int EBC_Provider_MountToken(AB_PROVIDER *pro,
AB_USER *u,
GWEN_CRYPT_TOKEN **pCt,
const GWEN_CRYPT_TOKEN_CONTEXT **pCtx) {
EBC_PROVIDER *dp;
int rv;
GWEN_CRYPT_TOKEN *ct;
const GWEN_CRYPT_TOKEN_CONTEXT *ctx;
assert(pro);
dp=GWEN_INHERIT_GETDATA(AB_PROVIDER, EBC_PROVIDER, pro);
assert(dp);
/* get crypt token of signer */
rv=AB_Banking_GetCryptToken(AB_Provider_GetBanking(pro),
EBC_User_GetTokenType(u),
EBC_User_GetTokenName(u),
&ct);
if (rv) {
DBG_INFO(AQEBICS_LOGDOMAIN,
"Could not get crypt token for user \"%s\" (%d)",
AB_User_GetUserId(u), rv);
return rv;
}
/* make sure the right flags are set */
DBG_INFO(AQEBICS_LOGDOMAIN, "Adding mode \"direct sign\" to CryptToken");
GWEN_Crypt_Token_AddModes(ct, GWEN_CRYPT_TOKEN_MODE_DIRECT_SIGN);
/* open CryptToken if necessary */
if (!GWEN_Crypt_Token_IsOpen(ct)) {
rv=GWEN_Crypt_Token_Open(ct, 0, 0);
if (rv) {
DBG_INFO(AQEBICS_LOGDOMAIN,
"Could not open crypt token for user \"%s\" (%d)",
AB_User_GetUserId(u), rv);
return rv;
}
}
/* get context and key info */
ctx=GWEN_Crypt_Token_GetContext(ct,
EBC_User_GetTokenContextId(u),
0);
if (ctx==NULL) {
DBG_INFO(AQEBICS_LOGDOMAIN,
"Context %d not found on crypt token [%s:%s]",
EBC_User_GetTokenContextId(u),
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
return GWEN_ERROR_NOT_FOUND;
}
*pCt=ct;
*pCtx=ctx;
return 0;
}
GWEN_DIALOG *AH_Provider_GetNewCardUserDialog(AB_PROVIDER *pro)
{
int rv;
GWEN_BUFFER *mtypeName;
GWEN_BUFFER *mediumName;
GWEN_CRYPT_TOKEN *ct;
AB_BANKING *ab;
assert(pro);
ab=AB_Provider_GetBanking(pro);
assert(ab);
mtypeName=GWEN_Buffer_new(0, 64, 0, 1);
mediumName=GWEN_Buffer_new(0, 64, 0, 1);
rv=AB_Banking_CheckCryptToken(ab,
GWEN_Crypt_Token_Device_Card,
mtypeName,
mediumName);
if (rv<0) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "here (%d)", rv);
GWEN_Gui_ShowError(I18N("Chipcard Error"),
I18N("Error checking chip card (%d).\n"
"Maybe libchipcard or its plugins are not installed?"));
GWEN_Buffer_free(mediumName);
GWEN_Buffer_free(mtypeName);
return NULL;
}
rv=AB_Banking_GetCryptToken(AB_Provider_GetBanking(pro),
GWEN_Buffer_GetStart(mtypeName),
GWEN_Buffer_GetStart(mediumName),
&ct);
if (rv<0) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "here (%d)", rv);
GWEN_Buffer_free(mediumName);
GWEN_Buffer_free(mtypeName);
return NULL;
}
if (strcasecmp(GWEN_Buffer_GetStart(mtypeName), "ddvcard")==0) {
GWEN_DIALOG *dlg2;
DBG_WARN(0, "DDV card");
dlg2=AH_DdvCardDialog_new(pro, ct);
if (dlg2==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN, "here (no dialog)");
GWEN_Buffer_free(mediumName);
GWEN_Buffer_free(mtypeName);
return NULL;
}
GWEN_Dialog_SetWidgetText(dlg2, "", I18N("Create HBCI/FinTS DDV User"));
GWEN_Buffer_free(mediumName);
GWEN_Buffer_free(mtypeName);
return dlg2;
}
else if (strcasecmp(GWEN_Buffer_GetStart(mtypeName), "starcoscard")==0) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "STARCOS RSA card currently not supported by this dialog");
// TODO
}
else if (strcasecmp(GWEN_Buffer_GetStart(mtypeName), "zkacard")==0) {
GWEN_DIALOG *dlg2;
DBG_WARN(0, "ZKA RSA card");
dlg2=AH_ZkaCardDialog_new(pro, ct);
if (dlg2==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN, "here (no dialog)");
GWEN_Buffer_free(mediumName);
GWEN_Buffer_free(mtypeName);
return NULL;
}
GWEN_Dialog_SetWidgetText(dlg2, "", I18N("Create HBCI/FinTS ZKA RSA User"));
GWEN_Buffer_free(mediumName);
GWEN_Buffer_free(mtypeName);
return dlg2;
}
else {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Card type \"%s\" not yet supported",
GWEN_Buffer_GetStart(mtypeName));
}
GWEN_Buffer_free(mediumName);
GWEN_Buffer_free(mtypeName);
AB_Banking_ClearCryptTokenList(AB_Provider_GetBanking(pro));
return NULL;
}
int AH_Msg_VerifyRdh2(AH_MSG *hmsg, GWEN_DB_NODE *gr) {
AH_HBCI *h;
GWEN_LIST *sigheads;
GWEN_LIST *sigtails;
GWEN_DB_NODE *n;
int nonSigHeads;
int nSigheads;
unsigned int dataBegin;
char *dataStart;
unsigned int dataLength;
unsigned int i;
AB_USER *u;
GWEN_CRYPT_TOKEN *ct;
const GWEN_CRYPT_TOKEN_CONTEXT *ctx;
const GWEN_CRYPT_TOKEN_KEYINFO *ki;
uint32_t keyId;
int ksize;
int rv;
uint32_t gid;
assert(hmsg);
h=AH_Dialog_GetHbci(hmsg->dialog);
assert(h);
u=AH_Dialog_GetDialogOwner(hmsg->dialog);
assert(u);
gid=0;
/* get crypt token of signer */
rv=AB_Banking_GetCryptToken(AH_HBCI_GetBankingApi(h),
AH_User_GetTokenType(u),
AH_User_GetTokenName(u),
&ct);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not get crypt token for user \"%s\" (%d)",
AB_User_GetUserId(u), rv);
return rv;
}
/* open CryptToken if necessary */
if (!GWEN_Crypt_Token_IsOpen(ct)) {
GWEN_Crypt_Token_AddModes(ct, GWEN_CRYPT_TOKEN_MODE_DIRECT_SIGN);
rv=GWEN_Crypt_Token_Open(ct, 0, gid);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not open crypt token for user \"%s\" (%d)",
AB_User_GetUserId(u), rv);
return rv;
}
}
/* get context and key info */
ctx=GWEN_Crypt_Token_GetContext(ct,
AH_User_GetTokenContextId(u),
gid);
if (ctx==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Context %d not found on crypt token [%s:%s]",
AH_User_GetTokenContextId(u),
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
return GWEN_ERROR_NOT_FOUND;
}
/* let's go */
sigheads=GWEN_List_new();
/* enumerate signature heads */
nonSigHeads=0;
nSigheads=0;
n=GWEN_DB_GetFirstGroup(gr);
while(n) {
if (strcasecmp(GWEN_DB_GroupName(n), "SigHead")==0) {
/* found a signature head */
if (nonSigHeads) {
DBG_ERROR(AQHBCI_LOGDOMAIN,
"Found some unsigned parts at the beginning");
GWEN_List_free(sigheads);
return GWEN_ERROR_BAD_DATA;
}
GWEN_List_PushBack(sigheads, n);
nSigheads++;
}
else if (strcasecmp(GWEN_DB_GroupName(n), "MsgHead")!=0) {
if (nSigheads)
break;
nonSigHeads++;
}
n=GWEN_DB_GetNextGroup(n);
} /* while */
if (!n) {
if (nSigheads) {
DBG_ERROR(AQHBCI_LOGDOMAIN,
"Found Signature heads but no other segments");
GWEN_List_free(sigheads);
return GWEN_ERROR_BAD_DATA;
}
DBG_DEBUG(AQHBCI_LOGDOMAIN, "No signatures");
GWEN_List_free(sigheads);
return 0;
}
/* only now we need the verify key */
keyId=GWEN_Crypt_Token_Context_GetVerifyKeyId(ctx);
if (keyId==0) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"No verify key id on crypt token [%s:%s]",
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
return GWEN_ERROR_NOT_FOUND;
}
ki=GWEN_Crypt_Token_GetKeyInfo(ct,
keyId,
0xffffffff,
gid);
if (ki==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Keyinfo %04x not found on crypt token [%s:%s]",
keyId,
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
/* no longer return an error, it might be ok to not have a key info
* even if we do not propagate the error here the check functions will
* later find out that the signature is missing */
return 0;
}
ksize=GWEN_Crypt_Token_KeyInfo_GetKeySize(ki);
assert(ksize<=256);
/* store begin of signed data */
dataBegin=GWEN_DB_GetIntValue(n, "segment/pos", 0, 0);
if (!dataBegin) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "No position specifications in segment");
GWEN_List_free(sigheads);
return GWEN_ERROR_BAD_DATA;
}
/* now get first signature tail */
while(n) {
if (strcasecmp(GWEN_DB_GroupName(n), "SigTail")==0) {
unsigned int currpos;
/* found a signature tail */
currpos=GWEN_DB_GetIntValue(n, "segment/pos", 0, 0);
if (!currpos || dataBegin>currpos) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Bad position specification in Signature tail");
GWEN_List_free(sigheads);
return GWEN_ERROR_BAD_DATA;
}
dataLength=currpos-dataBegin;
break;
}
n=GWEN_DB_GetNextGroup(n);
} /* while */
if (!n) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "No signature tail found");
GWEN_List_free(sigheads);
return GWEN_ERROR_BAD_DATA;
}
sigtails=GWEN_List_new();
while(n) {
if (strcasecmp(GWEN_DB_GroupName(n), "SigTail")!=0)
break;
GWEN_List_PushBack(sigtails, n);
n=GWEN_DB_GetNextGroup(n);
} /* while */
if (!n) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Message tail expected");
GWEN_List_free(sigheads);
GWEN_List_free(sigtails);
return GWEN_ERROR_BAD_DATA;
}
if (strcasecmp(GWEN_DB_GroupName(n), "MsgTail")!=0) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Unexpected segment (msg tail expected)");
GWEN_List_free(sigheads);
GWEN_List_free(sigtails);
return GWEN_ERROR_BAD_DATA;
}
n=GWEN_DB_GetNextGroup(n);
if (n) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Unexpected segment (end expected)");
GWEN_List_free(sigheads);
GWEN_List_free(sigtails);
return GWEN_ERROR_BAD_DATA;
}
if (GWEN_List_GetSize(sigheads)!=
GWEN_List_GetSize(sigtails)) {
DBG_ERROR(AQHBCI_LOGDOMAIN,
"Number of signature heads (%d) does not match "
"number of signature tails (%d)",
GWEN_List_GetSize(sigheads),
GWEN_List_GetSize(sigtails));
GWEN_List_free(sigheads);
GWEN_List_free(sigtails);
return GWEN_ERROR_BAD_DATA;
}
/* ok, now verify all signatures */
dataStart=GWEN_Buffer_GetStart(hmsg->buffer)+dataBegin;
for (i=0; i< GWEN_List_GetSize(sigtails); i++) {
GWEN_DB_NODE *sighead;
GWEN_DB_NODE *sigtail;
const uint8_t *p;
uint32_t l;
int rv;
uint8_t hash[20];
const char *signerId;
/* get signature tail */
sigtail=(GWEN_DB_NODE*)GWEN_List_GetBack(sigtails);
/* get corresponding signature head */
sighead=(GWEN_DB_NODE*)GWEN_List_GetFront(sigheads);
if (!sighead || !sigtail) {
DBG_ERROR(AQHBCI_LOGDOMAIN,
"No signature head/tail left (internal error)");
GWEN_List_free(sigheads);
GWEN_List_free(sigtails);
return GWEN_ERROR_INTERNAL;
}
GWEN_List_PopBack(sigtails);
GWEN_List_PopFront(sigheads);
signerId=GWEN_DB_GetCharValue(sighead, "key/userid", 0,
I18N("unknown"));
/* some checks */
if (strcasecmp(GWEN_DB_GetCharValue(sighead, "ctrlref", 0, ""),
GWEN_DB_GetCharValue(sigtail, "ctrlref", 0, ""))!=0) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Non-matching signature tail");
GWEN_List_free(sigheads);
GWEN_List_free(sigtails);
return GWEN_ERROR_BAD_DATA;
}
/* hash signature head and data */
if (1) {
GWEN_MDIGEST *md;
/* hash sighead + data */
p=(const uint8_t*)GWEN_Buffer_GetStart(hmsg->buffer);
p+=GWEN_DB_GetIntValue(sighead,
"segment/pos",
0,
0);
l=GWEN_DB_GetIntValue(sighead,
"segment/length",
0,
0);
md=GWEN_MDigest_Rmd160_new();
rv=GWEN_MDigest_Begin(md);
if (rv==0)
/* digest signature head */
rv=GWEN_MDigest_Update(md, p, l);
if (rv==0)
/* digest data */
rv=GWEN_MDigest_Update(md, (const uint8_t*)dataStart, dataLength);
if (rv==0)
rv=GWEN_MDigest_End(md);
if (rv<0) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Hash error (%d)", rv);
GWEN_MDigest_free(md);
GWEN_List_free(sigheads);
GWEN_List_free(sigtails);
return rv;
}
memmove(hash,
GWEN_MDigest_GetDigestPtr(md),
GWEN_MDigest_GetDigestSize(md));
GWEN_MDigest_free(md);
}
/* verify signature */
p=GWEN_DB_GetBinValue(sigtail, "signature", 0, 0, 0, &l);
if (p && l) {
GWEN_CRYPT_PADDALGO *algo;
algo=GWEN_Crypt_PaddAlgo_new(GWEN_Crypt_PaddAlgoId_Iso9796_2);
GWEN_Crypt_PaddAlgo_SetPaddSize(algo, ksize);
rv=GWEN_Crypt_Token_Verify(ct, keyId,
algo,
hash, 20, p, l, 0, gid);
GWEN_Crypt_PaddAlgo_free(algo);
if (rv) {
if (rv==GWEN_ERROR_NO_KEY) {
DBG_ERROR(AQHBCI_LOGDOMAIN,
"Unable to verify signature of user \"%s\" (no key)",
signerId);
GWEN_Gui_ProgressLog(gid,
GWEN_LoggerLevel_Error,
I18N("Unable to verify signature (no key)"));
}
else {
GWEN_BUFFER *tbuf;
tbuf=GWEN_Buffer_new(0, 32, 0, 1);
if (rv==GWEN_ERROR_VERIFY) {
DBG_ERROR(AQHBCI_LOGDOMAIN,
"Invalid signature of user \"%s\"", signerId);
GWEN_Gui_ProgressLog(gid,
GWEN_LoggerLevel_Error,
I18N("Invalid signature!!!"));
GWEN_Buffer_AppendString(tbuf, "!");
}
else {
GWEN_Gui_ProgressLog(gid,
GWEN_LoggerLevel_Error,
I18N("Could not verify signature"));
DBG_ERROR(AQHBCI_LOGDOMAIN,
"Could not verify data with medium of user \"%s\" (%d)",
AB_User_GetUserId(u), rv);
GWEN_Buffer_AppendString(tbuf, "?");
}
GWEN_Buffer_AppendString(tbuf, signerId);
AH_Msg_AddSignerId(hmsg, GWEN_Buffer_GetStart(tbuf));
GWEN_Buffer_free(tbuf);
}
}
else {
DBG_INFO(AQHBCI_LOGDOMAIN, "Message signed by \"%s\"", signerId);
AH_Msg_AddSignerId(hmsg, signerId);
}
}
else {
DBG_DEBUG(AQHBCI_LOGDOMAIN, "No signature");
GWEN_List_free(sigheads);
GWEN_List_free(sigtails);
return GWEN_ERROR_BAD_DATA;
}
DBG_DEBUG(AQHBCI_LOGDOMAIN, "Verification done");
} /* for */
GWEN_List_free(sigheads);
GWEN_List_free(sigtails);
return 0;
}
int AH_Msg_DecryptRdh2(AH_MSG *hmsg, GWEN_DB_NODE *gr){
AH_HBCI *h;
GWEN_BUFFER *mbuf;
uint32_t l;
int rv;
const uint8_t *p;
GWEN_MSGENGINE *e;
AB_USER *u;
const char *peerId;
// uint32_t uFlags;
GWEN_CRYPT_TOKEN *ct;
const GWEN_CRYPT_TOKEN_CONTEXT *ctx;
const GWEN_CRYPT_TOKEN_KEYINFO *ki;
uint32_t keyId;
GWEN_CRYPT_KEY *sk=NULL;
uint8_t decKey[300];
GWEN_DB_NODE *nhead=NULL;
GWEN_DB_NODE *ndata=NULL;
const char *crypterId;
uint32_t gid;
assert(hmsg);
h=AH_Dialog_GetHbci(hmsg->dialog);
assert(h);
e=AH_Dialog_GetMsgEngine(hmsg->dialog);
assert(e);
GWEN_MsgEngine_SetMode(e, "rdh");
gid=0;
u=AH_Dialog_GetDialogOwner(hmsg->dialog);
// uFlags=AH_User_GetFlags(u);
peerId=AH_User_GetPeerId(u);
if (!peerId || *peerId==0)
peerId=AB_User_GetUserId(u);
/* get crypt token of signer */
rv=AB_Banking_GetCryptToken(AH_HBCI_GetBankingApi(h),
AH_User_GetTokenType(u),
AH_User_GetTokenName(u),
&ct);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not get crypt token for user \"%s\" (%d)",
AB_User_GetUserId(u), rv);
return rv;
}
/* open CryptToken if necessary */
if (!GWEN_Crypt_Token_IsOpen(ct)) {
GWEN_Crypt_Token_AddModes(ct, GWEN_CRYPT_TOKEN_MODE_DIRECT_SIGN);
rv=GWEN_Crypt_Token_Open(ct, 0, gid);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not open crypt token for user \"%s\" (%d)",
AB_User_GetUserId(u), rv);
return rv;
}
}
/* get context and key info */
ctx=GWEN_Crypt_Token_GetContext(ct,
AH_User_GetTokenContextId(u),
gid);
if (ctx==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Context %d not found on crypt token [%s:%s]",
AH_User_GetTokenContextId(u),
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
return GWEN_ERROR_NOT_FOUND;
}
keyId=GWEN_Crypt_Token_Context_GetDecipherKeyId(ctx);
ki=GWEN_Crypt_Token_GetKeyInfo(ct,
keyId,
0xffffffff,
gid);
if (ki==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Keyinfo %04x not found on crypt token [%s:%s]",
keyId,
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
return GWEN_ERROR_NOT_FOUND;
}
/* get encrypted session key */
nhead=GWEN_DB_GetGroup(gr,
GWEN_DB_FLAGS_DEFAULT |
GWEN_PATH_FLAGS_NAMEMUSTEXIST,
"CryptHead");
if (!nhead) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "No crypt head");
return GWEN_ERROR_BAD_DATA;
}
ndata=GWEN_DB_GetGroup(gr,
GWEN_DB_FLAGS_DEFAULT |
GWEN_PATH_FLAGS_NAMEMUSTEXIST,
"CryptData");
if (!ndata) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "No crypt data");
return GWEN_ERROR_BAD_DATA;
}
crypterId=GWEN_DB_GetCharValue(nhead, "key/userId", 0, I18N("unknown"));
p=GWEN_DB_GetBinValue(nhead,
"CryptAlgo/MsgKey",
0,
0,0,
&l);
if (p && l) {
uint32_t elen;
GWEN_CRYPT_PADDALGO *algo;
uint8_t encKey[300];
int ksize;
ksize=GWEN_Crypt_Token_KeyInfo_GetKeySize(ki);
if (ksize<l) {
DBG_WARN(AQHBCI_LOGDOMAIN, "Keyinfo keysize is smaller than size of transmitted key, adjusting");
ksize=l;
}
assert(ksize<=256);
/* fill encoded key with 0 */
memset(encKey, 0, sizeof(encKey));
memmove(encKey+(ksize-l), p, l);
algo=GWEN_Crypt_PaddAlgo_new(GWEN_Crypt_PaddAlgoId_None);
elen=sizeof(decKey);
rv=GWEN_Crypt_Token_Decipher(ct,
keyId,
algo,
encKey, ksize,
decKey,
&elen,
gid);
GWEN_Crypt_PaddAlgo_free(algo);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN, "here (%d)", rv);
return rv;
}
/* unpadd key (take right-handed 16 bytes) */
p=decKey+(elen-16);
sk=GWEN_Crypt_KeyDes3K_fromData(GWEN_Crypt_CryptMode_Cbc, 24,
p, 16);
if (sk==NULL) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Could not create DES key from data");
return GWEN_ERROR_BAD_DATA;
}
}
else {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Missing message key");
return GWEN_ERROR_BAD_DATA;
}
/* get encrypted data */
p=GWEN_DB_GetBinValue(ndata,
"CryptData",
0,
0,0,
&l);
if (!p || !l) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "No crypt data");
GWEN_Crypt_Key_free(sk);
return GWEN_ERROR_BAD_DATA;
}
/* decipher message with session key */
mbuf=GWEN_Buffer_new(0, l, 0, 1);
rv=GWEN_Crypt_Key_Decipher(sk,
(const uint8_t*)p, l,
(uint8_t*)GWEN_Buffer_GetPosPointer(mbuf),
&l);
GWEN_Crypt_Key_free(sk);
if (rv<0) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not decipher with DES session key (%d)",
rv);
GWEN_Buffer_free(mbuf);
return rv;
}
GWEN_Buffer_IncrementPos(mbuf, l);
GWEN_Buffer_AdjustUsedBytes(mbuf);
/* unpadd message */
rv=GWEN_Padd_UnpaddWithAnsiX9_23(mbuf);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Error unpadding message with ANSI X9.23 (%d)", rv);
GWEN_Buffer_free(mbuf);
return rv;
}
/* store crypter id */
AH_Msg_SetCrypterId(hmsg, crypterId);
/* store new buffer inside message */
GWEN_Buffer_free(hmsg->origbuffer);
hmsg->origbuffer=hmsg->buffer;
GWEN_Buffer_Rewind(mbuf);
hmsg->buffer=mbuf;
return 0;
}
int AH_Msg_EncryptRdh2(AH_MSG *hmsg) {
AH_HBCI *h;
GWEN_XMLNODE *node;
GWEN_DB_NODE *cfg;
GWEN_BUFFER *mbuf;
GWEN_BUFFER *hbuf;
uint32_t l;
int rv;
const char *p;
GWEN_MSGENGINE *e;
AB_USER *u;
const char *peerId;
// uint32_t uFlags;
GWEN_CRYPT_TOKEN *ct;
const GWEN_CRYPT_TOKEN_CONTEXT *ctx;
const GWEN_CRYPT_TOKEN_KEYINFO *ki;
uint32_t keyId;
GWEN_CRYPT_KEY *sk;
uint8_t encKey[300];
int encKeyLen;
uint32_t gid;
assert(hmsg);
h=AH_Dialog_GetHbci(hmsg->dialog);
assert(h);
e=AH_Dialog_GetMsgEngine(hmsg->dialog);
assert(e);
GWEN_MsgEngine_SetMode(e, "rdh");
gid=0;
u=AH_Dialog_GetDialogOwner(hmsg->dialog);
// uFlags=AH_User_GetFlags(u);
peerId=AH_User_GetPeerId(u);
if (!peerId || *peerId==0)
peerId=AB_User_GetUserId(u);
/* get crypt token of signer */
rv=AB_Banking_GetCryptToken(AH_HBCI_GetBankingApi(h),
AH_User_GetTokenType(u),
AH_User_GetTokenName(u),
&ct);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not get crypt token for user \"%s\" (%d)",
AB_User_GetUserId(u), rv);
return rv;
}
/* open CryptToken if necessary */
if (!GWEN_Crypt_Token_IsOpen(ct)) {
GWEN_Crypt_Token_AddModes(ct, GWEN_CRYPT_TOKEN_MODE_DIRECT_SIGN);
rv=GWEN_Crypt_Token_Open(ct, 0, gid);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not open crypt token for user \"%s\" (%d)",
AB_User_GetUserId(u), rv);
return rv;
}
}
/* get context and key info */
ctx=GWEN_Crypt_Token_GetContext(ct,
AH_User_GetTokenContextId(u),
gid);
if (ctx==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Context %d not found on crypt token [%s:%s]",
AH_User_GetTokenContextId(u),
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
return GWEN_ERROR_NOT_FOUND;
}
keyId=GWEN_Crypt_Token_Context_GetEncipherKeyId(ctx);
ki=GWEN_Crypt_Token_GetKeyInfo(ct,
keyId,
0xffffffff,
gid);
if (ki==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Keyinfo %04x not found on crypt token [%s:%s]",
keyId,
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
return GWEN_ERROR_NOT_FOUND;
}
rv=GWEN_Padd_PaddWithAnsiX9_23(hmsg->buffer);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Error padding message with ANSI X9.23 (%d)", rv);
return rv;
}
/* create session key */
sk=GWEN_Crypt_KeyDes3K_Generate(GWEN_Crypt_CryptMode_Cbc, 24, 2);
if (sk==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Could not generate DES key");
return GWEN_ERROR_INTERNAL;
}
/* encrypt message with that session key */
mbuf=GWEN_Buffer_new(0, GWEN_Buffer_GetUsedBytes(hmsg->buffer), 0, 1);
l=GWEN_Buffer_GetUsedBytes(hmsg->buffer);
rv=GWEN_Crypt_Key_Encipher(sk,
(uint8_t*)GWEN_Buffer_GetStart(hmsg->buffer),
GWEN_Buffer_GetUsedBytes(hmsg->buffer),
(uint8_t*)GWEN_Buffer_GetPosPointer(mbuf),
&l);
if (rv<0) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not encipher with DES session key (%d)",
rv);
GWEN_Buffer_free(mbuf);
GWEN_Crypt_Key_free(sk);
return rv;
}
GWEN_Buffer_IncrementPos(mbuf, l);
GWEN_Buffer_AdjustUsedBytes(mbuf);
/* encrypt session key */
if (1) {
uint32_t elen;
GWEN_CRYPT_PADDALGO *algo;
algo=GWEN_Crypt_PaddAlgo_new(GWEN_Crypt_PaddAlgoId_LeftZero);
GWEN_Crypt_PaddAlgo_SetPaddSize(algo, GWEN_Crypt_Token_KeyInfo_GetKeySize(ki));
elen=sizeof(encKey);
rv=GWEN_Crypt_Token_Encipher(ct,
keyId,
algo,
GWEN_Crypt_KeyDes3K_GetKeyDataPtr(sk),
16,
encKey,
&elen,
gid);
GWEN_Crypt_PaddAlgo_free(algo);
if (rv<0) {
DBG_INFO(AQHBCI_LOGDOMAIN, "here (%d)", rv);
GWEN_Buffer_free(mbuf);
GWEN_Crypt_Key_free(sk);
return rv;
}
encKeyLen=elen;
}
GWEN_Crypt_Key_free(sk);
/* create crypt head */
node=GWEN_MsgEngine_FindNodeByPropertyStrictProto(e,
"SEG",
"id",
0,
"CryptHead");
if (!node) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Segment \"CryptHead\" not found");
GWEN_Buffer_free(mbuf);
GWEN_Crypt_Key_free(sk);
return GWEN_ERROR_INTERNAL;
}
/* create CryptHead */
cfg=GWEN_DB_Group_new("crypthead");
GWEN_DB_SetIntValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"head/seq", 998);
rv=AH_MsgRdh_PrepareCryptoSeg2(hmsg, u, ki, cfg, 1, 0);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN, "here (%d)", rv);
GWEN_DB_Group_free(cfg);
GWEN_Buffer_free(mbuf);
return rv;
}
/* store system id */
if (hmsg->noSysId) {
GWEN_DB_SetCharValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"SecDetails/SecId", "0");
}
else {
p=AH_User_GetSystemId(u);
if (p==NULL)
p=GWEN_Crypt_Token_Context_GetSystemId(ctx);
if (p)
GWEN_DB_SetCharValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"SecDetails/SecId", p);
else {
DBG_INFO(AQHBCI_LOGDOMAIN,
"No System id on RDH medium, using default");
GWEN_DB_SetCharValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"SecDetails/SecId", "0");
}
}
/* store encrypted message key */
GWEN_DB_SetBinValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"CryptAlgo/MsgKey",
encKey,
encKeyLen);
hbuf=GWEN_Buffer_new(0, 256+GWEN_Buffer_GetUsedBytes(mbuf), 0, 1);
rv=GWEN_MsgEngine_CreateMessageFromNode(e,
node,
hbuf,
cfg);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Could not create CryptHead (%d)", rv);
GWEN_Buffer_free(hbuf);
GWEN_DB_Group_free(cfg);
GWEN_Buffer_free(mbuf);
return rv;
}
GWEN_DB_Group_free(cfg);
/* create cryptdata */
cfg=GWEN_DB_Group_new("cryptdata");
GWEN_DB_SetIntValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"head/seq", 999);
GWEN_DB_SetBinValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"cryptdata",
GWEN_Buffer_GetStart(mbuf),
GWEN_Buffer_GetUsedBytes(mbuf));
GWEN_Buffer_free(mbuf);
node=GWEN_MsgEngine_FindNodeByPropertyStrictProto(e,
"SEG",
"id",
0,
"CryptData");
if (!node) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Segment \"CryptData\"not found");
GWEN_Buffer_free(hbuf);
GWEN_DB_Group_free(cfg);
return -1;
}
rv=GWEN_MsgEngine_CreateMessageFromNode(e,
node,
hbuf,
cfg);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Could not create CryptData (%d)", rv);
GWEN_Buffer_free(hbuf);
GWEN_DB_Group_free(cfg);
return rv;
}
/* replace existing buffer by encrypted one */
GWEN_Buffer_free(hmsg->buffer);
hmsg->buffer=hbuf;
GWEN_DB_Group_free(cfg);
return 0;
}
int AH_Msg_SignRdh2(AH_MSG *hmsg,
AB_USER *su,
GWEN_BUFFER *rawBuf,
const char *signer) {
AH_HBCI *h;
GWEN_XMLNODE *node;
GWEN_DB_NODE *cfg;
GWEN_BUFFER *sigbuf;
GWEN_BUFFER *hbuf;
unsigned int l;
int rv;
char ctrlref[15];
const char *p;
GWEN_MSGENGINE *e;
uint32_t uFlags;
GWEN_CRYPT_TOKEN *ct;
const GWEN_CRYPT_TOKEN_CONTEXT *ctx;
const GWEN_CRYPT_TOKEN_KEYINFO *ki;
uint32_t keyId;
uint32_t gid;
assert(hmsg);
h=AH_Dialog_GetHbci(hmsg->dialog);
assert(h);
e=AH_Dialog_GetMsgEngine(hmsg->dialog);
assert(e);
GWEN_MsgEngine_SetMode(e, "rdh");
gid=0;
uFlags=AH_User_GetFlags(su);
/* get crypt token of signer */
rv=AB_Banking_GetCryptToken(AH_HBCI_GetBankingApi(h),
AH_User_GetTokenType(su),
AH_User_GetTokenName(su),
&ct);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not get crypt token for user \"%s\" (%d)",
AB_User_GetUserId(su), rv);
return rv;
}
/* open CryptToken if necessary */
if (!GWEN_Crypt_Token_IsOpen(ct)) {
GWEN_Crypt_Token_AddModes(ct, GWEN_CRYPT_TOKEN_MODE_DIRECT_SIGN);
rv=GWEN_Crypt_Token_Open(ct, 0, gid);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Could not open crypt token for user \"%s\" (%d)",
AB_User_GetUserId(su), rv);
return rv;
}
}
/* get context and key info */
ctx=GWEN_Crypt_Token_GetContext(ct,
AH_User_GetTokenContextId(su),
gid);
if (ctx==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Context %d not found on crypt token [%s:%s]",
AH_User_GetTokenContextId(su),
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
return GWEN_ERROR_NOT_FOUND;
}
keyId=GWEN_Crypt_Token_Context_GetSignKeyId(ctx);
ki=GWEN_Crypt_Token_GetKeyInfo(ct,
keyId,
0xffffffff,
gid);
if (ki==NULL) {
DBG_INFO(AQHBCI_LOGDOMAIN,
"Keyinfo %04x not found on crypt token [%s:%s]",
keyId,
GWEN_Crypt_Token_GetTypeName(ct),
GWEN_Crypt_Token_GetTokenName(ct));
return GWEN_ERROR_NOT_FOUND;
}
node=GWEN_MsgEngine_FindNodeByPropertyStrictProto(e,
"SEG",
"id",
0,
"SigHead");
if (!node) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Segment \"SigHead\" not found");
return GWEN_ERROR_INTERNAL;
}
/* prepare config for segment */
cfg=GWEN_DB_Group_new("sighead");
rv=AH_MsgRdh_PrepareCryptoSeg2(hmsg, su, ki, cfg, 0, 1);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN, "here (%d)", rv);
GWEN_DB_Group_free(cfg);
return rv;
}
/* set expected signer */
if (!(uFlags & AH_USER_FLAGS_BANK_DOESNT_SIGN)) {
const char *remoteId;
remoteId=AH_User_GetPeerId(su);
if (!remoteId || *remoteId==0)
remoteId=AB_User_GetUserId(su);
assert(remoteId);
assert(*remoteId);
DBG_DEBUG(AQHBCI_LOGDOMAIN,
"Expecting \"%s\" to sign the response",
remoteId);
AH_Msg_SetExpectedSigner(hmsg, remoteId);
}
/* store system id */
if (hmsg->noSysId) {
GWEN_DB_SetCharValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"SecDetails/SecId", "0");
}
else {
p=AH_User_GetSystemId(su);
if (p==NULL)
p=GWEN_Crypt_Token_Context_GetSystemId(ctx);
if (p)
GWEN_DB_SetCharValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"SecDetails/SecId", p);
else {
GWEN_DB_SetCharValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"SecDetails/SecId", "0");
}
}
/* retrieve control reference for sigtail (to be used later) */
p=GWEN_DB_GetCharValue(cfg, "ctrlref", 0, "");
if (strlen(p)>=sizeof(ctrlref)) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Control reference too long (14 bytes maximum)");
GWEN_DB_Group_free(cfg);
return -1;
}
strcpy(ctrlref, p);
/* create SigHead */
hbuf=GWEN_Buffer_new(0, 128+GWEN_Buffer_GetUsedBytes(rawBuf), 0, 1);
GWEN_DB_SetIntValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"head/seq", hmsg->firstSegment-1);
GWEN_DB_SetIntValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"signseq",
GWEN_Crypt_Token_KeyInfo_GetSignCounter(ki));
/* create signature head segment */
rv=GWEN_MsgEngine_CreateMessageFromNode(e, node, hbuf, cfg);
GWEN_DB_Group_free(cfg);
cfg=0;
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Could not create SigHead");
GWEN_Buffer_free(hbuf);
return rv;
}
/* remember size of sighead for now */
l=GWEN_Buffer_GetUsedBytes(hbuf);
/* add raw data to to-sign data buffer */
GWEN_Buffer_AppendBuffer(hbuf, rawBuf);
/* sign message */
sigbuf=GWEN_Buffer_new(0, 512, 0, 1);
if (1) {
uint32_t signLen;
GWEN_CRYPT_PADDALGO *algo;
GWEN_MDIGEST *md;
uint32_t seq;
/* hash sighead + data */
md=GWEN_MDigest_Rmd160_new();
rv=GWEN_MDigest_Begin(md);
if (rv==0)
rv=GWEN_MDigest_Update(md,
(uint8_t*)GWEN_Buffer_GetStart(hbuf),
GWEN_Buffer_GetUsedBytes(hbuf));
if (rv==0)
rv=GWEN_MDigest_End(md);
if (rv<0) {
DBG_ERROR(AQHBCI_LOGDOMAIN, "Hash error (%d)", rv);
GWEN_MDigest_free(md);
GWEN_Buffer_free(sigbuf);
GWEN_Buffer_free(hbuf);
return rv;
}
/* sign hash */
algo=GWEN_Crypt_PaddAlgo_new(GWEN_Crypt_PaddAlgoId_Iso9796_2);
GWEN_Crypt_PaddAlgo_SetPaddSize(algo, GWEN_Crypt_Token_KeyInfo_GetKeySize(ki));
signLen=GWEN_Buffer_GetMaxUnsegmentedWrite(sigbuf);
rv=GWEN_Crypt_Token_Sign(ct, keyId,
algo,
GWEN_MDigest_GetDigestPtr(md),
GWEN_MDigest_GetDigestSize(md),
(uint8_t*)GWEN_Buffer_GetPosPointer(sigbuf),
&signLen,
&seq,
gid);
GWEN_Crypt_PaddAlgo_free(algo);
GWEN_MDigest_free(md);
if (rv) {
DBG_ERROR(AQHBCI_LOGDOMAIN,
"Could not sign data with medium of user \"%s\" (%d)",
AB_User_GetUserId(su), rv);
GWEN_Buffer_free(sigbuf);
GWEN_Buffer_free(hbuf);
return rv;
}
GWEN_Buffer_IncrementPos(sigbuf, signLen);
GWEN_Buffer_AdjustUsedBytes(sigbuf);
}
DBG_DEBUG(AQHBCI_LOGDOMAIN, "Signing done");
/* insert new SigHead at beginning of message buffer */
DBG_DEBUG(AQHBCI_LOGDOMAIN, "Inserting signature head");
GWEN_Buffer_Rewind(hmsg->buffer);
GWEN_Buffer_InsertBytes(hmsg->buffer, GWEN_Buffer_GetStart(hbuf), l);
/* create sigtail */
DBG_DEBUG(AQHBCI_LOGDOMAIN, "Completing signature tail");
cfg=GWEN_DB_Group_new("sigtail");
GWEN_Buffer_Reset(hbuf);
GWEN_DB_SetIntValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"head/seq", hmsg->lastSegment+1);
/* store to DB */
GWEN_DB_SetBinValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"signature",
GWEN_Buffer_GetStart(sigbuf),
GWEN_Buffer_GetUsedBytes(sigbuf));
GWEN_Buffer_free(sigbuf);
GWEN_DB_SetCharValue(cfg, GWEN_DB_FLAGS_DEFAULT,
"ctrlref", ctrlref);
/* get node */
node=GWEN_MsgEngine_FindNodeByPropertyStrictProto(e,
"SEG",
"id",
0,
"SigTail");
if (!node) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Segment \"SigTail\"not found");
GWEN_Buffer_free(hbuf);
GWEN_DB_Group_free(cfg);
return -1;
}
rv=GWEN_MsgEngine_CreateMessageFromNode(e, node, hbuf, cfg);
if (rv) {
DBG_INFO(AQHBCI_LOGDOMAIN, "Could not create SigTail");
GWEN_Buffer_free(hbuf);
GWEN_DB_Group_free(cfg);
return -1;
}
/* append sigtail */
DBG_DEBUG(AQHBCI_LOGDOMAIN, "Appending signature tail");
if (GWEN_Buffer_AppendBuffer(hmsg->buffer, hbuf)) {
DBG_INFO(AQHBCI_LOGDOMAIN, "here");
GWEN_Buffer_free(hbuf);
GWEN_DB_Group_free(cfg);
return -1;
}
DBG_DEBUG(AQHBCI_LOGDOMAIN, "Appending signature tail: done");
GWEN_Buffer_free(hbuf);
GWEN_DB_Group_free(cfg);
/* adjust segment numbers (for next signature and message tail */
hmsg->firstSegment--;
hmsg->lastSegment++;
return 0;
}
