X509_STORE_CTX_init (3)

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(The comments found at the beginning of the groff file "man3/X509_STORE_CTX_init.3ssl".)

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 structure.

X509_STORE_CTX_cleanup() internally cleans up an X509_STORE_CTX structure. 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 After this call ctx is no longer valid.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 operation. 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_XTORE_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

.

X509_STORE_CTX_trusted_stack() sets the set of trusted certificates of ctx to sk. This is an alternative way of specifying trusted certificates 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

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 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

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