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22 * @file identity/plugin_gnsrecord_identity.c
23 * @brief gnsrecord plugin to provide the API for identity records
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_gnsrecord_lib.h"
29 #include "gnunet_gnsrecord_plugin.h"
33 * Convert the 'value' of a record to a string.
35 * @param cls closure, unused
36 * @param type type of the record
37 * @param data value in binary encoding
38 * @param data_size number of bytes in @a data
39 * @return NULL on error, otherwise human-readable representation of the value
42 value_to_string (void *cls,
47 const struct GNUNET_CRYPTO_EcdhePrivateKey *ecdhe_privkey;
48 const struct GNUNET_CRYPTO_EcdsaPublicKey *audience_pubkey;
56 case GNUNET_GNSRECORD_TYPE_ID_ATTR:
57 case GNUNET_GNSRECORD_TYPE_ID_TOKEN:
58 return GNUNET_strndup (data, data_size);
59 case GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA:
61 audience_pubkey = data+sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey);
62 scopes = (char*) audience_pubkey+(sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
63 ecdhe_str = GNUNET_STRINGS_data_to_string_alloc (ecdhe_privkey,
64 sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey));
65 aud_str = GNUNET_STRINGS_data_to_string_alloc (audience_pubkey,
66 sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
67 GNUNET_asprintf (&result,
69 ecdhe_str, aud_str, scopes);
70 GNUNET_free (aud_str);
71 GNUNET_free (ecdhe_str);
81 * Convert human-readable version of a 'value' of a record to the binary
84 * @param cls closure, unused
85 * @param type type of the record
86 * @param s human-readable string
87 * @param data set to value in binary encoding (will be allocated)
88 * @param data_size set to number of bytes in @a data
89 * @return #GNUNET_OK on success
92 string_to_value (void *cls,
105 return GNUNET_SYSERR;
108 case GNUNET_GNSRECORD_TYPE_ID_ATTR:
109 case GNUNET_GNSRECORD_TYPE_ID_TOKEN:
110 *data = GNUNET_strdup (s);
111 *data_size = strlen (s);
113 case GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA:
114 tmp_tok = GNUNET_strdup (s);
115 ecdhe_str = strtok (tmp_tok, ";");
116 if (NULL == ecdhe_str)
118 GNUNET_free (tmp_tok);
119 return GNUNET_SYSERR;
121 aud_keystr = strtok (NULL, ";");
122 if (NULL == aud_keystr)
124 GNUNET_free (tmp_tok);
125 return GNUNET_SYSERR;
127 str = strtok (NULL, ";");
130 GNUNET_free (tmp_tok);
131 return GNUNET_SYSERR;
133 *data_size = strlen (str) + 1
134 +sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey)
135 +sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
136 *data = GNUNET_malloc (*data_size);
139 GNUNET_STRINGS_string_to_data (ecdhe_str,
142 sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey));
143 write_ptr += sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey);
144 GNUNET_STRINGS_string_to_data (aud_keystr,
147 sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
148 write_ptr += sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
149 memcpy (write_ptr, str, strlen (str) + 1); //with 0-Terminator
150 GNUNET_free (tmp_tok);
154 return GNUNET_SYSERR;
160 * Mapping of record type numbers to human-readable
167 { "ID_ATTR", GNUNET_GNSRECORD_TYPE_ID_ATTR },
168 { "ID_TOKEN", GNUNET_GNSRECORD_TYPE_ID_TOKEN },
169 { "ID_TOKEN_METADATA", GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA },
175 * Convert a type name (i.e. "AAAA") to the corresponding number.
177 * @param cls closure, unused
178 * @param dns_typename name to convert
179 * @return corresponding number, UINT32_MAX on error
182 typename_to_number (void *cls,
183 const char *dns_typename)
188 while ( (NULL != name_map[i].name) &&
189 (0 != strcasecmp (dns_typename, name_map[i].name)) )
191 return name_map[i].number;
196 * Convert a type number (i.e. 1) to the corresponding type string (i.e. "A")
198 * @param cls closure, unused
199 * @param type number of a type to convert
200 * @return corresponding typestring, NULL on error
203 number_to_typename (void *cls,
209 while ( (NULL != name_map[i].name) &&
210 (type != name_map[i].number) )
212 return name_map[i].name;
217 * Entry point for the plugin.
220 * @return the exported block API
223 libgnunet_plugin_gnsrecord_identity_init (void *cls)
225 struct GNUNET_GNSRECORD_PluginFunctions *api;
227 api = GNUNET_new (struct GNUNET_GNSRECORD_PluginFunctions);
228 api->value_to_string = &value_to_string;
229 api->string_to_value = &string_to_value;
230 api->typename_to_number = &typename_to_number;
231 api->number_to_typename = &number_to_typename;
237 * Exit point from the plugin.
239 * @param cls the return value from #libgnunet_plugin_block_test_init
243 libgnunet_plugin_gnsrecord_identity_done (void *cls)
245 struct GNUNET_GNSRECORD_PluginFunctions *api = cls;
251 /* end of plugin_gnsrecord_dns.c */