diff options
Diffstat (limited to 'src/mintdb/mintdb_keyio.c')
| -rw-r--r-- | src/mintdb/mintdb_keyio.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/mintdb/mintdb_keyio.c b/src/mintdb/mintdb_keyio.c index 7cf77558b..5bfe5bb12 100644 --- a/src/mintdb/mintdb_keyio.c +++ b/src/mintdb/mintdb_keyio.c @@ -351,4 +351,208 @@ 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; + + /** + * 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_AuditorSignatureP *sigs; + 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) + + sizeof (struct TALER_AuditorSignatureP))))) ) + { + 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; + } + sigs = (const struct TALER_AuditorSignatureP *) &af[1]; + dki = (const struct TALER_DenominationKeyValidityPS *) &sigs[len]; + ret = aic->it (aic->it_cls, + &af->apub, + &af->mpub, + len, + sigs, + 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 asigs the auditor's signatures, array of length @a dki_len + * @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 *asigs, + 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.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_AuditorSignatureP); + if (wsize == + GNUNET_DISK_file_write (fh, + asigs, + wsize)) + ret = GNUNET_OK; + 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 */ |