pjs/lib/libmime/mimemsig.h

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/* mimemsig.h --- definition of the MimeMultipartSigned class (see mimei.h)
Created: Jamie Zawinski <jwz@netscape.com>, 23-Sep-96.
*/
#ifndef _MIMEMSIG_H_
#define _MIMEMSIG_H_
#include "mimemult.h"
#include "mimepbuf.h"
#include "mimeenc.h"
/* The MimeMultipartSigned class implements the multipart/signed MIME
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container, which provides a general method of associating a bigfun
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signature to an arbitrary MIME object.
The MimeMultipartSigned class provides the following methods:
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void *bigfun_init (MimeObject *multipart_object)
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This is called with the object, the object->headers of which should be
used to initialize the decryption engine. NULL indicates failure;
otherwise, an opaque closure object should be returned.
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int bigfun_data_hash (char *data, int32 data_size,
void *bigfun_closure)
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This is called with the raw data, for which a signature has been computed.
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The bigfun module should examine this, and compute a signature for it.
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int bigfun_data_eof (void *bigfun_closure, XP_Bool abort_p)
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This is called when no more data remains. If `abort_p' is true, then the
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bigfun module may choose to discard any data rather than processing it,
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as we're terminating abnormally.
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int bigfun_signature_init (void *bigfun_closure,
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MimeObject *multipart_object,
MimeHeaders *signature_hdrs)
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This is called after bigfun_data_eof() and just before the first call to
bigfun_signature_hash(). The bigfun module may wish to do some
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initialization here, or may wish to examine the actual headers of the
signature object itself.
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int bigfun_signature_hash (char *data, int32 data_size,
void *bigfun_closure)
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This is called with the raw data of the detached signature block. It will
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be called after bigfun_data_eof() has been called to signify the end of
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the data which is signed. This data is the data of the signature itself.
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int bigfun_signature_eof (void *bigfun_closure, XP_Bool abort_p)
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This is called when no more signature data remains. If `abort_p' is true,
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then the bigfun module may choose to discard any data rather than
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processing it, as we're terminating abnormally.
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char * bigfun_generate_html (void *bigfun_closure)
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This is called after `bigfun_signature_eof' but before `bigfun_free'.
The bigfun module should return a newly-allocated string of HTML code
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which explains the status of the decryption to the user (whether the
signature checks out, etc.)
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void bigfun_free (void *bigfun_closure)
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This will be called when we're all done, after `bigfun_signature_eof' and
`bigfun_emit_html'. It is intended to free any data represented by the
bigfun_closure.
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*/
typedef struct MimeMultipartSignedClass MimeMultipartSignedClass;
typedef struct MimeMultipartSigned MimeMultipartSigned;
typedef enum {
MimeMultipartSignedPreamble,
MimeMultipartSignedBodyFirstHeader,
MimeMultipartSignedBodyHeaders,
MimeMultipartSignedBodyFirstLine,
MimeMultipartSignedBodyLine,
MimeMultipartSignedSignatureHeaders,
MimeMultipartSignedSignatureFirstLine,
MimeMultipartSignedSignatureLine,
MimeMultipartSignedEpilogue
} MimeMultipartSignedParseState;
struct MimeMultipartSignedClass {
MimeMultipartClass multipart;
/* Callbacks used by decryption (really, signature verification) module. */
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void * (*bigfun_init) (MimeObject *multipart_object);
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int (*bigfun_data_hash) (char *data, int32 data_size,
void *bigfun_closure);
int (*bigfun_signature_hash) (char *data, int32 data_size,
void *bigfun_closure);
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int (*bigfun_data_eof) (void *bigfun_closure, XP_Bool abort_p);
int (*bigfun_signature_eof) (void *bigfun_closure, XP_Bool abort_p);
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int (*bigfun_signature_init) (void *bigfun_closure,
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MimeObject *multipart_object,
MimeHeaders *signature_hdrs);
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char * (*bigfun_generate_html) (void *bigfun_closure);
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void (*bigfun_free) (void *bigfun_closure);
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};
extern MimeMultipartSignedClass mimeMultipartSignedClass;
struct MimeMultipartSigned {
MimeMultipart multipart;
MimeMultipartSignedParseState state; /* State of parser */
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void *bigfun_closure; /* Opaque data used by signature
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verification module. */
MimeHeaders *body_hdrs; /* The headers of the signed object. */
MimeHeaders *sig_hdrs; /* The headers of the signature. */
MimePartBufferData *part_buffer; /* The buffered body of the signed
object (see mimepbuf.h) */
MimeDecoderData *sig_decoder_data; /* The signature is probably base64
encoded; this is the decoder used
to get raw bits out of it. */
};
#endif /* _MIMEMSIG_H_ */