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x509_lookup_ctrl

API Overview​

X509_LOOKUP_ctrl is an API in openssl. This rule belongs to the return value check type. This rule is generated using AURC.

Rule Description​

tip

X509_LOOKUP_ctrl() returns -1 if the B<X509_LOOKUP> doesn't have an associated B<X509_LOOKUP_METHOD>, or 1 if the X<509_LOOKUP_METHOD> doesn't have a control function. Otherwise, it returns what the control function in the B<X509_LOOKUP_METHOD> returns, which is usually 1 on success and 0 in error.

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("X509_LOOKUP_ctrl")
  }
}

from OpenSSLFunctionCall call, UnaryOperation uop
where
  uop.getOperator() = "!" and
  uop.getOperand() = call.getAnAccess()
select uop, "This negation checks the return value of X509_LOOKUP_ctrl."