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  
 40  const 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  
 50  SECOidTag
 51  SECOID_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  
 59  SECStatus
 60  SECOID_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  
138  SECStatus
139  SECOID_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  
149  void 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  
157  SECComparison
158  SECOID_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. */
169  SEC_ASN1_CHOOSER_IMPLEMENT(SECOID_AlgorithmIDTemplate)
170