From: M Hickford <mirth.hickford@xxxxxxxxx>
a5c7656 (credential: new attribute oauth_refresh_token) introduced
a new confidential credential attribute for helpers to store.
We encode the new attribute in the CredentialBlob, separated by
newline:
hunter2
oauth_refresh_token=xyzzy
This is extensible and backwards compatible. The credential protocol
already assumes that attribute values do not contain newlines.
This fixes test "helper (wincred) gets oauth_refresh_token" when
t0303-credential-external.sh is run with
GIT_TEST_CREDENTIAL_HELPER=wincred. This test was added in a5c76569e7
(credential: new attribute oauth_refresh_token, 2023-04-21).
Alternatives considered: store oauth_refresh_token in a wincred
attribute. This would be insecure because wincred assumes attribute
values to be non-confidential.
Signed-off-by: M Hickford <mirth.hickford@xxxxxxxxx>
---
credential/wincred: store oauth_refresh_token
Patch v2 fixes a bug when password is empty.
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1534%2Fhickford%2Fwincred-refresh-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1534/hickford/wincred-refresh-v2
Pull-Request: https://github.com/gitgitgadget/git/pull/1534
Range-diff vs v1:
1: 46ce22aa3a3 ! 1: 12f092f45b1 credential/wincred: store oauth_refresh_token
@@ Commit message
This is extensible and backwards compatible. The credential protocol
already assumes that attribute values do not contain newlines.
+ This fixes test "helper (wincred) gets oauth_refresh_token" when
+ t0303-credential-external.sh is run with
+ GIT_TEST_CREDENTIAL_HELPER=wincred. This test was added in a5c76569e7
+ (credential: new attribute oauth_refresh_token, 2023-04-21).
+
Alternatives considered: store oauth_refresh_token in a wincred
attribute. This would be insecure because wincred assumes attribute
values to be non-confidential.
@@ contrib/credential/wincred/git-credential-wincred.c: static void get_credential(
if (!CredEnumerateW(L"git:*", 0, &num_creds, &creds))
return;
@@ contrib/credential/wincred/git-credential-wincred.c: static void get_credential(void)
- 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",
- (LPCWSTR)creds[i]->CredentialBlob,
- creds[i]->CredentialBlobSize / sizeof(WCHAR));
-+ secret = xmalloc(creds[i]->CredentialBlobSize);
-+ wcsncpy_s(secret, creds[i]->CredentialBlobSize, (LPCWSTR)creds[i]->CredentialBlob, creds[i]->CredentialBlobSize / sizeof(WCHAR));
-+ line = wcstok_s(secret, L"\r\n", &remaining_lines);
-+ write_item("password", line, wcslen(line));
-+ while(line != NULL) {
-+ part = wcstok_s(line, L"=", &remaining_parts);
-+ if (!wcscmp(part, L"oauth_refresh_token")) {
-+ write_item("oauth_refresh_token", remaining_parts, wcslen(remaining_parts));
++ if (creds[i]->CredentialBlobSize > 0) {
++ secret = xmalloc(creds[i]->CredentialBlobSize);
++ wcsncpy_s(secret, creds[i]->CredentialBlobSize, (LPCWSTR)creds[i]->CredentialBlob, creds[i]->CredentialBlobSize / sizeof(WCHAR));
++ line = wcstok_s(secret, L"\r\n", &remaining_lines);
++ write_item("password", line, line ? wcslen(line) : 0);
++ while(line != NULL) {
++ part = wcstok_s(line, L"=", &remaining_parts);
++ if (!wcscmp(part, L"oauth_refresh_token")) {
++ write_item("oauth_refresh_token", remaining_parts, remaining_parts ? wcslen(remaining_parts) : 0);
++ }
++ line = wcstok_s(NULL, L"\r\n", &remaining_lines);
+ }
-+ line = wcstok_s(NULL, L"\r\n", &remaining_lines);
++ } else {
++ write_item("password",
++ (LPCWSTR)creds[i]->CredentialBlob,
++ creds[i]->CredentialBlobSize / sizeof(WCHAR));
+ }
for (int j = 0; j < creds[i]->AttributeCount; j++) {
attr = creds[i]->Attributes + j;
@@ contrib/credential/wincred/git-credential-wincred.c: static void read_credential
/*
* Ignore other lines; we don't know what they mean, but
* this future-proofs us when later versions of git do
-
- ## t/t0303-credential-external.sh ##
-@@ t/t0303-credential-external.sh: test -z "$GIT_TEST_CREDENTIAL_HELPER_SETUP" ||
- helper_test_clean "$GIT_TEST_CREDENTIAL_HELPER"
-
- helper_test "$GIT_TEST_CREDENTIAL_HELPER"
-+helper_test_oauth_refresh_token "$GIT_TEST_CREDENTIAL_HELPER"
-
- if test -z "$GIT_TEST_CREDENTIAL_HELPER_TIMEOUT"; then
- say "# skipping timeout tests (GIT_TEST_CREDENTIAL_HELPER_TIMEOUT not set)"
.../wincred/git-credential-wincred.c | 46 ++++++++++++++++---
1 file changed, 40 insertions(+), 6 deletions(-)
diff --git a/contrib/credential/wincred/git-credential-wincred.c b/contrib/credential/wincred/git-credential-wincred.c
index 4cd56c42e24..5c6a7d65d4a 100644
--- a/contrib/credential/wincred/git-credential-wincred.c
+++ b/contrib/credential/wincred/git-credential-wincred.c
@@ -35,7 +35,7 @@ static void *xmalloc(size_t size)
}
static WCHAR *wusername, *password, *protocol, *host, *path, target[1024],
- *password_expiry_utc;
+ *password_expiry_utc, *oauth_refresh_token;
static void write_item(const char *what, LPCWSTR wbuf, int wlen)
{
@@ -140,6 +140,11 @@ static void get_credential(void)
DWORD num_creds;
int i;
CREDENTIAL_ATTRIBUTEW *attr;
+ WCHAR *secret;
+ WCHAR *line;
+ WCHAR *remaining_lines;
+ WCHAR *part;
+ WCHAR *remaining_parts;
if (!CredEnumerateW(L"git:*", 0, &num_creds, &creds))
return;
@@ -149,9 +154,23 @@ static void get_credential(void)
if (match_cred(creds[i], 0)) {
write_item("username", creds[i]->UserName,
creds[i]->UserName ? wcslen(creds[i]->UserName) : 0);
- write_item("password",
- (LPCWSTR)creds[i]->CredentialBlob,
- creds[i]->CredentialBlobSize / sizeof(WCHAR));
+ if (creds[i]->CredentialBlobSize > 0) {
+ secret = xmalloc(creds[i]->CredentialBlobSize);
+ wcsncpy_s(secret, creds[i]->CredentialBlobSize, (LPCWSTR)creds[i]->CredentialBlob, creds[i]->CredentialBlobSize / sizeof(WCHAR));
+ line = wcstok_s(secret, L"\r\n", &remaining_lines);
+ write_item("password", line, line ? wcslen(line) : 0);
+ while(line != NULL) {
+ part = wcstok_s(line, L"=", &remaining_parts);
+ if (!wcscmp(part, L"oauth_refresh_token")) {
+ write_item("oauth_refresh_token", remaining_parts, remaining_parts ? wcslen(remaining_parts) : 0);
+ }
+ line = wcstok_s(NULL, L"\r\n", &remaining_lines);
+ }
+ } else {
+ write_item("password",
+ (LPCWSTR)creds[i]->CredentialBlob,
+ creds[i]->CredentialBlobSize / sizeof(WCHAR));
+ }
for (int j = 0; j < creds[i]->AttributeCount; j++) {
attr = creds[i]->Attributes + j;
if (!wcscmp(attr->Keyword, L"git_password_expiry_utc")) {
@@ -160,6 +179,7 @@ static void get_credential(void)
break;
}
}
+ free(secret);
break;
}
@@ -170,16 +190,26 @@ static void store_credential(void)
{
CREDENTIALW cred;
CREDENTIAL_ATTRIBUTEW expiry_attr;
+ WCHAR *secret;
+ int wlen;
if (!wusername || !password)
return;
+ if (oauth_refresh_token) {
+ wlen = _scwprintf(L"%s\r\noauth_refresh_token=%s", password, oauth_refresh_token);
+ secret = xmalloc(sizeof(WCHAR) * wlen);
+ _snwprintf_s(secret, sizeof(WCHAR) * wlen, wlen, L"%s\r\noauth_refresh_token=%s", password, oauth_refresh_token);
+ } else {
+ secret = _wcsdup(password);
+ }
+
cred.Flags = 0;
cred.Type = CRED_TYPE_GENERIC;
cred.TargetName = target;
cred.Comment = L"saved by git-credential-wincred";
- cred.CredentialBlobSize = (wcslen(password)) * sizeof(WCHAR);
- cred.CredentialBlob = (LPVOID)password;
+ cred.CredentialBlobSize = wcslen(secret) * sizeof(WCHAR);
+ cred.CredentialBlob = (LPVOID)_wcsdup(secret);
cred.Persist = CRED_PERSIST_LOCAL_MACHINE;
cred.AttributeCount = 0;
cred.Attributes = NULL;
@@ -194,6 +224,8 @@ static void store_credential(void)
cred.TargetAlias = NULL;
cred.UserName = wusername;
+ free(secret);
+
if (!CredWriteW(&cred, 0))
die("CredWrite failed");
}
@@ -265,6 +297,8 @@ static void read_credential(void)
password = utf8_to_utf16_dup(v);
else if (!strcmp(buf, "password_expiry_utc"))
password_expiry_utc = utf8_to_utf16_dup(v);
+ else if (!strcmp(buf, "oauth_refresh_token"))
+ oauth_refresh_token = utf8_to_utf16_dup(v);
/*
* Ignore other lines; we don't know what they mean, but
* this future-proofs us when later versions of git do
base-commit: bc5204569f7db44d22477485afd52ea410d83743
--
gitgitgadget
