             *   '\0' terminated.
627             * cp which is the start of the section string which is
628             *   '\0' terminated.
629             * e is the 'next point after'.
630             * r and rr are the chars replaced by the '\0'
631             * rp and rrp is where 'r' and 'rr' came from.
632             */
633            p = _CONF_get_string(conf, cp, np);
634            if (rrp != NULL)
635                *rrp = rr;
636            *rp = r;
637            if (p == NULL) {
638                CONFerr(CONF_F_STR_COPY, CONF_R_VARIABLE_HAS_NO_VALUE);
639                goto err;
640            }
641            newsize = strlen(p) + buf->length - (e - from);
642            if (newsize > MAX_CONF_VALUE_LENGTH) {
643                CONFerr(CONF_F_STR_COPY, CONF_R_VARIABLE_EXPANSION_TOO_LONG);
644                goto err;
645            }
646            if (!BUF_MEM_grow_clean(buf, newsize)) {
647                CONFerr(CONF_F_STR_COPY, ERR_R_MALLOC_FAILURE);
648                goto err;
649            }
650            while (*p)
651                buf->data[to++] = *(p++);
652
653            /*
654             * Since we change the pointer 'from', we also have to change the
655             * perceived length of the string it points at.  /RL
656             */
657            len -= e - from;
658            from = e;
659
660            /*
661             * In case there were no braces or parenthesis around the
662             * variable reference, we have to put back the character that was
663             * replaced with a '\0'.  /RL
664             */
665            *rp = r;
666        } else
667            buf->data[to++] = *(from++);
668    }
669    buf->data[to] = '\0';
670    OPENSSL_free(*pto);
671    *pto = buf->data;
672    OPENSSL_free(buf);
673    return 1;
674 err:
675    BUF_MEM_free(buf);
676    return 0;
677}
678
679#ifndef OPENSSL_NO_POSIX_IO
680/*
681 * Check whether included path is a directory.
682 * Returns next BIO to process and in case of a directory
683 * also an opened directory context and the include path.
684 */
685static BIO *process_include(char *include, OPENSSL_DIR_CTX **dirctx,
686                            char **dirpath)
687{
688    struct stat st = { 0 };
689    BIO *next;
690
691    if (stat(include, &st) < 0) {
692        SYSerr(SYS_F_STAT, errno);
693        ERR_add_error_data(1, include);
694        /* missing include file is not fatal error */
695        return NULL;
696    }
697
698    if (S_ISDIR(st.st_mode)) {
699        if (*dirctx != NULL) {
700            CONFerr(CONF_F_PROCESS_INCLUDE,
701                    CONF_R_RECURSIVE_DIRECTORY_INCLUDE);
702            ERR_add_error_data(1, include);
703            return NULL;
704        }
705        /* a directory, load its contents */
706        if ((next = get_next_file(include, dirctx)) != NULL)
707            *dirpath = include;
708        return next;
709    }
710
711    next = BIO_new_file(include, "r");
712    return next;
713}
714
715/*
716 * Get next file from the directory path.
717 * Returns BIO of the next file to read and updates dirctx.
718 */
719static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx)
720{
721    const char *filename;
722    size_t pathlen;
723
724    pathlen = strlen(path);
725    while ((filename = OPENSSL_DIR_read(dirctx, path)) != NULL) {
726        size_t namelen;
727
728        namelen = strlen(filename);
729
730
731        if ((namelen > 5 && strcasecmp(filename + namelen - 5, ".conf") == 0)
732            || (namelen > 4 && strcasecmp(filename + namelen - 4, ".cnf") == 0)) {
733            size_t newlen;
734            char *newpath;
735            BIO *bio;
736
737            newlen = pathlen + namelen + 2;
738            newpath = OPENSSL_zalloc(newlen);
739            if (newpath == NULL) {
740                CONFerr(CONF_F_GET_NEXT_FILE, ERR_R_MALLOC_FAILURE);
741                break;
742            }
743#ifdef OPENSSL_SYS_VMS
744            /*
745             * If the given path isn't clear VMS syntax,
746             * we treat it as on Unix.
747             */
748            if (path[pathlen - 1] == ']'
749                || path[pathlen - 1] == '>'
750                || path[pathlen - 1] == ':') {
751                /* Clear VMS directory syntax, just copy as is */
752                OPENSSL_strlcpy(newpath, path, newlen);
753            }
754#endif
755            if (newpath[0] == '\0') {
756                OPENSSL_strlcpy(newpath, path, newlen);
757                OPENSSL_strlcat(newpath, "/", newlen);
758            }
759            OPENSSL_strlcat(newpath, filename, newlen);
760
761            bio = BIO_new_file(newpath, "r");
762            OPENSSL_free(newpath);
763            /* Errors when opening files are non-fatal. */
764            if (bio != NULL)
765                return bio;
766        }
767    }
768    OPENSSL_DIR_end(dirctx);
769    *dirctx = NULL;
770    return NULL;
771}
772#endif
773
774static int is_keytype(const CONF *conf, char c, unsigned short type)
775{
776    const unsigned short * keytypes = (const unsigned short *) conf->meth_data;
777    unsigned char key = (unsigned char)c;
778
779#ifdef CHARSET_EBCDIC
780# if CHAR_BIT > 8
781    if (key > 255) {
782        /* key is out of range for os_toascii table */
783        return 0;
784    }
785# endif
786    /* convert key from ebcdic to ascii */
787    key = os_toascii[key];
788#endif
789
790    if (key > 127) {
791        /* key is not a seven bit ascii character */
792        return 0;
793    }
794
795    return (keytypes[key] & type) ? 1 : 0;
796}
797
798static char *eat_ws(CONF *conf, char *p)
799{
800    while (IS_WS(conf, *p) && (!IS_EOF(conf, *p)))
801        p++;
802    return p;
803}
804
805static void trim_ws(CONF *conf, char *start)
806{
807    char *p = start;
808
809    while (!IS_EOF(conf, *p))
810        p++;
811    p--;
812    while ((p >= start) && IS_WS(conf, *p))
813        p--;
814    p++;
815    *p = '\0';
816}
817
818static char *eat_alpha_numeric(CONF *conf, char *p)
819{
820    for (;;) {
821        if (IS_ESC(conf, *p)) {
822            p = scan_esc(conf, p);
823            continue;
824        }
825        if (!IS_ALNUM_PUNCT(conf, *p))
826            return p;
827        p++;
828    }
829}
830
831static char *scan_quote(CONF *conf, char *p)
832{
833    int q = *p;
834
835    p++;
836    while (!(IS_EOF(conf, *p)) && (*p != q)) {
837        if (IS_ESC(conf, *p)) {
838            p++;
839            if (IS_EOF(conf, *p))
840                return p;
841        }
842        p++;
843    }
844    if (*p == q)
845        p++;
846    return p;
847}
848
849static char *scan_dquote(CONF *conf, char *p)
850{
851    int q = *p;
852
853    p++;
854    while (!(IS_EOF(conf, *p))) {
855        if (*p == q) {
856            if (*(p + 1) == q) {
857                p++;
858            } else {
859                break;
860            }
861        }
862        p++;
863    }
864    if (*p == q)
865        p++;
866    return p;
867}
868
869static void dump_value_doall_arg(const CONF_VALUE *a, BIO *out)
870{
871    if (a->name)
872        BIO_printf(out, "[%s] %s=%s\n", a->section, a->name, a->value);
873    else
874        BIO_printf(out, "[[%s]]\n", a->section);
875}
876
877IMPLEMENT_LHASH_DOALL_ARG_CONST(CONF_VALUE, BIO);
878
879static int def_dump(const CONF *conf, BIO *out)
880{
881    lh_CONF_VALUE_doall_BIO(conf->data, dump_value_doall_arg, out);
882    return 1;
883}
884
885static int def_is_number(const CONF *conf, char c)
886{
887    return IS_NUMBER(conf, c);
888}
889
890static int def_to_int(const CONF *conf, char c)
891{
892    return c - '0';
893}
894