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Verify index-meta for in-memory sync

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This commit is contained in:
Piotr Wójcik 2019-10-01 21:18:25 +02:00 committed by Juan RP
parent 61ef5c3f8a
commit a1481cb285
3 changed files with 38 additions and 6 deletions
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1
include/xbps_api_impl.h
View File

@ -150,6 +150,7 @@ void HIDDEN xbps_transaction_conflicts(struct xbps_handle *, xbps_array_t);
char HIDDEN *xbps_archive_get_file(struct archive *, struct archive_entry *);
xbps_dictionary_t HIDDEN xbps_archive_get_dictionary(struct archive *,
struct archive_entry *, char **bytes);
xbps_dictionary_t HIDDEN get_safe_idxmeta(xbps_dictionary_t full);
const char HIDDEN *vpkg_user_conf(struct xbps_handle *, const char *, bool);
xbps_array_t HIDDEN xbps_get_pkg_fulldeptree(struct xbps_handle *,
const char *, bool);

27
lib/plist_fetch.c
View File

@ -180,8 +180,13 @@ xbps_repo_fetch_remote(struct xbps_repo *repo, const char *url)
{
struct archive *a;
struct archive_entry *entry;
xbps_dictionary_t idxmeta_tmp = NULL;
size_t meta_signature_len = 0;
uint8_t i = 0;
bool verified = false;
const char *signature_type = NULL;
unsigned char *meta_digest = NULL;
unsigned char *meta_signature = NULL;
assert(url);
assert(repo);
@ -199,9 +204,14 @@ xbps_repo_fetch_remote(struct xbps_repo *repo, const char *url)
if (strcmp(bfile, XBPS_REPOIDX_META) == 0) {
buf = xbps_archive_get_file(a, entry);
repo->idxmeta = xbps_dictionary_internalize(buf);
meta_digest = xbps_buffer_hash_raw(buf, strlen(buf));
idxmeta_tmp = xbps_dictionary_internalize(buf);
free(buf);
i++;
} else if (strcmp(bfile, XBPS_REPOIDXMETA_SIG) == 0) {
meta_signature = (unsigned char *) xbps_archive_get_file(a, entry);
meta_signature_len = (size_t) archive_entry_size(entry);
i++;
} else if (strcmp(bfile, XBPS_REPOIDX) == 0) {
buf = xbps_archive_get_file(a, entry);
repo->idx = xbps_dictionary_internalize(buf);
@ -210,17 +220,30 @@ xbps_repo_fetch_remote(struct xbps_repo *repo, const char *url)
} else {
archive_read_data_skip(a);
}
if (i == 2)
if (i == 3)
break;
}
archive_read_finish(a);
verified = xbps_verify_digest_signature(repo, idxmeta_tmp, meta_signature, meta_signature_len, meta_digest);
if (verified) {
xbps_dbg_printf(repo->xhp, "Verification of repo's '%s' signature passed.\n", url);
} else {
xbps_warn_printf("Verification of repo's '%s' signature failed. Taking safe part.\n", url);
idxmeta_tmp = get_safe_idxmeta(idxmeta_tmp);
}
repo->idxmeta = idxmeta_tmp;
if (xbps_dictionary_get_cstring_nocopy(repo->idxmeta, "signature-type", &signature_type))
repo->is_signed = true;
if (xbps_object_type(repo->idx) == XBPS_TYPE_DICTIONARY)
return true;
free(meta_digest);
free(meta_signature);
return false;
}

14
lib/repo.c
View File

@ -126,7 +126,7 @@ repo_get_dict(struct xbps_repo *repo, int *verify_error)
}
static xbps_dictionary_t
xbps_dictionary_t HIDDEN
get_safe_idxmeta(xbps_dictionary_t full) {
static const char *keys[] = {
"public-key",
@ -134,14 +134,22 @@ get_safe_idxmeta(xbps_dictionary_t full) {
"signature-by",
"signature-type",
};
unsigned fields_count = (sizeof keys)/(sizeof *keys);
xbps_dictionary_t safe = xbps_dictionary_create();
static const unsigned fields_count = (sizeof keys)/(sizeof *keys);
xbps_dictionary_t safe = NULL;
if (full == NULL) {
return NULL;
}
safe = xbps_dictionary_create();
for (unsigned i = 0; i < fields_count; ++i) {
const char *key = keys[i];
xbps_object_t value = xbps_dictionary_get(full, key);
if (value != NULL) {
xbps_dictionary_set(safe, key, value);
}
}
return safe;
}