Merge pull request #13 from gazoo74/fix-warnings

Fix warnings

27 files changed, 107 insertions, 107 deletions

diff --git a/buffer.c b/buffer.c
index d043bdb..1e5a864 100644
--- a/buffer.c
+++ b/buffer.c
@@ -203,10 +203,10 @@ unsigned char* buf_getwriteptr(buffer* buf, unsigned int len) {
 /* Return a null-terminated string, it is malloced, so must be free()ed
  * Note that the string isn't checked for null bytes, hence the retlen
  * may be longer than what is returned by strlen */
-unsigned char* buf_getstring(buffer* buf, unsigned int *retlen) {
+char* buf_getstring(buffer* buf, unsigned int *retlen) {
 
 	unsigned int len;
-	unsigned char* ret;
+	char* ret;
 	len = buf_getint(buf);
 	if (len > MAX_STRING_LEN) {
 		dropbear_exit("String too long");
@@ -262,16 +262,16 @@ void buf_putint(buffer* buf, int unsigned val) {
 }
 
 /* put a SSH style string into the buffer, increasing buffer len if required */
-void buf_putstring(buffer* buf, const unsigned char* str, unsigned int len) {
+void buf_putstring(buffer* buf, const char* str, unsigned int len) {
 	
 	buf_putint(buf, len);
-	buf_putbytes(buf, str, len);
+	buf_putbytes(buf, (const unsigned char*)str, len);
 
 }
 
 /* puts an entire buffer as a SSH string. ignore pos of buf_str. */
 void buf_putbufstring(buffer *buf, const buffer* buf_str) {
-	buf_putstring(buf, buf_str->data, buf_str->len);
+	buf_putstring(buf, (const char*)buf_str->data, buf_str->len);
 }
 
 /* put the set of len bytes into the buffer, incrementing the pos, increasing
diff --git a/buffer.h b/buffer.h
index 6ab53d7..c32b84b 100644
--- a/buffer.h
+++ b/buffer.h
@@ -56,11 +56,11 @@ unsigned char buf_getbool(buffer* buf);
 void buf_putbyte(buffer* buf, unsigned char val);
 unsigned char* buf_getptr(buffer* buf, unsigned int len);
 unsigned char* buf_getwriteptr(buffer* buf, unsigned int len);
-unsigned char* buf_getstring(buffer* buf, unsigned int *retlen);
+char* buf_getstring(buffer* buf, unsigned int *retlen);
 buffer * buf_getstringbuf(buffer *buf);
 void buf_eatstring(buffer *buf);
 void buf_putint(buffer* buf, unsigned int val);
-void buf_putstring(buffer* buf, const unsigned char* str, unsigned int len);
+void buf_putstring(buffer* buf, const char* str, unsigned int len);
 void buf_putbufstring(buffer *buf, const buffer* buf_str);
 void buf_putbytes(buffer *buf, const unsigned char *bytes, unsigned int len);
 void buf_putmpint(buffer* buf, mp_int * mp);
diff --git a/cli-auth.c b/cli-auth.c
index 70ace65..3f3677a 100644
--- a/cli-auth.c
+++ b/cli-auth.c
@@ -43,9 +43,9 @@ void cli_auth_getmethods() {
 	TRACE(("enter cli_auth_getmethods"))
 	CHECKCLEARTOWRITE();
 	buf_putbyte(ses.writepayload, SSH_MSG_USERAUTH_REQUEST);
-	buf_putstring(ses.writepayload, cli_opts.username, 
+	buf_putstring(ses.writepayload, cli_opts.username,
 			strlen(cli_opts.username));
-	buf_putstring(ses.writepayload, SSH_SERVICE_CONNECTION, 
+	buf_putstring(ses.writepayload, SSH_SERVICE_CONNECTION,
 			SSH_SERVICE_CONNECTION_LEN);
 	buf_putstring(ses.writepayload, "none", 4); /* 'none' method */
 
@@ -75,7 +75,7 @@ void cli_auth_getmethods() {
 
 void recv_msg_userauth_banner() {
 
-	unsigned char* banner = NULL;
+	char* banner = NULL;
 	unsigned int bannerlen;
 	unsigned int i, linecount;
 
@@ -151,8 +151,8 @@ void recv_msg_userauth_specific_60() {
 
 void recv_msg_userauth_failure() {
 
-	unsigned char * methods = NULL;
-	unsigned char * tok = NULL;
+	char * methods = NULL;
+	char * tok = NULL;
 	unsigned int methlen = 0;
 	unsigned int partial = 0;
 	unsigned int i = 0;
diff --git a/cli-authinteract.c b/cli-authinteract.c
index a06c9ca..49d65a7 100644
--- a/cli-authinteract.c
+++ b/cli-authinteract.c
@@ -31,10 +31,10 @@
 
 #ifdef ENABLE_CLI_INTERACT_AUTH
 
-static unsigned char* get_response(unsigned char* prompt)
+static char* get_response(char* prompt)
 {
 	FILE* tty = NULL;
-	unsigned char* response = NULL;
+	char* response = NULL;
 	/* not a password, but a reasonable limit */
 	char buf[DROPBEAR_MAX_CLI_PASS];
 	char* ret = NULL;
@@ -50,13 +50,13 @@ static unsigned char* get_response(unsigned char* prompt)
 	}
 
 	if (ret == NULL) {
-		response = (unsigned char*)m_strdup("");
+		response = m_strdup("");
 	} else {
 		unsigned int buflen = strlen(buf);
 		/* fgets includes newlines */
 		if (buflen > 0 && buf[buflen-1] == '\n')
 			buf[buflen-1] = '\0';
-		response = (unsigned char*)m_strdup(buf);
+		response = m_strdup(buf);
 	}
 
 	m_burn(buf, sizeof(buf));
@@ -66,14 +66,14 @@ static unsigned char* get_response(unsigned char* prompt)
 
 void recv_msg_userauth_info_request() {
 
-	unsigned char *name = NULL;
-	unsigned char *instruction = NULL;
+	char *name = NULL;
+	char *instruction = NULL;
 	unsigned int num_prompts = 0;
 	unsigned int i;
 
-	unsigned char *prompt = NULL;
+	char *prompt = NULL;
 	unsigned int echo = 0;
-	unsigned char *response = NULL;
+	char *response = NULL;
 
 	TRACE(("enter recv_msg_recv_userauth_info_request"))
 
@@ -121,7 +121,7 @@ void recv_msg_userauth_info_request() {
 		echo = buf_getbool(ses.payload);
 
 		if (!echo) {
-			unsigned char* p = getpass_or_cancel(prompt);
+			char* p = getpass_or_cancel(prompt);
 			response = m_strdup(p);
 			m_burn(p, strlen(p));
 		} else {
@@ -153,7 +153,7 @@ void cli_auth_interactive() {
 			strlen(cli_opts.username));
 
 	/* service name */
-	buf_putstring(ses.writepayload, SSH_SERVICE_CONNECTION, 
+	buf_putstring(ses.writepayload, SSH_SERVICE_CONNECTION,
 			SSH_SERVICE_CONNECTION_LEN);
 
 	/* method */
diff --git a/cli-authpasswd.c b/cli-authpasswd.c
index 1e0bd41..3cf49a2 100644
--- a/cli-authpasswd.c
+++ b/cli-authpasswd.c
@@ -143,10 +143,10 @@ void cli_auth_password() {
 	buf_putstring(ses.writepayload, cli_opts.username,
 			strlen(cli_opts.username));
 
-	buf_putstring(ses.writepayload, SSH_SERVICE_CONNECTION, 
+	buf_putstring(ses.writepayload, SSH_SERVICE_CONNECTION,
 			SSH_SERVICE_CONNECTION_LEN);
 
-	buf_putstring(ses.writepayload, AUTH_METHOD_PASSWORD, 
+	buf_putstring(ses.writepayload, AUTH_METHOD_PASSWORD,
 			AUTH_METHOD_PASSWORD_LEN);
 
 	buf_putbyte(ses.writepayload, 0); /* FALSE - so says the spec */
diff --git a/cli-authpubkey.c b/cli-authpubkey.c
index cdef36e..d53178e 100644
--- a/cli-authpubkey.c
+++ b/cli-authpubkey.c
@@ -141,7 +141,7 @@ void cli_buf_put_sign(buffer* buf, sign_key *key, int type,
 static void send_msg_userauth_pubkey(sign_key *key, int type, int realsign) {
 
 	const char *algoname = NULL;
-	int algolen;
+	unsigned int algolen;
 	buffer* sigbuf = NULL;
 
 	TRACE(("enter send_msg_userauth_pubkey"))
@@ -152,10 +152,10 @@ static void send_msg_userauth_pubkey(sign_key *key, int type, int realsign) {
 	buf_putstring(ses.writepayload, cli_opts.username,
 			strlen(cli_opts.username));
 
-	buf_putstring(ses.writepayload, SSH_SERVICE_CONNECTION, 
+	buf_putstring(ses.writepayload, SSH_SERVICE_CONNECTION,
 			SSH_SERVICE_CONNECTION_LEN);
 
-	buf_putstring(ses.writepayload, AUTH_METHOD_PUBKEY, 
+	buf_putstring(ses.writepayload, AUTH_METHOD_PUBKEY,
 			AUTH_METHOD_PUBKEY_LEN);
 
 	buf_putbyte(ses.writepayload, realsign);
diff --git a/cli-chansession.c b/cli-chansession.c
index 57457d2..5e00149 100644
--- a/cli-chansession.c
+++ b/cli-chansession.c
@@ -56,7 +56,7 @@ const struct ChanType clichansess = {
 
 static void cli_chansessreq(struct Channel *channel) {
 
-	unsigned char* type = NULL;
+	char* type = NULL;
 	int wantreply;
 
 	TRACE(("enter cli_chansessreq"))
@@ -272,7 +272,7 @@ void cli_chansess_winchange() {
 
 static void send_chansess_pty_req(struct Channel *channel) {
 
-	unsigned char* term = NULL;
+	char* term = NULL;
 
 	TRACE(("enter send_chansess_pty_req"))
 
@@ -305,7 +305,7 @@ static void send_chansess_pty_req(struct Channel *channel) {
 
 static void send_chansess_shell_req(struct Channel *channel) {
 
-	unsigned char* reqtype = NULL;
+	char* reqtype = NULL;
 
 	TRACE(("enter send_chansess_shell_req"))
 
@@ -392,7 +392,7 @@ static const struct ChanType cli_chan_netcat = {
 
 void cli_send_netcat_request() {
 
-	const unsigned char* source_host = "127.0.0.1";
+	const char* source_host = "127.0.0.1";
 	const int source_port = 22;
 
 	TRACE(("enter cli_send_netcat_request"))
@@ -403,7 +403,7 @@ void cli_send_netcat_request() {
 		dropbear_exit("Couldn't open initial channel");
 	}
 
-	buf_putstring(ses.writepayload, cli_opts.netcat_host, 
+	buf_putstring(ses.writepayload, cli_opts.netcat_host,
 			strlen(cli_opts.netcat_host));
 	buf_putint(ses.writepayload, cli_opts.netcat_port);
 
diff --git a/cli-kex.c b/cli-kex.c
index a590157..e1924e1 100644
--- a/cli-kex.c
+++ b/cli-kex.c
@@ -79,7 +79,7 @@ void send_msg_kexdh_init() {
 				}
 				cli_ses.curve25519_param = gen_kexcurve25519_param();
 			}
-			buf_putstring(ses.writepayload, cli_ses.curve25519_param->pub, CURVE25519_LEN);
+			buf_putstring(ses.writepayload, (const char*)cli_ses.curve25519_param->pub, CURVE25519_LEN);
 #endif
 			break;
 	}
diff --git a/cli-session.c b/cli-session.c
index 7019e93..10244a7 100644
--- a/cli-session.c
+++ b/cli-session.c
@@ -374,10 +374,10 @@ static void cli_remoteclosed() {
 /* Operates in-place turning dirty (untrusted potentially containing control
  * characters) text into clean text. 
  * Note: this is safe only with ascii - other charsets could have problems. */
-void cleantext(unsigned char* dirtytext) {
+void cleantext(char* dirtytext) {
 
 	unsigned int i, j;
-	unsigned char c;
+	char c;
 
 	j = 0;
 	for (i = 0; dirtytext[i] != '\0'; i++) {
diff --git a/common-algo.c b/common-algo.c
index b1d4966..002ae66 100644
--- a/common-algo.c
+++ b/common-algo.c
@@ -325,10 +325,10 @@ void buf_put_algolist(buffer * buf, algo_type localalgos[]) {
 				buf_putbyte(algolist, ',');
 			donefirst = 1;
 			len = strlen(localalgos[i].name);
-			buf_putbytes(algolist, localalgos[i].name, len);
+			buf_putbytes(algolist, (const unsigned char *) localalgos[i].name, len);
 		}
 	}
-	buf_putstring(buf, algolist->data, algolist->len);
+	buf_putstring(buf, (const char*)algolist->data, algolist->len);
 	buf_free(algolist);
 }
 
@@ -341,12 +341,12 @@ algo_type * buf_match_algo(buffer* buf, algo_type localalgos[],
 		enum kexguess2_used *kexguess2, int *goodguess)
 {
 
-	unsigned char * algolist = NULL;
-	const unsigned char *remotenames[MAX_PROPOSED_ALGO], *localnames[MAX_PROPOSED_ALGO];
+	char * algolist = NULL;
+	const char *remotenames[MAX_PROPOSED_ALGO], *localnames[MAX_PROPOSED_ALGO];
 	unsigned int len;
 	unsigned int remotecount, localcount, clicount, servcount, i, j;
 	algo_type * ret = NULL;
-	const unsigned char **clinames, **servnames;
+	const char **clinames, **servnames;
 
 	if (goodguess) {
 		*goodguess = 0;
@@ -491,7 +491,7 @@ algolist_string(algo_type algos[])
 	buf_setpos(b, b->len);
 	buf_putbyte(b, '\0');
 	buf_setpos(b, 4);
-	ret_list = m_strdup(buf_getptr(b, b->len - b->pos));
+	ret_list = m_strdup((const char *) buf_getptr(b, b->len - b->pos));
 	buf_free(b);
 	return ret_list;
 }
diff --git a/common-channel.c b/common-channel.c
index 5f4051e..abe5941 100644
--- a/common-channel.c
+++ b/common-channel.c
@@ -38,7 +38,7 @@
 #include "netio.h"
 
 static void send_msg_channel_open_failure(unsigned int remotechan, int reason,
-		const unsigned char *text, const unsigned char *lang);
+		const char *text, const char *lang);
 static void send_msg_channel_open_confirmation(struct Channel* channel,
 		unsigned int recvwindow, 
 		unsigned int recvmaxpacket);
@@ -921,7 +921,7 @@ static void send_msg_channel_window_adjust(struct Channel* channel,
 /* Handle a new channel request, performing any channel-type-specific setup */
 void recv_msg_channel_open() {
 
-	unsigned char *type;
+	char *type;
 	unsigned int typelen;
 	unsigned int remotechan, transwindow, transmaxpacket;
 	struct Channel *channel;
@@ -1039,7 +1039,7 @@ void send_msg_channel_success(struct Channel *channel) {
 /* Send a channel open failure message, with a corresponding reason
  * code (usually resource shortage or unknown chan type) */
 static void send_msg_channel_open_failure(unsigned int remotechan, 
-		int reason, const unsigned char *text, const unsigned char *lang) {
+		int reason, const char *text, const char *lang) {
 
 	TRACE(("enter send_msg_channel_open_failure"))
 	CHECKCLEARTOWRITE();
@@ -1047,8 +1047,8 @@ static void send_msg_channel_open_failure(unsigned int remotechan,
 	buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN_FAILURE);
 	buf_putint(ses.writepayload, remotechan);
 	buf_putint(ses.writepayload, reason);
-	buf_putstring(ses.writepayload, text, strlen((char*)text));
-	buf_putstring(ses.writepayload, lang, strlen((char*)lang));
+	buf_putstring(ses.writepayload, text, strlen(text));
+	buf_putstring(ses.writepayload, lang, strlen(lang));
 
 	encrypt_packet();
 	TRACE(("leave send_msg_channel_open_failure"))
@@ -1244,7 +1244,7 @@ struct Channel* get_any_ready_channel() {
 }
 
 void start_send_channel_request(struct Channel *channel, 
-		unsigned char *type) {
+		char *type) {
 
 	CHECKCLEARTOWRITE();
 	buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_REQUEST);
diff --git a/common-kex.c b/common-kex.c
index 0e477da..84b6efd 100644
--- a/common-kex.c
+++ b/common-kex.c
@@ -525,18 +525,17 @@ void recv_msg_kexinit() {
 		read_kex_algos();
 
 		/* V_C, the client's version string (CR and NL excluded) */
-	    buf_putstring(ses.kexhashbuf,
-			(unsigned char*)LOCAL_IDENT, local_ident_len);
+	    buf_putstring(ses.kexhashbuf, LOCAL_IDENT, local_ident_len);
 		/* V_S, the server's version string (CR and NL excluded) */
 	    buf_putstring(ses.kexhashbuf, ses.remoteident, remote_ident_len);
 
 		/* I_C, the payload of the client's SSH_MSG_KEXINIT */
 	    buf_putstring(ses.kexhashbuf,
-			ses.transkexinit->data, ses.transkexinit->len);
+			(const char*)ses.transkexinit->data, ses.transkexinit->len);
 		/* I_S, the payload of the server's SSH_MSG_KEXINIT */
 	    buf_setpos(ses.payload, ses.payload_beginning);
 	    buf_putstring(ses.kexhashbuf, 
-	    	buf_getptr(ses.payload, ses.payload->len-ses.payload->pos),
+	    	(const char*)buf_getptr(ses.payload, ses.payload->len-ses.payload->pos),
 	    	ses.payload->len-ses.payload->pos);
 		ses.requirenext = SSH_MSG_KEXDH_REPLY;
 	} else {
@@ -547,18 +546,17 @@ void recv_msg_kexinit() {
 		/* V_C, the client's version string (CR and NL excluded) */
 	    buf_putstring(ses.kexhashbuf, ses.remoteident, remote_ident_len);
 		/* V_S, the server's version string (CR and NL excluded) */
-	    buf_putstring(ses.kexhashbuf, 
-				(unsigned char*)LOCAL_IDENT, local_ident_len);
+	    buf_putstring(ses.kexhashbuf, LOCAL_IDENT, local_ident_len);
 
 		/* I_C, the payload of the client's SSH_MSG_KEXINIT */
 	    buf_setpos(ses.payload, ses.payload_beginning);
 	    buf_putstring(ses.kexhashbuf, 
-	    	buf_getptr(ses.payload, ses.payload->len-ses.payload->pos),
+	    	(const char*)buf_getptr(ses.payload, ses.payload->len-ses.payload->pos),
 	    	ses.payload->len-ses.payload->pos);
 
 		/* I_S, the payload of the server's SSH_MSG_KEXINIT */
 	    buf_putstring(ses.kexhashbuf,
-			ses.transkexinit->data, ses.transkexinit->len);
+			(const char*)ses.transkexinit->data, ses.transkexinit->len);
 
 		ses.requirenext = SSH_MSG_KEXDH_INIT;
 	}
@@ -783,9 +781,9 @@ void kexcurve25519_comb_key(struct kex_curve25519_param *param, buffer *buf_pub_
 	/* K_S, the host key */
 	buf_put_pub_key(ses.kexhashbuf, hostkey, ses.newkeys->algo_hostkey);
 	/* Q_C, client's ephemeral public key octet string */
-	buf_putstring(ses.kexhashbuf, Q_C, CURVE25519_LEN);
+	buf_putstring(ses.kexhashbuf, (const char*)Q_C, CURVE25519_LEN);
 	/* Q_S, server's ephemeral public key octet string */
-	buf_putstring(ses.kexhashbuf, Q_S, CURVE25519_LEN);
+	buf_putstring(ses.kexhashbuf, (const char*)Q_S, CURVE25519_LEN);
 	/* K, the shared secret */
 	buf_putmpint(ses.kexhashbuf, ses.dh_K);
 
diff --git a/common-session.c b/common-session.c
index e12584c..8ec7516 100644
--- a/common-session.c
+++ b/common-session.c
@@ -327,7 +327,7 @@ void session_cleanup() {
 
 void send_session_identification() {
 	buffer *writebuf = buf_new(strlen(LOCAL_IDENT "\r\n") + 1);
-	buf_putbytes(writebuf, LOCAL_IDENT "\r\n", strlen(LOCAL_IDENT "\r\n"));
+	buf_putbytes(writebuf, (const unsigned char *) LOCAL_IDENT "\r\n", strlen(LOCAL_IDENT "\r\n"));
 	writebuf_enqueue(writebuf, 0);
 }
 
diff --git a/dss.c b/dss.c
index d4c4407..b771ec0 100644
--- a/dss.c
+++ b/dss.c
@@ -165,7 +165,7 @@ int buf_dss_verify(buffer* buf, dropbear_dss_key *key, buffer *data_buf) {
 	DEF_MP_INT(val3);
 	DEF_MP_INT(val4);
 	char * string = NULL;
-	int stringlen;
+	unsigned int stringlen;
 
 	TRACE(("enter buf_dss_verify"))
 	dropbear_assert(key != NULL);
@@ -186,7 +186,7 @@ int buf_dss_verify(buffer* buf, dropbear_dss_key *key, buffer *data_buf) {
 	/* create the signature - s' and r' are the received signatures in buf */
 	/* w = (s')-1 mod q */
 	/* let val1 = s' */
-	bytes_to_mp(&val1, &string[SHA1_HASH_SIZE], SHA1_HASH_SIZE);
+	bytes_to_mp(&val1, (const unsigned char*) &string[SHA1_HASH_SIZE], SHA1_HASH_SIZE);
 
 	if (mp_cmp(&val1, key->q) != MP_LT) {
 		TRACE(("verify failed, s' >= q"))
@@ -208,7 +208,7 @@ int buf_dss_verify(buffer* buf, dropbear_dss_key *key, buffer *data_buf) {
 
 	/* u2 = ((r')w) mod q */
 	/* let val1 = r' */
-	bytes_to_mp(&val1, &string[0], SHA1_HASH_SIZE);
+	bytes_to_mp(&val1, (const unsigned char*) &string[0], SHA1_HASH_SIZE);
 	if (mp_cmp(&val1, key->q) != MP_LT) {
 		TRACE(("verify failed, r' >= q"))
 		goto out;
diff --git a/ecdsa.c b/ecdsa.c
index 4fee796..5568131 100644
--- a/ecdsa.c
+++ b/ecdsa.c
@@ -83,9 +83,9 @@ ecc_key *buf_get_ecdsa_pub_key(buffer* buf) {
 	ecc_key *new_key = NULL;
 
 	/* string   "ecdsa-sha2-[identifier]" */
-	key_ident = buf_getstring(buf, &key_ident_len);
+	key_ident = (unsigned char*)buf_getstring(buf, &key_ident_len);
 	/* string   "[identifier]" */
-	identifier = buf_getstring(buf, &identifier_len);
+	identifier = (unsigned char*)buf_getstring(buf, &identifier_len);
 
 	if (key_ident_len != identifier_len + strlen("ecdsa-sha2-")) {
 		TRACE(("Bad identifier lengths"))
@@ -140,10 +140,10 @@ ecc_key *buf_get_ecdsa_priv_key(buffer *buf) {
 
 void buf_put_ecdsa_pub_key(buffer *buf, ecc_key *key) {
 	struct dropbear_ecc_curve *curve = NULL;
-	unsigned char key_ident[30];
+	char key_ident[30];
 
 	curve = curve_for_dp(key->dp);
-	snprintf((char*)key_ident, sizeof(key_ident), "ecdsa-sha2-%s", curve->name);
+	snprintf(key_ident, sizeof(key_ident), "ecdsa-sha2-%s", curve->name);
 	buf_putstring(buf, key_ident, strlen(key_ident));
 	buf_putstring(buf, curve->name, strlen(curve->name));
 	buf_put_ecc_raw_pubkey_string(buf, key);
@@ -161,7 +161,7 @@ void buf_put_ecdsa_sign(buffer *buf, ecc_key *key, buffer *data_buf) {
 	hash_state hs;
 	unsigned char hash[64];
 	void *e = NULL, *p = NULL, *s = NULL, *r;
-	unsigned char key_ident[30];
+	char key_ident[30];
 	buffer *sigbuf = NULL;
 
 	TRACE(("buf_put_ecdsa_sign"))
@@ -222,7 +222,7 @@ void buf_put_ecdsa_sign(buffer *buf, ecc_key *key, buffer *data_buf) {
 		}
 	}
 
-	snprintf((char*)key_ident, sizeof(key_ident), "ecdsa-sha2-%s", curve->name);
+	snprintf(key_ident, sizeof(key_ident), "ecdsa-sha2-%s", curve->name);
 	buf_putstring(buf, key_ident, strlen(key_ident));
 	/* enough for nistp521 */
 	sigbuf = buf_new(200);
diff --git a/keyimport.c b/keyimport.c
index 8a0d525..362d775 100644
--- a/keyimport.c
+++ b/keyimport.c
@@ -649,9 +649,9 @@ static sign_key *openssh_read(const char *filename, char * UNUSED(passphrase))
 				modptr = (char *)p;
 				modlen = len;
 			} else if (i >= 2 && i <= 5) {
-				buf_putstring(blobbuf, p, len);
+				buf_putstring(blobbuf, (const char*)p, len);
 				if (i == 2) {
-					buf_putstring(blobbuf, modptr, modlen);
+					buf_putstring(blobbuf, (const char*)modptr, modlen);
 				}
 			}
 		} else if (key->type == OSSH_DSA) {
@@ -659,7 +659,7 @@ static sign_key *openssh_read(const char *filename, char * UNUSED(passphrase))
 			 * OpenSSH key order is p, q, g, y, x,
 			 * we want the same.
 			 */
-			buf_putstring(blobbuf, p, len);
+			buf_putstring(blobbuf, (const char*)p, len);
 		}
 
 		/* Skip past the number. */
diff --git a/netio.c b/netio.c
index 7e8338c..74eea7b 100644
--- a/netio.c
+++ b/netio.c
@@ -99,7 +99,7 @@ static void connect_try_next(struct dropbear_progress_connection *c) {
 			message.msg_name = r->ai_addr;
 			message.msg_namelen = r->ai_addrlen;
 			/* 6 is arbitrary, enough to hold initial packets */
-			int iovlen = 6; /* Linux msg_iovlen is a size_t */
+			unsigned int iovlen = 6; /* Linux msg_iovlen is a size_t */
 			struct iovec iov[6];
 			packet_queue_to_iovec(c->writequeue, iov, &iovlen);
 			message.msg_iov = iov;
diff --git a/signkey.c b/signkey.c
index 10a63f2..ac5d887 100644
--- a/signkey.c
+++ b/signkey.c
@@ -138,7 +138,7 @@ signkey_key_ptr(sign_key *key, enum signkey_type type) {
  * on return is set to the type read (useful when type = _ANY) */
 int buf_get_pub_key(buffer *buf, sign_key *key, enum signkey_type *type) {
 
-	unsigned char* ident;
+	char *ident;
 	unsigned int len;
 	enum signkey_type keytype;
 	int ret = DROPBEAR_FAILURE;
@@ -209,7 +209,7 @@ int buf_get_pub_key(buffer *buf, sign_key *key, enum signkey_type *type) {
  * on return is set to the type read (useful when type = _ANY) */
 int buf_get_priv_key(buffer *buf, sign_key *key, enum signkey_type *type) {
 
-	unsigned char* ident;
+	char *ident;
 	unsigned int len;
 	enum signkey_type keytype;
 	int ret = DROPBEAR_FAILURE;
@@ -515,7 +515,7 @@ void buf_put_sign(buffer* buf, sign_key *key, enum signkey_type type,
  * signature blob */
 int buf_verify(buffer * buf, sign_key *key, buffer *data_buf) {
 	
-	unsigned char * type_name = NULL;
+	char *type_name = NULL;
 	unsigned int type_name_len = 0;
 	enum signkey_type type;
 
diff --git a/svr-auth.c b/svr-auth.c
index 89760ef..87330ac 100644
--- a/svr-auth.c
+++ b/svr-auth.c
@@ -36,7 +36,7 @@
 #include "dbrandom.h"
 
 static void authclear();
-static int checkusername(unsigned char *username, unsigned int userlen);
+static int checkusername(char *username, unsigned int userlen);
 
 /* initialise the first time for a session, resetting all parameters */
 void svr_authinitialise() {
@@ -100,7 +100,7 @@ void send_msg_userauth_banner(buffer *banner) {
  * checking, and handle success or failure */
 void recv_msg_userauth_request() {
 
-	unsigned char *username = NULL, *servicename = NULL, *methodname = NULL;
+	char *username = NULL, *servicename = NULL, *methodname = NULL;
 	unsigned int userlen, servicelen, methodlen;
 	int valid_user = 0;
 
@@ -227,7 +227,7 @@ out:
 
 /* Check that the username exists and isn't disallowed (root), and has a valid shell.
  * returns DROPBEAR_SUCCESS on valid username, DROPBEAR_FAILURE on failure */
-static int checkusername(unsigned char *username, unsigned int userlen) {
+static int checkusername(char *username, unsigned int userlen) {
 
 	char* listshell = NULL;
 	char* usershell = NULL;
@@ -333,14 +333,14 @@ void send_msg_userauth_failure(int partial, int incrfail) {
 	typebuf = buf_new(30); /* long enough for PUBKEY and PASSWORD */
 
 	if (ses.authstate.authtypes & AUTH_TYPE_PUBKEY) {
-		buf_putbytes(typebuf, AUTH_METHOD_PUBKEY, AUTH_METHOD_PUBKEY_LEN);
+		buf_putbytes(typebuf, (const unsigned char *)AUTH_METHOD_PUBKEY, AUTH_METHOD_PUBKEY_LEN);
 		if (ses.authstate.authtypes & AUTH_TYPE_PASSWORD) {
 			buf_putbyte(typebuf, ',');
 		}
 	}
 	
 	if (ses.authstate.authtypes & AUTH_TYPE_PASSWORD) {
-		buf_putbytes(typebuf, AUTH_METHOD_PASSWORD, AUTH_METHOD_PASSWORD_LEN);
+		buf_putbytes(typebuf, (const unsigned char *)AUTH_METHOD_PASSWORD, AUTH_METHOD_PASSWORD_LEN);
 	}
 
 	buf_putbufstring(ses.writepayload, typebuf);
diff --git a/svr-authpam.c b/svr-authpam.c
index 0b1d69f..101017c 100644
--- a/svr-authpam.c
+++ b/svr-authpam.c
@@ -188,7 +188,7 @@ void svr_auth_pam() {
 
 	pam_handle_t* pamHandlep = NULL;
 
-	unsigned char * password = NULL;
+	char * password = NULL;
 	unsigned int passwordlen;
 
 	int rc = PAM_SUCCESS;
diff --git a/svr-authpasswd.c b/svr-authpasswd.c
index 0153a53..9852ac6 100644
--- a/svr-authpasswd.c
+++ b/svr-authpasswd.c
@@ -52,7 +52,7 @@ void svr_auth_password() {
 	
 	char * passwdcrypt = NULL; /* the crypt from /etc/passwd or /etc/shadow */
 	char * testcrypt = NULL; /* crypt generated from the user's password sent */
-	unsigned char * password;
+	char * password;
 	unsigned int passwordlen;
 
 	unsigned int changepw;
@@ -75,7 +75,7 @@ void svr_auth_password() {
 	password = buf_getstring(ses.payload, &passwordlen);
 
 	/* the first bytes of passwdcrypt are the salt */
-	testcrypt = crypt((char*)password, passwdcrypt);
+	testcrypt = crypt(password, passwdcrypt);
 	m_burn(password, passwordlen);
 	m_free(password);
 
diff --git a/svr-authpubkey.c b/svr-authpubkey.c
index e8af319..89d77ed 100644
--- a/svr-authpubkey.c
+++ b/svr-authpubkey.c
@@ -70,10 +70,10 @@
 #define MIN_AUTHKEYS_LINE 10 /* "ssh-rsa AB" - short but doesn't matter */
 #define MAX_AUTHKEYS_LINE 4200 /* max length of a line in authkeys */
 
-static int checkpubkey(unsigned char* algo, unsigned int algolen,
+static int checkpubkey(char* algo, unsigned int algolen,
 		unsigned char* keyblob, unsigned int keybloblen);
 static int checkpubkeyperms();
-static void send_msg_userauth_pk_ok(unsigned char* algo, unsigned int algolen,
+static void send_msg_userauth_pk_ok(char* algo, unsigned int algolen,
 		unsigned char* keyblob, unsigned int keybloblen);
 static int checkfileperm(char * filename);
 
@@ -82,7 +82,7 @@ static int checkfileperm(char * filename);
 void svr_auth_pubkey() {
 
 	unsigned char testkey; /* whether we're just checking if a key is usable */
-	unsigned char* algo = NULL; /* pubkey algo */
+	char* algo = NULL; /* pubkey algo */
 	unsigned int algolen;
 	unsigned char* keyblob = NULL;
 	unsigned int keybloblen;
@@ -173,7 +173,7 @@ out:
 /* Reply that the key is valid for auth, this is sent when the user sends
  * a straight copy of their pubkey to test, to avoid having to perform
  * expensive signing operations with a worthless key */
-static void send_msg_userauth_pk_ok(unsigned char* algo, unsigned int algolen,
+static void send_msg_userauth_pk_ok(char* algo, unsigned int algolen,
 		unsigned char* keyblob, unsigned int keybloblen) {
 
 	TRACE(("enter send_msg_userauth_pk_ok"))
@@ -181,7 +181,7 @@ static void send_msg_userauth_pk_ok(unsigned char* algo, unsigned int algolen,
 
 	buf_putbyte(ses.writepayload, SSH_MSG_USERAUTH_PK_OK);
 	buf_putstring(ses.writepayload, algo, algolen);
-	buf_putstring(ses.writepayload, keyblob, keybloblen);
+	buf_putstring(ses.writepayload, (const char*)keyblob, keybloblen);
 
 	encrypt_packet();
 	TRACE(("leave send_msg_userauth_pk_ok"))
@@ -191,7 +191,7 @@ static void send_msg_userauth_pk_ok(unsigned char* algo, unsigned int algolen,
 /* Checks whether a specified publickey (and associated algorithm) is an
  * acceptable key for authentication */
 /* Returns DROPBEAR_SUCCESS if key is ok for auth, DROPBEAR_FAILURE otherwise */
-static int checkpubkey(unsigned char* algo, unsigned int algolen,
+static int checkpubkey(char* algo, unsigned int algolen,
 		unsigned char* keyblob, unsigned int keybloblen) {
 
 	FILE * authfile = NULL;
@@ -260,9 +260,9 @@ static int checkpubkey(unsigned char* algo, unsigned int algolen,
 		/* check the key type - will fail if there are options */
 		TRACE(("a line!"))
 
-		if (strncmp(buf_getptr(line, algolen), algo, algolen) != 0) {
+		if (strncmp((const char *) buf_getptr(line, algolen), algo, algolen) != 0) {
 			int is_comment = 0;
-			char *options_start = NULL;
+			unsigned char *options_start = NULL;
 			int options_len = 0;
 			int escape, quoted;
 			
@@ -308,7 +308,7 @@ static int checkpubkey(unsigned char* algo, unsigned int algolen,
 			if (line->pos + algolen+3 > line->len) {
 				continue;
 			}
-			if (strncmp(buf_getptr(line, algolen), algo, algolen) != 0) { 
+			if (strncmp((const char *) buf_getptr(line, algolen), algo, algolen) != 0) {
 				continue;
 			}
 		}
@@ -330,7 +330,7 @@ static int checkpubkey(unsigned char* algo, unsigned int algolen,
 
 		TRACE(("checkpubkey: line pos = %d len = %d", line->pos, line->len))
 
-		ret = cmp_base64_key(keyblob, keybloblen, algo, algolen, line, NULL);
+		ret = cmp_base64_key(keyblob, keybloblen, (const unsigned char *) algo, algolen, line, NULL);
 
 		if (ret == DROPBEAR_SUCCESS && options_buf) {
 			ret = svr_add_pubkey_options(options_buf, line_num, filename);
diff --git a/svr-chansession.c b/svr-chansession.c
index 5bed8fc..e44299e 100644
--- a/svr-chansession.c
+++ b/svr-chansession.c
@@ -343,7 +343,7 @@ static void closechansess(struct Channel *channel) {
  * or x11/authagent forwarding. These are passed to appropriate handlers */
 static void chansessionrequest(struct Channel *channel) {
 
-	unsigned char * type = NULL;
+	char * type = NULL;
 	unsigned int typelen;
 	unsigned char wantreply;
 	int ret = 1;
@@ -406,7 +406,7 @@ out:
 static int sessionsignal(struct ChanSess *chansess) {
 
 	int sig = 0;
-	unsigned char* signame = NULL;
+	char* signame = NULL;
 	int i;
 
 	if (chansess->pid == 0) {
@@ -557,7 +557,7 @@ static void get_termmodes(struct ChanSess *chansess) {
 static int sessionpty(struct ChanSess * chansess) {
 
 	unsigned int termlen;
-	unsigned char namebuf[65];
+	char namebuf[65];
 	struct passwd * pw = NULL;
 
 	TRACE(("enter sessionpty"))
@@ -583,7 +583,7 @@ static int sessionpty(struct ChanSess * chansess) {
 		return DROPBEAR_FAILURE;
 	}
 	
-	chansess->tty = (char*)m_strdup(namebuf);
+	chansess->tty = m_strdup(namebuf);
 	if (!chansess->tty) {
 		dropbear_exit("Out of memory"); /* TODO disconnect */
 	}
@@ -603,6 +603,7 @@ static int sessionpty(struct ChanSess * chansess) {
 	return DROPBEAR_SUCCESS;
 }
 
+#ifndef USE_VFORK
 static void make_connection_string(struct ChanSess *chansess) {
 	char *local_ip, *local_port, *remote_ip, *remote_port;
 	size_t len;
@@ -624,6 +625,7 @@ static void make_connection_string(struct ChanSess *chansess) {
 	m_free(remote_ip);
 	m_free(remote_port);
 }
+#endif
 
 /* Handle a command request from the client. This is used for both shell
  * and command-execution requests, and passes the command to
diff --git a/svr-kex.c b/svr-kex.c
index 6cc5433..96f4508 100644
--- a/svr-kex.c
+++ b/svr-kex.c
@@ -247,7 +247,7 @@ static void send_msg_kexdh_reply(mp_int *dh_e, buffer *ecdh_qs) {
 			{
 			struct kex_curve25519_param *param = gen_kexcurve25519_param();
 			kexcurve25519_comb_key(param, ecdh_qs, svr_opts.hostkey);
-			buf_putstring(ses.writepayload, param->pub, CURVE25519_LEN);
+			buf_putstring(ses.writepayload, (const char*)param->pub, CURVE25519_LEN);
 			free_kexcurve25519_param(param);
 			}
 #endif
diff --git a/svr-service.c b/svr-service.c
index 9c5e580..1f72ea5 100644
--- a/svr-service.c
+++ b/svr-service.c
@@ -30,13 +30,13 @@
 #include "ssh.h"
 #include "auth.h"
 
-static void send_msg_service_accept(unsigned char *name, int len);
+static void send_msg_service_accept(char *name, int len);
 
 /* processes a SSH_MSG_SERVICE_REQUEST, returning 0 if finished,
  * 1 if not */
 void recv_msg_service_request() {
 
-	unsigned char * name;
+	char * name;
 	unsigned int len;
 
 	TRACE(("enter recv_msg_service_request"))
@@ -73,7 +73,7 @@ void recv_msg_service_request() {
 
 }
 
-static void send_msg_service_accept(unsigned char *name, int len) {
+static void send_msg_service_accept(char *name, int len) {
 
 	TRACE(("accepting service %s", name))
 
diff --git a/svr-tcpfwd.c b/svr-tcpfwd.c
index b3928bc..d2f1427 100644
--- a/svr-tcpfwd.c
+++ b/svr-tcpfwd.c
@@ -65,7 +65,7 @@ static const struct ChanType svr_chan_tcpremote = {
  * similar to the request-switching in chansession.c */
 void recv_msg_global_request_remotetcp() {
 
-	unsigned char* reqname = NULL;
+	char* reqname = NULL;
 	unsigned int namelen;
 	unsigned int wantreply = 0;
 	int ret = DROPBEAR_FAILURE;
@@ -120,7 +120,7 @@ static int matchtcp(void* typedata1, void* typedata2) {
 static int svr_cancelremotetcp() {
 
 	int ret = DROPBEAR_FAILURE;
-	unsigned char * bindaddr = NULL;
+	char * bindaddr = NULL;
 	unsigned int addrlen;
 	unsigned int port;
 	struct Listener * listener = NULL;
@@ -155,7 +155,7 @@ out:
 static int svr_remotetcpreq() {
 
 	int ret = DROPBEAR_FAILURE;
-	unsigned char * request_addr = NULL;
+	char * request_addr = NULL;
 	unsigned int addrlen;
 	struct TCPListener *tcpinfo = NULL;
 	unsigned int port;
@@ -232,12 +232,12 @@ const struct ChanType svr_chan_tcpdirect = {
  * address */
 static int newtcpdirect(struct Channel * channel) {
 
-	unsigned char* desthost = NULL;
+	char* desthost = NULL;
 	unsigned int destport;
-	unsigned char* orighost = NULL;
+	char* orighost = NULL;
 	unsigned int origport;
 	char portstring[NI_MAXSERV];
-	int len;
+	unsigned int len;
 	int err = SSH_OPEN_ADMINISTRATIVELY_PROHIBITED;
 
 	TRACE(("newtcpdirect channel %d", channel->index))
diff --git a/svr-x11fwd.c b/svr-x11fwd.c
index 6400c06..144ec0b 100644
--- a/svr-x11fwd.c
+++ b/svr-x11fwd.c
@@ -107,7 +107,7 @@ static void x11accept(struct Listener* listener, int sock) {
 
 	int fd;
 	struct sockaddr_in addr;
-	int len;
+	socklen_t len;
 	int ret;
 	struct ChanSess * chansess = (struct ChanSess *)(listener->typedata);