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implement mintdb API for mint to read auditor keys from disk -- and form auditor-sign tool to write them in the right format

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This commit is contained in:
Christian Grothoff 2015-09-17 14:13:41 +02:00
parent a8755be2b7
commit 690019c175
4 changed files with 333 additions and 43 deletions
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101
src/include/taler_mintdb_lib.h
View File

@ -37,6 +37,12 @@
*/
#define TALER_MINTDB_DIR_DENOMINATION_KEYS "denomkeys"
/**
* Subdirectory under the mint's base directory which contains
* the mint's auditing information.
*/
#define TALER_MINTDB_DIR_AUDITORS "auditors"
GNUNET_NETWORK_STRUCT_BEGIN
@ -123,23 +129,6 @@ typedef int
const struct TALER_MINTDB_PrivateSigningKeyInformationP *ski);
/**
* @brief Iterator over denomination keys.
*
* @param cls closure
* @param dki the denomination key
* @param alias coin alias
* @return #GNUNET_OK to continue to iterate,
* #GNUNET_NO to stop iteration with no error,
* #GNUNET_SYSERR to abort iteration with error!
*/
typedef int
(*TALER_MINTDB_DenominationKeyIterator)(void *cls,
const char *alias,
const struct TALER_MINTDB_DenominationKeyIssueInformation *dki);
/**
* Call @a it for each signing key found in the @a mint_base_dir.
*
@ -158,6 +147,23 @@ TALER_MINTDB_signing_keys_iterate (const char *mint_base_dir,
void *it_cls);
/**
* @brief Iterator over denomination keys.
*
* @param cls closure
* @param dki the denomination key
* @param alias coin alias
* @return #GNUNET_OK to continue to iterate,
* #GNUNET_NO to stop iteration with no error,
* #GNUNET_SYSERR to abort iteration with error!
*/
typedef int
(*TALER_MINTDB_DenominationKeyIterator)(void *cls,
const char *alias,
const struct TALER_MINTDB_DenominationKeyIssueInformation *dki);
/**
* Call @a it for each denomination key found in the @a mint_base_dir.
*
@ -201,6 +207,67 @@ TALER_MINTDB_denomination_key_read (const char *filename,
struct TALER_MINTDB_DenominationKeyIssueInformation *dki);
/**
* @brief Iterator over auditor information.
*
* @param cls closure
* @param apub the auditor's public key
* @param asig the auditor's signature
* @param mpub the mint's public key (as expected by the auditor)
* @param dki_len length of @a dki
* @param dki array of denomination coin data signed by the auditor
* @return #GNUNET_OK to continue to iterate,
* #GNUNET_NO to stop iteration with no error,
* #GNUNET_SYSERR to abort iteration with error!
*/
typedef int
(*TALER_MINTDB_AuditorIterator)(void *cls,
const struct TALER_AuditorPublicKeyP *apub,
const struct TALER_AuditorSignatureP *asig,
const struct TALER_MasterPublicKeyP *mpub,
unsigned int dki_len,
const struct TALER_DenominationKeyValidityPS *dki);
/**
* Call @a it with information for each auditor found in the @a mint_base_dir.
*
* @param mint_base_dir base directory for the mint,
* the signing keys must be in the #TALER_MINTDB_DIR_DENOMINATION_KEYS
* subdirectory
* @param it function to call with auditor information
* @param it_cls closure for @a it
* @return -1 on error, 0 if no files were found, otherwise
* a positive number (however, even with a positive
* number it is possible that @a it was never called
* as maybe none of the files were well-formed)
*/
int
TALER_MINTDB_auditor_iterate (const char *mint_base_dir,
TALER_MINTDB_AuditorIterator it,
void *it_cls);
/**
* Write auditor information to the given file.
*
* @param filename the file where to write the auditor information to
* @param apub the auditor's public key
* @param asig the auditor's signature
* @param mpub the mint's public key (as expected by the auditor)
* @param dki_len length of @a dki
* @param dki array of denomination coin data signed by the auditor
* @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure.
*/
int
TALER_MINTDB_auditor_write (const char *filename,
const struct TALER_AuditorPublicKeyP *apub,
const struct TALER_AuditorSignatureP *asig,
const struct TALER_MasterPublicKeyP *mpub,
unsigned int dki_len,
const struct TALER_DenominationKeyValidityPS *dki);
/**
* Initialize the plugin.
*

38
src/mint-tools/taler-auditor-sign.c
View File

@ -151,9 +151,10 @@ main (int argc,
};
struct GNUNET_CRYPTO_EddsaPrivateKey *eddsa_priv;
struct TALER_AuditorSignatureP sig;
struct TALER_AuditorPublicKeyP apub;
struct GNUNET_DISK_FileHandle *fh;
struct GNUNET_DISK_FileHandle *fout;
struct TALER_DenominationKeyValidityPS *dks;
unsigned int dks_len;
struct TALER_MintKeyValidityPS *ap;
off_t in_size;
unsigned int i;
@ -180,6 +181,8 @@ main (int argc,
auditor_key_file);
return 1;
}
GNUNET_CRYPTO_eddsa_key_get_public (eddsa_priv,
&apub.eddsa_pub);
if (NULL == mint_public_key)
{
fprintf (stderr,
@ -233,6 +236,7 @@ main (int argc,
GNUNET_DISK_file_close (fh);
return 1;
}
dks_len = in_size / sizeof (struct TALER_DenominationKeyValidityPS);
ap = GNUNET_malloc (sizeof (struct TALER_MintKeyValidityPS) +
in_size);
ap.purpose.purpose = htonl (TALER_SIGNATURE_AUDITOR_MINT_KEYS);
@ -256,7 +260,7 @@ main (int argc,
GNUNET_DISK_file_close (fh);
if (verbose)
{
for (i=0;i<in_size / sizeof (struct TALER_DenominationKeyValidityPS);i++)
for (i=0;i<dks_len;i++)
print_dk (&dks[i]);
}
@ -267,43 +271,29 @@ main (int argc,
GNUNET_free (ap);
return 1;
}
fout = GNUNET_DISK_file_open (output_file,
GNUNET_DISK_OPEN_READ |
GNUNET_DISK_OPEN_TRUNCATE |
GNUNET_DISK_OPEN_CREATE,
GNUNET_DISK_PERM_USER_READ |
GNUNET_DISK_PERM_USER_WRITE |
GNUNET_DISK_PERM_GROUP_READ |
GNUNET_DISK_PERM_OTHER_READ);
if (NULL == fout)
{
fprintf (stderr,
"Failed to open file `%s': %s\n",
output_file,
STRERROR (errno));
GNUNET_free (ap);
return 1;
}
/* Finally sign ... */
GNUNET_CRYPTO_eddsa_sign (eddsa_priv,
&ap->purpose,
&sig.eddsa_sig);
if (sizeof (struct TALER_AuditorSignatureP) !=
GNUNET_DISK_file_write (out,
/* write result to disk */
if (GNUNET_OK !=
TALER_MINTDB_auditor_write (output_file,
&apub,
&sig,
sizeof (sig)))
&master_public_key,
dks_len,
dks))
{
fprintf (stderr,
"Failed to write to file `%s': %s\n",
output_file,
STRERROR (errno));
GNUNET_free (ap);
GNUNET_DISK_file_close (output_file);
return 1;
}
GNUNET_free (ap);
GNUNET_DISK_file_close (out);
GNUNET_free (eddsa_priv);
return 0;
}

32
src/mint/taler-mint-httpd_keystate.c
View File

@ -407,6 +407,35 @@ reload_keys_sign_iter (void *cls,
}
/**
* @brief Iterator called with auditor information.
* Check that the @a mpub actually matches this mint, and then
* add the auditor information to our /keys response (if it is
* (still) applicable).
*
* @param cls closure
* @param apub the auditor's public key
* @param asig the auditor's signature
* @param mpub the mint's public key (as expected by the auditor)
* @param dki_len length of @a dki
* @param dki array of denomination coin data signed by the auditor
* @return #GNUNET_OK to continue to iterate,
* #GNUNET_NO to stop iteration with no error,
* #GNUNET_SYSERR to abort iteration with error!
*/
static int
reload_auditor_iter (void *cls,
const struct TALER_AuditorPublicKeyP *apub,
const struct TALER_AuditorSignatureP *asig,
const struct TALER_MasterPublicKeyP *mpub,
unsigned int dki_len,
const struct TALER_DenominationKeyValidityPS *dki)
{
GNUNET_break (0); // FIXME: not implemented: #3847
return GNUNET_SYSERR;
}
/**
* Iterator for freeing denomination keys.
*
@ -526,6 +555,9 @@ TMH_KS_acquire (void)
TALER_MINTDB_signing_keys_iterate (TMH_mint_directory,
&reload_keys_sign_iter,
key_state);
TALER_MINTDB_auditor_iterate (TMH_mint_directory,
&reload_auditor_iter,
key_state);
ks.purpose.size = htonl (sizeof (ks));
ks.purpose.purpose = htonl (TALER_SIGNATURE_MINT_KEY_SET);
ks.list_issue_date = GNUNET_TIME_absolute_hton (key_state->reload_time);

201
src/mintdb/mintdb_keyio.c
View File

@ -351,4 +351,205 @@ TALER_MINTDB_denomination_keys_iterate (const char *mint_base_dir,
}
/**
* Closure for #auditor_iter() and
*/
struct AuditorIterateContext
{
/**
* Function to call with the information for each auditor.
*/
TALER_MINTDB_AuditorIterator it;
/**
* Closure for @e it.
*/
void *it_cls;
};
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Header of a file with auditing information.
*/
struct AuditorFileHeaderP
{
/**
* Public key of the auditor.
*/
struct TALER_AuditorPublicKeyP apub;
/**
* Signature from the auditor.
*/
struct TALER_AuditorSignatureP asig;
/**
* Master public key of the mint the auditor is signing
* information for.
*/
struct TALER_MasterPublicKeyP mpub;
};
GNUNET_NETWORK_STRUCT_END
/**
* Load the auditor signature and the information signed by the
* auditor and call the callback in @a cls with the information.
*
* @param cls the `struct AuditorIterateContext *`
* @param filename name of a file that should contain
* a denomination key
* @return #GNUNET_OK to continue to iterate
* #GNUNET_NO to abort iteration with success
* #GNUNET_SYSERR to abort iteration with failure
*/
static int
auditor_iter (void *cls,
const char *filename)
{
struct AuditorIterateContext *aic = cls;
uint64_t size;
struct AuditorFileHeaderP *af;
const struct TALER_DenominationKeyValidityPS *dki;
unsigned int len;
int ret;
if (GNUNET_OK != GNUNET_DISK_file_size (filename,
&size,
GNUNET_YES,
GNUNET_YES))
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Skipping inaccessable auditor information file `%s'\n",
filename);
return GNUNET_SYSERR;
}
if ( (size < sizeof (struct AuditorFileHeaderP)) ||
(0 != (len = ((size - sizeof (struct AuditorFileHeaderP)) %
sizeof (struct TALER_DenominationKeyValidityPS)))) )
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
af = GNUNET_malloc (size);
if (size !=
GNUNET_DISK_fn_read (filename,
af,
size))
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
"read",
filename);
GNUNET_free (af);
return GNUNET_SYSERR;
}
dki = (const struct TALER_DenominationKeyValidityPS *) &af[1];
ret = aic->it (aic->it_cls,
&af->apub,
&af->asig,
&af->mpub,
len,
dki);
GNUNET_free (af);
return ret;
}
/**
* Call @a it with information for each auditor found in the @a mint_base_dir.
*
* @param mint_base_dir base directory for the mint,
* the signing keys must be in the #TALER_MINTDB_DIR_DENOMINATION_KEYS
* subdirectory
* @param it function to call with auditor information
* @param it_cls closure for @a it
* @return -1 on error, 0 if no files were found, otherwise
* a positive number (however, even with a positive
* number it is possible that @a it was never called
* as maybe none of the files were well-formed)
*/
int
TALER_MINTDB_auditor_iterate (const char *mint_base_dir,
TALER_MINTDB_AuditorIterator it,
void *it_cls)
{
char *dir;
struct AuditorIterateContext aic;
int ret;
GNUNET_asprintf (&dir,
"%s" DIR_SEPARATOR_STR TALER_MINTDB_DIR_AUDITORS,
mint_base_dir);
aic.it = it;
aic.it_cls = it_cls;
ret = GNUNET_DISK_directory_scan (dir,
&auditor_iter,
&aic);
GNUNET_free (dir);
return ret;
}
/**
* Write auditor information to the given file.
*
* @param filename the file where to write the auditor information to
* @param apub the auditor's public key
* @param asig the auditor's signature
* @param mpub the mint's public key (as expected by the auditor)
* @param dki_len length of @a dki
* @param dki array of denomination coin data signed by the auditor
* @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure.
*/
int
TALER_MINTDB_auditor_write (const char *filename,
const struct TALER_AuditorPublicKeyP *apub,
const struct TALER_AuditorSignatureP *asig,
const struct TALER_MasterPublicKeyP *mpub,
unsigned int dki_len,
const struct TALER_DenominationKeyValidityPS *dki)
{
struct AuditorFileHeaderP af;
struct GNUNET_DISK_FileHandle *fh;
ssize_t wrote;
size_t wsize;
int ret;
int eno;
af.apub = *apub;
af.asig = *asig;
af.mpub = *mpub;
ret = GNUNET_SYSERR;
if (NULL == (fh = GNUNET_DISK_file_open
(filename,
GNUNET_DISK_OPEN_WRITE | GNUNET_DISK_OPEN_CREATE | GNUNET_DISK_OPEN_TRUNCATE,
GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE)))
goto cleanup;
wsize = sizeof (struct AuditorFileHeaderP);
if (GNUNET_SYSERR == (wrote = GNUNET_DISK_file_write (fh,
&af,
wsize)))
goto cleanup;
if (wrote != wsize)
goto cleanup;
wsize = dki_len * sizeof (struct TALER_DenominationKeyValidityPS);
if (wsize ==
GNUNET_DISK_file_write (fh,
dki,
wsize))
ret = GNUNET_OK;
cleanup:
eno = errno;
if (NULL != fh)
(void) GNUNET_DISK_file_close (fh);
errno = eno;
return ret;
}
/* end of mintdb_keyio.c */