1SSL_load_client_CA_file(3)          OpenSSL         SSL_load_client_CA_file(3)
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NAME

6       SSL_load_client_CA_file - load certificate names from file
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SYNOPSIS

9        #include <openssl/ssl.h>
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11        STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file);
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DESCRIPTION

14       SSL_load_client_CA_file() reads certificates from file and returns a
15       STACK_OF(X509_NAME) with the subject names found.
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NOTES

18       SSL_load_client_CA_file() reads a file of PEM formatted certificates
19       and extracts the X509_NAMES of the certificates found. While the name
20       suggests the specific usage as support function for
21       SSL_CTX_set_client_CA_list(3), it is not limited to CA certificates.
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EXAMPLES

24       Load names of CAs from file and use it as a client CA list:
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26        SSL_CTX *ctx;
27        STACK_OF(X509_NAME) *cert_names;
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29        ...
30        cert_names = SSL_load_client_CA_file("/path/to/CAfile.pem");
31        if (cert_names != NULL)
32          SSL_CTX_set_client_CA_list(ctx, cert_names);
33        else
34          error_handling();
35        ...
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RETURN VALUES

38       The following return values can occur:
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40       NULL
41           The operation failed, check out the error stack for the reason.
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43       Pointer to STACK_OF(X509_NAME)
44           Pointer to the subject names of the successfully read certificates.
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SEE ALSO

47       ssl(3), SSL_CTX_set_client_CA_list(3)
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511.0.2o                            2020-01-28        SSL_load_client_CA_file(3)