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asn1_time_cmp_time_t

API Overview​

ASN1_TIME_cmp_time_t is an API in openssl. This rule belongs to the return value check type. This rule is generated using AURC.

Rule Description​

tip

ASN1_TIME_cmp_time_t() and ASN1_UTCTIME_cmp_time_t() return -1 if I<s> is before I<t>, 0 if I<s> equals I<t>, or 1 if I<s> is after I<t>. -2 is returned on 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("ASN1_TIME_cmp_time_t")
  }
}

from OpenSSLFunctionCall call, UnaryOperation uop
where
  uop.getOperator() = "!" and
  uop.getOperand() = call.getAnAccess()
select uop, "This negation checks the return value of ASN1_TIME_cmp_time_t."