无法从自行生成的 PKCS8 获取私钥。
我已经生成了私钥：
KeyPair pair = getKeyPair();
StringWriter privateWriter = new StringWriter();
try (JcaPEMWriter w = new JcaPEMWriter(privateWriter)) {
w.writeObject(new JcaPKCS8Generator(pair.getPrivate(), null));
} catch (IOException e) {
throw new RuntimeException(e);
}
现在我正在尝试从字符串中获取私钥。
private PrivateKey getPrivateKeyFromString(String key) {
key = """
-----BEGIN PRIVATE KEY-----
MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCoY5d/IeuUhznJ
HIxqSibQks5Hdm/2nd5HWvD/Jcdcd6wfjHuoUZyFarhm5sWR6aBj1ZAcj7o0hXPS
gRA64ka/eA09YcLe0FunKyUUwXihize3VbDDOrTqRgLdPdnbtcwFIYDok40IIUlK
...
x08Iqpel5FehCpIDAh/jqPNBfKLWV5TpRxvBDdrBAoGBALyv5VCiJjIUOgAsJ5cb
SwJLPGrlp7xSoe69TQ7Uc+GcvMwokP1hJCnaicKy/AyvQeBS5CQLu0nOfr0vy1mF
jAwpBvorgZ3HBlUYzIDyJKeep7Lj5nKHs5FicAOpTJCaKZAeruMW91Qh6KaMZwYb
hMg1M4O1HSDOsdDBg6wuoLqv
-----END PRIVATE KEY-----
""";
byte[] keyBytes = key.getBytes();
PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = null;
try {
keyFactory = KeyFactory.getInstance("RSA");
return keyFactory.generatePrivate(spec);
} catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
throw new RuntimeException(e);
}
}
运行 getPrivateKeyFromString gGetting 时出现异常：
java.security.InvalidKeyException: invalid key format
Topaco 的回答很有帮助。这段代码现在可以工作了。
private PrivateKey getPrivateKeyFromString(String key) {
key = """
-----BEGIN PRIVATE KEY-----
MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCoY5d/IeuUhznJ
HIxqSibQks5Hdm/2nd5HWvD/Jcdcd6wfjHuoUZyFarhm5sWR6aBj1ZAcj7o0hXPS
...
jAwpBvorgZ3HBlUYzIDyJKeep7Lj5nKHs5FicAOpTJCaKZAeruMW91Qh6KaMZwYb
hMg1M4O1HSDOsdDBg6wuoLqv
-----END PRIVATE KEY-----
""";
key = key.replace("-----BEGIN PRIVATE KEY-----", "")
.replace("-----END PRIVATE KEY-----", "")
.replaceAll("\n", "");
byte[] keyBytes = Base64.getDecoder().decode(key);
PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory;
try {
keyFactory = KeyFactory.getInstance("RSA");
return keyFactory.generatePrivate(spec);
} catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
throw new RuntimeException(e);
}
}
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