first sketch of eddsa helper

src/util/.gitignore

@@ -1,4 +1,5 @@
 taler-config
 test_payto
 taler-helper-crypto-rsa
+taler-helper-crypto-eddsa
 test_helper_rsa

src/util/Makefile.am

@@ -21,6 +21,7 @@ EXTRA_DIST = \
   test_helper_rsa.conf
 
 libexec_PROGRAMS = \
+  taler-helper-crypto-eddsa \
   taler-helper-crypto-rsa
 
 bin_SCRIPTS = \
@@ -44,6 +45,15 @@ taler_helper_crypto_rsa_LDADD = \
   $(LIBGCRYPT_LIBS) \
   $(XLIB)
 
+taler_helper_crypto_eddsa_SOURCES = \
+  taler-helper-crypto-eddsa.c taler-helper-crypto-eddsa.h
+taler_helper_crypto_eddsa_LDADD = \
+  libtalerutil.la \
+  -lgnunetutil \
+  -lpthread \
+  $(LIBGCRYPT_LIBS) \
+  $(XLIB)
+
 lib_LTLIBRARIES = \
   libtalerutil.la
 

src/util/taler-helper-crypto-eddsa.h

@@ -0,0 +1,188 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2020 Taler Systems SA
+
+  TALER 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 3, or (at your option) any later version.
+
+  TALER 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.
+
+  You should have received a copy of the GNU General Public License along with
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file util/taler-helper-crypto-eddsa.h
+ * @brief IPC messages for the EDDSA crypto helper.
+ * @author Christian Grothoff
+ */
+#ifndef TALER_HELPER_CRYPTO_EDDSA_H
+#define TALER_HELPER_CRYPTO_EDDSA_H
+
+#define TALER_HELPER_EDDSA_MT_PURGE 11
+#define TALER_HELPER_EDDSA_MT_AVAIL 12
+
+#define TALER_HELPER_EDDSA_MT_REQ_INIT 14
+#define TALER_HELPER_EDDSA_MT_REQ_SIGN 15
+#define TALER_HELPER_EDDSA_MT_REQ_REVOKE 16
+
+#define TALER_HELPER_EDDSA_MT_RES_SIGNATURE 17
+#define TALER_HELPER_EDDSA_MT_RES_SIGN_FAILURE 18
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Message sent if a key is available.
+ */
+struct TALER_CRYPTO_EddsaKeyAvailableNotification
+{
+  /**
+   * Type is #TALER_HELPER_EDDSA_MT_AVAIL
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * For now, always zero.
+   */
+  uint32_t reserved;
+
+  /**
+   * When does the key become available?
+   */
+  struct GNUNET_TIME_AbsoluteNBO anchor_time;
+
+  /**
+   * How long is the key available after @e anchor_time?
+   */
+  struct GNUNET_TIME_RelativeNBO duration;
+
+  /**
+   * The public key.
+   */
+  struct TALER_ExchangePublicKeyP exchange_pub;
+
+};
+
+
+/**
+ * Message sent if a key was purged.
+ */
+struct TALER_CRYPTO_EddsaKeyPurgeNotification
+{
+  /**
+   * Type is #TALER_HELPER_EDDSA_MT_PURGE.
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * For now, always zero.
+   */
+  uint32_t reserved;
+
+  /**
+   * The public key.
+   */
+  struct TALER_ExchangePublicKeyP exchange_pub;
+
+};
+
+
+/**
+ * Message sent if a signature is requested.
+ */
+struct TALER_CRYPTO_SignRequest
+{
+  /**
+   * Type is #TALER_HELPER_EDDSA_MT_REQ_SIGN.
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * For now, always zero.
+   */
+  uint32_t reserved;
+
+  /**
+   * What should be signed over.
+   */
+  struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
+
+  /* followed by rest of data to sign */
+};
+
+
+/**
+ * Message sent if a key was revoked.
+ */
+struct TALER_CRYPTO_RevokeRequest
+{
+  /**
+   * Type is #TALER_HELPER_EDDSA_MT_REQ_REVOKE.
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * For now, always zero.
+   */
+  uint32_t reserved;
+
+  /**
+   * The public key to revoke.
+   */
+  struct TALER_ExchangePublicKeyP exchange_pub;
+
+};
+
+
+/**
+ * Message sent if a signature was successfully computed.
+ */
+struct TALER_CRYPTO_SignResponse
+{
+  /**
+   * Type is #TALER_HELPER_EDDSA_MT_RES_SIGNATURE.
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * For now, always zero.
+   */
+  uint32_t reserved;
+
+  /**
+   * The public key used for the signature.
+   */
+  struct TALER_ExchangePublicKeyP exchange_pub;
+
+  /**
+   * The public key to use for the signature.
+   */
+  struct TALER_ExchangeSignatureP exchange_sig;
+
+};
+
+
+/**
+ * Message sent if signing failed.
+ */
+struct TALER_CRYPTO_SignFailure
+{
+  /**
+   * Type is #TALER_HELPER_EDDSA_MT_RES_SIGN_FAILURE.
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * If available, Taler error code. In NBO.
+   */
+  uint32_t ec;
+
+};
+
+
+GNUNET_NETWORK_STRUCT_END
+
+
+#endif