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Pad encryption header to 64 bytes

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This commit is contained in:
sjanusz-r7 2023-10-12 17:11:06 +01:00
parent 93d467cd4a
commit 10caac0285
2 changed files with 6 additions and 6 deletions
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10
gem/lib/metasploit-payloads/crypto.rb
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@ -2,10 +2,10 @@ require 'openssl'
module MetasploitPayloads
module Crypto
CIPHER_NAME = 'chacha20'.freeze
IV = 'EncryptedPayload'.freeze # 16 bytes
KEY = 'Rapid7MetasploitEncryptedPayload'.freeze # 32 bytes
ENCRYPTED_PAYLOAD_HEADER = 'encrypted_payload_chacha20_v1'.freeze
CIPHER_NAME = 'chacha20'.b.freeze
IV = 'EncryptedPayload'.b.freeze # 16 bytes
KEY = 'Rapid7MetasploitEncryptedPayload'.b.freeze # 32 bytes
ENCRYPTED_PAYLOAD_HEADER = 'encrypted_payload_chacha20_v1'.ljust(64, '_').b.freeze
def self.encrypt(plaintext: '')
raise ::ArgumentError, 'Unable to encrypt plaintext: ' << plaintext, caller unless plaintext.to_s
@ -41,4 +41,4 @@ module MetasploitPayloads
output
end
end
end
end

2
gem/spec/metasploit_payloads/crypto_spec.rb
View File

@ -3,7 +3,7 @@ require 'metasploit-payloads'
RSpec.describe ::MetasploitPayloads::Crypto do
describe '#encrypt' do
let(:encrypted_header) { "encrypted_payload_chacha20_v1".b }
let(:encrypted_header) { "encrypted_payload_chacha20_v1".ljust(64, '_').b }
let(:plaintext) { "Hello World!".b }
let(:ciphertext) { encrypted_header + "\\c\xB6N\x95\xE58\x8D\xDF\xBF4c".b }