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[client] improved 'SynchronisationKey' security

This commit is contained in:
xdrm-brackets 2018-04-24 18:48:05 +02:00
parent e178642fea
commit 99f7df9ad5
1 changed files with 7 additions and 3 deletions
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10
src/git.xdrm.io/schastsp/client/client.go
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@ -148,13 +148,17 @@ func (c *T) Receive(r io.Reader) error {
---------------------------------------------------------*/
func (c *T) SynchronisationKey() ([]byte, error) {
/* (1) Get current hash */
/* (1) Reset keys so no value can be guessed*/
c.migrateKey(); // 1: copies 'sync' into 'key'
c.migrateKey(); // 2: copies random new 'sync' into 'key' (old 'sync)
/* (2) Get current hash */
hash, err := c.key.CurrentHash()
if err != nil { return nil, err }
/* (2) Decrement key so 'hash' is valid */
/* (3) Decrement key so 'hash' is valid */
c.key.Decrement()
/* (3) Return key */
/* (4) Return key */
return hash, nil;
}