fix(*): Vendored project dependencies

vendor/github.com/pjbgf/sha1cd/cgo/sha1.go

@@ -0,0 +1,78 @@
+package cgo
+
+// #include <sha1.h>
+// #include <ubc_check.h>
+import "C"
+
+import (
+	"crypto"
+	"hash"
+	"unsafe"
+)
+
+const (
+	Size      = 20
+	BlockSize = 64
+)
+
+func init() {
+	crypto.RegisterHash(crypto.SHA1, New)
+}
+
+func New() hash.Hash {
+	d := new(digest)
+	d.Reset()
+	return d
+}
+
+type digest struct {
+	ctx C.SHA1_CTX
+}
+
+func (d *digest) sum() ([]byte, bool) {
+	b := make([]byte, Size)
+	c := C.SHA1DCFinal((*C.uchar)(unsafe.Pointer(&b[0])), &d.ctx)
+	if c != 0 {
+		return b, true
+	}
+
+	return b, false
+}
+
+func (d *digest) Sum(in []byte) []byte {
+	d0 := *d // use a copy of d to avoid race conditions.
+	h, _ := d0.sum()
+	return append(in, h...)
+}
+
+func (d *digest) CollisionResistantSum(in []byte) ([]byte, bool) {
+	d0 := *d // use a copy of d to avoid race conditions.
+	h, c := d0.sum()
+	return append(in, h...), c
+}
+
+func (d *digest) Reset() {
+	C.SHA1DCInit(&d.ctx)
+}
+
+func (d *digest) Size() int { return Size }
+
+func (d *digest) BlockSize() int { return BlockSize }
+
+func Sum(data []byte) ([]byte, bool) {
+	d := New().(*digest)
+	d.Write(data)
+
+	return d.sum()
+}
+
+func (d *digest) Write(p []byte) (nn int, err error) {
+	if len(p) == 0 {
+		return 0, nil
+	}
+
+	data := (*C.char)(unsafe.Pointer(&p[0]))
+	C.SHA1DCUpdate(&d.ctx, data, (C.size_t)(len(p)))
+
+	return len(p), nil
+}