Replumbing: add a configuration module for providers

This configuration module supports a configuration structure pretty
much like the engine configuration module, i.e. something like this:

    openssl_conf = openssl_init

    [openssl_init]
    providers = provider_section

    [provider_section]
    # Configure the provider named "foo"
    foo = foo_section
    # Configure the provider named "bar"
    bar = bar_section

    [foo_section]
    # Override name given in the provider section
    identity = myfoo
    # The exact path of the module.  This is platform specific
    module_path = /opt/openssl/modules/foo.so
    # Whether it should be automatically activated.  Value is unimportant
    activate = whatever

    # Anything else goes as well, and becomes parameters that the
    # provider can get
    what = 1
    # sub-sections will be followed as well
    ever = ever_section

    [ever_section]
    cookie = monster

All the configurations in a provider section and its sub-sections
become parameters for the provider to get, i.e. the "foo" provider
will be able to get values for the following keys (with associated
values shown):

    identity            => myfoo
    module_path         => /opt/openssl/modules/foo.so
    activate            => whatever
    what                => 1
    ever.cookie         => monster

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8549)

1 files changed, 6 insertions, 0 deletions

diff --git a/crypto/cpt_err.c b/crypto/cpt_err.c
index cca8037855..8c386925f8 100644
--- a/crypto/cpt_err.c
+++ b/crypto/cpt_err.c
@@ -63,6 +63,10 @@ static const ERR_STRING_DATA CRYPTO_str_functs[] = {
      "pkey_siphash_init"},
     {ERR_PACK(ERR_LIB_CRYPTO, CRYPTO_F_PROVIDER_ACTIVATE, 0),
      "provider_activate"},
+    {ERR_PACK(ERR_LIB_CRYPTO, CRYPTO_F_PROVIDER_CONF_INIT, 0),
+     "provider_conf_init"},
+    {ERR_PACK(ERR_LIB_CRYPTO, CRYPTO_F_PROVIDER_CONF_LOAD, 0),
+     "provider_conf_load"},
     {ERR_PACK(ERR_LIB_CRYPTO, CRYPTO_F_PROVIDER_NEW, 0), "provider_new"},
     {ERR_PACK(ERR_LIB_CRYPTO, CRYPTO_F_PROVIDER_STORE_NEW, 0),
      "provider_store_new"},
@@ -79,6 +83,8 @@ static const ERR_STRING_DATA CRYPTO_str_reasons[] = {
     "odd number of digits"},
     {ERR_PACK(ERR_LIB_CRYPTO, 0, CRYPTO_R_PROVIDER_ALREADY_EXISTS),
     "provider already exists"},
+    {ERR_PACK(ERR_LIB_CRYPTO, 0, CRYPTO_R_PROVIDER_SECTION_ERROR),
+    "provider section error"},
     {0, NULL}
 };