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157 lines
6.4 KiB
C
157 lines
6.4 KiB
C
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape security libraries.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1994-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* Header file for routines specific to S/MIME. Keep things that are pure
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* pkcs7 out of here; this is for S/MIME policy, S/MIME interoperability, etc.
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*
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* $Id: smime.h,v 1.8 2004/04/25 15:03:16 gerv%gerv.net Exp $
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*/
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#ifndef _SECMIME_H_
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#define _SECMIME_H_ 1
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#include "cms.h"
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/************************************************************************/
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SEC_BEGIN_PROTOS
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/*
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* Initialize the local recording of the user S/MIME cipher preferences.
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* This function is called once for each cipher, the order being
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* important (first call records greatest preference, and so on).
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* When finished, it is called with a "which" of CIPHER_FAMILID_MASK.
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* If the function is called again after that, it is assumed that
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* the preferences are being reset, and the old preferences are
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* discarded.
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*
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* XXX This is for a particular user, and right now the storage is
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* XXX local, static. The preference should be stored elsewhere to allow
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* XXX for multiple uses of one library? How does SSL handle this;
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* XXX it has something similar?
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*
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* - The "which" values are defined in ciferfam.h (the SMIME_* values,
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* for example SMIME_DES_CBC_56).
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* - If "on" is non-zero then the named cipher is enabled, otherwise
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* it is disabled. (It is not necessary to call the function for
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* ciphers that are disabled, however, as that is the default.)
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*
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* If the cipher preference is successfully recorded, SECSuccess
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* is returned. Otherwise SECFailure is returned. The only errors
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* are due to failure allocating memory or bad parameters/calls:
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* SEC_ERROR_XXX ("which" is not in the S/MIME cipher family)
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* SEC_ERROR_XXX (function is being called more times than there
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* are known/expected ciphers)
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*/
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extern SECStatus NSS_SMIMEUtil_EnableCipher(long which, int on);
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/*
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* Initialize the local recording of the S/MIME policy.
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* This function is called to allow/disallow a particular cipher.
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*
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* XXX This is for a the current module, I think, so local, static storage
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* XXX is okay. Is that correct, or could multiple uses of the same
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* XXX library expect to operate under different policies?
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*
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* - The "which" values are defined in ciferfam.h (the SMIME_* values,
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* for example SMIME_DES_CBC_56).
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* - If "on" is non-zero then the named cipher is enabled, otherwise
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* it is disabled.
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*/
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extern SECStatus NSS_SMIMEUtils_AllowCipher(long which, int on);
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/*
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* Does the current policy allow S/MIME decryption of this particular
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* algorithm and keysize?
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*/
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extern PRBool NSS_SMIMEUtil_DecryptionAllowed(SECAlgorithmID *algid, PK11SymKey *key);
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/*
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* Does the current policy allow *any* S/MIME encryption (or decryption)?
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*
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* This tells whether or not *any* S/MIME encryption can be done,
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* according to policy. Callers may use this to do nicer user interface
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* (say, greying out a checkbox so a user does not even try to encrypt
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* a message when they are not allowed to) or for any reason they want
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* to check whether S/MIME encryption (or decryption, for that matter)
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* may be done.
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*
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* It takes no arguments. The return value is a simple boolean:
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* PR_TRUE means encryption (or decryption) is *possible*
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* (but may still fail due to other reasons, like because we cannot
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* find all the necessary certs, etc.; PR_TRUE is *not* a guarantee)
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* PR_FALSE means encryption (or decryption) is not permitted
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*
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* There are no errors from this routine.
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*/
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extern PRBool NSS_SMIMEUtil_EncryptionPossible(void);
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/*
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* NSS_SMIMEUtil_CreateSMIMECapabilities - get S/MIME capabilities attr value
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*
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* scans the list of allowed and enabled ciphers and construct a PKCS9-compliant
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* S/MIME capabilities attribute value.
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*/
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extern SECStatus NSS_SMIMEUtil_CreateSMIMECapabilities(PLArenaPool *poolp, SECItem *dest, PRBool includeFortezzaCiphers);
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/*
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* NSS_SMIMEUtil_CreateSMIMEEncKeyPrefs - create S/MIME encryption key preferences attr value
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*/
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extern SECStatus NSS_SMIMEUtil_CreateSMIMEEncKeyPrefs(PLArenaPool *poolp, SECItem *dest, CERTCertificate *cert);
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/*
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* NSS_SMIMEUtil_CreateMSSMIMEEncKeyPrefs - create S/MIME encryption key preferences attr value using MS oid
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*/
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extern SECStatus NSS_SMIMEUtil_CreateMSSMIMEEncKeyPrefs(PLArenaPool *poolp, SECItem *dest, CERTCertificate *cert);
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/*
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* NSS_SMIMEUtil_GetCertFromEncryptionKeyPreference - find cert marked by EncryptionKeyPreference
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* attribute
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*/
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extern CERTCertificate *NSS_SMIMEUtil_GetCertFromEncryptionKeyPreference(CERTCertDBHandle *certdb, SECItem *DERekp);
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/*
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* NSS_SMIMEUtil_FindBulkAlgForRecipients - find bulk algorithm suitable for all recipients
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*/
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extern SECStatus
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NSS_SMIMEUtil_FindBulkAlgForRecipients(CERTCertificate **rcerts, SECOidTag *bulkalgtag, int *keysize);
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/************************************************************************/
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SEC_END_PROTOS
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#endif /* _SECMIME_H_ */
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