/**
* @file credential/plugin_gnsrecord_credential.c
* @brief gnsrecord plugin to provide the API for CREDENTIAL records
- * @author Adnan Husain
+ * @author Martin Schanzenbach
*/
#include "platform.h"
#include "gnunet_credential_service.h"
#include "gnunet_gnsrecord_plugin.h"
#include "gnunet_signatures.h"
-
+#include "credential_serialization.h"
+#include "credential_misc.h"
/**
* Convert the 'value' of a record to a string.
{
case GNUNET_GNSRECORD_TYPE_ATTRIBUTE:
{
- struct GNUNET_CREDENTIAL_AttributeRecordData attr;
+ struct GNUNET_CREDENTIAL_DelegationRecord sets;
char *attr_str;
char *subject_pkey;
-
- if (data_size < sizeof (struct GNUNET_CREDENTIAL_AttributeRecordData))
+ char *tmp_str;
+ int i;
+ if (data_size < sizeof (struct GNUNET_CREDENTIAL_DelegationRecord))
return NULL; /* malformed */
- memcpy (&attr,
- data,
- sizeof (attr));
+ GNUNET_memcpy (&sets,
+ data,
+ sizeof (sets));
cdata = data;
- subject_pkey = GNUNET_CRYPTO_ecdsa_public_key_to_string (&attr.subject_key);
- GNUNET_asprintf (&attr_str,
- "%s.%s",
- subject_pkey,
- &cdata[sizeof (attr)]);
- GNUNET_free (subject_pkey);
+ struct GNUNET_CREDENTIAL_DelegationSet set[ntohl(sets.set_count)];
+ if (GNUNET_OK != GNUNET_CREDENTIAL_delegation_set_deserialize (GNUNET_ntohll (sets.data_size),
+ &cdata[sizeof (sets)],
+ ntohl (sets.set_count),
+ set))
+ return NULL;
+
+ for (i=0;i<ntohl(sets.set_count);i++)
+ {
+ subject_pkey = GNUNET_CRYPTO_ecdsa_public_key_to_string (&set[i].subject_key);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%d len attr\n", set[i].subject_attribute_len);
+ if (0 == set[i].subject_attribute_len)
+ {
+ if (0 == i)
+ {
+ GNUNET_asprintf (&attr_str,
+ "%s",
+ subject_pkey);
+ } else {
+ GNUNET_asprintf (&tmp_str,
+ "%s,%s",
+ attr_str,
+ subject_pkey);
+ GNUNET_free (attr_str);
+ attr_str = tmp_str;
+ }
+ } else {
+ if (0 == i)
+ {
+ GNUNET_asprintf (&attr_str,
+ "%s %s",
+ subject_pkey,
+ set[i].subject_attribute);
+ } else {
+ GNUNET_asprintf (&tmp_str,
+ "%s,%s %s",
+ attr_str,
+ subject_pkey,
+ set[i].subject_attribute);
+ GNUNET_free (attr_str);
+ attr_str = tmp_str;
+ }
+ }
+ GNUNET_free (subject_pkey);
+ }
return attr_str;
}
case GNUNET_GNSRECORD_TYPE_CREDENTIAL:
{
- struct GNUNET_CREDENTIAL_CredentialRecordData cred;
- struct GNUNET_TIME_Absolute etime_abs;
+ struct GNUNET_CREDENTIAL_Credential *cred;
char *cred_str;
- char *subject_pkey;
- char *issuer_pkey;
- char *signature;
- const char *expiration;
-
- if (data_size < sizeof (struct GNUNET_CREDENTIAL_CredentialRecordData))
- return NULL; /* malformed */
- memcpy (&cred,
- data,
- sizeof (cred));
- cdata = data;
- subject_pkey = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred.subject_key);
- issuer_pkey = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred.issuer_key);
- etime_abs.abs_value_us = GNUNET_ntohll(cred.expiration);
- expiration = GNUNET_STRINGS_absolute_time_to_string (etime_abs);
- GNUNET_STRINGS_base64_encode ((char*)&cred.sig,
- sizeof (struct GNUNET_CRYPTO_EcdsaSignature),
- &signature);
- GNUNET_asprintf (&cred_str,
- "%s.%s -> %s | %s | %s",
- issuer_pkey,
- &cdata[sizeof (cred)],
- subject_pkey,
- signature,
- expiration);
- GNUNET_free (subject_pkey);
- GNUNET_free (issuer_pkey);
- GNUNET_free (signature);
+ cred = GNUNET_CREDENTIAL_credential_deserialize (data,
+ data_size);
+ cred_str = GNUNET_CREDENTIAL_credential_to_string (cred);
+ GNUNET_free (cred);
return cred_str;
}
+ case GNUNET_GNSRECORD_TYPE_POLICY:
+ {
+ return GNUNET_strndup (data,data_size);
+ }
default:
return NULL;
}
return GNUNET_SYSERR;
switch (type)
{
- case GNUNET_GNSRECORD_TYPE_CREDENTIAL:
- {
- struct GNUNET_CREDENTIAL_CredentialRecordData *cred;
-
- 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 name[253 + 1];
- char signature[128]; //TODO max payload size
- char expiration[256];
-
- struct GNUNET_CRYPTO_EcdsaSignature *sig;
- struct GNUNET_TIME_Absolute etime_abs;
-
- if (5 != SSCANF (s,
- "%52s.%253s -> %52s | %s | %255[0-9a-zA-Z: ]",
- issuer_pkey,
- name,
- subject_pkey,
- signature,
- expiration))
+ case GNUNET_GNSRECORD_TYPE_ATTRIBUTE:
+ {
+ struct GNUNET_CREDENTIAL_DelegationRecord *sets;
+ char attr_str[253 + 1];
+ char subject_pkey[52 + 1];
+ char *token;
+ char *tmp_str;
+ int matches = 0;
+ int entries;
+ size_t tmp_data_size;
+ int i;
+
+ tmp_str = GNUNET_strdup (s);
+ token = strtok (tmp_str, ",");
+ entries = 0;
+ tmp_data_size = 0;
+ *data_size = sizeof (struct GNUNET_CREDENTIAL_DelegationRecord);
+ while (NULL != token)
+ {
+ matches = SSCANF (token,
+ "%s %s",
+ subject_pkey,
+ attr_str);
+ if (0 == matches)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Unable to parse ATTR record string `%s'\n"),
+ s);
+ GNUNET_free (tmp_str);
+ return GNUNET_SYSERR;
+ }
+ if (1 == matches) {
+ tmp_data_size += sizeof (struct GNUNET_CREDENTIAL_DelegationRecordSet);
+ } else if (2 == matches) {
+ tmp_data_size += sizeof (struct GNUNET_CREDENTIAL_DelegationRecordSet) + strlen (attr_str) + 1;
+ }
+ entries++;
+ token = strtok (NULL, ",");
+ }
+ GNUNET_free (tmp_str);
+ tmp_str = GNUNET_strdup (s);
+ token = strtok (tmp_str, ",");
+ if (NULL == token)
{
+ GNUNET_free (tmp_str);
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Unable to parse CRED record string `%s'\n"),
- s);
+ "Malformed string %s\n", s);
return GNUNET_SYSERR;
}
- *data_size = sizeof (struct GNUNET_CREDENTIAL_CredentialRecordData) + strlen (name) + 1;
- *data = cred = GNUNET_malloc (*data_size);
- GNUNET_CRYPTO_ecdsa_public_key_from_string (subject_pkey,
- strlen (subject_pkey),
- &cred->subject_key);
- GNUNET_CRYPTO_ecdsa_public_key_from_string (issuer_pkey,
- strlen (issuer_pkey),
- &cred->issuer_key);
- GNUNET_STRINGS_fancy_time_to_absolute (expiration,
- &etime_abs);
- GNUNET_STRINGS_base64_decode (signature,
- strlen (signature),
- (char**)&sig);
- cred->sig = *sig;
- cred->expiration = GNUNET_htonll (etime_abs.abs_value_us);
- cred->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_CREDENTIAL);
- cred->purpose.size = htonl (strlen (name) + 1 + sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
- sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey) + sizeof (uint64_t));
- GNUNET_free (sig);
- GNUNET_memcpy (&cred[1],
- name,
- strlen (name));
+ struct GNUNET_CREDENTIAL_DelegationSet set[entries];
+ for (i=0;i<entries;i++)
+ {
+ matches = SSCANF (token,
+ "%s %s",
+ subject_pkey,
+ attr_str);
+ GNUNET_CRYPTO_ecdsa_public_key_from_string (subject_pkey,
+ strlen (subject_pkey),
+ &set[i].subject_key);
+ if (2 == matches) {
+ set[i].subject_attribute_len = strlen (attr_str) + 1;
+ set[i].subject_attribute = GNUNET_strdup (attr_str);
+ }
+ token = strtok (NULL , ",");
+ }
+ tmp_data_size = GNUNET_CREDENTIAL_delegation_set_get_size (entries,
+ set);
+ if (-1 == tmp_data_size)
+ {
+ GNUNET_free (tmp_str);
+ return GNUNET_SYSERR;
+ }
+ *data_size += tmp_data_size;
+ *data = sets = GNUNET_malloc (*data_size);
+ GNUNET_CREDENTIAL_delegation_set_serialize (entries,
+ set,
+ tmp_data_size,
+ (char*)&sets[1]);
+ for (i=0;i<entries;i++)
+ {
+ if (0 != set[i].subject_attribute_len)
+ GNUNET_free ((char*)set[i].subject_attribute);
+ }
+ sets->set_count = htonl (entries);
+ sets->data_size = GNUNET_htonll (tmp_data_size);
+ GNUNET_free (tmp_str);
+ return GNUNET_OK;
+ }
+ case GNUNET_GNSRECORD_TYPE_CREDENTIAL:
+ {
+ struct GNUNET_CREDENTIAL_Credential *cred;
+ cred = GNUNET_CREDENTIAL_credential_from_string (s);
+
+ *data_size = GNUNET_CREDENTIAL_credential_serialize (cred,
+ (char**)data);
+ return GNUNET_OK;
+ }
+ case GNUNET_GNSRECORD_TYPE_POLICY:
+ {
+ *data_size = strlen (s);
+ *data = GNUNET_strdup (s);
return GNUNET_OK;
}
default:
uint32_t number;
} name_map[] = {
{ "CRED", GNUNET_GNSRECORD_TYPE_CREDENTIAL },
+ { "ATTR", GNUNET_GNSRECORD_TYPE_ATTRIBUTE },
+ { "POLICY", GNUNET_GNSRECORD_TYPE_POLICY },
{ NULL, UINT32_MAX }
};
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