Mixing
Convert SubjectPublicKeyInfo to Java PublicKey
My app is using bouncycastle to decode certificates deeper then java native X509Certificate provide, actualy i have bouncy castle certificates ( org.bouncycastle.asn1.x509.Certificate).
My question is how to secure convert org.bouncycastle.asn1.x509.SubjectPublicKeyInfo to a java.security.Publickey. ?
i'd like to use the standard java signature method java.security.Signature instead BouncyCastle alternatives.
Signature sig = Signature.getInstance(signatureAlgorithm.getAlgorithm().getId());
sig.initVerify(getPublicKey());
sig.update(content);
return sig.verify(signature);
java cryptography bouncycastle
asked Nov 20 '18 at 17:53
argothargoth
170112
add a comment |
My app is using bouncycastle to decode certificates deeper then java native X509Certificate provide, actualy i have bouncy castle certificates ( org.bouncycastle.asn1.x509.Certificate).
My question is how to secure convert org.bouncycastle.asn1.x509.SubjectPublicKeyInfo to a java.security.Publickey. ?
i'd like to use the standard java signature method java.security.Signature instead BouncyCastle alternatives.
Signature sig = Signature.getInstance(signatureAlgorithm.getAlgorithm().getId());
sig.initVerify(getPublicKey());
sig.update(content);
return sig.verify(signature);
java cryptography bouncycastle
asked Nov 20 '18 at 17:53
argothargoth
170112
add a comment |
My app is using bouncycastle to decode certificates deeper then java native X509Certificate provide, actualy i have bouncy castle certificates ( org.bouncycastle.asn1.x509.Certificate).
My question is how to secure convert org.bouncycastle.asn1.x509.SubjectPublicKeyInfo to a java.security.Publickey. ?
i'd like to use the standard java signature method java.security.Signature instead BouncyCastle alternatives.
Signature sig = Signature.getInstance(signatureAlgorithm.getAlgorithm().getId());
sig.initVerify(getPublicKey());
sig.update(content);
return sig.verify(signature);
java cryptography bouncycastle
asked Nov 20 '18 at 17:53
argothargoth
170112
My app is using bouncycastle to decode certificates deeper then java native X509Certificate provide, actualy i have bouncy castle certificates ( org.bouncycastle.asn1.x509.Certificate).
My question is how to secure convert org.bouncycastle.asn1.x509.SubjectPublicKeyInfo to a java.security.Publickey. ?
i'd like to use the standard java signature method java.security.Signature instead BouncyCastle alternatives.
Signature sig = Signature.getInstance(signatureAlgorithm.getAlgorithm().getId());
sig.initVerify(getPublicKey());
sig.update(content);
return sig.verify(signature);
java cryptography bouncycastle
java cryptography bouncycastle
asked Nov 20 '18 at 17:53
argothargoth
170112
asked Nov 20 '18 at 17:53
argothargoth
170112
edited Nov 20 '18 at 18:07
argoth
asked Nov 20 '18 at 17:53
argothargoth
170112
asked Nov 20 '18 at 17:53
argothargoth
170112
asked Nov 20 '18 at 17:53
argothargoth
170112
170112
add a comment |
add a comment |
1 Answer
1
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oldest
votes
A way to convert the key is using a RSAKeyParameter and RSAPublicKeySpec 'to rebuild' the key using the Modulus and Exponent.
RSAKeyParameters rsa = (RSAKeyParameters) PublicKeyFactory.createKey(certificate.getSubjectPublicKeyInfo());
RSAPublicKeySpec rsaSpec = new RSAPublicKeySpec(rsa.getModulus(), rsa.getExponent());
KeyFactory kf = KeyFactory.getInstance("RSA");
java.security.Publickey publicKey = kf.generatePublic(rsaSpec);
answered Nov 20 '18 at 18:07
argothargoth
170112
2
Encoding it to binary and then decoding it would be another option. SubjectPublicKeyInfo is the main encoding used forRSAPublicKey.getEncoded()andX509EncodedKeySpec. I prefer not to encode / decode though, so the above method should probably be prefered if encoding to binary is not required.
– Maarten Bodewes
Nov 20 '18 at 18:52
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
A way to convert the key is using a RSAKeyParameter and RSAPublicKeySpec 'to rebuild' the key using the Modulus and Exponent.
RSAKeyParameters rsa = (RSAKeyParameters) PublicKeyFactory.createKey(certificate.getSubjectPublicKeyInfo());
RSAPublicKeySpec rsaSpec = new RSAPublicKeySpec(rsa.getModulus(), rsa.getExponent());
KeyFactory kf = KeyFactory.getInstance("RSA");
java.security.Publickey publicKey = kf.generatePublic(rsaSpec);
answered Nov 20 '18 at 18:07
argothargoth
170112
2
Encoding it to binary and then decoding it would be another option. SubjectPublicKeyInfo is the main encoding used forRSAPublicKey.getEncoded()andX509EncodedKeySpec. I prefer not to encode / decode though, so the above method should probably be prefered if encoding to binary is not required.
– Maarten Bodewes
Nov 20 '18 at 18:52
add a comment |
A way to convert the key is using a RSAKeyParameter and RSAPublicKeySpec 'to rebuild' the key using the Modulus and Exponent.
RSAKeyParameters rsa = (RSAKeyParameters) PublicKeyFactory.createKey(certificate.getSubjectPublicKeyInfo());
RSAPublicKeySpec rsaSpec = new RSAPublicKeySpec(rsa.getModulus(), rsa.getExponent());
KeyFactory kf = KeyFactory.getInstance("RSA");
java.security.Publickey publicKey = kf.generatePublic(rsaSpec);
answered Nov 20 '18 at 18:07
argothargoth
170112
2
Encoding it to binary and then decoding it would be another option. SubjectPublicKeyInfo is the main encoding used forRSAPublicKey.getEncoded()andX509EncodedKeySpec. I prefer not to encode / decode though, so the above method should probably be prefered if encoding to binary is not required.
– Maarten Bodewes
Nov 20 '18 at 18:52
add a comment |
A way to convert the key is using a RSAKeyParameter and RSAPublicKeySpec 'to rebuild' the key using the Modulus and Exponent.
RSAKeyParameters rsa = (RSAKeyParameters) PublicKeyFactory.createKey(certificate.getSubjectPublicKeyInfo());
RSAPublicKeySpec rsaSpec = new RSAPublicKeySpec(rsa.getModulus(), rsa.getExponent());
KeyFactory kf = KeyFactory.getInstance("RSA");
java.security.Publickey publicKey = kf.generatePublic(rsaSpec);
answered Nov 20 '18 at 18:07
argothargoth
170112
A way to convert the key is using a RSAKeyParameter and RSAPublicKeySpec 'to rebuild' the key using the Modulus and Exponent.
RSAKeyParameters rsa = (RSAKeyParameters) PublicKeyFactory.createKey(certificate.getSubjectPublicKeyInfo());
RSAPublicKeySpec rsaSpec = new RSAPublicKeySpec(rsa.getModulus(), rsa.getExponent());
KeyFactory kf = KeyFactory.getInstance("RSA");
java.security.Publickey publicKey = kf.generatePublic(rsaSpec);
answered Nov 20 '18 at 18:07
argothargoth
170112
edited Nov 21 '18 at 8:32
answered Nov 20 '18 at 18:07
argothargoth
170112
answered Nov 20 '18 at 18:07
argothargoth
170112
answered Nov 20 '18 at 18:07
argothargoth
170112
170112
2
Encoding it to binary and then decoding it would be another option. SubjectPublicKeyInfo is the main encoding used forRSAPublicKey.getEncoded()andX509EncodedKeySpec. I prefer not to encode / decode though, so the above method should probably be prefered if encoding to binary is not required.
– Maarten Bodewes
Nov 20 '18 at 18:52
add a comment |
2
Encoding it to binary and then decoding it would be another option. SubjectPublicKeyInfo is the main encoding used forRSAPublicKey.getEncoded()andX509EncodedKeySpec. I prefer not to encode / decode though, so the above method should probably be prefered if encoding to binary is not required.
– Maarten Bodewes
Nov 20 '18 at 18:52
2
2
Encoding it to binary and then decoding it would be another option. SubjectPublicKeyInfo is the main encoding used for
RSAPublicKey.getEncoded() and X509EncodedKeySpec . I prefer not to encode / decode though, so the above method should probably be prefered if encoding to binary is not required.– Maarten Bodewes
Nov 20 '18 at 18:52
Encoding it to binary and then decoding it would be another option. SubjectPublicKeyInfo is the main encoding used for
RSAPublicKey.getEncoded() and X509EncodedKeySpec . I prefer not to encode / decode though, so the above method should probably be prefered if encoding to binary is not required.– Maarten Bodewes
Nov 20 '18 at 18:52
add a comment |
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