/* common helpers */
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+
static void die(const char *err, ...)
{
char msg[4096];
return ret;
}
-static char *xstrdup(const char *str)
-{
- char *ret = strdup(str);
- if (!ret)
- die("Out of memory");
- return ret;
-}
-
/* MinGW doesn't have wincred.h, so we need to define stuff */
typedef struct _CREDENTIAL_ATTRIBUTEW {
#define CRED_MAX_ATTRIBUTES 64
typedef BOOL (WINAPI *CredWriteWT)(PCREDENTIALW, DWORD);
-typedef BOOL (WINAPI *CredUnPackAuthenticationBufferWT)(DWORD, PVOID, DWORD,
- LPWSTR, DWORD *, LPWSTR, DWORD *, LPWSTR, DWORD *);
typedef BOOL (WINAPI *CredEnumerateWT)(LPCWSTR, DWORD, DWORD *,
PCREDENTIALW **);
-typedef BOOL (WINAPI *CredPackAuthenticationBufferWT)(DWORD, LPWSTR, LPWSTR,
- PBYTE, DWORD *);
typedef VOID (WINAPI *CredFreeT)(PVOID);
typedef BOOL (WINAPI *CredDeleteWT)(LPCWSTR, DWORD, DWORD);
-static HMODULE advapi, credui;
+static HMODULE advapi;
static CredWriteWT CredWriteW;
-static CredUnPackAuthenticationBufferWT CredUnPackAuthenticationBufferW;
static CredEnumerateWT CredEnumerateW;
-static CredPackAuthenticationBufferWT CredPackAuthenticationBufferW;
static CredFreeT CredFree;
static CredDeleteWT CredDeleteW;
{
/* load DLLs */
advapi = LoadLibrary("advapi32.dll");
- credui = LoadLibrary("credui.dll");
- if (!advapi || !credui)
- die("failed to load DLLs");
+ if (!advapi)
+ die("failed to load advapi32.dll");
/* get function pointers */
CredWriteW = (CredWriteWT)GetProcAddress(advapi, "CredWriteW");
- CredUnPackAuthenticationBufferW = (CredUnPackAuthenticationBufferWT)
- GetProcAddress(credui, "CredUnPackAuthenticationBufferW");
CredEnumerateW = (CredEnumerateWT)GetProcAddress(advapi,
"CredEnumerateW");
- CredPackAuthenticationBufferW = (CredPackAuthenticationBufferWT)
- GetProcAddress(credui, "CredPackAuthenticationBufferW");
CredFree = (CredFreeT)GetProcAddress(advapi, "CredFree");
CredDeleteW = (CredDeleteWT)GetProcAddress(advapi, "CredDeleteW");
- if (!CredWriteW || !CredUnPackAuthenticationBufferW ||
- !CredEnumerateW || !CredPackAuthenticationBufferW || !CredFree ||
- !CredDeleteW)
+ if (!CredWriteW || !CredEnumerateW || !CredFree || !CredDeleteW)
die("failed to load functions");
}
-static char target_buf[1024];
-static char *protocol, *host, *path, *username;
-static WCHAR *wusername, *password, *target;
+static WCHAR *wusername, *password, *protocol, *host, *path, target[1024];
-static void write_item(const char *what, WCHAR *wbuf)
+static void write_item(const char *what, LPCWSTR wbuf, int wlen)
{
char *buf;
- int len = WideCharToMultiByte(CP_UTF8, 0, wbuf, -1, NULL, 0, NULL,
+ int len = WideCharToMultiByte(CP_UTF8, 0, wbuf, wlen, NULL, 0, NULL,
FALSE);
buf = xmalloc(len);
- if (!WideCharToMultiByte(CP_UTF8, 0, wbuf, -1, buf, len, NULL, FALSE))
+ if (!WideCharToMultiByte(CP_UTF8, 0, wbuf, wlen, buf, len, NULL, FALSE))
die("WideCharToMultiByte failed!");
printf("%s=", what);
- fwrite(buf, 1, len - 1, stdout);
+ fwrite(buf, 1, len, stdout);
putchar('\n');
free(buf);
}
-static int match_attr(const CREDENTIALW *cred, const WCHAR *keyword,
- const char *want)
+/*
+ * Match an (optional) expected string and a delimiter in the target string,
+ * consuming the matched text by updating the target pointer.
+ */
+static int match_part(LPCWSTR *ptarget, LPCWSTR want, LPCWSTR delim)
{
- int i;
- if (!want)
- return 1;
-
- for (i = 0; i < cred->AttributeCount; ++i)
- if (!wcscmp(cred->Attributes[i].Keyword, keyword))
- return !strcmp((const char *)cred->Attributes[i].Value,
- want);
-
- return 0; /* not found */
+ LPCWSTR delim_pos, start = *ptarget;
+ int len;
+
+ /* find start of delimiter (or end-of-string if delim is empty) */
+ if (*delim)
+ delim_pos = wcsstr(start, delim);
+ else
+ delim_pos = start + wcslen(start);
+
+ /*
+ * match text up to delimiter, or end of string (e.g. the '/' after
+ * host is optional if not followed by a path)
+ */
+ if (delim_pos)
+ len = delim_pos - start;
+ else
+ len = wcslen(start);
+
+ /* update ptarget if we either found a delimiter or need a match */
+ if (delim_pos || want)
+ *ptarget = delim_pos ? delim_pos + wcslen(delim) : start + len;
+
+ return !want || (!wcsncmp(want, start, len) && !want[len]);
}
static int match_cred(const CREDENTIALW *cred)
{
- return (!wusername || !wcscmp(wusername, cred->UserName)) &&
- match_attr(cred, L"git_protocol", protocol) &&
- match_attr(cred, L"git_host", host) &&
- match_attr(cred, L"git_path", path);
+ LPCWSTR target = cred->TargetName;
+ if (wusername && wcscmp(wusername, cred->UserName))
+ return 0;
+
+ return match_part(&target, L"git", L":") &&
+ match_part(&target, protocol, L"://") &&
+ match_part(&target, wusername, L"@") &&
+ match_part(&target, host, L"/") &&
+ match_part(&target, path, L"");
}
static void get_credential(void)
{
- WCHAR *user_buf, *pass_buf;
- DWORD user_buf_size = 0, pass_buf_size = 0;
- CREDENTIALW **creds, *cred = NULL;
+ CREDENTIALW **creds;
DWORD num_creds;
int i;
/* search for the first credential that matches username */
for (i = 0; i < num_creds; ++i)
if (match_cred(creds[i])) {
- cred = creds[i];
+ write_item("username", creds[i]->UserName,
+ wcslen(creds[i]->UserName));
+ write_item("password",
+ (LPCWSTR)creds[i]->CredentialBlob,
+ creds[i]->CredentialBlobSize / sizeof(WCHAR));
break;
}
- if (!cred)
- return;
-
- CredUnPackAuthenticationBufferW(0, cred->CredentialBlob,
- cred->CredentialBlobSize, NULL, &user_buf_size, NULL, NULL,
- NULL, &pass_buf_size);
-
- user_buf = xmalloc(user_buf_size * sizeof(WCHAR));
- pass_buf = xmalloc(pass_buf_size * sizeof(WCHAR));
-
- if (!CredUnPackAuthenticationBufferW(0, cred->CredentialBlob,
- cred->CredentialBlobSize, user_buf, &user_buf_size, NULL, NULL,
- pass_buf, &pass_buf_size))
- die("CredUnPackAuthenticationBuffer failed");
CredFree(creds);
-
- /* zero-terminate (sizes include zero-termination) */
- user_buf[user_buf_size - 1] = L'\0';
- pass_buf[pass_buf_size - 1] = L'\0';
-
- write_item("username", user_buf);
- write_item("password", pass_buf);
-
- free(user_buf);
- free(pass_buf);
-}
-
-static void write_attr(CREDENTIAL_ATTRIBUTEW *attr, const WCHAR *keyword,
- const char *value)
-{
- attr->Keyword = (LPWSTR)keyword;
- attr->Flags = 0;
- attr->ValueSize = strlen(value) + 1; /* store zero-termination */
- attr->Value = (LPBYTE)value;
}
static void store_credential(void)
{
CREDENTIALW cred;
- BYTE *auth_buf;
- DWORD auth_buf_size = 0;
- CREDENTIAL_ATTRIBUTEW attrs[CRED_MAX_ATTRIBUTES];
if (!wusername || !password)
return;
- /* query buffer size */
- CredPackAuthenticationBufferW(0, wusername, password,
- NULL, &auth_buf_size);
-
- auth_buf = xmalloc(auth_buf_size);
-
- if (!CredPackAuthenticationBufferW(0, wusername, password,
- auth_buf, &auth_buf_size))
- die("CredPackAuthenticationBuffer failed");
-
cred.Flags = 0;
cred.Type = CRED_TYPE_GENERIC;
cred.TargetName = target;
cred.Comment = L"saved by git-credential-wincred";
- cred.CredentialBlobSize = auth_buf_size;
- cred.CredentialBlob = auth_buf;
+ cred.CredentialBlobSize = (wcslen(password)) * sizeof(WCHAR);
+ cred.CredentialBlob = (LPVOID)password;
cred.Persist = CRED_PERSIST_LOCAL_MACHINE;
- cred.AttributeCount = 1;
- cred.Attributes = attrs;
+ cred.AttributeCount = 0;
+ cred.Attributes = NULL;
cred.TargetAlias = NULL;
cred.UserName = wusername;
- write_attr(attrs, L"git_protocol", protocol);
-
- if (host) {
- write_attr(attrs + cred.AttributeCount, L"git_host", host);
- cred.AttributeCount++;
- }
-
- if (path) {
- write_attr(attrs + cred.AttributeCount, L"git_path", path);
- cred.AttributeCount++;
- }
-
if (!CredWriteW(&cred, 0))
die("CredWrite failed");
}
while (fgets(buf, sizeof(buf), stdin)) {
char *v;
+ int len = strlen(buf);
+ /* strip trailing CR / LF */
+ while (len && strchr("\r\n", buf[len - 1]))
+ buf[--len] = 0;
- if (!strcmp(buf, "\n"))
+ if (!*buf)
break;
- buf[strlen(buf)-1] = '\0';
v = strchr(buf, '=');
if (!v)
*v++ = '\0';
if (!strcmp(buf, "protocol"))
- protocol = xstrdup(v);
+ protocol = utf8_to_utf16_dup(v);
else if (!strcmp(buf, "host"))
- host = xstrdup(v);
+ host = utf8_to_utf16_dup(v);
else if (!strcmp(buf, "path"))
- path = xstrdup(v);
+ path = utf8_to_utf16_dup(v);
else if (!strcmp(buf, "username")) {
- username = xstrdup(v);
wusername = utf8_to_utf16_dup(v);
} else if (!strcmp(buf, "password"))
password = utf8_to_utf16_dup(v);
int main(int argc, char *argv[])
{
const char *usage =
- "Usage: git credential-wincred <get|store|erase>\n";
+ "usage: git credential-wincred <get|store|erase>\n";
if (!argv[1])
die(usage);
return 0;
/* prepare 'target', the unique key for the credential */
- strncat(target_buf, "git:", sizeof(target_buf));
- strncat(target_buf, protocol, sizeof(target_buf));
- strncat(target_buf, "://", sizeof(target_buf));
- if (username) {
- strncat(target_buf, username, sizeof(target_buf));
- strncat(target_buf, "@", sizeof(target_buf));
+ wcscpy(target, L"git:");
+ wcsncat(target, protocol, ARRAY_SIZE(target));
+ wcsncat(target, L"://", ARRAY_SIZE(target));
+ if (wusername) {
+ wcsncat(target, wusername, ARRAY_SIZE(target));
+ wcsncat(target, L"@", ARRAY_SIZE(target));
}
if (host)
- strncat(target_buf, host, sizeof(target_buf));
+ wcsncat(target, host, ARRAY_SIZE(target));
if (path) {
- strncat(target_buf, "/", sizeof(target_buf));
- strncat(target_buf, path, sizeof(target_buf));
+ wcsncat(target, L"/", ARRAY_SIZE(target));
+ wcsncat(target, path, ARRAY_SIZE(target));
}
- target = utf8_to_utf16_dup(target_buf);
-
if (!strcmp(argv[1], "get"))
get_credential();
else if (!strcmp(argv[1], "store"))