From d611032e1e5b4e2261625ee924071e9713320837 Mon Sep 17 00:00:00 2001
From: Stef Walter <stef@memberwebs.com>
Date: Thu, 4 Dec 2008 18:59:50 +0000
Subject: Implement RSA Sign and Decrypt operations. Not tested.

---
 ckcapi-key.c | 92 ++++++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 64 insertions(+), 28 deletions(-)

(limited to 'ckcapi-key.c')

diff --git a/ckcapi-key.c b/ckcapi-key.c
index 1ce057c..88e769e 100644
--- a/ckcapi-key.c
+++ b/ckcapi-key.c
@@ -97,6 +97,40 @@ typedef struct _KeyObjectData
 }
 KeyObjectData;
 
+static CK_RV
+load_key_handle (CkCapiObjectData* objdata, HCRYPTKEY* ret_key)
+{
+	KeyObjectData* kdata = (KeyObjectData*)objdata;
+	HCRYPTPROV prov;
+	HCRYPTKEY key;
+	DWORD error;
+
+	ASSERT(kdata);
+
+	if(!CryptAcquireContextW(&prov, kdata->prov_info->pwszContainerName, 
+	                         kdata->prov_info->pwszProvName, 
+	                         kdata->prov_info->dwProvType, 0))
+	{
+		return ckcapi_winerr_to_ckr(GetLastError());
+	}
+
+	if(!CryptGetUserKey(prov, kdata->prov_info->dwKeySpec, &key))
+	{
+		error = GetLastError();
+		CryptReleaseContext(prov, 0);
+		return ckcapi_winerr_to_ckr(error);
+	}
+
+	if(ret_key)
+		*ret_key = key;
+	else
+		CryptDestroyKey(key);
+
+	CryptReleaseContext(prov, 0);
+	return CKR_OK;
+}
+
+
 static CK_RV
 load_raw_public_key(KeyObjectData* kdata)
 {
@@ -108,7 +142,7 @@ load_raw_public_key(KeyObjectData* kdata)
 	ASSERT(kdata);
 	ASSERT(!kdata->raw_public_key.pbData);
 
-	ret = ckcapi_key_object_data_get_handles(&kdata->base, NULL, &key);
+	ret = load_key_handle(&kdata->base, &key);
 	if(ret != CKR_OK)
 		return ret;
 
@@ -994,40 +1028,42 @@ ckcapi_key_find(CkCapiSession* sess, CK_OBJECT_CLASS cls,
 	return ret;
 }
 
-CK_RV
-ckcapi_key_object_data_get_handles (CkCapiObjectData* objdata, HCRYPTPROV* ret_prov,
-                                    HCRYPTKEY* ret_key)
+DWORD
+ckcapi_key_object_data_get_bits(CkCapiObjectData* objdata)
 {
-	KeyObjectData* kdata = (KeyObjectData*)objdata;
-	HCRYPTPROV prov;
-	HCRYPTKEY key;
-	DWORD error;
+	KeyObjectData* kdata;
+	PUBLICKEYSTRUC* header;
+	RSAPUBKEY* pubkey;
+	CK_RV ret;
 
-	ASSERT(kdata);
+	ASSERT(objdata);
 
-	if(!CryptAcquireContextW(&prov, kdata->prov_info->pwszContainerName, 
-	                         kdata->prov_info->pwszProvName, 
-	                         kdata->prov_info->dwProvType, 0))
+	kdata = (KeyObjectData*)objdata;
+	
+	if(!kdata->raw_public_key.pbData)
 	{
-		return ckcapi_winerr_to_ckr(GetLastError());
+		ret = load_raw_public_key(kdata);
+		if(ret != CKR_OK)
+			return ret;
 	}
 
-	if(!CryptGetUserKey(prov, kdata->prov_info->dwKeySpec, &key))
-	{
-		error = GetLastError();
-		CryptReleaseContext(prov, 0);
-		return ckcapi_winerr_to_ckr(error);
-	}
+	header = (PUBLICKEYSTRUC*)kdata->raw_public_key.pbData;
+	if(!header->bType == PUBLICKEYBLOB)
+		return 0;
 
-	if(ret_key)
-		*ret_key = key;
-	else
-		CryptDestroyKey(key);
+	pubkey = (RSAPUBKEY*)(header + 1);
+	if(!pubkey->magic == 0x31415352)
+		return 0;
 
-	if(ret_prov)
-		*ret_prov = prov;
-	else
-		CryptReleaseContext(prov, 0);
+	return pubkey->bitlen;
+}
 
-	return CKR_OK;
+CRYPT_KEY_PROV_INFO*
+ckcapi_key_object_data_get_prov_info(CkCapiObjectData* objdata)
+{
+	KeyObjectData* kdata;
+
+	ASSERT(objdata);
+	kdata = (KeyObjectData*)objdata;
+	return kdata->prov_info;
 }
-- 
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