diff options
| author | rsiddharth <s@ricketyspace.net> | 2020-12-08 17:59:28 -0500 |
|---|---|---|
| committer | rsiddharth <s@ricketyspace.net> | 2020-12-08 17:59:28 -0500 |
| commit | dc6cca42113ea7e9a292175e1704061d742014dd (patch) | |
| tree | 3b5e2ee16b74a745f70fbb0f0daf3de4101f4fbd /challenge | |
| parent | 7b29de2661a0a1e59d816544b7176b4ec8201468 (diff) | |
lib/blocks: move isECB from ch. 8 in here as BlockIsECB
Diffstat (limited to 'challenge')
| -rw-r--r-- | challenge/c08.go | 25 |
1 files changed, 1 insertions, 24 deletions
diff --git a/challenge/c08.go b/challenge/c08.go index 862c070..1f43b45 100644 --- a/challenge/c08.go +++ b/challenge/c08.go @@ -12,7 +12,7 @@ func C8() { for i := 0; i < len(c08); i++ { bs := lib.HexStrToBytes(c08[i]) - block := isECB(bs) + block := lib.BlockIsECB(bs) if block != nil { fmt.Printf("Cipher at line %d (%s)", i+1, c08[i]) fmt.Printf(" might be AES encrypted in ECB mode.\n") @@ -27,29 +27,6 @@ func C8() { // Cipher at line 133 (d880619740a8a19b7840a8a31c810a3d08649af70dc06f4fd5d2d69c744cd283e2dd052f6b641dbf9d11b0348542bb5708649af70dc06f4fd5d2d69c744cd2839475c9dfdbc1d46597949d9c7e82bf5a08649af70dc06f4fd5d2d69c744cd28397a93eab8d6aecd566489154789a6b0308649af70dc06f4fd5d2d69c744cd283d403180c98c8f6db1f2a3f9c4040deb0ab51b29933f2c123c58386b06fba186a) might be AES encrypted in ECB mode. // 16-byte block '08649af70dc06f4fd5d2d69c744cd283' occurs more than once in this cipher. -func isECB(bs []byte) []byte { - blocks := lib.BreakIntoBlocks(bs, 16) - - for i := 0; i < len(blocks); i++ { - if hasMatchingBlock(i, blocks) { - return blocks[i] - } - } - return nil -} - -func hasMatchingBlock(id int, blocks [][]byte) bool { - for i := 0; i < len(blocks); i++ { - if i == id { - continue - } - if lib.BlocksEqual(blocks[i], blocks[id]) { - return true - } - } - return false -} - var c08 = []string{ "8a10247f90d0a05538888ad6205882196f5f6d05c21ec8dca0cb0be02c3f8b09e382963f443aa514daa501257b09a36bf8c4c392d8ca1bf4395f0d5f2542148c7e5ff22237969874bf66cb85357ef99956accf13ba1af36ca7a91a50533c4d89b7353f908c5a166774293b0bf6247391df69c87dacc4125a99ec417221b58170e633381e3847c6b1c28dda2913c011e13fc4406f8fe73bbf78e803e1d995ce4d", "bd20aad820c9e387ea57408566e5844c1e470e9d6fbbdba3a6b4df1dd85bce2208f1944f1827d015df9c46c22803f41d1052acb721977f0ccc13db95c970252091ea5e36e423ee6a2f2d12ef909fcadd42529885d221af1225e32161b85e6dc03465cf398c937846b18bac05e88820a567caac113762753dffbe6ece09823bab5aee947a682bb3156f42df1d8dc320a897ee79981cf937390b4ae93eb8657f6c", |