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crypt32: Separate decoding data from finalizing (hashing or signing) it.

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This commit is contained in:
Juan Lang 2008-08-20 16:29:06 -07:00 committed by Alexandre Julliard
parent 9db120d015
commit 0fbef45f55
1 changed files with 106 additions and 78 deletions
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184
dlls/crypt32/msg.c
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@ -1631,54 +1631,7 @@ static BOOL CDecodeMsg_DecodeSignedContent(CDecodeMsg *msg,
CRYPT_DECODE_ALLOC_FLAG, NULL, (CRYPT_SIGNED_INFO *)&signedInfo,
&size);
if (ret)
{
DWORD i;
msg->u.signed_data.info = signedInfo;
ret = CSignedMsgData_AllocateHandles(&msg->u.signed_data);
for (i = 0; ret && i < msg->u.signed_data.info->cSignerInfo; i++)
ret = CSignedMsgData_ConstructSignerHandles(&msg->u.signed_data, i,
msg->crypt_prov);
if (ret)
{
CRYPT_DATA_BLOB *content;
/* Now that we have all the content, update the hash handles with
* it. If the message is a detached message, the content is stored
* in msg->detached_data rather than in the signed message's
* content.
*/
if (msg->base.open_flags & CMSG_DETACHED_FLAG)
content = &msg->detached_data;
else
content = &msg->u.signed_data.info->content.Content;
if (content->cbData)
{
/* If the message is not detached, have to decode the message's
* content if the type is szOID_RSA_data.
*/
if (!(msg->base.open_flags & CMSG_DETACHED_FLAG) &&
!strcmp(msg->u.signed_data.info->content.pszObjId,
szOID_RSA_data))
{
CRYPT_DATA_BLOB *blob;
ret = CryptDecodeObjectEx(X509_ASN_ENCODING,
X509_OCTET_STRING, content->pbData, content->cbData,
CRYPT_DECODE_ALLOC_FLAG, NULL, (LPBYTE)&blob, &size);
if (ret)
{
ret = CSignedMsgData_Update(&msg->u.signed_data,
blob->pbData, blob->cbData, TRUE, Verify);
LocalFree(blob);
}
}
else
ret = CSignedMsgData_Update(&msg->u.signed_data,
content->pbData, content->cbData, TRUE, Verify);
}
}
}
return ret;
}
@ -1743,6 +1696,104 @@ static BOOL CDecodeMsg_DecodeContent(CDecodeMsg *msg, CRYPT_DER_BLOB *blob,
return ret;
}
static BOOL CDecodeMsg_FinalizeHashedContent(CDecodeMsg *msg,
CRYPT_DER_BLOB *blob)
{
CRYPT_ALGORITHM_IDENTIFIER *hashAlgoID = NULL;
DWORD size = 0;
ALG_ID algID = 0;
BOOL ret;
CryptMsgGetParam(msg, CMSG_HASH_ALGORITHM_PARAM, 0, NULL, &size);
hashAlgoID = CryptMemAlloc(size);
ret = CryptMsgGetParam(msg, CMSG_HASH_ALGORITHM_PARAM, 0, hashAlgoID,
&size);
if (ret)
algID = CertOIDToAlgId(hashAlgoID->pszObjId);
ret = CryptCreateHash(msg->crypt_prov, algID, 0, 0, &msg->u.hash);
if (ret)
{
CRYPT_DATA_BLOB content;
ret = ContextPropertyList_FindProperty(msg->properties,
CMSG_CONTENT_PARAM, &content);
if (ret)
ret = CryptHashData(msg->u.hash, content.pbData, content.cbData, 0);
}
CryptMemFree(hashAlgoID);
return ret;
}
static BOOL CDecodeMsg_FinalizeSignedContent(CDecodeMsg *msg,
CRYPT_DER_BLOB *blob)
{
BOOL ret;
DWORD i, size;
ret = CSignedMsgData_AllocateHandles(&msg->u.signed_data);
for (i = 0; ret && i < msg->u.signed_data.info->cSignerInfo; i++)
ret = CSignedMsgData_ConstructSignerHandles(&msg->u.signed_data, i,
msg->crypt_prov);
if (ret)
{
CRYPT_DATA_BLOB *content;
/* Now that we have all the content, update the hash handles with
* it. If the message is a detached message, the content is stored
* in msg->detached_data rather than in the signed message's
* content.
*/
if (msg->base.open_flags & CMSG_DETACHED_FLAG)
content = &msg->detached_data;
else
content = &msg->u.signed_data.info->content.Content;
if (content->cbData)
{
/* If the message is not detached, have to decode the message's
* content if the type is szOID_RSA_data.
*/
if (!(msg->base.open_flags & CMSG_DETACHED_FLAG) &&
!strcmp(msg->u.signed_data.info->content.pszObjId,
szOID_RSA_data))
{
CRYPT_DATA_BLOB *blob;
ret = CryptDecodeObjectEx(X509_ASN_ENCODING,
X509_OCTET_STRING, content->pbData, content->cbData,
CRYPT_DECODE_ALLOC_FLAG, NULL, (LPBYTE)&blob, &size);
if (ret)
{
ret = CSignedMsgData_Update(&msg->u.signed_data,
blob->pbData, blob->cbData, TRUE, Verify);
LocalFree(blob);
}
}
else
ret = CSignedMsgData_Update(&msg->u.signed_data,
content->pbData, content->cbData, TRUE, Verify);
}
}
return ret;
}
static BOOL CDecodeMsg_FinalizeContent(CDecodeMsg *msg, CRYPT_DER_BLOB *blob)
{
BOOL ret = FALSE;
switch (msg->type)
{
case CMSG_HASHED:
ret = CDecodeMsg_FinalizeHashedContent(msg, blob);
break;
case CMSG_SIGNED:
ret = CDecodeMsg_FinalizeSignedContent(msg, blob);
break;
default:
ret = TRUE;
}
return ret;
}
static BOOL CDecodeMsg_Update(HCRYPTMSG hCryptMsg, const BYTE *pbData,
DWORD cbData, BOOL fFinal)
{
@ -1815,8 +1866,14 @@ static BOOL CDecodeMsg_Update(HCRYPTMSG hCryptMsg, const BYTE *pbData,
}
}
}
if (ret && msg->base.state == MsgStateFinalized)
if (ret &&
((msg->base.open_flags & CMSG_DETACHED_FLAG && msg->base.state ==
MsgStateDataFinalized) ||
(!(msg->base.open_flags & CMSG_DETACHED_FLAG) && msg->base.state ==
MsgStateFinalized)))
ret = CDecodeMsg_DecodeContent(msg, &msg->msg_data, msg->type);
if (ret && msg->base.state == MsgStateFinalized)
ret = CDecodeMsg_FinalizeContent(msg, &msg->msg_data);
return ret;
}
@ -1847,36 +1904,7 @@ static BOOL CDecodeHashMsg_GetParam(CDecodeMsg *msg, DWORD dwParamType,
break;
}
case CMSG_COMPUTED_HASH_PARAM:
if (!msg->u.hash)
{
CRYPT_ALGORITHM_IDENTIFIER *hashAlgoID = NULL;
DWORD size = 0;
ALG_ID algID = 0;
CryptMsgGetParam(msg, CMSG_HASH_ALGORITHM_PARAM, 0, NULL, &size);
hashAlgoID = CryptMemAlloc(size);
ret = CryptMsgGetParam(msg, CMSG_HASH_ALGORITHM_PARAM, 0,
hashAlgoID, &size);
if (ret)
algID = CertOIDToAlgId(hashAlgoID->pszObjId);
ret = CryptCreateHash(msg->crypt_prov, algID, 0, 0, &msg->u.hash);
if (ret)
{
CRYPT_DATA_BLOB content;
ret = ContextPropertyList_FindProperty(msg->properties,
CMSG_CONTENT_PARAM, &content);
if (ret)
ret = CryptHashData(msg->u.hash, content.pbData,
content.cbData, 0);
}
CryptMemFree(hashAlgoID);
}
else
ret = TRUE;
if (ret)
ret = CryptGetHashParam(msg->u.hash, HP_HASHVAL, pvData, pcbData,
0);
ret = CryptGetHashParam(msg->u.hash, HP_HASHVAL, pvData, pcbData, 0);
break;
default:
{