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This commit is contained in:
Peter Rounce 2023-09-16 12:27:02 +01:00
parent 2da9275c9a
commit 3a1262db82
2 changed files with 44 additions and 44 deletions
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cli/cli
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cli/main.go
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@ -1,10 +1,10 @@
package main
import (
"os"
"fmt"
"encoding/hex"
"encoding/hex"
"fmt"
"github.com/boltcard/boltcard/crypto"
"os"
)
// inspired by parse_request() in lnurlw_request.go
@ -40,50 +40,50 @@ func check_cmac(uid []byte, ctr []byte, k2_cmac_key []byte, cmac []byte) (bool,
func main() {
fmt.Println("-- bolt card crypto test vectors --")
fmt.Println()
fmt.Println("-- bolt card crypto test vectors --")
fmt.Println()
args := os.Args[1:]
args := os.Args[1:]
if(len(args) != 4) {
fmt.Println("error: should have arguments for: p c aes_decrypt_key aes_cmac_key")
os.Exit(1)
}
if len(args) != 4 {
fmt.Println("error: should have arguments for: p c aes_decrypt_key aes_cmac_key")
os.Exit(1)
}
// get from args
p_hex := args[0]
c_hex := args[1]
aes_decrypt_key_hex := args[2]
aes_cmac_key_hex := args[3]
// get from args
p_hex := args[0]
c_hex := args[1]
aes_decrypt_key_hex := args[2]
aes_cmac_key_hex := args[3]
fmt.Println("p = ", p_hex)
fmt.Println("c = ", c_hex)
fmt.Println("aes_decrypt_key = ", aes_decrypt_key_hex)
fmt.Println("aes_cmac_key = ", aes_cmac_key_hex)
fmt.Println()
fmt.Println("p = ", p_hex)
fmt.Println("c = ", c_hex)
fmt.Println("aes_decrypt_key = ", aes_decrypt_key_hex)
fmt.Println("aes_cmac_key = ", aes_cmac_key_hex)
fmt.Println()
p, err := hex.DecodeString(p_hex)
p, err := hex.DecodeString(p_hex)
if err != nil {
fmt.Println("ERROR: p not valid hex", err)
os.Exit(1)
fmt.Println("ERROR: p not valid hex", err)
os.Exit(1)
}
c, err := hex.DecodeString(c_hex)
if err != nil {
fmt.Println("ERROR: c not valid hex", err)
os.Exit(1)
fmt.Println("ERROR: c not valid hex", err)
os.Exit(1)
}
if len(p) != 16 {
fmt.Println("ERROR: p length not valid")
os.Exit(1)
fmt.Println("ERROR: p length not valid")
os.Exit(1)
}
if len(c) != 8 {
fmt.Println("ERROR: c length not valid")
os.Exit(1)
fmt.Println("ERROR: c length not valid")
os.Exit(1)
}
// decrypt p with aes_decrypt_key
@ -91,20 +91,20 @@ func main() {
aes_decrypt_key, err := hex.DecodeString(aes_decrypt_key_hex)
if err != nil {
fmt.Println("ERROR: DecodeString() returned an error", err)
os.Exit(1)
fmt.Println("ERROR: DecodeString() returned an error", err)
os.Exit(1)
}
dec_p, err := crypto.Aes_decrypt(aes_decrypt_key, p)
if err != nil {
fmt.Println("ERROR: Aes_decrypt() returned an error", err)
os.Exit(1)
fmt.Println("ERROR: Aes_decrypt() returned an error", err)
os.Exit(1)
}
if dec_p[0] != 0xC7 {
fmt.Println("ERROR: decrypted data does not start with 0xC7 so is invalid")
os.Exit(1)
fmt.Println("ERROR: decrypted data does not start with 0xC7 so is invalid")
os.Exit(1)
}
uid := dec_p[1:8]
@ -115,29 +115,29 @@ func main() {
uid_str := hex.EncodeToString(uid)
ctr_str := hex.EncodeToString(ctr)
fmt.Println("decrypted card data : uid", uid_str, ", ctr", ctr_str)
fmt.Println("decrypted card data : uid", uid_str, ", ctr", ctr_str)
// check cmac
aes_cmac_key, err := hex.DecodeString(aes_cmac_key_hex)
if err != nil {
fmt.Println("ERROR: aes_cmac_key is not valid hex", err)
os.Exit(1)
fmt.Println("ERROR: aes_cmac_key is not valid hex", err)
os.Exit(1)
}
cmac_valid, err := check_cmac(uid, ctr, aes_cmac_key, c)
if err != nil {
fmt.Println("ERROR: check_cmac() returned an error", err)
os.Exit(1)
fmt.Println("ERROR: check_cmac() returned an error", err)
os.Exit(1)
}
if cmac_valid == false {
fmt.Println("ERROR: cmac incorrect")
os.Exit(1)
fmt.Println("ERROR: cmac incorrect")
os.Exit(1)
}
fmt.Println("cmac validates ok")
os.Exit(0)
fmt.Println("cmac validates ok")
os.Exit(0)
}