OCSP example using Certificate Manager

.gitignore

@@ -247,6 +247,9 @@ embedded/tls-sock-threaded
 embedded/tls-threaded
 
 hash/sha256-hash
+
+ocsp/ocsp_nonblock/ocsp_nonblock
+
 sslkeylog.log
 
 tpm/evp_tpm

ocsp/ocsp_nonblock/Makefile

@@ -0,0 +1,36 @@
+# Examples Makefile
+CC       = gcc
+LIB_PATH = /usr/local
+CFLAGS   = -Wall -I$(LIB_PATH)/include
+LIBS     = -L$(LIB_PATH)/lib
+
+# option variables
+DYN_LIB         = -lwolfssl
+STATIC_LIB      = $(LIB_PATH)/lib/libwolfssl.a
+DEBUG_FLAGS     = -g -DDEBUG
+DEBUG_INC_PATHS = -MD
+OPTIMIZE        = -Os
+
+# Options
+#CFLAGS+=$(DEBUG_FLAGS)
+CFLAGS+=$(OPTIMIZE)
+#LIBS+=$(STATIC_LIB)
+LIBS+=$(DYN_LIB)
+
+# build targets
+SRC=$(wildcard *.c)
+TARGETS=$(patsubst %.c, %, $(SRC))
+
+.PHONY: clean all
+
+all: $(TARGETS)
+
+debug: CFLAGS+=$(DEBUG_FLAGS)
+debug: all
+
+# build template
+%: %.c
+	$(CC) -o $@ $< $(CFLAGS) $(LIBS)
+
+clean:
+	rm -f $(TARGETS)

ocsp/ocsp_nonblock/README.md

@@ -0,0 +1,34 @@
+# OCSP Examples
+
+Online Certificate Status Protocol (OCSP) is used for obtaining the revocation status of an X.509 digital certificate.
+
+
+## OCSP non-blocking example
+
+This uses a google.com certificate chain to demonstrate validating revocation status using an OCSP server.
+
+The Google.com certificate defines OCSP in the X509v3 extension "Authority Information Access" section.
+
+Example usage:
+
+```sh
+$ ./configure --enable-ocsp CFLAGS="-DHAVE_IO_TIMEOUT -DWOLFSSL_NONBLOCK_OCSP"
+$ make
+$ sudo make install
+
+% make
+gcc -o ocsp_nonblock ocsp_nonblock.c -Wall -I/usr/local/include -Os -L/usr/local/lib -lwolfssl
+
+% ./ocsp_nonblock
+Loaded Trusted CA dir ca_certs (ret 1)
+Convert Google.com PEM cert to DER (ret 1)
+Verify Google.com cert: 1
+OCSP Lookup:
+	URL: http://ocsp.pki.goog/gts1c3
+	Domain: ocsp.pki.goog
+	Path: /gts1c3
+	Port: 80
+OCSP Response: ret 471, nonblock count 409421
+Check OCSP for Google.com (ret 1)
+Ret = 1: success
+```

ocsp/ocsp_nonblock/ca_certs/GTS_CA_1C3.pem

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+-----END CERTIFICATE-----

ocsp/ocsp_nonblock/ca_certs/GTS_Root_R1.pem

@@ -0,0 +1,31 @@
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+-----END CERTIFICATE-----

ocsp/ocsp_nonblock/google.pem

@@ -0,0 +1,27 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----