#!/bin/sh

# For a list of supported curves, use "apps/openssl ecparam -list_curves".

# Path to the openssl distribution
OPENSSL_DIR=../..
# Path to the openssl program
OPENSSL_CMD=$OPENSSL_DIR/apps/openssl
# Option to find configuration file
OPENSSL_CNF="-config $OPENSSL_DIR/apps/openssl.cnf"
# Directory where certificates are stored
CERTS_DIR=./Certs
# Directory where private key files are stored
KEYS_DIR=$CERTS_DIR
# Directory where combo files (containing a certificate and corresponding
# private key together) are stored
COMBO_DIR=$CERTS_DIR
# cat command
CAT=/bin/cat
# rm command
RM=/bin/rm
# The certificate will expire these many days after the issue date.
DAYS=1500
TEST_CA_CURVE=secp160r1
TEST_CA_FILE=secp160r1TestCA
TEST_CA_DN="/C=US/ST=CA/L=Mountain View/O=Sun Microsystems, Inc./OU=Sun Microsystems Laboratories/CN=Test CA (Elliptic curve secp160r1)"

TEST_SERVER_CURVE=secp160r2
TEST_SERVER_FILE=secp160r2TestServer
TEST_SERVER_DN="/C=US/ST=CA/L=Mountain View/O=Sun Microsystems, Inc./OU=Sun Microsystems Laboratories/CN=Test Server (Elliptic curve secp160r2)"

TEST_CLIENT_CURVE=secp160r2
TEST_CLIENT_FILE=secp160r2TestClient
TEST_CLIENT_DN="/C=US/ST=CA/L=Mountain View/O=Sun Microsystems, Inc./OU=Sun Microsystems Laboratories/CN=Test Client (Elliptic curve secp160r2)"

# Generating an EC certificate involves the following main steps
# 1. Generating curve parameters (if needed)
# 2. Generating a certificate request
# 3. Signing the certificate request 
# 4. [Optional] One can combine the cert and private key into a single
#    file and also delete the certificate request

echo "Generating self-signed CA certificate (on curve $TEST_CA_CURVE)"
echo "==============================================================="
$OPENSSL_CMD ecparam -name $TEST_CA_CURVE -out $TEST_CA_CURVE.pem

# Generate a new certificate request in $TEST_CA_FILE.req.pem. A 
# new ecdsa (actually ECC) key pair is generated on the parameters in
# $TEST_CA_CURVE.pem and the private key is saved in $TEST_CA_FILE.key.pem
# WARNING: By using the -nodes option, we force the private key to be 
# stored in the clear (rather than encrypted with a password).
$OPENSSL_CMD req $OPENSSL_CNF -nodes -subj "$TEST_CA_DN" \
    -keyout $KEYS_DIR/$TEST_CA_FILE.key.pem \
    -newkey ecdsa:$TEST_CA_CURVE.pem -new \
    -out $CERTS_DIR/$TEST_CA_FILE.req.pem

# Sign the certificate request in $TEST_CA_FILE.req.pem using the
# private key in $TEST_CA_FILE.key.pem and include the CA extension.
# Make the certificate valid for 1500 days from the time of signing.
# The certificate is written into $TEST_CA_FILE.cert.pem
$OPENSSL_CMD x509 -req -days $DAYS \
    -in $CERTS_DIR/$TEST_CA_FILE.req.pem \
    -extfile $OPENSSL_DIR/apps/openssl.cnf \
    -extensions v3_ca \
    -signkey $KEYS_DIR/$TEST_CA_FILE.key.pem \
    -out $CERTS_DIR/$TEST_CA_FILE.cert.pem

# Display the certificate
$OPENSSL_CMD x509 -in $CERTS_DIR/$TEST_CA_FILE.cert.pem -text

# Place the certificate and key in a common file
$OPENSSL_CMD x509 -in $CERTS_DIR/$TEST_CA_FILE.cert.pem -issuer -subject \
	 > $COMBO_DIR/$TEST_CA_FILE.pem
$CAT $KEYS_DIR/$TEST_CA_FILE.key.pem >> $COMBO_DIR/$TEST_CA_FILE.pem

# Remove the cert request file (no longer needed)
$RM $CERTS_DIR/$TEST_CA_FILE.req.pem

echo "GENERATING A TEST SERVER CERTIFICATE (on elliptic curve $TEST_SERVER_CURVE)"
echo "=========================================================================="
# Generate parameters for curve $TEST_SERVER_CURVE, if needed
$OPENSSL_CMD ecparam -name $TEST_SERVER_CURVE -out $TEST_SERVER_CURVE.pem

# Generate a new certificate request in $TEST_SERVER_FILE.req.pem. A 
# new ecdsa (actually ECC) key pair is generated on the parameters in
# $TEST_SERVER_CURVE.pem and the private key is saved in 
# $TEST_SERVER_FILE.key.pem
# WARNING: By using the -nodes option, we force the private key to be 
# stored in the clear (rather than encrypted with a password).
$OPENSSL_CMD req $OPENSSL_CNF -nodes -subj "$TEST_SERVER_DN" \
    -keyout $KEYS_DIR/$TEST_SERVER_FILE.key.pem \
    -newkey ecdsa:$TEST_SERVER_CURVE.pem -new \
    -out $CERTS_DIR/$TEST_SERVER_FILE.req.pem

# Sign the certificate request in $TEST_SERVER_FILE.req.pem using the
# CA certificate in $TEST_CA_FILE.cert.pem and the CA private key in
# $TEST_CA_FILE.key.pem. Since we do not have an existing serial number
# file for this CA, create one. Make the certificate valid for $DAYS days
# from the time of signing. The certificate is written into 
# $TEST_SERVER_FILE.cert.pem
$OPENSSL_CMD x509 -req -days $DAYS \
    -in $CERTS_DIR/$TEST_SERVER_FILE.req.pem \
    -CA $CERTS_DIR/$TEST_CA_FILE.cert.pem \
    -CAkey $KEYS_DIR/$TEST_CA_FILE.key.pem \
    -out $CERTS_DIR/$TEST_SERVER_FILE.cert.pem -CAcreateserial

# Display the certificate 
$OPENSSL_CMD x509 -in $CERTS_DIR/$TEST_SERVER_FILE.cert.pem -text

# Place the certificate and key in a common file
$OPENSSL_CMD x509 -in $CERTS_DIR/$TEST_SERVER_FILE.cert.pem -issuer -subject \
	 > $COMBO_DIR/$TEST_SERVER_FILE.pem
$CAT $KEYS_DIR/$TEST_SERVER_FILE.key.pem >> $COMBO_DIR/$TEST_SERVER_FILE.pem

# Remove the cert request file (no longer needed)
$RM $CERTS_DIR/$TEST_SERVER_FILE.req.pem

echo "GENERATING A TEST CLIENT CERTIFICATE (on elliptic curve $TEST_CLIENT_CURVE)"
echo "=========================================================================="
# Generate parameters for curve $TEST_CLIENT_CURVE, if needed
$OPENSSL_CMD ecparam -name $TEST_CLIENT_CURVE -out $TEST_CLIENT_CURVE.pem

# Generate a new certificate request in $TEST_CLIENT_FILE.req.pem. A 
# new ecdsa (actually ECC) key pair is generated on the parameters in
# $TEST_CLIENT_CURVE.pem and the private key is saved in 
# $TEST_CLIENT_FILE.key.pem
# WARNING: By using the -nodes option, we force the private key to be 
# stored in the clear (rather than encrypted with a password).
$OPENSSL_CMD req $OPENSSL_CNF -nodes -subj "$TEST_CLIENT_DN" \
	     -keyout $KEYS_DIR/$TEST_CLIENT_FILE.key.pem \
	     -newkey ecdsa:$TEST_CLIENT_CURVE.pem -new \
	     -out $CERTS_DIR/$TEST_CLIENT_FILE.req.pem

# Sign the certificate request in $TEST_CLIENT_FILE.req.pem using the
# CA certificate in $TEST_CA_FILE.cert.pem and the CA private key in
# $TEST_CA_FILE.key.pem. Since we do not have an existing serial number
# file for this CA, create one. Make the certificate valid for $DAYS days
# from the time of signing. The certificate is written into 
# $TEST_CLIENT_FILE.cert.pem
$OPENSSL_CMD x509 -req -days $DAYS \
    -in $CERTS_DIR/$TEST_CLIENT_FILE.req.pem \
    -CA $CERTS_DIR/$TEST_CA_FILE.cert.pem \
    -CAkey $KEYS_DIR/$TEST_CA_FILE.key.pem \
    -out $CERTS_DIR/$TEST_CLIENT_FILE.cert.pem -CAcreateserial

# Display the certificate 
$OPENSSL_CMD x509 -in $CERTS_DIR/$TEST_CLIENT_FILE.cert.pem -text

# Place the certificate and key in a common file
$OPENSSL_CMD x509 -in $CERTS_DIR/$TEST_CLIENT_FILE.cert.pem -issuer -subject \
	 > $COMBO_DIR/$TEST_CLIENT_FILE.pem
$CAT $KEYS_DIR/$TEST_CLIENT_FILE.key.pem >> $COMBO_DIR/$TEST_CLIENT_FILE.pem

# Remove the cert request file (no longer needed)
$RM $CERTS_DIR/$TEST_CLIENT_FILE.req.pem

############################################################################
#OLD STUFF (ignore this)
#
#These are the commands I used, but you may wish to add -named_curve to the first command per our discussion about parameter encoding in certificates.
#
#apps/openssl ecdsaparam -out nist192.param.pem -NIST_192
#
#apps/openssl ecdsaparam -out nistB163.param.pem -named_curve -NIST_B163
# the nodes option causes output key to be stored unencrypted
#apps/openssl req -nodes -keyout nistB163.priv.pem -newkey ecdsa:nistB163.param.pem -new -out nistB163.req.pem
#apps/openssl x509 -req -in nistB163.req.pem -extfile apps/cert.cnf -extensions v3_ca -signkey nistB163.priv.pem -out nistB163.cert.pem
#
#crypto/x509/x509_ext.c  has X509_EXTENSION *X509_get_ext(X509 *x, int loc)
#crypto/asn1/t_x509.c    has code to print certificates
#crypto/x509v3/v3_prn.c  has code to print extensions X509V3_extensions_print