文件列表:

Makefile (1147, 2020-12-02)
src (0, 2020-12-02)
src\main (0, 2020-12-02)
src\main\combinations.cpp (2093, 2020-12-02)
src\main\combinations.h (593, 2020-12-02)
src\main\sha256.cu (4251, 2020-12-02)
src\main\sha256.h (460, 2020-12-02)
src\main\sha256_bf.cu (2333, 2020-12-02)
src\main\utils.cu (891, 2020-12-02)
src\main\utils.h (231, 2020-12-02)
src\test (0, 2020-12-02)
src\test\combinations_test.h (566, 2020-12-02)

# Sha256 This is a Cuda program to crack Java Spring Security passwords created by the deprecated StandardPasswordEncoder class. The digest made by that class generates a password with the following format: ``` salt + sha256_1024_iters(salt + clear_password) ``` The salt has a 8 bytes length. The program uses bruteforce. It has an optimization when generating passwords that generate the passwords with a character repetition limit. Java example of an encoded password using the above class: ``` import org.springframework.security.crypto.password.StandardPasswordEncoder; public class Main { public static void main(String[] args) { StandardPasswordEncoder encoder = new StandardPasswordEncoder(); System.out.println(encoder.encode("hellowor")); } } ``` In the very first version it is able to check 1.9M Hk/s using a 1080 ti GPU. Note that the digest made by StandardPasswordEncoder it is not a simple sha256 digest but it does 1024 digest iterations. # Usage ``` sha256_bf blocks threads charset passlen char_limit target ``` Where: * blocks: number of cuda blocks. * threads: number of cuda threads. * charset: the set of chars to use. * passlen: the len of passwords to generate. * char_limit: maximum number of repetitons of the chars allowed in a passwords. * target: the hex encoded string. Example: ``` ./bin/sha256_bf 1024 *** abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 8 2 e0df6922273d08b24ba4fa4ec2978bca41c937b133e77ec604b1c5c686554b3b824cb7196fbcd0d7 ``` # Build make # Run tests make run_tests

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