diff options
| -rw-r--r-- | challenge/ch13.go | 30 | ||||
| -rw-r--r-- | cryptopals.go | 2 |
2 files changed, 32 insertions, 0 deletions
diff --git a/challenge/ch13.go b/challenge/ch13.go new file mode 100644 index 0000000..357a802 --- /dev/null +++ b/challenge/ch13.go @@ -0,0 +1,30 @@ +// Copyright © 2020 rsiddharth <s@ricketyspace.net> +// SPDX-License-Identifier: ISC + +package challenge + +import ( + "fmt" + "ricketyspace.net/cryptopals/lib" +) + +func C13() { + adminBlock := lib.BytesToStr(lib.Pkcs7Padding(lib.StrToBytes("admin"), 16)) + ep := lib.WebProfileFor("foo@abacus" + adminBlock) + encryptedEP := lib.WebEncryptProfile(ep) + adminBlockCipher := encryptedEP[16:32] // Second block in the cipher + + ep = lib.WebProfileFor("foo@abacus") + encryptedEP = lib.WebEncryptProfile(ep) + for i := 0; i < 16; i++ { // Replace last block with the admin cipher block. + encryptedEP[32+i] = adminBlockCipher[i] + } + adminEP := lib.WebDecryptProfile(encryptedEP) + adminProfile := lib.WebDecodeProfile(adminEP) + fmt.Printf("Admin Encoded Profile: %v\n", adminEP) + fmt.Printf("Admin Profile: %v\n", adminProfile) +} + +// Output: +// Admin Encoded Profile: email=foo@abacus&uid=10001&role=admin +// Admin Profile: map[email:foo@abacus role:admin uid:10001] diff --git a/cryptopals.go b/cryptopals.go index 3100115..1ae8c8d 100644 --- a/cryptopals.go +++ b/cryptopals.go @@ -42,5 +42,7 @@ func main() { challenge.C11() case 12: challenge.C12() + case 13: + challenge.C13() } } |