static void test_privkey_valid_enc(const char *base58_str, cstring *payload, bool compress, bool is_testnet) { assert(payload != NULL); cstring *pl = cstr_new_sz(payload->len + 1); cstr_append_buf(pl, payload->str, payload->len); if (compress) cstr_append_c(pl, 1); cstring *b58 = base58_encode_check( is_testnet ? PRIVKEY_ADDRESS_TEST : PRIVKEY_ADDRESS, true, pl->str, pl->len); assert(b58 != NULL); if (strcmp(b58->str, base58_str)) { fprintf(stderr, "base58: have %s, expected %s\n", b58->str, base58_str); assert(!strcmp(b58->str, base58_str)); } cstr_free(b58, true); cstr_free(pl, true); cstr_free(payload, true); }
static void test_privkey_valid_dec(const char *base58_str, cstring *payload, bool compress, bool is_testnet) { assert(payload != NULL); cstring *pl = cstr_new_sz(payload->len + 1); cstr_append_buf(pl, payload->str, payload->len); if (compress) cstr_append_c(pl, 1); unsigned char addrtype; cstring *dec = base58_decode_check(&addrtype, base58_str); assert(dec != NULL); if (is_testnet) assert(addrtype == PRIVKEY_ADDRESS_TEST); else assert(addrtype == PRIVKEY_ADDRESS); if (compress) { assert(dec->len == 33); assert(dec->str[32] == 1); } else assert(dec->len == 32); assert(dec->len == pl->len); assert(memcmp(dec->str, pl->str, pl->len) == 0); cstr_free(dec, true); cstr_free(pl, true); cstr_free(payload, true); }
cstring *bn_getvch(const mpz_t v) { /* get MPI format size */ size_t sz; char *buf = mpz_export(NULL, &sz, -1, 1, 1, 0, v); if (sz == 0) { free(buf); return cstr_new(NULL); } cstring *s_le = cstr_new_buf(buf, sz); free(buf); /* check if sign bit is available */ unsigned int msb = mpz_sizeinbase(v, 2); if ((!(msb & 0x07) && msb > 0)) { cstr_append_c(s_le, '\0'); sz++; } cstr_resize(s_le, sz); /* set sign bit */ if (mpz_sgn(v) == -1) { s_le->str[sz - 1] = (s_le->str[sz - 1] & 0xff) | 0x80; } return s_le; }
cstring *base58_encode_check(unsigned char addrtype, bool have_addrtype, const void *data, size_t data_len) { cstring *s = cstr_new_sz(data_len + 1 + 4); if (have_addrtype) cstr_append_c(s, addrtype); cstr_append_buf(s, data, data_len); unsigned char md32[4]; bu_Hash4(md32, s->str, s->len); cstr_append_buf(s, md32, 4); cstring *s_enc = base58_encode(s->str, s->len); cstr_free(s, true); return s_enc; }
cstring *base58_encode(const void *data_, size_t data_len) { const unsigned char *data = data_; BIGNUM bn58, bn0, bn, dv, rem; BN_CTX *ctx; ctx = BN_CTX_new(); BN_init(&bn58); BN_init(&bn0); BN_init(&bn); BN_init(&dv); BN_init(&rem); BN_set_word(&bn58, 58); BN_set_word(&bn0, 0); unsigned char swapbuf[data_len + 1]; bu_reverse_copy(swapbuf, data, data_len); swapbuf[data_len] = 0; bn_setvch(&bn, swapbuf, sizeof(swapbuf)); cstring *rs = cstr_new_sz(data_len * 138 / 100 + 1); while (BN_cmp(&bn, &bn0) > 0) { if (!BN_div(&dv, &rem, &bn, &bn58, ctx)) goto err_out; BN_copy(&bn, &dv); unsigned int c = (int32_t)BN_get_word(&rem); cstr_append_c(rs, base58_chars[c]); } unsigned int i; for (i = 0; i < data_len; i++) { if (data[i] == 0) cstr_append_c(rs, base58_chars[0]); else break; } cstring *rs_swap = cstr_new_sz(rs->len); cstr_resize(rs_swap, rs->len); bu_reverse_copy((unsigned char *) rs_swap->str, (unsigned char *) rs->str, rs->len); cstr_free(rs, true); rs = rs_swap; out: BN_clear_free(&bn58); BN_clear_free(&bn0); BN_clear_free(&bn); BN_clear_free(&dv); BN_clear_free(&rem); BN_CTX_free(ctx); return rs; err_out: cstr_free(rs, true); rs = NULL; goto out; }
static bool bp_script_eval(parr *stack, const cstring *script, const struct bp_tx *txTo, unsigned int nIn, unsigned int flags, int nHashType) { struct const_buffer pc = { script->str, script->len }; struct const_buffer pend = { script->str + script->len, 0 }; struct const_buffer pbegincodehash = { script->str, script->len }; struct bscript_op op; bool rc = false; cstring *vfExec = cstr_new(NULL); parr *altstack = parr_new(0, buffer_freep); mpz_t bn, bn_Zero, bn_One; mpz_init(bn); mpz_init_set_ui(bn_Zero, 0); mpz_init_set_ui(bn_One,1); if (script->len > MAX_SCRIPT_SIZE) goto out; unsigned int nOpCount = 0; bool fRequireMinimal = (flags & SCRIPT_VERIFY_MINIMALDATA) != 0; struct bscript_parser bp; bsp_start(&bp, &pc); while (pc.p < pend.p) { bool fExec = !count_false(vfExec); if (!bsp_getop(&op, &bp)) goto out; enum opcodetype opcode = op.op; if (op.data.len > MAX_SCRIPT_ELEMENT_SIZE) goto out; if (opcode > OP_16 && ++nOpCount > MAX_OPS_PER_SCRIPT) goto out; if (disabled_op[opcode]) goto out; if (fExec && 0 <= opcode && opcode <= OP_PUSHDATA4) { if (fRequireMinimal && !CheckMinimalPush(&op.data, opcode)) goto out; stack_push(stack, (struct buffer *) &op.data); } else if (fExec || (OP_IF <= opcode && opcode <= OP_ENDIF)) switch (opcode) { // // Push value // case OP_1NEGATE: case OP_1: case OP_2: case OP_3: case OP_4: case OP_5: case OP_6: case OP_7: case OP_8: case OP_9: case OP_10: case OP_11: case OP_12: case OP_13: case OP_14: case OP_15: case OP_16: mpz_set_si(bn, (int)opcode - (int)(OP_1 - 1)); stack_push_str(stack, bn_getvch(bn)); break; // // Control // case OP_NOP: break; case OP_CHECKLOCKTIMEVERIFY: { if (!(flags & SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY)) { // not enabled; treat as a NOP2 if (flags & SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS) goto out; break; } if (stack->len < 1) goto out; // Note that elsewhere numeric opcodes are limited to // operands in the range -2**31+1 to 2**31-1, however it is // legal for opcodes to produce results exceeding that // range. This limitation is implemented by CastToBigNum's // default 4-byte limit. // // If we kept to that limit we'd have a year 2038 problem, // even though the nLockTime field in transactions // themselves is uint32 which only becomes meaningless // after the year 2106. // // Thus as a special case we tell CastToBigNum to accept up // to 5-byte bignums, which are good until 2**39-1, well // beyond the 2**32-1 limit of the nLockTime field itself. if (!CastToBigNum(bn, stacktop(stack, -1), fRequireMinimal, 5)) goto out; // In the rare event that the argument may be < 0 due to // some arithmetic being done first, you can always use // 0 MAX CHECKLOCKTIMEVERIFY. if (mpz_sgn(bn) < 0) goto out; uint64_t nLockTime = mpz_get_ui(bn); // Actually compare the specified lock time with the transaction. if (!CheckLockTime(nLockTime, txTo, nIn)) goto out; break; } case OP_CHECKSEQUENCEVERIFY: { if (!(flags & SCRIPT_VERIFY_CHECKSEQUENCEVERIFY)) { // not enabled; treat as a NOP3 if (flags & SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS) goto out; break; } if (stack->len < 1) goto out; // nSequence, like nLockTime, is a 32-bit unsigned integer // field. See the comment in CHECKLOCKTIMEVERIFY regarding // 5-byte numeric operands. if (!CastToBigNum(bn, stacktop(stack, -1), fRequireMinimal, 5)) goto out; // In the rare event that the argument may be < 0 due to // some arithmetic being done first, you can always use // 0 MAX CHECKSEQUENCEVERIFY. if (mpz_sgn(bn) < 0) goto out; uint32_t nSequence = mpz_get_ui(bn); // To provide for future soft-fork extensibility, if the // operand has the disabled lock-time flag set, // CHECKSEQUENCEVERIFY behaves as a NOP. if ((nSequence & SEQUENCE_LOCKTIME_DISABLE_FLAG) != 0) break; // Compare the specified sequence number with the input. if (!CheckSequence(nSequence, txTo, nIn)) goto out; break; } case OP_NOP1: case OP_NOP4: case OP_NOP5: case OP_NOP6: case OP_NOP7: case OP_NOP8: case OP_NOP9: case OP_NOP10: if (flags & SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS) goto out; break; case OP_IF: case OP_NOTIF: { // <expression> if [statements] [else [statements]] endif bool fValue = false; if (fExec) { if (stack->len < 1) goto out; struct buffer *vch = stacktop(stack, -1); fValue = CastToBool(vch); if (opcode == OP_NOTIF) fValue = !fValue; popstack(stack); } uint8_t vc = (uint8_t) fValue; cstr_append_c(vfExec, vc); break; } case OP_ELSE: { if (vfExec->len == 0) goto out; uint8_t *v = (uint8_t *) &vfExec->str[vfExec->len - 1]; *v = !(*v); break; } case OP_ENDIF: if (vfExec->len == 0) goto out; cstr_erase(vfExec, vfExec->len - 1, 1); break; case OP_VERIFY: { if (stack->len < 1) goto out; bool fValue = CastToBool(stacktop(stack, -1)); if (fValue) popstack(stack); else goto out; break; } case OP_RETURN: goto out; // // Stack ops // case OP_TOALTSTACK: if (stack->len < 1) goto out; stack_push(altstack, stacktop(stack, -1)); popstack(stack); break; case OP_FROMALTSTACK: if (altstack->len < 1) goto out; stack_push(stack, stacktop(altstack, -1)); popstack(altstack); break; case OP_2DROP: // (x1 x2 -- ) if (stack->len < 2) goto out; popstack(stack); popstack(stack); break; case OP_2DUP: { // (x1 x2 -- x1 x2 x1 x2) if (stack->len < 2) goto out; struct buffer *vch1 = stacktop(stack, -2); struct buffer *vch2 = stacktop(stack, -1); stack_push(stack, vch1); stack_push(stack, vch2); break; } case OP_3DUP: { // (x1 x2 x3 -- x1 x2 x3 x1 x2 x3) if (stack->len < 3) goto out; struct buffer *vch1 = stacktop(stack, -3); struct buffer *vch2 = stacktop(stack, -2); struct buffer *vch3 = stacktop(stack, -1); stack_push(stack, vch1); stack_push(stack, vch2); stack_push(stack, vch3); break; } case OP_2OVER: { // (x1 x2 x3 x4 -- x1 x2 x3 x4 x1 x2) if (stack->len < 4) goto out; struct buffer *vch1 = stacktop(stack, -4); struct buffer *vch2 = stacktop(stack, -3); stack_push(stack, vch1); stack_push(stack, vch2); break; } case OP_2ROT: { // (x1 x2 x3 x4 x5 x6 -- x3 x4 x5 x6 x1 x2) if (stack->len < 6) goto out; struct buffer *vch1 = stack_take(stack, -6); struct buffer *vch2 = stack_take(stack, -5); parr_remove_range(stack, stack->len - 6, 2); stack_push_nocopy(stack, vch1); stack_push_nocopy(stack, vch2); break; } case OP_2SWAP: // (x1 x2 x3 x4 -- x3 x4 x1 x2) if (stack->len < 4) goto out; stack_swap(stack, -4, -2); stack_swap(stack, -3, -1); break; case OP_IFDUP: { // (x - 0 | x x) if (stack->len < 1) goto out; struct buffer *vch = stacktop(stack, -1); if (CastToBool(vch)) stack_push(stack, vch); break; } case OP_DEPTH: // -- stacksize mpz_set_ui(bn, stack->len); stack_push_str(stack, bn_getvch(bn)); break; case OP_DROP: // (x -- ) if (stack->len < 1) goto out; popstack(stack); break; case OP_DUP: { // (x -- x x) if (stack->len < 1) goto out; struct buffer *vch = stacktop(stack, -1); stack_push(stack, vch); break; } case OP_NIP: // (x1 x2 -- x2) if (stack->len < 2) goto out; parr_remove_idx(stack, stack->len - 2); break; case OP_OVER: { // (x1 x2 -- x1 x2 x1) if (stack->len < 2) goto out; struct buffer *vch = stacktop(stack, -2); stack_push(stack, vch); break; } case OP_PICK: case OP_ROLL: { // (xn ... x2 x1 x0 n - xn ... x2 x1 x0 xn) // (xn ... x2 x1 x0 n - ... x2 x1 x0 xn) if (stack->len < 2) goto out; int n = stackint(stack, -1, fRequireMinimal); popstack(stack); if (n < 0 || n >= (int)stack->len) goto out; struct buffer *vch = stacktop(stack, -n-1); if (opcode == OP_ROLL) { vch = buffer_copy(vch->p, vch->len); parr_remove_idx(stack, stack->len - n - 1); stack_push_nocopy(stack, vch); } else stack_push(stack, vch); break; } case OP_ROT: { // (x1 x2 x3 -- x2 x3 x1) // x2 x1 x3 after first swap // x2 x3 x1 after second swap if (stack->len < 3) goto out; stack_swap(stack, -3, -2); stack_swap(stack, -2, -1); break; } case OP_SWAP: { // (x1 x2 -- x2 x1) if (stack->len < 2) goto out; stack_swap(stack, -2, -1); break; } case OP_TUCK: { // (x1 x2 -- x2 x1 x2) if (stack->len < 2) goto out; struct buffer *vch = stacktop(stack, -1); stack_insert(stack, vch, -2); break; } case OP_SIZE: { // (in -- in size) if (stack->len < 1) goto out; struct buffer *vch = stacktop(stack, -1); mpz_set_ui(bn, vch->len); stack_push_str(stack, bn_getvch(bn)); break; } case OP_EQUAL: case OP_EQUALVERIFY: { // (x1 x2 - bool) if (stack->len < 2) goto out; struct buffer *vch1 = stacktop(stack, -2); struct buffer *vch2 = stacktop(stack, -1); bool fEqual = buffer_equal(vch1, vch2); // OP_NOTEQUAL is disabled because it would be too easy to say // something like n != 1 and have some wiseguy pass in 1 with extra // zero bytes after it (numerically, 0x01 == 0x0001 == 0x000001) //if (opcode == OP_NOTEQUAL) // fEqual = !fEqual; popstack(stack); popstack(stack); stack_push_str(stack, fEqual ? bn_getvch(bn_One) : bn_getvch(bn_Zero)); if (opcode == OP_EQUALVERIFY) { if (fEqual) popstack(stack); else goto out; } break; } // // Numeric // case OP_1ADD: case OP_1SUB: case OP_NEGATE: case OP_ABS: case OP_NOT: case OP_0NOTEQUAL: { // (in -- out) if (stack->len < 1) goto out; if (!CastToBigNum(bn, stacktop(stack, -1), fRequireMinimal, nDefaultMaxNumSize)) goto out; switch (opcode) { case OP_1ADD: mpz_add_ui(bn, bn, 1); break; case OP_1SUB: mpz_sub_ui(bn, bn, 1); break; case OP_NEGATE: mpz_neg(bn, bn); break; case OP_ABS: mpz_abs(bn, bn); break; case OP_NOT: mpz_set_ui(bn, mpz_sgn(bn) == 0 ? 1 : 0); break; case OP_0NOTEQUAL: mpz_set_ui(bn, mpz_sgn(bn) == 0 ? 0 : 1); break; default: // impossible goto out; } popstack(stack); stack_push_str(stack, bn_getvch(bn)); break; } case OP_ADD: case OP_SUB: case OP_BOOLAND: case OP_BOOLOR: case OP_NUMEQUAL: case OP_NUMEQUALVERIFY: case OP_NUMNOTEQUAL: case OP_LESSTHAN: case OP_GREATERTHAN: case OP_LESSTHANOREQUAL: case OP_GREATERTHANOREQUAL: case OP_MIN: case OP_MAX: { // (x1 x2 -- out) if (stack->len < 2) goto out; mpz_t bn1, bn2; mpz_init(bn1); mpz_init(bn2); if (!CastToBigNum(bn1, stacktop(stack, -2), fRequireMinimal, nDefaultMaxNumSize) || !CastToBigNum(bn2, stacktop(stack, -1), fRequireMinimal, nDefaultMaxNumSize)) { mpz_clear(bn1); mpz_clear(bn2); goto out; } switch (opcode) { case OP_ADD: mpz_add(bn, bn1, bn2); break; case OP_SUB: mpz_sub(bn, bn1, bn2); break; case OP_BOOLAND: mpz_set_ui(bn, !(mpz_sgn(bn1) == 0) && !(mpz_sgn(bn2) == 0) ? 1 : 0); break; case OP_BOOLOR: mpz_set_ui(bn, !(mpz_sgn(bn1) == 0) || !(mpz_sgn(bn2) == 0) ? 1 : 0); break; case OP_NUMEQUAL: case OP_NUMEQUALVERIFY: mpz_set_ui(bn, mpz_cmp(bn1, bn2) == 0 ? 1 : 0); break; case OP_NUMNOTEQUAL: mpz_set_ui(bn, mpz_cmp(bn1, bn2) != 0 ? 1 : 0); break; case OP_LESSTHAN: mpz_set_ui(bn, mpz_cmp(bn1, bn2) < 0 ? 1 : 0); break; case OP_GREATERTHAN: mpz_set_ui(bn, mpz_cmp(bn1, bn2) > 0 ? 1 : 0); break; case OP_LESSTHANOREQUAL: mpz_set_ui(bn, mpz_cmp(bn1, bn2) <= 0 ? 1 : 0); break; case OP_GREATERTHANOREQUAL: mpz_set_ui(bn, mpz_cmp(bn1, bn2) >= 0 ? 1 : 0); break; case OP_MIN: if (mpz_cmp(bn1, bn2) < 0) mpz_set(bn, bn1); else mpz_set(bn, bn2); break; case OP_MAX: if (mpz_cmp(bn1, bn2) > 0) mpz_set(bn, bn1); else mpz_set(bn, bn2); break; default: // impossible break; } popstack(stack); popstack(stack); stack_push_str(stack, bn_getvch(bn)); mpz_clear(bn1); mpz_clear(bn2); if (opcode == OP_NUMEQUALVERIFY) { if (CastToBool(stacktop(stack, -1))) popstack(stack); else goto out; } break; } case OP_WITHIN: { // (x min max -- out) if (stack->len < 3) goto out; mpz_t bn1, bn2, bn3; mpz_init(bn1); mpz_init(bn2); mpz_init(bn3); bool rc1 = CastToBigNum(bn1, stacktop(stack, -3), fRequireMinimal, nDefaultMaxNumSize); bool rc2 = CastToBigNum(bn2, stacktop(stack, -2), fRequireMinimal, nDefaultMaxNumSize); bool rc3 = CastToBigNum(bn3, stacktop(stack, -1), fRequireMinimal, nDefaultMaxNumSize); bool fValue = (mpz_cmp(bn2, bn1) <= 0 && mpz_cmp(bn1, bn3) < 0); popstack(stack); popstack(stack); popstack(stack); stack_push_str(stack, fValue ? bn_getvch(bn_One) : bn_getvch(bn_Zero)); mpz_clear(bn1); mpz_clear(bn2); mpz_clear(bn3); if (!rc1 || !rc2 || !rc3) goto out; break; } // // Crypto // case OP_RIPEMD160: case OP_SHA1: case OP_SHA256: case OP_HASH160: case OP_HASH256: { // (in -- hash) if (stack->len < 1) goto out; struct buffer *vch = stacktop(stack, -1); unsigned int hashlen; unsigned char md[32]; switch (opcode) { case OP_RIPEMD160: hashlen = 20; ripemd160(vch->p, vch->len, md); break; case OP_SHA1: hashlen = 20; sha1_Raw(vch->p, vch->len, md); break; case OP_SHA256: hashlen = 32; sha256_Raw(vch->p, vch->len, md); break; case OP_HASH160: hashlen = 20; bu_Hash160(md, vch->p, vch->len); break; case OP_HASH256: hashlen = 32; bu_Hash(md, vch->p, vch->len); break; default: // impossible goto out; } popstack(stack); struct buffer buf = { md, hashlen }; stack_push(stack, &buf); break; } case OP_CODESEPARATOR: // Hash starts after the code separator memcpy(&pbegincodehash, &pc, sizeof(pc)); break; case OP_CHECKSIG: case OP_CHECKSIGVERIFY: { // (sig pubkey -- bool) if (stack->len < 2) goto out; struct buffer *vchSig = stacktop(stack, -2); struct buffer *vchPubKey = stacktop(stack, -1); // Subset of script starting at the most recent codeseparator cstring *scriptCode = cstr_new_buf(pbegincodehash.p, pbegincodehash.len); // Drop the signature, since there's no way for // a signature to sign itself string_find_del(scriptCode, vchSig); if (!CheckSignatureEncoding(vchSig, flags) || !CheckPubKeyEncoding(vchPubKey, flags)) { cstr_free(scriptCode, true); goto out; } bool fSuccess = bp_checksig(vchSig, vchPubKey, scriptCode, txTo, nIn); cstr_free(scriptCode, true); popstack(stack); popstack(stack); stack_push_str(stack, fSuccess ? bn_getvch(bn_One) : bn_getvch(bn_Zero)); if (opcode == OP_CHECKSIGVERIFY) { if (fSuccess) popstack(stack); else goto out; } break; } case OP_CHECKMULTISIG: case OP_CHECKMULTISIGVERIFY: { // ([sig ...] num_of_signatures [pubkey ...] num_of_pubkeys -- bool) int i = 1; if ((int)stack->len < i) goto out; int nKeysCount = stackint(stack, -i, fRequireMinimal); if (nKeysCount < 0 || nKeysCount > MAX_PUBKEYS_PER_MULTISIG) goto out; nOpCount += nKeysCount; if (nOpCount > MAX_OPS_PER_SCRIPT) goto out; int ikey = ++i; i += nKeysCount; if ((int)stack->len < i) goto out; int nSigsCount = stackint(stack, -i, fRequireMinimal); if (nSigsCount < 0 || nSigsCount > nKeysCount) goto out; int isig = ++i; i += nSigsCount; if ((int)stack->len < i) goto out; // Subset of script starting at the most recent codeseparator cstring *scriptCode = cstr_new_buf(pbegincodehash.p, pbegincodehash.len); // Drop the signatures, since there's no way for // a signature to sign itself int k; for (k = 0; k < nSigsCount; k++) { struct buffer *vchSig =stacktop(stack, -isig-k); string_find_del(scriptCode, vchSig); } bool fSuccess = true; while (fSuccess && nSigsCount > 0) { struct buffer *vchSig = stacktop(stack, -isig); struct buffer *vchPubKey = stacktop(stack, -ikey); // Note how this makes the exact order of pubkey/signature evaluation // distinguishable by CHECKMULTISIG NOT if the STRICTENC flag is set. // See the script_(in)valid tests for details. if (!CheckSignatureEncoding(vchSig, flags) || !CheckPubKeyEncoding(vchPubKey, flags)) { cstr_free(scriptCode, true); goto out; } // Check signature bool fOk = bp_checksig(vchSig, vchPubKey, scriptCode, txTo, nIn); if (fOk) { isig++; nSigsCount--; } ikey++; nKeysCount--; // If there are more signatures left than keys left, // then too many signatures have failed if (nSigsCount > nKeysCount) fSuccess = false; } cstr_free(scriptCode, true); // Clean up stack of actual arguments while (i-- > 1) popstack(stack); // A bug causes CHECKMULTISIG to consume one extra argument // whose contents were not checked in any way. // // Unfortunately this is a potential source of mutability, // so optionally verify it is exactly equal to zero prior // to removing it from the stack. if ((int)stack->len < 1) goto out; if ((flags & SCRIPT_VERIFY_NULLDUMMY) && stacktop(stack, -1)->len) goto out; popstack(stack); stack_push_str(stack, fSuccess ? bn_getvch(bn_One) : bn_getvch(bn_Zero)); if (opcode == OP_CHECKMULTISIGVERIFY) { if (fSuccess) popstack(stack); else goto out; } break; } default: goto out; } // Size limits if (stack->len + altstack->len > 1000) goto out; } rc = (vfExec->len == 0 && bp.error == false); out: mpz_clears(bn, bn_Zero, bn_One, NULL); parr_free(altstack, true); cstr_free(vfExec, true); return rc; }
void bp_tx_sigserializer(cstring *s, const cstring *scriptCode, const struct bp_tx *txTo, unsigned int nIn, int nHashType) { const bool fAnyoneCanPay = (!!(nHashType & SIGHASH_ANYONECANPAY)); const bool fHashSingle = ((nHashType & 0x1f) == SIGHASH_SINGLE); const bool fHashNone = ((nHashType & 0x1f) == SIGHASH_NONE); /** Serialize txTo */ // Serialize nVersion ser_u32(s, txTo->nVersion); // Serialize vin unsigned int nInputs = fAnyoneCanPay ? 1 : txTo->vin->len; ser_varlen(s, nInputs); unsigned int nInput; for (nInput = 0; nInput < nInputs; nInput++) { /** Serialize an input of txTo */ // In case of SIGHASH_ANYONECANPAY, only the input being signed is serialized if (fAnyoneCanPay) nInput = nIn; struct bp_txin *txin = parr_idx(txTo->vin, nInput); // Serialize the prevout ser_bp_outpt(s, &txin->prevout); // Serialize the script if (nInput != nIn) // Blank out other inputs' signatures ser_varlen(s, (int)0); else if (scriptCode == NULL) cstr_append_c(s, 0); else { /** Serialize the passed scriptCode, skipping OP_CODESEPARATORs */ struct const_buffer it = { scriptCode->str, scriptCode->len }; struct const_buffer itBegin = it; struct bscript_op op; unsigned int nCodeSeparators = 0; struct bscript_parser bp; bsp_start(&bp, &it); while (bsp_getop(&op, &bp)) { if (op.op == OP_CODESEPARATOR) nCodeSeparators++; } ser_varlen(s, scriptCode->len - nCodeSeparators); it = itBegin; bsp_start(&bp, &it); while (bsp_getop(&op, &bp)) { if (op.op == OP_CODESEPARATOR) { ser_bytes(s, itBegin.p, it.p - itBegin.p - 1); itBegin = it; } } if (itBegin.p != scriptCode->str + scriptCode->len) ser_bytes(s, itBegin.p, it.p - itBegin.p); } // Serialize the nSequence if ((nInput != nIn) && (fHashSingle || fHashNone)) // let the others update at will ser_u32(s, (int)0); else ser_u32(s, txin->nSequence); } // Serialize vout unsigned int nOutputs = fHashNone ? 0 : (fHashSingle ? (nIn + 1) : txTo->vout->len); ser_varlen(s, nOutputs); unsigned int nOutput; for (nOutput = 0; nOutput < nOutputs; nOutput++) { struct bp_txout *txout = parr_idx(txTo->vout, nOutput); if (fHashSingle && (nOutput != nIn)) // Do not lock-in the txout payee at other indices as txin; bp_txout_set_null(txout); ser_bp_txout(s, txout); } // Serialize nLockTime ser_u32(s, txTo->nLockTime); }