Class: AppInfo::Android::Signature::V2

Inherits:
Base
  • Object
show all
Includes:
Helper::Algorithm, Helper::IOBlock, Helper::Signatures
Defined in:
lib/app_info/android/signatures/v2.rb

Overview

Android v2 Signature

FULL FORMAT: OFFSET DATA TYPE DESCRIPTION

  • @+0 bytes uint32: signer size in bytes
  • @+4 bytes payload signer block
    • @+0 bytes unit32: signed data size in bytes
    • @+4 bytes payload signed data block
      • @+0 bytes unit32: digests with size in bytes
      • @+0 bytes unit32: digests with size in bytes
    • @+X bytes unit32: signatures with size in bytes
      • @+X+4 bytes payload signed data block
    • @+Y bytes unit32: public key with size in bytes
      • @+Y+4 bytes payload signed data block

Constant Summary collapse

BLOCK_ID =

V2 Signature ID 0x7109871a

[0x1a, 0x87, 0x09, 0x71].freeze

Constants included from Helper::Algorithm

Helper::Algorithm::SIG_DSA_WITH_SHA256, Helper::Algorithm::SIG_ECDSA_WITH_SHA256, Helper::Algorithm::SIG_ECDSA_WITH_SHA512, Helper::Algorithm::SIG_PROOF_OF_ROTATION_ATTR_ID, Helper::Algorithm::SIG_RSA_PKCS1_V1_5_WITH_SHA256, Helper::Algorithm::SIG_RSA_PKCS1_V1_5_WITH_SHA512, Helper::Algorithm::SIG_RSA_PSS_WITH_SHA256, Helper::Algorithm::SIG_RSA_PSS_WITH_SHA512, Helper::Algorithm::SIG_STRIPPING_PROTECTION_ATTR_ID, Helper::Algorithm::SIG_VERITY_DSA_WITH_SHA256, Helper::Algorithm::SIG_VERITY_ECDSA_WITH_SHA256, Helper::Algorithm::SIG_VERITY_RSA_PKCS1_V1_5_WITH_SHA256

Constants inherited from Base

Base::DESCRIPTION

Instance Attribute Summary collapse

Attributes inherited from Base

#verification_errors, #verified

Instance Method Summary collapse

Methods included from Helper::Algorithm

#algorithem_priority, #algorithm_match, #algorithm_method, #best_algorithem, #compare_algorithem

Methods included from Helper::Signatures

#signature_algorithms, #signed_data_certs, #signed_data_digests, #singers_block, #verify_additional_attrs, #verify_content_digest

Methods included from Helper::IOBlock

#left_bytes_check, #length_prefix_block, #loop_length_prefix_io

Methods inherited from Base

#add_verification_error, #description, #initialize, #logger, #scheme, verify

Constructor Details

This class inherits a constructor from AppInfo::Android::Signature::Base

Instance Attribute Details

#certificates ⇒ Object (readonly)

Returns the value of attribute certificates.



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# File 'lib/app_info/android/signatures/v2.rb', line 28

def certificates
  @certificates
end

#digests ⇒ Object (readonly)

Returns the value of attribute digests.



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# File 'lib/app_info/android/signatures/v2.rb', line 28

def digests
  @digests
end

Instance Method Details

#verify(**_options) ⇒ Object

TODO:

verified signatures

Verify



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# File 'lib/app_info/android/signatures/v2.rb', line 36

def verify(**_options)
  signers_block = singers_block(BLOCK_ID)
  @certificates, @digests = verified_certs(signers_block, verify: true)
  @verified = true
rescue SecurityError => e
  @certificates ||= []
  @digests ||= {}
  code = if e.message.include?('content digest')
           :content_digest_mismatch
         else
           :signature_invalid
         end
  add_verification_error(code, e.message)
end

#version ⇒ Object 



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# File 'lib/app_info/android/signatures/v2.rb', line 30

def version
  Version::V2
end