/* 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 "p12t.h"
#include "p12.h"
#include "plarena.h"
#include "secitem.h"
#include "secoid.h"
#include "seccomon.h"
#include "secport.h"
#include "cert.h"
#include "secpkcs5.h"
#include "secpkcs7.h"
#include "secasn1.h"
#include "secerr.h"
#include "pk11func.h"
#include "p12plcy.h"
#include "p12local.h"
#include "prcpucfg.h"
extern const int NSS_PBE_DEFAULT_ITERATION_COUNT; /* defined in p7create.c */
/*
** This PKCS12 file encoder uses numerous nested ASN.1 and PKCS7 encoder
** contexts. It can be difficult to keep straight. Here's a picture:
**
** "outer" ASN.1 encoder. The output goes to the library caller's CB.
** "middle" PKCS7 encoder. Feeds the "outer" ASN.1 encoder.
** "middle" ASN1 encoder. Encodes the encrypted aSafes.
** Feeds the "middle" P7 encoder above.
** "inner" PKCS7 encoder. Encrypts the "authenticated Safes" (aSafes)
** Feeds the "middle" ASN.1 encoder above.
** "inner" ASN.1 encoder. Encodes the unencrypted aSafes.
** Feeds the "inner" P7 enocder above.
**
** Buffering has been added at each point where the output of an ASN.1
** encoder feeds the input of a PKCS7 encoder.
*/
/*********************************
* Output buffer object, used to buffer output from ASN.1 encoder
* before passing data on down to the next PKCS7 encoder.
*********************************/
#define PK12_OUTPUT_BUFFER_SIZE 8192
struct sec_pkcs12OutputBufferStr {
SEC_PKCS7EncoderContext *p7eCx;
PK11Context *hmacCx;
unsigned int numBytes;
unsigned int bufBytes;
char buf[PK12_OUTPUT_BUFFER_SIZE];
};
typedef struct sec_pkcs12OutputBufferStr sec_pkcs12OutputBuffer;
/*********************************
* Structures used in exporting the PKCS 12 blob
*********************************/
/* A SafeInfo is used for each ContentInfo which makes up the
* sequence of safes in the AuthenticatedSafe portion of the
* PFX structure.
*/
struct SEC_PKCS12SafeInfoStr {
PLArenaPool *arena;
/* information for setting up password encryption */
SECItem pwitem;
SECOidTag algorithm;
PK11SymKey *encryptionKey;
/* how many items have been stored in this safe,
* we will skip any safe which does not contain any
* items
*/
unsigned int itemCount;
/* the content info for the safe */
SEC_PKCS7ContentInfo *cinfo;
sec_PKCS12SafeContents *safe;
};
/* An opaque structure which contains information needed for exporting
* certificates and keys through PKCS 12.
*/
struct SEC_PKCS12ExportContextStr {
PLArenaPool *arena;
PK11SlotInfo *slot;
void *wincx;
/* integrity information */
PRBool integrityEnabled;
PRBool pwdIntegrity;
union {
struct sec_PKCS12PasswordModeInfo pwdInfo;
struct sec_PKCS12PublicKeyModeInfo pubkeyInfo;
} integrityInfo;
/* helper functions */
/* retrieve the password call back */
SECKEYGetPasswordKey pwfn;
void *pwfnarg;
/* safe contents bags */
SEC_PKCS12SafeInfo **safeInfos;
unsigned int safeInfoCount;
/* the sequence of safes */
sec_PKCS12AuthenticatedSafe authSafe;
/* information needing deletion */
CERTCertificate **certList;
};
/* structures for passing information to encoder callbacks when processing
* data through the ASN1 engine.
*/
struct sec_pkcs12_encoder_output {
SEC_PKCS12EncoderOutputCallback outputfn;
void *outputarg;
};
struct sec_pkcs12_hmac_and_output_info {
void *arg;
struct sec_pkcs12_encoder_output output;
};
/* An encoder context which is used for the actual encoding
* portion of PKCS 12.
*/
typedef struct sec_PKCS12EncoderContextStr {
PLArenaPool *arena;
SEC_PKCS12ExportContext *p12exp;
/* encoder information - this is set up based on whether
* password based or public key pased privacy is being used
*/
SEC_ASN1EncoderContext *outerA1ecx;
union {
struct sec_pkcs12_hmac_and_output_info hmacAndOutputInfo;
struct sec_pkcs12_encoder_output encOutput;
} output;
/* structures for encoding of PFX and MAC */
sec_PKCS12PFXItem pfx;
sec_PKCS12MacData mac;
/* authenticated safe encoding tracking information */
SEC_PKCS7ContentInfo *aSafeCinfo;
SEC_PKCS7EncoderContext *middleP7ecx;
SEC_ASN1EncoderContext *middleA1ecx;
unsigned int currentSafe;
/* hmac context */
PK11Context *hmacCx;
/* output buffers */
sec_pkcs12OutputBuffer middleBuf;
sec_pkcs12OutputBuffer innerBuf;
} sec_PKCS12EncoderContext;
/*********************************
* Export setup routines
*********************************/
/* SEC_PKCS12CreateExportContext
* Creates an export context and sets the unicode and password retrieval
* callbacks. This is the first call which must be made when exporting
* a PKCS 12 blob.
*
* pwfn, pwfnarg - password retrieval callback and argument. these are
* required for password-authentication mode.
*/
SEC_PKCS12ExportContext *
SEC_PKCS12CreateExportContext(SECKEYGetPasswordKey pwfn, void *pwfnarg,
PK11SlotInfo *slot, void *wincx)
{
PLArenaPool *arena = NULL;
SEC_PKCS12ExportContext *p12ctxt = NULL;
/* allocate the arena and create the context */
arena = PORT_NewArena(4096);
if (!arena) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
p12ctxt = (SEC_PKCS12ExportContext *)PORT_ArenaZAlloc(arena,
sizeof(SEC_PKCS12ExportContext));
if (!p12ctxt) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* password callback for key retrieval */
p12ctxt->pwfn = pwfn;
p12ctxt->pwfnarg = pwfnarg;
p12ctxt->integrityEnabled = PR_FALSE;
p12ctxt->arena = arena;
p12ctxt->wincx = wincx;
p12ctxt->slot = (slot) ? PK11_ReferenceSlot(slot) : PK11_GetInternalSlot();
return p12ctxt;
loser:
if (arena) {
PORT_FreeArena(arena, PR_TRUE);
}
return NULL;
}
/*
* Adding integrity mode
*/
/* SEC_PKCS12AddPasswordIntegrity
* Add password integrity to the exported data. If an integrity method
* has already been set, then return an error.
*
* p12ctxt - the export context
* pwitem - the password for integrity mode
* integAlg - the integrity algorithm to use for authentication.
*/
SECStatus
SEC_PKCS12AddPasswordIntegrity(SEC_PKCS12ExportContext *p12ctxt,
SECItem *pwitem, SECOidTag integAlg)
{
if (!p12ctxt || p12ctxt->integrityEnabled) {
return SECFailure;
}
/* set up integrity information */
p12ctxt->pwdIntegrity = PR_TRUE;
p12ctxt->integrityInfo.pwdInfo.password =
(SECItem *)PORT_ArenaZAlloc(p12ctxt->arena, sizeof(SECItem));
if (!p12ctxt->integrityInfo.pwdInfo.password) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return SECFailure;
}
if (SECITEM_CopyItem(p12ctxt->arena,
p12ctxt->integrityInfo.pwdInfo.password, pwitem) != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return SECFailure;
}
p12ctxt->integrityInfo.pwdInfo.algorithm = integAlg;
p12ctxt->integrityEnabled = PR_TRUE;
return SECSuccess;
}
/* SEC_PKCS12AddPublicKeyIntegrity
* Add public key integrity to the exported data. If an integrity method
* has already been set, then return an error. The certificate must be
* allowed to be used as a signing cert.
*
* p12ctxt - the export context
* cert - signer certificate
* certDb - the certificate database
* algorithm - signing algorithm
* keySize - size of the signing key (?)
*/
SECStatus
SEC_PKCS12AddPublicKeyIntegrity(SEC_PKCS12ExportContext *p12ctxt,
CERTCertificate *cert, CERTCertDBHandle *certDb,
SECOidTag algorithm, int keySize)
{
if (!p12ctxt) {
return SECFailure;
}
p12ctxt->integrityInfo.pubkeyInfo.cert = cert;
p12ctxt->integrityInfo.pubkeyInfo.certDb = certDb;
p12ctxt->integrityInfo.pubkeyInfo.algorithm = algorithm;
p12ctxt->integrityInfo.pubkeyInfo.keySize = keySize;
p12ctxt->integrityEnabled = PR_TRUE;
return SECSuccess;
}
/*
* Adding safes - encrypted (password/public key) or unencrypted
* Each of the safe creation routines return an opaque pointer which
* are later passed into the routines for exporting certificates and
* keys.
*/
/* append the newly created safeInfo to list of safeInfos in the export
* context.
*/
static SECStatus
sec_pkcs12_append_safe_info(SEC_PKCS12ExportContext *p12ctxt, SEC_PKCS12SafeInfo *info)
{
void *mark = NULL, *dummy1 = NULL, *dummy2 = NULL;
if (!p12ctxt || !info) {
return SECFailure;
}
mark = PORT_ArenaMark(p12ctxt->arena);
/* if no safeInfos have been set, create the list, otherwise expand it. */
if (!p12ctxt->safeInfoCount) {
p12ctxt->safeInfos = (SEC_PKCS12SafeInfo **)PORT_ArenaZAlloc(p12ctxt->arena,
2 * sizeof(SEC_PKCS12SafeInfo *));
dummy1 = p12ctxt->safeInfos;
p12ctxt->authSafe.encodedSafes = (SECItem **)PORT_ArenaZAlloc(p12ctxt->arena,
2 * sizeof(SECItem *));
dummy2 = p12ctxt->authSafe.encodedSafes;
} else {
dummy1 = PORT_ArenaGrow(p12ctxt->arena, p12ctxt->safeInfos,
(p12ctxt->safeInfoCount + 1) * sizeof(SEC_PKCS12SafeInfo *),
(p12ctxt->safeInfoCount + 2) * sizeof(SEC_PKCS12SafeInfo *));
p12ctxt->safeInfos = (SEC_PKCS12SafeInfo **)dummy1;
dummy2 = PORT_ArenaGrow(p12ctxt->arena, p12ctxt->authSafe.encodedSafes,
(p12ctxt->authSafe.safeCount + 1) * sizeof(SECItem *),
(p12ctxt->authSafe.safeCount + 2) * sizeof(SECItem *));
p12ctxt->authSafe.encodedSafes = (SECItem **)dummy2;
}
if (!dummy1 || !dummy2) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* append the new safeInfo and null terminate the list */
p12ctxt->safeInfos[p12ctxt->safeInfoCount] = info;
p12ctxt->safeInfos[++p12ctxt->safeInfoCount] = NULL;
p12ctxt->authSafe.encodedSafes[p12ctxt->authSafe.safeCount] =
(SECItem *)PORT_ArenaZAlloc(p12ctxt->arena, sizeof(SECItem));
if (!p12ctxt->authSafe.encodedSafes[p12ctxt->authSafe.safeCount]) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
p12ctxt->authSafe.encodedSafes[++p12ctxt->authSafe.safeCount] = NULL;
PORT_ArenaUnmark(p12ctxt->arena, mark);
return SECSuccess;
loser:
PORT_ArenaRelease(p12ctxt->arena, mark);
return SECFailure;
}
/* SEC_PKCS12CreatePasswordPrivSafe
* Create a password privacy safe to store exported information in.
*
* p12ctxt - export context
* pwitem - password for encryption
* privAlg - pbe algorithm through which encryption is done.
*/
SEC_PKCS12SafeInfo *
SEC_PKCS12CreatePasswordPrivSafe(SEC_PKCS12ExportContext *p12ctxt,
SECItem *pwitem, SECOidTag privAlg)
{
SEC_PKCS12SafeInfo *safeInfo = NULL;
void *mark = NULL;
PK11SlotInfo *slot = NULL;
SECAlgorithmID *algId;
SECItem uniPwitem = { siBuffer, NULL, 0 };
if (!p12ctxt) {
return NULL;
}
/* allocate the safe info */
mark = PORT_ArenaMark(p12ctxt->arena);
safeInfo = (SEC_PKCS12SafeInfo *)PORT_ArenaZAlloc(p12ctxt->arena,
sizeof(SEC_PKCS12SafeInfo));
if (!safeInfo) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
PORT_ArenaRelease(p12ctxt->arena, mark);
return NULL;
}
safeInfo->itemCount = 0;
/* create the encrypted safe */
if (!SEC_PKCS5IsAlgorithmPBEAlgTag(privAlg) &&
PK11_AlgtagToMechanism(privAlg) == CKM_AES_CBC) {
safeInfo->cinfo = SEC_PKCS7CreateEncryptedDataWithPBEV2(SEC_OID_PKCS5_PBES2,
privAlg,
SEC_OID_UNKNOWN,
0,
p12ctxt->pwfn,
p12ctxt->pwfnarg);
} else {
safeInfo->cinfo = SEC_PKCS7CreateEncryptedData(privAlg, 0, p12ctxt->pwfn,
p12ctxt->pwfnarg);
}
if (!safeInfo->cinfo) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
safeInfo->arena = p12ctxt->arena;
if (!sec_pkcs12_encode_password(NULL, &uniPwitem, privAlg, pwitem)) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
if (SECITEM_CopyItem(p12ctxt->arena, &safeInfo->pwitem, &uniPwitem) != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* generate the encryption key */
slot = PK11_ReferenceSlot(p12ctxt->slot);
if (!slot) {
slot = PK11_GetInternalKeySlot();
if (!slot) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
}
algId = SEC_PKCS7GetEncryptionAlgorithm(safeInfo->cinfo);
safeInfo->encryptionKey = PK11_PBEKeyGen(slot, algId, &uniPwitem,
PR_FALSE, p12ctxt->wincx);
if (!safeInfo->encryptionKey) {
goto loser;
}
safeInfo->arena = p12ctxt->arena;
safeInfo->safe = NULL;
if (sec_pkcs12_append_safe_info(p12ctxt, safeInfo) != SECSuccess) {
goto loser;
}
if (uniPwitem.data) {
SECITEM_ZfreeItem(&uniPwitem, PR_FALSE);
}
PORT_ArenaUnmark(p12ctxt->arena, mark);
if (slot) {
PK11_FreeSlot(slot);
}
return safeInfo;
loser:
if (slot) {
PK11_FreeSlot(slot);
}
if (safeInfo->cinfo) {
SEC_PKCS7DestroyContentInfo(safeInfo->cinfo);
}
if (uniPwitem.data) {
SECITEM_ZfreeItem(&uniPwitem, PR_FALSE);
}
PORT_ArenaRelease(p12ctxt->arena, mark);
return NULL;
}
/* SEC_PKCS12CreateUnencryptedSafe
* Creates an unencrypted safe within the export context.
*
* p12ctxt - the export context
*/
SEC_PKCS12SafeInfo *
SEC_PKCS12CreateUnencryptedSafe(SEC_PKCS12ExportContext *p12ctxt)
{
SEC_PKCS12SafeInfo *safeInfo = NULL;
void *mark = NULL;
if (!p12ctxt) {
return NULL;
}
/* create the safe info */
mark = PORT_ArenaMark(p12ctxt->arena);
safeInfo = (SEC_PKCS12SafeInfo *)PORT_ArenaZAlloc(p12ctxt->arena,
sizeof(SEC_PKCS12SafeInfo));
if (!safeInfo) {
PORT_ArenaRelease(p12ctxt->arena, mark);
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
safeInfo->itemCount = 0;
/* create the safe content */
safeInfo->cinfo = SEC_PKCS7CreateData();
if (!safeInfo->cinfo) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
if (sec_pkcs12_append_safe_info(p12ctxt, safeInfo) != SECSuccess) {
goto loser;
}
PORT_ArenaUnmark(p12ctxt->arena, mark);
return safeInfo;
loser:
if (safeInfo->cinfo) {
SEC_PKCS7DestroyContentInfo(safeInfo->cinfo);
}
PORT_ArenaRelease(p12ctxt->arena, mark);
return NULL;
}
/* SEC_PKCS12CreatePubKeyEncryptedSafe
* Creates a safe which is protected by public key encryption.
*
* p12ctxt - the export context
* certDb - the certificate database
* signer - the signer's certificate
* recipients - the list of recipient certificates.
* algorithm - the encryption algorithm to use
* keysize - the algorithms key size (?)
*/
SEC_PKCS12SafeInfo *
SEC_PKCS12CreatePubKeyEncryptedSafe(SEC_PKCS12ExportContext *p12ctxt,
CERTCertDBHandle *certDb,
CERTCertificate *signer,
CERTCertificate **recipients,
SECOidTag algorithm, int keysize)
{
SEC_PKCS12SafeInfo *safeInfo = NULL;
void *mark = NULL;
if (!p12ctxt || !signer || !recipients || !(*recipients)) {
return NULL;
}
/* allocate the safeInfo */
mark = PORT_ArenaMark(p12ctxt->arena);
safeInfo = (SEC_PKCS12SafeInfo *)PORT_ArenaZAlloc(p12ctxt->arena,
sizeof(SEC_PKCS12SafeInfo));
if (!safeInfo) {
PORT_ArenaRelease(p12ctxt->arena, mark);
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
safeInfo->itemCount = 0;
safeInfo->arena = p12ctxt->arena;
/* create the enveloped content info using certUsageEmailSigner currently.
* XXX We need to eventually use something other than certUsageEmailSigner
*/
safeInfo->cinfo = SEC_PKCS7CreateEnvelopedData(signer, certUsageEmailSigner,
certDb, algorithm, keysize,
p12ctxt->pwfn, p12ctxt->pwfnarg);
if (!safeInfo->cinfo) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* add recipients */
if (recipients) {
unsigned int i = 0;
while (recipients[i] != NULL) {
SECStatus rv = SEC_PKCS7AddRecipient(safeInfo->cinfo, recipients[i],
certUsageEmailRecipient, certDb);
if (rv != SECSuccess) {
goto loser;
}
i++;
}
}
if (sec_pkcs12_append_safe_info(p12ctxt, safeInfo) != SECSuccess) {
goto loser;
}
PORT_ArenaUnmark(p12ctxt->arena, mark);
return safeInfo;
loser:
if (safeInfo->cinfo) {
SEC_PKCS7DestroyContentInfo(safeInfo->cinfo);
safeInfo->cinfo = NULL;
}
PORT_ArenaRelease(p12ctxt->arena, mark);
return NULL;
}
/*********************************
* Routines to handle the exporting of the keys and certificates
*********************************/
/* creates a safe contents which safeBags will be appended to */
sec_PKCS12SafeContents *
sec_PKCS12CreateSafeContents(PLArenaPool *arena)
{
sec_PKCS12SafeContents *safeContents;
if (arena == NULL) {
return NULL;
}
/* create the safe contents */
safeContents = (sec_PKCS12SafeContents *)PORT_ArenaZAlloc(arena,
sizeof(sec_PKCS12SafeContents));
if (!safeContents) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* set up the internal contents info */
safeContents->safeBags = NULL;
safeContents->arena = arena;
safeContents->bagCount = 0;
return safeContents;
loser:
return NULL;
}
/* appends a safe bag to a safeContents using the specified arena.
*/
SECStatus
sec_pkcs12_append_bag_to_safe_contents(PLArenaPool *arena,
sec_PKCS12SafeContents *safeContents,
sec_PKCS12SafeBag *safeBag)
{
void *mark = NULL, *dummy = NULL;
if (!arena || !safeBag || !safeContents) {
return SECFailure;
}
mark = PORT_ArenaMark(arena);
if (!mark) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return SECFailure;
}
/* allocate space for the list, or reallocate to increase space */
if (!safeContents->safeBags) {
safeContents->safeBags = (sec_PKCS12SafeBag **)PORT_ArenaZAlloc(arena,
(2 * sizeof(sec_PKCS12SafeBag *)));
dummy = safeContents->safeBags;
safeContents->bagCount = 0;
} else {
dummy = PORT_ArenaGrow(arena, safeContents->safeBags,
(safeContents->bagCount + 1) * sizeof(sec_PKCS12SafeBag *),
(safeContents->bagCount + 2) * sizeof(sec_PKCS12SafeBag *));
safeContents->safeBags = (sec_PKCS12SafeBag **)dummy;
}
if (!dummy) {
PORT_ArenaRelease(arena, mark);
PORT_SetError(SEC_ERROR_NO_MEMORY);
return SECFailure;
}
/* append the bag at the end and null terminate the list */
safeContents->safeBags[safeContents->bagCount++] = safeBag;
safeContents->safeBags[safeContents->bagCount] = NULL;
PORT_ArenaUnmark(arena, mark);
return SECSuccess;
}
/* appends a safeBag to a specific safeInfo.
*/
SECStatus
sec_pkcs12_append_bag(SEC_PKCS12ExportContext *p12ctxt,
SEC_PKCS12SafeInfo *safeInfo, sec_PKCS12SafeBag *safeBag)
{
sec_PKCS12SafeContents *dest;
SECStatus rv = SECFailure;
if (!p12ctxt || !safeBag || !safeInfo) {
return SECFailure;
}
if (!safeInfo->safe) {
safeInfo->safe = sec_PKCS12CreateSafeContents(p12ctxt->arena);
if (!safeInfo->safe) {
return SECFailure;
}
}
dest = safeInfo->safe;
rv = sec_pkcs12_append_bag_to_safe_contents(p12ctxt->arena, dest, safeBag);
if (rv == SECSuccess) {
safeInfo->itemCount++;
}
return rv;
}
/* Creates a safeBag of the specified type, and if bagData is specified,
* the contents are set. The contents could be set later by the calling
* routine.
*/
sec_PKCS12SafeBag *
sec_PKCS12CreateSafeBag(SEC_PKCS12ExportContext *p12ctxt, SECOidTag bagType,
void *bagData)
{
sec_PKCS12SafeBag *safeBag;
void *mark = NULL;
SECStatus rv = SECSuccess;
SECOidData *oidData = NULL;
if (!p12ctxt) {
return NULL;
}
mark = PORT_ArenaMark(p12ctxt->arena);
if (!mark) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
safeBag = (sec_PKCS12SafeBag *)PORT_ArenaZAlloc(p12ctxt->arena,
sizeof(sec_PKCS12SafeBag));
if (!safeBag) {
PORT_ArenaRelease(p12ctxt->arena, mark);
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
/* set the bags content based upon bag type */
switch (bagType) {
case SEC_OID_PKCS12_V1_KEY_BAG_ID:
safeBag->safeBagContent.pkcs8KeyBag =
(SECKEYPrivateKeyInfo *)bagData;
break;
case SEC_OID_PKCS12_V1_CERT_BAG_ID:
safeBag->safeBagContent.certBag = (sec_PKCS12CertBag *)bagData;
break;
case SEC_OID_PKCS12_V1_CRL_BAG_ID:
safeBag->safeBagContent.crlBag = (sec_PKCS12CRLBag *)bagData;
break;
case SEC_OID_PKCS12_V1_SECRET_BAG_ID:
safeBag->safeBagContent.secretBag = (sec_PKCS12SecretBag *)bagData;
break;
case SEC_OID_PKCS12_V1_PKCS8_SHROUDED_KEY_BAG_ID:
safeBag->safeBagContent.pkcs8ShroudedKeyBag =
(SECKEYEncryptedPrivateKeyInfo *)bagData;
break;
case SEC_OID_PKCS12_V1_SAFE_CONTENTS_BAG_ID:
safeBag->safeBagContent.safeContents =
(sec_PKCS12SafeContents *)bagData;
break;
default:
goto loser;
}
oidData = SECOID_FindOIDByTag(bagType);
if (oidData) {
rv = SECITEM_CopyItem(p12ctxt->arena, &safeBag->safeBagType, &oidData->oid);
if (rv != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
} else {
goto loser;
}
safeBag->arena = p12ctxt->arena;
PORT_ArenaUnmark(p12ctxt->arena, mark);
return safeBag;
loser:
if (mark) {
PORT_ArenaRelease(p12ctxt->arena, mark);
}
return NULL;
}
/* Creates a new certificate bag and returns a pointer to it. If an error
* occurs NULL is returned.
*/
sec_PKCS12CertBag *
sec_PKCS12NewCertBag(PLArenaPool *arena, SECOidTag certType)
{
sec_PKCS12CertBag *certBag = NULL;
SECOidData *bagType = NULL;
SECStatus rv;
void *mark = NULL;
if (!arena) {
return NULL;
}
mark = PORT_ArenaMark(arena);
certBag = (sec_PKCS12CertBag *)PORT_ArenaZAlloc(arena,
sizeof(sec_PKCS12CertBag));
if (!certBag) {
PORT_ArenaRelease(arena, mark);
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
bagType = SECOID_FindOIDByTag(certType);
if (!bagType) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
rv = SECITEM_CopyItem(arena, &certBag->bagID, &bagType->oid);
if (rv != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
PORT_ArenaUnmark(arena, mark);
return certBag;
loser:
PORT_ArenaRelease(arena, mark);
return NULL;
}
/* Creates a new CRL bag and returns a pointer to it. If an error
* occurs NULL is returned.
*/
sec_PKCS12CRLBag *
sec_PKCS12NewCRLBag(PLArenaPool *arena, SECOidTag crlType)
{
sec_PKCS12CRLBag *crlBag = NULL;
SECOidData *bagType = NULL;
SECStatus rv;
void *mark = NULL;
if (!arena) {
return NULL;
}
mark = PORT_ArenaMark(arena);
crlBag = (sec_PKCS12CRLBag *)PORT_ArenaZAlloc(arena,
sizeof(sec_PKCS12CRLBag));
if (!crlBag) {
PORT_ArenaRelease(arena, mark);
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
bagType = SECOID_FindOIDByTag(crlType);
if (!bagType) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
rv = SECITEM_CopyItem(arena, &crlBag->bagID, &bagType->oid);
if (rv != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
PORT_ArenaUnmark(arena, mark);
return crlBag;
loser:
PORT_ArenaRelease(arena, mark);
return NULL;
}
/* sec_PKCS12AddAttributeToBag
* adds an attribute to a safeBag. currently, the only attributes supported
* are those which are specified within PKCS 12.
*
* p12ctxt - the export context
* safeBag - the safeBag to which attributes are appended
* attrType - the attribute type
* attrData - the attribute data
*/
SECStatus
sec_PKCS12AddAttributeToBag(SEC_PKCS12ExportContext *p12ctxt,
sec_PKCS12SafeBag *safeBag, SECOidTag attrType,
SECItem *attrData)
{
sec_PKCS12Attribute *attribute;
void *mark = NULL, *dummy = NULL;
SECOidData *oiddata = NULL;
SECItem unicodeName = { siBuffer, NULL, 0 };
void *src = NULL;
unsigned int nItems = 0;
SECStatus rv;
if (!safeBag || !p12ctxt) {
return SECFailure;
}
mark = PORT_ArenaMark(safeBag->arena);
/* allocate the attribute */
attribute = (sec_PKCS12Attribute *)PORT_ArenaZAlloc(safeBag->arena,
sizeof(sec_PKCS12Attribute));
if (!attribute) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* set up the attribute */
oiddata = SECOID_FindOIDByTag(attrType);
if (!oiddata) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
if (SECITEM_CopyItem(p12ctxt->arena, &attribute->attrType, &oiddata->oid) !=
SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
nItems = 1;
switch (attrType) {
case SEC_OID_PKCS9_LOCAL_KEY_ID: {
src = attrData;
break;
}
case SEC_OID_PKCS9_FRIENDLY_NAME: {
if (!sec_pkcs12_convert_item_to_unicode(p12ctxt->arena,
&unicodeName, attrData, PR_FALSE,
PR_FALSE, PR_TRUE)) {
goto loser;
}
src = &unicodeName;
break;
}
default:
goto loser;
}
/* append the attribute to the attribute value list */
attribute->attrValue = (SECItem **)PORT_ArenaZAlloc(p12ctxt->arena,
((nItems + 1) * sizeof(SECItem *)));
if (!attribute->attrValue) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* XXX this will need to be changed if attributes requiring more than
* one element are ever used.
*/
attribute->attrValue[0] = (SECItem *)PORT_ArenaZAlloc(p12ctxt->arena,
sizeof(SECItem));
if (!attribute->attrValue[0]) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
attribute->attrValue[1] = NULL;
rv = SECITEM_CopyItem(p12ctxt->arena, attribute->attrValue[0],
(SECItem *)src);
if (rv != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* append the attribute to the safeBag attributes */
if (safeBag->nAttribs) {
dummy = PORT_ArenaGrow(p12ctxt->arena, safeBag->attribs,
((safeBag->nAttribs + 1) * sizeof(sec_PKCS12Attribute *)),
((safeBag->nAttribs + 2) * sizeof(sec_PKCS12Attribute *)));
safeBag->attribs = (sec_PKCS12Attribute **)dummy;
} else {
safeBag->attribs = (sec_PKCS12Attribute **)PORT_ArenaZAlloc(p12ctxt->arena,
2 * sizeof(sec_PKCS12Attribute *));
dummy = safeBag->attribs;
}
if (!dummy) {
goto loser;
}
safeBag->attribs[safeBag->nAttribs] = attribute;
safeBag->attribs[++safeBag->nAttribs] = NULL;
PORT_ArenaUnmark(p12ctxt->arena, mark);
return SECSuccess;
loser:
if (mark) {
PORT_ArenaRelease(p12ctxt->arena, mark);
}
return SECFailure;
}
/* SEC_PKCS12AddCert
* Adds a certificate to the data being exported.
*
* p12ctxt - the export context
* safe - the safeInfo to which the certificate is placed
* nestedDest - if the cert is to be placed within a nested safeContents then,
* this value is to be specified with the destination
* cert - the cert to export
* certDb - the certificate database handle
* keyId - a unique identifier to associate a certificate/key pair
* includeCertChain - PR_TRUE if the certificate chain is to be included.
*/
SECStatus
SEC_PKCS12AddCert(SEC_PKCS12ExportContext *p12ctxt, SEC_PKCS12SafeInfo *safe,
void *nestedDest, CERTCertificate *cert,
CERTCertDBHandle *certDb, SECItem *keyId,
PRBool includeCertChain)
{
sec_PKCS12CertBag *certBag;
sec_PKCS12SafeBag *safeBag;
void *mark;
SECStatus rv;
SECItem nick = { siBuffer, NULL, 0 };
if (!p12ctxt || !cert) {
return SECFailure;
}
mark = PORT_ArenaMark(p12ctxt->arena);
/* allocate the cert bag */
certBag = sec_PKCS12NewCertBag(p12ctxt->arena,
SEC_OID_PKCS9_X509_CERT);
if (!certBag) {
goto loser;
}
if (SECITEM_CopyItem(p12ctxt->arena, &certBag->value.x509Cert,
&cert->derCert) != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* if the cert chain is to be included, we should only be exporting
* the cert from our internal database.
*/
if (includeCertChain) {
CERTCertificateList *certList = CERT_CertChainFromCert(cert,
certUsageSSLClient,
PR_TRUE);
unsigned int count = 0;
if (!certList) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* add cert chain */
for (count = 0; count < (unsigned int)certList->len; count++) {
if (SECITEM_CompareItem(&certList->certs[count], &cert->derCert) != SECEqual) {
CERTCertificate *tempCert;
/* decode the certificate */
/* XXX
* This was rather silly. The chain is constructed above
* by finding all of the CERTCertificate's in the database.
* Then the chain is put into a CERTCertificateList, which only
* contains the DER. Finally, the DER was decoded, and the
* decoded cert was sent recursively back to this function.
* Beyond being inefficent, this causes data loss (specifically,
* the nickname). Instead, for 3.4, we'll do a lookup by the
* DER, which should return the cached entry.
*/
tempCert = CERT_FindCertByDERCert(CERT_GetDefaultCertDB(),
&certList->certs[count]);
if (!tempCert) {
CERT_DestroyCertificateList(certList);
goto loser;
}
/* add the certificate */
if (SEC_PKCS12AddCert(p12ctxt, safe, nestedDest, tempCert,
certDb, NULL, PR_FALSE) != SECSuccess) {
CERT_DestroyCertificate(tempCert);
CERT_DestroyCertificateList(certList);
goto loser;
}
CERT_DestroyCertificate(tempCert);
}
}
CERT_DestroyCertificateList(certList);
}
/* if the certificate has a nickname, we will set the friendly name
* to that.
*/
if (cert->nickname) {
if (cert->slot && !PK11_IsInternal(cert->slot)) {
/*
* The cert is coming off of an external token,
* let's strip the token name from the nickname
* and only add what comes after the colon as the
* nickname. -javi
*/
char *delimit;
delimit = PORT_Strchr(cert->nickname, ':');
if (delimit == NULL) {
nick.data = (unsigned char *)cert->nickname;
nick.len = PORT_Strlen(cert->nickname);
} else {
delimit++;
nick.data = (unsigned char *)PORT_ArenaStrdup(p12ctxt->arena,
delimit);
nick.len = PORT_Strlen(delimit);
}
} else {
nick.data = (unsigned char *)cert->nickname;
nick.len = PORT_Strlen(cert->nickname);
}
}
safeBag = sec_PKCS12CreateSafeBag(p12ctxt, SEC_OID_PKCS12_V1_CERT_BAG_ID,
certBag);
if (!safeBag) {
goto loser;
}
/* add the friendly name and keyId attributes, if necessary */
if (nick.data) {
if (sec_PKCS12AddAttributeToBag(p12ctxt, safeBag,
SEC_OID_PKCS9_FRIENDLY_NAME, &nick) != SECSuccess) {
goto loser;
}
}
if (keyId) {
if (sec_PKCS12AddAttributeToBag(p12ctxt, safeBag, SEC_OID_PKCS9_LOCAL_KEY_ID,
keyId) != SECSuccess) {
goto loser;
}
}
/* append the cert safeBag */
if (nestedDest) {
rv = sec_pkcs12_append_bag_to_safe_contents(p12ctxt->arena,
(sec_PKCS12SafeContents *)nestedDest,
safeBag);
} else {
rv = sec_pkcs12_append_bag(p12ctxt, safe, safeBag);
}
if (rv != SECSuccess) {
goto loser;
}
PORT_ArenaUnmark(p12ctxt->arena, mark);
return SECSuccess;
loser:
if (mark) {
PORT_ArenaRelease(p12ctxt->arena, mark);
}
return SECFailure;
}
/* SEC_PKCS12AddKeyForCert
* Extracts the key associated with a particular certificate and exports
* it.
*
* p12ctxt - the export context
* safe - the safeInfo to place the key in
* nestedDest - the nested safeContents to place a key
* cert - the certificate which the key belongs to
* shroudKey - encrypt the private key for export. This value should
* always be true. lower level code will not allow the export
* of unencrypted private keys.
* algorithm - the algorithm with which to encrypt the private key
* pwitem - the password to encrypt the private key with
* keyId - the keyID attribute
* nickName - the nickname attribute
*/
SECStatus
SEC_PKCS12AddKeyForCert(SEC_PKCS12ExportContext *p12ctxt, SEC_PKCS12SafeInfo *safe,
void *nestedDest, CERTCertificate *cert,
PRBool shroudKey, SECOidTag algorithm, SECItem *pwitem,
SECItem *keyId, SECItem *nickName)
{
void *mark;
void *keyItem;
SECOidTag keyType;
SECStatus rv = SECFailure;
SECItem nickname = { siBuffer, NULL, 0 }, uniPwitem = { siBuffer, NULL, 0 };
sec_PKCS12SafeBag *returnBag;
if (!p12ctxt || !cert || !safe) {
return SECFailure;
}
mark = PORT_ArenaMark(p12ctxt->arena);
/* retrieve the key based upon the type that it is and
* specify the type of safeBag to store the key in
*/
if (!shroudKey) {
/* extract the key unencrypted. this will most likely go away */
SECKEYPrivateKeyInfo *pki = PK11_ExportPrivateKeyInfo(cert,
p12ctxt->wincx);
if (!pki) {
PORT_ArenaRelease(p12ctxt->arena, mark);
PORT_SetError(SEC_ERROR_PKCS12_UNABLE_TO_EXPORT_KEY);
return SECFailure;
}
keyItem = PORT_ArenaZAlloc(p12ctxt->arena, sizeof(SECKEYPrivateKeyInfo));
if (!keyItem) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
rv = SECKEY_CopyPrivateKeyInfo(p12ctxt->arena,
(SECKEYPrivateKeyInfo *)keyItem, pki);
keyType = SEC_OID_PKCS12_V1_KEY_BAG_ID;
SECKEY_DestroyPrivateKeyInfo(pki, PR_TRUE);
} else {
/* extract the key encrypted */
SECKEYEncryptedPrivateKeyInfo *epki = NULL;
PK11SlotInfo *slot = NULL;
if (!sec_pkcs12_encode_password(p12ctxt->arena, &uniPwitem, algorithm,
pwitem)) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* we want to make sure to take the key out of the key slot */
if (PK11_IsInternal(p12ctxt->slot)) {
slot = PK11_GetInternalKeySlot();
} else {
slot = PK11_ReferenceSlot(p12ctxt->slot);
}
epki = PK11_ExportEncryptedPrivateKeyInfo(slot, algorithm,
&uniPwitem, cert,
NSS_PBE_DEFAULT_ITERATION_COUNT,
p12ctxt->wincx);
PK11_FreeSlot(slot);
if (!epki) {
PORT_SetError(SEC_ERROR_PKCS12_UNABLE_TO_EXPORT_KEY);
goto loser;
}
keyItem = PORT_ArenaZAlloc(p12ctxt->arena,
sizeof(SECKEYEncryptedPrivateKeyInfo));
if (!keyItem) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
rv = SECKEY_CopyEncryptedPrivateKeyInfo(p12ctxt->arena,
(SECKEYEncryptedPrivateKeyInfo *)keyItem,
epki);
keyType = SEC_OID_PKCS12_V1_PKCS8_SHROUDED_KEY_BAG_ID;
SECKEY_DestroyEncryptedPrivateKeyInfo(epki, PR_TRUE);
}
if (rv != SECSuccess) {
goto loser;
}
/* if no nickname specified, let's see if the certificate has a
* nickname.
*/
if (!nickName) {
if (cert->nickname) {
nickname.data = (unsigned char *)cert->nickname;
nickname.len = PORT_Strlen(cert->nickname);
nickName = &nickname;
}
}
/* create the safe bag and set any attributes */
returnBag = sec_PKCS12CreateSafeBag(p12ctxt, keyType, keyItem);
if (!returnBag) {
rv = SECFailure;
goto loser;
}
if (nickName) {
if (sec_PKCS12AddAttributeToBag(p12ctxt, returnBag,
SEC_OID_PKCS9_FRIENDLY_NAME, nickName) != SECSuccess) {
goto loser;
}
}
if (keyId) {
if (sec_PKCS12AddAttributeToBag(p12ctxt, returnBag, SEC_OID_PKCS9_LOCAL_KEY_ID,
keyId) != SECSuccess) {
goto loser;
}
}
if (nestedDest) {
rv = sec_pkcs12_append_bag_to_safe_contents(p12ctxt->arena,
(sec_PKCS12SafeContents *)nestedDest,
returnBag);
} else {
rv = sec_pkcs12_append_bag(p12ctxt, safe, returnBag);
}
loser:
if (rv != SECSuccess) {
PORT_ArenaRelease(p12ctxt->arena, mark);
} else {
PORT_ArenaUnmark(p12ctxt->arena, mark);
}
return rv;
}
/* SEC_PKCS12AddCertOrChainAndKey
* Add a certificate and key pair to be exported.
*
* p12ctxt - the export context
* certSafe - the safeInfo where the cert is stored
* certNestedDest - the nested safeContents to store the cert
* keySafe - the safeInfo where the key is stored
* keyNestedDest - the nested safeContents to store the key
* shroudKey - extract the private key encrypted?
* pwitem - the password with which the key is encrypted
* algorithm - the algorithm with which the key is encrypted
* includeCertChain - also add certs from chain to bag.
*/
SECStatus
SEC_PKCS12AddCertOrChainAndKey(SEC_PKCS12ExportContext *p12ctxt,
void *certSafe, void *certNestedDest,
CERTCertificate *cert, CERTCertDBHandle *certDb,
void *keySafe, void *keyNestedDest,
PRBool shroudKey, SECItem *pwitem,
SECOidTag algorithm, PRBool includeCertChain)
{
SECStatus rv = SECFailure;
SGNDigestInfo *digest = NULL;
void *mark = NULL;
if (!p12ctxt || !certSafe || !keySafe || !cert) {
return SECFailure;
}
mark = PORT_ArenaMark(p12ctxt->arena);
/* generate the thumbprint of the cert to use as a keyId */
digest = sec_pkcs12_compute_thumbprint(&cert->derCert);
if (!digest) {
PORT_ArenaRelease(p12ctxt->arena, mark);
return SECFailure;
}
/* add the certificate */
rv = SEC_PKCS12AddCert(p12ctxt, (SEC_PKCS12SafeInfo *)certSafe,
(SEC_PKCS12SafeInfo *)certNestedDest, cert, certDb,
&digest->digest, includeCertChain);
if (rv != SECSuccess) {
goto loser;
}
/* add the key */
rv = SEC_PKCS12AddKeyForCert(p12ctxt, (SEC_PKCS12SafeInfo *)keySafe,
keyNestedDest, cert,
shroudKey, algorithm, pwitem,
&digest->digest, NULL);
if (rv != SECSuccess) {
goto loser;
}
SGN_DestroyDigestInfo(digest);
PORT_ArenaUnmark(p12ctxt->arena, mark);
return SECSuccess;
loser:
SGN_DestroyDigestInfo(digest);
PORT_ArenaRelease(p12ctxt->arena, mark);
return SECFailure;
}
/* like SEC_PKCS12AddCertOrChainAndKey, but always adds cert chain */
SECStatus
SEC_PKCS12AddCertAndKey(SEC_PKCS12ExportContext *p12ctxt,
void *certSafe, void *certNestedDest,
CERTCertificate *cert, CERTCertDBHandle *certDb,
void *keySafe, void *keyNestedDest,
PRBool shroudKey, SECItem *pwItem, SECOidTag algorithm)
{
return SEC_PKCS12AddCertOrChainAndKey(p12ctxt, certSafe, certNestedDest,
cert, certDb, keySafe, keyNestedDest, shroudKey, pwItem,
algorithm, PR_TRUE);
}
/* SEC_PKCS12CreateNestedSafeContents
* Allows nesting of safe contents to be implemented. No limit imposed on
* depth.
*
* p12ctxt - the export context
* baseSafe - the base safeInfo
* nestedDest - a parent safeContents (?)
*/
void *
SEC_PKCS12CreateNestedSafeContents(SEC_PKCS12ExportContext *p12ctxt,
void *baseSafe, void *nestedDest)
{
sec_PKCS12SafeContents *newSafe;
sec_PKCS12SafeBag *safeContentsBag;
void *mark;
SECStatus rv;
if (!p12ctxt || !baseSafe) {
return NULL;
}
mark = PORT_ArenaMark(p12ctxt->arena);
newSafe = sec_PKCS12CreateSafeContents(p12ctxt->arena);
if (!newSafe) {
PORT_ArenaRelease(p12ctxt->arena, mark);
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
/* create the safeContents safeBag */
safeContentsBag = sec_PKCS12CreateSafeBag(p12ctxt,
SEC_OID_PKCS12_V1_SAFE_CONTENTS_BAG_ID,
newSafe);
if (!safeContentsBag) {
goto loser;
}
/* append the safeContents to the appropriate area */
if (nestedDest) {
rv = sec_pkcs12_append_bag_to_safe_contents(p12ctxt->arena,
(sec_PKCS12SafeContents *)nestedDest,
safeContentsBag);
} else {
rv = sec_pkcs12_append_bag(p12ctxt, (SEC_PKCS12SafeInfo *)baseSafe,
safeContentsBag);
}
if (rv != SECSuccess) {
goto loser;
}
PORT_ArenaUnmark(p12ctxt->arena, mark);
return newSafe;
loser:
PORT_ArenaRelease(p12ctxt->arena, mark);
return NULL;
}
/*********************************
* Encoding routines
*********************************/
/* Clean up the resources allocated by a sec_PKCS12EncoderContext. */
static void
sec_pkcs12_encoder_destroy_context(sec_PKCS12EncoderContext *p12enc)
{
if (p12enc) {
if (p12enc->outerA1ecx) {
SEC_ASN1EncoderFinish(p12enc->outerA1ecx);
p12enc->outerA1ecx = NULL;
}
if (p12enc->aSafeCinfo) {
SEC_PKCS7DestroyContentInfo(p12enc->aSafeCinfo);
p12enc->aSafeCinfo = NULL;
}
if (p12enc->middleP7ecx) {
SEC_PKCS7EncoderFinish(p12enc->middleP7ecx, p12enc->p12exp->pwfn,
p12enc->p12exp->pwfnarg);
p12enc->middleP7ecx = NULL;
}
if (p12enc->middleA1ecx) {
SEC_ASN1EncoderFinish(p12enc->middleA1ecx);
p12enc->middleA1ecx = NULL;
}
if (p12enc->hmacCx) {
PK11_DestroyContext(p12enc->hmacCx, PR_TRUE);
p12enc->hmacCx = NULL;
}
}
}
/* set up the encoder context based on information in the export context
* and return the newly allocated enocoder context. A return of NULL
* indicates an error occurred.
*/
static sec_PKCS12EncoderContext *
sec_pkcs12_encoder_start_context(SEC_PKCS12ExportContext *p12exp)
{
sec_PKCS12EncoderContext *p12enc = NULL;
unsigned int i, nonEmptyCnt;
SECStatus rv;
SECItem ignore = { 0 };
void *mark;
SECItem *salt = NULL;
SECItem *params = NULL;
if (!p12exp || !p12exp->safeInfos) {
return NULL;
}
/* check for any empty safes and skip them */
i = nonEmptyCnt = 0;
while (p12exp->safeInfos[i]) {
if (p12exp->safeInfos[i]->itemCount) {
nonEmptyCnt++;
}
i++;
}
if (nonEmptyCnt == 0) {
return NULL;
}
p12exp->authSafe.encodedSafes[nonEmptyCnt] = NULL;
/* allocate the encoder context */
mark = PORT_ArenaMark(p12exp->arena);
p12enc = PORT_ArenaZNew(p12exp->arena, sec_PKCS12EncoderContext);
if (!p12enc) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return NULL;
}
p12enc->arena = p12exp->arena;
p12enc->p12exp = p12exp;
/* set up the PFX version and information */
PORT_Memset(&p12enc->pfx, 0, sizeof(sec_PKCS12PFXItem));
if (!SEC_ASN1EncodeInteger(p12exp->arena, &(p12enc->pfx.version),
SEC_PKCS12_VERSION)) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* set up the authenticated safe content info based on the
* type of integrity being used. this should be changed to
* enforce integrity mode, but will not be implemented until
* it is confirmed that integrity must be in place
*/
if (p12exp->integrityEnabled && !p12exp->pwdIntegrity) {
/* create public key integrity mode */
p12enc->aSafeCinfo = SEC_PKCS7CreateSignedData(
p12exp->integrityInfo.pubkeyInfo.cert,
certUsageEmailSigner,
p12exp->integrityInfo.pubkeyInfo.certDb,
p12exp->integrityInfo.pubkeyInfo.algorithm,
NULL,
p12exp->pwfn,
p12exp->pwfnarg);
if (!p12enc->aSafeCinfo) {
goto loser;
}
if (SEC_PKCS7IncludeCertChain(p12enc->aSafeCinfo, NULL) != SECSuccess) {
goto loser;
}
PORT_CheckSuccess(SEC_PKCS7AddSigningTime(p12enc->aSafeCinfo));
} else {
p12enc->aSafeCinfo = SEC_PKCS7CreateData();
/* init password pased integrity mode */
if (p12exp->integrityEnabled) {
SECItem pwd = { siBuffer, NULL, 0 };
PK11SymKey *symKey;
CK_MECHANISM_TYPE integrityMechType;
CK_MECHANISM_TYPE hmacMechType;
salt = sec_pkcs12_generate_salt();
/* zero out macData and set values */
PORT_Memset(&p12enc->mac, 0, sizeof(sec_PKCS12MacData));
if (!salt) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
if (SECITEM_CopyItem(p12exp->arena, &(p12enc->mac.macSalt), salt) != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
if (!SEC_ASN1EncodeInteger(p12exp->arena, &(p12enc->mac.iter),
NSS_PBE_DEFAULT_ITERATION_COUNT)) {
goto loser;
}
/* generate HMAC key */
if (!sec_pkcs12_convert_item_to_unicode(NULL, &pwd,
p12exp->integrityInfo.pwdInfo.password, PR_TRUE,
PR_TRUE, PR_TRUE)) {
goto loser;
}
/*
* This code only works with PKCS #12 Mac using PKCS #5 v1
* PBA keygens. PKCS #5 v2 support will require a change to
* the PKCS #12 spec.
*/
params = PK11_CreatePBEParams(salt, &pwd,
NSS_PBE_DEFAULT_ITERATION_COUNT);
SECITEM_ZfreeItem(salt, PR_TRUE);
SECITEM_ZfreeItem(&pwd, PR_FALSE);
/* get the PBA Mechanism to generate the key */
switch (p12exp->integrityInfo.pwdInfo.algorithm) {
case SEC_OID_SHA1:
integrityMechType = CKM_PBA_SHA1_WITH_SHA1_HMAC;
break;
case SEC_OID_MD5:
integrityMechType = CKM_NETSCAPE_PBE_MD5_HMAC_KEY_GEN;
break;
case SEC_OID_MD2:
integrityMechType = CKM_NETSCAPE_PBE_MD2_HMAC_KEY_GEN;
break;
default:
goto loser;
}
/* generate the key */
symKey = PK11_KeyGen(NULL, integrityMechType, params, 20, NULL);
PK11_DestroyPBEParams(params);
if (!symKey) {
goto loser;
}
/* initialize HMAC */
/* Get the HMAC mechanism from the hash OID */
hmacMechType = sec_pkcs12_algtag_to_mech(
p12exp->integrityInfo.pwdInfo.algorithm);
p12enc->hmacCx = PK11_CreateContextBySymKey(hmacMechType,
CKA_SIGN, symKey, &ignore);
PK11_FreeSymKey(symKey);
if (!p12enc->hmacCx) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
rv = PK11_DigestBegin(p12enc->hmacCx);
if (rv != SECSuccess)
goto loser;
}
}
if (!p12enc->aSafeCinfo) {
goto loser;
}
PORT_ArenaUnmark(p12exp->arena, mark);
return p12enc;
loser:
sec_pkcs12_encoder_destroy_context(p12enc);
if (p12exp->arena != NULL)
PORT_ArenaRelease(p12exp->arena, mark);
if (salt) {
SECITEM_ZfreeItem(salt, PR_TRUE);
}
if (params) {
PK11_DestroyPBEParams(params);
}
return NULL;
}
/* The outermost ASN.1 encoder calls this function for output.
** This function calls back to the library caller's output routine,
** which typically writes to a PKCS12 file.
*/
static void
sec_P12A1OutputCB_Outer(void *arg, const char *buf, unsigned long len,
int depth, SEC_ASN1EncodingPart data_kind)
{
struct sec_pkcs12_encoder_output *output;
output = (struct sec_pkcs12_encoder_output *)arg;
(*output->outputfn)(output->outputarg, buf, len);
}
/* The "middle" and "inner" ASN.1 encoders call this function to output.
** This function does HMACing, if appropriate, and then buffers the data.
** The buffered data is eventually passed down to the underlying PKCS7 encoder.
*/
static void
sec_P12A1OutputCB_HmacP7Update(void *arg, const char *buf,
unsigned long len,
int depth,
SEC_ASN1EncodingPart data_kind)
{
sec_pkcs12OutputBuffer *bufcx = (sec_pkcs12OutputBuffer *)arg;
if (!buf || !len)
return;
if (bufcx->hmacCx) {
PK11_DigestOp(bufcx->hmacCx, (unsigned char *)buf, len);
}
/* buffer */
if (bufcx->numBytes > 0) {
int toCopy;
if (len + bufcx->numBytes <= bufcx->bufBytes) {
memcpy(bufcx->buf + bufcx->numBytes, buf, len);
bufcx->numBytes += len;
if (bufcx->numBytes < bufcx->bufBytes)
return;
SEC_PKCS7EncoderUpdate(bufcx->p7eCx, bufcx->buf, bufcx->bufBytes);
bufcx->numBytes = 0;
return;
}
toCopy = bufcx->bufBytes - bufcx->numBytes;
memcpy(bufcx->buf + bufcx->numBytes, buf, toCopy);
SEC_PKCS7EncoderUpdate(bufcx->p7eCx, bufcx->buf, bufcx->bufBytes);
bufcx->numBytes = 0;
len -= toCopy;
buf += toCopy;
}
/* buffer is presently empty */
if (len >= bufcx->bufBytes) {
/* Just pass it through */
SEC_PKCS7EncoderUpdate(bufcx->p7eCx, buf, len);
} else {
/* copy it all into the buffer, and return */
memcpy(bufcx->buf, buf, len);
bufcx->numBytes = len;
}
}
void
sec_FlushPkcs12OutputBuffer(sec_pkcs12OutputBuffer *bufcx)
{
if (bufcx->numBytes > 0) {
SEC_PKCS7EncoderUpdate(bufcx->p7eCx, bufcx->buf, bufcx->numBytes);
bufcx->numBytes = 0;
}
}
/* Feeds the output of a PKCS7 encoder into the next outward ASN.1 encoder.
** This function is used by both the inner and middle PCS7 encoders.
*/
static void
sec_P12P7OutputCB_CallA1Update(void *arg, const char *buf, unsigned long len)
{
SEC_ASN1EncoderContext *cx = (SEC_ASN1EncoderContext *)arg;
if (!buf || !len)
return;
SEC_ASN1EncoderUpdate(cx, buf, len);
}
/* this function encodes content infos which are part of the
* sequence of content infos labeled AuthenticatedSafes
*/
static SECStatus
sec_pkcs12_encoder_asafe_process(sec_PKCS12EncoderContext *p12ecx)
{
SEC_PKCS7EncoderContext *innerP7ecx;
SEC_PKCS7ContentInfo *cinfo;
PK11SymKey *bulkKey = NULL;
SEC_ASN1EncoderContext *innerA1ecx = NULL;
SECStatus rv = SECSuccess;
if (p12ecx->currentSafe < p12ecx->p12exp->authSafe.safeCount) {
SEC_PKCS12SafeInfo *safeInfo;
SECOidTag cinfoType;
safeInfo = p12ecx->p12exp->safeInfos[p12ecx->currentSafe];
/* skip empty safes */
if (safeInfo->itemCount == 0) {
return SECSuccess;
}
cinfo = safeInfo->cinfo;
cinfoType = SEC_PKCS7ContentType(cinfo);
/* determine the safe type and set the appropriate argument */
switch (cinfoType) {
case SEC_OID_PKCS7_DATA:
case SEC_OID_PKCS7_ENVELOPED_DATA:
break;
case SEC_OID_PKCS7_ENCRYPTED_DATA:
bulkKey = safeInfo->encryptionKey;
PK11_SetSymKeyUserData(bulkKey, &safeInfo->pwitem, NULL);
break;
default:
return SECFailure;
}
/* start the PKCS7 encoder */
innerP7ecx = SEC_PKCS7EncoderStart(cinfo,
sec_P12P7OutputCB_CallA1Update,
p12ecx->middleA1ecx, bulkKey);
if (!innerP7ecx) {
goto loser;
}
/* encode safe contents */
p12ecx->innerBuf.p7eCx = innerP7ecx;
p12ecx->innerBuf.hmacCx = NULL;
p12ecx->innerBuf.numBytes = 0;
p12ecx->innerBuf.bufBytes = sizeof p12ecx->innerBuf.buf;
innerA1ecx = SEC_ASN1EncoderStart(safeInfo->safe,
sec_PKCS12SafeContentsTemplate,
sec_P12A1OutputCB_HmacP7Update,
&p12ecx->innerBuf);
if (!innerA1ecx) {
goto loser;
}
rv = SEC_ASN1EncoderUpdate(innerA1ecx, NULL, 0);
SEC_ASN1EncoderFinish(innerA1ecx);
sec_FlushPkcs12OutputBuffer(&p12ecx->innerBuf);
innerA1ecx = NULL;
if (rv != SECSuccess) {
goto loser;
}
/* finish up safe content info */
rv = SEC_PKCS7EncoderFinish(innerP7ecx, p12ecx->p12exp->pwfn,
p12ecx->p12exp->pwfnarg);
}
memset(&p12ecx->innerBuf, 0, sizeof p12ecx->innerBuf);
return SECSuccess;
loser:
if (innerP7ecx) {
SEC_PKCS7EncoderFinish(innerP7ecx, p12ecx->p12exp->pwfn,
p12ecx->p12exp->pwfnarg);
}
if (innerA1ecx) {
SEC_ASN1EncoderFinish(innerA1ecx);
}
memset(&p12ecx->innerBuf, 0, sizeof p12ecx->innerBuf);
return SECFailure;
}
/* finish the HMAC and encode the macData so that it can be
* encoded.
*/
static SECStatus
sec_Pkcs12FinishMac(sec_PKCS12EncoderContext *p12ecx)
{
SECItem hmac = { siBuffer, NULL, 0 };
SECStatus rv;
SGNDigestInfo *di = NULL;
void *dummy;
if (!p12ecx) {
return SECFailure;
}
/* make sure we are using password integrity mode */
if (!p12ecx->p12exp->integrityEnabled) {
return SECSuccess;
}
if (!p12ecx->p12exp->pwdIntegrity) {
return SECSuccess;
}
/* finish the hmac */
hmac.data = (unsigned char *)PORT_ZAlloc(SHA1_LENGTH);
if (!hmac.data) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
return SECFailure;
}
rv = PK11_DigestFinal(p12ecx->hmacCx, hmac.data, &hmac.len, SHA1_LENGTH);
if (rv != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* create the digest info */
di = SGN_CreateDigestInfo(p12ecx->p12exp->integrityInfo.pwdInfo.algorithm,
hmac.data, hmac.len);
if (!di) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
rv = SECFailure;
goto loser;
}
rv = SGN_CopyDigestInfo(p12ecx->arena, &p12ecx->mac.safeMac, di);
if (rv != SECSuccess) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
goto loser;
}
/* encode the mac data */
dummy = SEC_ASN1EncodeItem(p12ecx->arena, &p12ecx->pfx.encodedMacData,
&p12ecx->mac, sec_PKCS12MacDataTemplate);
if (!dummy) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
rv = SECFailure;
}
loser:
if (di) {
SGN_DestroyDigestInfo(di);
}
if (hmac.data) {
SECITEM_ZfreeItem(&hmac, PR_FALSE);
}
PK11_DestroyContext(p12ecx->hmacCx, PR_TRUE);
p12ecx->hmacCx = NULL;
return rv;
}
/* pfx notify function for ASN1 encoder.
* We want to stop encoding once we reach the authenticated safe.
* At that point, the encoder will be updated via streaming
* as the authenticated safe is encoded.
*/
static void
sec_pkcs12_encoder_pfx_notify(void *arg, PRBool before, void *dest, int real_depth)
{
sec_PKCS12EncoderContext *p12ecx;
if (!before) {
return;
}
/* look for authenticated safe */
p12ecx = (sec_PKCS12EncoderContext *)arg;
if (dest != &p12ecx->pfx.encodedAuthSafe) {
return;
}
SEC_ASN1EncoderSetTakeFromBuf(p12ecx->outerA1ecx);
SEC_ASN1EncoderSetStreaming(p12ecx->outerA1ecx);
SEC_ASN1EncoderClearNotifyProc(p12ecx->outerA1ecx);
}
/* SEC_PKCS12Encode
* Encodes the PFX item and returns it to the output function, via
* callback. the output function must be capable of multiple updates.
*
* p12exp - the export context
* output - the output function callback, will be called more than once,
* must be able to accept streaming data.
* outputarg - argument for the output callback.
*/
SECStatus
SEC_PKCS12Encode(SEC_PKCS12ExportContext *p12exp,
SEC_PKCS12EncoderOutputCallback output, void *outputarg)
{
sec_PKCS12EncoderContext *p12enc;
struct sec_pkcs12_encoder_output outInfo;
SECStatus rv;
if (!p12exp || !output) {
return SECFailure;
}
/* get the encoder context */
p12enc = sec_pkcs12_encoder_start_context(p12exp);
if (!p12enc) {
return SECFailure;
}
outInfo.outputfn = output;
outInfo.outputarg = outputarg;
/* set up PFX encoder, the "outer" encoder. Set it for streaming */
p12enc->outerA1ecx = SEC_ASN1EncoderStart(&p12enc->pfx,
sec_PKCS12PFXItemTemplate,
sec_P12A1OutputCB_Outer,
&outInfo);
if (!p12enc->outerA1ecx) {
PORT_SetError(SEC_ERROR_NO_MEMORY);
rv = SECFailure;
goto loser;
}
SEC_ASN1EncoderSetStreaming(p12enc->outerA1ecx);
SEC_ASN1EncoderSetNotifyProc(p12enc->outerA1ecx,
sec_pkcs12_encoder_pfx_notify, p12enc);
rv = SEC_ASN1EncoderUpdate(p12enc->outerA1ecx, NULL, 0);
if (rv != SECSuccess) {
rv = SECFailure;
goto loser;
}
/* set up asafe cinfo - the output of the encoder feeds the PFX encoder */
p12enc->middleP7ecx = SEC_PKCS7EncoderStart(p12enc->aSafeCinfo,
sec_P12P7OutputCB_CallA1Update,
p12enc->outerA1ecx, NULL);
if (!p12enc->middleP7ecx) {
rv = SECFailure;
goto loser;
}
/* encode asafe */
p12enc->middleBuf.p7eCx = p12enc->middleP7ecx;
p12enc->middleBuf.hmacCx = NULL;
p12enc->middleBuf.numBytes = 0;
p12enc->middleBuf.bufBytes = sizeof p12enc->middleBuf.buf;
/* Setup the "inner ASN.1 encoder for Authenticated Safes. */
if (p12enc->p12exp->integrityEnabled &&
p12enc->p12exp->pwdIntegrity) {
p12enc->middleBuf.hmacCx = p12enc->hmacCx;
}
p12enc->middleA1ecx = SEC_ASN1EncoderStart(&p12enc->p12exp->authSafe,
sec_PKCS12AuthenticatedSafeTemplate,
sec_P12A1OutputCB_HmacP7Update,
&p12enc->middleBuf);
if (!p12enc->middleA1ecx) {
rv = SECFailure;
goto loser;
}
SEC_ASN1EncoderSetStreaming(p12enc->middleA1ecx);
SEC_ASN1EncoderSetTakeFromBuf(p12enc->middleA1ecx);
/* encode each of the safes */
while (p12enc->currentSafe != p12enc->p12exp->safeInfoCount) {
sec_pkcs12_encoder_asafe_process(p12enc);
p12enc->currentSafe++;
}
SEC_ASN1EncoderClearTakeFromBuf(p12enc->middleA1ecx);
SEC_ASN1EncoderClearStreaming(p12enc->middleA1ecx);
SEC_ASN1EncoderUpdate(p12enc->middleA1ecx, NULL, 0);
SEC_ASN1EncoderFinish(p12enc->middleA1ecx);
p12enc->middleA1ecx = NULL;
sec_FlushPkcs12OutputBuffer(&p12enc->middleBuf);
/* finish the encoding of the authenticated safes */
rv = SEC_PKCS7EncoderFinish(p12enc->middleP7ecx, p12exp->pwfn,
p12exp->pwfnarg);
p12enc->middleP7ecx = NULL;
if (rv != SECSuccess) {
goto loser;
}
SEC_ASN1EncoderClearTakeFromBuf(p12enc->outerA1ecx);
SEC_ASN1EncoderClearStreaming(p12enc->outerA1ecx);
/* update the mac, if necessary */
rv = sec_Pkcs12FinishMac(p12enc);
if (rv != SECSuccess) {
goto loser;
}
/* finish encoding the pfx */
rv = SEC_ASN1EncoderUpdate(p12enc->outerA1ecx, NULL, 0);
SEC_ASN1EncoderFinish(p12enc->outerA1ecx);
p12enc->outerA1ecx = NULL;
loser:
sec_pkcs12_encoder_destroy_context(p12enc);
return rv;
}
void
SEC_PKCS12DestroyExportContext(SEC_PKCS12ExportContext *p12ecx)
{
int i = 0;
if (!p12ecx) {
return;
}
if (p12ecx->safeInfos) {
i = 0;
while (p12ecx->safeInfos[i] != NULL) {
if (p12ecx->safeInfos[i]->encryptionKey) {
PK11_FreeSymKey(p12ecx->safeInfos[i]->encryptionKey);
}
if (p12ecx->safeInfos[i]->cinfo) {
SEC_PKCS7DestroyContentInfo(p12ecx->safeInfos[i]->cinfo);
}
i++;
}
}
PK11_FreeSlot(p12ecx->slot);
PORT_FreeArena(p12ecx->arena, PR_TRUE);
}