Imported Upstream version 0.3.9upstream/0.3.9upstream

1 files changed, 117 insertions, 0 deletions

diff --git a/src/tspi/tsp_asym.c b/src/tspi/tsp_asym.c
new file mode 100644
index 0000000..721e8fd
--- /dev/null
+++ b/src/tspi/tsp_asym.c
@@ -0,0 +1,117 @@
+
+/*
+ * Licensed Materials - Property of IBM
+ *
+ * trousers - An open source TCG Software Stack
+ *
+ * (C) Copyright International Business Machines Corp. 2004-2007
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "trousers/tss.h"
+#include "trousers/trousers.h"
+#include "trousers_types.h"
+#include "spi_utils.h"
+#include "capabilities.h"
+#include "tsplog.h"
+#include "obj.h"
+
+
+/* encrypt some data with the RSA public key of 'key', using the padding appropriate for the key */
+TSS_RESULT
+__tspi_rsa_encrypt(TSS_HKEY key,
+	    UINT32   inDataLen,
+	    BYTE*    inData,
+	    UINT32*  outDataLen,
+	    BYTE*    outData)
+{
+	BYTE *blob;
+	UINT32 blobLen;
+	UINT64 offset;
+	TSS_RESULT result;
+	TSS_HCONTEXT tspContext;
+	TPM_PUBKEY pubKey;
+
+	if (!inData || !outDataLen || !outData)
+		return TSPERR(TSS_E_INTERNAL_ERROR);
+
+	if ((result = obj_rsakey_get_tsp_context(key, &tspContext)))
+		return result;
+
+	if ((result = obj_rsakey_get_pub_blob(key, &blobLen, &blob)))
+		return result;
+
+	offset = 0;
+	if ((result = Trspi_UnloadBlob_PUBKEY(&offset, blob, &pubKey))) {
+		free_tspi(tspContext, blob);
+		return result;
+	}
+	free_tspi(tspContext, blob);
+
+	if (pubKey.pubKey.keyLength < inDataLen) {
+		result = TSPERR(TSS_E_ENC_INVALID_LENGTH);
+		goto done;
+	}
+
+	if (pubKey.algorithmParms.encScheme == TPM_ES_RSAESPKCSv15 ||
+	    pubKey.algorithmParms.encScheme == TSS_ES_RSAESPKCSV15) {
+		if ((result = Trspi_RSA_PKCS15_Encrypt(inData, inDataLen, outData, outDataLen,
+						       pubKey.pubKey.key, pubKey.pubKey.keyLength)))
+			goto done;
+	} else {
+		if ((result = Trspi_TPM_RSA_OAEP_Encrypt(inData, inDataLen, outData, outDataLen,
+							 pubKey.pubKey.key,
+							 pubKey.pubKey.keyLength)))
+			goto done;
+	}
+
+done:
+	free(pubKey.pubKey.key);
+	free(pubKey.algorithmParms.parms);
+	return result;
+}
+
+TSS_RESULT
+__tspi_rsa_verify(TSS_HKEY key,
+	   UINT32   type,
+	   UINT32   hashLen,
+	   BYTE*    hash,
+	   UINT32   sigLen,
+	   BYTE*    sig)
+{
+	BYTE *blob;
+	UINT32 blobLen;
+	UINT64 offset;
+	TSS_RESULT result;
+	TSS_HCONTEXT tspContext;
+	TPM_PUBKEY pubKey;
+
+	if (!hash || !sig)
+		return TSPERR(TSS_E_INTERNAL_ERROR);
+
+	if ((result = obj_rsakey_get_tsp_context(key, &tspContext)))
+		return result;
+
+	if ((result = obj_rsakey_get_pub_blob(key, &blobLen, &blob)))
+		return result;
+
+	offset = 0;
+	if ((result = Trspi_UnloadBlob_PUBKEY(&offset, blob, &pubKey))) {
+		free_tspi(tspContext, blob);
+		return result;
+	}
+	free_tspi(tspContext, blob);
+
+	result = Trspi_Verify(type, hash, hashLen, pubKey.pubKey.key, pubKey.pubKey.keyLength,
+			      sig, sigLen);
+
+	free(pubKey.pubKey.key);
+	free(pubKey.algorithmParms.parms);
+
+	return result;
+}