diff options
Diffstat (limited to 'third_party/git/urlmatch.c')
| -rw-r--r-- | third_party/git/urlmatch.c | 607 |
1 files changed, 0 insertions, 607 deletions
diff --git a/third_party/git/urlmatch.c b/third_party/git/urlmatch.c deleted file mode 100644 index 3e42bd7504..0000000000 --- a/third_party/git/urlmatch.c +++ /dev/null @@ -1,607 +0,0 @@ -#include "cache.h" -#include "urlmatch.h" - -#define URL_ALPHA "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" -#define URL_DIGIT "0123456789" -#define URL_ALPHADIGIT URL_ALPHA URL_DIGIT -#define URL_SCHEME_CHARS URL_ALPHADIGIT "+.-" -#define URL_HOST_CHARS URL_ALPHADIGIT ".-[:]" /* IPv6 literals need [:] */ -#define URL_UNSAFE_CHARS " <>\"%{}|\\^`" /* plus 0x00-0x1F,0x7F-0xFF */ -#define URL_GEN_RESERVED ":/?#[]@" -#define URL_SUB_RESERVED "!$&'()*+,;=" -#define URL_RESERVED URL_GEN_RESERVED URL_SUB_RESERVED /* only allowed delims */ - -static int append_normalized_escapes(struct strbuf *buf, - const char *from, - size_t from_len, - const char *esc_extra, - const char *esc_ok) -{ - /* - * Append to strbuf 'buf' characters from string 'from' with length - * 'from_len' while unescaping characters that do not need to be escaped - * and escaping characters that do. The set of characters to escape - * (the complement of which is unescaped) starts out as the RFC 3986 - * unsafe characters (0x00-0x1F,0x7F-0xFF," <>\"#%{}|\\^`"). If - * 'esc_extra' is not NULL, those additional characters will also always - * be escaped. If 'esc_ok' is not NULL, those characters will be left - * escaped if found that way, but will not be unescaped otherwise (used - * for delimiters). If a %-escape sequence is encountered that is not - * followed by 2 hexadecimal digits, the sequence is invalid and - * false (0) will be returned. Otherwise true (1) will be returned for - * success. - * - * Note that all %-escape sequences will be normalized to UPPERCASE - * as indicated in RFC 3986. Unless included in esc_extra or esc_ok - * alphanumerics and "-._~" will always be unescaped as per RFC 3986. - */ - - while (from_len) { - int ch = *from++; - int was_esc = 0; - - from_len--; - if (ch == '%') { - if (from_len < 2) - return 0; - ch = hex2chr(from); - if (ch < 0) - return 0; - from += 2; - from_len -= 2; - was_esc = 1; - } - if ((unsigned char)ch <= 0x1F || (unsigned char)ch >= 0x7F || - strchr(URL_UNSAFE_CHARS, ch) || - (esc_extra && strchr(esc_extra, ch)) || - (was_esc && strchr(esc_ok, ch))) - strbuf_addf(buf, "%%%02X", (unsigned char)ch); - else - strbuf_addch(buf, ch); - } - - return 1; -} - -static const char *end_of_token(const char *s, int c, size_t n) -{ - const char *next = memchr(s, c, n); - if (!next) - next = s + n; - return next; -} - -static int match_host(const struct url_info *url_info, - const struct url_info *pattern_info) -{ - const char *url = url_info->url + url_info->host_off; - const char *pat = pattern_info->url + pattern_info->host_off; - int url_len = url_info->host_len; - int pat_len = pattern_info->host_len; - - while (url_len && pat_len) { - const char *url_next = end_of_token(url, '.', url_len); - const char *pat_next = end_of_token(pat, '.', pat_len); - - if (pat_next == pat + 1 && pat[0] == '*') - /* wildcard matches anything */ - ; - else if ((pat_next - pat) == (url_next - url) && - !memcmp(url, pat, url_next - url)) - /* the components are the same */ - ; - else - return 0; /* found an unmatch */ - - if (url_next < url + url_len) - url_next++; - url_len -= url_next - url; - url = url_next; - if (pat_next < pat + pat_len) - pat_next++; - pat_len -= pat_next - pat; - pat = pat_next; - } - - return (!url_len && !pat_len); -} - -static char *url_normalize_1(const char *url, struct url_info *out_info, char allow_globs) -{ - /* - * Normalize NUL-terminated url using the following rules: - * - * 1. Case-insensitive parts of url will be converted to lower case - * 2. %-encoded characters that do not need to be will be unencoded - * 3. Characters that are not %-encoded and must be will be encoded - * 4. All %-encodings will be converted to upper case hexadecimal - * 5. Leading 0s are removed from port numbers - * 6. If the default port for the scheme is given it will be removed - * 7. A path part (including empty) not starting with '/' has one added - * 8. Any dot segments (. or ..) in the path are resolved and removed - * 9. IPv6 host literals are allowed (but not normalized or validated) - * - * The rules are based on information in RFC 3986. - * - * Please note this function requires a full URL including a scheme - * and host part (except for file: URLs which may have an empty host). - * - * The return value is a newly allocated string that must be freed - * or NULL if the url is not valid. - * - * If out_info is non-NULL, the url and err fields therein will always - * be set. If a non-NULL value is returned, it will be stored in - * out_info->url as well, out_info->err will be set to NULL and the - * other fields of *out_info will also be filled in. If a NULL value - * is returned, NULL will be stored in out_info->url and out_info->err - * will be set to a brief, translated, error message, but no other - * fields will be filled in. - * - * This is NOT a URL validation function. Full URL validation is NOT - * performed. Some invalid host names are passed through this function - * undetected. However, most all other problems that make a URL invalid - * will be detected (including a missing host for non file: URLs). - */ - - size_t url_len = strlen(url); - struct strbuf norm; - size_t spanned; - size_t scheme_len, user_off=0, user_len=0, passwd_off=0, passwd_len=0; - size_t host_off=0, host_len=0, port_off=0, port_len=0, path_off, path_len, result_len; - const char *slash_ptr, *at_ptr, *colon_ptr, *path_start; - char *result; - - /* - * Copy lowercased scheme and :// suffix, %-escapes are not allowed - * First character of scheme must be URL_ALPHA - */ - spanned = strspn(url, URL_SCHEME_CHARS); - if (!spanned || !isalpha(url[0]) || spanned + 3 > url_len || - url[spanned] != ':' || url[spanned+1] != '/' || url[spanned+2] != '/') { - if (out_info) { - out_info->url = NULL; - out_info->err = _("invalid URL scheme name or missing '://' suffix"); - } - return NULL; /* Bad scheme and/or missing "://" part */ - } - strbuf_init(&norm, url_len); - scheme_len = spanned; - spanned += 3; - url_len -= spanned; - while (spanned--) - strbuf_addch(&norm, tolower(*url++)); - - - /* - * Copy any username:password if present normalizing %-escapes - */ - at_ptr = strchr(url, '@'); - slash_ptr = url + strcspn(url, "/?#"); - if (at_ptr && at_ptr < slash_ptr) { - user_off = norm.len; - if (at_ptr > url) { - if (!append_normalized_escapes(&norm, url, at_ptr - url, - "", URL_RESERVED)) { - if (out_info) { - out_info->url = NULL; - out_info->err = _("invalid %XX escape sequence"); - } - strbuf_release(&norm); - return NULL; - } - colon_ptr = strchr(norm.buf + scheme_len + 3, ':'); - if (colon_ptr) { - passwd_off = (colon_ptr + 1) - norm.buf; - passwd_len = norm.len - passwd_off; - user_len = (passwd_off - 1) - (scheme_len + 3); - } else { - user_len = norm.len - (scheme_len + 3); - } - } - strbuf_addch(&norm, '@'); - url_len -= (++at_ptr - url); - url = at_ptr; - } - - - /* - * Copy the host part excluding any port part, no %-escapes allowed - */ - if (!url_len || strchr(":/?#", *url)) { - /* Missing host invalid for all URL schemes except file */ - if (strncmp(norm.buf, "file:", 5)) { - if (out_info) { - out_info->url = NULL; - out_info->err = _("missing host and scheme is not 'file:'"); - } - strbuf_release(&norm); - return NULL; - } - } else { - host_off = norm.len; - } - colon_ptr = slash_ptr - 1; - while (colon_ptr > url && *colon_ptr != ':' && *colon_ptr != ']') - colon_ptr--; - if (*colon_ptr != ':') { - colon_ptr = slash_ptr; - } else if (!host_off && colon_ptr < slash_ptr && colon_ptr + 1 != slash_ptr) { - /* file: URLs may not have a port number */ - if (out_info) { - out_info->url = NULL; - out_info->err = _("a 'file:' URL may not have a port number"); - } - strbuf_release(&norm); - return NULL; - } - - if (allow_globs) - spanned = strspn(url, URL_HOST_CHARS "*"); - else - spanned = strspn(url, URL_HOST_CHARS); - - if (spanned < colon_ptr - url) { - /* Host name has invalid characters */ - if (out_info) { - out_info->url = NULL; - out_info->err = _("invalid characters in host name"); - } - strbuf_release(&norm); - return NULL; - } - while (url < colon_ptr) { - strbuf_addch(&norm, tolower(*url++)); - url_len--; - } - - - /* - * Check the port part and copy if not the default (after removing any - * leading 0s); no %-escapes allowed - */ - if (colon_ptr < slash_ptr) { - /* skip the ':' and leading 0s but not the last one if all 0s */ - url++; - url += strspn(url, "0"); - if (url == slash_ptr && url[-1] == '0') - url--; - if (url == slash_ptr) { - /* Skip ":" port with no number, it's same as default */ - } else if (slash_ptr - url == 2 && - !strncmp(norm.buf, "http:", 5) && - !strncmp(url, "80", 2)) { - /* Skip http :80 as it's the default */ - } else if (slash_ptr - url == 3 && - !strncmp(norm.buf, "https:", 6) && - !strncmp(url, "443", 3)) { - /* Skip https :443 as it's the default */ - } else { - /* - * Port number must be all digits with leading 0s removed - * and since all the protocols we deal with have a 16-bit - * port number it must also be in the range 1..65535 - * 0 is not allowed because that means "next available" - * on just about every system and therefore cannot be used - */ - unsigned long pnum = 0; - spanned = strspn(url, URL_DIGIT); - if (spanned < slash_ptr - url) { - /* port number has invalid characters */ - if (out_info) { - out_info->url = NULL; - out_info->err = _("invalid port number"); - } - strbuf_release(&norm); - return NULL; - } - if (slash_ptr - url <= 5) - pnum = strtoul(url, NULL, 10); - if (pnum == 0 || pnum > 65535) { - /* port number not in range 1..65535 */ - if (out_info) { - out_info->url = NULL; - out_info->err = _("invalid port number"); - } - strbuf_release(&norm); - return NULL; - } - strbuf_addch(&norm, ':'); - port_off = norm.len; - strbuf_add(&norm, url, slash_ptr - url); - port_len = slash_ptr - url; - } - url_len -= slash_ptr - colon_ptr; - url = slash_ptr; - } - if (host_off) - host_len = norm.len - host_off - (port_len ? port_len + 1 : 0); - - - /* - * Now copy the path resolving any . and .. segments being careful not - * to corrupt the URL by unescaping any delimiters, but do add an - * initial '/' if it's missing and do normalize any %-escape sequences. - */ - path_off = norm.len; - path_start = norm.buf + path_off; - strbuf_addch(&norm, '/'); - if (*url == '/') { - url++; - url_len--; - } - for (;;) { - const char *seg_start; - size_t seg_start_off = norm.len; - const char *next_slash = url + strcspn(url, "/?#"); - int skip_add_slash = 0; - - /* - * RFC 3689 indicates that any . or .. segments should be - * unescaped before being checked for. - */ - if (!append_normalized_escapes(&norm, url, next_slash - url, "", - URL_RESERVED)) { - if (out_info) { - out_info->url = NULL; - out_info->err = _("invalid %XX escape sequence"); - } - strbuf_release(&norm); - return NULL; - } - - seg_start = norm.buf + seg_start_off; - if (!strcmp(seg_start, ".")) { - /* ignore a . segment; be careful not to remove initial '/' */ - if (seg_start == path_start + 1) { - strbuf_setlen(&norm, norm.len - 1); - skip_add_slash = 1; - } else { - strbuf_setlen(&norm, norm.len - 2); - } - } else if (!strcmp(seg_start, "..")) { - /* - * ignore a .. segment and remove the previous segment; - * be careful not to remove initial '/' from path - */ - const char *prev_slash = norm.buf + norm.len - 3; - if (prev_slash == path_start) { - /* invalid .. because no previous segment to remove */ - if (out_info) { - out_info->url = NULL; - out_info->err = _("invalid '..' path segment"); - } - strbuf_release(&norm); - return NULL; - } - while (*--prev_slash != '/') {} - if (prev_slash == path_start) { - strbuf_setlen(&norm, prev_slash - norm.buf + 1); - skip_add_slash = 1; - } else { - strbuf_setlen(&norm, prev_slash - norm.buf); - } - } - url_len -= next_slash - url; - url = next_slash; - /* if the next char is not '/' done with the path */ - if (*url != '/') - break; - url++; - url_len--; - if (!skip_add_slash) - strbuf_addch(&norm, '/'); - } - path_len = norm.len - path_off; - - - /* - * Now simply copy the rest, if any, only normalizing %-escapes and - * being careful not to corrupt the URL by unescaping any delimiters. - */ - if (*url) { - if (!append_normalized_escapes(&norm, url, url_len, "", URL_RESERVED)) { - if (out_info) { - out_info->url = NULL; - out_info->err = _("invalid %XX escape sequence"); - } - strbuf_release(&norm); - return NULL; - } - } - - - result = strbuf_detach(&norm, &result_len); - if (out_info) { - out_info->url = result; - out_info->err = NULL; - out_info->url_len = result_len; - out_info->scheme_len = scheme_len; - out_info->user_off = user_off; - out_info->user_len = user_len; - out_info->passwd_off = passwd_off; - out_info->passwd_len = passwd_len; - out_info->host_off = host_off; - out_info->host_len = host_len; - out_info->port_off = port_off; - out_info->port_len = port_len; - out_info->path_off = path_off; - out_info->path_len = path_len; - } - return result; -} - -char *url_normalize(const char *url, struct url_info *out_info) -{ - return url_normalize_1(url, out_info, 0); -} - -static size_t url_match_prefix(const char *url, - const char *url_prefix, - size_t url_prefix_len) -{ - /* - * url_prefix matches url if url_prefix is an exact match for url or it - * is a prefix of url and the match ends on a path component boundary. - * Both url and url_prefix are considered to have an implicit '/' on the - * end for matching purposes if they do not already. - * - * url must be NUL terminated. url_prefix_len is the length of - * url_prefix which need not be NUL terminated. - * - * The return value is the length of the match in characters (including - * the final '/' even if it's implicit) or 0 for no match. - * - * Passing NULL as url and/or url_prefix will always cause 0 to be - * returned without causing any faults. - */ - if (!url || !url_prefix) - return 0; - if (!url_prefix_len || (url_prefix_len == 1 && *url_prefix == '/')) - return (!*url || *url == '/') ? 1 : 0; - if (url_prefix[url_prefix_len - 1] == '/') - url_prefix_len--; - if (strncmp(url, url_prefix, url_prefix_len)) - return 0; - if ((strlen(url) == url_prefix_len) || (url[url_prefix_len] == '/')) - return url_prefix_len + 1; - return 0; -} - -static int match_urls(const struct url_info *url, - const struct url_info *url_prefix, - struct urlmatch_item *match) -{ - /* - * url_prefix matches url if the scheme, host and port of url_prefix - * are the same as those of url and the path portion of url_prefix - * is the same as the path portion of url or it is a prefix that - * matches at a '/' boundary. If url_prefix contains a user name, - * that must also exactly match the user name in url. - * - * If the user, host, port and path match in this fashion, the returned - * value is the length of the path match including any implicit - * final '/'. For example, "http://me@example.com/path" is matched by - * "http://example.com" with a path length of 1. - * - * If there is a match and exactusermatch is not NULL, then - * *exactusermatch will be set to true if both url and url_prefix - * contained a user name or false if url_prefix did not have a - * user name. If there is no match *exactusermatch is left untouched. - */ - char usermatched = 0; - size_t pathmatchlen; - - if (!url || !url_prefix || !url->url || !url_prefix->url) - return 0; - - /* check the scheme */ - if (url_prefix->scheme_len != url->scheme_len || - strncmp(url->url, url_prefix->url, url->scheme_len)) - return 0; /* schemes do not match */ - - /* check the user name if url_prefix has one */ - if (url_prefix->user_off) { - if (!url->user_off || url->user_len != url_prefix->user_len || - strncmp(url->url + url->user_off, - url_prefix->url + url_prefix->user_off, - url->user_len)) - return 0; /* url_prefix has a user but it's not a match */ - usermatched = 1; - } - - /* check the host */ - if (!match_host(url, url_prefix)) - return 0; /* host names do not match */ - - /* check the port */ - if (url_prefix->port_len != url->port_len || - strncmp(url->url + url->port_off, - url_prefix->url + url_prefix->port_off, url->port_len)) - return 0; /* ports do not match */ - - /* check the path */ - pathmatchlen = url_match_prefix( - url->url + url->path_off, - url_prefix->url + url_prefix->path_off, - url_prefix->url_len - url_prefix->path_off); - if (!pathmatchlen) - return 0; /* paths do not match */ - - if (match) { - match->hostmatch_len = url_prefix->host_len; - match->pathmatch_len = pathmatchlen; - match->user_matched = usermatched; - } - - return 1; -} - -static int cmp_matches(const struct urlmatch_item *a, - const struct urlmatch_item *b) -{ - if (a->hostmatch_len != b->hostmatch_len) - return a->hostmatch_len < b->hostmatch_len ? -1 : 1; - if (a->pathmatch_len != b->pathmatch_len) - return a->pathmatch_len < b->pathmatch_len ? -1 : 1; - if (a->user_matched != b->user_matched) - return b->user_matched ? -1 : 1; - return 0; -} - -int urlmatch_config_entry(const char *var, const char *value, void *cb) -{ - struct string_list_item *item; - struct urlmatch_config *collect = cb; - struct urlmatch_item matched = {0}; - struct url_info *url = &collect->url; - const char *key, *dot; - struct strbuf synthkey = STRBUF_INIT; - int retval; - - if (!skip_prefix(var, collect->section, &key) || *(key++) != '.') { - if (collect->cascade_fn) - return collect->cascade_fn(var, value, cb); - return 0; /* not interested */ - } - dot = strrchr(key, '.'); - if (dot) { - char *config_url, *norm_url; - struct url_info norm_info; - - config_url = xmemdupz(key, dot - key); - norm_url = url_normalize_1(config_url, &norm_info, 1); - free(config_url); - if (!norm_url) - return 0; - retval = match_urls(url, &norm_info, &matched); - free(norm_url); - if (!retval) - return 0; - key = dot + 1; - } - - if (collect->key && strcmp(key, collect->key)) - return 0; - - item = string_list_insert(&collect->vars, key); - if (!item->util) { - item->util = xcalloc(1, sizeof(matched)); - } else { - if (cmp_matches(&matched, item->util) < 0) - /* - * Our match is worse than the old one, - * we cannot use it. - */ - return 0; - /* Otherwise, replace it with this one. */ - } - - memcpy(item->util, &matched, sizeof(matched)); - strbuf_addstr(&synthkey, collect->section); - strbuf_addch(&synthkey, '.'); - strbuf_addstr(&synthkey, key); - retval = collect->collect_fn(synthkey.buf, value, collect->cb); - - strbuf_release(&synthkey); - return retval; -} |