From f4e568479e04cad58c9f37d7034ec7c71562743b Mon Sep 17 00:00:00 2001
From: kalipso <kalipso@c3d2.de>
Date: Sat, 3 Aug 2024 23:13:22 +0200
Subject: [PATCH] start implementing crypto handling

---
 cmd/ppass/ppass.go |  3 +++
 crypto/crypto.go   | 56 ++++++++++++++++++++++++++++++++++++++++++++++
 go.mod             |  1 +
 go.sum             |  8 +++++--
 4 files changed, 66 insertions(+), 2 deletions(-)
 create mode 100644 crypto/crypto.go

diff --git a/cmd/ppass/ppass.go b/cmd/ppass/ppass.go
index d750a6f..d8b53c1 100644
--- a/cmd/ppass/ppass.go
+++ b/cmd/ppass/ppass.go
@@ -18,6 +18,7 @@ import (
 	logging "github.com/ipfs/go-log/v2"
 
 	"github.com/k4lipso/pentapass/storage"
+	"github.com/k4lipso/pentapass/crypto"
 )
 
 var (
@@ -32,6 +33,8 @@ var (
 
 
 func main() {
+	crypto.Encrypt()
+
 	flag.Parse()
 	ctx := context.Background()
 	data := *dbPath
diff --git a/crypto/crypto.go b/crypto/crypto.go
new file mode 100644
index 0000000..7dfdaca
--- /dev/null
+++ b/crypto/crypto.go
@@ -0,0 +1,56 @@
+package crypto
+
+import (
+	"fmt"
+	"bytes"
+	"io"
+	"encoding/json"
+
+	"filippo.io/age"
+)
+
+type Password struct {
+	Service string `json:"Service"`
+	Url string `json:"Url"`
+	Username string `json:"Username"`
+	Password string `json:"Password"`
+	Tags []string `json:"Tags"`
+}
+
+func (p *Password) ToJson() ([]byte, error) {
+	return json.Marshal(p)
+}
+
+func GetPasswordFromJson(b []byte) (Password, error) {
+	var result Password
+	err := json.Unmarshal(b, result)
+
+	if err != nil {
+		return Password{}, err
+	}
+
+	return result, nil
+}
+
+func Encrypt() {
+	publicKey := "age1cy0su9fwf3gf9mw868g5yut09p6nytfmmnktexz2ya5uqg9vl9sss4euqm"
+	recipient, err := age.ParseX25519Recipient(publicKey)
+	if err != nil {
+		fmt.Printf("Failed to parse public key %q: %v", publicKey, err)
+	}
+
+	out := &bytes.Buffer{}
+
+	w, err := age.Encrypt(out, recipient)
+	if err != nil {
+		fmt.Printf("Failed to create encrypted file: %v\n", err)
+	}
+	if _, err := io.WriteString(w, "Black lives matter."); err != nil {
+		fmt.Printf("Failed to write to encrypted file: %v\n", err)
+	}
+	if err := w.Close(); err != nil {
+		fmt.Printf("Failed to close encrypted file: %v\n", err)
+	}
+
+	fmt.Printf("Encrypted file size: %d\n", out.Len())
+}
diff --git a/go.mod b/go.mod
index a704b67..f667908 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module github.com/k4lipso/pentapass
 go 1.22.5
 
 require (
+	filippo.io/age v1.2.0
 	github.com/hsanjuan/ipfs-lite v1.8.2
 	github.com/ipfs/go-datastore v0.6.0
 	github.com/ipfs/go-ds-badger2 v0.1.3
diff --git a/go.sum b/go.sum
index a2fa0d4..0372eb3 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,5 @@
+c2sp.org/CCTV/age v0.0.0-20240306222714-3ec4d716e805 h1:u2qwJeEvnypw+OCPUHmoZE3IqwfuN5kgDfo5MLzpNM0=
+c2sp.org/CCTV/age v0.0.0-20240306222714-3ec4d716e805/go.mod h1:FomMrUJ2Lxt5jCLmZkG3FHa72zUprnhd3v/Z18Snm4w=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.31.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
@@ -6,6 +8,8 @@ dmitri.shuralyov.com/app/changes v0.0.0-20180602232624-0a106ad413e3/go.mod h1:Yl
 dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBrvjyP0v+ecvNYvCpyZgu5/xkfAUhi6wJj28eUfSU=
 dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
 dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
+filippo.io/age v1.2.0 h1:vRDp7pUMaAJzXNIWJVAZnEf/Dyi4Vu4wI8S1LBzufhE=
+filippo.io/age v1.2.0/go.mod h1:JL9ew2lTN+Pyft4RiNGguFfOpewKwSHm5ayKD/A4004=
 git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
 github.com/AndreasBriese/bbloom v0.0.0-20190825152654-46b345b51c96 h1:cTp8I5+VIoKjsnZuH8vjyaysT/ses3EvZeaV/1UkF2M=
 github.com/AndreasBriese/bbloom v0.0.0-20190825152654-46b345b51c96/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
@@ -443,8 +447,8 @@ github.com/quic-go/webtransport-go v0.8.0/go.mod h1:N99tjprW432Ut5ONql/aUhSLT0YV
 github.com/raulk/go-watchdog v1.3.0 h1:oUmdlHxdkXRJlwfG0O9omj8ukerm8MEQavSiDTEtBsk=
 github.com/raulk/go-watchdog v1.3.0/go.mod h1:fIvOnLbF0b0ZwkB9YU4mOW9Did//4vPZtDqv66NfsMU=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
-github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
-github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
+github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
+github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=