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v3_usm.go: add privacy passphrase in extendKeyBlumenthal cacheKey call #425

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Jan 23, 2023
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v3_usm.go: add privacy passphrase in extendKeyBlumenthal cacheKey call #425

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4 changes: 2 additions & 2 deletions v3_usm.go
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Original file line number Diff line number Diff line change
Expand Up @@ -493,12 +493,12 @@ func extendKeyReeder(authProtocol SnmpV3AuthProtocol, password string, engineID
// https://tools.ietf.org/html/draft-blumenthal-aes-usm-04#page-7
// Not many vendors use this algorithm.
// Previously implemented in the net-snmp and pysnmp libraries.
// Not tested
// TODO: Not tested
func extendKeyBlumenthal(authProtocol SnmpV3AuthProtocol, password string, engineID string) ([]byte, error) {
var key []byte
var err error

key, err = hMAC(authProtocol.HashType(), cacheKey(authProtocol, ""), password, engineID)
key, err = hMAC(authProtocol.HashType(), cacheKey(authProtocol, password), password, engineID)

if err != nil {
return nil, err
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