gnutls_x509_trust_list_add_cas - API function
int gnutls_x509_trust_list_add_cas(gnutls_x509_trust_list_t list, const gnutls_x509_crt_t * clist, unsigned clist_size, unsigned int flags);
This function will add the given certificate authorities to the trusted list. The CAs in clist must not be deinitialized during the lifetime of list .
If the flag GNUTLS_TL_NO_DUPLICATES is specified, then this function will ensure that no duplicates will be present in the final trust list.
If the flag GNUTLS_TL_NO_DUPLICATE_KEY is specified, then this function will ensure that no certificates with the same key are present in the final trust list.
If either GNUTLS_TL_NO_DUPLICATE_KEY or
GNUTLS_TL_NO_DUPLICATES are given,
gnutls_x509_trust_list_deinit() must be called with parameter
all being 1.
The number of added elements is returned; that includes duplicate entries.
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