GNUnet 0.21.2
plugin_gnsrecord_abd.c File Reference

gnsrecord plugin to provide the API for ABD records More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "delegate_misc.h"
#include "abd_serialization.h"
#include "gnunet_abd_service.h"
#include "gnunet_gnsrecord_lib.h"
#include "gnunet_gnsrecord_plugin.h"
#include "gnunet_signatures.h"
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Functions

static char * abd_value_to_string (void *cls, uint32_t type, const void *data, size_t data_size)
 Convert the 'value' of a record to a string. More...
 
static int abd_string_to_value (void *cls, uint32_t type, const char *s, void **data, size_t *data_size)
 Convert human-readable version of a 'value' of a record to the binary representation. More...
 
static uint32_t abd_typename_to_number (void *cls, const char *gns_typename)
 Convert a type name (e.g. More...
 
static const char * abd_number_to_typename (void *cls, uint32_t type)
 Convert a type number to the corresponding type string (e.g. More...
 
void * libgnunet_plugin_gnsrecord_abd_init (void *cls)
 Entry point for the plugin. More...
 
void * libgnunet_plugin_gnsrecord_abd_done (void *cls)
 Exit point from the plugin. More...
 

Variables

struct {
   const char *   name
 
   uint32_t   number
 
name_map []
 Mapping of record type numbers to human-readable record type names. More...
 

Detailed Description

gnsrecord plugin to provide the API for ABD records

Author
Martin Schanzenbach

Definition in file plugin_gnsrecord_abd.c.

Function Documentation

◆ abd_value_to_string()

static char * abd_value_to_string ( void *  cls,
uint32_t  type,
const void *  data,
size_t  data_size 
)
static

Convert the 'value' of a record to a string.

Parameters
clsclosure, unused
typetype of the record
datavalue in binary encoding
data_sizenumber of bytes in data
Returns
NULL on error, otherwise human-readable representation of the value

Definition at line 46 of file plugin_gnsrecord_abd.c.

50{
51 const char *cdata;
52
53 switch (type)
54 {
56 {
58 char *attr_str;
59 char *subject_pkey;
60 char *tmp_str;
61 int i;
62 if (data_size < sizeof (struct GNUNET_ABD_DelegationRecord))
63 return NULL; /* malformed */
64
65 GNUNET_memcpy (&sets, data, sizeof (sets));
66 cdata = data;
67
68 struct GNUNET_ABD_DelegationSet set[ntohl (sets.set_count)];
69 if (GNUNET_OK !=
71 sets.data_size),
72 &cdata[sizeof (sets)],
73 ntohl (sets.set_count),
74 set))
75 return NULL;
76
77 for (i = 0; i < ntohl (sets.set_count); i++)
78 {
81
82 if (0 == set[i].subject_attribute_len)
83 {
84 if (0 == i)
85 {
86 GNUNET_asprintf (&attr_str, "%s", subject_pkey);
87 }
88 else
89 {
90 GNUNET_asprintf (&tmp_str, "%s,%s", attr_str, subject_pkey);
91 GNUNET_free (attr_str);
92 attr_str = tmp_str;
93 }
94 }
95 else
96 {
97 if (0 == i)
98 {
99 GNUNET_asprintf (&attr_str,
100 "%s %s",
102 set[i].subject_attribute);
103 }
104 else
105 {
106 GNUNET_asprintf (&tmp_str,
107 "%s,%s %s",
108 attr_str,
110 set[i].subject_attribute);
111 GNUNET_free (attr_str);
112 attr_str = tmp_str;
113 }
114 }
116 }
117 return attr_str;
118 }
120 {
121 struct GNUNET_ABD_Delegate *cred;
122 char *cred_str;
123
125 cred_str = GNUNET_ABD_delegate_to_string (cred);
126 GNUNET_free (cred);
127 return cred_str;
128 }
129 default:
130 return NULL;
131 }
132}
struct GNUNET_ABD_Delegate * GNUNET_ABD_delegate_deserialize(const char *data, size_t data_size)
int GNUNET_ABD_delegation_set_deserialize(size_t len, const char *src, unsigned int d_count, struct GNUNET_ABD_DelegationSet *dsr)
Deserialize the given destination.
char * GNUNET_ABD_delegate_to_string(const struct GNUNET_ABD_Delegate *cred)
Definition: delegate_misc.c:37
struct GNUNET_CRYPTO_PublicKey subject_pkey
Subject key.
Definition: gnunet-abd.c:102
static char * data
The data to insert into the dht.
static uint32_t type
Type string converted to DNS type value.
static size_t data_size
Number of bytes in data.
char * GNUNET_CRYPTO_public_key_to_string(const struct GNUNET_CRYPTO_PublicKey *key)
Creates a (Base32) string representation of the public key.
Definition: crypto_pkey.c:568
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:54
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_OK
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#define GNUNET_free(ptr)
Wrapper around free.
#define GNUNET_GNSRECORD_TYPE_ATTRIBUTE
For ABD reverse lookups.
#define GNUNET_GNSRECORD_TYPE_DELEGATE
For ABD policies.
The attribute delegation record.
The attribute delegation record.
const char * subject_attribute
The subject attribute.
struct GNUNET_CRYPTO_PublicKey subject_key
Public key of the subject this attribute was delegated to.

References data, data_size, GNUNET_ABD_DelegationRecord::data_size, GNUNET_ABD_delegate_deserialize(), GNUNET_ABD_delegate_to_string(), GNUNET_ABD_delegation_set_deserialize(), GNUNET_asprintf(), GNUNET_CRYPTO_public_key_to_string(), GNUNET_free, GNUNET_GNSRECORD_TYPE_ATTRIBUTE, GNUNET_GNSRECORD_TYPE_DELEGATE, GNUNET_memcpy, GNUNET_ntohll(), GNUNET_OK, GNUNET_ABD_DelegationRecord::set_count, GNUNET_ABD_DelegationSet::subject_attribute, GNUNET_ABD_DelegationSet::subject_attribute_len, GNUNET_ABD_DelegationSet::subject_key, subject_pkey, and type.

Referenced by libgnunet_plugin_gnsrecord_abd_init().

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◆ abd_string_to_value()

static int abd_string_to_value ( void *  cls,
uint32_t  type,
const char *  s,
void **  data,
size_t *  data_size 
)
static

Convert human-readable version of a 'value' of a record to the binary representation.

Parameters
clsclosure, unused
typetype of the record
shuman-readable string
dataset to value in binary encoding (will be allocated)
data_sizeset to number of bytes in data
Returns
GNUNET_OK on success

Definition at line 147 of file plugin_gnsrecord_abd.c.

152{
153 if (NULL == s)
154 return GNUNET_SYSERR;
155 switch (type)
156 {
158 {
159 struct GNUNET_ABD_DelegationRecord *sets;
160 char attr_str[253 + 1];
161 char subject_pkey[58 + 1];
162 char *token;
163 char *tmp_str;
164 int matches = 0;
165 int entries;
166 size_t tmp_data_size;
167 int i;
168
169 tmp_str = GNUNET_strdup (s);
170 token = strtok (tmp_str, ",");
171 entries = 0;
172 tmp_data_size = 0;
173 *data_size = sizeof (struct GNUNET_ABD_DelegationRecord);
174 while (NULL != token)
175 {
176 // also fills the variables subject_pley and attr_str if "regex"-like match
177 matches = sscanf (token, "%s %s", subject_pkey, attr_str);
178
179 if (0 == matches)
180 {
182 _ ("Unable to parse ATTR record string `%s'\n"),
183 s);
184 GNUNET_free (tmp_str);
185 return GNUNET_SYSERR;
186 }
187
188 entries++;
189 token = strtok (NULL, ",");
190 }
191 GNUNET_free (tmp_str);
192
193 tmp_str = GNUNET_strdup (s);
194 token = strtok (tmp_str, ",");
195 if (NULL == token)
196 {
197 GNUNET_free (tmp_str);
198 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Malformed string %s\n", s);
199 return GNUNET_SYSERR;
200 }
201
202 struct GNUNET_ABD_DelegationSet set[entries];
203 // sets memory to be 0, starting at *set for the size of struct * entries
204 memset (set, 0, sizeof (struct GNUNET_ABD_DelegationSet) * entries);
205 for (i = 0; i < entries; i++)
206 {
207 matches = sscanf (token, "%s %s", subject_pkey, attr_str);
208
209 // sets the public key for the set entry
210 if (GNUNET_SYSERR ==
212 &set[i].subject_key))
213 {
214 GNUNET_free (tmp_str);
215 return GNUNET_SYSERR;
216 }
217
218 // If not just key, also set subject attribute (Not A.a <- B but A.a <- B.b)
219 if (2 == matches)
220 {
221 set[i].subject_attribute_len = strlen (attr_str) + 1;
222 set[i].subject_attribute = GNUNET_strdup (attr_str);
223 }
224 // If more entries, then token string can take the next entry (separated by ',') by calling strtok again
225 token = strtok (NULL, ",");
226 }
227 tmp_data_size = GNUNET_ABD_delegation_set_get_size (entries, set);
228
229 if (-1 == tmp_data_size)
230 {
231 GNUNET_free (tmp_str);
232 return GNUNET_SYSERR;
233 }
234 *data_size += tmp_data_size;
235 *data = sets = GNUNET_malloc (*data_size);
237 set,
238 tmp_data_size,
239 (char *) &sets[1]);
240 for (i = 0; i < entries; i++)
241 {
242 if (0 != set[i].subject_attribute_len)
243 {
244 GNUNET_free_nz ((char *) set[i].subject_attribute);
245 set[i].subject_attribute = NULL;
246 }
247 }
248 sets->set_count = htonl (entries);
249 sets->data_size = GNUNET_htonll (tmp_data_size);
250
251 GNUNET_free (tmp_str);
252 return GNUNET_OK;
253 }
255 {
256 struct GNUNET_ABD_Delegate *cred;
258
259 *data_size = GNUNET_ABD_delegate_serialize (cred, (char **) data);
260 GNUNET_free (cred);
261 return GNUNET_OK;
262 }
263 default:
264 return GNUNET_SYSERR;
265 }
266}
size_t GNUNET_ABD_delegation_set_get_size(unsigned int ds_count, const struct GNUNET_ABD_DelegationSet *dsr)
Calculate how many bytes we will need to serialize the given delegation chain.
int GNUNET_ABD_delegate_serialize(struct GNUNET_ABD_Delegate *dele, char **data)
ssize_t GNUNET_ABD_delegation_set_serialize(unsigned int d_count, const struct GNUNET_ABD_DelegationSet *dsr, size_t dest_size, char *dest)
Serizalize the given delegation chain entries and abd.
struct GNUNET_ABD_Delegate * GNUNET_ABD_delegate_from_string(const char *s)
Definition: delegate_misc.c:80
#define GNUNET_log(kind,...)
uint64_t GNUNET_htonll(uint64_t n)
Convert unsigned 64-bit integer to network byte order.
Definition: common_endian.c:37
enum GNUNET_GenericReturnValue GNUNET_CRYPTO_public_key_from_string(const char *str, struct GNUNET_CRYPTO_PublicKey *key)
Parses a (Base32) string representation of the public key.
Definition: crypto_pkey.c:588
@ GNUNET_SYSERR
@ GNUNET_ERROR_TYPE_ERROR
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define GNUNET_malloc(size)
Wrapper around malloc.
#define GNUNET_free_nz(ptr)
Wrapper around free.
dictionary matches
#define _(String)
GNU gettext support macro.
Definition: platform.h:178
uint64_t data_size
Length of delegation sets.
uint32_t set_count
Number of delegation sets in this record.

References _, data, data_size, GNUNET_ABD_DelegationRecord::data_size, GNUNET_ABD_delegate_from_string(), GNUNET_ABD_delegate_serialize(), GNUNET_ABD_delegation_set_get_size(), GNUNET_ABD_delegation_set_serialize(), GNUNET_CRYPTO_public_key_from_string(), GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_free_nz, GNUNET_GNSRECORD_TYPE_ATTRIBUTE, GNUNET_GNSRECORD_TYPE_DELEGATE, GNUNET_htonll(), GNUNET_log, GNUNET_malloc, GNUNET_OK, GNUNET_strdup, GNUNET_SYSERR, warningfilter::matches, GNUNET_ABD_DelegationRecord::set_count, GNUNET_ABD_DelegationSet::subject_attribute, GNUNET_ABD_DelegationSet::subject_attribute_len, GNUNET_ABD_DelegationSet::subject_key, subject_pkey, and type.

Referenced by libgnunet_plugin_gnsrecord_abd_init().

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◆ abd_typename_to_number()

static uint32_t abd_typename_to_number ( void *  cls,
const char *  gns_typename 
)
static

Convert a type name (e.g.

"AAAA") to the corresponding number.

Parameters
clsclosure, unused
gns_typenamename to convert
Returns
corresponding number, UINT32_MAX on error

Definition at line 290 of file plugin_gnsrecord_abd.c.

291{
292 unsigned int i;
293
294 i = 0;
295 while ((name_map[i].name != NULL) &&
296 (0 != strcasecmp (gns_typename, name_map[i].name)))
297 i++;
298 return name_map[i].number;
299}
const char * name
static struct @0 name_map[]
Mapping of record type numbers to human-readable record type names.

References name, and name_map.

Referenced by libgnunet_plugin_gnsrecord_abd_init().

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◆ abd_number_to_typename()

static const char * abd_number_to_typename ( void *  cls,
uint32_t  type 
)
static

Convert a type number to the corresponding type string (e.g.

1 to "A")

Parameters
clsclosure, unused
typenumber of a type to convert
Returns
corresponding typestring, NULL on error

Definition at line 310 of file plugin_gnsrecord_abd.c.

311{
312 unsigned int i;
313
314 i = 0;
315 while ((name_map[i].name != NULL) && (type != name_map[i].number))
316 i++;
317 return name_map[i].name;
318}
uint32_t number

References name, name_map, number, and type.

Referenced by libgnunet_plugin_gnsrecord_abd_init().

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◆ libgnunet_plugin_gnsrecord_abd_init()

void * libgnunet_plugin_gnsrecord_abd_init ( void *  cls)

Entry point for the plugin.

Parameters
clsNULL
Returns
the exported block API

Definition at line 328 of file plugin_gnsrecord_abd.c.

329{
331
337 return api;
338}
#define GNUNET_new(type)
Allocate a struct or union of the given type.
static const char * abd_number_to_typename(void *cls, uint32_t type)
Convert a type number to the corresponding type string (e.g.
static int abd_string_to_value(void *cls, uint32_t type, const char *s, void **data, size_t *data_size)
Convert human-readable version of a 'value' of a record to the binary representation.
static char * abd_value_to_string(void *cls, uint32_t type, const void *data, size_t data_size)
Convert the 'value' of a record to a string.
static uint32_t abd_typename_to_number(void *cls, const char *gns_typename)
Convert a type name (e.g.
Each plugin is required to return a pointer to a struct of this type as the return value from its ent...
GNUNET_GNSRECORD_TypenameToNumberFunction typename_to_number
Typename to number.
GNUNET_GNSRECORD_NumberToTypenameFunction number_to_typename
Number to typename.
GNUNET_GNSRECORD_ValueToStringFunction value_to_string
Conversion to string.
GNUNET_GNSRECORD_StringToValueFunction string_to_value
Conversion to binary.

References abd_number_to_typename(), abd_string_to_value(), abd_typename_to_number(), abd_value_to_string(), GNUNET_new, GNUNET_GNSRECORD_PluginFunctions::number_to_typename, GNUNET_GNSRECORD_PluginFunctions::string_to_value, GNUNET_GNSRECORD_PluginFunctions::typename_to_number, and GNUNET_GNSRECORD_PluginFunctions::value_to_string.

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◆ libgnunet_plugin_gnsrecord_abd_done()

void * libgnunet_plugin_gnsrecord_abd_done ( void *  cls)

Exit point from the plugin.

Parameters
clsthe return value from libgnunet_plugin_block_test_init
Returns
NULL

Definition at line 348 of file plugin_gnsrecord_abd.c.

349{
351
352 GNUNET_free (api);
353 return NULL;
354}
void * cls
Closure for all of the callbacks.

References GNUNET_GNSRECORD_PluginFunctions::cls, and GNUNET_free.

Variable Documentation

◆ name

const char* name

Definition at line 275 of file plugin_gnsrecord_abd.c.

Referenced by abd_number_to_typename(), and abd_typename_to_number().

◆ number

◆ 

struct { ... } name_map[]
Initial value:
{NULL, UINT32_MAX}}

Mapping of record type numbers to human-readable record type names.

Referenced by abd_number_to_typename(), and abd_typename_to_number().