swfparse.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:17k
- /*
- * 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.
- */
- /*
- * The following program decodes the FORTEZZA Init File, and stores the result
- * into the fortezza directory.
- */
- #include "secasn1.h"
- #include "swforti.h"
- #include "blapi.h"
- #include "secoid.h"
- #include "secitem.h"
- #include "secder.h"
- /*
- * templates for parsing the FORTEZZA Init File. These were taken from DER
- * definitions on SWF Initialization File Format Version 1.0 pp1-3.
- */
- /* Key info structure... There are up to two of these per slot entry */
- static const SEC_ASN1Template fortKeyInfoTemplate[] = {
- { SEC_ASN1_SEQUENCE,
- 0, NULL, sizeof(fortKeyInformation) },
- { SEC_ASN1_INTEGER,
- offsetof(fortKeyInformation,keyFlags) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortKeyInformation,privateKeyWrappedWithKs) },
- { SEC_ASN1_ANY ,
- offsetof(fortKeyInformation, derPublicKey) },
- { SEC_ASN1_OCTET_STRING, offsetof(fortKeyInformation,p) },
- { SEC_ASN1_OCTET_STRING, offsetof(fortKeyInformation,g) },
- { SEC_ASN1_OCTET_STRING, offsetof(fortKeyInformation,q) },
- { 0 }
- };
- /* This is data that has been wrapped by Ks */
- static const SEC_ASN1Template fortProtDataTemplate[] = {
- { SEC_ASN1_SEQUENCE,
- 0, NULL, sizeof(fortProtectedData) },
- { SEC_ASN1_INTEGER,
- offsetof(fortProtectedData,length) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortProtectedData,dataIV) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortProtectedData,dataEncryptedWithKs) },
- { 0 }
- };
- /* DER to describe each Certificate Slot ... there are an arbitrary number */
- static const SEC_ASN1Template fortSlotEntryTemplate[] = {
- { SEC_ASN1_SEQUENCE,
- 0, NULL, sizeof(fortSlotEntry) },
- { SEC_ASN1_BOOLEAN,
- offsetof(fortSlotEntry,trusted) },
- { SEC_ASN1_INTEGER,
- offsetof(fortSlotEntry,certificateIndex) },
- { SEC_ASN1_INLINE,
- offsetof(fortSlotEntry,certificateLabel), fortProtDataTemplate },
- { SEC_ASN1_INLINE,
- offsetof(fortSlotEntry,certificateData), fortProtDataTemplate },
- { SEC_ASN1_POINTER | SEC_ASN1_OPTIONAL | SEC_ASN1_CONTEXT_SPECIFIC |
- SEC_ASN1_CONSTRUCTED | 0,
- offsetof(fortSlotEntry, exchangeKeyInformation),
- fortKeyInfoTemplate },
- { SEC_ASN1_POINTER | SEC_ASN1_OPTIONAL | SEC_ASN1_CONTEXT_SPECIFIC |
- SEC_ASN1_CONSTRUCTED | 1,
- offsetof(fortSlotEntry, signatureKeyInformation),
- fortKeyInfoTemplate },
- { 0 }
- };
- /* This data is used to check MemPhrases, and to generate Ks
- * each file has two mem phrases, one for SSO, one for User */
- static const SEC_ASN1Template fortProtectedMemPhrase[] = {
- { SEC_ASN1_SEQUENCE,
- 0, NULL, sizeof(fortProtectedPhrase) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortProtectedPhrase,kValueIV) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortProtectedPhrase,wrappedKValue) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortProtectedPhrase,memPhraseIV) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortProtectedPhrase,hashedEncryptedMemPhrase) },
- { 0 }
- };
- /* This data is used to check the Mem Init Phrases, and to generate Kinit
- * each file has one mem init phrase, which is used only in transport of
- * this file */
- static const SEC_ASN1Template fortMemInitPhrase[] = {
- { SEC_ASN1_SEQUENCE,
- 0, NULL, sizeof(fortProtectedPhrase) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortProtectedPhrase,wrappedKValue) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortProtectedPhrase,memPhraseIV) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(fortProtectedPhrase,hashedEncryptedMemPhrase) },
- { 0 }
- };
- static const SEC_ASN1Template fortSlotEntriesTemplate[] = {
- { SEC_ASN1_SEQUENCE_OF, 0, fortSlotEntryTemplate }
- };
- /* This is the complete file with all it's data, but has not been signed
- * yet. */
- static const SEC_ASN1Template fortSwFortezzaInitFileToSign[] = {
- { SEC_ASN1_SEQUENCE,
- 0, NULL, sizeof(FORTSWFile) },
- { SEC_ASN1_INTEGER,
- offsetof(FORTSWFile,version) },
- { SEC_ASN1_ANY,
- offsetof(FORTSWFile,derIssuer) },
- { SEC_ASN1_OCTET_STRING,
- offsetof(FORTSWFile,serialID) },
- { SEC_ASN1_INLINE,
- offsetof(FORTSWFile,initMemPhrase), fortMemInitPhrase },
- { SEC_ASN1_INLINE,
- offsetof(FORTSWFile,ssoMemPhrase), fortProtectedMemPhrase },
- { SEC_ASN1_INLINE,
- offsetof(FORTSWFile,userMemPhrase), fortProtectedMemPhrase },
- { SEC_ASN1_INLINE,
- offsetof(FORTSWFile,ssoPinPhrase), fortProtectedMemPhrase },
- { SEC_ASN1_INLINE,
- offsetof(FORTSWFile,userPinPhrase), fortProtectedMemPhrase },
- { SEC_ASN1_OCTET_STRING,
- offsetof(FORTSWFile,wrappedRandomSeed) },
- { SEC_ASN1_SEQUENCE_OF, offsetof(FORTSWFile,slotEntries),
- fortSlotEntryTemplate },
- /* optional extentions to ignore here... */
- { 0 }
- };
- /* The complete, signed init file */
- static const SEC_ASN1Template fortSwFortezzaInitFile[] = {
- { SEC_ASN1_SEQUENCE,
- 0, NULL, sizeof(FORTSignedSWFile) },
- { SEC_ASN1_SAVE,
- offsetof(FORTSignedSWFile,signatureWrap.data) },
- { SEC_ASN1_INLINE,
- offsetof(FORTSignedSWFile,file),
- fortSwFortezzaInitFileToSign },
- { SEC_ASN1_INLINE,
- offsetof(FORTSignedSWFile,signatureWrap.signatureAlgorithm),
- SECOID_AlgorithmIDTemplate },
- { SEC_ASN1_BIT_STRING,
- offsetof(FORTSignedSWFile,signatureWrap.signature) },
- { 0 }
- };
- FORTSkipjackKeyPtr
- fort_CalculateKMemPhrase(FORTSWFile *file,
- fortProtectedPhrase * prot_phrase, char *phrase, FORTSkipjackKeyPtr wrapKey)
- {
- unsigned char *data = NULL;
- unsigned char hashout[SHA1_LENGTH];
- int data_len = prot_phrase->wrappedKValue.len;
- int ret;
- unsigned int len;
- unsigned int version;
- unsigned char enc_version[2];
- FORTSkipjackKeyPtr Kout = NULL;
- FORTSkipjackKey Kfek;
- SHA1Context *sha;
- data = (unsigned char *) PORT_ZAlloc(data_len);
- if (data == NULL) goto fail;
-
- PORT_Memcpy(data,prot_phrase->wrappedKValue.data,data_len);
- /* if it's a real protected mem phrase, it's been wrapped by kinit, which
- * was passed to us. */
- if (wrapKey) {
- fort_skipjackDecrypt(wrapKey,
- &prot_phrase->kValueIV.data[SKIPJACK_LEAF_SIZE],data_len,
- data,data);
- data_len = sizeof(CI_KEY);
- }
- /* now calculate the PBE key for fortezza */
- sha = SHA1_NewContext();
- if (sha == NULL) goto fail;
- SHA1_Begin(sha);
- version = DER_GetUInteger(&file->version);
- enc_version[0] = (version >> 8) & 0xff;
- enc_version[1] = version & 0xff;
- SHA1_Update(sha,enc_version,sizeof(enc_version));
- SHA1_Update(sha,file->derIssuer.data, file->derIssuer.len);
- SHA1_Update(sha,file->serialID.data, file->serialID.len);
- SHA1_Update(sha,(unsigned char *)phrase,strlen(phrase));
- SHA1_End(sha,hashout,&len,SHA1_LENGTH);
- SHA1_DestroyContext(sha, PR_TRUE);
- PORT_Memcpy(Kfek,hashout,sizeof(FORTSkipjackKey));
- /* now use that key to unwrap */
- Kout = (FORTSkipjackKeyPtr) PORT_Alloc(sizeof(FORTSkipjackKey));
- ret = fort_skipjackUnwrap(Kfek,data_len,data,Kout);
- if (ret != CI_OK) {
- PORT_Free(Kout);
- Kout = NULL;
- }
- fail:
- PORT_Memset(&Kfek, 0, sizeof(FORTSkipjackKey));
- if (data) PORT_ZFree(data,data_len);
- return Kout;
- }
- PRBool
- fort_CheckMemPhrase(FORTSWFile *file,
- fortProtectedPhrase * prot_phrase, char *phrase, FORTSkipjackKeyPtr wrapKey)
- {
- unsigned char *data = NULL;
- unsigned char hashout[SHA1_LENGTH];
- int data_len = prot_phrase->hashedEncryptedMemPhrase.len;
- unsigned int len;
- SHA1Context *sha;
- PRBool pinOK = PR_FALSE;
- unsigned char cw[4];
- int i;
- /* first, decrypt the hashed/Encrypted Memphrase */
- data = (unsigned char *) PORT_ZAlloc(data_len);
- if (data == NULL) goto failed;
- PORT_Memcpy(data,prot_phrase->hashedEncryptedMemPhrase.data,data_len);
- fort_skipjackDecrypt(wrapKey,
- &prot_phrase->memPhraseIV.data[SKIPJACK_LEAF_SIZE],data_len,
- data,data);
- /* now build the hash for comparisons */
- sha = SHA1_NewContext();
- if (sha == NULL) goto failed;
- SHA1_Begin(sha);
- SHA1_Update(sha,(unsigned char *)phrase,strlen(phrase));
- SHA1_End(sha,hashout,&len,SHA1_LENGTH);
- SHA1_DestroyContext(sha, PR_TRUE);
- /* hashes don't match... must not be the right pass mem */
- if (PORT_Memcmp(data,hashout,len) != 0) goto failed;
- /* now calcuate the checkword and compare it */
- cw[0] = cw[1] = cw[2] = cw[3] = 0;
- for (i=0; i <5 ; i++) {
- cw[0] = cw[0] ^ hashout[i*4];
- cw[1] = cw[1] ^ hashout[i*4+1];
- cw[2] = cw[2] ^ hashout[i*4+2];
- cw[3] = cw[3] ^ hashout[i*4+3];
- }
- /* checkword doesn't match, must not be the right pass mem */
- if (PORT_Memcmp(data+len,cw,4) != 0) goto failed;
- /* pased all our test, its OK */
- pinOK = PR_TRUE;
- failed:
- PORT_Free(data);
- return pinOK;
- }
- /*
- * walk through the list of memphrases. This function allows us to use a
- * for loop to walk down them.
- */
- fortProtectedPhrase *
- fort_getNextPhrase( FORTSWFile *file, fortProtectedPhrase *last)
- {
- if (last == &file->userMemPhrase) {
- return &file->userPinPhrase;
- }
- /* we can add more test here if we want to support SSO mode someday. */
- return NULL;
- }
- /*
- * decode the DER file data into our nice data structures, including turning
- * cert indexes into integers.
- */
- FORTSignedSWFile *
- FORT_GetSWFile(SECItem *initBits)
- {
- FORTSignedSWFile *sw_init_file;
- PRArenaPool *arena = NULL;
- SECStatus rv;
- int i, count;
- /* get the local arena... be sure to free this at the end */
- /* get the local arena... be sure to free this at the end */
- arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
- if (arena == NULL) goto fail;
- sw_init_file = (FORTSignedSWFile *)
- PORT_ArenaZAlloc(arena,sizeof(FORTSignedSWFile));
- if (sw_init_file == NULL) goto fail;
- /* ANS1 decode the complete init file */
- rv = SEC_ASN1DecodeItem(arena,sw_init_file,fortSwFortezzaInitFile,initBits);
- if (rv != SECSuccess) {
- goto fail;
- }
- /* count the certs */
- count = 0;
- while (sw_init_file->file.slotEntries[count]) count++;
- for (i=0; i < count; i++) {
- /* update the cert Index Pointers */
- sw_init_file->file.slotEntries[i]->certIndex =
- DER_GetInteger(&sw_init_file->
- file.slotEntries[i]->certificateIndex );
- }
- /* now start checking the mem phrases and pins, as well as calculating the
- * file's 'K' values. First we start with K(init). */
- sw_init_file->file.arena = arena;
- return sw_init_file;
- /* OK now that we've read in the init file, and now have Kinit, Ks, and the
- * appropriate Pin Phrase, we need to build our database file. */
-
- fail:
- if (arena) PORT_FreeArena(arena,PR_TRUE);
- return NULL;
- }
- /*
- * Check the init memphrases and the user mem phrases. Remove all the init
- * memphrase wrappings. Save the Kinit and Ks values for use.
- */
- SECStatus
- FORT_CheckInitPhrase(FORTSignedSWFile *sw_init_file, char *initMemPhrase)
- {
- SECStatus rv = SECFailure;
- sw_init_file->Kinit = fort_CalculateKMemPhrase(&sw_init_file->file,
- &sw_init_file->file.initMemPhrase, initMemPhrase, NULL);
- if (sw_init_file->Kinit == NULL) goto fail;
- /* now check the init Mem phrase */
- if (!fort_CheckMemPhrase(&sw_init_file->file,
- &sw_init_file->file.initMemPhrase,
- initMemPhrase, sw_init_file->Kinit)) {
- goto fail;
- }
- rv = SECSuccess;
- fail:
- return rv;
- }
- /* now check user user mem phrase and calculate Ks */
- SECStatus
- FORT_CheckUserPhrase(FORTSignedSWFile *sw_init_file, char *userMemPhrase)
- {
- SECStatus rv = SECFailure;
- char tmp_data[13];
- char *padMemPhrase = NULL;
- fortProtectedPhrase *phrase_store;
- if (strlen(userMemPhrase) < 12) {
- PORT_Memset(tmp_data, ' ', sizeof(tmp_data));
- PORT_Memcpy(tmp_data,userMemPhrase,strlen(userMemPhrase));
- tmp_data[12] = 0;
- padMemPhrase = tmp_data;
- }
- for (phrase_store = &sw_init_file->file.userMemPhrase; phrase_store;
- phrase_store = fort_getNextPhrase(&sw_init_file->file,phrase_store)) {
- sw_init_file->Ks = fort_CalculateKMemPhrase(&sw_init_file->file,
- phrase_store, userMemPhrase, sw_init_file->Kinit);
-
- if ((sw_init_file->Ks == NULL) && (padMemPhrase != NULL)) {
- sw_init_file->Ks = fort_CalculateKMemPhrase(&sw_init_file->file,
- phrase_store, padMemPhrase, sw_init_file->Kinit);
- userMemPhrase = padMemPhrase;
- }
- if (sw_init_file->Ks == NULL) {
- continue;
- }
- /* now check the User Mem phrase */
- if (fort_CheckMemPhrase(&sw_init_file->file, phrase_store,
- userMemPhrase, sw_init_file->Ks)) {
- break;
- }
- PORT_Free(sw_init_file->Ks);
- sw_init_file->Ks = NULL;
- }
- if (phrase_store == NULL) goto fail;
- /* strip the Kinit wrapping */
- fort_skipjackDecrypt(sw_init_file->Kinit,
- &phrase_store->kValueIV.data[SKIPJACK_LEAF_SIZE],
- phrase_store->wrappedKValue.len, phrase_store->wrappedKValue.data,
- phrase_store->wrappedKValue.data);
- phrase_store->wrappedKValue.len = 12;
- PORT_Memset(phrase_store->kValueIV.data,0,phrase_store->kValueIV.len);
- sw_init_file->file.initMemPhrase = *phrase_store;
- sw_init_file->file.ssoMemPhrase = *phrase_store;
- sw_init_file->file.ssoPinPhrase = *phrase_store;
- sw_init_file->file.userMemPhrase = *phrase_store;
- sw_init_file->file.userPinPhrase = *phrase_store;
- rv = SECSuccess;
-
- fail:
- /* don't keep the pin around */
- PORT_Memset(tmp_data, 0, sizeof(tmp_data));
- return rv;
- }
- void
- FORT_DestroySWFile(FORTSWFile *file)
- {
- PORT_FreeArena(file->arena,PR_FALSE);
- }
- void
- FORT_DestroySignedSWFile(FORTSignedSWFile *swfile)
- {
- FORT_DestroySWFile(&swfile->file);
- }
- SECItem *
- FORT_GetDERCert(FORTSignedSWFile *swfile,int index)
- {
- SECItem *newItem = NULL;
- unsigned char *cert = NULL;
- int len,ret;
- fortSlotEntry *certEntry = NULL;
-
- newItem = PORT_ZNew(SECItem);
- if (newItem == NULL) return NULL;
- certEntry = fort_GetCertEntry(&swfile->file,index);
- if (certEntry == NULL) {
- PORT_Free(newItem);
- return NULL;
- }
- newItem->len = len = certEntry->certificateData.dataEncryptedWithKs.len;
- newItem->data = cert = PORT_ZAlloc(len);
- if (cert == NULL) {
- PORT_Free(newItem);
- return NULL;
- }
- newItem->len = DER_GetUInteger(&certEntry->certificateData.length);
-
- PORT_Memcpy(cert, certEntry->certificateData.dataEncryptedWithKs.data,len);
- /* Ks is always stored in keyReg[0] when we log in */
- ret = fort_skipjackDecrypt(swfile->Ks,
- &certEntry->certificateData.dataIV.data[SKIPJACK_LEAF_SIZE],
- len,cert,cert);
- if (ret != CI_OK) {
- SECITEM_FreeItem(newItem,PR_TRUE);
- return NULL;
- }
- return newItem;
- }
- /*
- * decode the DER file data into our nice data structures, including turning
- * cert indexes into integers.
- */
- SECItem *
- FORT_PutSWFile(FORTSignedSWFile *sw_init_file)
- {
- SECItem *outBits, *tmpBits;
- PRArenaPool *arena = NULL;
- /* get the local arena... be sure to free this at the end */
- /* arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); */
- /* if (arena == NULL) goto fail; */
- /*outBits = (SECItem *) PORT_ArenaZAlloc(arena,sizeof(SECItem)); */
- outBits = PORT_ZNew(SECItem);
- if (outBits == NULL) goto fail;
- /* ANS1 encode the complete init file */
- tmpBits = SEC_ASN1EncodeItem(NULL,outBits,sw_init_file,fortSwFortezzaInitFile);
- if (tmpBits == NULL) {
- goto fail;
- }
- return outBits;
-
- fail:
- if (outBits) SECITEM_FreeItem(outBits,PR_TRUE);
- return NULL;
- }