diff options
Diffstat (limited to 'security/nss/lib/pkcs7/p7local.h')
| -rw-r--r-- | security/nss/lib/pkcs7/p7local.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/security/nss/lib/pkcs7/p7local.h b/security/nss/lib/pkcs7/p7local.h new file mode 100644 index 000000000..ad37c3aad --- /dev/null +++ b/security/nss/lib/pkcs7/p7local.h @@ -0,0 +1,137 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * 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! + */ + +#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(PLArenaPool *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(PLArenaPool *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); + +/************************************************************************/ +SEC_END_PROTOS + +#endif /* _P7LOCAL_H_ */ |