p7local.h
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上传日期:2007-01-12
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- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- /*
- * Support routines for PKCS7 implementation, none of which are exported.
- * This file should only contain things that are needed by both the
- * encoding/creation side *and* the decoding/decryption side. Anything
- * else should just be static routines in the appropriate file.
- *
- * Do not export this file! If something in here is really needed outside
- * of pkcs7 code, first try to add a PKCS7 interface which will do it for
- * you. If that has a problem, then just move out what you need, changing
- * its name as appropriate!
- *
- * $Id: p7local.h,v 1.1 2000/03/31 19:16:07 relyea%netscape.com Exp $
- */
- #ifndef _P7LOCAL_H_
- #define _P7LOCAL_H_
- #include "secpkcs7.h"
- #include "secasn1t.h"
- extern const SEC_ASN1Template sec_PKCS7ContentInfoTemplate[];
- /* opaque objects */
- typedef struct sec_pkcs7_cipher_object sec_PKCS7CipherObject;
- /************************************************************************/
- SEC_BEGIN_PROTOS
- /*
- * Look through a set of attributes and find one that matches the
- * specified object ID. If "only" is true, then make sure that
- * there is not more than one attribute of the same type. Otherwise,
- * just return the first one found. (XXX Does anybody really want
- * that first-found behavior? It was like that when I found it...)
- */
- extern SEC_PKCS7Attribute *sec_PKCS7FindAttribute (SEC_PKCS7Attribute **attrs,
- SECOidTag oidtag,
- PRBool only);
- /*
- * Return the single attribute value, doing some sanity checking first:
- * - Multiple values are *not* expected.
- * - Empty values are *not* expected.
- */
- extern SECItem *sec_PKCS7AttributeValue (SEC_PKCS7Attribute *attr);
- /*
- * Encode a set of attributes (found in "src").
- */
- extern SECItem *sec_PKCS7EncodeAttributes (PRArenaPool *poolp,
- SECItem *dest, void *src);
- /*
- * Make sure that the order of the attributes guarantees valid DER
- * (which must be in lexigraphically ascending order for a SET OF);
- * if reordering is necessary it will be done in place (in attrs).
- */
- extern SECStatus sec_PKCS7ReorderAttributes (SEC_PKCS7Attribute **attrs);
- /*
- * Create a context for decrypting, based on the given key and algorithm.
- */
- extern sec_PKCS7CipherObject *
- sec_PKCS7CreateDecryptObject (PK11SymKey *key, SECAlgorithmID *algid);
- /*
- * Create a context for encrypting, based on the given key and algorithm,
- * and fill in the algorithm id.
- */
- extern sec_PKCS7CipherObject *
- sec_PKCS7CreateEncryptObject (PRArenaPool *poolp, PK11SymKey *key,
- SECOidTag algtag, SECAlgorithmID *algid);
- /*
- * Destroy the given decryption or encryption object.
- */
- extern void sec_PKCS7DestroyDecryptObject (sec_PKCS7CipherObject *obj);
- extern void sec_PKCS7DestroyEncryptObject (sec_PKCS7CipherObject *obj);
- /*
- * What will be the output length of the next call to encrypt/decrypt?
- * Result can be used to perform memory allocations. Note that the amount
- * is exactly accurate only when not doing a block cipher or when final
- * is false, otherwise it is an upper bound on the amount because until
- * we see the data we do not know how many padding bytes there are
- * (always between 1 and the cipher block size).
- *
- * Note that this can return zero, which does not mean that the cipher
- * operation can be skipped! (It simply means that there are not enough
- * bytes to make up an entire block; the bytes will be reserved until
- * there are enough to encrypt/decrypt at least one block.) However,
- * if zero is returned it *does* mean that no output buffer need be
- * passed in to the subsequent cipher operation, as no output bytes
- * will be stored.
- */
- extern unsigned int sec_PKCS7DecryptLength (sec_PKCS7CipherObject *obj,
- unsigned int input_len,
- PRBool final);
- extern unsigned int sec_PKCS7EncryptLength (sec_PKCS7CipherObject *obj,
- unsigned int input_len,
- PRBool final);
- /*
- * Decrypt a given length of input buffer (starting at "input" and
- * containing "input_len" bytes), placing the decrypted bytes in
- * "output" and storing the output length in "*output_len_p".
- * "obj" is the return value from sec_PKCS7CreateDecryptObject.
- * When "final" is true, this is the last of the data to be decrypted.
- */
- extern SECStatus sec_PKCS7Decrypt (sec_PKCS7CipherObject *obj,
- unsigned char *output,
- unsigned int *output_len_p,
- unsigned int max_output_len,
- const unsigned char *input,
- unsigned int input_len,
- PRBool final);
- /*
- * Encrypt a given length of input buffer (starting at "input" and
- * containing "input_len" bytes), placing the encrypted bytes in
- * "output" and storing the output length in "*output_len_p".
- * "obj" is the return value from sec_PKCS7CreateEncryptObject.
- * When "final" is true, this is the last of the data to be encrypted.
- */
- extern SECStatus sec_PKCS7Encrypt (sec_PKCS7CipherObject *obj,
- unsigned char *output,
- unsigned int *output_len_p,
- unsigned int max_output_len,
- const unsigned char *input,
- unsigned int input_len,
- PRBool final);
- /* return the correct kea template based on the template selector. skipjack
- * does not have the extra IV.
- */
- const SEC_ASN1Template *
- sec_pkcs7_get_kea_template(SECKEATemplateSelector whichTemplate);
- /************************************************************************/
- SEC_END_PROTOS
- #endif /* _P7LOCAL_H_ */