DTU_4GLAN_HAL/app/IEC_SERVER/lib60870/scr/tls_mbedtls.c

#include "iec_include.h"

struct sTLSConfiguration {
    mbedtls_entropy_context entropy;
    mbedtls_ctr_drbg_context ctr_drbg;

    mbedtls_x509_crt ownCertificate;
    mbedtls_pk_context ownKey;

    mbedtls_x509_crt cacerts;

    mbedtls_x509_crl crl;

    mbedtls_ssl_config conf;
    LinkedList /* <mbedtls_x509_crt*> */ allowedCertificates;

    /* session cache for server */
    mbedtls_ssl_cache_context cache;

    /* client side cached session */
    mbedtls_ssl_session* savedSession;
    uint64_t savedSessionTime;

    bool chainValidation;
    bool allowOnlyKnownCertificates;

    /* TLS session renegotiation interval in milliseconds */
    int renegotiationTimeInMs;

    /* TLS minimum version allowed (default: TLS_VERSION_TLS_1_0) */
    TLSConfigVersion minVersion;
    
    /* TLS minimum version allowed (default: TLS_VERSION_TLS_1_2) */
    TLSConfigVersion maxVersion;

    TLSConfiguration_EventHandler eventHandler;
    void* eventHandlerParameter;

    /* time of the last CRL update */
    uint64_t crlUpdated;

    bool setupComplete;

    bool useSessionResumption;
    int sessionResumptionInterval; /* session resumption interval in seconds */
};

struct sTLSSocket {
    mbedtls_ssl_context ssl;
    Socket socket;
    mbedtls_ssl_config conf;
    TLSConfiguration tlsConfig;
    bool storePeerCert;
    uint8_t* peerCert;
    int peerCertLength;

    /* time of last session renegotiation (used to calculate next renegotiation time) */
    uint64_t lastRenegotiationTime;

    /* time of the last CRL update */
    uint64_t crlUpdated;
};