libtpmtss: Get TPM 2.0 capabilities

src/libtpmtss/Makefile.am

@@ -8,7 +8,8 @@ ipseclib_LTLIBRARIES = libtpmtss.la
 libtpmtss_la_SOURCES = \
 	tpm_tss.h tpm_tss.c \
 	tpm_tss_trousers.h tpm_tss_trousers.c \
-	tpm_tss_tss2.h tpm_tss_tss2.c
+	tpm_tss_tss2.h tpm_tss_tss2.c \
+	tpm_tss_tss2_names.h tpm_tss_tss2_names.c
 
 libtpmtss_la_LIBADD = \
 	$(top_builddir)/src/libstrongswan/libstrongswan.la

src/libtpmtss/tpm_tss_tss2.c

@@ -14,6 +14,7 @@
  */
 
 #include "tpm_tss_tss2.h"
+#include "tpm_tss_tss2_names.h"
 
 #ifdef TSS_TSS2
 
@@ -60,6 +61,74 @@ int TpmClientPrintf (uint8_t type, const char *format, ...)
     return 0;
 }
 
+/**
+ * Get a list of supported algorithms
+ */
+static bool get_algs_capability(private_tpm_tss_tss2_t *this)
+{
+	TPMS_CAPABILITY_DATA cap_data;
+	TPMI_YES_NO more_data;
+	uint32_t rval, i;
+	size_t len = BUF_LEN;
+	char buf[BUF_LEN];
+	char *pos = buf;
+	int written;
+
+	/* get supported algorithms */
+	rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_ALGS,
+						0, TPM_PT_ALGORITHM_SET, &more_data, &cap_data, 0);
+	if (rval != TPM_RC_SUCCESS)
+	{
+		DBG1(DBG_PTS, "%s GetCapability failed for TPM_CAP_ALGS: 0x%06x",
+					   LABEL, rval);
+		return FALSE;
+	}
+
+	/* print supported algorithms */
+	for (i = 0; i < cap_data.data.algorithms.count; i++)
+	{
+		written = snprintf(pos, len, " %N", tpm_alg_id_names,
+						   cap_data.data.algorithms.algProperties[i].alg);
+		if (written < 0 || written >= len)
+		{
+			break;
+		}
+		pos += written;
+		len -= written;
+	}
+	DBG2(DBG_PTS, "%s algorithms:%s", LABEL, buf);
+
+	/* get supported ECC curves */
+	rval = Tss2_Sys_GetCapability(this->sys_context, 0, TPM_CAP_ECC_CURVES,
+						0, TPM_PT_LOADED_CURVES, &more_data, &cap_data, 0);
+	if (rval != TPM_RC_SUCCESS)
+	{
+		DBG1(DBG_PTS, "%s GetCapability failed for TPM_ECC_CURVES: 0x%06x",
+					   LABEL, rval);
+		return FALSE;
+	}
+
+	/* reset print buffer */
+	pos = buf;
+	len = BUF_LEN;
+
+	/* print supported ECC curves */
+	for (i = 0; i < cap_data.data.eccCurves.count; i++)
+	{
+		written = snprintf(pos, len, " %N", tpm_ecc_curve_names,
+						   cap_data.data.eccCurves.eccCurves[i]);
+		if (written < 0 || written >= len)
+		{
+			break;
+		}
+		pos += written;
+		len -= written;
+	}
+	DBG2(DBG_PTS, "%s ECC curves:%s", LABEL, buf);
+
+	return TRUE;
+}
+
 /**
  * Initialize TSS context
  */
@@ -116,7 +185,9 @@ static bool initialize_context(private_tpm_tss_tss2_t *this)
 					   LABEL, rval);
 		return FALSE;
 	}
-	return TRUE;
+
+	/* get a list of supported algorithms and ECC curves */
+	return get_algs_capability(this);
 }
 
 /**

src/libtpmtss/tpm_tss_tss2_names.c

@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2016 Andreas Steffen
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "tpm_tss_tss2_names.h"
+
+#ifdef TSS_TSS2
+
+#include <tss2/tpm20.h>
+
+#ifndef TPM_ALG_ECMQV
+#define TPM_ALG_ECMQV		(TPM_ALG_ID)0x001D
+#endif
+
+#ifndef TPM_ALG_CAMELLIA
+#define TPM_ALG_CAMELLIA	(TPM_ALG_ID)0x0026
+#endif
+
+/**
+ * TPM 2.0 algorithm ID names
+ */
+ENUM_BEGIN(tpm_alg_id_names, TPM_ALG_ERROR, TPM_ALG_RSA,
+	"ERROR",
+	"RSA"
+);
+ENUM_NEXT(tpm_alg_id_names, TPM_ALG_SHA1, TPM_ALG_KEYEDHASH, TPM_ALG_RSA,
+	"SHA1",
+	"HMAC",
+	"AES",
+	"MGF1",
+	"KEYEDHASH"
+);
+ENUM_NEXT(tpm_alg_id_names, TPM_ALG_XOR, TPM_ALG_SHA512, TPM_ALG_KEYEDHASH,
+	"XOR",
+	"SHA256",
+	"SHA384",
+	"SHA512"
+);
+ENUM_NEXT(tpm_alg_id_names, TPM_ALG_NULL, TPM_ALG_NULL, TPM_ALG_SHA512,
+	"NULL"
+);
+ENUM_NEXT(tpm_alg_id_names, TPM_ALG_SM3_256, TPM_ALG_ECMQV, TPM_ALG_NULL,
+	"SM3_256",
+	"SM4",
+	"RSASSA",
+	"RSAES",
+	"RSAPSS",
+	"OAEP",
+	"ECDSA",
+	"ECDH",
+	"SM2",
+	"ECSCHNORR",
+	"ECMQV"
+);
+ENUM_NEXT(tpm_alg_id_names, TPM_ALG_KDF1_SP800_56A, TPM_ALG_ECC, TPM_ALG_ECMQV,
+	"KDF1_SP800_56A",
+	"KDF2",
+	"KDF1_SP800_108",
+	"ECC"
+);
+ENUM_NEXT(tpm_alg_id_names, TPM_ALG_SYMCIPHER, TPM_ALG_CAMELLIA, TPM_ALG_ECC,
+	"SYMCIPHER",
+	"CAMELLIA"
+);
+ENUM_NEXT(tpm_alg_id_names, TPM_ALG_CTR, TPM_ALG_ECB, TPM_ALG_CAMELLIA,
+	"CTR",
+	"OFB",
+	"CBC",
+	"CFB",
+	"ECB"
+);
+ENUM_END(tpm_alg_id_names, TPM_ALG_ECB);
+
+/**
+ * TPM 2.0 ECC curve names
+ */
+ENUM_BEGIN(tpm_ecc_curve_names, TPM_ECC_NONE, TPM_ECC_NIST_P521,
+	"NONE",
+	"NIST_P192",
+	"NIST_P224",
+	"NIST_P256",
+	"NIST_P384",
+	"NIST_P521"
+);
+ENUM_NEXT(tpm_ecc_curve_names, TPM_ECC_BN_P256, TPM_ECC_BN_P638, TPM_ECC_NIST_P521,
+	"BN_P256",
+	"BN_P638"
+);
+ENUM_NEXT(tpm_ecc_curve_names, TPM_ECC_SM2_P256, TPM_ECC_SM2_P256, TPM_ECC_BN_P638,
+	"SM2_P256"
+);
+ENUM_END(tpm_ecc_curve_names, TPM_ECC_SM2_P256);
+
+#else /* TSS_TSS2 */
+
+/**
+ * TPM 2.0 algorithm ID names
+ */
+ENUM(tpm_alg_id_names, 0, 0,
+	"ERROR"
+);
+
+/**
+ * TPM 2.0 ECC curve names
+ */
+ENUM(tpm_ecc_curve_names, 0, 0,
+	"NONE"
+);
+
+#endif /* TSS_TSS2 */
+
+

src/libtpmtss/tpm_tss_tss2_names.h

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 Andreas Steffen
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup tpm_tss_tss_names tpm_tss_tss_names
+ * @{ @ingroup libtpmtss
+ */
+
+#ifndef TPM_TSS_TSS2_NAMES_H_
+#define TPM_TSS_TSS2_NAMES_H_
+
+#include <library.h>
+
+extern enum_name_t *tpm_alg_id_names;
+
+extern enum_name_t *tpm_ecc_curve_names;
+
+#endif /** TPM_TSS_TSS2_NAMES_H_ @}*/