From a05dc378e391b868a694914bd763d057930f076a Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Fri, 1 Mar 2013 21:59:12 -0500
Subject: [PATCH] Remove unused HMAC-SHA1 function

(We're not adding any new SHA1 instances in our protocols, so this
should never actually be needed.)
---
 src/common/crypto.c    | 15 ---------------
 src/common/crypto.h    |  3 ---
 src/test/test_crypto.c | 28 ----------------------------
 3 files changed, 46 deletions(-)

diff --git a/src/common/crypto.c b/src/common/crypto.c
index 22d57c7c8a..8d374004ce 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -1631,21 +1631,6 @@ crypto_digest_assign(crypto_digest_t *into,
   memcpy(into,from,sizeof(crypto_digest_t));
 }
 
-/** Compute the HMAC-SHA-1 of the <b>msg_len</b> bytes in <b>msg</b>, using
- * the <b>key</b> of length <b>key_len</b>.  Store the DIGEST_LEN-byte result
- * in <b>hmac_out</b>.
- */
-void
-crypto_hmac_sha1(char *hmac_out,
-                 const char *key, size_t key_len,
-                 const char *msg, size_t msg_len)
-{
-  tor_assert(key_len < INT_MAX);
-  tor_assert(msg_len < INT_MAX);
-  HMAC(EVP_sha1(), key, (int)key_len, (unsigned char*)msg, (int)msg_len,
-       (unsigned char*)hmac_out, NULL);
-}
-
 /** Compute the HMAC-SHA-256 of the <b>msg_len</b> bytes in <b>msg</b>, using
  * the <b>key</b> of length <b>key_len</b>.  Store the DIGEST256_LEN-byte
  * result in <b>hmac_out</b>.
diff --git a/src/common/crypto.h b/src/common/crypto.h
index 12fcfae27e..1976549610 100644
--- a/src/common/crypto.h
+++ b/src/common/crypto.h
@@ -218,9 +218,6 @@ void crypto_digest_get_digest(crypto_digest_t *digest,
 crypto_digest_t *crypto_digest_dup(const crypto_digest_t *digest);
 void crypto_digest_assign(crypto_digest_t *into,
                           const crypto_digest_t *from);
-void crypto_hmac_sha1(char *hmac_out,
-                      const char *key, size_t key_len,
-                      const char *msg, size_t msg_len);
 void crypto_hmac_sha256(char *hmac_out,
                         const char *key, size_t key_len,
                         const char *msg, size_t msg_len);
diff --git a/src/test/test_crypto.c b/src/test/test_crypto.c
index afb338a69c..1f12c87ace 100644
--- a/src/test/test_crypto.c
+++ b/src/test/test_crypto.c
@@ -269,34 +269,6 @@ test_crypto_sha(void)
                        "96177A9CB410FF61F20015AD");
   tt_int_op(i, ==, 0);
 
-  /* Test HMAC-SHA-1 with test cases from RFC2202. */
-
-  /* Case 1. */
-  memset(key, 0x0b, 20);
-  crypto_hmac_sha1(digest, key, 20, "Hi There", 8);
-  test_streq(hex_str(digest, 20),
-             "B617318655057264E28BC0B6FB378C8EF146BE00");
-  /* Case 2. */
-  crypto_hmac_sha1(digest, "Jefe", 4, "what do ya want for nothing?", 28);
-  test_streq(hex_str(digest, 20),
-             "EFFCDF6AE5EB2FA2D27416D5F184DF9C259A7C79");
-
-  /* Case 4. */
-  base16_decode(key, 25,
-                "0102030405060708090a0b0c0d0e0f10111213141516171819", 50);
-  memset(data, 0xcd, 50);
-  crypto_hmac_sha1(digest, key, 25, data, 50);
-  test_streq(hex_str(digest, 20),
-             "4C9007F4026250C6BC8414F9BF50C86C2D7235DA");
-
-  /* Case 5. */
-  memset(key, 0xaa, 80);
-  crypto_hmac_sha1(digest, key, 80,
-                   "Test Using Larger Than Block-Size Key - Hash Key First",
-                   54);
-  test_streq(hex_str(digest, 20),
-             "AA4AE5E15272D00E95705637CE8A3B55ED402112");
-
   /* Test HMAC-SHA256 with test cases from wikipedia and RFC 4231 */
 
   /* Case empty (wikipedia) */