feat(legacy): Implement pagination in SignMessage and VerifyMessage.

legacy/firmware/.changelog.d/1586.added.2

@@ -0,0 +1 @@
+Implement pagination in SignMessage and VerifyMessage.

legacy/firmware/fsm.c

@@ -304,6 +304,49 @@ static bool fsm_layoutAddress(const char *address, const char *desc,
   }
 }
 
+static bool fsm_layoutPaginated(const char *description, const uint8_t *msg,
+                                uint32_t len, bool is_ascii) {
+  const char **str = NULL;
+  const uint32_t row_len = is_ascii ? 13 : 8;
+  do {
+    const uint32_t show_len = MIN(len, row_len * 4);
+    if (is_ascii) {
+      str = split_message(msg, show_len, row_len);
+    } else {
+      str = split_message_hex(msg, show_len);
+    }
+
+    msg += show_len;
+    len -= show_len;
+
+    const char *label = len > 0 ? _("Next") : _("Confirm");
+    layoutDialogSwipe(&bmp_icon_question, _("Cancel"), label, description,
+                      str[0], str[1], str[2], str[3], NULL, NULL);
+
+    if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
+      return false;
+    }
+  } while (len > 0);
+
+  return true;
+}
+
+bool fsm_layoutSignMessage(const uint8_t *msg, uint32_t len) {
+  if (is_valid_ascii(msg, len)) {
+    return fsm_layoutPaginated(_("Sign message?"), msg, len, true);
+  } else {
+    return fsm_layoutPaginated(_("Sign binary message?"), msg, len, false);
+  }
+}
+
+bool fsm_layoutVerifyMessage(const uint8_t *msg, uint32_t len) {
+  if (is_valid_ascii(msg, len)) {
+    return fsm_layoutPaginated(_("Verified message?"), msg, len, true);
+  } else {
+    return fsm_layoutPaginated(_("Verified binary message?"), msg, len, false);
+  }
+}
+
 void fsm_msgRebootToBootloader(void) {
   layoutDialogSwipe(&bmp_icon_question, _("Cancel"), _("Confirm"), NULL,
                     _("Do you want to"), _("restart device in"),

legacy/firmware/fsm.h

@@ -135,4 +135,7 @@ void fsm_msgStellarBumpSequenceOp(const StellarBumpSequenceOp *msg);
 
 void fsm_msgRebootToBootloader(void);
 
+bool fsm_layoutSignMessage(const uint8_t *msg, uint32_t len);
+bool fsm_layoutVerifyMessage(const uint8_t *msg, uint32_t len);
+
 #endif

legacy/firmware/fsm_msg_coin.h

@@ -286,8 +286,7 @@ void fsm_msgSignMessage(const SignMessage *msg) {
     return;
   }
 
-  layoutSignMessage(msg->message.bytes, msg->message.size);
-  if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
+  if (!fsm_layoutSignMessage(msg->message.bytes, msg->message.size)) {
     fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
     layoutHome();
     return;
@@ -319,12 +318,13 @@ void fsm_msgVerifyMessage(const VerifyMessage *msg) {
       layoutHome();
       return;
     }
-    layoutVerifyMessage(msg->message.bytes, msg->message.size);
-    if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
+
+    if (!fsm_layoutVerifyMessage(msg->message.bytes, msg->message.size)) {
       fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
       layoutHome();
       return;
     }
+
     fsm_sendSuccess(_("Message verified"));
   } else {
     fsm_sendFailure(FailureType_Failure_DataError, _("Invalid signature"));

legacy/firmware/fsm_msg_ethereum.h

@@ -173,8 +173,7 @@ void fsm_msgEthereumSignMessage(const EthereumSignMessage *msg) {
     return;
   }
 
-  layoutSignMessage(msg->message.bytes, msg->message.size);
-  if (!protectButton(ButtonRequestType_ButtonRequest_ProtectCall, false)) {
+  if (!fsm_layoutSignMessage(msg->message.bytes, msg->message.size)) {
     fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
     layoutHome();
     return;
@@ -202,12 +201,13 @@ void fsm_msgEthereumVerifyMessage(const EthereumVerifyMessage *msg) {
     layoutHome();
     return;
   }
-  layoutVerifyMessage(msg->message.bytes, msg->message.size);
-  if (!protectButton(ButtonRequestType_ButtonRequest_Other, false)) {
+
+  if (!fsm_layoutVerifyMessage(msg->message.bytes, msg->message.size)) {
     fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
     layoutHome();
     return;
   }
+
   fsm_sendSuccess(_("Message verified"));
 
   layoutHome();

legacy/firmware/layout2.c

@@ -445,7 +445,7 @@ void layoutConfirmOmni(const uint8_t *data, uint32_t size) {
                     NULL);
 }
 
-static bool is_valid_ascii(const uint8_t *data, uint32_t size) {
+bool is_valid_ascii(const uint8_t *data, uint32_t size) {
   for (uint32_t i = 0; i < size; i++) {
     if (data[i] < ' ' || data[i] > '~') {
       return false;
@@ -603,36 +603,6 @@ void layoutConfirmNondefaultLockTime(uint32_t lock_time,
   }
 }
 
-void layoutSignMessage(const uint8_t *msg, uint32_t len) {
-  const char **str = NULL;
-  if (!is_valid_ascii(msg, len)) {
-    str = split_message_hex(msg, len);
-    layoutDialogSwipe(&bmp_icon_question, _("Cancel"), _("Confirm"),
-                      _("Sign binary message?"), str[0], str[1], str[2], str[3],
-                      NULL, NULL);
-  } else {
-    str = split_message(msg, len, 20);
-    layoutDialogSwipe(&bmp_icon_question, _("Cancel"), _("Confirm"),
-                      _("Sign message?"), str[0], str[1], str[2], str[3], NULL,
-                      NULL);
-  }
-}
-
-void layoutVerifyMessage(const uint8_t *msg, uint32_t len) {
-  const char **str = NULL;
-  if (!is_valid_ascii(msg, len)) {
-    str = split_message_hex(msg, len);
-    layoutDialogSwipe(&bmp_icon_info, _("Cancel"), _("Confirm"),
-                      _("Verified binary message"), str[0], str[1], str[2],
-                      str[3], NULL, NULL);
-  } else {
-    str = split_message(msg, len, 20);
-    layoutDialogSwipe(&bmp_icon_info, _("Cancel"), _("Confirm"),
-                      _("Verified message"), str[0], str[1], str[2], str[3],
-                      NULL, NULL);
-  }
-}
-
 void layoutVerifyAddress(const CoinInfo *coin, const char *address) {
   render_address_dialog(coin, address, _("Confirm address?"),
                         _("Message signed by:"), 0);

legacy/firmware/layout2.h

@@ -65,9 +65,7 @@ void layoutFeeOverThreshold(const CoinInfo *coin, AmountUnit amount_unit,
 void layoutChangeCountOverThreshold(uint32_t change_count);
 void layoutConfirmNondefaultLockTime(uint32_t lock_time,
                                      bool lock_time_disabled);
-void layoutSignMessage(const uint8_t *msg, uint32_t len);
 void layoutVerifyAddress(const CoinInfo *coin, const char *address);
-void layoutVerifyMessage(const uint8_t *msg, uint32_t len);
 void layoutCipherKeyValue(bool encrypt, const char *key);
 void layoutEncryptMessage(const uint8_t *msg, uint32_t len, bool signing);
 void layoutDecryptMessage(const uint8_t *msg, uint32_t len,
@@ -110,4 +108,6 @@ void layoutConfirmSafetyChecks(SafetyCheckLevel safety_checks_level);
 const char **split_message(const uint8_t *msg, uint32_t len, uint32_t rowlen);
 const char **split_message_hex(const uint8_t *msg, uint32_t len);
 
+bool is_valid_ascii(const uint8_t *data, uint32_t size);
+
 #endif