Move MD2, MD4 and MD5 digests completely to the providers

This leaves minimal implementations of EVP_md2, EVP_md4, EVP_md5 and
EVP_mdc2, that are now only there to provide a name for implicit fetches.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10164)

9 files changed, 155 insertions, 223 deletions

diff --git a/crypto/evp/build.info b/crypto/evp/build.info
index aef0031d3d..f2c798b703 100644
--- a/crypto/evp/build.info
+++ b/crypto/evp/build.info
@@ -7,8 +7,7 @@ SOURCE[../../libcrypto]=$COMMON\
         e_des.c e_bf.c e_idea.c e_des3.c e_camellia.c\
         e_rc4.c e_aes.c names.c e_seed.c e_aria.c e_sm4.c \
         e_xcbc_d.c e_rc2.c e_cast.c e_rc5.c \
-        m_null.c m_md2.c m_md4.c m_md5.c m_wp.c \
-        m_mdc2.c m_ripemd.c \
+        m_null.c m_wp.c m_ripemd.c \
         p_open.c p_seal.c p_sign.c p_verify.c p_lib.c p_enc.c p_dec.c \
         bio_md.c bio_b64.c bio_enc.c evp_err.c e_null.c \
         c_allc.c c_alld.c bio_ok.c \
@@ -19,6 +18,20 @@ SOURCE[../../libcrypto]=$COMMON\
         e_chacha20_poly1305.c \
         pkey_mac.c exchange.c \
         legacy_sha.c legacy_md5_sha1.c
+
+IF[{- !$disabled{md2} -}]
+  SOURCE[../../libcrypto]=legacy_md2.c
+ENDIF
+IF[{- !$disabled{md4} -}]
+  SOURCE[../../libcrypto]=legacy_md4.c
+ENDIF
+IF[{- !$disabled{md5} -}]
+  SOURCE[../../libcrypto]=legacy_md5.c
+ENDIF
+IF[{- !$disabled{mdc2} -}]
+  SOURCE[../../libcrypto]=legacy_mdc2.c
+ENDIF
+
 SOURCE[../../providers/libfips.a]=$COMMON
 
 INCLUDE[e_aes.o]=.. ../modes
diff --git a/crypto/evp/legacy_md2.c b/crypto/evp/legacy_md2.c
new file mode 100644
index 0000000000..d399095f47
--- /dev/null
+++ b/crypto/evp/legacy_md2.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/opensslconf.h>
+
+#ifndef OPENSSL_NO_MD2
+
+# include <openssl/md2.h>
+# include "crypto/evp.h"
+
+static const EVP_MD md2_md = {
+    NID_md2,
+    NID_md2WithRSAEncryption,
+    MD2_DIGEST_LENGTH,
+    0,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    MD2_BLOCK,
+};
+
+const EVP_MD *EVP_md2(void)
+{
+    return &md2_md;
+}
+
+#endif /* OPENSSL_NO_MD2 */
diff --git a/crypto/evp/legacy_md4.c b/crypto/evp/legacy_md4.c
new file mode 100644
index 0000000000..fa57e98b78
--- /dev/null
+++ b/crypto/evp/legacy_md4.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/opensslconf.h>
+
+#ifndef OPENSSL_NO_MD4
+
+# include <openssl/md4.h>
+# include "crypto/evp.h"
+
+static const EVP_MD md4_md = {
+    NID_md4,
+    NID_md4WithRSAEncryption,
+    MD4_DIGEST_LENGTH,
+    0,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    MD4_CBLOCK,
+};
+
+const EVP_MD *EVP_md4(void)
+{
+    return &md4_md;
+}
+
+#endif /* OPENSSL_NO_MD4 */
diff --git a/crypto/evp/legacy_md5.c b/crypto/evp/legacy_md5.c
new file mode 100644
index 0000000000..f125b33f91
--- /dev/null
+++ b/crypto/evp/legacy_md5.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/opensslconf.h>
+
+#ifndef OPENSSL_NO_MD5
+
+# include <openssl/md5.h>
+# include "crypto/evp.h"
+
+static const EVP_MD md5_md = {
+    NID_md5,
+    NID_md5WithRSAEncryption,
+    MD5_DIGEST_LENGTH,
+    0,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    MD5_CBLOCK,
+};
+
+const EVP_MD *EVP_md5(void)
+{
+    return &md5_md;
+}
+
+#endif /* OPENSSL_NO_MD5 */
diff --git a/crypto/evp/legacy_mdc2.c b/crypto/evp/legacy_mdc2.c
new file mode 100644
index 0000000000..5b51b015ea
--- /dev/null
+++ b/crypto/evp/legacy_mdc2.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/opensslconf.h>
+
+#ifndef OPENSSL_NO_MDC2
+
+# include <openssl/mdc2.h>
+# include "crypto/evp.h"
+
+static const EVP_MD mdc2_md = {
+    NID_mdc2,
+    NID_mdc2WithRSA,
+    MDC2_DIGEST_LENGTH,
+    0,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    MDC2_BLOCK,
+};
+
+const EVP_MD *EVP_mdc2(void)
+{
+    return &mdc2_md;
+}
+
+#endif /* OPENSSL_NO_MDC2 */
diff --git a/crypto/evp/m_md2.c b/crypto/evp/m_md2.c
deleted file mode 100644
index a8a0af96aa..0000000000
--- a/crypto/evp/m_md2.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License").  You may not use
- * this file except in compliance with the License.  You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-#include <stdio.h>
-#include "internal/cryptlib.h"
-
-#ifndef OPENSSL_NO_MD2
-
-# include <openssl/evp.h>
-# include <openssl/objects.h>
-# include <openssl/x509.h>
-# include <openssl/md2.h>
-# include <openssl/rsa.h>
-
-#include "crypto/evp.h"
-
-static int init(EVP_MD_CTX *ctx)
-{
-    return MD2_Init(EVP_MD_CTX_md_data(ctx));
-}
-
-static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
-{
-    return MD2_Update(EVP_MD_CTX_md_data(ctx), data, count);
-}
-
-static int final(EVP_MD_CTX *ctx, unsigned char *md)
-{
-    return MD2_Final(md, EVP_MD_CTX_md_data(ctx));
-}
-
-static const EVP_MD md2_md = {
-    NID_md2,
-    NID_md2WithRSAEncryption,
-    MD2_DIGEST_LENGTH,
-    0,
-    init,
-    update,
-    final,
-    NULL,
-    NULL,
-    MD2_BLOCK,
-    sizeof(EVP_MD *) + sizeof(MD2_CTX),
-};
-
-const EVP_MD *EVP_md2(void)
-{
-    return &md2_md;
-}
-#endif
diff --git a/crypto/evp/m_md4.c b/crypto/evp/m_md4.c
deleted file mode 100644
index 9638213de7..0000000000
--- a/crypto/evp/m_md4.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License").  You may not use
- * this file except in compliance with the License.  You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-#include <stdio.h>
-#include "internal/cryptlib.h"
-
-#ifndef OPENSSL_NO_MD4
-
-# include <openssl/evp.h>
-# include <openssl/objects.h>
-# include <openssl/x509.h>
-# include <openssl/md4.h>
-# include <openssl/rsa.h>
-# include "crypto/evp.h"
-
-static int init(EVP_MD_CTX *ctx)
-{
-    return MD4_Init(EVP_MD_CTX_md_data(ctx));
-}
-
-static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
-{
-    return MD4_Update(EVP_MD_CTX_md_data(ctx), data, count);
-}
-
-static int final(EVP_MD_CTX *ctx, unsigned char *md)
-{
-    return MD4_Final(md, EVP_MD_CTX_md_data(ctx));
-}
-
-static const EVP_MD md4_md = {
-    NID_md4,
-    NID_md4WithRSAEncryption,
-    MD4_DIGEST_LENGTH,
-    0,
-    init,
-    update,
-    final,
-    NULL,
-    NULL,
-    MD4_CBLOCK,
-    sizeof(EVP_MD *) + sizeof(MD4_CTX),
-};
-
-const EVP_MD *EVP_md4(void)
-{
-    return &md4_md;
-}
-#endif
diff --git a/crypto/evp/m_md5.c b/crypto/evp/m_md5.c
deleted file mode 100644
index d817982488..0000000000
--- a/crypto/evp/m_md5.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License").  You may not use
- * this file except in compliance with the License.  You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-#include <stdio.h>
-#include "internal/cryptlib.h"
-
-#ifndef OPENSSL_NO_MD5
-
-# include <openssl/evp.h>
-# include <openssl/objects.h>
-# include <openssl/x509.h>
-# include <openssl/md5.h>
-# include <openssl/rsa.h>
-# include "crypto/evp.h"
-
-static int init(EVP_MD_CTX *ctx)
-{
-    return MD5_Init(EVP_MD_CTX_md_data(ctx));
-}
-
-static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
-{
-    return MD5_Update(EVP_MD_CTX_md_data(ctx), data, count);
-}
-
-static int final(EVP_MD_CTX *ctx, unsigned char *md)
-{
-    return MD5_Final(md, EVP_MD_CTX_md_data(ctx));
-}
-
-static const EVP_MD md5_md = {
-    NID_md5,
-    NID_md5WithRSAEncryption,
-    MD5_DIGEST_LENGTH,
-    0,
-    init,
-    update,
-    final,
-    NULL,
-    NULL,
-    MD5_CBLOCK,
-    sizeof(EVP_MD *) + sizeof(MD5_CTX),
-};
-
-const EVP_MD *EVP_md5(void)
-{
-    return &md5_md;
-}
-#endif
diff --git a/crypto/evp/m_mdc2.c b/crypto/evp/m_mdc2.c
deleted file mode 100644
index fdc689e115..0000000000
--- a/crypto/evp/m_mdc2.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License").  You may not use
- * this file except in compliance with the License.  You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-#include <stdio.h>
-#include "internal/cryptlib.h"
-
-#ifndef OPENSSL_NO_MDC2
-
-# include <openssl/evp.h>
-# include <openssl/objects.h>
-# include <openssl/x509.h>
-# include <openssl/mdc2.h>
-# include <openssl/rsa.h>
-# include "crypto/evp.h"
-
-static int init(EVP_MD_CTX *ctx)
-{
-    return MDC2_Init(EVP_MD_CTX_md_data(ctx));
-}
-
-static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
-{
-    return MDC2_Update(EVP_MD_CTX_md_data(ctx), data, count);
-}
-
-static int final(EVP_MD_CTX *ctx, unsigned char *md)
-{
-    return MDC2_Final(md, EVP_MD_CTX_md_data(ctx));
-}
-
-static const EVP_MD mdc2_md = {
-    NID_mdc2,
-    NID_mdc2WithRSA,
-    MDC2_DIGEST_LENGTH,
-    0,
-    init,
-    update,
-    final,
-    NULL,
-    NULL,
-    MDC2_BLOCK,
-    sizeof(EVP_MD *) + sizeof(MDC2_CTX),
-};
-
-const EVP_MD *EVP_mdc2(void)
-{
-    return &mdc2_md;
-}
-#endif