[Realme 8 Pro] StratOS_HTC:
vbmeta GDPR variant for RMX3081.

Since GDPR rom don't have unlocked bootloader, no flashing of vbmeta dependent partitions boot, dtbo and recovery possible.

avbtool.py available at :

avbtool.py - platform/external/avb - Git at Google

Info :

vbmeta.img

C:\Program Files (x86)\Minimal ADB and Fastboot>python avbtool.py info_image --image vbmeta.img
Minimum libavb version: 1.0
Header Block: 256 bytes
Authentication Block: 576 bytes
Auxiliary Block: 6400 bytes
Public key (sha1): 1a38638478d682b11e32cdb80c6a78b6eacbce91
Algorithm: SHA256_RSA4096
Rollback Index: 0
Flags: 0
Rollback Index Location: 0
Release String: 'avbtool 1.1.0'
Descriptors:
Chain Partition descriptor:
Partition Name: boot
Rollback Index Location: 4
Public key (sha1): 1a38638478d682b11e32cdb80c6a78b6eacbce91
Chain Partition descriptor:
Partition Name: dtbo
Rollback Index Location: 3
Public key (sha1): 1a38638478d682b11e32cdb80c6a78b6eacbce91
Chain Partition descriptor:
Partition Name: recovery
Rollback Index Location: 1
Public key (sha1): 1a38638478d682b11e32cdb80c6a78b6eacbce91
Chain Partition descriptor:
Partition Name: vbmeta_system
Rollback Index Location: 2
Public key (sha1): 1a130f9ac8720d5c66e8b62c92505173633166f6
Chain Partition descriptor:
Partition Name: vbmeta_vendor
Rollback Index Location: 5
Public key (sha1): 1a130f9ac8720d5c66e8b62c92505173633166f6
Prop: com.android.build.boot.os_version -> '11'
Prop: com.android.build.boot.security_patch -> '2021-11-05'
Prop: com.android.build.boot.security_patch -> '2021-11-05'
Prop: com.android.build.odm.fingerprint -> 'qti/atoll/atoll:11/RKQ1.201112.002/root05281023:user/release-keys'
Prop: com.android.build.odm.os_version -> '11'
Hashtree descriptor:
Version of dm-verity: 1
Image Size: 65974272 bytes
Tree Offset: 65974272
Tree Size: 520192 bytes
Data Block Size: 4096 bytes
Hash Block Size: 4096 bytes
FEC num roots: 2
FEC offset: 66494464
FEC size: 532480 bytes
Hash Algorithm: sha1
Partition Name: odm
Salt: cd17909e55ad176f67af4b4ebdf73edaf9bf48a7
Root Digest: ac824b50e11b4753d4f007a93530a3bbca470b38
Flags: 0

vbmeta_system.img

C:\Program Files (x86)\Minimal ADB and Fastboot>python avbtool.py info_image --image vbmeta_system.img
Minimum libavb version: 1.0
Header Block: 256 bytes
Authentication Block: 320 bytes
Auxiliary Block: 3392 bytes
Public key (sha1): 1a130f9ac8720d5c66e8b62c92505173633166f6
Algorithm: SHA256_RSA2048
Rollback Index: 1636070400
Flags: 0
Rollback Index Location: 0
Release String: 'avbtool 1.1.0'
Descriptors:
Prop: com.android.build.system.fingerprint -> 'qti/atoll/atoll:11/RKQ1.201112.002/root05281023:user/release-keys'
Prop: com.android.build.system.os_version -> '11'
Prop: com.android.build.system.security_patch -> '2021-11-05'
Prop: com.android.build.system.security_patch -> '2021-11-05'
Prop: com.android.build.product.fingerprint -> 'qti/atoll/atoll:11/RKQ1.201112.002/root05281023:user/release-keys'
Prop: com.android.build.product.os_version -> '11'
Prop: com.android.build.product.security_patch -> '2021-11-05'
Prop: com.android.build.product.security_patch -> '2021-11-05'
Prop: com.android.build.system_ext.fingerprint -> 'qti/atoll/atoll:11/RKQ1.201112.002/root05281023:user/release-keys'
Prop: com.android.build.system_ext.os_version -> '11'
Prop: com.android.build.system_ext.security_patch -> '2021-11-05'
Prop: com.android.build.system.fingerprint -> 'qti/qssi/qssi:11/RKQ1.201112.002/root05281023:user/release-keys'
Prop: com.android.build.system.os_version -> '11'
Prop: com.android.build.system.security_patch -> '2021-11-05'
Prop: com.android.build.system.security_patch -> '2021-11-05'
Prop: com.android.build.product.fingerprint -> 'qti/qssi/qssi:11/RKQ1.201112.002/root05281023:user/release-keys'
Prop: com.android.build.product.os_version -> '11'
Prop: com.android.build.product.security_patch -> '2021-11-05'
Prop: com.android.build.product.security_patch -> '2021-11-05'
Prop: com.android.build.system_ext.fingerprint -> 'qti/qssi/qssi:11/RKQ1.201112.002/root05281023:user/release-keys'
Prop: com.android.build.system_ext.os_version -> '11'
Prop: com.android.build.system_ext.security_patch -> '2021-11-05'
Hashtree descriptor:
Version of dm-verity: 1
Image Size: 4018176 bytes
Tree Offset: 4018176
Tree Size: 36864 bytes
Data Block Size: 4096 bytes
Hash Block Size: 4096 bytes
FEC num roots: 2
FEC offset: 4055040
FEC size: 32768 bytes
Hash Algorithm: sha1
Partition Name: product
Salt: ea90cf3d978f9b3dd57ae086e7e8ff3a3f83cda9
Root Digest: 0a753c4708bfa3521f27324265a5d32663340868
Flags: 0
Hashtree descriptor:
Version of dm-verity: 1
Image Size: 1024299008 bytes
Tree Offset: 1024299008
Tree Size: 8073216 bytes
Data Block Size: 4096 bytes
Hash Block Size: 4096 bytes
FEC num roots: 2
FEC offset: 1032372224
FEC size: 8167424 bytes
Hash Algorithm: sha1
Partition Name: system
Salt: 4a5e0c61837ed051993c8b8003e3f0b3cc04e9e6
Root Digest: bb03f13b0e827bb6c911a8fbda5043361bd454fc
Flags: 0
Hashtree descriptor:
Version of dm-verity: 1
Image Size: 1258614784 bytes
Tree Offset: 1258614784
Tree Size: 9916416 bytes
Data Block Size: 4096 bytes
Hash Block Size: 4096 bytes
FEC num roots: 2
FEC offset: 1268531200
FEC size: 10035200 bytes
Hash Algorithm: sha1
Partition Name: system_ext
Salt: 0b7343a5bb191ca1d07b831fdb75518029854ff4
Root Digest: cd83991a3cf1ef068e1b208a22c5ca4ab3eba2c5
Flags: 0

vbmeta_vendor.img

C:\Program Files (x86)\Minimal ADB and Fastboot>python avbtool.py info_image --image vbmeta_vendor.img
Minimum libavb version: 1.0
Header Block: 256 bytes
Authentication Block: 320 bytes
Auxiliary Block: 1536 bytes
Public key (sha1): 1a130f9ac8720d5c66e8b62c92505173633166f6
Algorithm: SHA256_RSA2048
Rollback Index: 1636070400
Flags: 0
Rollback Index Location: 0
Release String: 'avbtool 1.1.0'
Descriptors:
Prop: com.android.build.vendor.fingerprint -> 'qti/atoll/atoll:11/RKQ1.201112.002/root05281023:user/release-keys'
Prop: com.android.build.vendor.os_version -> '11'
Prop: com.android.build.vendor.security_patch -> '2021-11-05'
Prop: com.android.build.vendor.security_patch -> '2021-11-05'
Prop: com.android.build.vendor.fingerprint -> 'qti/atoll/atoll:11/RKQ1.201112.002/root05281023:user/release-keys'
Prop: com.android.build.vendor.os_version -> '11'
Prop: com.android.build.vendor.security_patch -> '2021-11-05'
Prop: com.android.build.vendor.security_patch -> '2021-11-05'
Hashtree descriptor:
Version of dm-verity: 1
Image Size: 593604608 bytes
Tree Offset: 593604608
Tree Size: 4681728 bytes
Data Block Size: 4096 bytes
Hash Block Size: 4096 bytes
FEC num roots: 2
FEC offset: 598286336
FEC size: 4734976 bytes
Hash Algorithm: sha1
Partition Name: vendor
Salt: e868cf7fced08126a87913c9f79f8a07609ed5c1
Root Digest: 0be5f0290f1702550d417cd7eea6017ec7bb9594
Flags: 0