X509_STORE_CTX_NEW - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMEX509_STORE_CTX_new, X509_STORE_CTX_cleanup, X509_STORE_CTX_free, X509_STORE_CTX_init, X509_STORE_CTX_set0_trusted_stack, X509_STORE_CTX_set_cert, X509_STORE_CTX_set0_crls, X509_STORE_CTX_get0_chain, X509_STORE_CTX_set0_verified_chain, X509_STORE_CTX_get0_param, X509_STORE_CTX_set0_param, X509_STORE_CTX_get0_untrusted, X509_STORE_CTX_set0_untrusted, X509_STORE_CTX_get_num_untrusted, X509_STORE_CTX_set_default, X509_STORE_CTX_set_verify, X509_STORE_CTX_verify_fn ​− 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_set0_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk); ​ ​ void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x); ​ STACK_OF(X509) *X509_STORE_CTX_get0_chain(X509_STORE_CTX *ctx); ​ void X509_STORE_CTX_set0_verified_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *chain); ​ 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); ​ ​ STACK_OF(X509)* X509_STORE_CTX_get0_untrusted(X509_STORE_CTX *ctx); ​ void X509_STORE_CTX_set0_untrusted(X509_STORE_CTX *ctx, STACK_OF(X509) *sk); ​ ​ int X509_STORE_CTX_get_num_untrusted(X509_STORE_CTX *ctx); ​ ​ typedef int (*X509_STORE_CTX_verify_fn)(X509_STORE_CTX *); ​ void X509_STORE_CTX_set_verify(X509_STORE_CTX *ctx, X509_STORE_CTX_verify_fn verify);
DESCRIPTIONThese 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 a new call to X509_STORE_CTX_init(). ​X509_STORE_CTX_free() completely frees up ctx. After this call ctx is no longer valid. If ctx is NULL nothing is done. ​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_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_set0_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 verified in ctx to ​x. ​X509_STORE_CTX_set0_verified_chain() sets the validated chain used by ctx to be chain. Ownership of the chain is transferred to ctx and should not be free'd by the caller. ​X509_STORE_CTX_get0_chain() returns the internal pointer used by the ​ctx that contains the validated chain. ​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_STORE_CTX_get0_param() retrieves an internal pointer to the verification parameters associated with ctx. ​X509_STORE_CTX_get0_untrusted() retrieves an internal pointer to the stack of untrusted certificates associated with ctx. ​X509_STORE_CTX_set0_untrusted() sets the internal point to the stack of untrusted certificates associated with ctx to sk. ​X509_STORE_CTX_set0_param() sets the internal 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. ​X509_STORE_CTX_get_num_untrusted() returns the number of untrusted certificates that were used in building the chain following a call to X509_verify_cert(). ​X509_STORE_CTX_set_verify() provides the capability for overriding the default verify function. This function is responsible for verifying chain signatures and expiration times. A verify function is defined as an X509_STORE_CTX_verify type which has the following signature: ​ int (*verify)(X509_STORE_CTX *); This function should receive the current X509_STORE_CTX as a parameter and return 1 on success or 0 on failure.
NOTESThe certificates and CRLs in a store are used internally and should not be freed up until after the associated X509_STORE_CTX is freed.
BUGSThe 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 a newly allocated context or NULL if 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_set0_trusted_stack(), ​X509_STORE_CTX_set_cert(), ​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. ​X509_STORE_CTX_get_num_untrusted() returns the number of untrusted certificates used.
SEE ALSO​X509_verify_cert (3) ​X509_VERIFY_PARAM_set_flags (3)
HISTORYThe X509_STORE_CTX_set0_crls() function was added in OpenSSL 1.0.0. The X509_STORE_CTX_get_num_untrusted() function was added in OpenSSL 1.1.0.
COPYRIGHTCopyright 2009−2020 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the ‟License”). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 0
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