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Kotlin library for OpenPGP using bouncycastle

Getting Start

implementation 'moe.tlaster:kotlinpgp:<latest-version>'

KotlinPGP also support Android platform

Useage

Generate key pair

KotlinPGP.generateKeyPair(
    GenerateKeyPairParameter(
        name = keyName,
        email = keyEmail,
        password = keyPassword
    )
)

Return a public key and secret key pair

Encrypt message

Without signing

KotlinPGP.encrypt(EncryptParameter(
    message = contentToEncrypt,
    publicKey = publicKeys // A list of public key string
))

With signing

KotlinPGP.encrypt(EncryptParamete(
    message = contentToEncrypt,
    publicKey = publicKeys, // A list of public key string
    enableSignature = true,
    privateKey = keypair.secretKey, // A private key string
    password = keyPassword
))

Clear sign

KotlinPGP.encrypt(EncryptParameter(
    message = contentToEncrypt,
    publicKey = emptyList(),
    enableSignature = true,
    privateKey = keypair.secretKey, // A private key string
    password = keyPassword
))

Return a encrypted string

Decrypt

Decrypt unsigned data

KotlinPGP.decrypt(
    keypair.secretKey, // A private key string 
    keyPassword, 
    encryptedData
)

Decrypt signed data

KotlinPGP.decrypt(
    keypair.secretKey, // A private key string
    keyPassword, 
    signedEncryptedData
)

Decrypt clear signed data

KotlinPGP.decrypt(
    keypair.secretKey, // A private key string
    keyPassword, 
    clearSignedData
)

Return

data class DecryptResult(
    val result: String,// decrypted message
    val time: Date? = null, // message encrypted time (if possible)
    val hasSignature: Boolean = false,
    val signatureData: SignatureData,// signatureData can be used at verify
    val includedKeys: List<Long> = emptyList()
)

Verify

KotlinPGP.verify(
    signatureData, 
    publicKeys // A list of public key string
)

Return

data class VerifyResult(
    val verifyStatus: VerifyStatus, // Can be NO_SIGNATURE, SIGNATURE_BAD, SIGNATURE_OK, UNKNOWN_PUBLIC_KEY
    val publicKey: String = "", // If verify status is SIGNATURE_OK, will return the public key string provided by the parameter, otherwise will be empty
    val keyID: Long = 0 // Will be the key id in the signature
)

Helper extensions

PGPKeyRing.exportToString()

Export a key ring (public or secret) to string

License

The MIT License (MIT)

Copyright (c) 2019 Tlaster

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

kotlinpgp's People

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kotlinpgp's Issues

decrypt bytea string

can help me with the error below:

public key

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: BCPG v1.61
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=mOD+
-----END PGP PUBLIC KEY BLOCK-----

secret key

-----BEGIN PGP PRIVATE KEY BLOCK-----
Version: BCPG v1.61

lQPGBGCtACABCADIs8IRd05slPHXjcu3WGVY8dQwPHnkIyMgfnEsURRkIlbyXVVY
f2gH5yjndgfD9Sw3yWhVViZWozdmAT8UV2pHk4qCiCd83WiGC1pkOEw2GS4If3cT
EU7dJC5P/Py0FuVYrMdgZiGJGvbTIvHOsm14RnzxSWvzI8EwXVGdqczV7I5d4My3
PRuSE+PTaA7XE05efik1ovl7FSSU7BxvjsjnIn8nw+ddujOE94SA7cgmIWufHUFx
QqjsabT1NaVcEYw1qu9C1vtje+MUm0XyXVfYUpzPKypGu59DsT4UlFX29Q4wiIvB
YEGf2STDFOuKV5nlDxZqYe69CrW19ztuyYUrABEBAAH+CQMIy2lN4RTzJKaQMK2e
7efRsNiu7XGeZAvtrWMoLi3Gp2M9J5CeHRn0EjU4g/NQtv0BRaLMuTDh1+Z6kdZ9
PudGRLLnbWNGBzdi7YxUawNVcKxyCVmLol0qFW8ALrabP/q6ZHqsAhAc4rF+1j6p
p9VT1iwyIRYjcCMsO/aQfrxpPCf5kdDGeKagU/P6JjbSt5AfXkiRNeHlYBQt9ZJz
6SzoBkJkyapkDXAoOk8z16m6TbCs+SkwK9M9WWO0omR/md7woNLct1VR0jsCI1oE
C7fajwNWDGkfnzeiyyWMtEU+1pYu/ADoXlEfmTwkinamWfZJnJiFRFzLRi0msR/H
0fU+XWeJKhi/108COTG+lfL3DJDZ2FUeKr1nPanDxDnbnrPhN9yukyEluSngmNLs
HBCBYwDnVDTwTF2H1XG2eB0/fix0vemaWbS/F0J6Y03qKqPiqxiGtyv09lqmCiWh
HZsfTXTWvwP/s/NQoxG53Hsw6jtvsulWUPJ/3JhYD2tEkHaxssrpZfkW2DExHylt
JxzJWneCh5tfaxw0ivGDMRlQue29R7PfYKqsDX6B2Sq04hNtsBtwehuBQxz/QGe8
84wJ4W/PXlnyLDEHJ4Qq5HXXKehs4pXa6s++OJJb9OoM9ux3THVaNp2pP/IIGx6F
B0NPrUM0RcRkjpE/VFd/zM+ldTyMVva4Ugf5pOrL++Jnqw+2LEHfE3Xl810iIckH
hQMZg5eErkfy/w1LOW9/YllQtoKGdAd2zjD7x8Shb7WT+dH6pBe4bLisk6OV8+nf
y2zm8v+5+juDKNvLpnmBfNZWHdtHNr/4XsjMGDWlA8C3ToQ5vj9831JZ6RJ2dOEJ
MTAz8R8hJtSM/8TEjsnOl6vK8urzxtNhtzR5io3DzLEVdXsxyVnJ0fmNevbBlV1u
GxOLHMxhEvbbtB1jaGF2ZV90ZXN0ZSA8ZW1haWxAdGVzdGUuY29tPokBLgQTAQoA
GAUCYK0AJQIbAwQLCQgHBhUIAgkKCwIeAQAKCRAo1bxWc3xGP4ZPB/9wB/n+mHD+
VUdVihgDChliSh4V+gcFWNnwWE+NHcajBxHtDyHhA+ybwAVDhhU8FZOFKmu0WWJ7
0JGkBt9i8XRx4+Buk+W7DacEcwIR4a5uAz7w7QlXu87Qb+typFqR73gg2M6jgnEX
CHj0EpWv+fsILc1F/v9kCZzsnu7c6CQl30az9oU9R73UYjwE3p2vN8E5p+VzNnww
xYgahdnQNVcGF2sQJOVRq9xx/C3lnXLpwegfRVTv+D56OjnbTwT4XnsJpKZ+uXIj
T63pAWOUAaxdEorEErjZF/kdpba4HfrD+245EOaNZmiiRgrorKUx17TgRPvQkd/Y
fRD/ogWJk70unQPGBGCtACABCADA/GtcIOpPvfo3G/YvOrLMgaTv6QHWK3f4NucY
z8QARrMmLNxta0cQklAdsn51gthxehVPfRiPxLDV/PM+bOUumDqVDVmyHRmk//am
zYfA60gEPHDEOEM/TwvTLu78JcrAi7kf9fpwCeYzzfCdWneWilLxwOoWpLz11XC2
alHXZpIUnr2g/gDDWPqvI0STt0tHhdXnyY4Pkgk/TuJ7+mh3OMLjScfyN2VMHuuq
zY0KwiIYiohktYXXCt8gLF6ZGkyws74JEn0GTLg9o3zXNDacdetXJKTPHbioeC/w
uia3eYNpT9tz6+YhYuIvkaQSeFD+AH+2Zc3wcKeR4r/0nGqbABEBAAH+CQMIy2lN
4RTzJKaQ/Vtygp94BtEfzP0NozFGrhCh+7vz/7aWuPKaeE+D7INMsyIDXg/Ig4yD
TnmXAjVbbSIxHfkFukpPBPPDrkHvWs4ztvPnBJxE2swry8zspZharHx9DfIdguVq
uqBrbgT4i+/jzddNYKMFf0B4v+peTM72HTXKk5HjlyR/yiZ27ltcusYqRxvqBlr9
x77L2N8ykQJKsvvPemuGD0b6BuHMbNG0UA70Qnvre8eIuW+xx2QeKNSgLBYrNRWb
dhNIYzYYVyrPN16eugtLCLzjRot26xNBCZZ2WowMD14LitQDP2oxHTA40NocbI3b
WxTZH0im4gqpwaGauwONuOaa927qXofCsh8qzHE5Zq7o0/haBDRnE6u4+rihVYc+
MvGiexX4eAOqDOTa7i+XuytkoL/iLdOlEzivRQqXCnb2LfRYBCVHy5/UL2r5QZud
iyr4HrI83sITB93XDieAKg5SWHsvG02nDhMqjftiO/OZc4OO4D7aJl+z+fpuqxQO
VxdwSb/TrMVL66tlg2ThnHwOORGVCsmHKiCphk5s0qyRfetzTlUwj6z9p6c1+Cmf
z0qncckQNBHrXWuHyc6OgLEaKgUWhTsvh2OZK0LEuSEfgfFerAJM/aEptizf1wAG
BZMUA7yVd0BirCIjGIIrw0L8ZrOvrEyF/S6yGYuD7z5JG//exHT4L7hC8aNKl8cD
xKMGaOhCxBnWPNRuoUzVGSRD82c0nks/obJ2PUAVphA7EZFRV0vkUHSRKpfpxtSQ
igusdllxg33LzuAaVwvcedX3on0Z4eV4XQGf2womK0sg9OPXeiWVVBqs48CL40Gq
21U0SjZ4wA/eTBN4VCSPqZ9v0eyFUYKCq1byjjvh8izuwBRt6EC5/gIHDGMxxfC5
EQ8F+YF9uaJNb/rngPUP++hCiQEfBBgBCgAJBQJgrQAlAhsMAAoJECjVvFZzfEY/
M24IAKSmiRuHaFtfiMz9p8e5CDFpKKxV3XBOP7GVsx4WW/99EgeUsvMPp+s8PobN
mMxB9SqDCbFY3yc5bzAivCALOpVN64yLaenRpXdLM8HKaBIGdICGKxylFq/qM4oj
Lke4hrgFHytKGW04Af3okKK/wj+MFDe7TWydlstvisQEaJqUEXvpeVrj0aiUvR/V
AHYWoNVkwYWeEGIAqVM6BdwichusdCPrvKWXfCaLm9K8/YFc8HIQFTm80dipfWI5
nTksCQraomTXHcu5k/qkLQjmpyQITrhnfzM1EscBjKrj/7DCn35M1aNM789iRn/Q
P7y9tzY6uBU8V/OLkSolZ1iAfaA=
=wZ6X
-----END PGP PRIVATE KEY BLOCK-----

those keys are generated with this command:

KotlinPGP.generateKeyPair(
                GenerateKeyData("chave_teste", "[email protected]", "123456", KeyData(2048, Algorithm.RSA), KeyData(2048, Algorithm.RSA))
            )

and retrieved by: keyPair.publicKey and keyPair.secretKey

at postgresql, i used the publickey string to encrypt a text and encode the encrypted result as base64. use this command:
select encode(postgis.pgp_pub_encrypt('string to be encrypted and encoded', postgis.dearmor('public key string')), 'base64')

the result is:
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

when i try to decrypt this use my secret key i receive an error, see below the code used:

val decodedBytes = Base64.decode("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", Base64.DEFAULT)

val decodedString = String(decodedBytes)

val decryptResult = KotlinPGP.decrypt(
                secretKey,
                "123456",
                decodedString
)

decoded string from base64 converted to string (decodedString):

�������������"R���&�d86��i�+����hI}u�p�*����b�!۪U��r/�&�����?e��p�������T���@9E\�<�ޝ� �u�k��}2��:P��~�h��D�UpC�d��y�f_����|�Yq���Ӈ�W�/�b��z.�=�b[s���|Z��F��]7�^�7>70��0�xz���eWW���D'Z59�4U]��0�Au����8YL�;��Zz��ܴ?Ϲ�ʟ�z�e��1Q��sm�q��#g�E��B4�|�<�����#�s���بMT�bR�)�A�g��TF-�ye�+?Wh��<@>�w�=��%�����q�c�G�^��6l����f����C��+�i���X���$1���
    L�{�U؍�1RIT'g��f�*c�-X�K1�<�lt{J:x	�F�m�&Qy����G�JEtlo=���!)&x��/�a�]P\�,���9��jdI���7)jPVP�������6�������ɇ����~�

below the stacktrace of the error:

2021-05-25 10:54:16.692 13576-13576/com.example.pocpgpandroid E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.pocpgpandroid, PID: 13576
    java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) 
     Caused by: java.io.IOException: unknown object in stream: 47
        at org.bouncycastle.openpgp.PGPObjectFactory.nextObject(Unknown Source:36)
        at moe.tlaster.kotlinpgp.KotlinPGP.encryptedDecryptResult(KotlinPGP.kt:256)
        at moe.tlaster.kotlinpgp.KotlinPGP.decrypt(KotlinPGP.kt:246)
        at com.example.pocpgpandroid.FirstFragment.onViewCreated$lambda-2(FirstFragment.kt:142)
        at com.example.pocpgpandroid.FirstFragment.lambda$b3jqjhg7e5sn5psKJ4hBYyBV4pU(Unknown Source:0)
        at com.example.pocpgpandroid.-$$Lambda$FirstFragment$b3jqjhg7e5sn5psKJ4hBYyBV4pU.onClick(Unknown Source:2)
        at android.view.View.performClick(View.java:7448)
        at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
        at android.view.View.performClickInternal(View.java:7425)
        at android.view.View.access$3600(View.java:810)
        at android.view.View$PerformClick.run(View.java:28305)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) 
2021-05-25 10:54:16.746 13576-13576/com.example.pocpgpandroid I/Process: Sending signal. PID: 13576 SIG: 9

Readme typo

I don't know if this is intentional, I believe not. The second example in the Readme, "With Signing", has a typo: instead of EncryptParameter, like in the first example, there has been written EncryptParamete.

With signing

KotlinPGP.encrypt(EncryptParamete( # <--- here
    message = contentToEncrypt,
    publicKey = publicKeys, // A list of public key string
    enableSignature = true,
    privateKey = keypair.secretKey, // A private key string
    password = keyPassword
))

I believe this should be

KotlinPGP.encrypt(EncryptParameter( # <--- here
    message = contentToEncrypt,
    publicKey = publicKeys, // A list of public key string
    enableSignature = true,
    privateKey = keypair.secretKey, // A private key string
    password = keyPassword
))

Application is hung, when i using 'generateKeyPair'

fun onGenerateBtnClick(view: View){
       if (passEdit.text.toString().trim().isNotEmpty()){
            val name = first_name + " " + last_name
            Log.i("pgp", "PROGRAM STOP HERE")
            val kp = KotlinPGP.generateKeyPair(
                GenerateKeyData(
                    name = name,
                    email = "[email protected]",
                    password = passEdit.text.toString()
                )
            )
            openPGP.setText(kp.publicKey)
            privatePGP.setText(kp.publicKey)
        } else{
            Toast.makeText(this, resources.getText(R.string.generate_empty), Toast.LENGTH_LONG).show()
        }
    }

I added your library as you wrote

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