Signatures

Signer
Signer signer(PrivateKey privateKey, String algorithm);
Returns a signer for the given private key and algorithm.
Usage Example
KeyStore keystore = keystore("classpath:keystore.p12", "password".toCharArray(), "PKCS12");
PrivateKey privateKey = privateKey(keystore, "alice", "password".toCharArray());
Signer signer = signer(privateKey, "SHA512withRSA");
byte[] signature = signer.sign("Hello".getBytes(UTF_8));
Signer by Key
SignerByKey signer(Map<String, PrivateKey> privateKeyMap, String algorithm)
Returns a signer that allows choosing the private key at runtime from a map of preconfigured keys.
Usage Example
KeyStore keystore = keystore("classpath:keystore.p12", "password".toCharArray(), "PKCS12");
​
PrivateKey aKey = privateKey(keystore, "alice", "password".toCharArray());
PrivateKey bKey = privateKey(keystore, "bob", "password".toCharArray());
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Map<String, PrivateKey> keys = Map.of("alice", aKey, "bob", bKey);
​
SignerByKey signer = signer(keys, "SHA512withRSA");
​
byte[] aSignature = signer.sign("alice", "Hello Bob".getBytes(UTF_8));
byte[] bSignature = signer.sign("bob", "Hello Alice".getBytes(UTF_8));
Encoding Signer
EncodingSigner signer(
    PrivateKey privateKey, 
    String algorithm, 
    Encoding encoding
);
Returns an encoding signer for the given key, algorithm and encoding. Assumes using the default JCA provider and UTF-8 as the plaintext string character set encoding.
Usage Example
KeyStore keystore = keystore("classpath:keystore.p12", "password".toCharArray(), "PKCS12");
PrivateKey privateKey = privateKey(keystore, "alice", "password".toCharArray());
EncodingSigner signer = signer(privateKey, "SHA512withRSA", BASE64);
String signature = signer.sign("Hello");
Encoding Signer with Custom Character Set
EncodingSigner signer(
    PrivateKey privateKey, 
    String algorithm, 
    Charset charset, 
    Encoding encoding
);
Same as encoding signer but allows specifying a custom character set for the plaintext messages.
Usage Example
KeyStore keystore = keystore("classpath:keystore.p12", "password".toCharArray(), "PKCS12");
PrivateKey privateKey = privateKey(keystore, "alice", "password".toCharArray());
EncodingSigner signer = signer(privateKey, "SHA512withRSA", ISO_8859_1, BASE64);
String signature = signer.sign("Hello");
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Last updated 2 months ago