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153 lines
5.4 KiB
C
153 lines
5.4 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/* mimemsig.h --- definition of the MimeMultipartSigned class (see mimei.h)
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Created: Jamie Zawinski <jwz@netscape.com>, 23-Sep-96.
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*/
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#ifndef _MIMEMSIG_H_
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#define _MIMEMSIG_H_
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#include "mimemult.h"
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#include "mimepbuf.h"
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#include "mimeenc.h"
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/* 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.
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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
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used to initialize the decryption engine. NULL indicates failure;
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otherwise, an opaque closure object should be returned.
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int bigfun_data_hash (char *data, int32 data_size,
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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,
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MimeHeaders *signature_hdrs)
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This is called after bigfun_data_eof() and just before the first call to
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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
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signature object itself.
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int bigfun_signature_hash (char *data, int32 data_size,
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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'.
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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
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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
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`bigfun_emit_html'. It is intended to free any data represented by the
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bigfun_closure.
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*/
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typedef struct MimeMultipartSignedClass MimeMultipartSignedClass;
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typedef struct MimeMultipartSigned MimeMultipartSigned;
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typedef enum {
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MimeMultipartSignedPreamble,
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MimeMultipartSignedBodyFirstHeader,
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MimeMultipartSignedBodyHeaders,
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MimeMultipartSignedBodyFirstLine,
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MimeMultipartSignedBodyLine,
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MimeMultipartSignedSignatureHeaders,
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MimeMultipartSignedSignatureFirstLine,
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MimeMultipartSignedSignatureLine,
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MimeMultipartSignedEpilogue
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} MimeMultipartSignedParseState;
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struct MimeMultipartSignedClass {
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MimeMultipartClass multipart;
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/* 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,
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void *bigfun_closure);
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int (*bigfun_signature_hash) (char *data, int32 data_size,
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void *bigfun_closure);
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int (*bigfun_data_eof) (void *bigfun_closure, XP_Bool abort_p);
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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,
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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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};
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extern MimeMultipartSignedClass mimeMultipartSignedClass;
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struct MimeMultipartSigned {
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MimeMultipart multipart;
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MimeMultipartSignedParseState state; /* State of parser */
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void *bigfun_closure; /* Opaque data used by signature
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verification module. */
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MimeHeaders *body_hdrs; /* The headers of the signed object. */
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MimeHeaders *sig_hdrs; /* The headers of the signature. */
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MimePartBufferData *part_buffer; /* The buffered body of the signed
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object (see mimepbuf.h) */
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MimeDecoderData *sig_decoder_data; /* The signature is probably base64
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encoded; this is the decoder used
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to get raw bits out of it. */
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};
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#endif /* _MIMEMSIG_H_ */
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