[crypto] Support SHA-{224,384,512} in X.509 certificates

Add support for SHA-224, SHA-384, and SHA-512 as digest algorithms in
X.509 certificates, and allow the choice of public-key, cipher, and
digest algorithms to be configured at build time via config/crypto.h.

Originally-implemented-by: Tufan Karadere <tufank@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

2 files changed, 109 insertions, 0 deletions

diff --git a/src/config/config_crypto.c b/src/config/config_crypto.c
new file mode 100644
index 00000000..1e125d8a
--- /dev/null
+++ b/src/config/config_crypto.c
@@ -0,0 +1,76 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <config/crypto.h>
+
+/** @file
+ *
+ * Cryptographic configuration
+ *
+ * Cryptographic configuration is slightly messy since we need to drag
+ * in objects based on combinations of build options.
+ */
+
+PROVIDE_REQUIRING_SYMBOL();
+
+/* RSA and MD5 */
+#if defined ( CRYPTO_PUBKEY_RSA ) && defined ( CRYPTO_DIGEST_MD5 )
+REQUIRE_OBJECT ( rsa_md5 );
+#endif
+
+/* RSA and SHA-1 */
+#if defined ( CRYPTO_PUBKEY_RSA ) && defined ( CRYPTO_DIGEST_SHA1 )
+REQUIRE_OBJECT ( rsa_sha1 );
+#endif
+
+/* RSA and SHA-224 */
+#if defined ( CRYPTO_PUBKEY_RSA ) && defined ( CRYPTO_DIGEST_SHA224 )
+REQUIRE_OBJECT ( rsa_sha224 );
+#endif
+
+/* RSA and SHA-256 */
+#if defined ( CRYPTO_PUBKEY_RSA ) && defined ( CRYPTO_DIGEST_SHA256 )
+REQUIRE_OBJECT ( rsa_sha256 );
+#endif
+
+/* RSA and SHA-384 */
+#if defined ( CRYPTO_PUBKEY_RSA ) && defined ( CRYPTO_DIGEST_SHA384 )
+REQUIRE_OBJECT ( rsa_sha384 );
+#endif
+
+/* RSA and SHA-512 */
+#if defined ( CRYPTO_PUBKEY_RSA ) && defined ( CRYPTO_DIGEST_SHA512 )
+REQUIRE_OBJECT ( rsa_sha512 );
+#endif
+
+/* RSA, AES-CBC, and SHA-1 */
+#if defined ( CRYPTO_PUBKEY_RSA ) && defined ( CRYPTO_CIPHER_AES_CBC ) && \
+    defined ( CRYPTO_DIGEST_SHA1 )
+REQUIRE_OBJECT ( rsa_aes_cbc_sha1 );
+#endif
+
+/* RSA, AES-CBC, and SHA-256 */
+#if defined ( CRYPTO_PUBKEY_RSA ) && defined ( CRYPTO_CIPHER_AES_CBC ) && \
+    defined ( CRYPTO_DIGEST_SHA256 )
+REQUIRE_OBJECT ( rsa_aes_cbc_sha256 );
+#endif
diff --git a/src/config/crypto.h b/src/config/crypto.h
index 9e1f8b2f..bccfc04b 100644
--- a/src/config/crypto.h
+++ b/src/config/crypto.h
@@ -9,6 +9,39 @@
 
 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
+/** RSA public-key algorithm */
+#define CRYPTO_PUBKEY_RSA
+
+/** AES-CBC block cipher */
+#define CRYPTO_CIPHER_AES_CBC
+
+/** MD5 digest algorithm
+ *
+ * Note that use of MD5 is implicit when using TLSv1.1 or earlier.
+ */
+#define CRYPTO_DIGEST_MD5
+
+/** SHA-1 digest algorithm
+ *
+ * Note that use of SHA-1 is implicit when using TLSv1.1 or earlier.
+ */
+#define CRYPTO_DIGEST_SHA1
+
+/** SHA-224 digest algorithm */
+#define CRYPTO_DIGEST_SHA224
+
+/** SHA-256 digest algorithm
+ *
+ * Note that use of SHA-256 is implicit when using TLSv1.2.
+ */
+#define CRYPTO_DIGEST_SHA256
+
+/** SHA-384 digest algorithm */
+#define CRYPTO_DIGEST_SHA384
+
+/** SHA-512 digest algorithm */
+#define CRYPTO_DIGEST_SHA512
+
 /** Margin of error (in seconds) allowed in signed timestamps
  *
  * We default to allowing a reasonable margin of error: 12 hours to