From 37801dca09e004c214604ae66323a628e100258d Mon Sep 17 00:00:00 2001
From: Jonathan McDowell <noodles@earth.li>
Date: Tue, 16 Apr 2019 07:48:24 +0100
Subject: [PATCH] Assume if we have Nettle it has all the hashes we need

Older versions of Nettle didn't support the SHA2 functions fully so we
checked for their existence. Switch to assuming they're present if we
have Nettle at all.
---
 sigcheck.c | 49 +++++++++----------------------------------------
 1 file changed, 9 insertions(+), 40 deletions(-)

diff --git a/sigcheck.c b/sigcheck.c
index 2401665..0bf6ae1 100644
--- a/sigcheck.c
+++ b/sigcheck.c
@@ -46,19 +46,11 @@ int check_packet_sighash(struct openpgp_publickey *key,
 	struct sha1_ctx sha1_context;
 	struct sha1x_ctx sha1x_context;
 	struct md5_ctx md5_context;
-#ifdef NETTLE_WITH_RIPEMD160
+#ifdef HAVE_NETTLE
 	struct ripemd160_ctx ripemd160_context;
-#endif
-#ifdef NETTLE_WITH_SHA224
 	struct sha224_ctx sha224_context;
-#endif
-#ifdef NETTLE_WITH_SHA256
 	struct sha256_ctx sha256_context;
-#endif
-#ifdef NETTLE_WITH_SHA384
 	struct sha384_ctx sha384_context;
-#endif
-#ifdef NETTLE_WITH_SHA512
 	struct sha512_ctx sha512_context;
 #endif
 	uint8_t keyheader[3];
@@ -212,8 +204,15 @@ int check_packet_sighash(struct openpgp_publickey *key,
 		}
 		sha1_digest(&sha1_context, 20, hash);
 		break;
+	case OPENPGP_HASH_SHA1X:
+		sha1x_init(&sha1x_context);
+		for (i = 0; i < chunks; i++) {
+			sha1x_update(&sha1x_context, hashlen[i], hashdata[i]);
+		}
+		sha1x_digest(&sha1x_context, 20, hash);
+		break;
+#ifdef HAVE_NETTLE
 	case OPENPGP_HASH_RIPEMD160:
-#ifdef NETTLE_WITH_RIPEMD160
 		ripemd160_init(&ripemd160_context);
 		for (i = 0; i < chunks; i++) {
 			ripemd160_update(&ripemd160_context, hashlen[i],
@@ -222,19 +221,7 @@ int check_packet_sighash(struct openpgp_publickey *key,
 		ripemd160_digest(&ripemd160_context, RIPEMD160_DIGEST_SIZE,
 			hash);
 		break;
-#else
-		logthing(LOGTHING_INFO, "RIPEMD160 support not available.");
-		return -1;
-#endif
-	case OPENPGP_HASH_SHA1X:
-		sha1x_init(&sha1x_context);
-		for (i = 0; i < chunks; i++) {
-			sha1x_update(&sha1x_context, hashlen[i], hashdata[i]);
-		}
-		sha1x_digest(&sha1x_context, 20, hash);
-		break;
 	case OPENPGP_HASH_SHA224:
-#ifdef NETTLE_WITH_SHA224
 		sha224_init(&sha224_context);
 		for (i = 0; i < chunks; i++) {
 			sha224_update(&sha224_context, hashlen[i],
@@ -242,12 +229,7 @@ int check_packet_sighash(struct openpgp_publickey *key,
 		}
 		sha224_digest(&sha224_context, SHA224_DIGEST_SIZE, hash);
 		break;
-#else
-		logthing(LOGTHING_INFO, "SHA224 support not available.");
-		return -1;
-#endif
 	case OPENPGP_HASH_SHA256:
-#ifdef NETTLE_WITH_SHA256
 		sha256_init(&sha256_context);
 		for (i = 0; i < chunks; i++) {
 			sha256_update(&sha256_context, hashlen[i],
@@ -255,12 +237,7 @@ int check_packet_sighash(struct openpgp_publickey *key,
 		}
 		sha256_digest(&sha256_context, SHA256_DIGEST_SIZE, hash);
 		break;
-#else
-		logthing(LOGTHING_INFO, "SHA256 support not available.");
-		return -1;
-#endif
 	case OPENPGP_HASH_SHA384:
-#ifdef NETTLE_WITH_SHA384
 		sha384_init(&sha384_context);
 		for (i = 0; i < chunks; i++) {
 			sha384_update(&sha384_context, hashlen[i],
@@ -268,12 +245,7 @@ int check_packet_sighash(struct openpgp_publickey *key,
 		}
 		sha384_digest(&sha384_context, SHA384_DIGEST_SIZE, hash);
 		break;
-#else
-		logthing(LOGTHING_INFO, "SHA384 support not available.");
-		return -1;
-#endif
 	case OPENPGP_HASH_SHA512:
-#ifdef NETTLE_WITH_SHA512
 		sha512_init(&sha512_context);
 		for (i = 0; i < chunks; i++) {
 			sha512_update(&sha512_context, hashlen[i],
@@ -281,9 +253,6 @@ int check_packet_sighash(struct openpgp_publickey *key,
 		}
 		sha512_digest(&sha512_context, SHA512_DIGEST_SIZE, hash);
 		break;
-#else
-		logthing(LOGTHING_INFO, "SHA512 support not available.");
-		return -1;
 #endif
 	default:
 		get_keyid(key, &keyid);
-- 
2.39.2