static int readDsaPrivateKeyOld( INOUT STREAM *stream,
INOUT CONTEXT_INFO *contextInfoPtr )
{
CRYPT_ALGO_TYPE cryptAlgo;
PKC_INFO *dlpKey = contextInfoPtr->ctxPKC;
int dummy, status;
assert( isWritePtr( stream, sizeof( STREAM ) ) );
assert( isWritePtr( contextInfoPtr, sizeof( CONTEXT_INFO ) ) );
REQUIRES( contextInfoPtr->type == CONTEXT_PKC && \
contextInfoPtr->capabilityInfo->cryptAlgo == CRYPT_ALGO_DSA );
/* Skip the PKCS #8 wrapper */
readSequence( stream, NULL ); /* Outer wrapper */
readShortInteger( stream, NULL ); /* Version */
status = readAlgoIDparam( stream, &cryptAlgo, &dummy,
ALGOID_CLASS_PKC );
if( cryptStatusError( status ) || cryptAlgo != CRYPT_ALGO_DSA )
return( CRYPT_ERROR_BADDATA );
/* Read the DSA parameters if we haven't already got them via the
associated public key/certificate */
if( BN_is_zero( &dlpKey->dlpParam_p ) )
{
readSequence( stream, NULL ); /* Parameter wrapper */
status = readBignumChecked( stream, &dlpKey->dlpParam_p,
DLPPARAM_MIN_P, DLPPARAM_MAX_P,
NULL );
if( cryptStatusOK( status ) )
status = readBignumChecked( stream, &dlpKey->dlpParam_q,
DLPPARAM_MIN_Q, DLPPARAM_MAX_Q,
NULL );
if( cryptStatusOK( status ) )
status = readBignumChecked( stream, &dlpKey->dlpParam_g,
DLPPARAM_MIN_G, DLPPARAM_MAX_G,
NULL );
}
else
status = readUniversal( stream );
if( cryptStatusError( status ) )
return( status );
/* Read the DSA private key component */
status = readOctetStringHole( stream, NULL, 20, DEFAULT_TAG );
if( cryptStatusOK( status ) ) /* OCTET STRING encapsulation */
status = readBignum( stream, &dlpKey->dlpParam_x,
DLPPARAM_MIN_X, DLPPARAM_MAX_X,
&dlpKey->dlpParam_p );
return( status );
}
static int readCmsKek( INOUT STREAM *stream,
OUT QUERY_INFO *queryInfo )
{
long value;
int status;
assert( isWritePtr( stream, sizeof( STREAM ) ) );
assert( isWritePtr( queryInfo, sizeof( QUERY_INFO ) ) );
/* Clear return value */
memset( queryInfo, 0, sizeof( QUERY_INFO ) );
/* Read the header */
readConstructed( stream, NULL, CTAG_RI_KEKRI );
status = readShortInteger( stream, &value );
if( cryptStatusError( status ) )
return( status );
if( value != KEK_VERSION )
return( CRYPT_ERROR_BADDATA );
return( CRYPT_ERROR_NOTAVAIL );
}
static int readKeyDerivationInfo( INOUT STREAM *stream,
OUT QUERY_INFO *queryInfo )
{
long endPos, value;
int length, status;
assert( isWritePtr( stream, sizeof( STREAM ) ) );
assert( isWritePtr( queryInfo, sizeof( QUERY_INFO ) ) );
/* Clear return value */
memset( queryInfo, 0, sizeof( QUERY_INFO ) );
/* Read the outer wrapper and key derivation algorithm OID */
readConstructed( stream, NULL, CTAG_KK_DA );
status = readFixedOID( stream, OID_PBKDF2, sizeofOID( OID_PBKDF2 ) );
if( cryptStatusError( status ) )
return( status );
/* Read the PBKDF2 parameters, limiting the salt and iteration count to
sane values */
status = readSequence( stream, &length );
if( cryptStatusError( status ) )
return( status );
endPos = stell( stream ) + length;
readOctetString( stream, queryInfo->salt, &queryInfo->saltLength,
2, CRYPT_MAX_HASHSIZE );
status = readShortInteger( stream, &value );
if( cryptStatusError( status ) )
return( status );
if( value < 1 || value > MAX_KEYSETUP_ITERATIONS )
return( CRYPT_ERROR_BADDATA );
queryInfo->keySetupIterations = ( int ) value;
queryInfo->keySetupAlgo = CRYPT_ALGO_HMAC_SHA1;
if( stell( stream ) < endPos && \
sPeek( stream ) == BER_INTEGER )
{
/* There's an optional key length that may override the default
key size present, read it. Note that we compare the upper
bound to MAX_WORKING_KEYSIZE rather than CRYPT_MAX_KEYSIZE,
since this is a key used directly with an encryption algorithm
rather than a generic keying value that may be hashed down to
size */
status = readShortInteger( stream, &value );
if( cryptStatusError( status ) )
return( status );
if( value < MIN_KEYSIZE || value > MAX_WORKING_KEYSIZE )
return( CRYPT_ERROR_BADDATA );
queryInfo->keySize = ( int ) value;
}
if( stell( stream ) < endPos )
{
CRYPT_ALGO_TYPE prfAlgo;
/* There's a non-default hash algorithm ID present, read it */
status = readAlgoID( stream, &prfAlgo, ALGOID_CLASS_HASH );
if( cryptStatusError( status ) )
return( status );
queryInfo->keySetupAlgo = prfAlgo;
}
return( CRYPT_OK );
}
static int readConfigOption( INOUT STREAM *stream,
IN_HANDLE CRYPT_USER iCryptUser )
{
CRYPT_ATTRIBUTE_TYPE attributeType;
const BUILTIN_OPTION_INFO *builtinOptionInfoPtr;
MESSAGE_DATA msgData;
void *dataPtr DUMMY_INIT_PTR;
long optionCode;
int value, tag, length, status;
/* Read the wrapper and option index and map it to the actual option.
If we find an unknown index or one that shouldn't be writeable to
persistent storage, we skip it and continue. This is done to handle
new options that may have been added after this version of cryptlib
was built (for unknown indices) and because the stored configuration
options are an untrusted source so we have to check for attempts to
feed in bogus values (for non-writeable options) */
readSequence( stream, NULL );
status = readShortInteger( stream, &optionCode );
if( cryptStatusError( status ) )
return( status );
if( optionCode < 0 || optionCode > LAST_OPTION_INDEX )
{
/* Unknown option, ignore it */
return( readUniversal( stream ) );
}
builtinOptionInfoPtr = getBuiltinOptionInfoByCode( optionCode );
if( builtinOptionInfoPtr == NULL || \
builtinOptionInfoPtr->index < 0 || \
builtinOptionInfoPtr->index > LAST_OPTION_INDEX || \
builtinOptionInfoPtr->index == CRYPT_UNUSED )
{
/* Unknown option, ignore it */
return( readUniversal( stream ) );
}
attributeType = builtinOptionInfoPtr->option;
/* Read the option value and set the option. We don't treat a failure
to set the option as a problem since the user probably doesn't want
the entire system to fail because of a bad configuration option, and
in any case we'll fall back to a safe default value */
status = tag = peekTag( stream );
if( cryptStatusError( status ) )
return( status );
if( tag == BER_BOOLEAN || tag == BER_INTEGER )
{
/* It's a numeric value, read the appropriate type and try and set
the option */
if( tag == BER_BOOLEAN )
status = readBoolean( stream, &value );
else
{
long integer;
status = readShortInteger( stream, &integer );
if( cryptStatusOK( status ) )
value = ( int ) integer;
}
if( cryptStatusError( status ) )
return( status );
( void ) krnlSendMessage( iCryptUser, IMESSAGE_SETATTRIBUTE,
&value, attributeType );
return( CRYPT_OK );
}
/* It's a string value, set the option straight from the encoded data */
status = readGenericHole( stream, &length, 1, BER_STRING_UTF8 );
if( cryptStatusOK( status ) )
status = sMemGetDataBlock( stream, &dataPtr, length );
if( cryptStatusOK( status ) )
status = sSkip( stream, length, SSKIP_MAX );
if( cryptStatusError( status ) )
return( status );
setMessageData( &msgData, dataPtr, length );
( void ) krnlSendMessage( iCryptUser, IMESSAGE_SETATTRIBUTE_S,
&msgData, attributeType );
return( CRYPT_OK );
}
static int getObjectInfo( INOUT STREAM *stream,
OUT QUERY_INFO *queryInfo )
{
const long startPos = stell( stream );
long value;
int tag, length, status;
assert( isWritePtr( stream, sizeof( STREAM ) ) );
assert( isWritePtr( queryInfo, sizeof( QUERY_INFO ) ) );
/* Clear return value */
memset( queryInfo, 0, sizeof( QUERY_INFO ) );
/* We always need at least MIN_CRYPT_OBJECTSIZE more bytes to do
anything */
if( sMemDataLeft( stream ) < MIN_CRYPT_OBJECTSIZE )
return( CRYPT_ERROR_UNDERFLOW );
/* Get the type, length, and version information */
status = getStreamObjectLength( stream, &length );
if( cryptStatusError( status ) )
return( status );
queryInfo->formatType = CRYPT_FORMAT_CRYPTLIB;
queryInfo->size = length;
tag = peekTag( stream );
if( cryptStatusError( tag ) )
return( tag );
readGenericHole( stream, NULL, 16, tag );
status = readShortInteger( stream, &value );
if( cryptStatusError( status ) )
return( status );
queryInfo->version = value;
switch( tag )
{
case BER_SEQUENCE:
/* This could be a signature or a PKC-encrypted key, see what
follows */
switch( value )
{
case KEYTRANS_VERSION:
case KEYTRANS_EX_VERSION:
queryInfo->type = CRYPT_OBJECT_PKCENCRYPTED_KEY;
break;
case SIGNATURE_VERSION:
case SIGNATURE_EX_VERSION:
queryInfo->type = CRYPT_OBJECT_SIGNATURE;
break;
default:
return( CRYPT_ERROR_BADDATA );
}
if( value == KEYTRANS_VERSION || value == SIGNATURE_VERSION )
queryInfo->formatType = CRYPT_FORMAT_CMS;
break;
case MAKE_CTAG( CTAG_RI_KEYAGREE ):
/* It's CMS' wierd X9.42-inspired key agreement mechanism, we
can't do much with this (mind you neither can anyone else)
so we should probably really treat it as a
CRYPT_ERROR_BADDATA if we encounter it rather than just
ignoring it */
queryInfo->type = CRYPT_OBJECT_NONE;
DEBUG_DIAG(( "Found keyAgreeRecipientInfo" ));
assert( DEBUG_WARN );
break;
case MAKE_CTAG( CTAG_RI_PWRI ):
queryInfo->type = CRYPT_OBJECT_ENCRYPTED_KEY;
break;
default:
queryInfo->type = CRYPT_OBJECT_NONE;
if( tag > MAKE_CTAG( CTAG_RI_PWRI ) && \
tag <= MAKE_CTAG( CTAG_RI_MAX ) )
{
/* This is probably a new RecipientInfo type, skip it */
DEBUG_DIAG(( "Found unknown RecipientInfo %X", tag ));
assert( DEBUG_WARN );
break;
}
return( CRYPT_ERROR_BADDATA );
}
/* Reset the stream and make sure that all of the data is present */
sseek( stream, startPos );
return( sMemDataLeft( stream ) < queryInfo->size ? \
CRYPT_ERROR_UNDERFLOW : CRYPT_OK );
}
static int readKeyIdentifiers( INOUT STREAM *stream,
INOUT PKCS15_INFO *pkcs15infoPtr,
IN_LENGTH const int endPos )
{
int iterationCount, status;
assert( isWritePtr( stream, sizeof( STREAM ) ) );
assert( isWritePtr( pkcs15infoPtr, sizeof( PKCS15_INFO ) ) );
REQUIRES( endPos > 0 && endPos > stell( stream ) && \
endPos < MAX_INTLENGTH );
for( status = CRYPT_OK, iterationCount = 0;
cryptStatusOK( status ) && stell( stream ) < endPos && \
iterationCount < FAILSAFE_ITERATIONS_MED; iterationCount++ )
{
long value;
int payloadLength;
/* Read each identifier type and copy the useful ones into the PKCS
#15 information */
readSequence( stream, &payloadLength );
status = readShortInteger( stream, &value );
if( cryptStatusError( status ) )
return( status );
switch( value )
{
case PKCS15_KEYID_ISSUERANDSERIALNUMBER:
{
HASHFUNCTION_ATOMIC hashFunctionAtomic;
void *iAndSPtr = DUMMY_INIT_PTR;
int iAndSLength, hashSize;
/* If we've already got the iAndSID, use that version
instead */
if( pkcs15infoPtr->iAndSIDlength > 0 )
{
status = readUniversal( stream );
continue;
}
/* Hash the full issuerAndSerialNumber to get an iAndSID */
getHashAtomicParameters( CRYPT_ALGO_SHA1, 0,
&hashFunctionAtomic, &hashSize );
status = getStreamObjectLength( stream, &iAndSLength );
if( cryptStatusOK( status ) )
status = sMemGetDataBlock( stream, &iAndSPtr,
iAndSLength );
if( cryptStatusOK( status ) )
status = sSkip( stream, iAndSLength );
if( cryptStatusError( status ) )
return( status );
hashFunctionAtomic( pkcs15infoPtr->iAndSID, KEYID_SIZE,
iAndSPtr, iAndSLength );
pkcs15infoPtr->iAndSIDlength = hashSize;
break;
}
case PKCS15_KEYID_SUBJECTKEYIDENTIFIER:
status = readOctetString( stream, pkcs15infoPtr->keyID,
&pkcs15infoPtr->keyIDlength,
8, CRYPT_MAX_HASHSIZE );
break;
case PKCS15_KEYID_ISSUERANDSERIALNUMBERHASH:
/* If we've already got the iAndSID by hashing the
issuerAndSerialNumber, use that version instead */
if( pkcs15infoPtr->iAndSIDlength > 0 )
{
status = readUniversal( stream );
continue;
}
status = readOctetString( stream, pkcs15infoPtr->iAndSID,
&pkcs15infoPtr->iAndSIDlength,
KEYID_SIZE, KEYID_SIZE );
break;
case PKCS15_KEYID_ISSUERNAMEHASH:
status = readOctetString( stream, pkcs15infoPtr->issuerNameID,
&pkcs15infoPtr->issuerNameIDlength,
KEYID_SIZE, KEYID_SIZE );
break;
case PKCS15_KEYID_SUBJECTNAMEHASH:
status = readOctetString( stream, pkcs15infoPtr->subjectNameID,
&pkcs15infoPtr->subjectNameIDlength,
KEYID_SIZE, KEYID_SIZE );
break;
case PKCS15_KEYID_PGP2:
status = readOctetString( stream, pkcs15infoPtr->pgp2KeyID,
&pkcs15infoPtr->pgp2KeyIDlength,
PGP_KEYID_SIZE, PGP_KEYID_SIZE );
break;
case PKCS15_KEYID_OPENPGP:
status = readOctetString( stream, pkcs15infoPtr->openPGPKeyID,
&pkcs15infoPtr->openPGPKeyIDlength,
PGP_KEYID_SIZE, PGP_KEYID_SIZE );
break;
default:
status = readUniversal( stream );
}
}
if( iterationCount >= FAILSAFE_ITERATIONS_MED )
{
/* This could be either an internal error or some seriously
malformed data, since we can't tell without human intervention
we throw a debug exception but otherwise treat it as bad data */
DEBUG_DIAG(( "Encountered more than %d key IDs",
FAILSAFE_ITERATIONS_MED ));
assert( DEBUG_WARN );
return( CRYPT_ERROR_BADDATA );
}
return( status );
}
static int readEccPrivateKeyOld( INOUT STREAM *stream,
INOUT CONTEXT_INFO *contextInfoPtr )
{
CRYPT_ALGO_TYPE cryptAlgo;
PKC_INFO *eccKey = contextInfoPtr->ctxPKC;
long value;
int tag, length, status;
assert( isWritePtr( stream, sizeof( STREAM ) ) );
assert( isWritePtr( contextInfoPtr, sizeof( CONTEXT_INFO ) ) );
REQUIRES( contextInfoPtr->type == CONTEXT_PKC && \
contextInfoPtr->capabilityInfo->cryptAlgo == CRYPT_ALGO_ECDSA );
/* Read the ECC key components. These were never standardised in any
PKCS standard, nor in the PKCS #12 RFC. RFC 5915 "Elliptic Curve
Private Key Structure" specifies the format for PKCS #8 as:
ECPrivateKey ::= SEQUENCE {
version INTEGER (1),
privateKey OCTET STRING,
parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
publicKey [1] BIT STRING OPTIONAL
}
but this isn't what's present in encoded forms created by OpenSSL.
Instead it's:
ECSomething ::= SEQUENCE {
version INTEGER (0),
parameters SEQUENCE {
type OBJECT IDENTIFIER ecPublicKey,
namedCurve OBJECT IDENTIFIER
}
something OCTET STRING {
key ECPrivateKey -- As above
}
}
so we have to tunnel into this in order to find the PKCS #8-like
data that we're actually interested in.
Note that we can't use the ECC p value for a range check because it
hasn't been set yet, all that we have at this point is a curve ID */
readSequence( stream, NULL ); /* Outer wrapper */
status = readShortInteger( stream, &value );/* Version */
if( cryptStatusError( status ) || value != 0 )
return( CRYPT_ERROR_BADDATA );
status = readAlgoIDparam( stream, &cryptAlgo, &length,
ALGOID_CLASS_PKC );
if( cryptStatusError( status ) || cryptAlgo != CRYPT_ALGO_ECDSA )
return( CRYPT_ERROR_BADDATA );
readUniversal( stream ); /* Named curve */
readOctetStringHole( stream, NULL, MIN_PKCSIZE_ECC_THRESHOLD,
DEFAULT_TAG ); /* OCTET STRING hole wrapper */
readSequence( stream, NULL ); /* ECPrivateKey wrapper */
status = readShortInteger( stream, &value ); /* Version */
if( cryptStatusError( status ) || value != 1 )
return( CRYPT_ERROR_BADDATA );
/* We've finalled made it down to the private key value. At this point
we can't use readBignumTag() directly because it's designed to read
either standard INTEGERs (via DEFAULT_TAG) or context-specific tagged
items, so passing in a BER_OCTETSTRING will be interpreted as
[4] IMPLICIT INTEGER rather than an OCTET STRING-tagged integer. To
get around this we read the tag separately and tell readBignumTag()
to skip the tag read */
tag = readTag( stream );
if( cryptStatusError( tag ) || tag != BER_OCTETSTRING )
return( CRYPT_ERROR_BADDATA );
return( readBignumTag( stream, &eccKey->eccParam_d,
ECCPARAM_MIN_D, ECCPARAM_MAX_D, NULL,
NO_TAG ) );
}
static int readRsaPrivateKeyOld( INOUT STREAM *stream,
INOUT CONTEXT_INFO *contextInfoPtr )
{
CRYPT_ALGO_TYPE cryptAlgo;
PKC_INFO *rsaKey = contextInfoPtr->ctxPKC;
const int startPos = stell( stream );
int length, endPos, iterationCount, status;
assert( isWritePtr( stream, sizeof( STREAM ) ) );
assert( isWritePtr( contextInfoPtr, sizeof( CONTEXT_INFO ) ) );
REQUIRES( contextInfoPtr->type == CONTEXT_PKC && \
contextInfoPtr->capabilityInfo->cryptAlgo == CRYPT_ALGO_RSA );
/* Skip the PKCS #8 wrapper. When we read the OCTET STRING
encapsulation we use MIN_PKCSIZE_THRESHOLD rather than MIN_PKCSIZE
so that a too-short key will get to readBignumChecked(), which
returns an appropriate error code */
readSequence( stream, &length ); /* Outer wrapper */
readShortInteger( stream, NULL ); /* Version */
status = readAlgoID( stream, &cryptAlgo, ALGOID_CLASS_PKC );
if( cryptStatusError( status ) || cryptAlgo != CRYPT_ALGO_RSA )
return( CRYPT_ERROR_BADDATA );
status = readOctetStringHole( stream, NULL,
( 2 * MIN_PKCSIZE_THRESHOLD ) + \
( 5 * ( MIN_PKCSIZE_THRESHOLD / 2 ) ),
DEFAULT_TAG );
if( cryptStatusError( status ) ) /* OCTET STRING encapsulation */
return( status );
/* Read the header */
readSequence( stream, NULL );
status = readShortInteger( stream, NULL );
if( cryptStatusError( status ) )
return( status );
/* Read the RSA key components, skipping n and e if we've already got
them via the associated public key/certificate */
if( BN_is_zero( &rsaKey->rsaParam_n ) )
{
status = readBignumChecked( stream, &rsaKey->rsaParam_n,
RSAPARAM_MIN_N, RSAPARAM_MAX_N,
NULL );
if( cryptStatusOK( status ) )
status = readBignum( stream, &rsaKey->rsaParam_e,
RSAPARAM_MIN_E, RSAPARAM_MAX_E,
&rsaKey->rsaParam_n );
}
else
{
readUniversal( stream );
status = readUniversal( stream );
}
if( cryptStatusOK( status ) )
{
/* d isn't used so we skip it */
status = readUniversal( stream );
}
if( cryptStatusOK( status ) )
status = readBignum( stream, &rsaKey->rsaParam_p,
RSAPARAM_MIN_P, RSAPARAM_MAX_P,
&rsaKey->rsaParam_n );
if( cryptStatusOK( status ) )
status = readBignum( stream, &rsaKey->rsaParam_q,
RSAPARAM_MIN_Q, RSAPARAM_MAX_Q,
&rsaKey->rsaParam_n );
if( cryptStatusOK( status ) )
status = readBignum( stream, &rsaKey->rsaParam_exponent1,
RSAPARAM_MIN_EXP1, RSAPARAM_MAX_EXP1,
&rsaKey->rsaParam_n );
if( cryptStatusOK( status ) )
status = readBignum( stream, &rsaKey->rsaParam_exponent2,
RSAPARAM_MIN_EXP2, RSAPARAM_MAX_EXP2,
&rsaKey->rsaParam_n );
if( cryptStatusOK( status ) )
status = readBignum( stream, &rsaKey->rsaParam_u,
RSAPARAM_MIN_U, RSAPARAM_MAX_U,
&rsaKey->rsaParam_n );
if( cryptStatusError( status ) )
return( status );
/* Check whether there are any attributes present */
if( stell( stream ) >= startPos + length )
return( CRYPT_OK );
/* Read the attribute wrapper */
status = readConstructed( stream, &length, 0 );
if( cryptStatusError( status ) )
return( status );
endPos = stell( stream ) + length;
/* Read the collection of attributes. Unlike any other key-storage
format, PKCS #8 stores the key usage information as an X.509
attribute alongside the encrypted private key data so we have to
process whatever attributes may be present in order to find the
keyUsage (if there is any) in order to set the object action
permissions */
for( iterationCount = 0;
stell( stream ) < endPos && \
iterationCount < FAILSAFE_ITERATIONS_MED;
iterationCount++ )
{
BYTE oid[ MAX_OID_SIZE + 8 ];
int oidLength, actionFlags, value;
/* Read the attribute. Since there's only one attribute type that
we can use, we hardcode the read in here rather than performing a
general-purpose attribute read */
readSequence( stream, NULL );
status = readEncodedOID( stream, oid, MAX_OID_SIZE, &oidLength,
BER_OBJECT_IDENTIFIER );
if( cryptStatusError( status ) )
return( status );
/* If it's not a key-usage attribute, we can't do much with it */
if( oidLength != sizeofOID( OID_X509_KEYUSAGE ) || \
memcmp( oid, OID_X509_KEYUSAGE, oidLength ) )
{
status = readUniversal( stream );
if( cryptStatusError( status ) )
return( status );
continue;
}
/* Read the keyUsage attribute and convert it into cryptlib action
permissions */
readSet( stream, NULL );
status = readBitString( stream, &value );
if( cryptStatusError( status ) )
return( status );
actionFlags = ACTION_PERM_NONE;
if( value & ( KEYUSAGE_SIGN | KEYUSAGE_CA ) )
{
actionFlags |= MK_ACTION_PERM( MESSAGE_CTX_SIGN, \
ACTION_PERM_ALL ) | \
MK_ACTION_PERM( MESSAGE_CTX_SIGCHECK, \
ACTION_PERM_ALL );
}
if( value & KEYUSAGE_CRYPT )
{
actionFlags |= MK_ACTION_PERM( MESSAGE_CTX_ENCRYPT, \
ACTION_PERM_ALL ) | \
MK_ACTION_PERM( MESSAGE_CTX_DECRYPT, \
ACTION_PERM_ALL );
}
#if 0 /* 11/6/13 Windows sets these flags to what are effectively
gibberish values (dataEncipherment for a signing key,
digitalSignature for an encryption key) so in order
to be able to use the key we have to ignore the keyUsage
settings, in the same way that every other application
seems to */
if( actionFlags == ACTION_PERM_NONE )
return( CRYPT_ERROR_NOTAVAIL );
status = krnlSendMessage( contextInfoPtr->objectHandle,
IMESSAGE_SETATTRIBUTE, &actionFlags,
CRYPT_IATTRIBUTE_ACTIONPERMS );
if( cryptStatusError( status ) )
return( status );
#else
assert( actionFlags != ACTION_PERM_NONE ); /* Warn in debug mode */
#endif /* 0 */
}
ENSURES( iterationCount < FAILSAFE_ITERATIONS_MED );
return( CRYPT_OK );
}
static int readPkiHeader( INOUT STREAM *stream,
INOUT CMP_PROTOCOL_INFO *protocolInfo,
INOUT ERROR_INFO *errorInfo,
const BOOLEAN isServerInitialMessage )
{
int length, endPos, status;
assert( isWritePtr( stream, sizeof( STREAM ) ) );
assert( isWritePtr( protocolInfo, sizeof( CMP_PROTOCOL_INFO ) ) );
assert( isWritePtr( errorInfo, sizeof( ERROR_INFO ) ) );
/* Clear per-message state information */
protocolInfo->userIDchanged = protocolInfo->certIDchanged = \
protocolInfo->useMACreceive = FALSE;
protocolInfo->macInfoPos = CRYPT_ERROR;
protocolInfo->senderDNPtr = NULL;
protocolInfo->senderDNlength = 0;
protocolInfo->headerRead = FALSE;
/* Read the wrapper and skip the static information, which matches what
we sent and is protected by the MAC so there's little point in
looking at it */
status = readSequence( stream, &length );
if( cryptStatusError( status ) )
return( status );
endPos = stell( stream ) + length;
readShortInteger( stream, NULL ); /* Version */
if( !protocolInfo->isCryptlib )
{
/* The ID of the key used for integrity protection (or in general
the identity of the sender) can be specified either as the sender
DN or the senderKID or both, or in some cases even indirectly via
the transaction ID. With no real guidance as to which one to
use, implementors are using any of these options to identify the
key. Since we need to check that the integrity-protection key
that we're using is correct so that we can report a more
appropriate error than bad signature or bad data, we need to
remember the sender DN for later in case this is the only form of
key identification provided. Unfortunately since the sender DN
can't uniquely identify a certificate, if this is the only
identifier that we're given then the caller can still get a bad
signature error, yet another one of CMPs many wonderful features */
status = readConstructed( stream, &protocolInfo->senderDNlength, 4 );
if( cryptStatusOK( status ) && protocolInfo->senderDNlength > 0 )
{
status = sMemGetDataBlock( stream, &protocolInfo->senderDNPtr,
protocolInfo->senderDNlength );
if( cryptStatusOK( status ) )
status = readUniversal( stream );
}
}
else
{
/* cryptlib includes a proper certID so the whole signer
identification mess is avoided and we can ignore the sender DN */
status = readUniversal( stream ); /* Sender DN */
}
if( cryptStatusOK( status ) )
status = readUniversal( stream ); /* Recipient DN */
if( peekTag( stream ) == MAKE_CTAG( CTAG_PH_MESSAGETIME ) )
status = readUniversal( stream ); /* Message time */
if( cryptStatusError( status ) )
{
retExt( CRYPT_ERROR_BADDATA,
( CRYPT_ERROR_BADDATA, errorInfo,
"Invalid DN information in PKI header" ) );
}
if( peekTag( stream ) != MAKE_CTAG( CTAG_PH_PROTECTIONALGO ) )
{
/* The message was sent without integrity protection, report it as
a signature error rather than the generic bad data error that
we'd get from the following read */
retExt( CRYPT_ERROR_SIGNATURE,
( CRYPT_ERROR_SIGNATURE, errorInfo,
"Message was sent without integrity protection" ) );
}
status = readProtectionAlgo( stream, protocolInfo );
if( cryptStatusError( status ) )
{
retExt( status,
( status, errorInfo,
"Invalid integrity protection information in PKI "
"header" ) );
}
if( peekTag( stream ) == MAKE_CTAG( CTAG_PH_SENDERKID ) )
{ /* Sender protection keyID */
status = readUserID( stream, protocolInfo );
if( cryptStatusError( status ) )
{
retExt( status,
( status, errorInfo,
"Invalid PKI user ID in PKI header" ) );
}
}
else
{
/* If we're the server, the client must provide a PKI user ID in the
first message unless we got one in an earlier transaction */
if( isServerInitialMessage && protocolInfo->userIDsize <= 0 )
{
retExt( CRYPT_ERROR_BADDATA,
( CRYPT_ERROR_BADDATA, errorInfo,
"Missing PKI user ID in PKI header" ) );
}
}
if( peekTag( stream ) == MAKE_CTAG( CTAG_PH_RECIPKID ) )
readUniversal( stream ); /* Recipient protection keyID */
/* Record the transaction ID (which is effectively the nonce) or make
sure that it matches the one that we sent. There's no real need to
do an explicit duplicate check since a replay attempt will be
rejected as a duplicate by the certificate store and the locking
performed at that level makes it a much better place to catch
duplicates, but we do it anyway because it doesn't cost anything and
we can catch at least some problems a bit earlier */
status = readConstructed( stream, NULL, CTAG_PH_TRANSACTIONID );
if( cryptStatusError( status ) )
{
retExt( status,
( status, errorInfo,
"Missing transaction ID in PKI header" ) );
}
status = readTransactionID( stream, protocolInfo,
isServerInitialMessage );
if( cryptStatusError( status ) )
{
protocolInfo->pkiFailInfo = CMPFAILINFO_BADRECIPIENTNONCE;
retExt( status,
( status, errorInfo,
( status == CRYPT_ERROR_SIGNATURE ) ? \
"Returned message transaction ID doesn't match our "
"transaction ID" : \
"Invalid transaction ID in PKI header" ) );
}
/* Read the sender nonce, which becomes the new recipient nonce, and skip
the recipient nonce if there's one present. These values may be
absent, either because the other side doesn't implement them or
because they're not available, for example because it's sending a
response to an error that occurred before it could read the nonce from
a request. In any case we don't bother checking the nonce values
since the transaction ID serves the same purpose */
if( stell( stream ) < endPos && \
peekTag( stream ) == MAKE_CTAG( CTAG_PH_SENDERNONCE ) )
{
readConstructed( stream, NULL, CTAG_PH_SENDERNONCE );
status = readOctetString( stream, protocolInfo->recipNonce,
&protocolInfo->recipNonceSize,
4, CRYPT_MAX_HASHSIZE );
if( cryptStatusError( status ) )
{
protocolInfo->pkiFailInfo = CMPFAILINFO_BADSENDERNONCE;
retExt( status,
( status, errorInfo,
"Invalid sender nonce in PKI header" ) );
}
}
if( stell( stream ) < endPos && \
peekTag( stream ) == MAKE_CTAG( CTAG_PH_RECIPNONCE ) )
{
readConstructed( stream, NULL, CTAG_PH_RECIPNONCE );
status = readUniversal( stream );
if( cryptStatusError( status ) )
{
protocolInfo->pkiFailInfo = CMPFAILINFO_BADRECIPIENTNONCE;
retExt( status,
( status, errorInfo,
"Invalid recipient nonce in PKI header" ) );
}
}
/* Remember that we've successfully read enough of the header
information to generate a response */
protocolInfo->headerRead = TRUE;
/* Skip any further junk and process the general information if there is
any */
if( stell( stream ) < endPos && \
peekTag( stream ) == MAKE_CTAG( CTAG_PH_FREETEXT ) )
{
status = readUniversal( stream ); /* Junk */
if( cryptStatusError( status ) )
return( status );
}
if( stell( stream ) < endPos && \
peekTag( stream ) == MAKE_CTAG( CTAG_PH_GENERALINFO ) )
{
status = readGeneralInfo( stream, protocolInfo );
if( cryptStatusError( status ) )
{
retExt( status,
( status, errorInfo,
"Invalid generalInfo information in PKI header" ) );
}
}
return( CRYPT_OK );
}
