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signing: be consistent with returning -1 for error cases

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This also fixes a segfault found by dave when key_search is
unsuccessful; the key_search return code documentation has also been
updated to reflect reality.

Signed-off-by: Dan McGee <dan@archlinux.org>
This commit is contained in:
Dan McGee 2011-09-22 14:40:51 -05:00
parent f1beb050a3
commit 907e8af5be
1 changed files with 17 additions and 12 deletions
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29
lib/libalpm/signing.c
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@ -120,7 +120,7 @@ static alpm_list_t *list_sigsum(gpgme_sigsum_t sigsum)
* Initialize the GPGME library.
* This can be safely called multiple times; however it is not thread-safe.
* @param handle the context handle
* @return 0 on success, 1 on error
* @return 0 on success, -1 on error
*/
static int init_gpgme(alpm_handle_t *handle)
{
@ -175,7 +175,7 @@ static int init_gpgme(alpm_handle_t *handle)
error:
_alpm_log(handle, ALPM_LOG_ERROR, _("GPGME error: %s\n"), gpgme_strerror(err));
RET_ERR(handle, ALPM_ERR_GPGME, 1);
RET_ERR(handle, ALPM_ERR_GPGME, -1);
}
/**
@ -221,7 +221,7 @@ error:
* @param handle the context handle
* @param fpr the fingerprint key ID to look up
* @param pgpkey storage location for the given key if found
* @return 0 on success, 1 on error or key not found
* @return 1 on success, 0 on key not found, -1 on error
*/
static int key_search(alpm_handle_t *handle, const char *fpr,
alpm_pgpkey_t *pgpkey)
@ -230,6 +230,7 @@ static int key_search(alpm_handle_t *handle, const char *fpr,
gpgme_ctx_t ctx;
gpgme_keylist_mode_t mode;
gpgme_key_t key;
int ret = -1;
memset(&ctx, 0, sizeof(ctx));
err = gpgme_new(&ctx);
@ -247,10 +248,11 @@ static int key_search(alpm_handle_t *handle, const char *fpr,
err = gpgme_get_key(ctx, fpr, &key, 0);
if(gpg_err_code(err) == GPG_ERR_EOF) {
_alpm_log(handle, ALPM_LOG_DEBUG, "key lookup failed, unknown key\n");
ret = 0;
goto error;
} else if(gpg_err_code(err) != GPG_ERR_NO_ERROR) {
_alpm_log(handle, ALPM_LOG_DEBUG,
"gpg error: %s\n", gpgme_strerror(err));
CHECK_ERR();
_alpm_log(handle, ALPM_LOG_DEBUG, "gpg error: %s\n", gpgme_strerror(err));
goto error;
}
/* should only get here if key actually exists */
@ -265,23 +267,25 @@ static int key_search(alpm_handle_t *handle, const char *fpr,
pgpkey->email = key->uids->email;
pgpkey->created = key->subkeys->timestamp;
pgpkey->expires = key->subkeys->expires;
ret = 1;
error:
gpgme_release(ctx);
return gpg_err_code(err) == GPG_ERR_NO_ERROR;
return ret;
}
/**
* Import a key into the local keyring.
* @param handle the context handle
* @param key the key to import, likely retrieved from #key_search
* @return 0 on success, 1 on error
* @return 0 on success, -1 on error
*/
static int key_import(alpm_handle_t *handle, alpm_pgpkey_t *key)
{
gpgme_error_t err;
gpgme_ctx_t ctx;
gpgme_key_t keys[2];
int ret = -1;
memset(&ctx, 0, sizeof(ctx));
err = gpgme_new(&ctx);
@ -293,10 +297,11 @@ static int key_import(alpm_handle_t *handle, alpm_pgpkey_t *key)
keys[1] = NULL;
err = gpgme_op_import_keys(ctx, keys);
CHECK_ERR();
ret = 0;
error:
gpgme_release(ctx);
return gpg_err_code(err) != GPG_ERR_NO_ERROR;
return ret;
}
/**
@ -304,7 +309,7 @@ error:
* @param base64_data the signature to attempt to decode
* @param data the decoded data; must be freed by the caller
* @param data_len the length of the returned data
* @return 0 on success, 1 on failure to properly decode
* @return 0 on success, -1 on failure to properly decode
*/
static int decode_signature(const char *base64_data,
unsigned char **data, size_t *data_len) {
@ -323,7 +328,7 @@ static int decode_signature(const char *base64_data,
error:
*data = NULL;
*data_len = 0;
return 1;
return -1;
}
/**
@ -737,7 +742,7 @@ int _alpm_process_siglist(alpm_handle_t *handle, const char *identifier,
alpm_pgpkey_t fetch_key;
memset(&fetch_key, 0, sizeof(fetch_key));
if(key_search(handle, result->key.fingerprint, &fetch_key)) {
if(key_search(handle, result->key.fingerprint, &fetch_key) == 1) {
_alpm_log(handle, ALPM_LOG_DEBUG,
"unknown key, found %s on keyserver\n", fetch_key.uid);
QUESTION(handle, ALPM_QUESTION_IMPORT_KEY,