root@localhost$

root@localhost$

total 2 -rw-r----- 1 root root 1526 Dec 11 11:58 VaultDoor6.java root@localhost$

import java.util.*; class VaultDoor6 { public static void main(String args[]) { VaultDoor6 vaultDoor = new VaultDoor6(); Scanner scanner = new Scanner(System.in); System.out.print("Enter vault password: "); String userInput = scanner.next(); String input = userInput.substring("picoCTF{".length(),userInput.length()-1); if (vaultDoor.checkPassword(input)) { System.out.println("Access granted."); } else { System.out.println("Access denied!"); } } // Dr. Evil gave me a book called Applied Cryptography by Bruce Schneier, // and I learned this really cool encryption system. This will be the // strongest vault door in Dr. Evil's entire evil volcano compound for sure! // Well, I didn't exactly read the *whole* book, but I'm sure there's // nothing important in the last 750 pages. // // -Minion #3091 public boolean checkPassword(String password) { if (password.length() != 32) { return false; } byte[] passBytes = password.getBytes(); byte[] myBytes = { 0x3b, 0x65, 0x21, 0xa , 0x38, 0x0 , 0x36, 0x1d, 0xa , 0x3d, 0x61, 0x27, 0x11, 0x66, 0x27, 0xa , 0x21, 0x1d, 0x61, 0x3b, 0xa , 0x2d, 0x65, 0x27, 0xa , 0x6c, 0x61, 0x6d, 0x37, 0x6d, 0x6d, 0x6d, }; for (int i=0; i<32; i++) { if (((passBytes[i] ^ 0x55) - myBytes[i]) != 0) { return false; } } return true; } } root@localhost$

bash: python: command not found root@localhost$

Requirement already satisfied: pip in /usr/lib/python3/dist-packages (22.0.2) WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x78f2325b1570>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/pip/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x78f2325b1780>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/pip/

WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip. Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue. To avoid this problem you can invoke Python with '-m pip' instead of running pip directly. WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x79b664aa5690>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/python3/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x79b664aa59c0>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/python3/

Requirement already satisfied: pip in /usr/lib/python3/dist-packages (22.0.2) WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7b0cb4a95a80>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/pip/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7b0cb4a95c90>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/pip/

Requirement already satisfied: pip in /usr/lib/python3/dist-packages (22.0.2) WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x799f8b3757b0>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/pip/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x799f8b3759c0>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/pip/

WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip. Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue. To avoid this problem you can invoke Python with '-m pip' instead of running pip directly. WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x78fe16539270>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/python3/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x78fe165395a0>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/python3/

Requirement already satisfied: pip in /usr/lib/python3/dist-packages (22.0.2) WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7decf3b69840>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/pip/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7decf3b69a50>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/pip/

WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip. Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue. To avoid this problem you can invoke Python with '-m pip' instead of running pip directly. WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7db6f08c5390>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/python3/ WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7db6f08c56c0>: Failed to establish a new connection: [Errno 101] Network is unreachable')': /simple/python3/

n0t_mUcH_h4rD3r_tH4n_x0r_948b888 root@localhost$

bash: javac: command not found root@localhost$

Reading package lists... 0% Reading package lists... 0% Reading package lists... 0% Reading package lists... 5% Reading package lists... 5% Reading package lists... 6% Reading package lists... 6% Reading package lists... 58% Reading package lists... 63% Reading package lists... 63% Reading package lists... 64% Reading package lists... 64% Reading package lists... 70% Reading package lists... 70% Reading package lists... 77% Reading package lists... 77% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 83% Reading package lists... 83% Reading package lists... 88% Reading package lists... 88% Reading package lists... 94% Reading package lists... 94% Reading package lists... 99% Reading package lists... 99% Reading package lists... 99% Reading package lists... 99% Reading package lists... Done Building dependency tree... 0% Building dependency tree... 0% Building dependency tree... 50% Building dependency tree... 50% Building dependency tree... 90% Building dependency tree... Done Reading state information... 0% Reading state information... 0% Reading state information... Done The following additional packages will be installed: alsa-topology-conf alsa-ucm-conf ca-certificates-java fonts-dejavu-extra java-common libasound2 libasound2-data libatk-wrapper-java libatk-wrapper-java-jni libfontenc1 libgif7 libice-dev libpcsclite1 libpthread-stubs0-dev libsm-dev libx11-dev libxau-dev libxaw7 libxcb1-dev libxdmcp-dev libxkbfile1 libxmu6 libxt-dev libxt6 libxv1 libxxf86dga1 openjdk-18-jdk-headless openjdk-18-jre openjdk-18-jre-headless x11-utils x11proto-dev xorg-sgml-doctools xtrans-dev Suggested packages: default-jre libasound2-plugins alsa-utils libice-doc pcscd libsm-doc libx11-doc libxcb-doc libxt-doc openjdk-18-demo openjdk-18-source visualvm libnss-mdns fonts-ipafont-gothic fonts-ipafont-mincho fonts-wqy-microhei | fonts-wqy-zenhei fonts-indic mesa-utils The following NEW packages will be installed: alsa-topology-conf alsa-ucm-conf ca-certificates-java fonts-dejavu-extra java-common libasound2 libasound2-data libatk-wrapper-java libatk-wrapper-java-jni libfontenc1 libgif7 libice-dev libpcsclite1 libpthread-stubs0-dev libsm-dev libx11-dev libxau-dev libxaw7 libxcb1-dev libxdmcp-dev libxkbfile1 libxmu6 libxt-dev libxt6 libxv1 libxxf86dga1 openjdk-18-jdk openjdk-18-jdk-headless openjdk-18-jre openjdk-18-jre-headless x11-utils x11proto-dev xorg-sgml-doctools xtrans-dev 0 upgraded, 34 newly installed, 0 to remove and 25 not upgraded. Need to get 278 MB of archives. After this operation, 446 MB of additional disk space will be used. Do you want to continue? [Y/n]

Abort. root@localhost$

bash: javac: command not found root@localhost$

Reading package lists... 0% Reading package lists... 0% Reading package lists... 0% Reading package lists... 5% Reading package lists... 5% Reading package lists... 6% Reading package lists... 6% Reading package lists... 61% Reading package lists... 63% Reading package lists... 63% Reading package lists... 64% Reading package lists... 64% Reading package lists... 70% Reading package lists... 70% Reading package lists... 77% Reading package lists... 77% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 83% Reading package lists... 83% Reading package lists... 88% Reading package lists... 88% Reading package lists... 94% Reading package lists... 94% Reading package lists... 99% Reading package lists... 99% Reading package lists... 99% Reading package lists... 99% Reading package lists... Done Building dependency tree... 0% Building dependency tree... 0% Building dependency tree... 50% Building dependency tree... 50% Building dependency tree... 83% Building dependency tree... Done Reading state information... 0% Reading state information... 0% Reading state information... Done The following additional packages will be installed: alsa-topology-conf alsa-ucm-conf ca-certificates-java fonts-dejavu-extra java-common libasound2 libasound2-data libatk-wrapper-java libatk-wrapper-java-jni libfontenc1 libgif7 libice-dev libpcsclite1 libpthread-stubs0-dev libsm-dev libx11-dev libxau-dev libxaw7 libxcb1-dev libxdmcp-dev libxkbfile1 libxmu6 libxt-dev libxt6 libxv1 libxxf86dga1 openjdk-18-jdk-headless openjdk-18-jre openjdk-18-jre-headless x11-utils x11proto-dev xorg-sgml-doctools xtrans-dev Suggested packages: default-jre libasound2-plugins alsa-utils libice-doc pcscd libsm-doc libx11-doc libxcb-doc libxt-doc openjdk-18-demo openjdk-18-source visualvm libnss-mdns fonts-ipafont-gothic fonts-ipafont-mincho fonts-wqy-microhei | fonts-wqy-zenhei fonts-indic mesa-utils The following NEW packages will be installed: alsa-topology-conf alsa-ucm-conf ca-certificates-java fonts-dejavu-extra java-common libasound2 libasound2-data libatk-wrapper-java libatk-wrapper-java-jni libfontenc1 libgif7 libice-dev libpcsclite1 libpthread-stubs0-dev libsm-dev libx11-dev libxau-dev libxaw7 libxcb1-dev libxdmcp-dev libxkbfile1 libxmu6 libxt-dev libxt6 libxv1 libxxf86dga1 openjdk-18-jdk openjdk-18-jdk-headless openjdk-18-jre openjdk-18-jre-headless x11-utils x11proto-dev xorg-sgml-doctools xtrans-dev 0 upgraded, 34 newly installed, 0 to remove and 25 not upgraded. Need to get 278 MB of archives. After this operation, 446 MB of additional disk space will be used. Do you want to continue? [Y/n]

Abort. root@localhost$

bash: javac: command not found root@localhost$

Reading package lists... 0% Reading package lists... 0% Reading package lists... 0% Reading package lists... 5% Reading package lists... 5% Reading package lists... 6% Reading package lists... 6% Reading package lists... 40% Reading package lists... 63% Reading package lists... 63% Reading package lists... 64% Reading package lists... 64% Reading package lists... 70% Reading package lists... 70% Reading package lists... 77% Reading package lists... 77% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 82% Reading package lists... 83% Reading package lists... 83% Reading package lists... 88% Reading package lists... 88% Reading package lists... 94% Reading package lists... 94% Reading package lists... 94% Reading package lists... 99% Reading package lists... 99% Reading package lists... 99% Reading package lists... 99% Reading package lists... Done Building dependency tree... 0% Building dependency tree... 0% Building dependency tree... 50% Building dependency tree... 50% Building dependency tree... Done Reading state information... 0% Reading state information... 0% Reading state information... Done The following additional packages will be installed: alsa-topology-conf alsa-ucm-conf ca-certificates-java fonts-dejavu-extra java-common libasound2 libasound2-data libatk-wrapper-java libatk-wrapper-java-jni libfontenc1 libgif7 libice-dev libpcsclite1 libpthread-stubs0-dev libsm-dev libx11-dev libxau-dev libxaw7 libxcb1-dev libxdmcp-dev libxkbfile1 libxmu6 libxt-dev libxt6 libxv1 libxxf86dga1 openjdk-18-jdk-headless openjdk-18-jre openjdk-18-jre-headless x11-utils x11proto-dev xorg-sgml-doctools xtrans-dev Suggested packages: default-jre libasound2-plugins alsa-utils libice-doc pcscd libsm-doc libx11-doc libxcb-doc libxt-doc openjdk-18-demo openjdk-18-source visualvm libnss-mdns fonts-ipafont-gothic fonts-ipafont-mincho fonts-wqy-microhei | fonts-wqy-zenhei fonts-indic mesa-utils The following NEW packages will be installed: alsa-topology-conf alsa-ucm-conf ca-certificates-java fonts-dejavu-extra java-common libasound2 libasound2-data libatk-wrapper-java libatk-wrapper-java-jni libfontenc1 libgif7 libice-dev libpcsclite1 libpthread-stubs0-dev libsm-dev libx11-dev libxau-dev libxaw7 libxcb1-dev libxdmcp-dev libxkbfile1 libxmu6 libxt-dev libxt6 libxv1 libxxf86dga1 openjdk-18-jdk openjdk-18-jdk-headless openjdk-18-jre openjdk-18-jre-headless x11-utils x11proto-dev xorg-sgml-doctools xtrans-dev 0 upgraded, 34 newly installed, 0 to remove and 25 not upgraded. Need to get 278 MB of archives. After this operation, 446 MB of additional disk space will be used. Do you want to continue? [Y/n]

Abort. root@localhost$