Generating Rsa Private Key 2048 Bit Long Modulus

Posted By admin On 15.12.20

Mar 20, 2019  Generate private key as private.pem openssl genrsa -out private.pem 2048 Generating RSA private key, 2048 bit long modulus. Generating RSA private key, 2048 bit long modulus. e is 65537 (0x10001) This step is required only when your server private key is not in PKCS#8 format. Convert the private key to PKCS#8 format. When prompted, provide a secure password of your choice for the encryption.

  1. Crack 2048 Bit Rsa Key
  2. Generating Rsa Private Key 2048 Bit Long Modulus Video
  3. Generate Rsa 2048 Bit Key
  • The largest private RSA key modulus is 4096 bits. Therefore, the largest RSA private key a router may generate or import is 4096 bits. However, RFC 2409 restricts the private key size to 2048 bits or less for RSA encryption. The recommended modulus for a CA is 2048 bits; the recommended modulus for a client is 2048 bits.
  • Generating RSA private key, 2048 bit long modulus e is 65537 ( 0x10001 ) The above command will generate SSL key using ‘-rand’ option with few big files for sources and 2048 encryption.
  • Timing Key Generation. To dispel this myth I used two scenarios: Windows Server 2012 Active Directory Certificate Services generating a 2048-bit RSA key for a self-signed certificate. This is on a single-CPU server with 2048MB of RAM running inside VMware. OpenSSL generating a similar 2048-bit RSA key on an Intel i7 3.6Ghz with 32MB of RAM.
  • Create and sign an X509 certificate. You need to create an RSA private key to create your certificate signing request (CSR). ec2-user@ip-255-55-55-255 $ openssl genrsa 2048 privatekey.pem Generating RSA private key, 2048 bit long modulus.
  • The size of a RSA key is expressed in bits, not bytes. 2048 bits are 256 bytes. A bare-bone RSA private key consists in two integers, the modulus (a big composite integer, its length in bits is the 'RSA key length') and the private exponent (another big integer, which normally has the same size than the modulus).

Connecting via SSH is essential in today’s networks. Cisco devices are not automatically capable to use SSH. It has to be enabled and configured. SSH (Secure Shell) is a secure method to remote access network devices as it includes both authentication and encryption. To configure SSH you will need an IOS image that supports crypto features.

This lab is a basic SSH configuration. I will be using a Ubuntu 18.04 image as a workstation to connect to the router.

When configuring SSH on a Cisco router you will need to make sure the router has a host name. It will also need a domain name. An RSA key will need to be generated, user will need to be created on the Cisco router and finally after SSH is enabled you will need to configure the VTY lines to allow the connection to occur.

Task 1:
Configure the host name on the router.

Task 2:
Configure a domain name.

Task 3:
Generate a RSA key. I recommend 2048 or greater when configuring the modulus bits. Make sure you use SSH version 2.

Task 4:
Create a user with a password and an enable password. Make sure you use your own password and that you follow your companies security policies when creating a user account.

Task 5:
Now that SSH is enabled we need to configure the VTY lines to allow the SSH connection through.

Task 6:
Configure the ip address of the LAN connection of the router.

Once the configuration is complete, now we need to test. I am using an Ubuntu 18.04 image. In this lab the most important part is to configure the device to be on the same network. In reality, SSH will work when connecting from an outside network so long as the device has a route to the network device and that it is not blocked from an ACL or Firewall.
To configure a static IP address in Ubuntu 18.04, we will need to identify the physical named interface on the device. To find out the proper name type “ip addr“. Once identified in my case its ens3, Enter the following command to statically configure the IP address “sudo ip addr add 192.168.14.25/26 dev ens3“. To configure the gateway enter the following command “sudo ip route add default via 192.168.14.62“.

Crack 2048 Bit Rsa Key

Ping the gateway to confirm the device can ping the router.

Generating Rsa Private Key 2048 Bit Long Modulus Video

Finally let’s test the SSH connection by typing “ssh admin@192.168.14.62“. Type in the user’s password when requested, and the enable password as well. Congratulations you have configured and connected to a router via SSH.

Generate Rsa 2048 Bit Key

  1. ....................................+++
  2. e is 65537(0x10001)
  3. .........................................................+++
  4. e is 65537(0x10001)
  5. subject=/C=DE/ST=BW/L=Stuttgart/O=Dummy Authority/CN=localhost
  6. frk-00027-00027 10:25:14.596011[ forkit ] ERR Ignored setting RLIMIT_FSIZE to 18446744073709551615 bytes. (errno: Success) common/Seccomp.cpp:284
  7. frk-00027-00027 10:25:14.596379[ forkit ] ERR Ignored setting RLIMIT_NOFILE to 18446744073709551615 files. (errno: Success) common/Seccomp.cpp:306
  8. frk-00027-00027 10:25:14.596705[ forkit ] FTL Capability cap_sys_chroot is not setfor the loolforkit program. kit/ForKit.cpp:168
  9. frk-00027-00027 10:25:14.597035[ forkit ] FTL Capability cap_mknod is not setfor the loolforkit program. kit/ForKit.cpp:168
  10. frk-00027-00027 10:25:14.597251[ forkit ] FTL Capability cap_fowner is not setfor the loolforkit program. kit/ForKit.cpp:168
  11. FATAL: Capabilities are not setfor the loolforkit program.
  12. If you are on SLES11, please set'file_caps=1'as kernel boot option.
  13. wsd-00025-00025 10:29:24.555553[ loolwsd ] FTL Failed to fork child processes. wsd/LOOLWSD.cpp:2623
  14. wsd-00025-00025 10:29:24.555915[ loolwsd ] FTL Failed to fork child processes. wsd/LOOLWSD.cpp:2770
  15. wsd-00025-00025 10:29:24.556188[ loolwsd ] WRN Waking up dead poll thread [admin], started: false, finished: false ./net/Socket.hpp:507
  16. wsd-00025-00025 10:29:24.556231[ loolwsd ] WRN Waking up dead poll thread [admin], started: false, finished: false ./net/Socket.hpp:507
  17. <shutdown>-00025 10:29:24.556636[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  18. <shutdown>-00025 10:29:24.556656[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  19. <shutdown>-00025 10:29:24.556664[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  20. <shutdown>-00025 10:29:24.556672[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  21. <shutdown>-00025 10:29:24.556679[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  22. <shutdown>-00025 10:29:24.556685[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  23. <shutdown>-00025 10:29:24.557371[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  24. <shutdown>-00025 10:29:24.557449[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  25. ......................+++
  26. e is 65537(0x10001)
  27. ........................+++
  28. e is 65537(0x10001)
  29. subject=/C=DE/ST=BW/L=Stuttgart/O=Dummy Authority/CN=localhost
  30. frk-00027-00027 10:29:25.417678[ forkit ] ERR Ignored setting RLIMIT_FSIZE to 18446744073709551615 bytes. (errno: Success) common/Seccomp.cpp:284
  31. frk-00027-00027 10:29:25.417960[ forkit ] ERR Ignored setting RLIMIT_NOFILE to 18446744073709551615 files. (errno: Success) common/Seccomp.cpp:306
  32. frk-00027-00027 10:29:25.418305[ forkit ] FTL Capability cap_sys_chroot is not setfor the loolforkit program. kit/ForKit.cpp:168
  33. frk-00027-00027 10:29:25.418545[ forkit ] FTL Capability cap_mknod is not setfor the loolforkit program. kit/ForKit.cpp:168
  34. frk-00027-00027 10:29:25.418761[ forkit ] FTL Capability cap_fowner is not setfor the loolforkit program. kit/ForKit.cpp:168
  35. FATAL: Capabilities are not setfor the loolforkit program.
  36. If you are on SLES11, please set'file_caps=1'as kernel boot option.
  37. wsd-00025-00025 10:33:35.403531[ loolwsd ] FTL Failed to fork child processes. wsd/LOOLWSD.cpp:2623
  38. wsd-00025-00025 10:33:35.403910[ loolwsd ] FTL Failed to fork child processes. wsd/LOOLWSD.cpp:2770
  39. wsd-00025-00025 10:33:35.404195[ loolwsd ] WRN Waking up dead poll thread [admin], started: false, finished: false ./net/Socket.hpp:507
  40. wsd-00025-00025 10:33:35.404230[ loolwsd ] WRN Waking up dead poll thread [admin], started: false, finished: false ./net/Socket.hpp:507
  41. <shutdown>-00025 10:33:35.404686[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  42. <shutdown>-00025 10:33:35.404705[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  43. <shutdown>-00025 10:33:35.404713[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  44. <shutdown>-00025 10:33:35.404726[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  45. <shutdown>-00025 10:33:35.404735[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  46. <shutdown>-00025 10:33:35.404741[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  47. <shutdown>-00025 10:33:35.405073[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  48. <shutdown>-00025 10:33:35.405091[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  49. ..........................................................................................................................+++
  50. e is 65537(0x10001)
  51. ..................................+++
  52. e is 65537(0x10001)
  53. subject=/C=DE/ST=BW/L=Stuttgart/O=Dummy Authority/CN=localhost
  54. frk-00027-00027 10:33:36.485060[ forkit ] ERR Ignored setting RLIMIT_FSIZE to 18446744073709551615 bytes. (errno: Success) common/Seccomp.cpp:284
  55. frk-00027-00027 10:33:36.485366[ forkit ] ERR Ignored setting RLIMIT_NOFILE to 18446744073709551615 files. (errno: Success) common/Seccomp.cpp:306
  56. frk-00027-00027 10:33:36.485700[ forkit ] FTL Capability cap_sys_chroot is not setfor the loolforkit program. kit/ForKit.cpp:168
  57. frk-00027-00027 10:33:36.485944[ forkit ] FTL Capability cap_mknod is not setfor the loolforkit program. kit/ForKit.cpp:168
  58. frk-00027-00027 10:33:36.486160[ forkit ] FTL Capability cap_fowner is not setfor the loolforkit program. kit/ForKit.cpp:168
  59. FATAL: Capabilities are not setfor the loolforkit program.
  60. If you are on SLES11, please set'file_caps=1'as kernel boot option.
  61. wsd-00025-00025 10:37:46.470347[ loolwsd ] FTL Failed to fork child processes. wsd/LOOLWSD.cpp:2623
  62. wsd-00025-00025 10:37:46.471022[ loolwsd ] FTL Failed to fork child processes. wsd/LOOLWSD.cpp:2770
  63. wsd-00025-00025 10:37:46.471422[ loolwsd ] WRN Waking up dead poll thread [admin], started: false, finished: false ./net/Socket.hpp:507
  64. wsd-00025-00025 10:37:46.471465[ loolwsd ] WRN Waking up dead poll thread [admin], started: false, finished: false ./net/Socket.hpp:507
  65. <shutdown>-00025 10:37:46.471947[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  66. <shutdown>-00025 10:37:46.471964[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  67. <shutdown>-00025 10:37:46.471972[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  68. <shutdown>-00025 10:37:46.471980[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  69. <shutdown>-00025 10:37:46.471987[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  70. <shutdown>-00025 10:37:46.471994[ loolwsd ] WRN Waking up dead poll thread [accept_poll], started: false, finished: false ./net/Socket.hpp:507
  71. <shutdown>-00025 10:37:46.472666[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  72. <shutdown>-00025 10:37:46.472688[ loolwsd ] WRN Waking up dead poll thread [websrv_poll], started: false, finished: false ./net/Socket.hpp:507
  73. ................+++
  74. ....................................................................................................................................................................................................................................+++
  75. Generating RSA private key, 2048 bit long modulus
  76. ........................................................+++
  77. Signature ok
  78. subject=/C=DE/ST=BW/L=Stuttgart/O=Dummy Authority/CN=localhost
  79. frk-00027-00027 10:37:47.767191[ forkit ] ERR Ignored setting RLIMIT_FSIZE to 18446744073709551615 bytes. (errno: Success) common/Seccomp.cpp:284
  80. frk-00027-00027 10:37:47.767481[ forkit ] ERR Ignored setting RLIMIT_NOFILE to 18446744073709551615 files. (errno: Success) common/Seccomp.cpp:306
  81. frk-00027-00027 10:37:47.767780[ forkit ] FTL Capability cap_sys_chroot is not setfor the loolforkit program. kit/ForKit.cpp:168
  82. frk-00027-00027 10:37:47.768066[ forkit ] FTL Capability cap_mknod is not setfor the loolforkit program. kit/ForKit.cpp:168
  83. frk-00027-00027 10:37:47.768264[ forkit ] FTL Capability cap_fowner is not setfor the loolforkit program. kit/ForKit.cpp:168
  84. FATAL: Capabilities are not setfor the loolforkit program.
  85. If you are on SLES11, please set'file_caps=1'as kernel boot option.