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ssl_get_extms_support

API Overview​

SSL_get_extms_support is an API in openssl. This rule belongs to the return value check type. This rule is generated using AURC.

Rule Description​

tip

SSL_get_extms_support() returns 1 if the current session used extended master secret, 0 if it did not and -1 if a handshake is currently in progress i.e. it is not possible to determine if extended master secret was used.

info
  • Tags: return value check
  • Parameter Index: N/A
  • CWE Type: CWE-253

Rule Code​

import cpp

class OpenSSLFunctionCall extends FunctionCall {
  OpenSSLFunctionCall() {
    this.getTarget().hasName("SSL_get_extms_support")
  }
}

from OpenSSLFunctionCall call, UnaryOperation uop
where
  uop.getOperator() = "!" and
  uop.getOperand() = call.getAnAccess()
select uop, "This negation checks the return value of SSL_get_extms_support."