commit 8f308da12b6443f957888adae7c725b47dc75597 Author: Wayne Hsu Date: Wed Jul 5 00:14:16 2023 +0800 init diff --git a/aaa b/aaa new file mode 100644 index 0000000..e69de29 diff --git a/common/aes.go b/common/aes.go new file mode 100644 index 0000000..2aabe32 --- /dev/null +++ b/common/aes.go @@ -0,0 +1,72 @@ +package common + +import ( + "bytes" + "crypto/aes" + "crypto/cipher" + "encoding/base64" +) + +type Aes struct { + key []byte + iv []byte + method string +} + +// NewAes creates a new Aes instance with the given configuration. +func NewAes(key, iv, method string) *Aes { + return &Aes{ + key: []byte(key), + iv: []byte(iv), + method: method, + } +} + +// Encrypt encrypts the data using AES encryption. +func (a *Aes) Encrypt(data string) (string, error) { + block, err := aes.NewCipher(a.key) + + if err != nil { + return "", err + } + encrypter := cipher.NewCBCEncrypter(block, a.iv) + paddedData := pkcs7Pad([]byte(data), aes.BlockSize) + encrypted := make([]byte, len(paddedData)) + encrypter.CryptBlocks(encrypted, paddedData) + + return base64.StdEncoding.EncodeToString(encrypted), nil +} + +// Decrypt decrypts the data using AES decryption. +func (a *Aes) Decrypt(data string) (string, error) { + block, err := aes.NewCipher(a.key) + if err != nil { + return "", err + } + + decrypter := cipher.NewCBCDecrypter(block, a.iv) + encrypted, err := base64.StdEncoding.DecodeString(data) + if err != nil { + return "", err + } + + decrypted := make([]byte, len(encrypted)) + decrypter.CryptBlocks(decrypted, encrypted) + decrypted = pkcs7Unpad(decrypted) + + return string(decrypted), nil +} + +// pkcs7Pad pads the given data according to PKCS7 padding standard. +func pkcs7Pad(data []byte, blockSize int) []byte { + padding := blockSize - len(data)%blockSize + padded := append(data, bytes.Repeat([]byte{byte(padding)}, padding)...) + return padded +} + +// pkcs7Unpad removes PKCS7 padding from the given data. +func pkcs7Unpad(data []byte) []byte { + length := len(data) + unpadding := int(data[length-1]) + return data[:length-unpadding] +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..5d0aade --- /dev/null +++ b/go.mod @@ -0,0 +1,40 @@ +module ascend/nfccard + +go 1.19 + +require ( + github.com/ebfe/scard v0.0.0-20230420082256-7db3f9b7c8a7 + github.com/gin-gonic/gin v1.9.1 +) + +require ( + github.com/bytedance/sonic v1.9.1 // indirect + github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect + github.com/gabriel-vasile/mimetype v1.4.2 // indirect + github.com/gin-contrib/cors v1.4.0 // indirect + github.com/gin-contrib/sse v0.1.0 // indirect + github.com/go-playground/locales v0.14.1 // indirect + github.com/go-playground/universal-translator v0.18.1 // indirect + github.com/go-playground/validator/v10 v10.14.0 // indirect + github.com/goccy/go-json v0.10.2 // indirect + github.com/howeyc/fsnotify v0.9.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/klauspost/cpuid/v2 v2.2.4 // indirect + github.com/leodido/go-urn v1.2.4 // indirect + github.com/mattn/go-colorable v0.1.13 // indirect + github.com/mattn/go-isatty v0.0.19 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/pelletier/go-toml/v2 v2.0.8 // indirect + github.com/pilu/config v0.0.0-20131214182432-3eb99e6c0b9a // indirect + github.com/pilu/fresh v0.0.0-20190826141211-0fa698148017 // indirect + github.com/twitchyliquid64/golang-asm v0.15.1 // indirect + github.com/ugorji/go/codec v1.2.11 // indirect + golang.org/x/arch v0.3.0 // indirect + golang.org/x/crypto v0.9.0 // indirect + golang.org/x/net v0.10.0 // indirect + golang.org/x/sys v0.8.0 // indirect + golang.org/x/text v0.9.0 // indirect + google.golang.org/protobuf v1.30.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..1a08d95 --- /dev/null +++ b/go.sum @@ -0,0 +1,138 @@ 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h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4= diff --git a/main.go b/main.go new file mode 100644 index 0000000..f8b1cdb --- /dev/null +++ b/main.go @@ -0,0 +1,62 @@ +package main + +import ( + "ascend/nfccard/nfc" + "fmt" + "log" + + "github.com/gin-contrib/cors" + "github.com/gin-gonic/gin" +) + +func main() { + gin.SetMode(gin.ReleaseMode) + + r := gin.Default() + corsConfig := cors.DefaultConfig() + corsConfig.AllowAllOrigins = true + r.Use(cors.New(corsConfig)) + + r.GET("/getnfcid", getNfcCidHandler) + r.POST("/writenfc", writeNfcHandler) + + if err := r.Run(":8088"); err != nil { + log.Fatal(err) + } +} + +func getNfcCidHandler(c *gin.Context) { + response, err := nfc.GetNfcId() + if err != nil { + c.JSON(200, gin.H{ + "code": 500, + "error": err.Error(), + }) + return + } + + c.JSON(200, gin.H{ + "code": 200, + "sid": response, + }) +} + +func writeNfcHandler(c *gin.Context) { + //取得POST过来的数据 + data := c.PostForm("data") + fmt.Println("data", data) + + _, err := nfc.WriteNfcCard(data) + if err != nil { + c.JSON(200, gin.H{ + "code": 500, + "error": err.Error(), + }) + return + } + + c.JSON(200, gin.H{ + "code": 200, + "msg": "寫入成功", + }) +} diff --git a/makenfc.exe b/makenfc.exe new file mode 100644 index 0000000..8cc4050 Binary files /dev/null and b/makenfc.exe differ diff --git a/nfc/nfc.go b/nfc/nfc.go new file mode 100644 index 0000000..f006c46 --- /dev/null +++ b/nfc/nfc.go @@ -0,0 +1,205 @@ +package nfc + +import ( + "errors" + "fmt" + "os" + "strings" + + "github.com/ebfe/scard" +) + +var ctx *scard.Context +var readers []string + +func die(err error) { + fmt.Println(err) + os.Exit(1) +} + +func initReader() error { + var err error + // Establish a context + ctx, err = scard.EstablishContext() + if err != nil { + return err + } + + // List available readers + readers, err = ctx.ListReaders() + if err != nil { + return errors.New("讀卡機未連接") + } + + fmt.Printf("Found %d readers:\n", len(readers)) + for i, reader := range readers { + fmt.Printf("[%d] %s\n", i, reader) + } + return nil +} + +func GetNfcId() (string, error) { + err := initReader() + if err != nil { + return "", err + } + + if len(readers) > 0 { + //Connect to card + fmt.Println("Connecting to card in ", readers[0]) + + card, err := ctx.Connect(readers[0], scard.ShareExclusive, scard.ProtocolAny) + if err != nil { + return "", errors.New("請將卡片放置讀卡機上") + } + defer card.Disconnect(scard.ResetCard) + + fmt.Println("Card status:") + status, err := card.Status() + if err != nil { + return "", err + } + + fmt.Printf("\treader: %s\n\tstate: %x\n\tactive protocol: %x\n\tatr: % x\n", + status.Reader, status.State, status.ActiveProtocol, status.Atr) + + apdu := []byte{0xFF, 0xCA, 0x00, 0x00, 0x00} + rsp, err := card.Transmit(apdu) + if err != nil { + return "", err + } + + // Parse UID from response + if len(rsp) >= 3 && rsp[len(rsp)-2] == 0x90 && rsp[len(rsp)-1] == 0x00 { + uid := rsp[:len(rsp)-2] + //將uid reverse + reverseBytes(uid) + return strings.ToUpper(fmt.Sprintf("%x", uid)), nil + } + + return "NFC ID", nil + } + + return "", fmt.Errorf("No NFC reader found") +} + +func WriteNfcCard(data string) (string, error) { + err := initReader() + if err != nil { + return "", err + } + + if len(readers) > 0 { + // Connect to card + fmt.Println("Connecting to card in ", readers[0]) + card, err := ctx.Connect(readers[0], scard.ShareExclusive, scard.ProtocolAny) + + if err != nil { + return "", err + } + defer card.Disconnect(scard.ResetCard) + + fmt.Println("Card status:") + status, err := card.Status() + if err != nil { + return "", err + } + + fmt.Printf("\treader: %s\n\tstate: %x\n\tactive protocol: %x\n\tatr: % x\n", + status.Reader, status.State, status.ActiveProtocol, status.Atr) + + url := []byte(data) + + ndef := []byte{ + 0x03, byte(len(url) + 5), 0xd1, 0x01, + byte(len(url) + 1), 0x55, 0x04, + } + + //將url加入ndef,最後以0xef結尾 + ndef = append(ndef, url...) + ndef = append(ndef, 0xfe) + // for _, b := range ndef { + // fmt.Printf("%02x ", b) + // } + // fmt.Println() + + //將ndef 4bytes一組 + groupSize := 4 + ndefSize := len(ndef) + groupCount := ndefSize / groupSize + if ndefSize%groupSize != 0 { + groupCount++ + } + + //將ndef分組 + groups := make([][4]byte, groupCount) + for i := 0; i < groupCount; i++ { + start := i * groupSize + end := start + groupSize + if end > ndefSize { + end = ndefSize + } + copy(groups[i][:], ndef[start:end]) + } + + //將ndef分組後的資料寫入卡片 + for i, group := range groups { + + var cmd = []byte{ + 0xFF, 0xD6, + 0x00, + byte(4 + i), + 0x04, + } + + cmd = append(cmd, group[:]...) + + fmt.Println(cmd) + fmt.Println("Transmit:") + fmt.Printf("\tc-apdu: % x\n", cmd) + rsp, err := card.Transmit(cmd) + if err != nil { + return "", err + } + fmt.Printf("\tr-apdu: % x\n", rsp) + } + + apdu := []byte{0xFF, 0x00, 0x52, 0xFF, 0xFF} + rsp, err := card.Transmit(apdu) + if err != nil { + return "", err + } + fmt.Println() + fmt.Printf("\tr-apdu: % x\n", rsp) + fmt.Println("Done") + } + + return "", nil +} + +func waitUntilCardPresent() (int, error) { + rs := make([]scard.ReaderState, len(readers)) + for i := range rs { + rs[i].Reader = readers[i] + rs[i].CurrentState = scard.StateUnaware + } + + for { + for i := range rs { + if rs[i].EventState&scard.StatePresent != 0 { + return i, nil + } + rs[i].CurrentState = rs[i].EventState + } + err := ctx.GetStatusChange(rs, -1) + if err != nil { + return -1, err + } + } +} + +func reverseBytes(slice []byte) { + for i, j := 0, len(slice)-1; i < j; i, j = i+1, j-1 { + slice[i], slice[j] = slice[j], slice[i] + } +} diff --git a/tmp/runner-build.exe b/tmp/runner-build.exe new file mode 100644 index 0000000..02b9e61 Binary files /dev/null and b/tmp/runner-build.exe differ diff --git a/tmp/runner-build.exe~ b/tmp/runner-build.exe~ new file mode 100644 index 0000000..7c00fd4 Binary files /dev/null and b/tmp/runner-build.exe~ differ