Para desenvolver a resposta de Paul Lammertsma, este comando imprimirá os nomes e assinaturas de todos os APKs no diretório atual (estou usando sh porque mais tarde preciso canalizar a saída para grep):
find . -name "*.apk" -exec echo "APK: {}" \; -exec sh -c 'keytool -printcert -jarfile "{}"' \;
Saída de amostra:
APK: ./com.google.android.youtube-10.39.54-107954130-minAPI15.apk
Signer #1:
Signature:
Owner: CN=Unknown, OU="Google, Inc", O="Google, Inc", L=Mountain View, ST=CA, C=US
Issuer: CN=Unknown, OU="Google, Inc", O="Google, Inc", L=Mountain View, ST=CA, C=US
Serial number: 4934987e
Valid from: Mon Dec 01 18:07:58 PST 2008 until: Fri Apr 18 19:07:58 PDT 2036
Certificate fingerprints:
MD5: D0:46:FC:5D:1F:C3:CD:0E:57:C5:44:40:97:CD:54:49
SHA1: 24:BB:24:C0:5E:47:E0:AE:FA:68:A5:8A:76:61:79:D9:B6:13:A6:00
SHA256: 3D:7A:12:23:01:9A:A3:9D:9E:A0:E3:43:6A:B7:C0:89:6B:FB:4F:B6:79:F4:DE:5F:E7:C2:3F:32:6C:8F:99:4A
Signature algorithm name: MD5withRSA
Version: 1
APK: ./com.google.android.youtube_10.40.56-108056134_minAPI15_maxAPI22(armeabi-v7a)(480dpi).apk
Signer #1:
Signature:
Owner: CN=Unknown, OU="Google, Inc", O="Google, Inc", L=Mountain View, ST=CA, C=US
Issuer: CN=Unknown, OU="Google, Inc", O="Google, Inc", L=Mountain View, ST=CA, C=US
Serial number: 4934987e
Valid from: Mon Dec 01 18:07:58 PST 2008 until: Fri Apr 18 19:07:58 PDT 2036
Certificate fingerprints:
MD5: D0:46:FC:5D:1F:C3:CD:0E:57:C5:44:40:97:CD:54:49
SHA1: 24:BB:24:C0:5E:47:E0:AE:FA:68:A5:8A:76:61:79:D9:B6:13:A6:00
SHA256: 3D:7A:12:23:01:9A:A3:9D:9E:A0:E3:43:6A:B7:C0:89:6B:FB:4F:B6:79:F4:DE:5F:E7:C2:3F:32:6C:8F:99:4A
Signature algorithm name: MD5withRSA
Version: 1
Ou se você se importa apenas com o SHA1:
find . -name "*.apk" -exec echo "APK: {}" \; -exec sh -c 'keytool -printcert -jarfile "{}" | grep SHA1' \;
Saída de amostra:
APK: ./com.google.android.youtube-10.39.54-107954130-minAPI15.apk
SHA1: 24:BB:24:C0:5E:47:E0:AE:FA:68:A5:8A:76:61:79:D9:B6:13:A6:00
APK: ./com.google.android.youtube_10.40.56-108056134_minAPI15_maxAPI22(armeabi-v7a)(480dpi).apk
SHA1: 24:BB:24:C0:5E:47:E0:AE:FA:68:A5:8A:76:61:79:D9:B6:13:A6:00