[英]SHA1withRSA NoSuchAlgorithmException
您好我有以下 function 在我的应用程序中将字符串转换为 PrivateKey:
public static PrivateKey main() throws Exception {
// Read in the key into a String
StringBuilder pkcs8Lines = new StringBuilder();
BufferedReader rdr = new BufferedReader(new StringReader(PRIVATE_KEY));
String line;
while ((line = rdr.readLine()) != null) {
pkcs8Lines.append(line);
}
// Remove the "BEGIN" and "END" lines, as well as any whitespace
String pkcs8Pem = pkcs8Lines.toString();
pkcs8Pem = pkcs8Pem.replaceAll("\\n+","");
// Base64 decode the result
byte [] pkcs8EncodedBytes = Base64.decode(pkcs8Pem, Base64.DEFAULT);
// extract the private key
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(pkcs8EncodedBytes);
KeyFactory kf = KeyFactory.getInstance("SHA1WITHRSA");
PrivateKey privKey = kf.generatePrivate(keySpec);
return privKey;
}
我得到以下异常:
W/System.err: java.security.NoSuchAlgorithmException: SHA1withRSA KeyFactory not available W/System.err: at java.security.KeyFactory.(KeyFactory.java:161) at java.security.KeyFactory.getInstance(KeyFactory.java:195 )
所以我试图通过这段代码找到我可以使用的所有算法:
TreeSet<String> algorithms = new TreeSet<>();
for (Provider provider : Security.getProviders())
for (Provider.Service service : provider.getServices())
if (service.getType().equals("Signature"))
algorithms.add(service.getAlgorithm());
for (String algorithm : algorithms)
System.out.println(algorithm);
并且在响应中包含“SHA1withRSA”,您知道问题出在哪里吗?
SHA1withRSA 是一种签名类型,您可以在列表中看到它,因为您有
if (service.getType().equals("Signature"))
如果您将其编辑为
if (service.getType().equals("KeyFactory"))
你应该看到一个看起来像这样的列表
DSA
EC
RSA
RSASSA-PSS
X25519
X448
XDH
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