Merge Starkware branch

2020-06-27 13:24:04 +02:00
parent 20e9f46c3c
commit 8d0544bf68
57 changed files with 4439 additions and 2243 deletions
--- a/src/stark_crypto.c
+++ b/src/stark_crypto.c
@@ -0,0 +1,85 @@
+#ifdef HAVE_STARKWARE
+
+#include "shared_context.h"
+#include "stark_utils.h"
+#include "ui_callbacks.h"
+#include "utils.h"
+
+static unsigned char const C_cx_Stark256_n[]  = {
+  //n: 0x0800000000000010ffffffffffffffffb781126dcae7b2321e66a241adc64d2f
+  0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xb7, 0x81, 0x12, 0x6d, 0xca, 0xe7, 0xb2, 0x32, 0x1e, 0x66, 0xa2, 0x41, 0xad, 0xc6, 0x4d, 0x2f};
+  
+  // C_cx_secp256k1_n - (C_cx_secp256k1_n % C_cx_Stark256_n)
+static unsigned char const STARK_DERIVE_BIAS[] = {
+  0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x0e, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf7,
+  0x38, 0xa1, 0x3b, 0x4b, 0x92, 0x0e, 0x94, 0x11, 0xae, 0x6d, 0xa5, 0xf4, 0x0b, 0x03, 0x58, 0xb1
+}; 
+
+void starkDerivePrivateKey(uint32_t *bip32Path, uint32_t bip32PathLength, uint8_t *privateKeyData) {  
+#if 0  
+  // Sanity check 
+  if (bip32Path[0] != STARK_BIP32_PATH_0)  {
+    PRINTF("Invalid Stark derivation path %d\n", bip32Path[0]);
+    THROW(0x6a80);
+  }
+  os_perso_derive_node_bip32(CX_CURVE_256K1, bip32Path, bip32PathLength, privateKeyData, NULL);  
+  PRINTF("Private key before processing %.*H\n", 32, privateKeyData);
+  // TODO - support additional schemes
+  cx_math_modm(privateKeyData, 32, C_cx_Stark256_n, 32);
+  PRINTF("Private key after processing %.*H\n", 32, privateKeyData);
+#else
+  uint8_t tmp[33];
+  uint8_t index = 0;
+  // Sanity check 
+  if ((bip32PathLength < 2) || (bip32Path[0] != STARK_BIP32_PATH_0) || (bip32Path[1] != STARK_BIP32_PATH_1))  {
+    PRINTF("Invalid Stark derivation path %d %d\n", bip32Path[0], bip32Path[1]);
+    THROW(0x6a80);
+  }
+  os_perso_derive_node_bip32(CX_CURVE_256K1, bip32Path, bip32PathLength, tmp, NULL);  
+  PRINTF("Private key before processing %.*H\n", 32, tmp);
+  for(;;) {
+    tmp[32] = index;
+    cx_hash_sha256(tmp, 33, privateKeyData, 32);
+    if (cx_math_cmp(privateKeyData, STARK_DERIVE_BIAS, 32) < 0) {
+      cx_math_modm(privateKeyData, 32, C_cx_Stark256_n, 32);
+      break;
+    }
+    index++;
+  }
+
+#endif  
+}
+
+void stark_get_amount_string(uint8_t *contractAddress, uint8_t *quantum256, uint8_t *amount64, char *tmp100, char *target100) {
+  uint256_t amountPre, quantum, amount;
+  uint8_t decimals;    
+  char *ticker = (char*)PIC(chainConfig->coinName);  
+
+  PRINTF("stark_get_amount_string %.*H\n", 20, contractAddress);
+
+  if (allzeroes(contractAddress, 20)) {
+    decimals = WEI_TO_ETHER;
+    PRINTF("stark_get_amount_string - ETH\n");
+  }
+  else {
+    tokenDefinition_t *token = getKnownToken(contractAddress);
+    if (token == NULL) { // caught earlier
+      THROW(0x6A80);
+    }
+    decimals = token->decimals;
+    ticker = (char*)token->ticker;
+    PRINTF("stark_get_amount_string - decimals %d ticker %s\n", decimals, ticker);
+  }
+  convertUint256BE(amount64, 8, &amountPre);
+  readu256BE(quantum256, &quantum);
+  mul256(&amountPre, &quantum, &amount);
+  tostring256(&amount, 10, tmp100, 100);
+  PRINTF("stark_get_amount_string - mul256 %s\n", tmp100);
+  strcpy(target100, ticker);
+  adjustDecimals(tmp100, strlen(tmp100), target100 + strlen(ticker), 100, decimals);
+  PRINTF("get_amount_string %s\n", target100);
+}
+
+
+#endif // HAVE_STARK