add vendoring

vendor/maunium.net/go/mautrix/crypto/olm/error.go

@@ -0,0 +1,60 @@
+package olm
+
+import (
+	"errors"
+	"fmt"
+)
+
+// Error codes from go-olm
+var (
+	EmptyInput         = errors.New("empty input")
+	NoKeyProvided      = errors.New("no pickle key provided")
+	NotEnoughGoRandom  = errors.New("couldn't get enough randomness from crypto/rand")
+	SignatureNotFound  = errors.New("input JSON doesn't contain signature from specified device")
+	InputNotJSONString = errors.New("input doesn't look like a JSON string")
+)
+
+// Error codes from olm code
+var (
+	NotEnoughRandom        = errors.New("not enough entropy was supplied")
+	OutputBufferTooSmall   = errors.New("supplied output buffer is too small")
+	BadMessageVersion      = errors.New("the message version is unsupported")
+	BadMessageFormat       = errors.New("the message couldn't be decoded")
+	BadMessageMAC          = errors.New("the message couldn't be decrypted")
+	BadMessageKeyID        = errors.New("the message references an unknown key ID")
+	InvalidBase64          = errors.New("the input base64 was invalid")
+	BadAccountKey          = errors.New("the supplied account key is invalid")
+	UnknownPickleVersion   = errors.New("the pickled object is too new")
+	CorruptedPickle        = errors.New("the pickled object couldn't be decoded")
+	BadSessionKey          = errors.New("attempt to initialise an inbound group session from an invalid session key")
+	UnknownMessageIndex    = errors.New("attempt to decode a message whose index is earlier than our earliest known session key")
+	BadLegacyAccountPickle = errors.New("attempt to unpickle an account which uses pickle version 1")
+	BadSignature           = errors.New("received message had a bad signature")
+	InputBufferTooSmall    = errors.New("the input data was too small to be valid")
+)
+
+var errorMap = map[string]error{
+	"NOT_ENOUGH_RANDOM":         NotEnoughRandom,
+	"OUTPUT_BUFFER_TOO_SMALL":   OutputBufferTooSmall,
+	"BAD_MESSAGE_VERSION":       BadMessageVersion,
+	"BAD_MESSAGE_FORMAT":        BadMessageFormat,
+	"BAD_MESSAGE_MAC":           BadMessageMAC,
+	"BAD_MESSAGE_KEY_ID":        BadMessageKeyID,
+	"INVALID_BASE64":            InvalidBase64,
+	"BAD_ACCOUNT_KEY":           BadAccountKey,
+	"UNKNOWN_PICKLE_VERSION":    UnknownPickleVersion,
+	"CORRUPTED_PICKLE":          CorruptedPickle,
+	"BAD_SESSION_KEY":           BadSessionKey,
+	"UNKNOWN_MESSAGE_INDEX":     UnknownMessageIndex,
+	"BAD_LEGACY_ACCOUNT_PICKLE": BadLegacyAccountPickle,
+	"BAD_SIGNATURE":             BadSignature,
+	"INPUT_BUFFER_TOO_SMALL":    InputBufferTooSmall,
+}
+
+func convertError(errCode string) error {
+	err, ok := errorMap[errCode]
+	if ok {
+		return err
+	}
+	return fmt.Errorf("unknown error: %s", errCode)
+}