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-rw-r--r--src/crypto/internal/boring/bbig/big.go33
1 files changed, 33 insertions, 0 deletions
diff --git a/src/crypto/internal/boring/bbig/big.go b/src/crypto/internal/boring/bbig/big.go
new file mode 100644
index 0000000..5ce4697
--- /dev/null
+++ b/src/crypto/internal/boring/bbig/big.go
@@ -0,0 +1,33 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bbig
+
+import (
+ "crypto/internal/boring"
+ "math/big"
+ "unsafe"
+)
+
+func Enc(b *big.Int) boring.BigInt {
+ if b == nil {
+ return nil
+ }
+ x := b.Bits()
+ if len(x) == 0 {
+ return boring.BigInt{}
+ }
+ return unsafe.Slice((*uint)(&x[0]), len(x))
+}
+
+func Dec(b boring.BigInt) *big.Int {
+ if b == nil {
+ return nil
+ }
+ if len(b) == 0 {
+ return new(big.Int)
+ }
+ x := unsafe.Slice((*big.Word)(&b[0]), len(b))
+ return new(big.Int).SetBits(x)
+}