diff options
| -rw-r--r-- | data/7.txt | 64 | ||||
| -rw-r--r-- | src/solvers/Challenge7.scala | 36 | ||||
| -rw-r--r-- | test/Set1Spec.scala | 85 |
3 files changed, 185 insertions, 0 deletions
diff --git a/data/7.txt b/data/7.txt new file mode 100644 index 0000000..c02ff8a --- /dev/null +++ b/data/7.txt @@ -0,0 +1,64 @@ +CRIwqt4+szDbqkNY+I0qbDe3LQz0wiw0SuxBQtAM5TDdMbjCMD/venUDW9BL +PEXODbk6a48oMbAY6DDZsuLbc0uR9cp9hQ0QQGATyyCESq2NSsvhx5zKlLtz +dsnfK5ED5srKjK7Fz4Q38/ttd+stL/9WnDzlJvAo7WBsjI5YJc2gmAYayNfm +CW2lhZE/ZLG0CBD2aPw0W417QYb4cAIOW92jYRiJ4PTsBBHDe8o4JwqaUac6 +rqdi833kbyAOV/Y2RMbN0oDb9Rq8uRHvbrqQJaJieaswEtMkgUt3P5Ttgeh7 +J+hE6TR0uHot8WzHyAKNbUWHoi/5zcRCUipvVOYLoBZXlNu4qnwoCZRSBgvC +wTdz3Cbsp/P2wXB8tiz6l9rL2bLhBt13Qxyhhu0H0+JKj6soSeX5ZD1Rpilp +9ncR1tHW8+uurQKyXN4xKeGjaKLOejr2xDIw+aWF7GszU4qJhXBnXTIUUNUf +RlwEpS6FZcsMzemQF30ezSJHfpW7DVHzwiLyeiTJRKoVUwo43PXupnJXDmUy +sCa2nQz/iEwyor6kPekLv1csm1Pa2LZmbA9Ujzz8zb/gFXtQqBAN4zA8/wt0 +VfoOsEZwcsaLOWUPtF/Ry3VhlKwXE7gGH/bbShAIKQqMqqUkEucZ3HPHAVp7 +ZCn3Ox6+c5QJ3Uv8V7L7SprofPFN6F+kfDM4zAc59do5twgDoClCbxxG0L19 +TBGHiYP3CygeY1HLMrX6KqypJfFJW5O9wNIF0qfOC2lWFgwayOwq41xdFSCW +0/EBSc7cJw3N06WThrW5LimAOt5L9c7Ik4YIxu0K9JZwAxfcU4ShYu6euYmW +LP98+qvRnIrXkePugS9TSOJOHzKUoOcb1/KYd9NZFHEcp58Df6rXFiz9DSq8 +0rR5Kfs+M+Vuq5Z6zY98/SP0A6URIr9NFu+Cs9/gf+q4TRwsOzRMjMQzJL8f +7TXPEHH2+qEcpDKz/5pE0cvrgHr63XKu4XbzLCOBz0DoFAw3vkuxGwJq4Cpx +kt+eCtxSKUzNtXMn/mbPqPl4NZNJ8yzMqTFSODS4bYTBaN/uQYcOAF3NBYFd +5x9TzIAoW6ai13a8h/s9i5FlVRJDe2cetQhArrIVBquF0L0mUXMWNPFKkaQE +BsxpMCYh7pp7YlyCNode12k5jY1/lc8jQLQJ+EJHdCdM5t3emRzkPgND4a7O +NhoIkUUS2R1oEV1toDj9iDzGVFwOvWyt4GzA9XdxT333JU/n8m+N6hs23MBc +Z086kp9rJGVxZ5f80jRz3ZcjU6zWjR9ucRyjbsuVn1t4EJEm6A7KaHm13m0v +wN/O4KYTiiY3aO3siayjNrrNBpn1OeLv9UUneLSCdxcUqjRvOrdA5NYv25Hb +4wkFCIhC/Y2ze/kNyis6FrXtStcjKC1w9Kg8O25VXB1Fmpu+4nzpbNdJ9LXa +hF7wjOPXN6dixVKpzwTYjEFDSMaMhaTOTCaqJig97624wv79URbCgsyzwaC7 +YXRtbTstbFuEFBee3uW7B3xXw72mymM2BS2uPQ5NIwmacbhta8aCRQEGqIZ0 +78YrrOlZIjar3lbTCo5o6nbbDq9bvilirWG/SgWINuc3pWl5CscRcgQQNp7o +LBgrSkQkv9AjZYcvisnr89TxjoxBO0Y93jgp4T14LnVwWQVx3l3d6S1wlsci +dVeaM24E/JtS8k9XAvgSoKCjyiqsawBMzScXCIRCk6nqX8ZaJU3rZ0LeOMTU +w6MC4dC+aY9SrCvNQub19mBdtJUwOBOqGdfd5IoqQkaL6DfOkmpnsCs5PuLb +GZBVhah5L87IY7r6TB1V7KboXH8PZIYc1zlemMZGU0o7+etxZWHgpdeX6JbJ +Is3ilAzYqw/Hz65no7eUxcDg1aOaxemuPqnYRGhW6PvjZbwAtfQPlofhB0jT +Ht5bRlzF17rn9q/6wzlc1ssp2xmeFzXoxffpELABV6+yj3gfQ/bxIB9NWjdZ +K08RX9rjm9CcBlRQeTZrD67SYQWqRpT5t7zcVDnx1s7ZffLBWm/vXLfPzMaQ +YEJ4EfoduSutjshXvR+VQRPs2TWcF7OsaE4csedKUGFuo9DYfFIHFDNg+1Py +rlWJ0J/X0PduAuCZ+uQSsM/ex/vfXp6Z39ngq4exUXoPtAIqafrDMd8SuAty +EZhyY9V9Lp2qNQDbl6JI39bDz+6pDmjJ2jlnpMCezRK89cG11IqiUWvIPxHj +oiT1guH1uk4sQ2Pc1J4zjJNsZgoJDcPBbfss4kAqUJvQyFbzWshhtVeAv3dm +gwUENIhNK/erjpgw2BIRayzYw001jAIF5c7rYg38o6x3YdAtU3d3QpuwG5xD +fODxzfL3yEKQr48C/KqxI87uGwyg6H5gc2AcLU9JYt5QoDFoC7PFxcE3RVqc +7/Um9Js9X9UyriEjftWt86/tEyG7F9tWGxGNEZo3MOydwX/7jtwoxQE5ybFj +WndqLp8DV3naLQsh/Fz8JnTYHvOR72vuiw/x5D5PFuXV0aSVvmw5Wnb09q/B +owS14WzoHH6ekaWbh78xlypn/L/M+nIIEX1Ol3TaVOqIxvXZ2sjm86xRz0Ed +oHFfupSekdBULCqptxpFpBshZFvauUH8Ez7wA7wjL65GVlZ0f74U7MJVu9Sw +sZdgsLmnsQvr5n2ojNNBEv+qKG2wpUYTmWRaRc5EClUNfhzh8iDdHIsl6edO +ewORRrNiBay1NCzlfz1cj6VlYYQUM9bDEyqrwO400XQNpoFOxo4fxUdd+AHm +CBhHbyCR81/C6LQTG2JQBvjykG4pmoqnYPxDyeiCEG+JFHmP1IL+jggdjWhL +WQatslrWxuESEl3PEsrAkMF7gt0dBLgnWsc1cmzntG1rlXVi/Hs2TAU3RxEm +MSWDFubSivLWSqZj/XfGWwVpP6fsnsfxpY3d3h/fTxDu7U8GddaFRQhJ+0ZO +dx6nRJUW3u6xnhH3mYVRk88EMtpEpKrSIWfXphgDUPZ0f4agRzehkn9vtzCm +NjFnQb0/shnqTh4Mo/8oommbsBTUKPYS7/1oQCi12QABjJDt+LyUan+4iwvC +i0k0IUIHvk21381vC0ixYDZxzY64+xx/RNID+iplgzq9PDZgjc8L7jMg+2+m +rxPS56e71m5E2zufZ4d+nFjIg+dHD/ShNPzVpXizRVUERztLuak8Asah3/yv +wOrH1mKEMMGC1/6qfvZUgFLJH5V0Ep0n2K/Fbs0VljENIN8cjkCKdG8aBnef +EhITdV7CVjXcivQ6efkbOQCfkfcwWpaBFC8tD/zebXFE+JshW16D4EWXMnSm +/9HcGwHvtlAj04rwrZ5tRvAgf1IR83kqqiTvqfENcj7ddCFwtNZrQK7EJhgB +5Tr1tBFcb9InPRtS3KYteYHl3HWR9t8E2YGE8IGrS1sQibxaK/C0kKbqIrKp +npwtoOLsZPNbPw6K2jpko9NeZAx7PYFmamR4D50KtzgELQcaEsi5aCztMg7f +p1mK6ijyMKIRKwNKIYHagRRVLNgQLg/WTKzGVbWwq6kQaQyArwQCUXo4uRty +zGMaKbTG4dns1OFB1g7NCiPb6s1lv0/lHFAF6HwoYV/FPSL/pirxyDSBb/FR +RA3PIfmvGfMUGFVWlyS7+O73l5oIJHxuaJrR4EenzAu4Avpa5d+VuiYbM10a +LaVegVPvFn4pCP4U/Nbbw4OTCFX2HKmWEiVBB0O3J9xwXWpxN1Vr5CDi75Fq +NhxYCjgSJzWOUD34Y1dAfcj57VINmQVEWyc8Tch8vg9MnHGCOfOjRqp0VGyA +S15AVD2QS1V6fhRimJSVyT6QuGb8tKRsl2N+a2Xze36vgMhw7XK7zh//jC2H diff --git a/src/solvers/Challenge7.scala b/src/solvers/Challenge7.scala new file mode 100644 index 0000000..ee1745a --- /dev/null +++ b/src/solvers/Challenge7.scala @@ -0,0 +1,36 @@ +package ixee.cryptopals.solvers + +import scala.io.Source +import ixee.cryptopals.utils.ByteUtils._ +import ixee.cryptopals.utils.ConversionUtils._ +import ixee.cryptopals.utils.FunctionUtils._ +import ixee.cryptopals.utils._ +import io.github.marklister.base64.Base64._ +import javax.crypto.Cipher +import javax.crypto.spec.SecretKeySpec + +object Challenge7 { + val path = "./data/7.txt" + + lazy val ciphertext = + Source + .fromFile(path) + .getLines() + .toSeq + .flatten + .mkString + .toByteArray + + val key = new SecretKeySpec( + "YELLOW SUBMARINE".asBytes.toArray, + "AES" + ) + + def run = { + val cipher = Cipher.getInstance( + "AES/ECB/PKCS5Padding" + ) + cipher.init(Cipher.DECRYPT_MODE, key) + new String(cipher.doFinal(ciphertext)) + } +} diff --git a/test/Set1Spec.scala b/test/Set1Spec.scala index 628889c..b017803 100644 --- a/test/Set1Spec.scala +++ b/test/Set1Spec.scala @@ -6,6 +6,7 @@ class Set1Spec extends IxeeSpec { import ixee.cryptopals.utils.ConversionUtils._ import ixee.cryptopals.utils.ByteUtils._ + import ixee.cryptopals.utils.StreamUtils._ import ixee.cryptopals.solvers._ "Set1" - { @@ -46,6 +47,90 @@ class Set1Spec extends IxeeSpec { (("Now that the party is jumping\n", 170)) } } + + "Challenge 5: repeating-key xor" - { + val sourceText = """|Burning 'em, if you ain't quick and nimble + |I go crazy when I hear a cymbal""".stripMargin + + val key = "ICE" + + val ciphertext = + sourceText.asBytes.to[Stream] xor key.asBytes.to[Stream].continually + + ciphertext.hex mustBe( + Seq( + "0b3637272a2b2e63622c2e69", + "692a23693a2a3c6324202d62", + "3d63343c2a26226324272765", + "272a282b2f20430a652e2c65", + "2a3124333a653e2b2027630c", + "692b20283165286326302e27", + "282f" + ).mkString("") + ) + } + + "Challenge 6: break repeating-key xor" - { + + "hamming distance should be computed correctly" in { + + val textA = "this is a test" + val textB = "wokka wokka!!!" + + hammingDistance(textA, textB) mustBe 37 + + } + + "prioritizes likely key sizes" in { + + val sourceText = + """|the quick brown fox jumps over the lazy dog + |This code is going to turn out to be surprisingly useful later on. + |Breaking repeating-key XOR ("Vigenere") statistically is obviously + | an academic exercise, a "Crypto 101" thing. But more people "know + | how" to break it than can actually break it, and a similar + | technique breaks something much more important.""".stripMargin.replace("\n", "") + + val key = "ICE IS REALLY NICE" + + val ciphertext = sourceText.asByteStream xor key.asByteStream.continually + + val expectedKeySize = XorDecrypt.inferKeySize(ciphertext) + + expectedKeySize mustBe key.length + + } + + "cracks multi-byte keys" in { + val sourceText = + """|the quick brown fox jumps over the lazy dog + |This code is going to turn out to be surprisingly useful later on. + |Breaking repeating-key XOR statistically is obviously + | an academic exercise, a "Crypto 101" thing. But more people "know + | how" to break it than can actually break it, and a similar + | technique breaks something much more important.""".stripMargin.replace("\n", "") + + val key = "ICE IS REALLY NICE" + + val ciphertext = sourceText.asByteStream xor key.asByteStream.continually + + XorDecrypt.findBestMultiByteKey(ciphertext).take(key.length).asAscii mustBe key + + XorDecrypt.crackForMultiByteKey(ciphertext) mustBe sourceText + } + + "cracks the challenge text" in { + + Challenge6.run mustBe Challenge6.expectation + + } + } + + "Challenge 7: AES/ECB mode" in { + + Challenge7.run mustBe Challenge6.expectation + + } } } |