diff --git a/go.mod b/go.mod
index 14b919c..93cd5c6 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,6 @@ require (
 	github.com/aead/ecdh v0.2.0
 	github.com/aliyun/aliyun-oss-go-sdk v2.2.5+incompatible
 	github.com/andreburgaud/crypt2go v1.1.0
-	github.com/gaoyb7/115drive-webdav v0.1.8
 	github.com/go-resty/resty/v2 v2.7.0
 	github.com/pierrec/lz4/v4 v4.1.17
 	github.com/pkg/errors v0.9.1
@@ -15,13 +14,13 @@ require (
 )
 
 require (
-	github.com/bluele/gcache v0.0.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/kr/pretty v0.3.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/sirupsen/logrus v1.8.1 // indirect
+	github.com/rogpeppe/go-internal v1.8.0 // indirect
 	golang.org/x/crypto v0.0.0-20221005025214-4161e89ecf1b // indirect
 	golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 // indirect
-	golang.org/x/sys v0.0.0-20221006211917-84dc82d7e875 // indirect
 	golang.org/x/time v0.0.0-20220922220347-f3bd1da661af // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index bd924ac..432cb97 100644
--- a/go.sum
+++ b/go.sum
@@ -4,28 +4,12 @@ github.com/aliyun/aliyun-oss-go-sdk v2.2.5+incompatible h1:QoRMR0TCctLDqBCMyOu1e
 github.com/aliyun/aliyun-oss-go-sdk v2.2.5+incompatible/go.mod h1:T/Aws4fEfogEE9v+HPhhw+CntffsBHJ8nXQCwKr0/g8=
 github.com/andreburgaud/crypt2go v1.1.0 h1:eitZxTPY1krUsxinsng3Qvt/Ud7q/aQmmYRh8p4hyPw=
 github.com/andreburgaud/crypt2go v1.1.0/go.mod h1:4qhZPzarj1dCIRmCkpdgCklwp+hBq9yEt0zPe9Ayuhc=
-github.com/bluele/gcache v0.0.2 h1:WcbfdXICg7G/DGBh1PFfcirkWOQV+v077yF1pSy3DGw=
-github.com/bluele/gcache v0.0.2/go.mod h1:m15KV+ECjptwSPxKhOhQoAFQVtUFjTVkc3H8o0t/fp0=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/gaoyb7/115drive-webdav v0.1.8 h1:EJt4PSmcbvBY4KUh2zSo5p6fN9LZFNkIzuKejipubVw=
-github.com/gaoyb7/115drive-webdav v0.1.8/go.mod h1:BKbeY6j8SKs3+rzBFFALznGxbPmefEm3vA+dGhqgOGU=
-github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
-github.com/gin-gonic/gin v1.8.1/go.mod h1:ji8BvRH1azfM+SYow9zQ6SZMvR8qOMZHmsCuWR9tTTk=
-github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
-github.com/go-playground/locales v0.14.0/go.mod h1:sawfccIbzZTqEDETgFXqTho0QybSa7l++s0DH+LDiLs=
-github.com/go-playground/universal-translator v0.18.0/go.mod h1:UvRDBj+xPUEGrFYl+lu/H90nyDXpg0fqeB/AQUGNTVA=
-github.com/go-playground/validator/v10 v10.10.0/go.mod h1:74x4gJWsvQexRdW8Pn3dXSGrTK4nAUsbPlLADvpJkos=
-github.com/go-playground/validator/v10 v10.11.0/go.mod h1:i+3WkQ1FvaUjjxh1kSvIA4dMGDBiPU55YFDl0WbKdWU=
 github.com/go-resty/resty/v2 v2.7.0 h1:me+K9p3uhSmXtrBZ4k9jcEAfJmuC8IivWHwaLZwPrFY=
 github.com/go-resty/resty/v2 v2.7.0/go.mod h1:9PWDzw47qPphMRFfhsyk0NnSgvluHcljSMVIq3w7q0I=
-github.com/goccy/go-json v0.9.7/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
-github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
-github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
@@ -34,12 +18,6 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/leodido/go-urn v1.2.1/go.mod h1:zt4jvISO2HfUBqxjfIshjdMTYS56ZS/qv49ictyFfxY=
-github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
-github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
-github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
-github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
-github.com/pelletier/go-toml/v2 v2.0.1/go.mod h1:r9LEWfGN8R5k0VXJ+0BkIe7MYkRdwZOjgMj2KwnJFUo=
 github.com/pierrec/lz4/v4 v4.1.17 h1:kV4Ip+/hUBC+8T6+2EgburRtkE9ef4nbY3f4dFhGjMc=
 github.com/pierrec/lz4/v4 v4.1.17/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
@@ -50,61 +28,33 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
 github.com/rogpeppe/go-internal v1.8.0 h1:FCbCCtXNOY3UtUuHUYaghJg4y7Fd14rXifAYUAtL9R8=
 github.com/rogpeppe/go-internal v1.8.0/go.mod h1:WmiCO8CzOY8rg0OYDC4/i/2WRWAB6poM+XZ2dLUbcbE=
-github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
-github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e h1:MRM5ITcdelLK2j1vwZ3Je0FKVCfqOLp5zO6trqMLYs0=
 github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e/go.mod h1:XV66xRDqSt+GTGFMVlhk3ULuV0y9ZmzeVGR4mloJI3M=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
-github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/ugorji/go v1.2.7/go.mod h1:nF9osbDWLy6bDVv/Rtoh6QgnvNDpmCalQV5urGCCS6M=
-github.com/ugorji/go/codec v1.2.7/go.mod h1:WGN1fab3R1fzQlVQTkfxVtIBhWDRqOviHU95kRgeqEY=
 golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.0.0-20221005025214-4161e89ecf1b h1:huxqepDufQpLLIRXiVkTvnxrzJlpwmIWAObmcCcUFr0=
 golang.org/x/crypto v0.0.0-20221005025214-4161e89ecf1b/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20211029224645-99673261e6eb/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 h1:CIJ76btIcR3eFI5EgSo6k1qKw9KJexJuRLI9G7Hp5wE=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220702020025-31831981b65f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20221006211917-84dc82d7e875 h1:AzgQNqF+FKwyQ5LbVrVqOcuuFB67N47F9+htZYH0wFM=
-golang.org/x/sys v0.0.0-20221006211917-84dc82d7e875/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/time v0.0.0-20220722155302-e5dcc9cfc0b9/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20220922220347-f3bd1da661af h1:Yx9k8YCG3dvF87UAn2tu2HQLf2dt/eR1bXxpLMWeH+Y=
 golang.org/x/time v0.0.0-20220922220347-f3bd1da661af/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/pkg/crypto/m115/public.go b/pkg/crypto/m115/public.go
new file mode 100644
index 0000000..457de1a
--- /dev/null
+++ b/pkg/crypto/m115/public.go
@@ -0,0 +1,47 @@
+package m115
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+	"io"
+)
+
+type Key [16]byte
+
+func GenerateKey() Key {
+	key := Key{}
+	_, _ = io.ReadFull(rand.Reader, key[:])
+	return key
+}
+
+func Encode(input []byte, key Key) (output string) {
+	// Prepare buffer
+	buf := make([]byte, 16+len(input))
+	// Copy key and data to buffer
+	copy(buf, key[:])
+	copy(buf[16:], input)
+	// XOR encode
+	xorTransform(buf[16:], xorDeriveKey(key[:], 4))
+	reverseBytes(buf[16:])
+	xorTransform(buf[16:], xorClientKey)
+	// Encrypt and encode
+	output = base64.StdEncoding.EncodeToString(rsaEncrypt(buf))
+	return
+}
+
+func Decode(input string, key Key) (output []byte, err error) {
+	// Base64 decode
+	data, err := base64.StdEncoding.DecodeString(input)
+	if err != nil {
+		return
+	}
+	// RSA decrypt
+	data = rsaDecrypt(data)
+	// XOR decode
+	output = make([]byte, len(data)-16)
+	copy(output, data[16:])
+	xorTransform(output, xorDeriveKey(data[:16], 12))
+	reverseBytes(output)
+	xorTransform(output, xorDeriveKey(key[:], 4))
+	return
+}
diff --git a/pkg/crypto/m115/rsa.go b/pkg/crypto/m115/rsa.go
new file mode 100644
index 0000000..3c4c7f0
--- /dev/null
+++ b/pkg/crypto/m115/rsa.go
@@ -0,0 +1,87 @@
+package m115
+
+import (
+	"bytes"
+	"crypto/rand"
+	"io"
+	"math/big"
+)
+
+var (
+	_N, _ = big.NewInt(0).SetString(
+		"8686980c0f5a24c4b9d43020cd2c22703ff3f450756529058b1cf88f09b86021"+
+			"36477198a6e2683149659bd122c33592fdb5ad47944ad1ea4d36c6b172aad633"+
+			"8c3bb6ac6227502d010993ac967d1aef00f0c8e038de2e4d3bc2ec368af2e9f1"+
+			"0a6f1eda4f7262f136420c07c331b871bf139f74f3010e3c4fe57df3afb71683", 16)
+	_E, _ = big.NewInt(0).SetString("10001", 16)
+
+	_KeyLength = _N.BitLen() / 8
+)
+
+func rsaEncrypt(input []byte) []byte {
+	buf := &bytes.Buffer{}
+	for remainSize := len(input); remainSize > 0; {
+		sliceSize := _KeyLength - 11
+		if sliceSize > remainSize {
+			sliceSize = remainSize
+		}
+		rsaEncryptSlice(input[:sliceSize], buf)
+
+		input = input[sliceSize:]
+		remainSize -= sliceSize
+	}
+	return buf.Bytes()
+}
+
+func rsaEncryptSlice(input []byte, w io.Writer) {
+	// Padding
+	padSize := _KeyLength - len(input) - 3
+	padData := make([]byte, padSize)
+	_, _ = rand.Read(padData)
+	// Prepare message
+	buf := make([]byte, _KeyLength)
+	buf[0], buf[1] = 0, 2
+	for i, b := range padData {
+		buf[2+i] = b%0xff + 0x01
+	}
+	buf[padSize+2] = 0
+	copy(buf[padSize+3:], input)
+	msg := big.NewInt(0).SetBytes(buf)
+	// RSA Encrypt
+	ret := big.NewInt(0).Exp(msg, _E, _N).Bytes()
+	// Fill zeros at beginning
+	if fillSize := _KeyLength - len(ret); fillSize > 0 {
+		zeros := make([]byte, fillSize)
+		_, _ = w.Write(zeros)
+	}
+	_, _ = w.Write(ret)
+}
+
+func rsaDecrypt(input []byte) []byte {
+	buf := &bytes.Buffer{}
+	for remainSize := len(input); remainSize > 0; {
+		sliceSize := _KeyLength
+		if sliceSize > remainSize {
+			sliceSize = remainSize
+		}
+		rsaDecryptSlice(input[:sliceSize], buf)
+
+		input = input[sliceSize:]
+		remainSize -= sliceSize
+	}
+	return buf.Bytes()
+}
+
+func rsaDecryptSlice(input []byte, w io.Writer) {
+	// RSA Decrypt
+	msg := big.NewInt(0).SetBytes(input)
+	ret := big.NewInt(0).Exp(msg, _E, _N).Bytes()
+	// Un-padding
+	for i, b := range ret {
+		// Find the beginning of plaintext
+		if b == 0 && i != 0 {
+			_, _ = w.Write(ret[i+1:])
+			break
+		}
+	}
+}
diff --git a/pkg/crypto/m115/util.go b/pkg/crypto/m115/util.go
new file mode 100644
index 0000000..3d0af8d
--- /dev/null
+++ b/pkg/crypto/m115/util.go
@@ -0,0 +1,8 @@
+package m115
+
+// reverseBytes reverses data in place.
+func reverseBytes(data []byte) {
+	for i, j := 0, len(data)-1; i < j; i, j = i+1, j-1 {
+		data[i], data[j] = data[j], data[i]
+	}
+}
diff --git a/pkg/crypto/m115/xor.go b/pkg/crypto/m115/xor.go
new file mode 100644
index 0000000..daed2df
--- /dev/null
+++ b/pkg/crypto/m115/xor.go
@@ -0,0 +1,52 @@
+package m115
+
+var (
+	// Pre-calculated key data
+	xorKeySeed = []byte{
+		0xf0, 0xe5, 0x69, 0xae, 0xbf, 0xdc, 0xbf, 0x8a,
+		0x1a, 0x45, 0xe8, 0xbe, 0x7d, 0xa6, 0x73, 0xb8,
+		0xde, 0x8f, 0xe7, 0xc4, 0x45, 0xda, 0x86, 0xc4,
+		0x9b, 0x64, 0x8b, 0x14, 0x6a, 0xb4, 0xf1, 0xaa,
+		0x38, 0x01, 0x35, 0x9e, 0x26, 0x69, 0x2c, 0x86,
+		0x00, 0x6b, 0x4f, 0xa5, 0x36, 0x34, 0x62, 0xa6,
+		0x2a, 0x96, 0x68, 0x18, 0xf2, 0x4a, 0xfd, 0xbd,
+		0x6b, 0x97, 0x8f, 0x4d, 0x8f, 0x89, 0x13, 0xb7,
+		0x6c, 0x8e, 0x93, 0xed, 0x0e, 0x0d, 0x48, 0x3e,
+		0xd7, 0x2f, 0x88, 0xd8, 0xfe, 0xfe, 0x7e, 0x86,
+		0x50, 0x95, 0x4f, 0xd1, 0xeb, 0x83, 0x26, 0x34,
+		0xdb, 0x66, 0x7b, 0x9c, 0x7e, 0x9d, 0x7a, 0x81,
+		0x32, 0xea, 0xb6, 0x33, 0xde, 0x3a, 0xa9, 0x59,
+		0x34, 0x66, 0x3b, 0xaa, 0xba, 0x81, 0x60, 0x48,
+		0xb9, 0xd5, 0x81, 0x9c, 0xf8, 0x6c, 0x84, 0x77,
+		0xff, 0x54, 0x78, 0x26, 0x5f, 0xbe, 0xe8, 0x1e,
+		0x36, 0x9f, 0x34, 0x80, 0x5c, 0x45, 0x2c, 0x9b,
+		0x76, 0xd5, 0x1b, 0x8f, 0xcc, 0xc3, 0xb8, 0xf5,
+	}
+
+	xorClientKey = []byte{
+		0x78, 0x06, 0xad, 0x4c, 0x33, 0x86, 0x5d, 0x18,
+		0x4c, 0x01, 0x3f, 0x46,
+	}
+)
+
+func xorDeriveKey(seed []byte, size int) []byte {
+	key := make([]byte, size)
+	for i := 0; i < size; i++ {
+		key[i] = (seed[i] + xorKeySeed[size*i]) & 0xff
+		key[i] ^= xorKeySeed[size*(size-i-1)]
+	}
+	return key
+}
+
+func xorTransform(data []byte, key []byte) {
+	dataSize, keySize := len(data), len(key)
+	mod := dataSize % 4
+	if mod > 0 {
+		for i := 0; i < mod; i++ {
+			data[i] ^= key[i%keySize]
+		}
+	}
+	for i := mod; i < dataSize; i++ {
+		data[i] ^= key[(i-mod)%keySize]
+	}
+}
diff --git a/pkg/driver/download.go b/pkg/driver/download.go
index 262a9f4..a5cfc50 100644
--- a/pkg/driver/download.go
+++ b/pkg/driver/download.go
@@ -6,7 +6,7 @@ import (
 	"io"
 	"net/http"
 
-	crypto "github.com/gaoyb7/115drive-webdav/115"
+	crypto "github.com/SheltonZhu/115driver/pkg/crypto/m115"
 	"github.com/go-resty/resty/v2"
 )
 
diff --git a/pkg/driver/offline.go b/pkg/driver/offline.go
index 60b17dd..bc42818 100644
--- a/pkg/driver/offline.go
+++ b/pkg/driver/offline.go
@@ -6,7 +6,7 @@ import (
 	"net/url"
 	"strconv"
 
-	crypto "github.com/gaoyb7/115drive-webdav/115"
+	crypto "github.com/SheltonZhu/115driver/pkg/crypto/m115"
 )
 
 // OfflineTask describe an offline downloading task.