diff options
| author | Stefan Suhren <suhren.stefan@fh-swf.de> | 2015-05-05 22:35:00 +0200 |
|---|---|---|
| committer | Stefan Suhren <suhren.stefan@fh-swf.de> | 2015-05-05 22:35:00 +0200 |
| commit | 80caac69c56411ef2df487f3e514abccad480572 (patch) | |
| tree | c0aa5dcf7d3ba4282e4d1ab17d96b734fce53298 | |
| parent | 556b463a79594c4a90e12237d6d5212d460f41d1 (diff) | |
| download | IT-Sicherheit-80caac69c56411ef2df487f3e514abccad480572.tar.gz IT-Sicherheit-80caac69c56411ef2df487f3e514abccad480572.zip | |
Fix a rare bug according to Heiko
| -rw-r--r-- | src/crypt/cryptrc4.cpp | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/crypt/cryptrc4.cpp b/src/crypt/cryptrc4.cpp index 88806c8..2154b04 100644 --- a/src/crypt/cryptrc4.cpp +++ b/src/crypt/cryptrc4.cpp @@ -24,12 +24,14 @@ void CryptRc4::rc4SetKeyOwn(QByteArray key) m_rc4Key.x = 0; m_rc4Key.y = 0; - for(RC4_INT i = 0; i < 256; i++) + for (int i = 0; i < 256; i++) { - m_rc4Key.data[i] = i; + m_rc4Key.data[i] = i; } + RC4_INT j = 0; - for(RC4_INT i = 0; i < 256; i++) + + for (int i = 0; i < 256; i++) { j = (j + m_rc4Key.data[i] + key[i % key.length()]) % 256; swap(m_rc4Key.data[i], m_rc4Key.data[j]); @@ -50,14 +52,16 @@ QByteArray CryptRc4::rc4RunOwn(QByteArray clear) RC4_INT i = 0; RC4_INT j = 0; - for(int k = 0; k < crypt.length(); k++) + + for (int k = 0; k < crypt.length(); k++) { i = (i + 1) % 256; j = (j + m_rc4Key.data[i]) % 256; swap(m_rc4Key.data[i], m_rc4Key.data[j]); - crypt[k] = crypt[k] ^ m_rc4Key.data[(m_rc4Key.data[i] + m_rc4Key.data[j]) % 256]; + crypt[k] = crypt[k] ^ m_rc4Key.data[(m_rc4Key.data[i] + m_rc4Key.data[j]) % + 256]; } return crypt; |