-w3cvc init

4 files changed, 461 insertions, 2 deletions

diff --git a/src/did/test_w3c_ed25519_2020.c b/src/did/test_w3c_ed25519_2020.c
new file mode 100644
index 000000000..e2534e6ab
--- /dev/null
+++ b/src/did/test_w3c_ed25519_2020.c
@@ -0,0 +1,69 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2012-2021 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   GNUnet 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
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+
+
+/**
+ * @file src/did/test_w3c_ed25519_2020.c
+ * @brief Testcases for the w3c Ed25519 formats for SSIs https://w3c-ccg.github.io/lds-ed25519-2020
+ * @author Martin Schanzenbach
+ */
+
+#include "platform.h"
+#include "gnunet_crypto_lib.h"
+#include "gnunet_strings_lib.h"
+
+static char test_privkey[32] = {
+  0x9b, 0x93, 0x7b, 0x81, 0x32, 0x2d, 0x81, 0x6c,
+  0xfa, 0xb9, 0xd5, 0xa3, 0xba, 0xac, 0xc9, 0xb2,
+  0xa5, 0xfe, 0xbe, 0x4b, 0x14, 0x9f, 0x12, 0x6b,
+  0x36, 0x30, 0xf9, 0x3a, 0x29, 0x52, 0x70, 0x17
+};
+
+static char *targetPublicKeyMultibase = "u7QEJX5oaWV3edV2CeGhkrQPfpaT71ogyVmNk4rZeE8yeRA";
+
+int
+main ()
+{
+  struct GNUNET_CRYPTO_EddsaPrivateKey privkey;
+  struct GNUNET_CRYPTO_EddsaPublicKey pubkey;
+
+  memcpy (&privkey, test_privkey, sizeof (privkey));
+  GNUNET_CRYPTO_eddsa_key_get_public (&privkey, &pubkey);
+
+  //This is how to convert out pubkeys to W3c Ed25519-2020 multibase (base64url no padding)
+  char *b64;
+  char pkx[34];
+  pkx[0] = 0xed;
+  pkx[1] = 0x01;
+  memcpy (pkx+2, &pubkey, sizeof (pubkey));
+  GNUNET_STRINGS_base64url_encode (pkx,
+                                   sizeof (pkx),
+                                   &b64);
+  printf ("u%s\n%s\n", b64, targetPublicKeyMultibase);
+  // FIXME convert pubkey to target
+  char *res;
+  GNUNET_asprintf (&res, "u%s", b64);
+  GNUNET_assert (0 == strcmp (res,
+                              targetPublicKeyMultibase));
+
+  GNUNET_free (b64);
+  GNUNET_free (res);
+  return 0;
+}
diff --git a/src/include/gnunet_reclaim_lib.h b/src/include/gnunet_reclaim_lib.h
index bbf1c3ad3..8e0e19f01 100644
--- a/src/include/gnunet_reclaim_lib.h
+++ b/src/include/gnunet_reclaim_lib.h
@@ -65,7 +65,12 @@ enum GNUNET_RECLAIM_CredentialType {
   /**
    * libpabc credential
    */
-  GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC = 2
+  GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC = 2,
+
+  /**
+   * verifiable credential
+   */
+  GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE = 3
 };
 
 /**
diff --git a/src/reclaim/Makefile.am b/src/reclaim/Makefile.am
index 350d77d4b..911a95134 100644
--- a/src/reclaim/Makefile.am
+++ b/src/reclaim/Makefile.am
@@ -14,7 +14,8 @@ REST_PLUGIN = \
   libgnunet_plugin_rest_reclaim.la
 
 CREDENTIAL_PLUGIN = \
-  libgnunet_plugin_reclaim_credential_jwt.la
+  libgnunet_plugin_reclaim_credential_jwt.la \
+  libgnunet_plugin_reclaim_w3c_verifiable_credential.la
 
 if HAVE_PABC
   CREDENTIAL_PLUGIN += libgnunet_plugin_reclaim_credential_pabc.la
@@ -171,6 +172,18 @@ libgnunet_plugin_reclaim_credential_jwt_la_LIBADD = \
 libgnunet_plugin_reclaim_credential_jwt_la_LDFLAGS = \
  $(GN_PLUGIN_LDFLAGS)
 
+
+libgnunet_plugin_reclaim_w3c_verifiable_credential_la_SOURCES = \
+  plugin_reclaim_w3c_verifiable_credential.c
+libgnunet_plugin_reclaim_w3c_verifiable_credential_la_LIBADD = \
+  $(top_builddir)/src/util/libgnunetutil.la \
+  libgnunetreclaim.la \
+  -ljansson\
+  $(LTLIBINTL)
+libgnunet_plugin_reclaim_w3c_verifiable_credential_la_LDFLAGS = \
+ $(GN_PLUGIN_LDFLAGS)
+
+
 gnunet_reclaim_SOURCES = \
  gnunet-reclaim.c
 gnunet_reclaim_LDADD = \
diff --git a/src/reclaim/plugin_reclaim_w3c_verifiable_credential.c b/src/reclaim/plugin_reclaim_w3c_verifiable_credential.c
new file mode 100644
index 000000000..7902b2084
--- /dev/null
+++ b/src/reclaim/plugin_reclaim_w3c_verifiable_credential.c
@@ -0,0 +1,372 @@
+/*
+     This file is part of GNUnet
+     Copyright (C) 2013, 2014, 2016 GNUnet e.V.
+
+     GNUnet is free software: you can redistribute it and/or modify it
+     under the terms of the GNU Affero General Public License as published
+     by the Free Software Foundation, either version 3 of the License,
+     or (at your option) any later version.
+
+     GNUnet 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
+     Affero General Public License for more details.
+
+     You should have received a copy of the GNU Affero General Public License
+     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+     SPDX-License-Identifier: AGPL3.0-or-later
+ */
+
+/**
+ * @file reclaim/plugin_reclaim_w3c_verfiable_credential.c
+ * @brief reclaim-w3c-verifiable-credential-plugin attribute plugin to provide the API for
+ *                                      W3C credentials.
+ * @author Tristan Schwieren
+ */
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_reclaim_plugin.h"
+#include <inttypes.h>
+#include <jansson.h>
+
+/**
+   * Convert the 'value' of an verifiable credential to a string.
+   *
+   * @param cls closure
+   * @param type type of the credential
+   * @param data value in binary encoding
+   * @param data_size number of bytes in @a data
+   * @return NULL on error, otherwise human-readable representation of the value
+   */
+static char *
+w3cvc_value_to_string (void *cls,
+                     uint32_t type,
+                     const void *data,
+                     size_t data_size)
+{
+  switch (type)
+  {
+  case GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE:
+    return GNUNET_strndup (data, data_size);
+    //return "A super cool verifiable credential\n";
+  default:
+    return NULL;
+  }
+}
+
+
+/**
+ * Convert human-readable version of a 'value' of an credential to the binary
+ * representation.
+ *
+ * @param cls closure
+ * @param type type of the credential
+ * @param s human-readable string
+ * @param data set to value in binary encoding (will be allocated)
+ * @param data_size set to number of bytes in @a data
+ * @return #GNUNET_OK on success
+ */
+static int
+w3cvc_string_to_value (void *cls,
+                     uint32_t type,
+                     const char *s,
+                     void **data,
+                     size_t *data_size)
+{
+  if (NULL == s)
+    return GNUNET_SYSERR;
+
+  switch (type)
+  {
+  case GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE:
+    *data = GNUNET_strdup (s);
+    *data_size = strlen (s) + 1;
+    return GNUNET_OK;
+
+  default:
+    return GNUNET_SYSERR;
+  }
+}
+
+
+/**
+ * Mapping of credential type numbers to human-readable
+ * credential type names.
+ */
+static struct
+{
+  const char *name;
+  uint32_t number;
+} w3cvc_cred_name_map[] = { { "W3CVC", GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE},
+                          { NULL, UINT32_MAX } };
+
+/**
+   * Convert a type name to the corresponding number.
+   *
+   * @param cls closure, unused
+   * @param w3cvc_typename name to convert
+   * @return corresponding number, UINT32_MAX on error
+   */
+static uint32_t
+w3cvc_typename_to_number (void *cls, const char *w3cvc_typename)
+{
+  unsigned int i;
+
+  i = 0;
+  while ((NULL != w3cvc_cred_name_map[i].name) &&
+         (0 != strcasecmp (w3cvc_typename, w3cvc_cred_name_map[i].name)))
+    i++;
+  return w3cvc_cred_name_map[i].number;
+}
+
+
+/**
+ * Convert a type number to the corresponding type string (e.g. 1 to "A")
+ *
+ * @param cls closure, unused
+ * @param type number of a type to convert
+ * @return corresponding typestring, NULL on error
+ */
+static const char *
+w3cvc_number_to_typename (void *cls, uint32_t type)
+{
+  unsigned int i;
+
+  i = 0;
+  while ((NULL != w3cvc_cred_name_map[i].name) && (type !=
+                                                 w3cvc_cred_name_map[i].
+                                                 number))
+    i++;
+  return w3cvc_cred_name_map[i].name;
+}
+
+
+/**
+ * Parse a W3C Verifiable Credential and return the respective claim value as Attribute
+ *
+ * @param cls the plugin
+ * @param cred the W3C Verifiable credential
+ * @return a GNUNET_RECLAIM_Attribute, containing the new value
+ */
+struct GNUNET_RECLAIM_AttributeList *
+w3cvc_parse_attributes (void *cls,
+                      const char *data,
+                      size_t data_size)
+{
+  struct GNUNET_RECLAIM_AttributeList *attrs = GNUNET_new (struct GNUNET_RECLAIM_AttributeList);
+
+  GNUNET_RECLAIM_attribute_list_add (attrs,
+                                     "astring",
+                                     NULL,
+                                     GNUNET_RECLAIM_ATTRIBUTE_TYPE_STRING,
+                                     data,
+                                     strlen(data));
+
+  return attrs;
+}
+
+
+/**
+ * Parse a W3C verifiable credential and return the respective claim value as Attribute
+ *
+ * @param cls the plugin
+ * @param cred the w3cvc credential
+ * @return a GNUNET_RECLAIM_Attribute, containing the new value
+ */
+struct GNUNET_RECLAIM_AttributeList *
+w3cvc_parse_attributes_c (void *cls,
+                        const struct GNUNET_RECLAIM_Credential *cred)
+{
+  if (cred->type != GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE)
+    return NULL;
+  return w3cvc_parse_attributes (cls, cred->data, cred->data_size);
+}
+
+
+/**
+ * Parse a W3C verifiable presentation and return the respective claim value as Attribute
+ *
+ * @param cls the plugin
+ * @param cred the w3cvc credential
+ * @return a GNUNET_RECLAIM_Attribute, containing the new value
+ */
+struct GNUNET_RECLAIM_AttributeList *
+w3cvc_parse_attributes_p (void *cls,
+                        const struct GNUNET_RECLAIM_Presentation *cred)
+{
+  if (cred->type != GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE)
+    return NULL;
+  return w3cvc_parse_attributes (cls, cred->data, cred->data_size);
+}
+
+
+/**
+ * Parse a VC and return the issuer
+ *
+ * @param cls the plugin
+ * @param cred the verifiable credential
+ * @return a string, containing the isser
+ */
+char *
+w3cvc_get_issuer (void *cls,
+                const char *data,
+                size_t data_size)
+{
+  return "some cool boi";
+}
+
+
+/**
+ * Parse a Verifiable Credential and return the issuer
+ *
+ * @param cls the plugin
+ * @param cred the verifiable credential
+ * @return a string, containing the isser
+ */
+char *
+w3cvc_get_issuer_c (void *cls,
+                  const struct GNUNET_RECLAIM_Credential *cred)
+{
+  if (GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE != cred->type)
+    return NULL;
+  return w3cvc_get_issuer (cls, cred->data, cred->data_size);
+}
+
+
+/**
+ * Parse a Verifiable Credential and return the issuer
+ *
+ * @param cls the plugin
+ * @param cred the w3cvc credential
+ * @return a string, containing the isser
+ */
+char *
+w3cvc_get_issuer_p (void *cls,
+                  const struct GNUNET_RECLAIM_Presentation *cred)
+{
+  if (GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE != cred->type)
+    return NULL;
+  return w3cvc_get_issuer (cls, cred->data, cred->data_size);
+}
+
+
+/**
+ * Parse a Verifiable Credential and return the expiration
+ *
+ * @param cls the plugin
+ * @param cred the w3cvc credential
+ * @return a string, containing the expiration
+ */
+enum GNUNET_GenericReturnValue
+w3cvc_get_expiration (void *cls,
+                    const char *data,
+                    size_t data_size,
+                    struct GNUNET_TIME_Absolute *exp)
+{
+  exp->abs_value_us = UINT64_MAX;
+  return GNUNET_OK;
+}
+
+
+/**
+ * Parse a Verifiable Credential and return the expiration
+ *
+ * @param cls the plugin
+ * @param cred the w3cvc credential
+ * @return the expirati
+ */
+enum GNUNET_GenericReturnValue
+w3cvc_get_expiration_c (void *cls,
+                      const struct GNUNET_RECLAIM_Credential *cred,
+                      struct GNUNET_TIME_Absolute *exp)
+{
+  if (GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE != cred->type)
+    return GNUNET_NO;
+  return w3cvc_get_expiration (cls, cred->data, cred->data_size, exp);
+}
+
+
+/**
+ * Parse a verifiable credential and return the expiration
+ *
+ * @param cls the plugin
+ * @param cred the w3cvc credential
+ * @return a string, containing the isser
+ */
+enum GNUNET_GenericReturnValue
+w3cvc_get_expiration_p (void *cls,
+                      const struct GNUNET_RECLAIM_Presentation *cred,
+                      struct GNUNET_TIME_Absolute *exp)
+{
+  if (GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE  != cred->type)
+    return GNUNET_NO;
+  return w3cvc_get_expiration (cls, cred->data, cred->data_size, exp);
+}
+
+
+enum GNUNET_GenericReturnValue
+w3cvc_create_presentation (void *cls,
+                         const struct GNUNET_RECLAIM_Credential *cred,
+                         const struct GNUNET_RECLAIM_AttributeList *attrs,
+                         struct GNUNET_RECLAIM_Presentation **presentation)
+{
+  if (GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE != cred->type)
+    return GNUNET_NO;
+  *presentation = GNUNET_RECLAIM_presentation_new (
+    GNUNET_RECLAIM_W3C_VERFIIABLE_CREDENTIAL_TYPE,
+    cred->data,
+    cred->data_size);
+  return GNUNET_OK;
+}
+
+
+/**
+ * Entry point for the plugin.
+ *
+ * @param cls NULL
+ * @return the exported block API
+ */
+void *
+libgnunet_plugin_reclaim_credential_w3cvc_init (void *cls)
+{
+  struct GNUNET_RECLAIM_CredentialPluginFunctions *api;
+
+  api = GNUNET_new (struct GNUNET_RECLAIM_CredentialPluginFunctions);
+  api->value_to_string = &w3cvc_value_to_string;
+  api->string_to_value = &w3cvc_string_to_value;
+  api->typename_to_number = &w3cvc_typename_to_number;
+  api->number_to_typename = &w3cvc_number_to_typename;
+  api->get_attributes = &w3cvc_parse_attributes_c;
+  api->get_issuer = &w3cvc_get_issuer_c;
+  api->get_expiration = &w3cvc_get_expiration_c;
+  api->value_to_string_p = &w3cvc_value_to_string;
+  api->string_to_value_p = &w3cvc_string_to_value;
+  api->typename_to_number_p = &w3cvc_typename_to_number;
+  api->number_to_typename_p = &w3cvc_number_to_typename;
+  api->get_attributes_p = &w3cvc_parse_attributes_p;
+  api->get_issuer_p = &w3cvc_get_issuer_p;
+  api->get_expiration_p = &w3cvc_get_expiration_p;
+  api->create_presentation = &w3cvc_create_presentation;
+  return api;
+}
+
+
+/**
+ * Exit point from the plugin.
+ *
+ * @param cls the return value from #libgnunet_plugin_block_test_init()
+ * @return NULL
+ */
+void *
+libgnunet_plugin_reclaim_credential_w3cvc_done (void *cls)
+{
+  struct GNUNET_RECLAIM_CredentialPluginFunctions *api = cls;
+
+  GNUNET_free (api);
+  return NULL;
+}
+
+
+/* end of plugin_reclaim_w3c_verifiable_credential_type.c */