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rsa_check_key_ex

API Overview​

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

Rule Description​

tip

RSA_check_key_ex() and RSA_check_key() return 1 if B<rsa> is a valid RSA key, and 0 otherwise. They return -1 if an error occurs while checking the key.

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("RSA_check_key_ex")
  }
}

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