Upgrade to Pro — share decks privately, control downloads, hide ads and more …
Sign up for free

80,000 Plaintext Passwords: An Open Source Love...

Avatar for T.J. Schuck T.J. Schuck
June 26, 2014
Programming
1.2k
5

80,000 Plaintext Passwords: An Open Source Love Story in Three Acts

Avatar for T.J. Schuck

T.J. Schuck

June 26, 2014

Other Decks in Programming

See All in Programming
R8 の設定見直しでアプリサイズ削減
Avatar for ANDPAD inc andpad
0
230
気持ちぃ〜角丸 Squircle
Avatar for ryu ryu1013
0
340
AIで開発が速くなった先で、開発チームは何を目指すか
Avatar for Yuki Shiho shihochan
1
1.8k
contenteditable と日本語入力に向き合う
Avatar for taki colorful12
0
220
3回つくってわかった、
定期実行ジョブ基盤の本質情報
Avatar for Naoto Takai takai
4
3k
Findy - エンジニア向け会社紹介/Findy Company Deck
Avatar for Findy findyinc
6
400k
Augmenting AI with the Power of Jakarta EE
Avatar for ivargrimstad ivargrimstad
0
400
[2026-10-09]一枚の布で作らなくてもいい。 信頼性は「パッチワーク」で紡がれる～既存の運用と新しい可能性をつなぎ合わせてきたCREの話～
Avatar for tosite tosite
0
110
Unity6 URPによる海底をテーマにしたVJシステムの解説 | Unity Shader 完全に理解した 勉強会
Avatar for がむ gam0022
0
380
Herb in Rails 8.2: Your ERB views, now HTML-aware @ Kaigi on Rails 2026, Tokyo, Japan
Avatar for Marco Roth marcoroth
2
340
現場と育てるRailsモデリング 〜Spreadsheetから始めたモデル設計〜
Avatar for siroemk siroemk
2
940
우리의 Nitro Modules는 당신의 Turbo Modules보다 아름답다
Avatar for HyunWoo Lee l2hyunwoo
0
200

Featured

See All Featured
Docker and Python
Avatar for Tania Allard trallard
47
4.2k
Music & Morning Musume
Avatar for Bryan Veloso bryan
48
7.5k
Making Projects Easy
Avatar for Brett Harned brettharned
120
6.8k
GitHub's CSS Performance
Avatar for Jon Rohan jonrohan
1033
470k
What the history of the web can teach us about the future of AI
Avatar for Ines Montani inesmontani
PRO
2
750
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
Avatar for Tammy Everts tammyeverts
11
1.1k
Redefining SEO in the New Era of Traffic Generation
Avatar for Szymon Słowik szymonslowik
1
490
Principles of Awesome APIs and How to Build Them.
Avatar for Keavy McMinn keavy
128
18k
Producing Creativity
Avatar for Steve Smith orderedlist
PRO
348
41k
The browser strikes back
Avatar for Jono Alderson jonoalderson
0
1.9k
Bridging the Design Gap: How Collaborative Modelling removes blockers to flow between stakeholders and teams @FastFlow conf
Avatar for Kenny Baas-Schwegler baasie
0
740
The AI Search Optimization Roadmap by Aleyda Solis
Avatar for Aleyda Solis aleyda
2
6.3k

Transcript

  1. 80,000 Plaintext Passwords @tjschuck

  2. Act I

  3. mallory@local$ ′

  4. None

  5. T.J. Schuck
 @tjschuck

  6. HARVEST getHarvest.com

  7. I am not a Security Expert™

  8. mallory@local$ ′

  9. Layers Layers Layers Layers

  10. mallory@local$ perl haxor.pl ′

  11. mallory@local$ perl haxor.pl ! +------+-----------------------+------------+ | id | email |

    password | +------+-----------------------+------------+ | 6125 | [email protected] | honeyd | | 6126 | [email protected] | blowfish | | 6127 | [email protected] | peppercorn | | 6128 | [email protected] | md1947 | +------+-----------------------+------------+

  12. “But…”

  13. mallory@local$ perl haxor.pl ! +------+-----------------------+------------+ | id | email |

    password | +------+-----------------------+------------+ | 6125 | [email protected] | honeyd | | 6126 | [email protected] | blowfish | | 6127 | [email protected] | peppercorn | | 6128 | [email protected] | md1947 | +------+-----------------------+------------+

  14. mallory@local$ perl haxor.pl ! +------+-----------------------+------------+ | id | email |

    password | +------+-----------------------+------------+ | 6125 | [email protected] | ubarlq | | 6126 | [email protected] | oybjsvfu | | 6127 | [email protected] | crccrepbea | | 6128 | [email protected] | zq1947 | +------+-----------------------+------------+

  15. Encryption is reversible

  16. Hashing is irreversible

  17. None

  18. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f

  19. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘secret1234’) => bdfc2db0aa599f5919e565c328216a51

  20. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘secret1234’) => bdfc2db0aa599f5919e565c328216a51 => 18ad6448e70b7b0254cad4d77653f2d7

  21. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘secret1234’) => bdfc2db0aa599f5919e565c328216a51 => 18ad6448e70b7b0254cad4d77653f2d7 ?

  22. Hashing is deterministic

  23. None

  24. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f

  25. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f

  26. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f

  27. Hashing is deterministic (but not obvious)

  28. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f !

  29. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f ! hash(‘Peppercorn’) => b8bfa4f1b72ee60755a71dbdf0700fe9

  30. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f ! hash(‘Peppercorn’) => b8bfa4f1b72ee60755a71dbdf0700fe9

    => b8bfa4f1b72ee60755a71dbdf0700fe8

  31. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f ! hash(‘Peppercorn’) => b8bfa4f1b72ee60755a71dbdf0700fe9

    => b8bfa4f1b72ee60755a71dbdf0700fe8 ?

  32. mallory@local$ perl haxor.pl ! +------+-----------------------+----------------------------------+ | id | email |

    password | +------+-----------------------+----------------------------------+ | 6125 | [email protected] | 6ee717a4bc91d99170ce0d0922ab6c43 | | 6126 | [email protected] | b258a419ddbc13d92b8e7fc25c2b9d6c | | 6127 | [email protected] | 6a58d0ad2619df7d7fabc2603b79063f | | 6128 | [email protected] | 0304432f4c8080781f1b210c6b92b12f | +------+-----------------------+----------------------------------+

  33. Hashing is deterministic

  34. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f

  35. None

  36. Rainbow Tables

  37. mallory@local$ perl haxor.pl ! +------+-----------------------+----------------------------------+ | id | email |

    password | +------+-----------------------+----------------------------------+ | 6125 | [email protected] | 6ee717a4bc91d99170ce0d0922ab6c43 | | 6126 | [email protected] | b258a419ddbc13d92b8e7fc25c2b9d6c | | 6127 | [email protected] | 6a58d0ad2619df7d7fabc2603b79063f | | 6128 | [email protected] | 0304432f4c8080781f1b210c6b92b12f | +------+-----------------------+----------------------------------+
  38. None

  39. 6a58d0ad2619df7d7fabc2603b79063f

  40. None
  41. None

  42. Defeating the Rainbow

  43. hash(‘peppercorn’) => 6a58d0ad2619df7d7fabc2603b79063f

  44. hash(‘peppercorn-tc5gplQopZ617zRQ8h9pAg’) => c5dde1b5cc0e6d89bda0f5e350bda319

  45. None

  46. WE DID IT!

  47. (no we didn’t)

  48. Proof of Concept

  49. peppercorn

  50. pepper8 pepper83 pepper88 pepper99 ! pepperdog pepperi1 peppermint peppermint1 pepperoni

    pepperpepper peppers peppers4 peppi123 peppone pepsi pepsi1 pepsi123 pepsi2006 pepsi5 pepsi78bottle pepsicat pepsico pepsii pepsimax pepsione pepsis12 pequot per12fect peralta1 peppercorn

  51. un1v3r53 1q2w#E$R fkg7h4f3v6

  52. SALTING

  53. SALTING

  54. hash(‘peppercorn-tc5gplQopZ617zRQ8h9pAg’) => c5dde1b5cc0e6d89bda0f5e350bda319 hash(‘peppercorn-R1XrmmZVRedKMTE9nlIy9Q’) => fc5ad4a64796506086424af78f57df9d

  55. mallory@local$ perl haxor.pl ! +------+----------------------------------+------------------------+ | id | password |

    salt | +------+----------------------------------+------------------------+ | 6125 | 5b5f47a49cdd4386611ee0a63577eccd | CeVDwwrT7saa_cY2rV_qng | | 6126 | a50f4854739e10773c99d5576dbb2f73 | rRWjkN4ioELXIPpQ6aDY4w | | 6127 | 94c91484c8bb05113b28f9da2b7ea624 | XvALmgae9uUGmpikd8sohg | | 6128 | 5d2ee837249e9340624b12e653c5e4a3 | D-ZUYoaSadkCze1fPibbgg | +------+----------------------------------+------------------------+

  56. This is pretty good…

  57. This is pretty good… for 1976.

  58. None
  59. None
  60. None
  61. None

  62. bcrypt ✓ One-way hash
 ✓ Pre-image resistant
 ✓ Deterministic ✓

    Built-in per-password salts

  63. Eksblowfish

  64. Adaptive Cost

  65. mallory@local$ perl haxor.pl ! +-----------------------+--------------------------------------------------------------+ | email | password |

    +-----------------------+--------------------------------------------------------------+ | [email protected] | $2a$10$1ObnU/cPb3AjVU5iu8ntfe77xO83roRhoJMyBqYhlq5ZMMbHCcELK | | [email protected] | $2a$10$CelbCnmBjJez5ego4w.mbusfnZGOn/lRhLjrr37R0iUCr1UIC6ZyC | | [email protected] | | | [email protected] | $2a$10$9WLufYmucbh.yaTHKKUuUeihbcA3hBUiI.XiW7ygmaYcYXtl4MBKy | +-----------------------+--------------------------------------------------------------+ $ 2a 10 LrfFlMh6Yc7JWKlpRwVjUuPCOPU5574fXAVrvLZRFT87cT55oLBEe $ $

  66. $ 2a 10 LrfFlMh6Yc7JWKlpRwVjUuPCOPU5574fXAVrvLZRFT87cT55oLBEe $ $

  67. $ 2a 10 LrfFlMh6Yc7JWKlpRwVjUu PCOPU5574fXAVrvLZRFT87cT55oLBEe $ $

  68. $ 2a 10 LrfFlMh6Yc7JWKlpRwVjUu PCOPU5574fXAVrvLZRFT87cT55oLBEe $ $

  69. $ 2a 10 LrfFlMh6Yc7JWKlpRwVjUu PCOPU5574fXAVrvLZRFT87cT55oLBEe $ $

  70. $ 2a 10 LrfFlMh6Yc7JWKlpRwVjUu PCOPU5574fXAVrvLZRFT87cT55oLBEe $ $

  71. $ 2a 10 LrfFlMh6Yc7JWKlpRwVjUu PCOPU5574fXAVrvLZRFT87cT55oLBEe $ $

  72. $ 2a 10 LrfFlMh6Yc7JWKlpRwVjUu PCOPU5574fXAVrvLZRFT87cT55oLBEe $ $ “Cost”

  73. None

  74. bcrypt(‘peppercorn’, 10) =>

  75. bcrypt(‘peppercorn’, 10) => $2a$10$41JmpddjOSEGWU099uQx7O7Y1EiQMTRQFZCcFqFMlYWekR5pj9xFi

  76. bcrypt(‘peppercorn’, 10) => $2a$10$41JmpddjOSEGWU099uQx7O7Y1EiQMTRQFZCcFqFMlYWekR5pj9xFi bcrypt(‘peppercorn’, 10) =>

  77. bcrypt(‘peppercorn’, 10) => $2a$10$41JmpddjOSEGWU099uQx7O7Y1EiQMTRQFZCcFqFMlYWekR5pj9xFi bcrypt(‘peppercorn’, 10) => $2a$10$8ONmT2oiKPoPn/KQTrvHq.gWTnqQ5p.T13lw.lCm9d.QoqIZzbHPS

  78. bcrypt(‘peppercorn’, 10) => $2a$10$41JmpddjOSEGWU099uQx7O7Y1EiQMTRQFZCcFqFMlYWekR5pj9xFi bcrypt(‘peppercorn’, 10) => $2a$10$8ONmT2oiKPoPn/KQTrvHq.gWTnqQ5p.T13lw.lCm9d.QoqIZzbHPS bcrypt(‘peppercorn’, 14)

    =>

  79. bcrypt(‘peppercorn’, 10) => $2a$10$41JmpddjOSEGWU099uQx7O7Y1EiQMTRQFZCcFqFMlYWekR5pj9xFi bcrypt(‘peppercorn’, 10) => $2a$10$8ONmT2oiKPoPn/KQTrvHq.gWTnqQ5p.T13lw.lCm9d.QoqIZzbHPS bcrypt(‘peppercorn’, 14)

    => $2a$14$4US.NV/qyRkctl.LaYvNzOln70yIaqGfJeMq1deb/bPJMMmtcxOU.

  80. bcrypt(‘peppercorn’, 10) => $2a$10$41JmpddjOSEGWU099uQx7O7Y1EiQMTRQFZCcFqFMlYWekR5pj9xFi bcrypt(‘peppercorn’, 10) => $2a$10$8ONmT2oiKPoPn/KQTrvHq.gWTnqQ5p.T13lw.lCm9d.QoqIZzbHPS bcrypt(‘peppercorn’, 14)

    => $2a$14$4US.NV/qyRkctl.LaYvNzOln70yIaqGfJeMq1deb/bPJMMmtcxOU.

  81. bcrypt(‘peppercorn’, 10) => $2a$10$41JmpddjOSEGWU099uQx7O7Y1EiQMTRQFZCcFqFMlYWekR5pj9xFi bcrypt(‘peppercorn’, 10) => $2a$10$8ONmT2oiKPoPn/KQTrvHq.gWTnqQ5p.T13lw.lCm9d.QoqIZzbHPS bcrypt(‘peppercorn’, 14)

    => $2a$14$4US.NV/qyRkctl.LaYvNzOln70yIaqGfJeMq1deb/bPJMMmtcxOU. 0.0656 seconds

  82. bcrypt(‘peppercorn’, 10) => $2a$10$41JmpddjOSEGWU099uQx7O7Y1EiQMTRQFZCcFqFMlYWekR5pj9xFi bcrypt(‘peppercorn’, 10) => $2a$10$8ONmT2oiKPoPn/KQTrvHq.gWTnqQ5p.T13lw.lCm9d.QoqIZzbHPS bcrypt(‘peppercorn’, 14)

    => $2a$14$4US.NV/qyRkctl.LaYvNzOln70yIaqGfJeMq1deb/bPJMMmtcxOU. 0.0656 seconds 0.0657 seconds

  83. bcrypt(‘peppercorn’, 10) => $2a$10$41JmpddjOSEGWU099uQx7O7Y1EiQMTRQFZCcFqFMlYWekR5pj9xFi bcrypt(‘peppercorn’, 10) => $2a$10$8ONmT2oiKPoPn/KQTrvHq.gWTnqQ5p.T13lw.lCm9d.QoqIZzbHPS bcrypt(‘peppercorn’, 14)

    => $2a$14$4US.NV/qyRkctl.LaYvNzOln70yIaqGfJeMq1deb/bPJMMmtcxOU. 0.0656 seconds 0.0657 seconds 1.0481 seconds

  84. Cost Seconds 9 0.0344 10 0.0656 11 0.1333 12 0.2646

    13 0.5236 14 1.0481 15 2.1645 16 4.2801

  85. “Well, actually…”

  86. The Fix

  87. def authenticate(plaintext_password)! if old_hashing_method(plaintext_password) == password_digest! self! end! end

  88. def authenticate(plaintext_password)! if BCrypt::Password.new(password_digest) == plaintext_password! self! end! end

  89. def authenticate(plaintext_password)! return unless convert_old_hash_to_bcrypt(plaintext_password)! ! if BCrypt::Password.new(password_digest) == plaintext_password!

    self! end! end

  90. def convert_old_hash_to_bcrypt(plaintext_password)! return true if BCrypt::Password.valid_hash?(password_digest)! ! if old_hashing_method(plaintext_password) ==

    password_digest! update_column :password_digest,! BCrypt::Password.create(plaintext_password)! end! end
  91. None
  92. None
  93. None

  94. —Act II—

  95. Fat Binary Gems —Act II— You make the rockin’ world

    go ’round

  96. bcrypt-ruby github.com/codahale/bcrypt-ruby

  97. None
  98. None
  99. None
  100. None
  101. None
  102. None
  103. None
  104. None
  105. None
  106. None
  107. None
  108. None
  109. None
  110. None

  111. Well shit.

  112. None
  113. None

  114. rake-compiler-dev-box with Rubies, GCC, JDK, MinGW…

  115. None

  116. LOLOLOLOL NO.

  117. None

  118. rake-compiler#79

  119. Act III

  120. Act III Luis Lavena

  121. None

  122. • One-Click Ruby
 Installer for Windows

  123. • One-Click Ruby
 Installer for Windows • Ruby core

  124. • One-Click Ruby
 Installer for Windows • Ruby core •

    Ruby Hero (2010)

  125. • One-Click Ruby
 Installer for Windows • Ruby core •

    Ruby Hero (2010) • rake-compiler

  126. rake-compiler-dev-box#2

  127. None
  128. None
  129. None
  130. None
  131. None

  132. @luislavena <3 <3 <3

  133. Find your Luis

  134. “Be the Luis you wish to see in the world”

  135. What have we learned?

  136. 1. Just use bcrypt

  137. 2. Distribute a dev box

  138. 3. Release, collaborate, iterate

  139. Thank You @tjschuck getHarvest.com