Alternative for structure opaque X509 & X509_STORE_CTX

[Shivakumar Poojari]

Hi Matt,
Seen this comment in GitHub

OpenSSL 1.1.0 made many structures opaque. You cannot directly access the fields inside the X509 structure any more. Instead you must use accessor functions. In this case, as @slontis<https://github.com/slontis> says, you must use the function X509_get0_signature()
https://github.com/openssl/openssl/issues/12447#issuecomment-660958868

:error: invalid use of incomplete type 'X509' {aka 'struct x509_st'}
     if (x->ocsp && x->ocsp->ocsp_url)

:error: invalid use of incomplete type 'X509' {aka 'struct x509_st'}
         if(cert->sig_alg)

:types.h:157:16: note: forward declaration of 'X509' {aka 'struct x509_st'}
 typedef struct x509_st X509;

error: invalid use of incomplete type 'X509' {aka 'struct x509_st'}
             sigAlg = OBJ_obj2nid((cert)->sig_alg->algorithm);

 error: invalid use of incomplete type 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
     x = ctx->cert;
            ^~
types.h:165:16: note: forward declaration of 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
 typedef struct x509_store_ctx_st X509_STORE_CTX;
                ^~~~~~~~~~~~~~~~~

error: invalid use of incomplete type 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
     ctx->current_cert = x;
        ^~

error: invalid use of incomplete type 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
     ctx->current_issuer = NULL;
        ^~

error: invalid use of incomplete type 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
     ctx->current_crl_score = 0;
        ^~

types.h:165:16: note: forward declaration of 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
 typedef struct x509_store_ctx_st X509_STORE_CTX;
                ^~~~~~~~~~~~~~~~~

types.h:165:16: note: forward declaration of 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
 typedef struct x509_store_ctx_st X509_STORE_CTX;
                ^~~~~~~~~~~~~~~~~
/sonus/p4/ws/spoojari/openssl3/marlin/SIPCM/sipCmOpenSSL.c:3268:8: error: invalid use of incomplete type 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
     ctx->current_reasons = 0;
        ^~

error: invalid use of incomplete type 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
     ctx->error = 0;
        ^~
error: invalid use of incomplete type 'X509' {aka 'struct x509_st'}
             if (px->ocsp && (px->ocsp->ocsp_validate == X509_OCSP_VALIDATE_DISABLED))
                   ^~

error: invalid use of incomplete type 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
         if (!ctx->ctx->ocsp_process_responder)
                 ^~

error: invalid use of incomplete type 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
     store = ctx->ctx;
                ^~

error: invalid use of incomplete type 'X509_STORE_CTX' {aka 'struct x509_store_ctx_st'}
         ok = ctx->verify_cb(0, ctx);
                 ^~
Getting above error in the code, Please provide the document that which function i can use to resolve this errors.

Thanks,
Shiva kumar

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