X509_STORE_CTX_init(3)

NAME

       X509_STORE_CTX_new, X509_STORE_CTX_cleanup, X509_STORE_CTX_free,
       X509_STORE_CTX_init, X509_STORE_CTX_trusted_stack,
       X509_STORE_CTX_set_cert, X509_STORE_CTX_set_chain,
       X509_STORE_CTX_set0_crls, X509_STORE_CTX_get0_param,
       X509_STORE_CTX_set0_param, X509_STORE_CTX_set_default - X509_STORE_CTX
       initialisation

SYNOPSIS

        #include <openssl/x509_vfy.h>

        X509_STORE_CTX *X509_STORE_CTX_new(void);
        void X509_STORE_CTX_cleanup(X509_STORE_CTX *ctx);
        void X509_STORE_CTX_free(X509_STORE_CTX *ctx);

        int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store,
                                X509 *x509, STACK_OF(X509) *chain);

        void X509_STORE_CTX_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk);

        void   X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx,X509 *x);
        void   X509_STORE_CTX_set_chain(X509_STORE_CTX *ctx,STACK_OF(X509) *sk);
        void   X509_STORE_CTX_set0_crls(X509_STORE_CTX *ctx, STACK_OF(X509_CRL) *sk);

        X509_VERIFY_PARAM *X509_STORE_CTX_get0_param(X509_STORE_CTX *ctx);
        void X509_STORE_CTX_set0_param(X509_STORE_CTX *ctx, X509_VERIFY_PARAM *param);
        int X509_STORE_CTX_set_default(X509_STORE_CTX *ctx, const char *name);

DESCRIPTION

       These functions initialise an X509_STORE_CTX structure for subsequent
       use by X509_verify_cert().

       X509_STORE_CTX_new() returns a newly initialised X509_STORE_CTX struc-
       ture.

       X509_STORE_CTX_cleanup() internally cleans up an X509_STORE_CTX struc-
       ture.  The context can then be reused with an new call to
       X509_STORE_CTX_init().

       X509_STORE_CTX_free() completely frees up ctx. After this call ctx is
       no longer valid.

       X509_STORE_CTX_init() sets up ctx for a subsequent verification opera-
       tion.  It must be called before each call to X509_verify_cert(), i.e. a
       ctx is only good for one call to X509_verify_cert(); if you want to
       verify a second certificate with the same ctx then you must call
       X509_STORE_CTX_cleanup() and then X509_STORE_CTX_init() again before
       the second call to X509_verify_cert(). The trusted certificate store is
       set to store, the end entity certificate to be verified is set to x509
       and a set of additional certificates (which will be untrusted but may
       be used to build the chain) in chain. Any or all of the store, x509 and
       chain parameters can be NULL.

       X509_STORE_CTX_trusted_stack() sets the set of trusted certificates of
       ctx to sk. This is an alternative way of specifying trusted certifi-
       cates instead of using an X509_STORE.

       X509_STORE_CTX_set_cert() sets the certificate to be vertified in ctx
       to x.

       X509_STORE_CTX_set_chain() sets the additional certificate chain used
       by ctx to sk.

       X509_STORE_CTX_set0_crls() sets a set of CRLs to use to aid certificate
       verification to sk. These CRLs will only be used if CRL verification is
       enabled in the associated X509_VERIFY_PARAM structure. This might be
       used where additional "useful" CRLs are supplied as part of a protocol,
       for example in a PKCS#7 structure.

       X509_VERIFY_PARAM *X509_STORE_CTX_get0_param() retrieves an intenal
       pointer to the verification parameters associated with ctx.

       X509_STORE_CTX_set0_param() sets the intenal verification parameter
       pointer to param. After this call param should not be used.

       X509_STORE_CTX_set_default() looks up and sets the default verification
       method to name. This uses the function X509_VERIFY_PARAM_lookup() to
       find an appropriate set of parameters from name.

NOTES

       The certificates and CRLs in a store are used internally and should not
       be freed up until after the associated X509_STORE_CTX is freed. Legacy
       applications might implicitly use an X509_STORE_CTX like this:

         X509_STORE_CTX ctx;
         X509_STORE_CTX_init(&ctx, store, cert, chain);

       this is not recommended in new applications they should instead do:

         X509_STORE_CTX *ctx;
         ctx = X509_STORE_CTX_new();
         if (ctx == NULL)
               /* Bad error */
         X509_STORE_CTX_init(ctx, store, cert, chain);

BUGS

       The certificates and CRLs in a context are used internally and should
       not be freed up until after the associated X509_STORE_CTX is freed.
       Copies should be made or reference counts increased instead.

RETURN VALUES

       X509_STORE_CTX_new() returns an newly allocates context or NULL is an
       error occurred.

       X509_STORE_CTX_init() returns 1 for success or 0 if an error occurred.

       X509_STORE_CTX_get0_param() returns a pointer to an X509_VERIFY_PARAM
       structure or NULL if an error occurred.

       X509_STORE_CTX_cleanup(), X509_STORE_CTX_free(),
       X509_STORE_CTX_trusted_stack(), X509_STORE_CTX_set_cert(),
       X509_STORE_CTX_set_chain(), X509_STORE_CTX_set0_crls() and
       X509_STORE_CTX_set0_param() do not return values.

       X509_STORE_CTX_set_default() returns 1 for success or 0 if an error
       occurred.

SEE ALSO

       X509_verify_cert(3) X509_VERIFY_PARAM_set_flags(3)

HISTORY

       X509_STORE_CTX_set0_crls() was first added to OpenSSL 1.0.0

1.0.2t                            2019-09-10             X509_STORE_CTX_new(3)