exth_crypto v0.1.6 ExthCrypto.AES
Defines standard functions for use with AES symmetric cryptography in block mode.
Link to this section Summary
Functions
Returns the blocksize for AES encryption when used as block mode encryption
Decrypts the given binary with the given private key
Encrypts a given binary with the given public key. For block mode, this is the standard encrypt operation. For streaming mode, this will return the final block of the stream
Decrypts data from an already initialized AES stream, returning a stream with updated state, as well as the plaintext
Encrypts data with an already initialized AES stream, returning a stream with updated state, as well as the ciphertext
Initializes an AES stream in the given mode with a given key and init vector
Link to this section Functions
Returns the blocksize for AES encryption when used as block mode encryption.
Examples
iex> ExthCrypto.AES.block_size
32
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decrypt(ciphertext, atom, symmetric_key)
decrypt( ExthCrypto.Cipher.ciphertext(), ExthCrypto.Cipher.mode(), ExthCrypto.symmetric_key() ) :: ExthCrypto.Cipher.plaintext()
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decrypt(ciphertext, atom, symmetric_key, init_vector)
Decrypts the given binary with the given private key.
Examples
iex> <<86, 16, 7, 47, 97, 219, 8, 46, 16, 170, 70, 100, 131, 140, 241, 28>>
...> |> ExthCrypto.AES.decrypt(:cbc, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
<<0, 0, 0, 0, 0, 0, 0, 0, 0>> <> "obi wan"
iex> <<219, 181, 173, 235, 88, 139, 229, 61, 172, 142, 36, 195, 83, 203, 237, 39>>
...> |> ExthCrypto.AES.decrypt(:cbc, ExthCrypto.Test.symmetric_key(:key_b), ExthCrypto.Test.init_vector)
<<0, 0, 0, 0, 0, 0, 0, 0, 0>> <> "obi wan"
iex> <<134, 126, 59, 64, 83, 197, 85, 40, 155, 178, 52, 165, 27, 190, 60, 170>>
...> |> ExthCrypto.AES.decrypt(:cbc, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector(2))
<<0, 0, 0, 0, 0, 0, 0, 0, 0>> <> "obi wan"
iex> <<54, 252, 188, 111, 221, 182, 65, 54, 77, 143, 127, 188, 176, 178, 50, 160>>
...> |> ExthCrypto.AES.decrypt(:cbc, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
<<0, 0, 0, 0, 0>> <> "jedi knight"
iex> "3ee326e03303a303df6eac828b0bdc8ed67254b44a6a79cd0082bc245977b0e7d4283d63a346744d2f1ecaafca8be906d9f3d27db914d80b601d7e0c598418380e5fe2b48c0e0b8454c6d251f577f28f"
...> |> ExthCrypto.Math.hex_to_bin
...> |> ExthCrypto.AES.decrypt(:cbc, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
<<0, 0, 0, 0, 0, 0, 0, 0, 0, 0>> <> "Did you ever hear the story of Darth Plagueis The Wise? I thought not."
iex> <<32, 99, 57, 7, 64, 82, 28>>
...> |> ExthCrypto.AES.decrypt(:ctr, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
"obi wan"
iex> <<156, 176, 33, 64, 69, 16, 173>>
...> |> ExthCrypto.AES.decrypt(:ctr, ExthCrypto.Test.symmetric_key(:key_b), ExthCrypto.Test.init_vector)
"obi wan"
iex> <<214, 99, 7, 241, 219, 189, 178>>
...> |> ExthCrypto.AES.decrypt(:ctr, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector(2))
"obi wan"
iex> <<37, 100, 52, 78, 23, 88, 28, 22, 254, 47, 32>>
...> |> ExthCrypto.AES.decrypt(:ctr, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
"jedi knight"
iex> "0b6834074e5c075ffc31318cc03cba1fe35648a6f149a74952661473b73570fb98332e31870c111d3ae5ccff2154bd4083a7ee4bfd19bc85eba77835aac4cea881ada2630cdd"
...> |> ExthCrypto.Math.hex_to_bin
...> |> ExthCrypto.AES.decrypt(:ctr, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
"Did you ever hear the story of Darth Plagueis The Wise? I thought not."
iex> ExthCrypto.AES.decrypt(<<98, 60, 215, 107, 189, 132, 176, 63, 62, 225, 92, 13, 70, 53, 187, 240>>, :ecb, ExthCrypto.Test.symmetric_key)
<<0, 0, 0, 0, 0>> <> "jedi knight"
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encrypt(plaintext, atom, symmetric_key)
encrypt( ExthCrypto.Cipher.plaintext(), ExthCrypto.Cipher.mode(), ExthCrypto.symmetric_key() ) :: ExthCrypto.Cipher.ciphertext()
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encrypt(plaintext, atom, symmetric_key, init_vector)
Encrypts a given binary with the given public key. For block mode, this is the standard encrypt operation. For streaming mode, this will return the final block of the stream.
Note: for streaming modes, init_vector is the same as ICB.
Examples
iex> ExthCrypto.AES.encrypt("obi wan", :cbc, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
<<86, 16, 7, 47, 97, 219, 8, 46, 16, 170, 70, 100, 131, 140, 241, 28>>
iex> ExthCrypto.AES.encrypt("obi wan", :cbc, ExthCrypto.Test.symmetric_key(:key_b), ExthCrypto.Test.init_vector)
<<219, 181, 173, 235, 88, 139, 229, 61, 172, 142, 36, 195, 83, 203, 237, 39>>
iex> ExthCrypto.AES.encrypt("obi wan", :cbc, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector(2))
<<134, 126, 59, 64, 83, 197, 85, 40, 155, 178, 52, 165, 27, 190, 60, 170>>
iex> ExthCrypto.AES.encrypt("jedi knight", :cbc, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
<<54, 252, 188, 111, 221, 182, 65, 54, 77, 143, 127, 188, 176, 178, 50, 160>>
iex> ExthCrypto.AES.encrypt("Did you ever hear the story of Darth Plagueis The Wise? I thought not.", :cbc, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector) |> ExthCrypto.Math.bin_to_hex
"3ee326e03303a303df6eac828b0bdc8ed67254b44a6a79cd0082bc245977b0e7d4283d63a346744d2f1ecaafca8be906d9f3d27db914d80b601d7e0c598418380e5fe2b48c0e0b8454c6d251f577f28f"
iex> ExthCrypto.AES.encrypt("obi wan", :ctr, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
<<32, 99, 57, 7, 64, 82, 28>>
iex> ExthCrypto.AES.encrypt("obi wan", :ctr, ExthCrypto.Test.symmetric_key(:key_b), ExthCrypto.Test.init_vector)
<<156, 176, 33, 64, 69, 16, 173>>
iex> ExthCrypto.AES.encrypt("obi wan", :ctr, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector(2))
<<214, 99, 7, 241, 219, 189, 178>>
iex> ExthCrypto.AES.encrypt("jedi knight", :ctr, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector)
<<37, 100, 52, 78, 23, 88, 28, 22, 254, 47, 32>>
iex> ExthCrypto.AES.encrypt("Did you ever hear the story of Darth Plagueis The Wise? I thought not.", :ctr, ExthCrypto.Test.symmetric_key, ExthCrypto.Test.init_vector) |> ExthCrypto.Math.bin_to_hex
"0b6834074e5c075ffc31318cc03cba1fe35648a6f149a74952661473b73570fb98332e31870c111d3ae5ccff2154bd4083a7ee4bfd19bc85eba77835aac4cea881ada2630cdd"
iex> ExthCrypto.AES.encrypt("jedi knight", :ecb, ExthCrypto.Test.symmetric_key)
<<98, 60, 215, 107, 189, 132, 176, 63, 62, 225, 92, 13, 70, 53, 187, 240>>
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stream_decrypt(plaintext, stream)
stream_decrypt(ExthCrypto.Cipher.ciphertext(), ExthCrypto.Cipher.stream()) :: {ExthCrypto.Cipher.stream(), ExthCrypto.Cipher.plaintrxt()}
Decrypts data from an already initialized AES stream, returning a stream with updated state, as well as the plaintext.
Examples
iex> stream = ExthCrypto.AES.stream_init(:ctr, ExthCrypto.Test.symmetric_key(), ExthCrypto.Test.init_vector)
iex> {_stream_2, ciphertext} = ExthCrypto.AES.stream_encrypt("hello", stream)
iex> {_stream_3, plaintext} = ExthCrypto.AES.stream_decrypt(ciphertext, stream)
iex> plaintext
"hello"
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stream_encrypt(plaintext, stream)
stream_encrypt(ExthCrypto.Cipher.plaintext(), ExthCrypto.Cipher.stream()) :: {ExthCrypto.Cipher.stream(), ExthCrypto.Cipher.ciphertext()}
Encrypts data with an already initialized AES stream, returning a stream with updated state, as well as the ciphertext.
Examples
iex> stream = ExthCrypto.AES.stream_init(:ctr, ExthCrypto.Test.symmetric_key(), ExthCrypto.Test.init_vector)
iex> {_stream_2, ciphertext} = ExthCrypto.AES.stream_encrypt("hello", stream)
iex> ciphertext
"'d<KX"
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stream_init(atom, symmetric_key, init_vector)
stream_init( ExthCrypto.Cipher.mode(), ExthCrypto.Key.symmetric_key(), ExthCrypto.Cipher.init_vector() ) :: ExthCrypto.Cipher.stream()
Initializes an AES stream in the given mode with a given key and init vector.
Examples
iex> stream = ExthCrypto.AES.stream_init(:ctr, ExthCrypto.Test.symmetric_key(), ExthCrypto.Test.init_vector)
iex> is_nil(stream)
false