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authorDan McGee <dan@archlinux.org>2011-04-21 19:01:06 -0500
committerDan McGee <dan@archlinux.org>2011-04-24 10:48:33 -0500
commit31e55b8049ed001a993441f3efc8ffebdf360061 (patch)
treeef01f59eed8cdbf5d5e9f76c1500b9ef30ed67e9 /lib/libalpm/signing.c
parenta7d33d0c36420462b3de5c7e2f8327ddbda2a129 (diff)
signing: let GPGME handle loading signatures from files
Rather than go through all the hassle of doing this ourselves, just let GPGME handle the work by passing it a file handle. Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'lib/libalpm/signing.c')
-rw-r--r--lib/libalpm/signing.c94
1 files changed, 35 insertions, 59 deletions
diff --git a/lib/libalpm/signing.c b/lib/libalpm/signing.c
index 9d4fd076..28b7ad98 100644
--- a/lib/libalpm/signing.c
+++ b/lib/libalpm/signing.c
@@ -92,9 +92,10 @@ error:
}
/**
- * Check the PGP package signature for the given file.
+ * Check the PGP signature for the given file.
* @param path the full path to a file
- * @param sig PGP signature data in raw form (already decoded)
+ * @param sig PGP signature data in raw form (already decoded); if NULL, expect
+ * a signature file next to 'path'
* @return a int value : 0 (valid), 1 (invalid), -1 (an error occured)
*/
int _alpm_gpgme_checksig(const char *path, const pmpgpsig_t *sig)
@@ -105,16 +106,28 @@ int _alpm_gpgme_checksig(const char *path, const pmpgpsig_t *sig)
gpgme_data_t filedata, sigdata;
gpgme_verify_result_t result;
gpgme_signature_t gpgsig;
+ char *sigpath = NULL;
FILE *file = NULL, *sigfile = NULL;
ALPM_LOG_FUNC;
- if(!sig || !sig->data) {
- RET_ERR(PM_ERR_SIG_UNKNOWN, -1);
- }
if(!path || access(path, R_OK) != 0) {
RET_ERR(PM_ERR_NOT_A_FILE, -1);
}
+
+ if(!sig) {
+ size_t len = strlen(path) + 5;
+ CALLOC(sigpath, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, -1));
+ snprintf(sigpath, len, "%s.sig", path);
+
+ if(!access(sigpath, R_OK) == 0) {
+ FREE(sigpath);
+ RET_ERR(PM_ERR_SIG_UNKNOWN, -1);
+ }
+ } else if(!sig->data) {
+ RET_ERR(PM_ERR_SIG_UNKNOWN, -1);
+ }
+
if(gpgme_init()) {
/* pm_errno was set in gpgme_init() */
return -1;
@@ -140,7 +153,19 @@ int _alpm_gpgme_checksig(const char *path, const pmpgpsig_t *sig)
CHECK_ERR();
/* next create data object for the signature */
- err = gpgme_data_new_from_mem(&sigdata, (char *)sig->data, sig->len, 0);
+ if(sig) {
+ /* memory-based, we loaded it from a sync DB */
+ err = gpgme_data_new_from_mem(&sigdata, (char *)sig->data, sig->len, 0);
+ } else {
+ /* file-based, it is on disk */
+ sigfile = fopen(sigpath, "rb");
+ if(sigfile == NULL) {
+ pm_errno = PM_ERR_NOT_A_FILE;
+ ret = -1;
+ goto error;
+ }
+ err = gpgme_data_new_from_stream(&sigdata, sigfile);
+ }
CHECK_ERR();
/* here's where the magic happens */
@@ -196,6 +221,7 @@ error:
if(file) {
fclose(file);
}
+ FREE(sigpath);
if(err != GPG_ERR_NO_ERROR) {
_alpm_log(PM_LOG_ERROR, _("GPGME error: %s\n"), gpgme_strerror(err));
RET_ERR(PM_ERR_GPGME, -1);
@@ -204,55 +230,6 @@ error:
}
/**
- * Load the signature from the given path into the provided struct.
- * @param sigfile the signature to attempt to load
- * @param pgpsig the struct to place the data in
- *
- * @return 0 on success, 1 on file not found, -1 on error
- */
-int _alpm_load_signature(const char *file, pmpgpsig_t *pgpsig) {
- struct stat st;
- char *sigfile;
- int ret = -1;
-
- /* look around for a PGP signature file; load if available */
- MALLOC(sigfile, strlen(file) + 5, RET_ERR(PM_ERR_MEMORY, -1));
- sprintf(sigfile, "%s.sig", file);
-
- if(access(sigfile, R_OK) == 0 && stat(sigfile, &st) == 0) {
- FILE *f;
- size_t bytes_read;
-
- if(st.st_size > 4096 || (f = fopen(sigfile, "rb")) == NULL) {
- free(sigfile);
- return ret;
- }
- CALLOC(pgpsig->data, st.st_size, sizeof(unsigned char),
- RET_ERR(PM_ERR_MEMORY, -1));
- bytes_read = fread(pgpsig->data, sizeof(char), st.st_size, f);
- if(bytes_read == (size_t)st.st_size) {
- pgpsig->len = bytes_read;
- _alpm_log(PM_LOG_DEBUG, "loaded gpg signature file, location %s\n",
- sigfile);
- ret = 0;
- } else {
- _alpm_log(PM_LOG_WARNING, _("Failed reading PGP signature file %s"),
- sigfile);
- FREE(pgpsig->data);
- }
-
- fclose(f);
- } else {
- _alpm_log(PM_LOG_DEBUG, "signature file %s not found\n", sigfile);
- /* not fatal...we return a different error code here */
- ret = 1;
- }
-
- free(sigfile);
- return ret;
-}
-
-/**
* Determines the necessity of checking for a valid PGP signature
* @param db the sync database to query
*
@@ -271,7 +248,7 @@ pgp_verify_t _alpm_db_get_sigverify_level(pmdb_t *db)
}
/**
- * Check the PGP package signature for the given package file.
+ * Check the PGP signature for the given package file.
* @param pkg the package to check
* @return a int value : 0 (valid), 1 (invalid), -1 (an error occurred)
*/
@@ -285,7 +262,7 @@ int SYMEXPORT alpm_pkg_check_pgp_signature(pmpkg_t *pkg)
}
/**
- * Check the PGP package signature for the given database.
+ * Check the PGP signature for the given database.
* @param db the database to check
* @return a int value : 0 (valid), 1 (invalid), -1 (an error occurred)
*/
@@ -294,8 +271,7 @@ int SYMEXPORT alpm_db_check_pgp_signature(pmdb_t *db)
ALPM_LOG_FUNC;
ASSERT(db != NULL, return 0);
- return _alpm_gpgme_checksig(_alpm_db_path(db),
- _alpm_db_pgpsig(db));
+ return _alpm_gpgme_checksig(_alpm_db_path(db), NULL);
}
/* vim: set ts=2 sw=2 noet: */