TLS_LOAD_FILE(3)

NAME
tls_load_file, tls_unload_file, tls_config_set_ca_file, tls_config_set_ca_path, tls_config_set_ca_mem, tls_config_set_cert_file, tls_config_set_cert_mem, tls_config_set_crl_file, tls_config_set_crl_mem, tls_config_set_key_file, tls_config_set_key_mem, tls_config_set_ocsp_staple_mem, tls_config_set_ocsp_staple_file, tls_config_set_keypair_file, tls_config_set_keypair_mem, tls_config_set_keypair_ocsp_file, tls_config_set_keypair_ocsp_mem, tls_config_add_keypair_file, tls_config_add_keypair_ocsp_mem, tls_config_add_keypair_ocsp_file, tls_config_add_keypair_mem, tls_config_clear_keys, tls_config_set_verify_depth, tls_config_verify_client, tls_config_verify_client_optional - TLS certificate and key configuration

SYNOPSIS
#include <tls.h>
uint8_t *
tls_load_file(const char *file, size_t *len, char *password);
void
tls_unload_file(uint8_t *buf, size_t len);
int
tls_config_set_ca_file(struct tls_config *config, const char *ca_file);
int
tls_config_set_ca_path(struct tls_config *config, const char *ca_path);
int
tls_config_set_ca_mem(struct tls_config *config, const uint8_t *cert, size_t len);
int
tls_config_set_cert_file(struct tls_config *config, const char *cert_file);
int
tls_config_set_cert_mem(struct tls_config *config, const uint8_t *cert, size_t len);
int
tls_config_set_crl_file(struct tls_config *config, const char *crl_file);
int
tls_config_set_crl_mem(struct tls_config *config, const uint8_t *crl, size_t len);
int
tls_config_set_key_file(struct tls_config *config, const char *key_file);
int
tls_config_set_key_mem(struct tls_config *config, const uint8_t *key, size_t len);
int
tls_config_set_ocsp_staple_mem(struct tls_config *config, const uint8_t *staple, size_t len);
int
tls_config_set_ocsp_staple_file(struct tls_config *config, const char *staple_file);
int
tls_config_set_keypair_file(struct tls_config *config, const char *cert_file, const char *key_file);
int
tls_config_set_keypair_mem(struct tls_config *config, const uint8_t *cert, size_t cert_len, const uint8_t *key, size_t key_len);
int
tls_config_set_keypair_ocsp_file(struct tls_config *config, const char *cert_file, const char *key_file, const char *staple_file);
int
tls_config_set_keypair_ocsp_mem(struct tls_config *config, const uint8_t *cert, size_t cert_len, const uint8_t *key, size_t key_len, const uint8_t *staple, size_t staple_len);
int
tls_config_add_keypair_file(struct tls_config *config, const char *cert_file, const char *key_file);
int
tls_config_add_keypair_mem(struct tls_config *config, const uint8_t *cert, size_t cert_len, const uint8_t *key, size_t key_len);
int
tls_config_add_keypair_ocsp_file(struct tls_config *config, const char *cert_file, const char *key_file, const char *staple_file);
int
tls_config_add_keypair_ocsp_mem(struct tls_config *config, const uint8_t *cert, size_t cert_len, const uint8_t *key, size_t key_len, const uint8_t *staple, size_t staple_len);
void
tls_config_clear_keys(struct tls_config *config);
int
tls_config_set_verify_depth(struct tls_config *config, int verify_depth);
void
tls_config_verify_client(struct tls_config *config);
void
tls_config_verify_client_optional(struct tls_config *config);

DESCRIPTION
tls_load_file() loads a certificate or key from disk into memory to be used with tls_config_set_ca_mem(), tls_config_set_cert_mem(), tls_config_set_crl_mem() or tls_config_set_key_mem(). A private key will be decrypted if the optional password argument is specified.

tls_unload_file() unloads the memory that was returned from an earlier tls_load_file() call, ensuring that the memory contents is discarded.

tls_config_set_ca_file() sets the filename used to load a file containing the root certificates.

tls_config_set_ca_path() sets the path (directory) which should be searched for root certificates.

tls_config_set_ca_mem() sets the root certificates directly from memory.

tls_config_set_cert_file() sets file from which the public certificate will be read.

tls_config_set_cert_mem() sets the public certificate directly from memory.

tls_config_set_crl_file() sets the filename used to load a file containing the Certificate Revocation List (CRL).

tls_config_set_crl_mem() sets the CRL directly from memory.

tls_config_set_key_file() sets the file from which the private key will be read.

tls_config_set_key_mem() directly sets the private key from memory.

tls_config_set_ocsp_staple_file() sets a DER-encoded OCSP response to be stapled during the TLS handshake from the specified file.

tls_config_set_ocsp_staple_mem() sets a DER-encoded OCSP response to be stapled during the TLS handshake from memory.

tls_config_set_keypair_file() sets the files from which the public certificate, and private key will be read.

tls_config_set_keypair_mem() directly sets the public certificate, and private key from memory.

tls_config_set_keypair_ocsp_file() sets the files from which the public certificate, private key, and DER-encoded OCSP staple will be read.

tls_config_set_keypair_ocsp_mem() directly sets the public certificate, private key, and DER-encoded OCSP staple from memory.

tls_config_add_keypair_file() adds an additional public certificate, and private key from the specified files, used as an alternative certificate for Server Name Indication (server only).

tls_config_add_keypair_mem() adds an additional public certificate, and private key from memory, used as an alternative certificate for Server Name Indication (server only).

tls_config_add_keypair_ocsp_file() adds an additional public certificate, private key, and DER-encoded OCSP staple from the specified files, used as an alternative certificate for Server Name Indication (server only).

tls_config_add_keypair_ocsp_mem() adds an additional public certificate, private key, and DER-encoded OCSP staple from memory, used as an alternative certificate for Server Name Indication (server only).

tls_config_clear_keys() clears any secret keys from memory.

tls_config_set_verify_depth() limits the number of intermediate certificates that will be followed during certificate validation.

tls_config_verify_client() enables client certificate verification, requiring the client to send a certificate (server only).

tls_config_verify_client_optional() enables client certificate verification, without requiring the client to send a certificate (server only).

RETURN VALUES
tls_load_file() returns NULL on error or an out of memory condition.

The other functions return 0 on success or -1 on error.

SEE ALSO
tls_config_ocsp_require_stapling(3), tls_config_set_protocols(3), tls_config_set_session_id(3), tls_configure(3), tls_init(3)

HISTORY
tls_config_set_ca_file(), tls_config_set_ca_path(), tls_config_set_cert_file(), tls_config_set_cert_mem(), tls_config_set_key_file(), tls_config_set_key_mem(), and tls_config_set_verify_depth() appeared in OpenBSD 5.6 and got their final names in OpenBSD 5.7.

tls_load_file(), tls_config_set_ca_mem(), and tls_config_clear_keys() appeared in OpenBSD 5.7.

tls_config_verify_client() and tls_config_verify_client_optional() appeared in OpenBSD 5.9.

tls_config_set_keypair_file() and tls_config_set_keypair_mem() appeared in OpenBSD 6.0, and tls_config_add_keypair_file() and tls_config_add_keypair_mem() in OpenBSD 6.1.

tls_config_set_crl_file() and tls_config_set_crl_mem() appeared in OpenBSD 6.2.

AUTHORS
Joel Sing <jsing@openbsd.org> with contibutions from Ted Unangst <tedu@openbsd.org> and Bob Beck <beck@openbsd.org>.

tls_load_file() and tls_config_set_ca_mem() were written by Reyk Floeter <reyk@openbsd.org>.