去sha256原始數據，然后DSA簽名按十六進制打印符號結果使用 Java SHA256 和DSA 驗證第一步結果是否返回錯誤我知道沙256然后DSA是差異SHA256與DSA我怎么能在Go中生成一個符號，可以在Java中使用sha256與dsa進行驗證？Go是否有任何其他第三方庫支持？去package mainimport ( "crypto/dsa" "crypto/rand" "crypto/sha256" "encoding/asn1" "encoding/hex" "fmt" "golang.org/x/crypto/ssh" "math/big")func main() { pemData := []byte("-----BEGIN DSA PRIVATE KEY-----\n" + "MIIBvAIBAAKBgQD9f1OBHXUSKVLfSpwu7OTn9hG3UjzvRADDHj+AtlEmaUVdQCJR\n" + "+1k9jVj6v8X1ujD2y5tVbNeBO4AdNG/yZmC3a5lQpaSfn+gEexAiwk+7qdf+t8Yb\n" + "+DtX58aophUPBPuD9tPFHsMCNVQTWhaRMvZ1864rYdcq7/IiAxmd0UgBxwIVAJdg\n" + "UI8VIwvMspK5gqLrhAvwWBz1AoGBAPfhoIXWmz3ey7yrXDa4V7l5lK+7+jrqgvlX\n" + "TAs9B4JnUVlXjrrUWU/mcQcQgYC0SRZxI+hMKBYTt88JMozIpuE8FnqLVHyNKOCj\n" + "rh4rs6Z1kW6jfwv6ITVi8ftiegEkO8yk8b6oUZCJqIPf4VrlnwaSi2ZegHtVJWQB\n" + "TDv+z0kqAoGBAIb9o0KPsjAdzjK571e1Mx7ZhEyJGrcxHiN2sW8IztEbqrKKiMxp\n" + "NlTwm234uBdtzVHE3uDWZpfHPMIRmwBjCYDFRowWWVRdhdFXZlpCyp1gMWqJ11dh\n" + "3FI3+O43DevRSyyuLRVCNQ1J3iVgwY5ndRpZU7n6y8DPH4/4EBT7KvnVAhR4Vwun\n" + "Fhu/+4AGaVeMEa814I3dqg==\n" + "-----END DSA PRIVATE KEY-----") p, _ := ssh.ParseRawPrivateKey(pemData) pp := p.(*dsa.PrivateKey) hashed := []byte{1} sha256 := sha256.New() sha256.Write(hashed) hashed = sha256.Sum(nil) r, s, _ := dsa.Sign(rand.Reader, pp, hashed) type dsaSignature struct { R, S *big.Int } var ss dsaSignature ss.S = s ss.R = r signatureBytes, _ := asn1.Marshal(ss) fmt.Println(hex.EncodeToString(signatureBytes))}
2 回答
慕妹3242003
TA貢獻1824條經驗 獲得超6個贊
如果發生這種情況，請遵循 FIPS186-4 第 4.6 節和第 4.7 節
hashed := []byte{1}
pemData, _ := ioutil.ReadFile("config/secure/private.key")
p, err := ssh.ParseRawPrivateKey(pemData)
pp, ok := p.(*dsa.PrivateKey)
h := sha256.New()
h.Write(hashed)
hashed := h.Sum(nil)
if pp.Q.BitLen()/8 < len(hashed) {
hashed = hashed[0 : pp.Q.BitLen()/8]
}
r, s, _ := dsa.Sign(rand.Reader, pp, hashed)
var ss dsaSignature
ss.S = s
ss.R = r
hashed, _ = asn1.Marshal(ss)
神不在的星期二
TA貢獻1963條經驗 獲得超6個贊
我在爪哇中發現
package sun.security.provider;
private BigInteger generateS(BigInteger var1, BigInteger var2, BigInteger var3, BigInteger var4) throws SignatureException {
byte[] var5;
try {
var5 = this.md.digest();
} catch (RuntimeException var9) {
throw new SignatureException(var9.getMessage());
}
// this line split the hash256 redsult
int var6 = var2.bitLength() / 8;
if (var6 < var5.length) {
var5 = Arrays.copyOfRange(var5, 0, var6);
}
BigInteger var7 = new BigInteger(1, var5);
BigInteger var8 = var4.modInverse(var2);
return var1.multiply(var3).add(var7).multiply(var8).mod(var2);
}
你可以在戈朗使用
hashed := []byte{1}
sha256 := sha2562.New()
sha256.Write(hashed)
hashed = sha256.Sum(nil)
// you must split it
hashed = hashed[0:20]
原因是sha256結果在java中分裂，但glang沒有分裂
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