Appendix A Description of the Self-Tests

In addition to the build time regression test suite, Libgcrypt implements self-tests to be performed at runtime. Which self-tests are actually used depends on the mode Libgcrypt is used in. In standard mode a limited set of self-tests is run at the time an algorithm is first used. Note that not all algorithms feature a self-test in standard mode. The GCRYCTL_SELFTEST control command may be used to run all implemented self-tests at any time; this will even run more tests than those run in FIPS mode.

If any of the self-tests fails, the library immediately returns an error code to the caller. If Libgcrypt is in FIPS mode the self-tests will be performed within the “Self-Test” state and any failure puts the library into the “Error” state.

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