Merge Starkware branch

src_features/signMessage/ui_common_signMessage.c

@@ -0,0 +1,53 @@
+#include "shared_context.h"
+#include "ui_callbacks.h"
+
+unsigned int io_seproxyhal_touch_signMessage_ok(const bagl_element_t *e) {
+    uint8_t privateKeyData[32];
+    uint8_t signature[100];
+    uint8_t signatureLength;
+    cx_ecfp_private_key_t privateKey;
+    uint32_t tx = 0;
+    io_seproxyhal_io_heartbeat();
+    os_perso_derive_node_bip32(
+        CX_CURVE_256K1, tmpCtx.messageSigningContext.bip32Path,
+        tmpCtx.messageSigningContext.pathLength, privateKeyData, NULL);
+    io_seproxyhal_io_heartbeat();
+    cx_ecfp_init_private_key(CX_CURVE_256K1, privateKeyData, 32, &privateKey);
+    os_memset(privateKeyData, 0, sizeof(privateKeyData));
+    unsigned int info = 0;
+    io_seproxyhal_io_heartbeat();
+    signatureLength =
+        cx_ecdsa_sign(&privateKey, CX_RND_RFC6979 | CX_LAST, CX_SHA256,
+                      tmpCtx.messageSigningContext.hash,
+                      sizeof(tmpCtx.messageSigningContext.hash), signature, sizeof(signature), &info);
+    os_memset(&privateKey, 0, sizeof(privateKey));
+    G_io_apdu_buffer[0] = 27;
+    if (info & CX_ECCINFO_PARITY_ODD) {
+      G_io_apdu_buffer[0]++;
+    }
+    if (info & CX_ECCINFO_xGTn) {
+      G_io_apdu_buffer[0] += 2;
+    }
+    format_signature_out(signature);
+    tx = 65;
+    G_io_apdu_buffer[tx++] = 0x90;
+    G_io_apdu_buffer[tx++] = 0x00;
+    reset_app_context();
+    // Send back the response, do not restart the event loop
+    io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, tx);
+    // Display back the original UX
+    ui_idle();
+    return 0; // do not redraw the widget
+}
+
+unsigned int io_seproxyhal_touch_signMessage_cancel(const bagl_element_t *e) {
+    reset_app_context();
+    G_io_apdu_buffer[0] = 0x69;
+    G_io_apdu_buffer[1] = 0x85;
+    // Send back the response, do not restart the event loop
+    io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, 2);
+    // Display back the original UX
+    ui_idle();
+    return 0; // do not redraw the widget
+}
+