go/msteinert-go-pam
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transaction: Add PAM Error types Go definitions

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And use them instead of C ones. Given that we have strings for them we
can easily implement error interfaces for it too.
This commit is contained in:
Marco Trevisan (Treviño)
2023-09-22 16:59:03 +02:00
parent 44c364e364
commit 6bb315c571
2 changed files with 115 additions and 18 deletions
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39
transaction.go
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@@ -29,6 +29,9 @@ import (
"unsafe"
)
// success indicates a successful function return.
const success = C.PAM_SUCCESS
// Style is the type of message that the conversation handler should display.
type Style int
@@ -100,25 +103,25 @@ func cbPAMConv(s C.int, msg *C.char, c C.uintptr_t) (*C.char, C.int) {
if style == BinaryPrompt {
bytes, err := cb.RespondPAMBinary(BinaryPointer(msg))
if err != nil {
return nil, C.PAM_CONV_ERR
return nil, C.int(ErrConv)
}
return (*C.char)(C.CBytes(bytes)), C.PAM_SUCCESS
return (*C.char)(C.CBytes(bytes)), success
}
handler = cb
case ConversationHandler:
if style == BinaryPrompt {
return nil, C.PAM_AUTHINFO_UNAVAIL
return nil, C.int(ErrConv)
}
handler = cb
}
if handler == nil {
return nil, C.PAM_CONV_ERR
return nil, C.int(ErrConv)
}
r, err = handler.RespondPAM(style, C.GoString(msg))
if err != nil {
return nil, C.PAM_CONV_ERR
return nil, C.int(ErrConv)
}
return C.CString(r), C.PAM_SUCCESS
return C.CString(r), success
}
// Transaction is the application's handle for a PAM transaction.
@@ -194,14 +197,14 @@ func start(service, user string, handler ConversationHandler, confDir string) (*
defer C.free(unsafe.Pointer(c))
t.status = C.pam_start_confdir(s, u, t.conv, c, &t.handle)
}
if t.status != C.PAM_SUCCESS {
if t.status != success {
return nil, t
}
return t, nil
}
func (t *Transaction) Error() string {
return C.GoString(C.pam_strerror(t.handle, t.status))
return Error(t.status).Error()
}
// Item is a an PAM information type.
@@ -232,7 +235,7 @@ func (t *Transaction) SetItem(i Item, item string) error {
cs := unsafe.Pointer(C.CString(item))
defer C.free(cs)
t.status = C.pam_set_item(t.handle, C.int(i), cs)
if t.status != C.PAM_SUCCESS {
if t.status != success {
return t
}
return nil
@@ -242,7 +245,7 @@ func (t *Transaction) SetItem(i Item, item string) error {
func (t *Transaction) GetItem(i Item) (string, error) {
var s unsafe.Pointer
t.status = C.pam_get_item(t.handle, C.int(i), &s)
if t.status != C.PAM_SUCCESS {
if t.status != success {
return "", t
}
return C.GoString((*C.char)(s)), nil
@@ -281,7 +284,7 @@ const (
// Valid flags: Silent, DisallowNullAuthtok
func (t *Transaction) Authenticate(f Flags) error {
t.status = C.pam_authenticate(t.handle, C.int(f))
if t.status != C.PAM_SUCCESS {
if t.status != success {
return t
}
return nil
@@ -293,7 +296,7 @@ func (t *Transaction) Authenticate(f Flags) error {
// Valid flags: EstablishCred, DeleteCred, ReinitializeCred, RefreshCred
func (t *Transaction) SetCred(f Flags) error {
t.status = C.pam_setcred(t.handle, C.int(f))
if t.status != C.PAM_SUCCESS {
if t.status != success {
return t
}
return nil
@@ -304,7 +307,7 @@ func (t *Transaction) SetCred(f Flags) error {
// Valid flags: Silent, DisallowNullAuthtok
func (t *Transaction) AcctMgmt(f Flags) error {
t.status = C.pam_acct_mgmt(t.handle, C.int(f))
if t.status != C.PAM_SUCCESS {
if t.status != success {
return t
}
return nil
@@ -315,7 +318,7 @@ func (t *Transaction) AcctMgmt(f Flags) error {
// Valid flags: Silent, ChangeExpiredAuthtok
func (t *Transaction) ChangeAuthTok(f Flags) error {
t.status = C.pam_chauthtok(t.handle, C.int(f))
if t.status != C.PAM_SUCCESS {
if t.status != success {
return t
}
return nil
@@ -326,7 +329,7 @@ func (t *Transaction) ChangeAuthTok(f Flags) error {
// Valid flags: Slient
func (t *Transaction) OpenSession(f Flags) error {
t.status = C.pam_open_session(t.handle, C.int(f))
if t.status != C.PAM_SUCCESS {
if t.status != success {
return t
}
return nil
@@ -337,7 +340,7 @@ func (t *Transaction) OpenSession(f Flags) error {
// Valid flags: Silent
func (t *Transaction) CloseSession(f Flags) error {
t.status = C.pam_close_session(t.handle, C.int(f))
if t.status != C.PAM_SUCCESS {
if t.status != success {
return t
}
return nil
@@ -352,7 +355,7 @@ func (t *Transaction) PutEnv(nameval string) error {
cs := C.CString(nameval)
defer C.free(unsafe.Pointer(cs))
t.status = C.pam_putenv(t.handle, cs)
if t.status != C.PAM_SUCCESS {
if t.status != success {
return t
}
return nil
@@ -378,7 +381,7 @@ func (t *Transaction) GetEnvList() (map[string]string, error) {
env := make(map[string]string)
p := C.pam_getenvlist(t.handle)
if p == nil {
t.status = C.PAM_BUF_ERR
t.status = C.int(ErrBuf)
return nil, t
}
for q := p; *q != nil; q = next(q) {