Add vendor (steam)

1 files changed, 25 insertions, 0 deletions

diff --git a/vendor/github.com/Philipp15b/go-steam/cryptoutil/pkcs7.go b/vendor/github.com/Philipp15b/go-steam/cryptoutil/pkcs7.go
new file mode 100644
index 00000000..8200fb94
--- /dev/null
+++ b/vendor/github.com/Philipp15b/go-steam/cryptoutil/pkcs7.go
@@ -0,0 +1,25 @@
+package cryptoutil

+

+import (

+	"crypto/aes"

+)

+

+// Returns a new byte array padded with PKCS7 and prepended

+// with empty space of the AES block size (16 bytes) for the IV.

+func padPKCS7WithIV(src []byte) []byte {

+	missing := aes.BlockSize - (len(src) % aes.BlockSize)

+	newSize := len(src) + aes.BlockSize + missing

+	dest := make([]byte, newSize, newSize)

+	copy(dest[aes.BlockSize:], src)

+

+	padding := byte(missing)

+	for i := newSize - missing; i < newSize; i++ {

+		dest[i] = padding

+	}

+	return dest

+}

+

+func unpadPKCS7(src []byte) []byte {

+	padLen := src[len(src)-1]

+	return src[:len(src)-int(padLen)]

+}