Fold i2a_ASN1_ENUMERATED into i2a_ASN1_INTEGER.

They do the same thing, except i2a_ASN1_ENUMERATED has a bug and doesn't
handle negative values.

Change-Id: Ifb22aa4e4d6c441a39cf6b3702cce7f6d12a94ae
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/49929
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/crypto/CMakeLists.txt b/crypto/CMakeLists.txt
index 990df00..9c724b7 100644
--- a/crypto/CMakeLists.txt
+++ b/crypto/CMakeLists.txt
@@ -220,7 +220,6 @@
   asn1/asn1_lib.c
   asn1/asn1_par.c
   asn1/asn_pack.c
-  asn1/f_enum.c
   asn1/f_int.c
   asn1/f_string.c
   asn1/tasn_dec.c
diff --git a/crypto/asn1/f_enum.c b/crypto/asn1/f_enum.c
deleted file mode 100644
index e28755d..0000000
--- a/crypto/asn1/f_enum.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
-#include <openssl/asn1.h>
-
-#include <openssl/bio.h>
-
-/* Based on a_int.c: equivalent ENUMERATED functions */
-
-int i2a_ASN1_ENUMERATED(BIO *bp, const ASN1_ENUMERATED *a)
-{
-    int i, n = 0;
-    static const char *h = "0123456789ABCDEF";
-    char buf[2];
-
-    if (a == NULL)
-        return (0);
-
-    if (a->length == 0) {
-        if (BIO_write(bp, "00", 2) != 2)
-            goto err;
-        n = 2;
-    } else {
-        for (i = 0; i < a->length; i++) {
-            if ((i != 0) && (i % 35 == 0)) {
-                if (BIO_write(bp, "\\\n", 2) != 2)
-                    goto err;
-                n += 2;
-            }
-            buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f];
-            buf[1] = h[((unsigned char)a->data[i]) & 0x0f];
-            if (BIO_write(bp, buf, 2) != 2)
-                goto err;
-            n += 2;
-        }
-    }
-    return (n);
- err:
-    return (-1);
-}
diff --git a/crypto/asn1/f_int.c b/crypto/asn1/f_int.c
index 25338d8..c259788 100644
--- a/crypto/asn1/f_int.c
+++ b/crypto/asn1/f_int.c
@@ -95,3 +95,8 @@
  err:
     return (-1);
 }
+
+int i2a_ASN1_ENUMERATED(BIO *bp, const ASN1_ENUMERATED *a)
+{
+    return i2a_ASN1_INTEGER(bp, a);
+}