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Security Audit report: 4.2. Enhance encryption of values in memory.

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This commit is contained in:
Jim Norman 2006-04-19 20:22:39 +00:00
parent 3fbb9e92d2
commit ac0dbfc4e4
2 changed files with 17 additions and 14 deletions
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4
CASA.changes
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@ -1,3 +1,7 @@
-------------------------------------------------------------------
Wed Apr 19 14:22:10 MST 2006 - jnorman@novell.com
- Security Audit report: 4.2. Enhance encryption of values in memory.
-------------------------------------------------------------------
Mon Apr 17 15:47:10 MST 2006 - jnorman@novell.com
- Security Audit. Checkpoint changes thus far to c code.

27
c_micasad/cache/KeyValue.cs vendored
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@ -132,7 +132,7 @@ namespace sscs.cache
return mLinkedKeys;
}
private DateTime m_dtEncryptTime = DateTime.Now;
private DateTime m_created;
public DateTime CreatedTime
{
@ -177,6 +177,8 @@ namespace sscs.cache
private byte[] EncryptValue(byte[] baValueClear)
{
// set encrypttime
m_dtEncryptTime = DateTime.Now;
return (XORValue(baValueClear));
}
@ -191,19 +193,16 @@ namespace sscs.cache
return XORValue(m_value);
}
private byte[] XORValue(byte[] baInput)
{
byte[] baOutput = new byte[baInput.Length];
Random rand = new Random((int)m_created.Ticks);
for (int i=0; i<baInput.Length; i++)
{
baOutput[i] = (byte)((int)baInput[i] ^ rand.Next());
}
return baOutput;
}
private byte[] XORValue(byte[] baInput)
{
byte[] baOutput = new byte[baInput.Length];
Random ranNum = new Random(this.Key.GetHashCode());
for (int i=0; i<baInput.Length; i++)
{
baOutput[i] = (byte)((int)baInput[i] ^ ranNum.Next() ^ (~i) ^ m_dtEncryptTime.Ticks);
}
return baOutput;
}
public int GetValueType()
{