Fix null pointer dereference

LICENSE.md

@@ -0,0 +1,14 @@
+Copyright (c) 2016, Kristaps Dzonsons <kristaps@bsd.lv>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
+

Makefile

@@ -1,18 +1,40 @@
-CFLAGS += -g -W -Wall -Wno-deprecated-declarations `curl-config --cflags`
+PREFIX	 = /usr/local
+CFLAGS	+= -g -W -Wall
+OBJS 	 = acctproc.o \
+	   base64.o \
+	   certproc.o \
+	   chngproc.o \
+	   dbg.o \
+	   dnsproc.o \
+	   fileproc.o \
+	   http.o \
+	   jsmn.o \
+	   json.o \
+	   keyproc.o \
+	   main.o \
+	   netproc.o \
+	   revokeproc.o \
+	   rsa.o \
+	   sandbox-pledge.o \
+	   util.o \
+	   util-pledge.o
 
-OBJS = netproc.o main.o keyproc.o acctproc.o dbg.o base64.o util.o chngproc.o json.o certproc.o
+acme-client: $(OBJS)
+	$(CC) -o $@ $(OBJS) -ltls -lssl -lcrypto
 
-letskencrypt: $(OBJS)
-	$(CC) -o $@ $(OBJS) -lssl -lcrypto `curl-config --libs` -ljson-c
+rsa.o acctproc.o keyproc.o: rsa.h
 
-install: letskencrypt
-	mkdir -p $(PREFIX)/bin
-	mkdir -p $(PREFIX)/man/man1
-	install -m 0755 letskencrypt $(PREFIX)/bin
-	install -m 0644 letskencrypt.1 $(PREFIX)/man/man1
+jsmn.o json.o: jsmn.h
+
+http.o netproc.o: http.h
+
+install: acme-client
+	mkdir -p $(DESTDIR)$(PREFIX)/bin
+	mkdir -p $(DESTDIR)$(PREFIX)/man/man1
+	install -m 0755 acme-client $(DESTDIR)$(PREFIX)/bin
+	install -m 0644 acme-client.1 $(DESTDIR)$(PREFIX)/man/man1
 
 $(OBJS): extern.h
 
 clean:
-	rm -f letskencrypt $(OBJS)
-	rm -rf letskencrypt.dSYM
+	rm -f acme-client $(OBJS)

README.md

@@ -0,0 +1,35 @@
+## Synopsis
+
+*acme-client* is yet another
+[ACME](https://letsencrypt.github.io/acme-spec/) client, specifically
+for [Let's Encrypt](https://letsencrypt.org), but one with a strong
+focus on security. 
+
+It was originally named *letskencrypt* until version 0.1.11.
+
+Please see
+[kristaps.bsd.lv/acme-client](https://kristaps.bsd.lv/acme-client) for
+stable releases: this repository is for current development of the
+[OpenBSD](http://www.openbsd.org) version, requiring OpenBSD 5.9 or
+greater.  For the portable version (Mac OS X, Linux, FreeBSD, NetBSD) see
+[acme-client-portable](https://github.com/kristapsdz/acme-client-portable).
+
+**Note**: this is *not* the same as the OpenBSD version of *acme-client*.
+
+This repository mirrors the master CVS repository: any source changes
+will occur in the master and be pushed periodically to GitHub.  If you
+have bug reports or patches, either file them here or e-mail them to me.
+
+**Feature requests will be ignored unless joined by a patch.**  If
+there's something you need, I'm happy to work with you to make it
+happen.  If you really need it, I'm available for contract (contact me
+by e-mail).
+
+## License
+
+Sources use the ISC (like OpenBSD) license.
+See the [LICENSE.md](LICENSE.md) file for details.
+
+The [jsmn.c](jsmn.c) and [jsmn.h](jsmn.h) files use the MIT license.
+See [https://github.com/zserge/jsmn](https://github.com/zserge/jsmn) for
+details.