From 36a03132634a17c667c0fac0a8e1519b3d1b71c6 Mon Sep 17 00:00:00 2001
From: Matt Johnston <matt@ucc.asn.au>
Date: Mon, 28 Nov 2022 21:12:23 +0800
Subject: Add #if DROPBEAR_RSA guards

Fixes building with DROPBEAR_RSA disabled.
Closes #197
---
 signkey.c    | 8 +++++++-
 signkey.h    | 2 ++
 sysoptions.h | 5 +----
 3 files changed, 10 insertions(+), 5 deletions(-)

--- a/signkey.c
+++ b/signkey.c
@@ -120,6 +120,7 @@ enum signkey_type signkey_type_from_name
 /* Special case for rsa-sha2-256. This could be generalised if more 
    signature names are added that aren't 1-1 with public key names */
 const char* signature_name_from_type(enum signature_type type, unsigned int *namelen) {
+#if DROPBEAR_RSA
 #if DROPBEAR_RSA_SHA256
 	if (type == DROPBEAR_SIGNATURE_RSA_SHA256) {
 		if (namelen) {
@@ -136,11 +137,13 @@ const char* signature_name_from_type(enu
 		return SSH_SIGNKEY_RSA;
 	}
 #endif
+#endif /* DROPBEAR_RSA */
 	return signkey_name_from_type((enum signkey_type)type, namelen);
 }
 
 /* Returns DROPBEAR_SIGNATURE_NONE if none match */
 enum signature_type signature_type_from_name(const char* name, unsigned int namelen) {
+#if DROPBEAR_RSA
 #if DROPBEAR_RSA_SHA256
 	if (namelen == strlen(SSH_SIGNATURE_RSA_SHA256) 
 		&& memcmp(name, SSH_SIGNATURE_RSA_SHA256, namelen) == 0) {
@@ -153,10 +156,11 @@ enum signature_type signature_type_from_
 		return DROPBEAR_SIGNATURE_RSA_SHA1;
 	}
 #endif
+#endif /* DROPBEAR_RSA */
 	return (enum signature_type)signkey_type_from_name(name, namelen);
 }
 
-/* Returns the signature type from a key type. Must not be called 
+/* Returns the signature type from a key type. Must not be called
    with RSA keytype */
 enum signature_type signature_type_from_signkey(enum signkey_type keytype) {
 #if DROPBEAR_RSA
@@ -167,6 +171,7 @@ enum signature_type signature_type_from_
 }
 
 enum signkey_type signkey_type_from_signature(enum signature_type sigtype) {
+#if DROPBEAR_RSA
 #if DROPBEAR_RSA_SHA256
 	if (sigtype == DROPBEAR_SIGNATURE_RSA_SHA256) {
 		return DROPBEAR_SIGNKEY_RSA;
@@ -177,6 +182,7 @@ enum signkey_type signkey_type_from_sign
 		return DROPBEAR_SIGNKEY_RSA;
 	}
 #endif
+#endif /* DROPBEAR_RSA */
 	assert((int)sigtype < (int)DROPBEAR_SIGNKEY_NUM_NAMED);
 	return (enum signkey_type)sigtype;
 }
--- a/signkey.h
+++ b/signkey.h
@@ -79,12 +79,14 @@ enum signature_type {
 	DROPBEAR_SIGNATURE_SK_ED25519 = DROPBEAR_SIGNKEY_SK_ED25519,
 #endif
 #endif
+#if DROPBEAR_RSA
 #if DROPBEAR_RSA_SHA1
 	DROPBEAR_SIGNATURE_RSA_SHA1 = 100, /* ssh-rsa signature (sha1) */
 #endif
 #if DROPBEAR_RSA_SHA256
 	DROPBEAR_SIGNATURE_RSA_SHA256 = 101, /* rsa-sha2-256 signature. has a ssh-rsa key */
 #endif
+#endif /* DROPBEAR_RSA */
 	DROPBEAR_SIGNATURE_NONE = DROPBEAR_SIGNKEY_NONE,
 };
 
--- a/sysoptions.h
+++ b/sysoptions.h
@@ -137,7 +137,7 @@
 
 /* Debian doesn't define this in system headers */
 #if !defined(LTM_DESC) && (DROPBEAR_ECC)
-#define LTM_DESC 
+#define LTM_DESC
 #endif
 
 #define DROPBEAR_ECC_256 (DROPBEAR_ECC)
@@ -151,9 +151,6 @@
  * signing operations slightly slower. */
 #define DROPBEAR_RSA_BLINDING 1
 
-#ifndef DROPBEAR_RSA_SHA1
-#define DROPBEAR_RSA_SHA1 DROPBEAR_RSA
-#endif
 #ifndef DROPBEAR_RSA_SHA256
 #define DROPBEAR_RSA_SHA256 DROPBEAR_RSA
 #endif