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bn_div_word

API Overview​

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

Rule Description​

tip

BN_mod_word() and BN_div_word() return B<a>%B<w> on success and B<(BN_ULONG)-1> if an error occurred.

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("BN_div_word")
  }
}

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