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154 lines
6.1 KiB
C
154 lines
6.1 KiB
C
/*
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* The contents of this file are subject to the Mozilla 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/MPL/
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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 the Netscape security libraries.
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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) 1994-2000 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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* Alternatively, the contents of this file may be used under the
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* terms of the GNU General Public License Version 2 or later (the
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* "GPL"), in which case the provisions of the GPL are applicable
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* instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the GPL and not to
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* allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by
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* the GPL. If you do not delete the provisions above, a recipient
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* may use your version of this file under either the MPL or the
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* GPL.
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*/
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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 1.7 2002/08/27 13:14:39 kaie%netscape.com 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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