Merge branch 'mh/credential-erase-improvements-more'

Update two credential helpers to correctly match which credential
to erase; they dropped not the ones with stale password.

* mh/credential-erase-improvements-more:
  credential/wincred: erase matching creds only
  credential/libsecret: erase matching creds only

contrib/credential/libsecret/git-credential-libsecret.c

@@ -54,6 +54,8 @@ struct credential_operation {
 
 #define CREDENTIAL_OP_END { NULL, NULL }
 
+static void credential_clear(struct credential *c);
+
 /* ----------------- Secret Service functions ----------------- */
 
 static const SecretSchema schema = {
@@ -237,6 +239,7 @@ static int keyring_erase(struct credential *c)
 {
 	GHashTable *attributes = NULL;
 	GError *error = NULL;
+	struct credential existing = CREDENTIAL_INIT;
 
 	/*
 	 * Sanity check that we actually have something to match
@@ -249,6 +252,20 @@ static int keyring_erase(struct credential *c)
 	if (!c->protocol && !c->host && !c->path && !c->username)
 		return EXIT_FAILURE;
 
+	if (c->password) {
+		existing.host = g_strdup(c->host);
+		existing.path = g_strdup(c->path);
+		existing.port = c->port;
+		existing.protocol = g_strdup(c->protocol);
+		existing.username = g_strdup(c->username);
+		keyring_get(&existing);
+		if (existing.password && strcmp(c->password, existing.password)) {
+			credential_clear(&existing);
+			return EXIT_SUCCESS;
+		}
+		credential_clear(&existing);
+	}
+
 	attributes = make_attr_list(c);
 	secret_password_clearv_sync(&schema,
 				    attributes,

contrib/credential/wincred/git-credential-wincred.c

@@ -109,7 +109,18 @@ static int match_part_last(LPCWSTR *ptarget, LPCWSTR want, LPCWSTR delim)
 	return match_part_with_last(ptarget, want, delim, 1);
 }
 
-static int match_cred(const CREDENTIALW *cred)
+static int match_cred_password(const CREDENTIALW *cred) {
+	int ret;
+	WCHAR *cred_password = xmalloc(cred->CredentialBlobSize);
+	wcsncpy_s(cred_password, cred->CredentialBlobSize,
+		(LPCWSTR)cred->CredentialBlob,
+		cred->CredentialBlobSize / sizeof(WCHAR));
+	ret = !wcscmp(cred_password, password);
+	free(cred_password);
+	return ret;
+}
+
+static int match_cred(const CREDENTIALW *cred, int match_password)
 {
 	LPCWSTR target = cred->TargetName;
 	if (wusername && wcscmp(wusername, cred->UserName ? cred->UserName : L""))
@@ -119,7 +130,8 @@ static int match_cred(const CREDENTIALW *cred)
 		match_part(&target, protocol, L"://") &&
 		match_part_last(&target, wusername, L"@") &&
 		match_part(&target, host, L"/") &&
-		match_part(&target, path, L"");
+		match_part(&target, path, L"") &&
+		(!match_password || match_cred_password(cred));
 }
 
 static void get_credential(void)
@@ -134,7 +146,7 @@ static void get_credential(void)
 
 	/* search for the first credential that matches username */
 	for (i = 0; i < num_creds; ++i)
-		if (match_cred(creds[i])) {
+		if (match_cred(creds[i], 0)) {
 			write_item("username", creds[i]->UserName,
 				creds[i]->UserName ? wcslen(creds[i]->UserName) : 0);
 			write_item("password",
@@ -196,7 +208,7 @@ static void erase_credential(void)
 		return;
 
 	for (i = 0; i < num_creds; ++i) {
-		if (match_cred(creds[i]))
+		if (match_cred(creds[i], password != NULL))
 			CredDeleteW(creds[i]->TargetName, creds[i]->Type, 0);
 	}