TLS fixes for CBC mode and no-deprecated

Reviewed-by: Ben Kaduk <kaduk@mit.edu>
(Merged from https://github.com/openssl/openssl/pull/11961)

ssl/build.info

@@ -23,7 +23,7 @@ SOURCE[../libssl]=\
         pqueue.c ../crypto/packet.c \
         statem/statem_srvr.c statem/statem_clnt.c  s3_lib.c  s3_enc.c record/rec_layer_s3.c \
         statem/statem_lib.c statem/extensions.c statem/extensions_srvr.c \
-        statem/extensions_clnt.c statem/extensions_cust.c s3_cbc.c s3_msg.c \
+        statem/extensions_clnt.c statem/extensions_cust.c s3_msg.c \
         methods.c   t1_lib.c  t1_enc.c tls13_enc.c \
         d1_lib.c  record/rec_layer_d1.c d1_msg.c \
         statem/statem_dtls.c d1_srtp.c \
@@ -34,6 +34,9 @@ SOURCE[../libssl]=\
         record/ssl3_buffer.c record/ssl3_record.c record/dtls1_bitmap.c \
         statem/statem.c record/ssl3_record_tls13.c record/tls_pad.c \
         $KTLSSRC
+IF[{- !$disabled{'deprecated-3.0'} -}]
+  SOURCE[../libssl]=s3_cbc.c
+ENDIF
 DEFINE[../libssl]=$AESDEF
 
 SOURCE[../providers/libcommon.a]=record/tls_pad.c

ssl/record/ssl3_record.c

@@ -1307,6 +1307,25 @@ int tls1_enc(SSL *s, SSL3_RECORD *recs, size_t n_recs, int sending,
     return 1;
 }
 
+/*
+ * ssl3_cbc_record_digest_supported returns 1 iff |ctx| uses a hash function
+ * which ssl3_cbc_digest_record supports.
+ */
+char ssl3_cbc_record_digest_supported(const EVP_MD_CTX *ctx)
+{
+    switch (EVP_MD_CTX_type(ctx)) {
+    case NID_md5:
+    case NID_sha1:
+    case NID_sha224:
+    case NID_sha256:
+    case NID_sha384:
+    case NID_sha512:
+        return 1;
+    default:
+        return 0;
+    }
+}
+
 int n_ssl3_mac(SSL *ssl, SSL3_RECORD *rec, unsigned char *md, int sending)
 {
     unsigned char *mac_sec, *seq;

ssl/s3_cbc.c

@@ -31,7 +31,6 @@
 #include <openssl/sha.h>
 
 char ssl3_cbc_record_digest_supported(const EVP_MD_CTX *ctx);
-#ifndef OPENSSL_NO_DEPRECATED_3_0
 int ssl3_cbc_digest_record(const EVP_MD *md,
                            unsigned char *md_out,
                            size_t *md_out_size,
@@ -129,31 +128,10 @@ static void tls1_sha512_final_raw(void *ctx, unsigned char *md_out)
         l2n8(sha512->h[i], md_out);
     }
 }
-#endif
 
 #undef  LARGEST_DIGEST_CTX
 #define LARGEST_DIGEST_CTX SHA512_CTX
 
-/*
- * ssl3_cbc_record_digest_supported returns 1 iff |ctx| uses a hash function
- * which ssl3_cbc_digest_record supports.
- */
-char ssl3_cbc_record_digest_supported(const EVP_MD_CTX *ctx)
-{
-    switch (EVP_MD_CTX_type(ctx)) {
-    case NID_md5:
-    case NID_sha1:
-    case NID_sha224:
-    case NID_sha256:
-    case NID_sha384:
-    case NID_sha512:
-        return 1;
-    default:
-        return 0;
-    }
-}
-
-#ifndef OPENSSL_NO_DEPRECATED_3_0
 /*-
  * ssl3_cbc_digest_record computes the MAC of a decrypted, padded SSLv3/TLS
  * record.
@@ -526,4 +504,3 @@ int ssl3_cbc_digest_record(const EVP_MD *md,
     EVP_MD_CTX_free(md_ctx);
     return ret;
 }
-#endif