DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (d1ed7de67f5a)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242
/* -*- Mode: C; tab-width: 8 -*-*/
/* 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/. */

#include "cmmf.h"
#include "cmmfi.h"
#include "secitem.h"
#include "pk11func.h"
#include "secder.h"
#include "sechash.h"

CMMFPOPODecKeyChallContent*
CMMF_CreatePOPODecKeyChallContentFromDER(const char *buf, long len)
{
    PLArenaPool                *poolp;
    CMMFPOPODecKeyChallContent *challContent;
    SECStatus                   rv;

    poolp = PORT_NewArena(CRMF_DEFAULT_ARENA_SIZE);
    if (poolp == NULL) {
        return NULL;
    }
    challContent = PORT_ArenaZNew(poolp, CMMFPOPODecKeyChallContent);
    if (challContent == NULL) {
        goto loser;
    }
    challContent->poolp = poolp;
    rv = SEC_ASN1Decode(poolp, challContent, 
			CMMFPOPODecKeyChallContentTemplate, buf, len);
    if (rv != SECSuccess) {
        goto loser;
    }
    if (challContent->challenges) {
      while (challContent->challenges[challContent->numChallenges] != NULL) {
	  challContent->numChallenges++;
      }
      challContent->numAllocated = challContent->numChallenges;
    }
    return challContent;
 loser:
    if (poolp != NULL) {
        PORT_FreeArena(poolp, PR_FALSE);
    }
    return NULL;
}

int
CMMF_POPODecKeyChallContentGetNumChallenges 
                              (CMMFPOPODecKeyChallContent *inKeyChallCont)
{
    PORT_Assert(inKeyChallCont != NULL);
    if (inKeyChallCont == NULL) {
        return 0;
    }
    return inKeyChallCont->numChallenges;
}

SECItem* 
CMMF_POPODecKeyChallContentGetPublicValue
                                   (CMMFPOPODecKeyChallContent *inKeyChallCont,
				    int                         inIndex)
{
    PORT_Assert(inKeyChallCont != NULL);
    if (inKeyChallCont == NULL || (inIndex > inKeyChallCont->numChallenges-1)||
	inIndex < 0) {
        return NULL;
    }
    return SECITEM_DupItem(&inKeyChallCont->challenges[inIndex]->key);
}

static SECAlgorithmID*
cmmf_get_owf(CMMFPOPODecKeyChallContent *inChalCont, 
	     int                         inIndex)
{
   int i;
   
   for (i=inIndex; i >= 0; i--) {
       if (inChalCont->challenges[i]->owf != NULL) {
	   return inChalCont->challenges[i]->owf;
       }
   }
   return NULL;
}

SECStatus 
CMMF_POPODecKeyChallContDecryptChallenge(CMMFPOPODecKeyChallContent *inChalCont,
					 int                         inIndex,
					 SECKEYPrivateKey           *inPrivKey)
{
    CMMFChallenge  *challenge;
    SECItem        *decryptedRand=NULL;
    PLArenaPool    *poolp  = NULL;
    SECAlgorithmID *owf;
    SECStatus       rv     = SECFailure;
    SECOidTag       tag;
    CMMFRand        randStr;
    SECItem         hashItem;
    unsigned char   hash[HASH_LENGTH_MAX]; 

    PORT_Assert(inChalCont != NULL && inPrivKey != NULL);
    if (inChalCont == NULL || inIndex <0 || inIndex > inChalCont->numChallenges
	|| inPrivKey == NULL){
        return SECFailure;
    }

    poolp = PORT_NewArena(CRMF_DEFAULT_ARENA_SIZE);
    if (poolp == NULL) {
        goto loser;
    }

    challenge = inChalCont->challenges[inIndex];
    decryptedRand = SECITEM_AllocItem(poolp, NULL, challenge->challenge.len);
    if (decryptedRand == NULL) {
        goto loser;
    }
    rv = PK11_PrivDecryptPKCS1(inPrivKey, decryptedRand->data, 
    			&decryptedRand->len, decryptedRand->len, 
			challenge->challenge.data, challenge->challenge.len);
    if (rv != SECSuccess) {
        goto loser;
    }

    rv = SEC_ASN1DecodeItem(poolp, &randStr, CMMFRandTemplate,
			    decryptedRand); 
    if (rv != SECSuccess) {
        goto loser;
    }
    rv = SECFailure; /* Just so that when we do go to loser,
		      * I won't have to set it again.
		      */
    owf = cmmf_get_owf(inChalCont, inIndex);
    if (owf == NULL) {
        /* No hashing algorithm came with the challenges.  Can't verify */
        goto loser;
    }
    /* Verify the hashes in the challenge */
    tag = SECOID_FindOIDTag(&owf->algorithm);
    hashItem.len = HASH_ResultLenByOidTag(tag);
    if (!hashItem.len)
        goto loser;	/* error code has been set */

    rv = PK11_HashBuf(tag, hash, randStr.integer.data, randStr.integer.len);
    if (rv != SECSuccess) {
        goto loser;
    }
    hashItem.data = hash;
    if (SECITEM_CompareItem(&hashItem, &challenge->witness) != SECEqual) {
        /* The hash for the data we decrypted doesn't match the hash provided
	 * in the challenge.  Bail out.
	 */
	PORT_SetError(SEC_ERROR_BAD_DATA);
        rv = SECFailure;
	goto loser;
    }
    rv = PK11_HashBuf(tag, hash, challenge->senderDER.data, 
		      challenge->senderDER.len);
    if (rv != SECSuccess) {
        goto loser;
    }
    if (SECITEM_CompareItem(&hashItem, &randStr.senderHash) != SECEqual) {
        /* The hash for the data we decrypted doesn't match the hash provided
	 * in the challenge.  Bail out.
	 */
	PORT_SetError(SEC_ERROR_BAD_DATA);
        rv = SECFailure;
	goto loser;
    }
    /* All of the hashes have verified, so we can now store the integer away.*/
    rv = SECITEM_CopyItem(inChalCont->poolp, &challenge->randomNumber,
			  &randStr.integer);
 loser:
    if (poolp) {
    	PORT_FreeArena(poolp, PR_FALSE);
    }
    return rv;
}

SECStatus
CMMF_POPODecKeyChallContentGetRandomNumber
                                   (CMMFPOPODecKeyChallContent *inKeyChallCont,
				    int                          inIndex,
				    long                        *inDest)
{
    CMMFChallenge *challenge;
    
    PORT_Assert(inKeyChallCont != NULL);
    if (inKeyChallCont == NULL || inIndex > 0 || inIndex >= 
	inKeyChallCont->numChallenges) {
        return SECFailure;
    }
    challenge = inKeyChallCont->challenges[inIndex];
    if (challenge->randomNumber.data == NULL) {
        /* There is no random number here, nothing to see. */
        return SECFailure;
    }
    *inDest = DER_GetInteger(&challenge->randomNumber);
    return (*inDest == -1) ? SECFailure : SECSuccess;
}

SECStatus 
CMMF_EncodePOPODecKeyRespContent(long                     *inDecodedRand,
				 int                       inNumRand,
				 CRMFEncoderOutputCallback inCallback,
				 void                     *inArg)
{
    PLArenaPool *poolp;
    CMMFPOPODecKeyRespContent *response;
    SECItem *currItem;
    SECStatus rv=SECFailure;
    int i;

    poolp = PORT_NewArena(CRMF_DEFAULT_ARENA_SIZE);
    if (poolp == NULL) {
        return SECFailure;
    }
    response = PORT_ArenaZNew(poolp, CMMFPOPODecKeyRespContent);
    if (response == NULL) {
        goto loser;
    }
    response->responses = PORT_ArenaZNewArray(poolp, SECItem*, inNumRand+1);
    if (response->responses == NULL) {
        goto loser;
    }
    for (i=0; i<inNumRand; i++) {
        currItem = response->responses[i] = PORT_ArenaZNew(poolp,SECItem);
	if (currItem == NULL) {
	    goto loser;
	}
	currItem = SEC_ASN1EncodeInteger(poolp, currItem, inDecodedRand[i]);
	if (currItem == NULL) {
	    goto loser;
	}
    }
    rv = cmmf_user_encode(response, inCallback, inArg,
			  CMMFPOPODecKeyRespContentTemplate);
 loser:
    if (poolp != NULL) {
        PORT_FreeArena(poolp, PR_FALSE);
    }
    return rv;
}