GNUnet  0.11.x
Functions | Variables
plugin_reclaim_credential_pabc.c File Reference

reclaim-credential-plugin-pabc attribute plugin to provide the API for pabc credentials. More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_reclaim_plugin.h"
#include <inttypes.h>
#include <jansson.h>
#include <pabc/pabc.h>
#include "pabc_helper.h"
Include dependency graph for plugin_reclaim_credential_pabc.c:

Go to the source code of this file.

Functions

static char * pabc_value_to_string (void *cls, uint32_t type, const void *data, size_t data_size)
 Convert the 'value' of an credential to a string. More...
 
static int pabc_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 an credential to the binary representation. More...
 
static uint32_t pabc_typename_to_number (void *cls, const char *pabc_typename)
 Convert a type name to the corresponding number. More...
 
static const char * pabc_number_to_typename (void *cls, uint32_t type)
 Convert a type number (i.e. More...
 
static void inspect_attrs (char const *const key, char const *const value, void *ctx)
 
struct GNUNET_RECLAIM_AttributeListpabc_parse_attributes (void *cls, const char *data, size_t data_size)
 Parse a pabc and return the respective claim value as Attribute. More...
 
struct GNUNET_RECLAIM_AttributeListpabc_parse_attributes_c (void *cls, const struct GNUNET_RECLAIM_Credential *cred)
 Parse a pabc and return the respective claim value as Attribute. More...
 
struct GNUNET_RECLAIM_AttributeListpabc_parse_attributes_p (void *cls, const struct GNUNET_RECLAIM_Presentation *cred)
 Parse a pabc and return the respective claim value as Attribute. More...
 
char * pabc_get_issuer (void *cls, const char *data, size_t data_size)
 Parse a pabc and return the issuer. More...
 
char * pabc_get_issuer_c (void *cls, const struct GNUNET_RECLAIM_Credential *cred)
 Parse a pabc and return the issuer. More...
 
char * pabc_get_issuer_p (void *cls, const struct GNUNET_RECLAIM_Presentation *cred)
 Parse a pabc and return the issuer. More...
 
enum GNUNET_GenericReturnValue pabc_get_expiration (void *cls, const char *data, size_t data_size, struct GNUNET_TIME_Absolute *exp)
 Parse a pabc and return the expiration. More...
 
enum GNUNET_GenericReturnValue pabc_get_expiration_c (void *cls, const struct GNUNET_RECLAIM_Credential *cred, struct GNUNET_TIME_Absolute *exp)
 Parse a pabc and return the expiration. More...
 
enum GNUNET_GenericReturnValue pabc_get_expiration_p (void *cls, const struct GNUNET_RECLAIM_Presentation *cred, struct GNUNET_TIME_Absolute *exp)
 Parse a pabc and return the expiration. More...
 
int pabc_create_presentation (void *cls, const struct GNUNET_RECLAIM_Credential *credential, const struct GNUNET_RECLAIM_AttributeList *attrs, struct GNUNET_RECLAIM_Presentation **presentation)
 
void * libgnunet_plugin_reclaim_credential_pabc_init (void *cls)
 Entry point for the plugin. More...
 
void * libgnunet_plugin_reclaim_credential_pabc_done (void *cls)
 Exit point from the plugin. More...
 

Variables

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

Detailed Description

reclaim-credential-plugin-pabc attribute plugin to provide the API for pabc credentials.

Author
Martin Schanzenbach

Definition in file plugin_reclaim_credential_pabc.c.

Function Documentation

◆ pabc_value_to_string()

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

Convert the 'value' of an credential to a string.

Parameters
clsclosure, unused
typetype of the credential
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_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC, and GNUNET_strndup.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

50 {
51  switch (type)
52  {
54  return GNUNET_strndup (data, data_size);
55 
56  default:
57  return NULL;
58  }
59 }
static size_t data_size
Number of bytes in data.
Definition: gnunet-abd.c:187
#define GNUNET_strndup(a, length)
Wrapper around GNUNET_xstrndup_.
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
uint32_t data
The data value.
Here is the caller graph for this function:

◆ pabc_string_to_value()

static int pabc_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 an credential to the binary representation.

Parameters
clsclosure, unused
typetype of the credential
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 74 of file plugin_reclaim_credential_pabc.c.

References GNUNET_OK, GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC, GNUNET_strdup, and GNUNET_SYSERR.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

79 {
80  if (NULL == s)
81  return GNUNET_SYSERR;
82  switch (type)
83  {
85  *data = GNUNET_strdup (s);
86  *data_size = strlen (s) + 1;
87  return GNUNET_OK;
88 
89  default:
90  return GNUNET_SYSERR;
91  }
92 }
static size_t data_size
Number of bytes in data.
Definition: gnunet-abd.c:187
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
uint32_t data
The data value.
Here is the caller graph for this function:

◆ pabc_typename_to_number()

static uint32_t pabc_typename_to_number ( void *  cls,
const char *  pabc_typename 
)
static

Convert a type name to the corresponding number.

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

Definition at line 114 of file plugin_reclaim_credential_pabc.c.

References name, and pabc_cred_name_map.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

115 {
116  unsigned int i;
117 
118  i = 0;
119  while ((NULL != pabc_cred_name_map[i].name) &&
120  (0 != strcasecmp (pabc_typename, pabc_cred_name_map[i].name)))
121  i++;
122  return pabc_cred_name_map[i].number;
123 }
static struct @55 pabc_cred_name_map[]
Mapping of credential type numbers to human-readable credential type names.
const char * name
Here is the caller graph for this function:

◆ pabc_number_to_typename()

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

Convert a type number (i.e.

1) to the corresponding type string

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

Definition at line 134 of file plugin_reclaim_credential_pabc.c.

References name, number, and pabc_cred_name_map.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

135 {
136  unsigned int i;
137 
138  i = 0;
139  while ((NULL != pabc_cred_name_map[i].name) && (type !=
141  number))
142  i++;
143  return pabc_cred_name_map[i].name;
144 }
static struct @55 pabc_cred_name_map[]
Mapping of credential type numbers to human-readable credential type names.
const char * name
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model
Here is the caller graph for this function:

◆ inspect_attrs()

static void inspect_attrs ( char const *const  key,
char const *const  value,
void *  ctx 
)
static

Definition at line 148 of file plugin_reclaim_credential_pabc.c.

References ctx, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_RECLAIM_attribute_list_add(), and GNUNET_RECLAIM_ATTRIBUTE_TYPE_STRING.

Referenced by pabc_parse_attributes().

151 {
152  struct GNUNET_RECLAIM_AttributeList *attrs = ctx;
153 
154  if (NULL == value)
155  return;
157  "Found attribute in PABC credential: `%s': `%s'\n",
158  key, value);
159  if (0 == strcmp (key, "expiration"))
160  return;
161  if (0 == strcmp (key, "issuer"))
162  return;
163  if (0 == strcmp (key, "subject"))
164  return;
166  key,
167  NULL,
169  value,
170  strlen (value));
171 }
A list of GNUNET_RECLAIM_Attribute structures.
static struct GNUNET_DNSSTUB_Context * ctx
Context for DNS resolution.
static char * value
Value of the record to add/remove.
struct GNUNET_HashCode key
The key used in the DHT.
#define GNUNET_log(kind,...)
void GNUNET_RECLAIM_attribute_list_add(struct GNUNET_RECLAIM_AttributeList *attrs, const char *attr_name, const struct GNUNET_RECLAIM_Identifier *credential, uint32_t type, const void *data, size_t data_size)
Add a new attribute to a claim list.
Here is the call graph for this function:
Here is the caller graph for this function:

◆ pabc_parse_attributes()

struct GNUNET_RECLAIM_AttributeList* pabc_parse_attributes ( void *  cls,
const char *  data,
size_t  data_size 
)

Parse a pabc and return the respective claim value as Attribute.

Parameters
clsthe plugin
credthe pabc credential
Returns
a GNUNET_RECLAIM_Attribute, containing the new value

Definition at line 182 of file plugin_reclaim_credential_pabc.c.

References GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_new, and inspect_attrs().

Referenced by pabc_parse_attributes_c(), and pabc_parse_attributes_p().

185 {
186  struct GNUNET_RECLAIM_AttributeList *attrs;
187 
189  "Collecting PABC attributes...\n");
190  attrs = GNUNET_new (struct GNUNET_RECLAIM_AttributeList);
191  GNUNET_assert (PABC_OK ==
192  pabc_cred_inspect_credential (data,
193  &inspect_attrs, attrs));
194  return attrs;
195 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
A list of GNUNET_RECLAIM_Attribute structures.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
static void inspect_attrs(char const *const key, char const *const value, void *ctx)
#define GNUNET_log(kind,...)
uint32_t data
The data value.
Here is the call graph for this function:
Here is the caller graph for this function:

◆ pabc_parse_attributes_c()

struct GNUNET_RECLAIM_AttributeList* pabc_parse_attributes_c ( void *  cls,
const struct GNUNET_RECLAIM_Credential cred 
)

Parse a pabc and return the respective claim value as Attribute.

Parameters
clsthe plugin
credthe pabc credential
Returns
a GNUNET_RECLAIM_Attribute, containing the new value

Definition at line 206 of file plugin_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_Credential::data, GNUNET_RECLAIM_Credential::data_size, GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC, pabc_parse_attributes(), and GNUNET_RECLAIM_Credential::type.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

208 {
210  return NULL;
211  return pabc_parse_attributes (cls, cred->data, cred->data_size);
212 }
uint32_t type
Type/Format of Claim.
struct GNUNET_RECLAIM_AttributeList * pabc_parse_attributes(void *cls, const char *data, size_t data_size)
Parse a pabc and return the respective claim value as Attribute.
size_t data_size
Number of bytes in data.
const void * data
Binary value stored as credential value.
Here is the call graph for this function:
Here is the caller graph for this function:

◆ pabc_parse_attributes_p()

struct GNUNET_RECLAIM_AttributeList* pabc_parse_attributes_p ( void *  cls,
const struct GNUNET_RECLAIM_Presentation cred 
)

Parse a pabc and return the respective claim value as Attribute.

Parameters
clsthe plugin
credthe pabc credential
Returns
a GNUNET_RECLAIM_Attribute, containing the new value

Definition at line 223 of file plugin_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_Presentation::data, GNUNET_RECLAIM_Presentation::data_size, GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC, pabc_parse_attributes(), and GNUNET_RECLAIM_Presentation::type.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

225 {
227  return NULL;
228  return pabc_parse_attributes (cls, cred->data, cred->data_size);
229 }
uint32_t type
Type/Format of Claim.
struct GNUNET_RECLAIM_AttributeList * pabc_parse_attributes(void *cls, const char *data, size_t data_size)
Parse a pabc and return the respective claim value as Attribute.
const void * data
Binary value stored as presentation value.
size_t data_size
Number of bytes in data.
Here is the call graph for this function:
Here is the caller graph for this function:

◆ pabc_get_issuer()

char* pabc_get_issuer ( void *  cls,
const char *  data,
size_t  data_size 
)

Parse a pabc and return the issuer.

Parameters
clsthe plugin
credthe pabc credential
Returns
a string, containing the isser

Definition at line 240 of file plugin_reclaim_credential_pabc.c.

References res.

Referenced by pabc_get_issuer_c(), and pabc_get_issuer_p().

243 {
244  char *res;
245  if (PABC_OK != pabc_cred_get_attr_by_name_from_cred (data,
246  "issuer",
247  &res))
248  return NULL;
249  return res;
250 }
static int res
uint32_t data
The data value.
Here is the caller graph for this function:

◆ pabc_get_issuer_c()

char* pabc_get_issuer_c ( void *  cls,
const struct GNUNET_RECLAIM_Credential cred 
)

Parse a pabc and return the issuer.

Parameters
clsthe plugin
credthe pabc credential
Returns
a string, containing the isser

Definition at line 261 of file plugin_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_Credential::data, GNUNET_RECLAIM_Credential::data_size, GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC, pabc_get_issuer(), and GNUNET_RECLAIM_Credential::type.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init(), and pabc_create_presentation().

263 {
265  return NULL;
266  return pabc_get_issuer (cls, cred->data, cred->data_size);
267 }
uint32_t type
Type/Format of Claim.
size_t data_size
Number of bytes in data.
const void * data
Binary value stored as credential value.
char * pabc_get_issuer(void *cls, const char *data, size_t data_size)
Parse a pabc and return the issuer.
Here is the call graph for this function:
Here is the caller graph for this function:

◆ pabc_get_issuer_p()

char* pabc_get_issuer_p ( void *  cls,
const struct GNUNET_RECLAIM_Presentation cred 
)

Parse a pabc and return the issuer.

Parameters
clsthe plugin
credthe pabc credential
Returns
a string, containing the isser

Definition at line 278 of file plugin_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_Presentation::data, GNUNET_RECLAIM_Presentation::data_size, GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC, pabc_get_issuer(), and GNUNET_RECLAIM_Presentation::type.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

280 {
282  return NULL;
283  return pabc_get_issuer (cls, cred->data, cred->data_size);
284 }
uint32_t type
Type/Format of Claim.
const void * data
Binary value stored as presentation value.
size_t data_size
Number of bytes in data.
char * pabc_get_issuer(void *cls, const char *data, size_t data_size)
Parse a pabc and return the issuer.
Here is the call graph for this function:
Here is the caller graph for this function:

◆ pabc_get_expiration()

enum GNUNET_GenericReturnValue pabc_get_expiration ( void *  cls,
const char *  data,
size_t  data_size,
struct GNUNET_TIME_Absolute exp 
)

Parse a pabc and return the expiration.

Parameters
clsthe plugin
credthe pabc credential
Returns
a string, containing the isser

Definition at line 295 of file plugin_reclaim_credential_pabc.c.

References GNUNET_TIME_Absolute::abs_value_us, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_log, GNUNET_OK, and GNUNET_SYSERR.

Referenced by pabc_get_expiration_c(), and pabc_get_expiration_p().

299 {
300  char *exp_str;
301  uint64_t exp_i;
302 
303  if (PABC_OK != pabc_cred_get_attr_by_name_from_cred (data,
304  "expiration",
305  &exp_str))
306  return GNUNET_SYSERR;
307 
308  if (1 != sscanf (exp_str, "%llu", &exp_i))
309  {
311  "Invalid expiration `%s'\n", exp_str);
312  GNUNET_free (exp_str);
313  return GNUNET_SYSERR;
314  }
316  "Converted expiration string `%s' to %llu",
317  exp_str, exp_i);
318 
319  GNUNET_free (exp_str);
320  exp->abs_value_us = exp_i * 1000 * 1000;
321  return GNUNET_OK;
322 }
uint64_t abs_value_us
The actual value.
#define GNUNET_log(kind,...)
uint32_t data
The data value.
#define GNUNET_free(ptr)
Wrapper around free.
Here is the caller graph for this function:

◆ pabc_get_expiration_c()

enum GNUNET_GenericReturnValue pabc_get_expiration_c ( void *  cls,
const struct GNUNET_RECLAIM_Credential cred,
struct GNUNET_TIME_Absolute exp 
)

Parse a pabc and return the expiration.

Parameters
clsthe plugin
credthe pabc credential
Returns
a string, containing the isser

Definition at line 333 of file plugin_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_Credential::data, GNUNET_RECLAIM_Credential::data_size, GNUNET_NO, GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC, pabc_get_expiration(), and GNUNET_RECLAIM_Credential::type.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

336 {
338  return GNUNET_NO;
339  return pabc_get_expiration (cls, cred->data, cred->data_size, exp);
340 }
uint32_t type
Type/Format of Claim.
size_t data_size
Number of bytes in data.
const void * data
Binary value stored as credential value.
enum GNUNET_GenericReturnValue pabc_get_expiration(void *cls, const char *data, size_t data_size, struct GNUNET_TIME_Absolute *exp)
Parse a pabc and return the expiration.
Here is the call graph for this function:
Here is the caller graph for this function:

◆ pabc_get_expiration_p()

enum GNUNET_GenericReturnValue pabc_get_expiration_p ( void *  cls,
const struct GNUNET_RECLAIM_Presentation cred,
struct GNUNET_TIME_Absolute exp 
)

Parse a pabc and return the expiration.

Parameters
clsthe plugin
credthe pabc credential
Returns
a string, containing the isser

Definition at line 351 of file plugin_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_Presentation::data, GNUNET_RECLAIM_Presentation::data_size, GNUNET_NO, GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC, pabc_get_expiration(), and GNUNET_RECLAIM_Presentation::type.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

354 {
356  return GNUNET_NO;
357  return pabc_get_expiration (cls, cred->data, cred->data_size, exp);
358 }
uint32_t type
Type/Format of Claim.
enum GNUNET_GenericReturnValue pabc_get_expiration(void *cls, const char *data, size_t data_size, struct GNUNET_TIME_Absolute *exp)
Parse a pabc and return the expiration.
const void * data
Binary value stored as presentation value.
size_t data_size
Number of bytes in data.
Here is the call graph for this function:
Here is the caller graph for this function:

◆ pabc_create_presentation()

int pabc_create_presentation ( void *  cls,
const struct GNUNET_RECLAIM_Credential credential,
const struct GNUNET_RECLAIM_AttributeList attrs,
struct GNUNET_RECLAIM_Presentation **  presentation 
)

Definition at line 362 of file plugin_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_AttributeListEntry::attribute, ctx, GNUNET_RECLAIM_Credential::data, GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_log, GNUNET_NO, GNUNET_OK, GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC, GNUNET_RECLAIM_presentation_new(), GNUNET_STRINGS_base64_encode(), GNUNET_SYSERR, GNUNET_RECLAIM_AttributeList::list_head, GNUNET_RECLAIM_Attribute::name, GNUNET_RECLAIM_AttributeListEntry::next, pabc_get_issuer_c(), PABC_load_public_parameters(), PABC_read_usr_ctx(), proof, status, subject, and GNUNET_RECLAIM_Credential::type.

Referenced by libgnunet_plugin_reclaim_credential_pabc_init().

366 {
367  struct pabc_context *ctx = NULL;
368  struct pabc_user_context *usr_ctx = NULL;
369  struct pabc_public_parameters *pp = NULL;
370  struct pabc_credential *cred = NULL;
371  struct pabc_blinded_proof *proof = NULL;
373  char *issuer;
374  char *subject;
375  enum pabc_status status;
376 
377  if (GNUNET_RECLAIM_CREDENTIAL_TYPE_PABC != credential->type)
378  return GNUNET_NO;
379 
380 
381  PABC_ASSERT (pabc_new_ctx (&ctx));
382  issuer = pabc_get_issuer_c (cls, credential);
383  if (NULL == issuer)
384  {
386  "No issuer found in credential\n");
387  pabc_free_ctx (&ctx);
388  return GNUNET_SYSERR;
389  }
391  "Got issuer for credential: %s\n", issuer);
392  status = PABC_load_public_parameters (ctx, issuer, &pp);
393  if (status != PABC_OK)
394  {
396  "Failed to read public parameters.\n");
397  pabc_free_ctx (&ctx);
398  GNUNET_free (issuer);
399  return GNUNET_SYSERR;
400  }
401  if (PABC_OK != pabc_cred_get_attr_by_name_from_cred (credential->data,
402  "subject",
403  &subject))
404  {
406  "Failed to get subject.\n");
407  pabc_free_ctx (&ctx);
408  GNUNET_free (issuer);
409  return GNUNET_SYSERR;
410  }
411  status = PABC_read_usr_ctx (subject, issuer, ctx, pp, &usr_ctx);
412  GNUNET_free (issuer);
413  GNUNET_free (subject);
414  if (PABC_OK != status)
415  {
417  "Failed to read user context.\n");
418  pabc_free_public_parameters (ctx, &pp);
419  return GNUNET_SYSERR;
420  }
421 
422  status = pabc_new_credential (ctx, pp, &cred);
423  if (status != PABC_OK)
424  {
426  "Failed to allocate credential.\n");
427  pabc_free_user_context (ctx, pp, &usr_ctx);
428  pabc_free_public_parameters (ctx, &pp);
429  return GNUNET_SYSERR;
430  }
431 
432  status = pabc_decode_credential (ctx, pp, cred, credential->data);
433  if (status != PABC_OK)
434  {
436  "Failed to decode credential.\n");
437  pabc_free_credential (ctx, pp, &cred);
438  pabc_free_user_context (ctx, pp, &usr_ctx);
439  pabc_free_public_parameters (ctx, &pp);
440  return GNUNET_SYSERR;
441  }
442 
443  status = pabc_new_proof (ctx, pp, &proof);
444  if (status != PABC_OK)
445  {
447  "Failed to allocate proof.\n");
448  pabc_free_credential (ctx, pp, &cred);
449  pabc_free_user_context (ctx, pp, &usr_ctx);
450  pabc_free_public_parameters (ctx, &pp);
451  return GNUNET_SYSERR;
452  }
453 
454  // now we can parse the attributes to disclose and configure the proof
455  for (ale = attrs->list_head; NULL != ale; ale = ale->next)
456  {
457  status = pabc_set_disclosure_by_attribute_name (ctx, pp, proof,
458  ale->attribute->name,
459  PABC_DISCLOSED, cred);
460  if (status != PABC_OK)
461  {
463  "Failed to configure proof.\n");
464  pabc_free_credential (ctx, pp, &cred);
465  pabc_free_user_context (ctx, pp, &usr_ctx);
466  pabc_free_public_parameters (ctx, &pp);
467  return GNUNET_SYSERR;
468  }
469  }
470 
471  // and finally -> sign the proof
472  status = pabc_gen_proof (ctx, usr_ctx, pp, proof, cred);
473  if (status != PABC_OK)
474  {
476  "Failed to sign proof.\n");
477  pabc_free_proof (ctx, pp, &proof);
478  pabc_free_credential (ctx, pp, &cred);
479  pabc_free_user_context (ctx, pp, &usr_ctx);
480  pabc_free_public_parameters (ctx, &pp);
481  return GNUNET_SYSERR;
482  }
483  // print the result
484  char *json = NULL;
485  char *ppid = NULL;
486  char *userid = NULL;
487  GNUNET_assert (PABC_OK == pabc_cred_get_userid_from_cred (credential->data,
488  &userid));
489  GNUNET_assert (PABC_OK == pabc_cred_get_ppid_from_cred (credential->data,
490  &ppid));
491  pabc_cred_encode_proof (ctx, pp, proof, userid, ppid, &json);
492  GNUNET_free (ppid);
493  GNUNET_free (userid);
494  if (PABC_OK != status)
495  {
497  "Failed to serialize proof.\n");
498  pabc_free_proof (ctx, pp, &proof);
499  pabc_free_credential (ctx, pp, &cred);
500  pabc_free_user_context (ctx, pp, &usr_ctx);
501  pabc_free_public_parameters (ctx, &pp);
502  return GNUNET_SYSERR;
503  }
504  char *json_enc;
506  strlen (json) + 1,
507  &json_enc);
509  "Presentation: %s\n", json_enc);
510  // clean up
511  *presentation = GNUNET_RECLAIM_presentation_new (
513  json_enc,
514  strlen (json_enc) + 1);
515  GNUNET_free (json_enc);
516  PABC_FREE_NULL (json);
517  pabc_free_proof (ctx, pp, &proof);
518  pabc_free_credential (ctx, pp, &cred);
519  pabc_free_user_context (ctx, pp, &usr_ctx);
520  pabc_free_public_parameters (ctx, &pp);
521  return GNUNET_OK;
522 }
uint32_t type
Type/Format of Claim.
enum GNUNET_GenericReturnValue PABC_load_public_parameters(struct pabc_context *const ctx, char const *const pp_name, struct pabc_public_parameters **pp)
Definition: pabc_helper.c:134
const char * name
The name of the attribute.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
const void * data
Binary value stored as credential value.
char * pabc_get_issuer_c(void *cls, const struct GNUNET_RECLAIM_Credential *cred)
Parse a pabc and return the issuer.
static struct GNUNET_DNSSTUB_Context * ctx
Context for DNS resolution.
struct GNUNET_RECLAIM_Attribute * attribute
The attribute claim.
static uint64_t proof
Definition: gnunet-scrypt.c:48
uint16_t status
See PRISM_STATUS_*-constants.
size_t GNUNET_STRINGS_base64_encode(const void *in, size_t len, char **output)
Encode into Base64.
Definition: strings.c:1594
struct GNUNET_RECLAIM_AttributeListEntry * next
DLL.
static char * subject
Subject pubkey string.
Definition: gnunet-abd.c:86
struct GNUNET_RECLAIM_Presentation * GNUNET_RECLAIM_presentation_new(uint32_t type, const void *data, size_t data_size)
#define GNUNET_log(kind,...)
enum GNUNET_GenericReturnValue PABC_read_usr_ctx(char const *const usr_name, char const *const pp_name, struct pabc_context const *const ctx, struct pabc_public_parameters const *const pp, struct pabc_user_context **usr_ctx)
Definition: pabc_helper.c:294
struct GNUNET_RECLAIM_AttributeListEntry * list_head
List head.
#define GNUNET_free(ptr)
Wrapper around free.
Here is the call graph for this function:
Here is the caller graph for this function:

◆ libgnunet_plugin_reclaim_credential_pabc_init()

void* libgnunet_plugin_reclaim_credential_pabc_init ( void *  cls)

Entry point for the plugin.

Parameters
clsNULL
Returns
the exported block API

Definition at line 532 of file plugin_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_CredentialPluginFunctions::create_presentation, GNUNET_RECLAIM_CredentialPluginFunctions::get_attributes, GNUNET_RECLAIM_CredentialPluginFunctions::get_attributes_p, GNUNET_RECLAIM_CredentialPluginFunctions::get_expiration, GNUNET_RECLAIM_CredentialPluginFunctions::get_expiration_p, GNUNET_RECLAIM_CredentialPluginFunctions::get_issuer, GNUNET_RECLAIM_CredentialPluginFunctions::get_issuer_p, GNUNET_new, GNUNET_RECLAIM_CredentialPluginFunctions::number_to_typename, GNUNET_RECLAIM_CredentialPluginFunctions::number_to_typename_p, pabc_create_presentation(), pabc_get_expiration_c(), pabc_get_expiration_p(), pabc_get_issuer_c(), pabc_get_issuer_p(), pabc_number_to_typename(), pabc_parse_attributes_c(), pabc_parse_attributes_p(), pabc_string_to_value(), pabc_typename_to_number(), pabc_value_to_string(), GNUNET_RECLAIM_CredentialPluginFunctions::string_to_value, GNUNET_RECLAIM_CredentialPluginFunctions::string_to_value_p, GNUNET_RECLAIM_CredentialPluginFunctions::typename_to_number, GNUNET_RECLAIM_CredentialPluginFunctions::typename_to_number_p, GNUNET_RECLAIM_CredentialPluginFunctions::value_to_string, and GNUNET_RECLAIM_CredentialPluginFunctions::value_to_string_p.

533 {
535 
552  return api;
553 }
GNUNET_RECLAIM_PresentationTypenameToNumberFunction typename_to_number_p
Typename to number.
char * pabc_get_issuer_p(void *cls, const struct GNUNET_RECLAIM_Presentation *cred)
Parse a pabc and return the issuer.
GNUNET_RECLAIM_PresentationNumberToTypenameFunction number_to_typename_p
Number to typename.
enum GNUNET_GenericReturnValue pabc_get_expiration_p(void *cls, const struct GNUNET_RECLAIM_Presentation *cred, struct GNUNET_TIME_Absolute *exp)
Parse a pabc and return the expiration.
GNUNET_RECLAIM_PresentationGetIssuerFunction get_issuer_p
Attesation issuer.
GNUNET_RECLAIM_CredentialValueToStringFunction value_to_string
Conversion to string.
GNUNET_RECLAIM_CredentialGetExpirationFunction get_expiration
Expiration.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
char * pabc_get_issuer_c(void *cls, const struct GNUNET_RECLAIM_Credential *cred)
Parse a pabc and return the issuer.
GNUNET_RECLAIM_PresentationValueToStringFunction value_to_string_p
Conversion to string.
static uint32_t pabc_typename_to_number(void *cls, const char *pabc_typename)
Convert a type name to the corresponding number.
GNUNET_RECLAIM_CredentialGetIssuerFunction get_issuer
Attesation issuer.
GNUNET_RECLAIM_CredentialToPresentation create_presentation
Get presentation.
GNUNET_RECLAIM_PresentationGetAttributesFunction get_attributes_p
Attesation attributes.
GNUNET_RECLAIM_PresentationGetExpirationFunction get_expiration_p
Expiration.
enum GNUNET_GenericReturnValue pabc_get_expiration_c(void *cls, const struct GNUNET_RECLAIM_Credential *cred, struct GNUNET_TIME_Absolute *exp)
Parse a pabc and return the expiration.
Each plugin is required to return a pointer to a struct of this type as the return value from its ent...
struct GNUNET_RECLAIM_AttributeList * pabc_parse_attributes_c(void *cls, const struct GNUNET_RECLAIM_Credential *cred)
Parse a pabc and return the respective claim value as Attribute.
GNUNET_RECLAIM_CredentialTypenameToNumberFunction typename_to_number
Typename to number.
static const char * pabc_number_to_typename(void *cls, uint32_t type)
Convert a type number (i.e.
static int pabc_string_to_value(void *cls, uint32_t type, const char *s, void **data, size_t *data_size)
Convert human-readable version of a &#39;value&#39; of an credential to the binary representation.
GNUNET_RECLAIM_CredentialNumberToTypenameFunction number_to_typename
Number to typename.
GNUNET_RECLAIM_CredentialStringToValueFunction string_to_value
Conversion to binary.
GNUNET_RECLAIM_PresentationStringToValueFunction string_to_value_p
Conversion to binary.
static char * pabc_value_to_string(void *cls, uint32_t type, const void *data, size_t data_size)
Convert the &#39;value&#39; of an credential to a string.
int pabc_create_presentation(void *cls, const struct GNUNET_RECLAIM_Credential *credential, const struct GNUNET_RECLAIM_AttributeList *attrs, struct GNUNET_RECLAIM_Presentation **presentation)
struct GNUNET_RECLAIM_AttributeList * pabc_parse_attributes_p(void *cls, const struct GNUNET_RECLAIM_Presentation *cred)
Parse a pabc and return the respective claim value as Attribute.
GNUNET_RECLAIM_CredentialGetAttributesFunction get_attributes
Attesation attributes.
Here is the call graph for this function:

◆ libgnunet_plugin_reclaim_credential_pabc_done()

void* libgnunet_plugin_reclaim_credential_pabc_done ( void *  cls)

Exit point from the plugin.

Parameters
clsthe return value from libgnunet_plugin_block_test_init()
Returns
NULL

Definition at line 563 of file plugin_reclaim_credential_pabc.c.

References GNUNET_RECLAIM_CredentialPluginFunctions::cls, and GNUNET_free.

564 {
566 
567  GNUNET_free (api);
568  return NULL;
569 }
void * cls
Closure for all of the callbacks.
Each plugin is required to return a pointer to a struct of this type as the return value from its ent...
#define GNUNET_free(ptr)
Wrapper around free.

Variable Documentation

◆ name

const char* name

◆ number

uint32_t number

Definition at line 102 of file plugin_reclaim_credential_pabc.c.

Referenced by pabc_number_to_typename().

◆ pabc_cred_name_map

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

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

Referenced by pabc_number_to_typename(), and pabc_typename_to_number().