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_default_ca_cert_file — 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);

const char *
tls_default_ca_cert_file(void);

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_default_ca_cert_file() returns the path of the file that contains the default root certificates.

tls_config_set_ca_file() loads 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() loads a file containing the public certificate.

tls_config_set_cert_mem() sets the public certificate directly from memory.

tls_config_set_crl_file() loads a file containing the Certificate Revocation List (CRL).

tls_config_set_crl_mem() sets the CRL directly from memory.

tls_config_set_key_file() loads a file containing the private key.

tls_config_set_key_mem() directly sets the private key from memory.

tls_config_set_ocsp_staple_file() loads a file containing a DER-encoded OCSP response to be stapled during the TLS handshake.

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() loads two 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() loads three files containing the public certificate, private key, and DER-encoded OCSP staple.

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 contributions 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>.