Results for: "Array.new"

Construct a new OpenSSL BIGNUM object.

The string must contain a valid cipher name like “AES-256-CBC”.

A list of cipher names is available by calling OpenSSL::Cipher.ciphers.

Creates an instance of OpenSSL’s configuration class.

This can be used in contexts like OpenSSL::X509::ExtensionFactory.config=

If the optional filename parameter is provided, then it is read in and parsed via parse_config.

This can raise IO exceptions based on the access, or availability of the file. A ConfigError exception may be raised depending on the validity of the data being configured.

Creates a Digest instance based on string, which is either the ln (long name) or sn (short name) of a supported digest algorithm.

If data (a String) is given, it is used as the initial input to the Digest instance, i.e.

digest = OpenSSL::Digest.new('sha256', 'digestdata')

is equivalent to

digest = OpenSSL::Digest.new('sha256')
digest.update('digestdata')

Returns an instance of OpenSSL::HMAC set with the key and digest algorithm to be used. The instance represents the initial state of the message authentication code before any data has been processed. To process data with it, use the instance method update with your data as an argument.

Example

key = 'key'
digest = OpenSSL::Digest.new('sha1')
instance = OpenSSL::HMAC.new(key, digest)
#=> f42bb0eeb018ebbd4597ae7213711ec60760843f
instance.class
#=> OpenSSL::HMAC

A note about comparisons

Two instances can be securely compared with == in constant time:

    other_instance = OpenSSL::HMAC.new('key', OpenSSL::Digest.new('sha1'))
#=> f42bb0eeb018ebbd4597ae7213711ec60760843f
instance == other_instance
#=> true

Parameters

• str - Must be a DER encoded PKCS12 string.

• pass - string

Many methods in this class aren’t documented.

Creates a new Psych::Parser instance with handler. YAML events will be called on handler. See Psych::Parser for more details.

Create a new scanner

Create a new TreeBuilder instance

Create a new Psych::Emitter that writes to io.

Creates a new Ripper::Filter instance, passes parameters src, filename, and lineno to Ripper::Lexer.new

The lexer is for internal use only.

family should be an integer, a string or a symbol.

• Socket::AF_INET, “AF_INET”, “INET”, :AF_INET, :INET

• Socket::AF_UNIX, “AF_UNIX”, “UNIX”, :AF_UNIX, :UNIX

• etc.

cmsg_level should be an integer, a string or a symbol.

• Socket::SOL_SOCKET, “SOL_SOCKET”, “SOCKET”, :SOL_SOCKET and :SOCKET

• Socket::IPPROTO_IP, “IP” and :IP

• Socket::IPPROTO_IPV6, “IPV6” and :IPV6

• Socket::IPPROTO_TCP, “TCP” and :TCP

• etc.

cmsg_type should be an integer, a string or a symbol. If a string/symbol is specified, it is interpreted depend on cmsg_level.

• Socket::SCM_RIGHTS, “SCM_RIGHTS”, “RIGHTS”, :SCM_RIGHTS, :RIGHTS for SOL_SOCKET

• Socket::IP_RECVTTL, “RECVTTL” and :RECVTTL for IPPROTO_IP

• Socket::IPV6_PKTINFO, “PKTINFO” and :PKTINFO for IPPROTO_IPV6

• etc.

cmsg_data should be a string.

p Socket::AncillaryData.new(:INET, :TCP, :NODELAY, "")
#=> #<Socket::AncillaryData: INET TCP NODELAY "">

p Socket::AncillaryData.new(:INET6, :IPV6, :PKTINFO, "")
#=> #<Socket::AncillaryData: INET6 IPV6 PKTINFO "">

remote_address is an Addrinfo object.

local_address is an Addrinfo object.

reply_proc is a Proc used to send reply back to the source.

Returns a new Socket::Option object.

sockopt = Socket::Option.new(:INET, :SOCKET, :KEEPALIVE, [1].pack("i"))
p sockopt #=> #<Socket::Option: INET SOCKET KEEPALIVE 1>

Fills in variables for Logger compatibility. If this is the first instance of Syslog::Logger, program_name may be set to change the logged program name. The facility may be set to specify the facility level which will be used.

Due to the way syslog works, only one program name may be chosen.

initialize

Creates a new deflate stream for compression. If a given argument is nil, the default value of that argument is used.

The level sets the compression level for the deflate stream between 0 (no compression) and 9 (best compression). The following constants have been defined to make code more readable:

• Zlib::DEFAULT_COMPRESSION

• Zlib::NO_COMPRESSION

• Zlib::BEST_SPEED

• Zlib::BEST_COMPRESSION

See www.zlib.net/manual.html#Constants for further information.

The window_bits sets the size of the history buffer and should be between 8 and 15. Larger values of this parameter result in better compression at the expense of memory usage.

The mem_level specifies how much memory should be allocated for the internal compression state. 1 uses minimum memory but is slow and reduces compression ratio while 9 uses maximum memory for optimal speed. The default value is 8. Two constants are defined:

• Zlib::DEF_MEM_LEVEL

• Zlib::MAX_MEM_LEVEL

The strategy sets the deflate compression strategy. The following strategies are available:

Zlib::DEFAULT_STRATEGY

For normal data

Zlib::FILTERED

For data produced by a filter or predictor

Zlib::FIXED

Prevents dynamic Huffman codes

Zlib::HUFFMAN_ONLY

Prevents string matching

Zlib::RLE

Designed for better compression of PNG image data

See the constants for further description.

Examples

Basic

open "compressed.file", "w+" do |io|
  io << Zlib::Deflate.new.deflate(File.read("big.file"))
end

Custom compression

open "compressed.file", "w+" do |compressed_io|
  deflate = Zlib::Deflate.new(Zlib::BEST_COMPRESSION,
                              Zlib::MAX_WBITS,
                              Zlib::MAX_MEM_LEVEL,
                              Zlib::HUFFMAN_ONLY)

  begin
    open "big.file" do |big_io|
      until big_io.eof? do
        compressed_io << zd.deflate(big_io.read(16384))
      end
    end
  ensure
    deflate.close
  end
end

While this example will work, for best optimization review the flags for your specific time, memory usage and output space requirements.

Creates a new inflate stream for decompression. window_bits sets the size of the history buffer and can have the following values:

0

Have inflate use the window size from the zlib header of the compressed stream.

(8..15)

Overrides the window size of the inflate header in the compressed stream. The window size must be greater than or equal to the window size of the compressed stream.

Greater than 15

Add 32 to window_bits to enable zlib and gzip decoding with automatic header detection, or add 16 to decode only the gzip format (a Zlib::DataError will be raised for a non-gzip stream).

(-8..-15)

Enables raw deflate mode which will not generate a check value, and will not look for any check values for comparison at the end of the stream.

This is for use with other formats that use the deflate compressed data format such as zip which provide their own check values.

Example

open "compressed.file" do |compressed_io|
  zi = Zlib::Inflate.new(Zlib::MAX_WBITS + 32)

  begin
    open "uncompressed.file", "w+" do |uncompressed_io|
      uncompressed_io << zi.inflate(compressed_io.read)
    end
  ensure
    zi.close
  end
end

Creates a GzipWriter object associated with io. level and strategy should be the same as the arguments of Zlib::Deflate.new. The GzipWriter object writes gzipped data to io. io must respond to the write method that behaves the same as IO#write.

The options hash may be used to set the encoding of the data. :external_encoding, :internal_encoding and :encoding may be set as in IO::new.

Creates a GzipReader object associated with io. The GzipReader object reads gzipped data from io, and parses/decompresses it. The io must have a read method that behaves same as the IO#read.

The options hash may be used to set the encoding of the data. :external_encoding, :internal_encoding and :encoding may be set as in IO::new.

If the gzip file header is incorrect, raises an Zlib::GzipFile::Error exception.