Sha256: 8f0c762a239676ed869d16940616ac5a9595ee12af1ac7adc102847bd0a20846
Contents?: true
Size: 761 Bytes
Versions: 51
Compression:
Stored size: 761 Bytes
Contents
module RubySMB
module Crypto
module KDF
def self.counter_mode(ki, label, context, length: 128)
digest = OpenSSL::Digest.new('SHA256')
r = 32
n = length / 256
n = 1 if n == 0
raise ArgumentError if n > 2**r - 1
result = ""
n.times do |i|
input = [i + 1].pack('L>')
input << label
input << "\x00"
input << context
input << [length].pack('L>')
k = OpenSSL::HMAC.digest(digest, ki, input)
result << k
end
return result[0...(length / 8)]
rescue OpenSSL::OpenSSLError => e
raise RubySMB::Error::EncryptionError, "Crypto::KDF.counter_mode OpenSSL error: #{e.message}"
end
end
end
end
Version data entries
51 entries across 51 versions & 1 rubygems