diff options
Diffstat (limited to 'third_party/git/contrib/credential/wincred/git-credential-wincred.c')
| -rw-r--r-- | third_party/git/contrib/credential/wincred/git-credential-wincred.c | 327 |
1 files changed, 0 insertions, 327 deletions
diff --git a/third_party/git/contrib/credential/wincred/git-credential-wincred.c b/third_party/git/contrib/credential/wincred/git-credential-wincred.c deleted file mode 100644 index 5bdad41de1..0000000000 --- a/third_party/git/contrib/credential/wincred/git-credential-wincred.c +++ /dev/null @@ -1,327 +0,0 @@ -/* - * A git credential helper that interface with Windows' Credential Manager - * - */ -#include <windows.h> -#include <stdio.h> -#include <io.h> -#include <fcntl.h> - -/* common helpers */ - -#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) - -static void die(const char *err, ...) -{ - char msg[4096]; - va_list params; - va_start(params, err); - vsnprintf(msg, sizeof(msg), err, params); - fprintf(stderr, "%s\n", msg); - va_end(params); - exit(1); -} - -static void *xmalloc(size_t size) -{ - void *ret = malloc(size); - if (!ret && !size) - ret = malloc(1); - if (!ret) - die("Out of memory"); - return ret; -} - -/* MinGW doesn't have wincred.h, so we need to define stuff */ - -typedef struct _CREDENTIAL_ATTRIBUTEW { - LPWSTR Keyword; - DWORD Flags; - DWORD ValueSize; - LPBYTE Value; -} CREDENTIAL_ATTRIBUTEW, *PCREDENTIAL_ATTRIBUTEW; - -typedef struct _CREDENTIALW { - DWORD Flags; - DWORD Type; - LPWSTR TargetName; - LPWSTR Comment; - FILETIME LastWritten; - DWORD CredentialBlobSize; - LPBYTE CredentialBlob; - DWORD Persist; - DWORD AttributeCount; - PCREDENTIAL_ATTRIBUTEW Attributes; - LPWSTR TargetAlias; - LPWSTR UserName; -} CREDENTIALW, *PCREDENTIALW; - -#define CRED_TYPE_GENERIC 1 -#define CRED_PERSIST_LOCAL_MACHINE 2 -#define CRED_MAX_ATTRIBUTES 64 - -typedef BOOL (WINAPI *CredWriteWT)(PCREDENTIALW, DWORD); -typedef BOOL (WINAPI *CredEnumerateWT)(LPCWSTR, DWORD, DWORD *, - PCREDENTIALW **); -typedef VOID (WINAPI *CredFreeT)(PVOID); -typedef BOOL (WINAPI *CredDeleteWT)(LPCWSTR, DWORD, DWORD); - -static HMODULE advapi; -static CredWriteWT CredWriteW; -static CredEnumerateWT CredEnumerateW; -static CredFreeT CredFree; -static CredDeleteWT CredDeleteW; - -static void load_cred_funcs(void) -{ - /* load DLLs */ - advapi = LoadLibraryExA("advapi32.dll", NULL, - LOAD_LIBRARY_SEARCH_SYSTEM32); - if (!advapi) - die("failed to load advapi32.dll"); - - /* get function pointers */ - CredWriteW = (CredWriteWT)GetProcAddress(advapi, "CredWriteW"); - CredEnumerateW = (CredEnumerateWT)GetProcAddress(advapi, - "CredEnumerateW"); - CredFree = (CredFreeT)GetProcAddress(advapi, "CredFree"); - CredDeleteW = (CredDeleteWT)GetProcAddress(advapi, "CredDeleteW"); - if (!CredWriteW || !CredEnumerateW || !CredFree || !CredDeleteW) - die("failed to load functions"); -} - -static WCHAR *wusername, *password, *protocol, *host, *path, target[1024]; - -static void write_item(const char *what, LPCWSTR wbuf, int wlen) -{ - char *buf; - - if (!wbuf || !wlen) { - printf("%s=\n", what); - return; - } - - int len = WideCharToMultiByte(CP_UTF8, 0, wbuf, wlen, NULL, 0, NULL, - FALSE); - buf = xmalloc(len); - - if (!WideCharToMultiByte(CP_UTF8, 0, wbuf, wlen, buf, len, NULL, FALSE)) - die("WideCharToMultiByte failed!"); - - printf("%s=", what); - fwrite(buf, 1, len, stdout); - putchar('\n'); - free(buf); -} - -/* - * Match an (optional) expected string and a delimiter in the target string, - * consuming the matched text by updating the target pointer. - */ - -static LPCWSTR wcsstr_last(LPCWSTR str, LPCWSTR find) -{ - LPCWSTR res = NULL, pos; - for (pos = wcsstr(str, find); pos; pos = wcsstr(pos + 1, find)) - res = pos; - return res; -} - -static int match_part_with_last(LPCWSTR *ptarget, LPCWSTR want, LPCWSTR delim, int last) -{ - LPCWSTR delim_pos, start = *ptarget; - int len; - - /* find start of delimiter (or end-of-string if delim is empty) */ - if (*delim) - delim_pos = last ? wcsstr_last(start, delim) : 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_part(LPCWSTR *ptarget, LPCWSTR want, LPCWSTR delim) -{ - return match_part_with_last(ptarget, want, delim, 0); -} - -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) -{ - LPCWSTR target = cred->TargetName; - if (wusername && wcscmp(wusername, cred->UserName ? cred->UserName : L"")) - return 0; - - return match_part(&target, L"git", L":") && - match_part(&target, protocol, L"://") && - match_part_last(&target, wusername, L"@") && - match_part(&target, host, L"/") && - match_part(&target, path, L""); -} - -static void get_credential(void) -{ - CREDENTIALW **creds; - DWORD num_creds; - int i; - - if (!CredEnumerateW(L"git:*", 0, &num_creds, &creds)) - return; - - /* search for the first credential that matches username */ - for (i = 0; i < num_creds; ++i) - if (match_cred(creds[i])) { - 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)); - break; - } - - CredFree(creds); -} - -static void store_credential(void) -{ - CREDENTIALW cred; - - if (!wusername || !password) - return; - - 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.Persist = CRED_PERSIST_LOCAL_MACHINE; - cred.AttributeCount = 0; - cred.Attributes = NULL; - cred.TargetAlias = NULL; - cred.UserName = wusername; - - if (!CredWriteW(&cred, 0)) - die("CredWrite failed"); -} - -static void erase_credential(void) -{ - CREDENTIALW **creds; - DWORD num_creds; - int i; - - if (!CredEnumerateW(L"git:*", 0, &num_creds, &creds)) - return; - - for (i = 0; i < num_creds; ++i) { - if (match_cred(creds[i])) - CredDeleteW(creds[i]->TargetName, creds[i]->Type, 0); - } - - CredFree(creds); -} - -static WCHAR *utf8_to_utf16_dup(const char *str) -{ - int wlen = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0); - WCHAR *wstr = xmalloc(sizeof(WCHAR) * wlen); - MultiByteToWideChar(CP_UTF8, 0, str, -1, wstr, wlen); - return wstr; -} - -static void read_credential(void) -{ - char buf[1024]; - - 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 (!*buf) - break; - - v = strchr(buf, '='); - if (!v) - die("bad input: %s", buf); - *v++ = '\0'; - - if (!strcmp(buf, "protocol")) - protocol = utf8_to_utf16_dup(v); - else if (!strcmp(buf, "host")) - host = utf8_to_utf16_dup(v); - else if (!strcmp(buf, "path")) - path = utf8_to_utf16_dup(v); - else if (!strcmp(buf, "username")) { - wusername = utf8_to_utf16_dup(v); - } else if (!strcmp(buf, "password")) - password = utf8_to_utf16_dup(v); - else - die("unrecognized input"); - } -} - -int main(int argc, char *argv[]) -{ - const char *usage = - "usage: git credential-wincred <get|store|erase>\n"; - - if (!argv[1]) - die(usage); - - /* git use binary pipes to avoid CRLF-issues */ - _setmode(_fileno(stdin), _O_BINARY); - _setmode(_fileno(stdout), _O_BINARY); - - read_credential(); - - load_cred_funcs(); - - if (!protocol || !(host || path)) - return 0; - - /* prepare 'target', the unique key for the credential */ - 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) - wcsncat(target, host, ARRAY_SIZE(target)); - if (path) { - wcsncat(target, L"/", ARRAY_SIZE(target)); - wcsncat(target, path, ARRAY_SIZE(target)); - } - - if (!strcmp(argv[1], "get")) - get_credential(); - else if (!strcmp(argv[1], "store")) - store_credential(); - else if (!strcmp(argv[1], "erase")) - erase_credential(); - /* otherwise, ignore unknown action */ - return 0; -} |