Results for: "Psych"

accessing

The iterator version of the tsort method. obj.tsort_each is similar to obj.tsort.each, but modification of obj during the iteration may lead to unexpected results.

tsort_each returns nil. If there is a cycle, TSort::Cyclic is raised.

class G
  include TSort
  def initialize(g)
    @g = g
  end
  def tsort_each_child(n, &b) @g[n].each(&b) end
  def tsort_each_node(&b) @g.each_key(&b) end
end

graph = G.new({1=>[2, 3], 2=>[4], 3=>[2, 4], 4=>[]})
graph.tsort_each {|n| p n }
#=> 4
#   2
#   3
#   1

The iterator version of the TSort.tsort method.

The graph is represented by each_node and each_child. each_node should have call method which yields for each node in the graph. each_child should have call method which takes a node argument and yields for each child node.

g = {1=>[2, 3], 2=>[4], 3=>[2, 4], 4=>[]}
each_node = lambda {|&b| g.each_key(&b) }
each_child = lambda {|n, &b| g[n].each(&b) }
TSort.tsort_each(each_node, each_child) {|n| p n }
#=> 4
#   2
#   3
#   1

@visibility private

Sends “close notify” to the peer and tries to shut down the SSL connection gracefully.

If sync_close is set to true, the underlying IO is also closed.

Reads length bytes from the SSL connection. If a pre-allocated buffer is provided the data will be written into it.

Writes string to the SSL connection.

Calls block once for each element in self, passing that element as parameter asn1. If no block is given, an enumerator is returned instead.

Example

asn1_ary.each do |asn1|
  puts asn1
end

Returns the challenge string associated with this SPKI.

Parameters

• str - the challenge string to be set for this instance

Sets the challenge to be associated with the SPKI. May be used by the server, e.g. to prevent replay.

Computes and returns the DSA signature of string, where string is expected to be an already-computed message digest of the original input data. The signature is issued using the private key of this DSA instance.

Parameters

• string is a message digest of the original input data to be signed

Example

dsa = OpenSSL::PKey::DSA.new(2048)
doc = "Sign me"
digest = OpenSSL::Digest::SHA1.digest(doc)
sig = dsa.syssign(digest)

Verifies whether the signature is valid given the message digest input. It does so by validating sig using the public key of this DSA instance.

Parameters

• digest is a message digest of the original input data to be signed

• sig is a DSA signature value

Example

dsa = OpenSSL::PKey::DSA.new(2048)
doc = "Sign me"
digest = OpenSSL::Digest::SHA1.digest(doc)
sig = dsa.syssign(digest)
puts dsa.sysverify(digest, sig) # => true