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feat: adds signing subcommands to updater
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| package pkg | ||
|
|
||
| import ( | ||
| "crypto" | ||
| "crypto/rand" | ||
| "crypto/rsa" | ||
| "crypto/sha256" | ||
| "crypto/x509" | ||
| "encoding/pem" | ||
| "fmt" | ||
| ) | ||
|
|
||
| // Sign signs a message using a private key. | ||
| func Sign(privateKey []byte, message string) ([]byte, error) { | ||
| block, _ := pem.Decode(privateKey) | ||
| if block == nil { | ||
| return nil, fmt.Errorf("failed to decode PEM block containing private key") | ||
| } | ||
|
|
||
| key, err := x509.ParsePKCS8PrivateKey(block.Bytes) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to parse private key: %v", err) | ||
| } | ||
|
|
||
| hasher := sha256.New() | ||
| hasher.Write([]byte(message)) | ||
| hashed := hasher.Sum(nil) | ||
|
|
||
| signature, err := rsa.SignPKCS1v15(rand.Reader, key.(*rsa.PrivateKey), crypto.SHA256, hashed) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to sign message: %v", err) | ||
| } | ||
|
|
||
| return signature, nil | ||
| } | ||
|
|
||
| // Verify verifies a message using a public key and a signature. | ||
| func Verify(publicKey []byte, message string, signature []byte) error { | ||
| block, _ := pem.Decode(publicKey) | ||
| if block == nil { | ||
| return fmt.Errorf("failed to decode PEM block containing public key") | ||
| } | ||
|
|
||
| key, err := x509.ParsePKIXPublicKey(block.Bytes) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to parse public key: %v", err) | ||
| } | ||
|
|
||
| hasher := sha256.New() | ||
| hasher.Write([]byte(message)) | ||
| hashed := hasher.Sum(nil) | ||
|
|
||
| err = rsa.VerifyPKCS1v15(key.(*rsa.PublicKey), crypto.SHA256, hashed, signature) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to verify signature: %v", err) | ||
| } | ||
|
|
||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| package pkg_test | ||
|
|
||
| import ( | ||
| "crypto/rand" | ||
| "crypto/rsa" | ||
| "crypto/x509" | ||
| "encoding/pem" | ||
|
|
||
| "github.com/input-output-hk/catalyst-ci/tools/updater/pkg" | ||
| . "github.com/onsi/ginkgo/v2" | ||
| . "github.com/onsi/gomega" | ||
| ) | ||
|
|
||
| var _ = Describe("Signing", func() { | ||
| var privKey []byte | ||
| var pubKey []byte | ||
|
|
||
| BeforeEach(func() { | ||
| privateKeyRaw, err := rsa.GenerateKey(rand.Reader, 2048) | ||
| Expect(err).ToNot(HaveOccurred()) | ||
|
|
||
| privateKeyDer, err := x509.MarshalPKCS8PrivateKey(privateKeyRaw) | ||
| Expect(err).ToNot(HaveOccurred()) | ||
| privateKeyBlock := &pem.Block{ | ||
| Type: "RSA PRIVATE KEY", | ||
| Bytes: privateKeyDer, | ||
| } | ||
| privKey = pem.EncodeToMemory(privateKeyBlock) | ||
|
|
||
| publicKey := &privateKeyRaw.PublicKey | ||
| publicKeyDer, err := x509.MarshalPKIXPublicKey(publicKey) | ||
| Expect(err).ToNot(HaveOccurred()) | ||
|
|
||
| publicKeyBlock := &pem.Block{ | ||
| Type: "PUBLIC KEY", | ||
| Bytes: publicKeyDer, | ||
| } | ||
| pubKey = pem.EncodeToMemory(publicKeyBlock) | ||
| }) | ||
|
|
||
| Describe("Sign", func() { | ||
| When("signing a message", func() { | ||
| When("The private key is valid", func() { | ||
| It("returns a signature", func() { | ||
| signature, err := pkg.Sign(privKey, "message") | ||
| Expect(err).ToNot(HaveOccurred()) | ||
| Expect(signature).ToNot(BeNil()) | ||
| }) | ||
| }) | ||
|
|
||
| When("The private key is invalid", func() { | ||
| It("returns an error", func() { | ||
| signature, err := pkg.Sign([]byte("invalid"), "message") | ||
| Expect(err).To(HaveOccurred()) | ||
| Expect(signature).To(BeNil()) | ||
| }) | ||
| }) | ||
| }) | ||
| }) | ||
|
|
||
| Describe("Verify", func() { | ||
| When("verifying a message", func() { | ||
| var message string | ||
| var signature []byte | ||
|
|
||
| BeforeEach(func() { | ||
| message = "message" | ||
|
|
||
| var err error | ||
| signature, err = pkg.Sign(privKey, message) | ||
| Expect(err).ToNot(HaveOccurred()) | ||
| }) | ||
|
|
||
| When("The public key and signature are valid", func() { | ||
| It("returns nil", func() { | ||
| err := pkg.Verify(pubKey, message, signature) | ||
| Expect(err).ToNot(HaveOccurred()) | ||
| }) | ||
| }) | ||
|
|
||
| When("The public key is invalid", func() { | ||
| It("returns an error", func() { | ||
| err := pkg.Verify([]byte("invalid"), message, signature) | ||
| Expect(err).To(HaveOccurred()) | ||
| }) | ||
| }) | ||
|
|
||
| When("The signature is invalid", func() { | ||
| It("returns an error", func() { | ||
| err := pkg.Verify(pubKey, message, []byte("invalid")) | ||
| Expect(err).To(HaveOccurred()) | ||
| }) | ||
| }) | ||
| }) | ||
| }) | ||
| }) |