User guide for the FIPS Red Hat Enterprise Linux - OpenSSL Module ================================================================= This package contains libraries which comprise the FIPS 140-2 Red Hat Enterprise Linux - OPENSSL Module. The module files ================ /usr/lib[64]/libcrypto.so.1.1.0 /usr/lib[64]/libssl.so.1.1.0 /usr/lib[64]/.libcrypto.so.1.1.0.hmac /usr/lib[64]/.libssl.so.1.1.0.hmac Dependencies ============ The approved mode of operation requires kernel with /dev/urandom RNG running with properties as defined in the security policy of the module. This is provided by kernel packages with validated Red Hat Enterprise Linux Kernel Crytographic Module. Installation ============ The RPM package of the module can be installed by standard tools recommended for installation of RPM packages on the Red Hat Enterprise Linux system (yum, rpm, RHN remote management tool). The RPM package dracut-fips must be installed for the approved mode of operation. Usage and API ============= The module respects kernel command line FIPS setting. If the kernel command line contains option fips=1 the module will initialize in the FIPS approved mode of operation automatically. To allow for the automatic initialization the application using the module has to call one of the following API calls: - void OPENSSL_init_library(void) - this will do only a basic initialization of the library and does initialization of the FIPS approved mode without setting up EVP API with supported algorithms. - void OPENSSL_add_all_algorithms(void) - this API function calls OPENSSL_init() implicitly and also adds all approved algorithms to the EVP API in the approved mode - void SSL_library_init(void) - it calls OPENSSL_init() implicitly and also adds algorithms which are necessary for TLS protocol support and initializes the SSL library. To explicitely put the library to the approved mode the application can call the following function: - int FIPS_mode_set(int on) - if called with 1 as a parameter it will switch the library from the non-approved to the approved mode. If any of the selftests and integrity verification tests fail, the library is put into the error state and 0 is returned. If they succeed the return value is 1. To query the module whether it is in the approved mode or not: - int FIPS_mode(void) - returns 1 if the module is in the approved mode, 0 otherwise. To query whether the module is in the error state: - int FIPS_selftest_failed(void) - returns 1 if the module is in the error state, 0 otherwise. To zeroize the FIPS RNG key and internal state the application calls: - void RAND_cleanup(void)