SSL_LOAD_CLIENT_CA_FILE - Online Linux Manual PageSection : 3ossl
Updated : 2022-03-15
Source : 3.0.2
Note : OpenSSL
NAMESSL_load_client_CA_file_ex, SSL_load_client_CA_file, SSL_add_file_cert_subjects_to_stack, SSL_add_dir_cert_subjects_to_stack, SSL_add_store_cert_subjects_to_stack ​− load certificate names
SYNOPSIS​ #include <openssl/ssl.h> ​ ​ STACK_OF(X509_NAME) *SSL_load_client_CA_file_ex(const char *file, ​ OSSL_LIB_CTX *libctx, ​ const char *propq); ​ STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file); ​ ​ int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, ​ const char *file); ​ int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, ​ const char *dir); ​ int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, ​ const char *store);
DESCRIPTION​SSL_load_client_CA_file_ex() reads certificates from file and returns a STACK_OF(X509_NAME) with the subject names found. The library context libctx and property query propq are used when fetching algorithms from providers. ​SSL_load_client_CA_file() is similar to SSL_load_client_CA_file_ex() but uses NULL for the library context libctx and property query propq. ​SSL_add_file_cert_subjects_to_stack() reads certificates from file, and adds their subject name to the already existing stack. ​SSL_add_dir_cert_subjects_to_stack() reads certificates from every file in the directory dir, and adds their subject name to the already existing stack. ​SSL_add_store_cert_subjects_to_stack() loads certificates from the ​store URI, and adds their subject name to the already existing ​stack.
NOTES​SSL_load_client_CA_file() reads a file of PEM formatted certificates and extracts the X509_NAMES of the certificates found. While the name suggests the specific usage as support function for ​SSL_CTX_set_client_CA_list (3), it is not limited to CA certificates.
RETURN VALUESThe following return values can occur: NULL The operation failed, check out the error stack for the reason. Pointer to STACK_OF(X509_NAME) Pointer to the subject names of the successfully read certificates.
EXAMPLESLoad names of CAs from file and use it as a client CA list: ​ SSL_CTX *ctx; ​ STACK_OF(X509_NAME) *cert_names; ​ ​ ... ​ cert_names = SSL_load_client_CA_file("/path/to/CAfile.pem"); ​ if (cert_names != NULL) ​ SSL_CTX_set_client_CA_list(ctx, cert_names); ​ else ​ /* error */ ​ ...
SEE ALSO​ssl (7), ​ossl_store (7), ​SSL_CTX_set_client_CA_list (3)
HISTORY​SSL_load_client_CA_file_ex() and SSL_add_store_cert_subjects_to_stack() were added in OpenSSL 3.0.
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