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| -rw-r--r-- | WWW/Library/Implementation/HTAAUtil.h | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/WWW/Library/Implementation/HTAAUtil.h b/WWW/Library/Implementation/HTAAUtil.h new file mode 100644 index 0000000..33a8ee3 --- /dev/null +++ b/WWW/Library/Implementation/HTAAUtil.h @@ -0,0 +1,318 @@ +/* + * $LynxId: HTAAUtil.h,v 1.13 2010/10/27 00:09:52 tom Exp $ + * + * Utilities for the Authorization parts of libwww + * COMMON PARTS OF AUTHORIZATION MODULE TO BOTH SERVER AND BROWSER + * + * This module is the interface to the common parts of Access Authorization (AA) package + * for both server and browser. Important to know about memory allocation: + * + * Routines in this module use dynamic allocation, but free automatically all the memory + * reserved by them. + * + * Therefore the caller never has to (and never should) free() any object returned by + * these functions. + * + * Therefore also all the strings returned by this package are only valid until the next + * call to the same function is made. This approach is selected, because of the nature of + * access authorization: no string returned by the package needs to be valid longer than + * until the next call. + * + * This also makes it easy to plug the AA package in: you don't have to ponder whether to + * free() something here or is it done somewhere else (because it is always done somewhere + * else). + * + * The strings that the package needs to store are copied so the original strings given as + * parameters to AA functions may be freed or modified with no side effects. + * + * Also note: The AA package does not free() anything else than what it has itself + * allocated. + * + */ + +#ifndef HTAAUTIL_H +#define HTAAUTIL_H + +#include <HTList.h> + +#ifdef __cplusplus +extern "C" { +#endif +/* + * Numeric constants + */ +#define MAX_USERNAME_LEN 16 /* @@ Longest allowed username */ +#define MAX_PASSWORD_LEN 3*13 /* @@ Longest allowed password */ + /* (encrypted, so really only 3*8) */ +#define MAX_METHODNAME_LEN 12 /* @@ Longest allowed method name */ +#define MAX_FIELDNAME_LEN 16 /* @@ Longest field name in */ + /* protection setup file */ +#define MAX_PATHNAME_LEN 80 /* @@ Longest passwd/group file */ +/* pathname to allow */ +/* + + Datatype definitions + + HTAASCHEME + + The enumeration HTAAScheme represents the possible authentication schemes used by the + WWW Access Authorization. + + */ typedef enum { + HTAA_UNKNOWN, + HTAA_NONE, + HTAA_BASIC, + HTAA_PUBKEY, + HTAA_KERBEROS_V4, + HTAA_KERBEROS_V5, + HTAA_MAX_SCHEMES /* THIS MUST ALWAYS BE LAST! Number of schemes */ + } HTAAScheme; + +/* + + ENUMERATION TO REPRESENT HTTP METHODS + + */ + + typedef enum { + METHOD_UNKNOWN, + METHOD_GET, + METHOD_PUT + } HTAAMethod; + +/* + +Authentication Schemes + + */ + +/* PUBLIC HTAAScheme_enum() + * TRANSLATE SCHEME NAME TO A SCHEME ENUMERATION + * ON ENTRY: + * name is a string representing the scheme name. + * + * ON EXIT: + * returns the enumerated constant for that scheme. + */ + extern HTAAScheme HTAAScheme_enum(const char *name); + +/* PUBLIC HTAAScheme_name() + * GET THE NAME OF A GIVEN SCHEME + * ON ENTRY: + * scheme is one of the scheme enum values: + * HTAA_NONE, HTAA_BASIC, HTAA_PUBKEY, ... + * + * ON EXIT: + * returns the name of the scheme, i.e. + * "none", "basic", "pubkey", ... + */ + extern const char *HTAAScheme_name(HTAAScheme scheme); + +/* + +Methods + + */ + +/* PUBLIC HTAAMethod_enum() + * TRANSLATE METHOD NAME INTO AN ENUMERATED VALUE + * ON ENTRY: + * name is the method name to translate. + * + * ON EXIT: + * returns HTAAMethod enumerated value corresponding + * to the given name. + */ + extern HTAAMethod HTAAMethod_enum(const char *name); + +/* PUBLIC HTAAMethod_name() + * GET THE NAME OF A GIVEN METHOD + * ON ENTRY: + * method is one of the method enum values: + * METHOD_GET, METHOD_PUT, ... + * + * ON EXIT: + * returns the name of the scheme, i.e. + * "GET", "PUT", ... + */ + extern const char *HTAAMethod_name(HTAAMethod method); + +/* PUBLIC HTAAMethod_inList() + * IS A METHOD IN A LIST OF METHOD NAMES + * ON ENTRY: + * method is the method to look for. + * list is a list of method names. + * + * ON EXIT: + * returns YES, if method was found. + * NO, if not found. + */ + extern BOOL HTAAMethod_inList(HTAAMethod method, HTList *list); + +/* + +Match Template Against Filename + + */ + +/* PUBLIC HTAA_templateMatch() + * STRING COMPARISON FUNCTION FOR FILE NAMES + * WITH ONE WILDCARD * IN THE TEMPLATE + * NOTE: + * This is essentially the same code as in HTRules.c, but it + * cannot be used because it is embedded in between other code. + * (In fact, HTRules.c should use this routine, but then this + * routine would have to be more sophisticated... why is life + * sometimes so hard...) + * + * ON ENTRY: + * ctemplate is a template string to match the file name + * against, may contain a single wildcard + * character * which matches zero or more + * arbitrary characters. + * filename is the filename (or pathname) to be matched + * against the template. + * + * ON EXIT: + * returns YES, if filename matches the template. + * NO, otherwise. + */ + extern BOOL HTAA_templateMatch(const char *ctemplate, + const char *filename); + +/* PUBLIC HTAA_templateCaseMatch() + * STRING COMPARISON FUNCTION FOR FILE NAMES + * WITH ONE WILDCARD * IN THE TEMPLATE (Case Insensitive) + * NOTE: + * This is essentially the same code as in HTAA_templateMatch, but + * it compares case insensitive (for VMS). Reason for this routine + * is that HTAA_templateMatch gets called from several places, also + * there where a case sensitive match is needed, so one cannot just + * change the HTAA_templateMatch routine for VMS. + * + * ON ENTRY: + * ctemplate is a template string to match the file name + * against, may contain a single wildcard + * character * which matches zero or more + * arbitrary characters. + * filename is the filename (or pathname) to be matched + * against the template. + * + * ON EXIT: + * returns YES, if filename matches the template. + * NO, otherwise. + */ + extern BOOL HTAA_templateCaseMatch(const char *ctemplate, + const char *filename); + +/* PUBLIC HTAA_makeProtectionTemplate() + * CREATE A PROTECTION TEMPLATE FOR THE FILES + * IN THE SAME DIRECTORY AS THE GIVEN FILE + * (Used by server if there is no fancier way for + * it to tell the client, and by browser if server + * didn't send WWW-ProtectionTemplate: field) + * ON ENTRY: + * docname is the document pathname (from URL). + * + * ON EXIT: + * returns a template matching docname, and other files + * files in that directory. + * + * E.g. /foo/bar/x.html => /foo/bar/ * + * ^ + * Space only to prevent it from + * being a comment marker here, + * there really isn't any space. + */ + extern char *HTAA_makeProtectionTemplate(const char *docname); + +/* + +MIME Argument List Parser + + */ + +/* PUBLIC HTAA_parseArgList() + * PARSE AN ARGUMENT LIST GIVEN IN A HEADER FIELD + * ON ENTRY: + * str is a comma-separated list: + * + * item, item, item + * where + * item ::= value + * | name=value + * | name="value" + * + * Leading and trailing whitespace is ignored + * everywhere except inside quotes, so the following + * examples are equal: + * + * name=value,foo=bar + * name="value",foo="bar" + * name = value , foo = bar + * name = "value" , foo = "bar" + * + * ON EXIT: + * returns a list of name-value pairs (actually HTAssocList*). + * For items with no name, just value, the name is + * the number of order number of that item. E.g. + * "1" for the first, etc. + */ + extern HTList *HTAA_parseArgList(char *str); + +/* + +Header Line Reader + + */ + +/* PUBLIC HTAA_setupReader() + * SET UP HEADER LINE READER, i.e., give + * the already-read-but-not-yet-processed + * buffer of text to be read before more + * is read from the socket. + * ON ENTRY: + * start_of_headers is a pointer to a buffer containing + * the beginning of the header lines + * (rest will be read from a socket). + * length is the number of valid characters in + * 'start_of_headers' buffer. + * soc is the socket to use when start_of_headers + * buffer is used up. + * ON EXIT: + * returns nothing. + * Subsequent calls to HTAA_getUnfoldedLine() + * will use this buffer first and then + * proceed to read from socket. + */ + extern void HTAA_setupReader(char *start_of_headers, + size_t length, + int soc); + +/* PUBLIC HTAA_getUnfoldedLine() + * READ AN UNFOLDED HEADER LINE FROM SOCKET + * ON ENTRY: + * HTAA_setupReader must absolutely be called before + * this function to set up internal buffer. + * + * ON EXIT: + * returns a newly-allocated character string representing + * the read line. The line is unfolded, i.e. + * lines that begin with whitespace are appended + * to current line. E.g. + * + * Field-Name: Blaa-Blaa + * This-Is-A-Continuation-Line + * Here-Is_Another + * + * is seen by the caller as: + * + * Field-Name: Blaa-Blaa This-Is-A-Continuation-Line Here-Is_Another + * + */ + extern char *HTAA_getUnfoldedLine(void); + +#ifdef __cplusplus +} +#endif +#endif /* NOT HTAAUTIL_H */ |