1/*
2 * The contents of this file are subject to the Mozilla Public
3 * License Version 1.1 (the "License"); you may not use this file
4 * except in compliance with the License. You may obtain a copy of
5 * the License at http://www.mozilla.org/MPL/
6 *
7 * Software distributed under the License is distributed on an "AS
8 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
9 * implied. See the License for the specific language governing
10 * rights and limitations under the License.
11 *
12 * The Original Code is the Netscape security libraries.
13 *
14 * The Initial Developer of the Original Code is Netscape
15 * Communications Corporation.  Portions created by Netscape are
16 * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
17 * Rights Reserved.
18 *
19 * Contributor(s):
20 *
21 * Alternatively, the contents of this file may be used under the
22 * terms of the GNU General Public License Version 2 or later (the
23 * "GPL"), in which case the provisions of the GPL are applicable
24 * instead of those above.  If you wish to allow use of your
25 * version of this file only under the terms of the GPL and not to
26 * allow others to use your version of this file under the MPL,
27 * indicate your decision by deleting the provisions above and
28 * replace them with the notice and other provisions required by
29 * the GPL.  If you do not delete the provisions above, a recipient
30 * may use your version of this file under either the MPL or the
31 * GPL.
32 */
33
34#include "secoid.h"
35#include "SecAsn1Item.h"
36#include <security_asn1/secasn1.h>
37#include <security_asn1/secerr.h>
38#include <security_asn1/secport.h>
39
40const SecAsn1Template SECOID_AlgorithmIDTemplate[] = {
41    { SEC_ASN1_SEQUENCE,
42	  0, NULL, sizeof(SECAlgorithmID) },
43    { SEC_ASN1_OBJECT_ID,
44	  offsetof(SECAlgorithmID,algorithm), },
45    { SEC_ASN1_OPTIONAL | SEC_ASN1_ANY,
46	  offsetof(SECAlgorithmID,parameters), },
47    { 0 }
48};
49
50SECOidTag
51SECOID_GetAlgorithmTag(const SECAlgorithmID *id)
52{
53    if (id == NULL || id->algorithm.Data == NULL)
54		return SEC_OID_UNKNOWN;
55
56    return SECOID_FindOIDTag (&(id->algorithm));
57}
58
59SECStatus
60SECOID_SetAlgorithmID(PRArenaPool *arena, SECAlgorithmID *id, SECOidTag which,
61		      const SecAsn1Item *params)
62{
63    SECOidData *oiddata;
64    Boolean add_null_param;
65
66    oiddata = SECOID_FindOIDByTag(which);
67    if ( !oiddata )
68	{
69		PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
70		return SECFailure;
71    }
72
73    if (SECITEM_CopyItem(arena, &id->algorithm, &oiddata->oid))
74		return SECFailure;
75
76    switch (which)
77	{
78	case SEC_OID_MD2:
79	case SEC_OID_MD4:
80	case SEC_OID_MD5:
81	case SEC_OID_SHA1:
82	case SEC_OID_SHA256:
83	case SEC_OID_SHA384:
84	case SEC_OID_SHA512:
85	case SEC_OID_PKCS1_RSA_ENCRYPTION:
86	case SEC_OID_PKCS1_MD2_WITH_RSA_ENCRYPTION:
87	case SEC_OID_PKCS1_MD4_WITH_RSA_ENCRYPTION:
88	case SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION:
89	case SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION:
90	case SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION:
91	case SEC_OID_PKCS1_SHA384_WITH_RSA_ENCRYPTION:
92	case SEC_OID_PKCS1_SHA512_WITH_RSA_ENCRYPTION:
93		add_null_param = PR_TRUE;
94		break;
95	default:
96		add_null_param = PR_FALSE;
97		break;
98    }
99
100    if (params) {
101		/*
102		* I am specifically *not* enforcing the following assertion
103		* (by following it up with an error and a return of failure)
104		* because I do not want to introduce any change in the current
105		* behavior.  But I do want for us to notice if the following is
106		* ever true, because I do not think it should be so and probably
107		* signifies an error/bug somewhere.
108		*/
109		PORT_Assert(!add_null_param || (params->Length == 2
110					&& params->Data[0] == SEC_ASN1_NULL
111					&& params->Data[1] == 0));
112		if (SECITEM_CopyItem(arena, &id->parameters, params)) {
113			return SECFailure;
114		}
115    } else {
116		/*
117		* Again, this is not considered an error.  But if we assume
118		* that nobody tries to set the parameters field themselves
119		* (but always uses this routine to do that), then we should
120		* not hit the following assertion.  Unless they forgot to zero
121		* the structure, which could also be a bad (and wrong) thing.
122		*/
123		PORT_Assert(id->parameters.Data == NULL);
124
125		if (add_null_param) {
126			(void) SECITEM_AllocItem(arena, &id->parameters, 2);
127			if (id->parameters.Data == NULL) {
128				return SECFailure;
129			}
130			id->parameters.Data[0] = SEC_ASN1_NULL;
131			id->parameters.Data[1] = 0;
132		}
133    }
134
135    return SECSuccess;
136}
137
138SECStatus
139SECOID_CopyAlgorithmID(PRArenaPool *arena, SECAlgorithmID *to, const SECAlgorithmID *from)
140{
141    SECStatus rv;
142
143    rv = SECITEM_CopyItem(arena, &to->algorithm, &from->algorithm);
144    if (rv) return rv;
145	rv = SECITEM_CopyItem(arena, &to->parameters, &from->parameters);
146    return rv;
147}
148
149void SECOID_DestroyAlgorithmID(SECAlgorithmID *algid, Boolean freeit)
150{
151    SECITEM_FreeItem(&algid->parameters, PR_FALSE);
152    SECITEM_FreeItem(&algid->algorithm, PR_FALSE);
153    if(freeit == PR_TRUE)
154		PORT_Free(algid);
155}
156
157SECComparison
158SECOID_CompareAlgorithmID(const SECAlgorithmID *a, const SECAlgorithmID *b)
159{
160    SECComparison rv;
161
162    rv = SECITEM_CompareItem(&a->algorithm, &b->algorithm);
163    if (rv) return rv;
164    rv = SECITEM_CompareItem(&a->parameters, &b->parameters);
165    return rv;
166}
167
168/* This functions simply returns the address of the above-declared template. */
169SEC_ASN1_CHOOSER_IMPLEMENT(SECOID_AlgorithmIDTemplate)
170
171