cryptopals, branch HEAD

challenge 27: recover the key from cbc with iv=key

2025-10-28T15:23:35Z

commit 6f6e9b9d3b4bfee48d3874df10d7cc854d05bfc5 parent 5ba2137db9ed643b499a3ce25b56ca55398a1467 Author: Jack Sangdahl Date: Tue, 28 Oct 2025 09:23:35 -0600 challenge 27: recover the key from cbc with iv=key

challenge 26: ctr bitflipping

2025-10-27T15:57:55Z

commit 5ba2137db9ed643b499a3ce25b56ca55398a1467 parent 3601db73f0e355cb6e74720aadeedbd19d1acfee Author: Jack Sangdahl Date: Mon, 27 Oct 2025 09:57:55 -0600 challenge 26: ctr bitflipping

challenge 25: break random access read/write aes ctr

2025-10-26T03:42:23Z

commit 3601db73f0e355cb6e74720aadeedbd19d1acfee parent b7c3a969c06037f3f56be3ff125723e89d8a5ece Author: Jack Sangdahl Date: Sat, 25 Oct 2025 21:42:23 -0600 challenge 25: break random access read/write aes ctr

challenge 24: create the mt19937 stream cipher and break it

2025-10-26T03:08:56Z

commit b7c3a969c06037f3f56be3ff125723e89d8a5ece parent 6faa2cffc1514f62f81440c66fe177b47304e17e Author: Jack Sangdahl Date: Sat, 25 Oct 2025 21:08:56 -0600 challenge 24: create the mt19937 stream cipher and break it

challenge 23: clone an mt19937 rng from its output

2025-10-26T03:07:55Z

commit 6faa2cffc1514f62f81440c66fe177b47304e17e parent d51c2413fea0bc38bcf09fef04101aa58a2b6d7a Author: Jack Sangdahl Date: Sat, 25 Oct 2025 21:07:55 -0600 challenge 23: clone an mt19937 rng from its output

challenge 22: crack an mt19937 seed

2025-10-24T04:39:05Z

commit d51c2413fea0bc38bcf09fef04101aa58a2b6d7a parent 245c17d8ba7951a8feab3a43604a39169d2e1a69 Author: Jack Sangdahl Date: Thu, 23 Oct 2025 22:39:05 -0600 challenge 22: crack an mt19937 seed

chore: Add symlink for challenge 19 -> 20

2025-10-24T02:49:21Z

commit 245c17d8ba7951a8feab3a43604a39169d2e1a69 parent 4dda41b3c51551872d4c650f6fcf55859c1abe9c Author: Jack Sangdahl Date: Thu, 23 Oct 2025 20:49:21 -0600 chore: Add symlink for challenge 19 -> 20

challenge 21: implement the mt19937 mersenne twister rng

2025-10-23T17:04:38Z

commit 4dda41b3c51551872d4c650f6fcf55859c1abe9c parent bf02706fd5fb6adea3f1c66d7fc798888d9d8cbb Author: Jack Sangdahl Date: Thu, 23 Oct 2025 11:04:38 -0600 challenge 21: implement the mt19937 mersenne twister rng

challenge 20: break fixed-nonce ctr statistically

2025-10-23T15:07:50Z

commit bf02706fd5fb6adea3f1c66d7fc798888d9d8cbb parent 93665072a4f6f4fd829920648080236e124e4328 Author: Jack Sangdahl Date: Thu, 23 Oct 2025 09:07:50 -0600 challenge 20: break fixed-nonce ctr statistically

chore: Adding missing header on Linux systems

2025-10-19T13:55:52Z

commit 93665072a4f6f4fd829920648080236e124e4328 parent ca427481a713d09da50b0b69df82bd927031c6ed Author: Jack Sangdahl Date: Sun, 19 Oct 2025 07:55:52 -0600 chore: Adding missing header on Linux systems

challenge 18: implement ctr, the stream cipher mode

2025-10-19T03:13:24Z

commit ca427481a713d09da50b0b69df82bd927031c6ed parent eace2b19a5f0ef8349783ae9a40aaa05c0638674 Author: Jack Sangdahl Date: Sat, 18 Oct 2025 21:13:24 -0600 challenge 18: implement ctr, the stream cipher mode

challenge 17: the cbc padding oracle

2025-10-17T14:45:13Z

commit eace2b19a5f0ef8349783ae9a40aaa05c0638674 parent bc70e11286a48ba9efbf259c1a00ad98c076412e Author: Jack Sangdahl Date: Fri, 17 Oct 2025 08:45:13 -0600 challenge 17: the cbc padding oracle

challenge 16: cbc bitflipping attacks

2025-10-15T15:00:43Z

commit bc70e11286a48ba9efbf259c1a00ad98c076412e parent 1b2b4397beceb8fab31dcaaae7f5340d77e95034 Author: Jack Sangdahl Date: Wed, 15 Oct 2025 09:00:43 -0600 challenge 16: cbc bitflipping attacks

challenge 15: pkcs#7 padding validation

2025-10-14T15:24:55Z

commit 1b2b4397beceb8fab31dcaaae7f5340d77e95034 parent 2bc60b7d2f6c303799d76aedb948bb547f491c3e Author: Jack Sangdahl Date: Tue, 14 Oct 2025 09:24:55 -0600 challenge 15: pkcs#7 padding validation

challenge 14: byte-at-a-time ecb decryption (hard)

2025-10-14T15:12:38Z

commit 2bc60b7d2f6c303799d76aedb948bb547f491c3e parent 58d7943c0d6b6b425b0c1bc2b5f3a4d81087dbf8 Author: Jack Sangdahl Date: Tue, 14 Oct 2025 09:12:38 -0600 challenge 14: byte-at-a-time ecb decryption (hard)

challenge 13: ecb cut-and-paste

2025-10-14T03:52:01Z

commit 58d7943c0d6b6b425b0c1bc2b5f3a4d81087dbf8 parent 4c3995a8afb34136ab3e1bc02647f3d8e3824638 Author: Jack Sangdahl Date: Mon, 13 Oct 2025 21:52:01 -0600 challenge 13: ecb cut-and-paste

challenge 12: byte-at-a-time ecb decryption (simple)

2025-10-13T18:36:38Z

commit 4c3995a8afb34136ab3e1bc02647f3d8e3824638 parent 452884f6a66f51ad48d04b8c7a2e94a57643651b Author: Jack Sangdahl Date: Mon, 13 Oct 2025 12:36:38 -0600 challenge 12: byte-at-a-time ecb decryption (simple)

challenge 11: an ecb/cbc detection oracle

2025-10-08T16:48:59Z

commit 452884f6a66f51ad48d04b8c7a2e94a57643651b parent 419e41293a37b19d53da3dd4fd7a37bdce5566cb Author: Jack Sangdahl Date: Wed, 8 Oct 2025 10:48:59 -0600 challenge 11: an ecb/cbc detection oracle

challenge 10: implement cbc mode

2025-10-08T15:08:51Z

commit 419e41293a37b19d53da3dd4fd7a37bdce5566cb parent 8bdc32650426b580fc9972834fa2e3dd067fbe1e Author: Jack Sangdahl Date: Wed, 8 Oct 2025 09:08:51 -0600 challenge 10: implement cbc mode

challenge 9: implement pkcs#7 padding

2025-10-08T04:13:38Z

commit 8bdc32650426b580fc9972834fa2e3dd067fbe1e parent 16c34670eeb091fb40430b3a87b4a0c0b1ffdb99 Author: Jack Sangdahl Date: Tue, 7 Oct 2025 22:13:38 -0600 challenge 9: implement pkcs#7 padding

challenge 8: detect aes in ecb mode

2025-10-07T04:26:38Z

commit 16c34670eeb091fb40430b3a87b4a0c0b1ffdb99 parent d92949e14513c6bca0364492540bc9e22ba186da Author: Jack Sangdahl Date: Mon, 6 Oct 2025 22:26:38 -0600 challenge 8: detect aes in ecb mode

chore: Migrate ECB encryption to openssl 3.0 API

2025-10-07T04:13:28Z

commit d92949e14513c6bca0364492540bc9e22ba186da parent c41dcb673c914e2d755cf53624926a9093477feb Author: Jack Sangdahl Date: Mon, 6 Oct 2025 22:13:28 -0600 chore: Migrate ECB encryption to openssl 3.0 API

challenge 7: aes in ecb mode

2025-10-06T20:03:02Z

commit c41dcb673c914e2d755cf53624926a9093477feb parent 406aa4552a412082f67d3eb20a165c31fa4474d5 Author: Jack Sangdahl Date: Mon, 6 Oct 2025 14:03:02 -0600 challenge 7: aes in ecb mode

challenge 6: break repeating key xor

2025-10-05T02:54:49Z

commit 406aa4552a412082f67d3eb20a165c31fa4474d5 parent 3912bee57a60f9c2cea400325f5e129dae621fab Author: Jack Sangdahl Date: Sat, 4 Oct 2025 20:54:49 -0600 challenge 6: break repeating key xor

challenge 5: implement repeating key xor

2025-10-05T02:03:33Z

commit 3912bee57a60f9c2cea400325f5e129dae621fab parent bdd46ff96d02167e197596336bf8c7b061f4458e Author: Jack Sangdahl Date: Sat, 4 Oct 2025 20:03:33 -0600 challenge 5: implement repeating key xor

challenge 4: detect single-character xor

2025-10-05T01:47:36Z

commit bdd46ff96d02167e197596336bf8c7b061f4458e parent 30d2d1e5ed349664692276dcc538d85d35e30817 Author: Jack Sangdahl Date: Sat, 4 Oct 2025 19:47:36 -0600 challenge 4: detect single-character xor

challenge 3: single-byte xor cipher

2025-09-29T16:19:01Z

commit 30d2d1e5ed349664692276dcc538d85d35e30817 parent 03dd3fff2cc0dc99e3e1483b0da90134fe91d391 Author: Jack Sangdahl Date: Mon, 29 Sep 2025 10:19:01 -0600 challenge 3: single-byte xor cipher

challenge 2: fixed xor

2025-09-29T15:53:01Z

commit 03dd3fff2cc0dc99e3e1483b0da90134fe91d391 parent 40037995c712bf6989e25d68354f45bf22d1173d Author: Jack Sangdahl Date: Mon, 29 Sep 2025 09:53:01 -0600 challenge 2: fixed xor

challenge 1: convert hex to base64

2025-09-29T15:24:52Z

commit 40037995c712bf6989e25d68354f45bf22d1173d Author: Jack Sangdahl Date: Mon, 29 Sep 2025 09:24:52 -0600 challenge 1: convert hex to base64