STORE: Add a built-in 'file:' storemgmt implementation (loader)

This replaces the older 'file:' loader that is now an engine.

It's still possible to use the older 'file:' loader by explicitly
using the engine, and tests will remain for it as long as ENGINEs are
still supported (even through deprecated).

To support this storemgmt implementation, a few internal OSSL_DECODER
modifications are needed:

-   An internal function that implements most of
    OSSL_DECODER_CTX_new_by_EVP_PKEY(), but operates on an already
    existing OSSL_DECODER_CTX instead of allocating a new one.
-   Allow direct creation of a OSSL_DECODER from an OSSL_ALGORITHM.
    It isn't attached to any provider, and is only used internally, to
    simply catch any DER encoded object to be passed back to the
    object callback with no further checking.  This implementation
    becomes the last resort decoder, when all "normal"
    decodation attempts (i.e. those that are supposed to result
    in an OpenSSL object of some sort) have failed.

Because file_store_attach() uses BIO_tell(), we must also support
BIO_ctrl() as a libcrypto upcall.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/12587)

2 files changed, 4 insertions, 0 deletions

diff --git a/providers/common/include/prov/bio.h b/providers/common/include/prov/bio.h
index 3cef89ce18..9dd9f44bad 100644
--- a/providers/common/include/prov/bio.h
+++ b/providers/common/include/prov/bio.h
@@ -22,6 +22,7 @@ int ossl_prov_bio_write_ex(OSSL_CORE_BIO *bio, const void *data, size_t data_len
                            size_t *written);
 int ossl_prov_bio_gets(OSSL_CORE_BIO *bio, char *buf, int size);
 int ossl_prov_bio_puts(OSSL_CORE_BIO *bio, const char *str);
+int ossl_prov_bio_ctrl(OSSL_CORE_BIO *bio, int cmd, long num, void *ptr);
 int ossl_prov_bio_free(OSSL_CORE_BIO *bio);
 int ossl_prov_bio_vprintf(OSSL_CORE_BIO *bio, const char *format, va_list ap);
 int ossl_prov_bio_printf(OSSL_CORE_BIO *bio, const char *format, ...);
diff --git a/providers/common/include/prov/providercommonerr.h b/providers/common/include/prov/providercommonerr.h
index 4c356fc5c6..82eea21049 100644
--- a/providers/common/include/prov/providercommonerr.h
+++ b/providers/common/include/prov/providercommonerr.h
@@ -139,12 +139,14 @@ int ERR_load_PROV_strings(void);
 # define PROV_R_OUTPUT_BUFFER_TOO_SMALL                   106
 # define PROV_R_PARENT_LOCKING_NOT_ENABLED                182
 # define PROV_R_PARENT_STRENGTH_TOO_WEAK                  194
+# define PROV_R_PATH_MUST_BE_ABSOLUTE                     219
 # define PROV_R_PERSONALISATION_STRING_TOO_LONG           195
 # define PROV_R_PSS_SALTLEN_TOO_SMALL                     172
 # define PROV_R_READ_KEY                                  159
 # define PROV_R_REQUEST_TOO_LARGE_FOR_DRBG                196
 # define PROV_R_REQUIRE_CTR_MODE_CIPHER                   206
 # define PROV_R_RESEED_ERROR                              197
+# define PROV_R_SEARCH_ONLY_SUPPORTED_FOR_DIRECTORIES     222
 # define PROV_R_SELF_TEST_KAT_FAILURE                     215
 # define PROV_R_SELF_TEST_POST_FAILURE                    216
 # define PROV_R_TAG_NOTSET                                119
@@ -165,6 +167,7 @@ int ERR_load_PROV_strings(void);
 # define PROV_R_UNSUPPORTED_KEY_SIZE                      153
 # define PROV_R_UNSUPPORTED_MAC_TYPE                      137
 # define PROV_R_UNSUPPORTED_NUMBER_OF_ROUNDS              152
+# define PROV_R_URI_AUTHORITY_UNSUPPORTED                 223
 # define PROV_R_VALUE_ERROR                               138
 # define PROV_R_WRONG_FINAL_BLOCK_LENGTH                  107
 # define PROV_R_WRONG_OUTPUT_BUFFER_SIZE                  139