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[GB.OPENSSL]

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* BUG: Cipher.DecryptSalted() doesn't return rubbish after the decrypted text anymore
This commit is contained in:
Tobias Boege 2017-09-16 23:52:47 +02:00
parent 0f072edcbf
commit fe4f54a3be
1 changed files with 7 additions and 3 deletions
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10
gb.openssl/src/c_cipher.c
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@ -327,6 +327,9 @@ BEGIN_METHOD(CipherMethod_EncryptSalted, GB_STRING plain; GB_STRING passwd;
memcpy(salt, STRING(salt), MIN(sizeof(salt), LENGTH(salt)));
}
// "openssl enc" >= 1.1.0 uses SHA256 by default instead of MD5
// EVP_BytesToKey(_method, EVP_sha256(), salt, (uchar *) STRING(passwd),
// LENGTH(passwd), ITER, key, iv);
EVP_BytesToKey(_method, EVP_md5(), salt, (uchar *) STRING(passwd),
LENGTH(passwd), ITER, key, iv);
cipher = do_cipher((uchar *) STRING(plain), LENGTH(plain), key, iv,
@ -364,6 +367,9 @@ BEGIN_METHOD(CipherMethod_DecryptSalted, GB_STRING cipher; GB_STRING passwd)
/* salt begins at STRING(cipher) + strlen("Salted__") */
memcpy(salt, STRING(cipher) + 8, sizeof(salt));
// "openssl enc" >= 1.1.0 uses SHA256 by default instead of MD5
// EVP_BytesToKey(_method, EVP_sha256(), salt, (uchar *) STRING(passwd),
// LENGTH(passwd), ITER, key, iv);
EVP_BytesToKey(_method, EVP_md5(), salt, (uchar *) STRING(passwd),
LENGTH(passwd), ITER, key, iv);
cipher = (uchar *) STRING(cipher) + 8 + sizeof(salt);
@ -373,10 +379,8 @@ BEGIN_METHOD(CipherMethod_DecryptSalted, GB_STRING cipher; GB_STRING passwd)
GB.Error(errmsg ? errmsg : "Decryption failed");
return;
}
GB.ReturnString(plain);
GB.ReturnBorrow();
GB.ReturnNewString(plain, length);
GB.FreeString(&plain);
GB.ReturnRelease();
END_METHOD