Renamed credential service to abd, replaced all related functions, parameters, etc

1 files changed, 274 insertions, 0 deletions

diff --git a/src/abd/delegate_misc.c b/src/abd/delegate_misc.c
new file mode 100644
index 000000000..ecc7f7669
--- /dev/null
+++ b/src/abd/delegate_misc.c
@@ -0,0 +1,274 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2009-2013, 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 abd/delegate_misc.c
+ * @brief Misc API for delegate
+ *
+ * @author Martin Schanzenbach
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_constants.h"
+#include "gnunet_abd_service.h"
+#include "gnunet_signatures.h"
+#include "abd.h"
+#include <inttypes.h>
+
+char *
+GNUNET_ABD_delegate_to_string (
+  const struct GNUNET_ABD_Delegate *cred)
+{
+  char *cred_str;
+  char *subject_pkey;
+  char *issuer_pkey;
+  char *signature;
+
+  subject_pkey = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred->subject_key);
+  issuer_pkey = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred->issuer_key);
+  GNUNET_STRINGS_base64_encode ((char *) &cred->signature,
+                                sizeof (struct GNUNET_CRYPTO_EcdsaSignature),
+                                &signature);
+  if (0 == cred->subject_attribute_len)
+  {
+    GNUNET_asprintf (&cred_str,
+                     "%s.%s -> %s | %s | %" SCNu64,
+                     issuer_pkey,
+                     cred->issuer_attribute,
+                     subject_pkey,
+                     signature,
+                     cred->expiration.abs_value_us);
+  }
+  else
+  {
+    GNUNET_asprintf (&cred_str,
+                     "%s.%s -> %s.%s | %s | %" SCNu64,
+                     issuer_pkey,
+                     cred->issuer_attribute,
+                     subject_pkey,
+                     cred->subject_attribute,
+                     signature,
+                     cred->expiration.abs_value_us);
+  }
+  GNUNET_free (subject_pkey);
+  GNUNET_free (issuer_pkey);
+  GNUNET_free (signature);
+
+  return cred_str;
+}
+
+struct GNUNET_ABD_Delegate *
+GNUNET_ABD_delegate_from_string (const char *s)
+{
+  struct GNUNET_ABD_Delegate *dele;
+  size_t enclen = (sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)) * 8;
+  if (enclen % 5 > 0)
+    enclen += 5 - enclen % 5;
+  enclen /= 5; /* 260/5 = 52 */
+  char subject_pkey[enclen + 1];
+  char issuer_pkey[enclen + 1];
+  char iss_attr[253 + 1];
+  // Needs to be initialized, in case of Type 1 credential (A.a <- B)
+  char sub_attr[253 + 1] = "";
+  char signature[256]; //TODO max payload size
+
+  struct GNUNET_CRYPTO_EcdsaSignature *sig;
+  struct GNUNET_TIME_Absolute etime_abs;
+
+  // If it's A.a <- B.b...
+  if (6 != SSCANF (s,
+                   "%52s.%253s -> %52s.%253s | %s | %" SCNu64,
+                   issuer_pkey,
+                   iss_attr,
+                   subject_pkey,
+                   sub_attr,
+                   signature,
+                   &etime_abs.abs_value_us))
+  {
+    // Try if it's A.a <- B
+    if (5 != SSCANF (s,
+                     "%52s.%253s -> %52s | %s | %" SCNu64,
+                     issuer_pkey,
+                     iss_attr,
+                     subject_pkey,
+                     signature,
+                     &etime_abs.abs_value_us))
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "Unable to parse DEL record string `%s'\n",
+                  s);
+      return NULL;
+    }
+  }
+
+  // +1 for \0
+  int attr_len;
+  if (strcmp (sub_attr, "") == 0)
+  {
+    attr_len = strlen (iss_attr) + 1;
+  }
+  else
+  {
+    attr_len = strlen (iss_attr) + strlen (sub_attr) + 2;
+  }
+  dele = GNUNET_malloc (sizeof (struct GNUNET_ABD_Delegate) + attr_len);
+
+  char tmp_str[attr_len];
+  GNUNET_memcpy (tmp_str, iss_attr, strlen (iss_attr));
+  if (strcmp (sub_attr, "") != 0)
+  {
+    tmp_str[strlen (iss_attr)] = '\0';
+    GNUNET_memcpy (tmp_str + strlen (iss_attr) + 1,
+                   sub_attr,
+                   strlen (sub_attr));
+  }
+  tmp_str[attr_len - 1] = '\0';
+
+  GNUNET_CRYPTO_ecdsa_public_key_from_string (subject_pkey,
+                                              strlen (subject_pkey),
+                                              &dele->subject_key);
+  GNUNET_CRYPTO_ecdsa_public_key_from_string (issuer_pkey,
+                                              strlen (issuer_pkey),
+                                              &dele->issuer_key);
+  GNUNET_assert (sizeof (struct GNUNET_CRYPTO_EcdsaSignature) ==
+                 GNUNET_STRINGS_base64_decode (signature,
+                                               strlen (signature),
+                                               (void **) &sig));
+  dele->signature = *sig;
+  dele->expiration = etime_abs;
+  GNUNET_free (sig);
+
+  GNUNET_memcpy (&dele[1], tmp_str, attr_len);
+
+  dele->issuer_attribute = (char *) &dele[1];
+  dele->issuer_attribute_len = strlen (iss_attr);
+  if (strcmp (sub_attr, "") == 0)
+  {
+    dele->subject_attribute = NULL;
+    dele->subject_attribute_len = 0;
+  }
+  else
+  {
+    dele->subject_attribute = (char *) &dele[1] + strlen (iss_attr) + 1;
+    dele->subject_attribute_len = strlen (sub_attr);
+  }
+
+  return dele;
+}
+
+/**
+ * Issue an attribute to a subject
+ *
+ * @param issuer the ego that should be used to issue the attribute
+ * @param subject the subject of the attribute
+ * @param iss_attr the name of the attribute
+ * @return handle to the queued request
+ */
+
+struct GNUNET_ABD_Delegate *
+GNUNET_ABD_delegate_issue (
+  const struct GNUNET_CRYPTO_EcdsaPrivateKey *issuer,
+  struct GNUNET_CRYPTO_EcdsaPublicKey *subject,
+  const char *iss_attr,
+  const char *sub_attr,
+  struct GNUNET_TIME_Absolute *expiration)
+{
+  struct DelegateEntry *del;
+  struct GNUNET_ABD_Delegate *dele;
+  size_t size;
+  int attr_len;
+
+  if (NULL == sub_attr)
+  {
+    // +1 for \0
+    attr_len = strlen (iss_attr) + 1;
+  }
+  else
+  {
+    // +2 for both strings need to be terminated with \0
+    attr_len = strlen (iss_attr) + strlen (sub_attr) + 2;
+  }
+  size = sizeof (struct DelegateEntry) + attr_len;
+
+  char tmp_str[attr_len];
+  GNUNET_memcpy (tmp_str, iss_attr, strlen (iss_attr));
+  if (NULL != sub_attr)
+  {
+    tmp_str[strlen (iss_attr)] = '\0';
+    GNUNET_memcpy (tmp_str + strlen (iss_attr) + 1,
+                   sub_attr,
+                   strlen (sub_attr));
+  }
+  tmp_str[attr_len - 1] = '\0';
+
+  del = GNUNET_malloc (size);
+  del->purpose.size =
+    htonl (size - sizeof (struct GNUNET_CRYPTO_EcdsaSignature));
+  del->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_DELEGATE);
+  GNUNET_CRYPTO_ecdsa_key_get_public (issuer, &del->issuer_key);
+  del->subject_key = *subject;
+  del->expiration = GNUNET_htonll (expiration->abs_value_us);
+  del->issuer_attribute_len = htonl (strlen (iss_attr) + 1);
+  if (NULL == sub_attr)
+  {
+    del->subject_attribute_len = htonl (0);
+  }
+  else
+  {
+    del->subject_attribute_len = htonl (strlen (sub_attr) + 1);
+  }
+
+  GNUNET_memcpy (&del[1], tmp_str, attr_len);
+
+  if (GNUNET_OK !=
+      GNUNET_CRYPTO_ecdsa_sign (issuer, &del->purpose, &del->signature))
+  {
+    GNUNET_break (0);
+    GNUNET_free (del);
+    return NULL;
+  }
+
+  dele = GNUNET_malloc (sizeof (struct GNUNET_ABD_Delegate) + attr_len);
+  dele->signature = del->signature;
+  dele->expiration = *expiration;
+  GNUNET_CRYPTO_ecdsa_key_get_public (issuer, &dele->issuer_key);
+
+  dele->subject_key = *subject;
+
+  // Copy the combined string at the part in the memory where the struct ends
+  GNUNET_memcpy (&dele[1], tmp_str, attr_len);
+
+  dele->issuer_attribute = (char *) &dele[1];
+  dele->issuer_attribute_len = strlen (iss_attr);
+  if (NULL == sub_attr)
+  {
+    dele->subject_attribute = NULL;
+    dele->subject_attribute_len = 0;
+  }
+  else
+  {
+    dele->subject_attribute = (char *) &dele[1] + strlen (iss_attr) + 1;
+    dele->subject_attribute_len = strlen (sub_attr);
+  }
+
+  GNUNET_free (del);
+  return dele;
+}