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| author | Amaury Pouly <amaury.pouly@gmail.com> | 2013-02-16 20:47:07 +0100 |
|---|---|---|
| committer | Amaury Pouly <amaury.pouly@gmail.com> | 2013-02-16 20:49:07 +0100 |
| commit | b05b762ed45c6c8967fce098c598ec1a6ed7a533 (patch) | |
| tree | ca704d48a3ac5acd8097d8485208f2f328766650 /utils/imxtools/sbtools/crypto.h | |
| parent | 4db4985f21bd8f36533f8e71db916e6d3d5d2249 (diff) | |
| download | rockbox-b05b762ed45c6c8967fce098c598ec1a6ed7a533.tar.gz rockbox-b05b762ed45c6c8967fce098c598ec1a6ed7a533.zip | |
sbtools: add brute force option for sb1 in sbtoelf
After some reverse engineering, it appears that the keys of the
sb1 format are very weak: the 128 bytes are generated from the
laserfuse words 4,5 and 6 but in a weird manner: 4 and 5 are
simply ORed and 6 is only half used (somehow), making it "only" a
48 bit word to find.
Change-Id: I40702e19d0924ef51c01894efce3cb65bd664456
Diffstat (limited to 'utils/imxtools/sbtools/crypto.h')
| -rw-r--r-- | utils/imxtools/sbtools/crypto.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/utils/imxtools/sbtools/crypto.h b/utils/imxtools/sbtools/crypto.h index 599ebf4bf4..6751c2e861 100644 --- a/utils/imxtools/sbtools/crypto.h +++ b/utils/imxtools/sbtools/crypto.h | |||
| @@ -125,5 +125,6 @@ void sha_1_output(struct sha_1_params_t *params, byte *out); | |||
| 125 | // WARNING those functions modifies the keys !! | 125 | // WARNING those functions modifies the keys !! |
| 126 | uint32_t xor_encrypt(union xorcrypt_key_t keys[2], void *data, int size); | 126 | uint32_t xor_encrypt(union xorcrypt_key_t keys[2], void *data, int size); |
| 127 | uint32_t xor_decrypt(union xorcrypt_key_t keys[2], void *data, int size); | 127 | uint32_t xor_decrypt(union xorcrypt_key_t keys[2], void *data, int size); |
| 128 | void xor_generate_key(uint32_t laserfuse[3], union xorcrypt_key_t key[2]); | ||
| 128 | 129 | ||
| 129 | #endif /* __CRYPTO_H__ */ | 130 | #endif /* __CRYPTO_H__ */ |