The precedence goes as follows: signature > sha256sum > md5sum Add some logic and helper methods to check what we have available when loading a package, and then only check what is necessary to verify the package. This should speed up sync database verifies as we no longer will be doing both a checksum and a signature validation.
Signed-off-by: Dan McGee <[email protected]> --- lib/libalpm/be_package.c | 22 +++++++++++++++++----- lib/libalpm/be_sync.c | 2 +- lib/libalpm/db.c | 14 -------------- lib/libalpm/db.h | 1 - lib/libalpm/signing.c | 34 +++++++++++++++++++++++++++------- lib/libalpm/signing.h | 1 + 6 files changed, 46 insertions(+), 28 deletions(-) diff --git a/lib/libalpm/be_package.c b/lib/libalpm/be_package.c index 9762cbc..cbc9b36 100644 --- a/lib/libalpm/be_package.c +++ b/lib/libalpm/be_package.c @@ -285,8 +285,7 @@ alpm_pkg_t *_alpm_pkg_load_internal(alpm_handle_t *handle, const char *pkgfile, int full, const char *md5sum, const char *sha256sum, const char *base64_sig, alpm_siglevel_t level) { - int ret; - int config = 0; + int ret, skip_checksums, config = 0; struct archive *archive; struct archive_entry *entry; alpm_pkg_t *newpkg = NULL; @@ -311,9 +310,22 @@ alpm_pkg_t *_alpm_pkg_load_internal(alpm_handle_t *handle, const char *pkgfile, RET_ERR(handle, ALPM_ERR_PKG_OPEN, NULL); } - /* first steps- validate the package file */ + /* can we get away with skipping checksums? */ + skip_checksums = 0; + if(level & ALPM_SIG_PACKAGE) { + if(base64_sig) { + skip_checksums = 1; + } else { + char *sigpath = _alpm_sigpath(handle, pkgfile); + if(sigpath && !_alpm_access(handle, NULL, sigpath, R_OK)) { + skip_checksums = 1; + } + free(sigpath); + } + } + _alpm_log(handle, ALPM_LOG_DEBUG, "md5sum: %s\n", md5sum); - if(md5sum) { + if(!skip_checksums && md5sum && !sha256sum) { _alpm_log(handle, ALPM_LOG_DEBUG, "checking md5sum for %s\n", pkgfile); if(_alpm_test_checksum(pkgfile, md5sum, ALPM_CSUM_MD5) != 0) { alpm_pkg_free(newpkg); @@ -322,7 +334,7 @@ alpm_pkg_t *_alpm_pkg_load_internal(alpm_handle_t *handle, const char *pkgfile, } _alpm_log(handle, ALPM_LOG_DEBUG, "sha256sum: %s\n", sha256sum); - if(sha256sum) { + if(!skip_checksums && sha256sum) { _alpm_log(handle, ALPM_LOG_DEBUG, "checking sha256sum for %s\n", pkgfile); if(_alpm_test_checksum(pkgfile, sha256sum, ALPM_CSUM_SHA256) != 0) { alpm_pkg_free(newpkg); diff --git a/lib/libalpm/be_sync.c b/lib/libalpm/be_sync.c index 069e39d..d0cabdf 100644 --- a/lib/libalpm/be_sync.c +++ b/lib/libalpm/be_sync.c @@ -192,7 +192,7 @@ int SYMEXPORT alpm_db_update(int force, alpm_db_t *db) if(ret == 0 && (level & ALPM_SIG_DATABASE)) { /* an existing sig file is no good at this point */ - char *sigpath = _alpm_db_sig_path(db); + char *sigpath = _alpm_sigpath(handle, _alpm_db_path(db)); if(!sigpath) { ret = -1; break; diff --git a/lib/libalpm/db.c b/lib/libalpm/db.c index 9e8e75b..4dbedb9 100644 --- a/lib/libalpm/db.c +++ b/lib/libalpm/db.c @@ -375,20 +375,6 @@ const char *_alpm_db_path(alpm_db_t *db) return db->_path; } -char *_alpm_db_sig_path(alpm_db_t *db) -{ - char *sigpath; - size_t len; - const char *dbfile = _alpm_db_path(db); - if(!db || !dbfile) { - return NULL; - } - len = strlen(dbfile) + strlen(".sig") + 1; - CALLOC(sigpath, len, sizeof(char), RET_ERR(db->handle, ALPM_ERR_MEMORY, NULL)); - sprintf(sigpath, "%s.sig", dbfile); - return sigpath; -} - int _alpm_db_cmp(const void *d1, const void *d2) { alpm_db_t *db1 = (alpm_db_t *)d1; diff --git a/lib/libalpm/db.h b/lib/libalpm/db.h index a09c7e2..2938b54 100644 --- a/lib/libalpm/db.h +++ b/lib/libalpm/db.h @@ -80,7 +80,6 @@ struct __alpm_db_t { alpm_db_t *_alpm_db_new(const char *treename, int is_local); void _alpm_db_free(alpm_db_t *db); const char *_alpm_db_path(alpm_db_t *db); -char *_alpm_db_sig_path(alpm_db_t *db); int _alpm_db_cmp(const void *d1, const void *d2); alpm_list_t *_alpm_db_search(alpm_db_t *db, const alpm_list_t *needles); alpm_db_t *_alpm_db_register_local(alpm_handle_t *handle); diff --git a/lib/libalpm/signing.c b/lib/libalpm/signing.c index 7521e3a..cdbdc31 100644 --- a/lib/libalpm/signing.c +++ b/lib/libalpm/signing.c @@ -186,6 +186,28 @@ error: return 1; } + +/** + * Form a signature path given a file path. + * Caller must free the result. + * @param handle the context handle + * @param path the full path to a file + * @return the path with '.sig' appended, NULL on errors + */ +char *_alpm_sigpath(alpm_handle_t *handle, const char *path) +{ + char *sigpath; + size_t len; + + if(!path) { + return NULL; + } + len = strlen(path) + 5; + CALLOC(sigpath, len, sizeof(char), RET_ERR(handle, ALPM_ERR_MEMORY, NULL)); + sprintf(sigpath, "%s.sig", path); + return sigpath; +} + /** * Check the PGP signature for the given file path. * If base64_sig is provided, it will be used as the signature data after @@ -226,13 +248,9 @@ int _alpm_gpgme_checksig(alpm_handle_t *handle, const char *path, result->count = 0; if(!base64_sig) { - size_t len = strlen(path) + 5; - CALLOC(sigpath, len, sizeof(char), RET_ERR(handle, ALPM_ERR_MEMORY, -1)); - snprintf(sigpath, len, "%s.sig", path); - - if(!_alpm_access(handle, NULL, sigpath, R_OK) == 0) { - /* sigcount is 0 */ - } + sigpath = _alpm_sigpath(handle, path); + /* this will just help debugging */ + _alpm_access(handle, NULL, sigpath, R_OK); } if(init_gpgme(handle)) { @@ -274,6 +292,8 @@ int _alpm_gpgme_checksig(alpm_handle_t *handle, const char *path, /* file-based, it is on disk */ sigfile = fopen(sigpath, "rb"); if(sigfile == NULL) { + _alpm_log(handle, ALPM_LOG_DEBUG, "sig path %s could not be opened\n", + sigpath); handle->pm_errno = ALPM_ERR_SIG_MISSING; goto error; } diff --git a/lib/libalpm/signing.h b/lib/libalpm/signing.h index 22f6357..d07057a 100644 --- a/lib/libalpm/signing.h +++ b/lib/libalpm/signing.h @@ -21,6 +21,7 @@ #include "alpm.h" +char *_alpm_sigpath(alpm_handle_t *handle, const char *path); int _alpm_gpgme_checksig(alpm_handle_t *handle, const char *path, const char *base64_sig, alpm_sigresult_t *result); int _alpm_check_pgp_helper(alpm_handle_t *handle, const char *path, -- 1.7.6
