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180 lines
6.9 KiB
C
180 lines
6.9 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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* Support routines for PKCS7 implementation, none of which are exported.
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* This file should only contain things that are needed by both the
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* encoding/creation side *and* the decoding/decryption side. Anything
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* else should just be static routines in the appropriate file.
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*
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* Do not export this file! If something in here is really needed outside
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* of pkcs7 code, first try to add a PKCS7 interface which will do it for
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* you. If that has a problem, then just move out what you need, changing
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* its name as appropriate!
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*
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* $Id: p7local.h,v 1.2 2004/04/25 15:03:13 gerv%gerv.net Exp $
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*/
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#ifndef _P7LOCAL_H_
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#define _P7LOCAL_H_
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#include "secpkcs7.h"
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#include "secasn1t.h"
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extern const SEC_ASN1Template sec_PKCS7ContentInfoTemplate[];
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/* opaque objects */
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typedef struct sec_pkcs7_cipher_object sec_PKCS7CipherObject;
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/************************************************************************/
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SEC_BEGIN_PROTOS
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/*
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* Look through a set of attributes and find one that matches the
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* specified object ID. If "only" is true, then make sure that
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* there is not more than one attribute of the same type. Otherwise,
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* just return the first one found. (XXX Does anybody really want
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* that first-found behavior? It was like that when I found it...)
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*/
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extern SEC_PKCS7Attribute *sec_PKCS7FindAttribute (SEC_PKCS7Attribute **attrs,
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SECOidTag oidtag,
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PRBool only);
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/*
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* Return the single attribute value, doing some sanity checking first:
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* - Multiple values are *not* expected.
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* - Empty values are *not* expected.
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*/
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extern SECItem *sec_PKCS7AttributeValue (SEC_PKCS7Attribute *attr);
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/*
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* Encode a set of attributes (found in "src").
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*/
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extern SECItem *sec_PKCS7EncodeAttributes (PRArenaPool *poolp,
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SECItem *dest, void *src);
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/*
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* Make sure that the order of the attributes guarantees valid DER
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* (which must be in lexigraphically ascending order for a SET OF);
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* if reordering is necessary it will be done in place (in attrs).
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*/
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extern SECStatus sec_PKCS7ReorderAttributes (SEC_PKCS7Attribute **attrs);
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/*
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* Create a context for decrypting, based on the given key and algorithm.
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*/
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extern sec_PKCS7CipherObject *
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sec_PKCS7CreateDecryptObject (PK11SymKey *key, SECAlgorithmID *algid);
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/*
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* Create a context for encrypting, based on the given key and algorithm,
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* and fill in the algorithm id.
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*/
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extern sec_PKCS7CipherObject *
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sec_PKCS7CreateEncryptObject (PRArenaPool *poolp, PK11SymKey *key,
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SECOidTag algtag, SECAlgorithmID *algid);
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/*
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* Destroy the given decryption or encryption object.
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*/
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extern void sec_PKCS7DestroyDecryptObject (sec_PKCS7CipherObject *obj);
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extern void sec_PKCS7DestroyEncryptObject (sec_PKCS7CipherObject *obj);
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/*
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* What will be the output length of the next call to encrypt/decrypt?
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* Result can be used to perform memory allocations. Note that the amount
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* is exactly accurate only when not doing a block cipher or when final
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* is false, otherwise it is an upper bound on the amount because until
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* we see the data we do not know how many padding bytes there are
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* (always between 1 and the cipher block size).
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*
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* Note that this can return zero, which does not mean that the cipher
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* operation can be skipped! (It simply means that there are not enough
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* bytes to make up an entire block; the bytes will be reserved until
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* there are enough to encrypt/decrypt at least one block.) However,
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* if zero is returned it *does* mean that no output buffer need be
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* passed in to the subsequent cipher operation, as no output bytes
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* will be stored.
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*/
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extern unsigned int sec_PKCS7DecryptLength (sec_PKCS7CipherObject *obj,
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unsigned int input_len,
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PRBool final);
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extern unsigned int sec_PKCS7EncryptLength (sec_PKCS7CipherObject *obj,
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unsigned int input_len,
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PRBool final);
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/*
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* Decrypt a given length of input buffer (starting at "input" and
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* containing "input_len" bytes), placing the decrypted bytes in
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* "output" and storing the output length in "*output_len_p".
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* "obj" is the return value from sec_PKCS7CreateDecryptObject.
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* When "final" is true, this is the last of the data to be decrypted.
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*/
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extern SECStatus sec_PKCS7Decrypt (sec_PKCS7CipherObject *obj,
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unsigned char *output,
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unsigned int *output_len_p,
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unsigned int max_output_len,
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const unsigned char *input,
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unsigned int input_len,
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PRBool final);
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/*
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* Encrypt a given length of input buffer (starting at "input" and
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* containing "input_len" bytes), placing the encrypted bytes in
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* "output" and storing the output length in "*output_len_p".
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* "obj" is the return value from sec_PKCS7CreateEncryptObject.
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* When "final" is true, this is the last of the data to be encrypted.
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*/
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extern SECStatus sec_PKCS7Encrypt (sec_PKCS7CipherObject *obj,
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unsigned char *output,
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unsigned int *output_len_p,
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unsigned int max_output_len,
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const unsigned char *input,
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unsigned int input_len,
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PRBool final);
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/* return the correct kea template based on the template selector. skipjack
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* does not have the extra IV.
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*/
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const SEC_ASN1Template *
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sec_pkcs7_get_kea_template(SECKEATemplateSelector whichTemplate);
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/************************************************************************/
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SEC_END_PROTOS
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#endif /* _P7LOCAL_H_ */
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