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x509_verify_cert

API Overview​

X509_verify_cert is an API in openssl. This rule belongs to the return value check type. This rule is generated using AURC.

Rule Description​

tip

Both X509_verify_cert() and X509_STORE_CTX_verify() return 1 if a complete chain can be built and validated, otherwise they return 0, and in exceptional circumstances (such as malloc failure and internal errors) they can also return a negative code.

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_verify_cert")
  }
}

from OpenSSLFunctionCall call, UnaryOperation uop
where
  uop.getOperator() = "!" and
  uop.getOperand() = call.getAnAccess()
select uop, "This negation checks the return value of X509_verify_cert."