$ keytool -J-Duser.language=en -list -v -keystore app/keystore.jks -storepass testpass
Keystore type: PKCS12
Keystore provider: SUN

Your keystore contains 1 entry

Alias name: platform
Creation date: 10 Oct 2018
Entry type: PrivateKeyEntry
Certificate chain length: 1
Certificate[1]:
Owner: EMAILADDRESS=android@android.com, CN=Android, OU=Android, O=Android, L=Mountain View, ST=California, C=US
Issuer: EMAILADDRESS=android@android.com, CN=Android, OU=Android, O=Android, L=Mountain View, ST=California, C=US
Serial number: b3998086d056cffa
Valid from: Wed Apr 16 00:40:50 CEST 2008 until: Sun Sep 02 00:40:50 CEST 2035
Certificate fingerprints:
	 SHA1: 27:19:6E:38:6B:87:5E:76:AD:F7:00:E7:EA:84:E4:C6:EE:E3:3D:FA
	 SHA256: C8:A2:E9:BC:CF:59:7C:2F:B6:DC:66:BE:E2:93:FC:13:F2:FC:47:EC:77:BC:6B:2B:0D:52:C1:1F:51:19:2A:B8
Signature algorithm name: MD5withRSA (weak)
Subject Public Key Algorithm: 2048-bit RSA key
Version: 3

Extensions:

#1: ObjectId: 2.5.29.35 Criticality=false
AuthorityKeyIdentifier [
KeyIdentifier [
0000: 4F E4 A0 B3 DD 9C BA 29   F7 1D 72 87 C4 E7 C3 8F  O......)..r.....
0010: 20 86 C2 99                                         ...
]
[EMAILADDRESS=android@android.com, CN=Android, OU=Android, O=Android, L=Mountain View, ST=California, C=US]
SerialNumber: [    b3998086 d056cffa]
]

#2: ObjectId: 2.5.29.19 Criticality=false
BasicConstraints:[
  CA:true
  PathLen:2147483647
]

#3: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: 4F E4 A0 B3 DD 9C BA 29   F7 1D 72 87 C4 E7 C3 8F  O......)..r.....
0010: 20 86 C2 99                                         ...
]
]



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Warning:
<platform> uses the MD5withRSA signature algorithm which is considered a security risk.