all: add option to bypass input passphrase from terminal

In the environment where passphrase cannot be inputted manually, for
example, automatic integration or deployment, we need some mechanism
where awwan can be executed to copy or decrypt the encrypted file.

The option is by reading plain passphrase from file named "awwan.pass"
inside the ".ssh" directory.
If its exists and not empty, awwan will not prompt for passphrase from
terminal, instead use the content of that file as passhprase.

4 files changed, 10 insertions, 0 deletions

diff --git a/testdata/encrypt-with-passfile/.ssh/awwan.key b/testdata/encrypt-with-passfile/.ssh/awwan.key
new file mode 120000
index 0000000..59f8d8e
--- /dev/null
+++ b/testdata/encrypt-with-passfile/.ssh/awwan.key
@@ -0,0 +1 @@
+../../encrypt-with-passphrase/.ssh/awwan.key
\ No newline at end of file
diff --git a/testdata/encrypt-with-passfile/.ssh/awwan.pass b/testdata/encrypt-with-passfile/.ssh/awwan.pass
new file mode 100644
index 0000000..55b8390
--- /dev/null
+++ b/testdata/encrypt-with-passfile/.ssh/awwan.pass
@@ -0,0 +1 @@
+s3cret
\ No newline at end of file
diff --git a/testdata/encrypt-with-passfile/plain.txt b/testdata/encrypt-with-passfile/plain.txt
new file mode 100644
index 0000000..a769b9d
--- /dev/null
+++ b/testdata/encrypt-with-passfile/plain.txt
@@ -0,0 +1,2 @@
+[secret]
+pass = thisisasecret
diff --git a/testdata/encrypt-with-passfile/test.data b/testdata/encrypt-with-passfile/test.data
new file mode 100644
index 0000000..a7bdd69
--- /dev/null
+++ b/testdata/encrypt-with-passfile/test.data
@@ -0,0 +1,6 @@
+Test encrypt and decrypt with passhrase stored in ".ssh/awwan.pass".
+
+<<< plain.txt
+[secret]
+pass = thisisasecret
+