[英]RSA SHA256 signature generation and validation
我正在通過使用 BouncyCastle 並在 Go 中驗證簽名在 C# 中生成 RSA 簽名。
但出於某種原因,來自 C# 程序的簽名不會在 Go 中驗證。
細節:
公鑰/私鑰對是從Online RSA Key Generator生成的示例
哈希字節數組是一種使用 SHA265 生成並為簡單起見進行硬編碼的數組。
我為 BouncyCastle 嘗試了不同的簽名算法,使用了密鑰對,但似乎沒有任何效果。
我還驗證了簽名的字節數組在兩種語言之間匹配...
誰能告訴我我在這里缺少什么? 或者至少如何進一步調查?
我的 C# 代碼生成簽名
static void Main(string[] args)
{
byte[] hashBytes = new byte[32] { 152, 154, 255, 19, 168, 20, 167, 43, 232, 133, 146, 13, 183, 80, 186, 85, 180, 249, 95, 142, 234, 71, 93, 188, 29, 147, 220, 164, 248, 83, 196, 80 };
String privateKeyPemStr = @"-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----";
StringReader strReader = new StringReader(privateKeyPemStr);
PemReader pemReader = new PemReader(strReader);
AsymmetricCipherKeyPair keyPair = (AsymmetricCipherKeyPair)pemReader.ReadObject();
RsaKeyParameters privateKey = (RsaKeyParameters)keyPair.Private;
ISigner sig = SignerUtilities.GetSigner("SHA256withRSA");
sig.Init(true, privateKey);
sig.BlockUpdate(hashBytes, 0, hashBytes.Length);
byte[] signedBytes = sig.GenerateSignature();
var signedStr = Convert.ToBase64String(signedBytes);
Console.WriteLine(signedStr);
Console.ReadLine();
}
這是我驗證簽名的 Go 代碼。 我將 C# 代碼的結果復制到簽名變量中
func main() {
pubKeyStr := `-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCIw68jARnmvTh+xvMcv5iugtoH
Xt60NWEebfbghLTFuTlQvK0exY5hxnN/uD2UVc/S3QGnBQn0AfynhxlEZkedpYBb
5RWoVChGZMHu7hbZukMjByjxec0LjtuEQhY4m18XaVNmAQWD/EiROMGTghMwykkQ
+SBtx4Gl/O/BB6F4SQIDAQAB
-----END PUBLIC KEY-----`
pemBlockPub, _ := pem.Decode([]byte(pubKeyStr))
pub, _ := x509.ParsePKIXPublicKey(pemBlockPub.Bytes)
publicKey, _ := pub.(*rsa.PublicKey)
signatureStr := "YJxDTSMnFb4uh/orsUjHTHEsW1dkxuStsGP0PmjmObJhog/7OQfWgBcBZ58w0qWoknLGMVBBgZTgJtKq1ZSSTsx9uXhNKEhNEI3a+7ZhmPiHp6JRLbftsEoGKe7FKU8vXkp6Bo90qMOoJz54YI2xue8EA9b5PTgjkGbDbKdimF8="
signatureBytes, err := base64.StdEncoding.DecodeString(signatureStr)
hashBytes := [32]byte{152, 154, 255, 19, 168, 20, 167, 43, 232, 133, 146, 13, 183, 80, 186, 85, 180, 249, 95, 142, 234, 71, 93, 188, 29, 147, 220, 164, 248, 83, 196, 80}
err := rsa.VerifyPKCS1v15(publicKey, crypto.SHA256, hashBytes[:], signatureBytes)
if err != nil {
fmt.Printf("err: %v\n", err)
} else {
fmt.Printf("ok")
}
}
如果我在 C# 中使用以下代碼來驗證簽名,那就沒問題了。
String publicKeyPemStr = @"-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCIw68jARnmvTh+xvMcv5iugtoH
Xt60NWEebfbghLTFuTlQvK0exY5hxnN/uD2UVc/S3QGnBQn0AfynhxlEZkedpYBb
5RWoVChGZMHu7hbZukMjByjxec0LjtuEQhY4m18XaVNmAQWD/EiROMGTghMwykkQ
+SBtx4Gl/O/BB6F4SQIDAQAB
-----END PUBLIC KEY-----";
strReader = new StringReader(publicKeyPemStr);
pemReader = new PemReader(strReader);
RsaKeyParameters publicKey = (RsaKeyParameters)((AsymmetricKeyParameter)pemReader.ReadObject());
sig = SignerUtilities.GetSigner("SHA256withRSA");
sig.Init(false, publicKey);
sig.BlockUpdate(hashBytes, 0, hashBytes.Length);
if (sig.VerifySignature(signedBytes))
{
Console.WriteLine("Ok");
}
else
{
Console.WriteLine("NOK");
}
Console.ReadLine();
做了一些額外的測試,下面的 Go 代碼產生了與 C# 代碼完全不同的簽名字符串,盡管私鑰是相同的。 區別在哪里??
func main() {
privKeyStr := `-----BEGIN RSA PRIVATE KEY-----
MIICXAIBAAKBgQCIw68jARnmvTh+xvMcv5iugtoHXt60NWEebfbghLTFuTlQvK0e
xY5hxnN/uD2UVc/S3QGnBQn0AfynhxlEZkedpYBb5RWoVChGZMHu7hbZukMjByjx
ec0LjtuEQhY4m18XaVNmAQWD/EiROMGTghMwykkQ+SBtx4Gl/O/BB6F4SQIDAQAB
AoGAJLarODFee6OGG/paXvhMC2TTFLFyBVxjAuEwKdtWD9IGQdc0fhM4gqTccofJ
+B0FGiz7+ZMPtfImme5ZaRQv2wx7KOPbOdAyYxC7nLFCHYqDWZJ8/cCoS+hPJFd5
9OeGLGz3QKfEEPtYEAw4+E/UjilYAtRNREkISkYoB9Va8PUCQQDDHMPRSCfXbfZV
ufmlRZj2bH8sjVaSBbJIw+y9HKJ3ORRnKGjtIZ/+z70EwMwtbbQKnl71SruO5HB9
AUTtRka/AkEAs3GWQhplPbuH/fAlaEPy5GQilUNRt76NMsgtIFWPMXnt82cxTUUR
RIKwX7M96WBppPZ2Dy7uLrX8O+3fr6BK9wJATZ0lsBy57JKLiTJ/wmTbIjuqozhe
FZw6fYOiqt+3KSIFobuLcbkMgjp1AG0JS5D2K7swHvdpgMASl0dn+dMY1QJBAIPw
9QbN2bs2dJvnQ9oSfDoq1rLhuOheF/xK68Nmpc8/VBMwwTOLoVK6tWzoopFC7ur4
vX4Uh9WYwkpecab1OakCQD0SCs4zIggA/2NkUx8J5H07/drbm9uH+98EQUvzjTdz
qSW2jJPCA4GYYmtnnDRduukjmkJlbaaTdEH5YLCilF0=
-----END RSA PRIVATE KEY-----`
pemBlockPriv, _ := pem.Decode([]byte(privKeyStr))
privateKey, _ := x509.ParsePKCS1PrivateKey(pemBlockPriv.Bytes)
hashBytes := [32]byte{152, 154, 255, 19, 168, 20, 167, 43, 232, 133, 146, 13, 183, 80, 186, 85, 180, 249, 95, 142, 234, 71, 93, 188, 29, 147, 220, 164, 248, 83, 196, 80}
signatureByte, _ := rsa.SignPKCS1v15(rand.Reader, privateKey, crypto.SHA256, hashBytes[:])
signatureStr := base64.StdEncoding.EncodeToString(signatureByte)
fmt.Printf("%v\n", signatureStr)
}
當您使用 sig.GenerateSignature() 計算簽名時,BouncyCastle 將自動計算您的消息的 sha256。 您應該傳遞給 sig.BlockUpdate() 的是您希望 sha256 和 rsa 簽名的消息。 所以基本上你已經在你的消息中使用了兩次 sha256。
您可以在此處查看: https : //play.golang.org/p/mplEnmNbs9 。 在第 27 行,我在您的 hashBytes 上添加了另一個對 sha256 的調用,然后將其傳遞給 rsa.VerifyPKCS1v15() 並且工作正常。
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