michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  * Support for encoding/decoding of ASN.1 using BER/DER (Basic/Distinguished
michael@0:  * Encoding Rules).  The routines are found in and used extensively by the
michael@0:  * security library, but exported for other use.
michael@0:  */
michael@0: 
michael@0: #ifndef _SECASN1_H_
michael@0: #define _SECASN1_H_
michael@0: 
michael@0: #include "utilrename.h"
michael@0: #include "plarena.h"
michael@0: 
michael@0: #include "seccomon.h"
michael@0: #include "secasn1t.h"
michael@0: 
michael@0: 
michael@0: /************************************************************************/
michael@0: SEC_BEGIN_PROTOS
michael@0: 
michael@0: /*
michael@0:  * XXX These function prototypes need full, explanatory comments.
michael@0:  */
michael@0: 
michael@0: /*
michael@0: ** Decoding.
michael@0: */
michael@0: 
michael@0: extern SEC_ASN1DecoderContext *SEC_ASN1DecoderStart(PLArenaPool *pool,
michael@0: 						    void *dest,
michael@0: 						    const SEC_ASN1Template *t);
michael@0: 
michael@0: /* XXX char or unsigned char? */
michael@0: extern SECStatus SEC_ASN1DecoderUpdate(SEC_ASN1DecoderContext *cx,
michael@0: 				       const char *buf,
michael@0: 				       unsigned long len);
michael@0: 
michael@0: extern SECStatus SEC_ASN1DecoderFinish(SEC_ASN1DecoderContext *cx);
michael@0: 
michael@0: /* Higher level code detected an error, abort the rest of the processing */
michael@0: extern void SEC_ASN1DecoderAbort(SEC_ASN1DecoderContext *cx, int error);
michael@0: 
michael@0: extern void SEC_ASN1DecoderSetFilterProc(SEC_ASN1DecoderContext *cx,
michael@0: 					 SEC_ASN1WriteProc fn,
michael@0: 					 void *arg, PRBool no_store);
michael@0: 
michael@0: extern void SEC_ASN1DecoderClearFilterProc(SEC_ASN1DecoderContext *cx);
michael@0: 
michael@0: extern void SEC_ASN1DecoderSetNotifyProc(SEC_ASN1DecoderContext *cx,
michael@0: 					 SEC_ASN1NotifyProc fn,
michael@0: 					 void *arg);
michael@0: 
michael@0: extern void SEC_ASN1DecoderClearNotifyProc(SEC_ASN1DecoderContext *cx);
michael@0: 
michael@0: extern SECStatus SEC_ASN1Decode(PLArenaPool *pool, void *dest,
michael@0: 				const SEC_ASN1Template *t,
michael@0: 				const char *buf, long len);
michael@0: 
michael@0: /* Both classic ASN.1 and QuickDER have a feature that removes leading zeroes
michael@0:    out of SEC_ASN1_INTEGER if the caller sets siUnsignedInteger in the type
michael@0:    field of the target SECItem prior to calling the decoder. Otherwise, the
michael@0:    type field is ignored and untouched. For SECItem that are dynamically
michael@0:    allocated (from POINTER, SET OF, SEQUENCE OF) the decoder sets the type
michael@0:    field to siBuffer. */
michael@0: 
michael@0: extern SECStatus SEC_ASN1DecodeItem(PLArenaPool *pool, void *dest,
michael@0: 				    const SEC_ASN1Template *t,
michael@0: 				    const SECItem *src);
michael@0: 
michael@0: extern SECStatus SEC_QuickDERDecodeItem(PLArenaPool* arena, void* dest,
michael@0:                      const SEC_ASN1Template* templateEntry,
michael@0:                      const SECItem* src);
michael@0: 
michael@0: /*
michael@0: ** Encoding.
michael@0: */
michael@0: 
michael@0: extern SEC_ASN1EncoderContext *SEC_ASN1EncoderStart(const void *src,
michael@0: 						    const SEC_ASN1Template *t,
michael@0: 						    SEC_ASN1WriteProc fn,
michael@0: 						    void *output_arg);
michael@0: 
michael@0: /* XXX char or unsigned char? */
michael@0: extern SECStatus SEC_ASN1EncoderUpdate(SEC_ASN1EncoderContext *cx,
michael@0: 				       const char *buf,
michael@0: 				       unsigned long len);
michael@0: 
michael@0: extern void SEC_ASN1EncoderFinish(SEC_ASN1EncoderContext *cx);
michael@0: 
michael@0: /* Higher level code detected an error, abort the rest of the processing */
michael@0: extern void SEC_ASN1EncoderAbort(SEC_ASN1EncoderContext *cx, int error);
michael@0: 
michael@0: extern void SEC_ASN1EncoderSetNotifyProc(SEC_ASN1EncoderContext *cx,
michael@0: 					 SEC_ASN1NotifyProc fn,
michael@0: 					 void *arg);
michael@0: 
michael@0: extern void SEC_ASN1EncoderClearNotifyProc(SEC_ASN1EncoderContext *cx);
michael@0: 
michael@0: extern void SEC_ASN1EncoderSetStreaming(SEC_ASN1EncoderContext *cx);
michael@0: 
michael@0: extern void SEC_ASN1EncoderClearStreaming(SEC_ASN1EncoderContext *cx);
michael@0: 
michael@0: extern void sec_ASN1EncoderSetDER(SEC_ASN1EncoderContext *cx);
michael@0: 
michael@0: extern void sec_ASN1EncoderClearDER(SEC_ASN1EncoderContext *cx);
michael@0: 
michael@0: extern void SEC_ASN1EncoderSetTakeFromBuf(SEC_ASN1EncoderContext *cx);
michael@0: 
michael@0: extern void SEC_ASN1EncoderClearTakeFromBuf(SEC_ASN1EncoderContext *cx);
michael@0: 
michael@0: extern SECStatus SEC_ASN1Encode(const void *src, const SEC_ASN1Template *t,
michael@0: 				SEC_ASN1WriteProc output_proc,
michael@0: 				void *output_arg);
michael@0: 
michael@0: /*
michael@0:  * If both pool and dest are NULL, the caller should free the returned SECItem
michael@0:  * with a SECITEM_FreeItem(..., PR_TRUE) call.  If pool is NULL but dest is
michael@0:  * not NULL, the caller should free the data buffer pointed to by dest with a
michael@0:  * SECITEM_FreeItem(dest, PR_FALSE) or PORT_Free(dest->data) call.
michael@0:  */
michael@0: extern SECItem * SEC_ASN1EncodeItem(PLArenaPool *pool, SECItem *dest,
michael@0: 				    const void *src, const SEC_ASN1Template *t);
michael@0: 
michael@0: extern SECItem * SEC_ASN1EncodeInteger(PLArenaPool *pool,
michael@0: 				       SECItem *dest, long value);
michael@0: 
michael@0: extern SECItem * SEC_ASN1EncodeUnsignedInteger(PLArenaPool *pool,
michael@0: 					       SECItem *dest,
michael@0: 					       unsigned long value);
michael@0: 
michael@0: extern SECStatus SEC_ASN1DecodeInteger(SECItem *src,
michael@0: 				       unsigned long *value);
michael@0: 
michael@0: /*
michael@0: ** Utilities.
michael@0: */
michael@0: 
michael@0: /*
michael@0:  * We have a length that needs to be encoded; how many bytes will the
michael@0:  * encoding take?
michael@0:  */
michael@0: extern int SEC_ASN1LengthLength (unsigned long len);
michael@0: 
michael@0: /* encode the length and return the number of bytes we encoded. Buffer
michael@0:  * must be pre allocated  */
michael@0: extern int SEC_ASN1EncodeLength(unsigned char *buf,int value);
michael@0: 
michael@0: /*
michael@0:  * Find the appropriate subtemplate for the given template.
michael@0:  * This may involve calling a "chooser" function, or it may just
michael@0:  * be right there.  In either case, it is expected to *have* a
michael@0:  * subtemplate; this is asserted in debug builds (in non-debug
michael@0:  * builds, NULL will be returned).
michael@0:  *
michael@0:  * "thing" is a pointer to the structure being encoded/decoded
michael@0:  * "encoding", when true, means that we are in the process of encoding
michael@0:  *	(as opposed to in the process of decoding)
michael@0:  */
michael@0: extern const SEC_ASN1Template *
michael@0: SEC_ASN1GetSubtemplate (const SEC_ASN1Template *inTemplate, void *thing,
michael@0: 			PRBool encoding);
michael@0: 
michael@0: /* whether the template is for a primitive type or a choice of
michael@0:  * primitive types
michael@0:  */
michael@0: extern PRBool SEC_ASN1IsTemplateSimple(const SEC_ASN1Template *theTemplate);
michael@0: 
michael@0: /************************************************************************/
michael@0: 
michael@0: /*
michael@0:  * Generic Templates
michael@0:  * One for each of the simple types, plus a special one for ANY, plus:
michael@0:  *	- a pointer to each one of those
michael@0:  *	- a set of each one of those
michael@0:  *	- a sequence of each one of those
michael@0:  *
michael@0:  * Note that these are alphabetical (case insensitive); please add new
michael@0:  * ones in the appropriate place.
michael@0:  */
michael@0: 
michael@0: extern const SEC_ASN1Template SEC_AnyTemplate[];
michael@0: extern const SEC_ASN1Template SEC_BitStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_BMPStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_BooleanTemplate[];
michael@0: extern const SEC_ASN1Template SEC_EnumeratedTemplate[];
michael@0: extern const SEC_ASN1Template SEC_GeneralizedTimeTemplate[];
michael@0: extern const SEC_ASN1Template SEC_IA5StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_IntegerTemplate[];
michael@0: extern const SEC_ASN1Template SEC_NullTemplate[];
michael@0: extern const SEC_ASN1Template SEC_ObjectIDTemplate[];
michael@0: extern const SEC_ASN1Template SEC_OctetStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PrintableStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_T61StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_UniversalStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_UTCTimeTemplate[];
michael@0: extern const SEC_ASN1Template SEC_UTF8StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_VisibleStringTemplate[];
michael@0: 
michael@0: extern const SEC_ASN1Template SEC_PointerToAnyTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToBitStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToBMPStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToBooleanTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToEnumeratedTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToGeneralizedTimeTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToIA5StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToIntegerTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToNullTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToObjectIDTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToOctetStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToPrintableStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToT61StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToUniversalStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToUTCTimeTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToUTF8StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_PointerToVisibleStringTemplate[];
michael@0: 
michael@0: extern const SEC_ASN1Template SEC_SequenceOfAnyTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfBitStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfBMPStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfBooleanTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfEnumeratedTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfGeneralizedTimeTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfIA5StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfIntegerTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfNullTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfObjectIDTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfOctetStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfPrintableStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfT61StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfUniversalStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfUTCTimeTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfUTF8StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SequenceOfVisibleStringTemplate[];
michael@0: 
michael@0: extern const SEC_ASN1Template SEC_SetOfAnyTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfBitStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfBMPStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfBooleanTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfEnumeratedTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfGeneralizedTimeTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfIA5StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfIntegerTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfNullTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfObjectIDTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfOctetStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfPrintableStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfT61StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfUniversalStringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfUTCTimeTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfUTF8StringTemplate[];
michael@0: extern const SEC_ASN1Template SEC_SetOfVisibleStringTemplate[];
michael@0: 
michael@0: /*
michael@0:  * Template for skipping a subitem; this only makes sense when decoding.
michael@0:  */
michael@0: extern const SEC_ASN1Template SEC_SkipTemplate[];
michael@0: 
michael@0: /* These functions simply return the address of the above-declared templates.
michael@0: ** This is necessary for Windows DLLs.  Sigh.
michael@0: */
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_AnyTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_BMPStringTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_BooleanTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_BitStringTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_GeneralizedTimeTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_IA5StringTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_IntegerTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_NullTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_ObjectIDTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_OctetStringTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_UTCTimeTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_UTF8StringTemplate)
michael@0: 
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_PointerToAnyTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_PointerToOctetStringTemplate)
michael@0: 
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_SetOfAnyTemplate)
michael@0: 
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_EnumeratedTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_PointerToEnumeratedTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_SequenceOfAnyTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_SequenceOfObjectIDTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_SkipTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_UniversalStringTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_PrintableStringTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_T61StringTemplate)
michael@0: SEC_ASN1_CHOOSER_DECLARE(SEC_PointerToGeneralizedTimeTemplate)
michael@0: SEC_END_PROTOS
michael@0: #endif /* _SECASN1_H_ */