#!/usr/bin/env bash

# pem.test
# Copyright wolfSSL 2023-2023

tmp_file=./pem_test.$$
tmp_der_file=./pem_test_out_der.$$
tmp_pem_file=./pem_test_out_pem.$$
PEM_EXE=./examples/pem/pem
ASN1_EXE=./examples/asn1/asn1
TEST_CNT=0
TEST_PASS_CNT=0
TEST_SKIP_CNT=0
TEST_FAIL_CNT=0
TEST_FAIL=
TEST_CASES=()
RUN_ALL="YES"
CR=$'\n'
ENC_STRING="encrypt"
DER_TO_PEM_STRING="input is DER and output is PEM"

# Cleanup temporaries created during testing.
do_cleanup() {
    echo
    echo "in cleanup"

    if [ -e "$tmp_der_file" ]; then
        echo -e "removing existing temporary DER output file"
        rm "$tmp_der_file"
    fi
    if [ -e "$tmp_pem_file" ]; then
        echo -e "removing existing temporary PEM output file"
        rm "$tmp_pem_file"
    fi
    if [ -e "$tmp_file" ]; then
        echo -e "removing existing temporary output file"
        rm "$tmp_file"
    fi
}

# Called when a signal is trapped.
do_trap() {
    echo
    echo "got trap"
    do_cleanup
    exit 1
}

# Trap keyboard interrupt and termination signal.
trap do_trap INT TERM

# Check the usage text for a string to determine feature support.
#
# @param [in] $1  String to search for,
# @return  1 when string is found.
# @return  0 otherwise.
check_usage_string() {
    $PEM_EXE -? | grep "$1" >$tmp_file 2>&1
    if [ "$?" = "0" ]; then
        return 1
    fi
    return 0
}

# Check whether the test case is to be run.
# When command line parameters given - only run those.
#
# @return  1 when test case is to be run.
# @return  0 otherwise.
check_run() {
    # When RUN_ALL set them all test cases are run.
    if [ "$RUN_ALL" != "" ]; then
       return 1
    else
       # Check if test case number in list.
       for T in "${TEST_CASE[@]}"; do
           if [ "$T" = "$TEST_CNT" ]; then
               return 1
           fi
       done
       return 0
    fi
}

# Setup for new test case.
#
# @param [in] $*  Name of test case.
test_setup() {
    TEST_CNT=$((TEST_CNT+1))
    TEST_DESC="$TEST_CNT: $*"
    FAILED=
    SKIP=

    if [ "$USAGE_STRING" != "" ]; then
        # Check usage output for string to see whether we have to skip test case
        # due to wolfSSL missing features.
        check_usage_string "$USAGE_STRING"
        if [ "$?" = "0" ] ; then
            echo
            echo "$TEST_DESC"
            echo "SKIPPED"
            SKIP="missing feature"
        fi
        USAGE_STRING=
    fi

    if [ "$SKIP" = "" ]; then
        # Check whether this test case is to be run.
        check_run
        if [ "$?" = "1" ]; then
            echo
            echo "$TEST_DESC"
            TEST_PASS_CNT=$((TEST_PASS_CNT+1))
        else
            SKIP="not requested"
        fi
    fi

    # Handle skipping
    if [ "$SKIP" != "" ]; then
        TEST_SKIP_CNT=$((TEST_SKIP_CNT+1))
    fi
}

# Handle when a test case failed.
test_fail() {
    if [ "$SKIP" = "" -a "$FAILED" = "" ]; then
        TEST_PASS_CNT=$((TEST_PASS_CNT-1))
        TEST_FAIL_CNT=$((TEST_FAIL_CNT+1))
        TEST_FAIL="$TEST_FAIL$CR  $TEST_DESC"
        FAILED=yes
    fi
}

# Use asn1 to check DER produced is valid.
check_der() {
    $ASN1_EXE $tmp_der_file >$tmp_file 2>&1
    if [ "$?" != "0" ]; then
        echo
        echo "  DER result bad"
        test_fail
    fi
}

# Convert PEM file to DER
#
# @param [in] $*  Command line parameters to pem example.
convert_to_der() {
    if [ "$SKIP" = "" -a "$FAILED" = "" ]; then
        echo "    $PEM_EXE $* -out $tmp_pem_file"
        $PEM_EXE "$@" -out $tmp_der_file
        if [ "$?" != "0" ]; then
            echo "  Failed to convert to DER"
            test_fail
        fi
        check_der
    fi
}

# Compare generated DER file to existing file.
#
# @param [in] $1  File to compare to.
compare_der() {
    diff $tmp_der_file $1
    if [ "$?" != "0" ]; then
        echo "  Created DER file different from expected"
        test_fail
    fi
}

# Convert DER file to PEM
#
# PEM_TYPE contains PEM header to encode.
#
# @param [in] $*  Command line parameters to pem example.
convert_to_pem() {
    if [ "$SKIP" = "" -a "$FAILED" = "" ]; then
        echo "    $PEM_EXE --der -t \"$PEM_TYPE\" $* -out $tmp_pem_file"
        $PEM_EXE --der "$@" -t "$PEM_TYPE" -out $tmp_pem_file
        if [ "$?" != "0" ]; then
            test_fail
        fi
    fi
}

# Compare generated PEM file to existing file.
compare_pem() {
    diff $tmp_pem_file $1 >$tmp_file 2>&1
    if [ "$?" != "0" ]; then
        cat $tmp_file
        echo
        echo "  Created PEM file different from expected"
        test_fail
    fi
}

# Convert to and from PEM and DER and compare to file containing expected DER.
#
# @param [in] $1  Name of PEM file to read.
# @param [in] $2  Name of DER file to compare to.
# @param [in] $3  PEM type expected in PEM file and to place in created PEM
#                 file.
pem_der_exp() {
    if [ "$SKIP" = "" -a "$FAILED" = "" ]; then
        PEM_FILE=$1
        DER_FILE=$2
        PEM_TYPE="$3"

        # Convert PEM to DER
        convert_to_der -in $PEM_FILE
        if [ "$FAILED" = "" ]; then
          # On success, compare to DER file.
          compare_der $DER_FILE
        fi
        # Check if converting from DER to PEM is supported.
        check_usage_string $DER_TO_PEM_STRING
        if [ "$?" = "1" ]; then
            if [ "$FAILED" = "" ]; then
                # Convert expected DER file to PEM
                convert_to_pem -in $DER_FILE
            fi
            if [ "$FAILED" = "" ]; then
                # On success, compare to original PEM file.
                compare_pem $PEM_FILE
            fi
        fi
    fi
}

# Convert DER to encrypted PEM.
#
# @param [in] $@  Command line parameters to pem example when encrypting.
der_pem_enc() {
    PEM_TYPE="ENCRYPTED PRIVATE KEY"
    convert_to_pem -in ./certs/server-key.der -p yassl123 "$@"
    convert_to_der -in $tmp_pem_file -p yassl123
}


################################################################################

# Check for pem example - can't test without it.
if [ ! -x $PEM_EXE ]; then
    echo "PEM example not available, won't run"
    exit 77
fi
# Check for asn1 example - don't want to test without it.
if [ ! -x $ASN1_EXE ]; then
    echo "ASN.1 example not available, won't run"
    exit 77
fi

# Check the available features compiled into pem example.
echo "wolfSSL features:"
check_usage_string $DER_TO_PEM_STRING
if [ "$?" = "1" ]; then
    echo "  Conversion from DER to PEM support compiled in."
else
    echo "  Conversion from DER to PEM support NOT compiled in."
fi
check_usage_string $ENC_STRING
if [ "$?" = "1" ]; then
    echo "  Encryption support compiled in."
else
    echo "  Encryption support NOT compiled in."
fi
echo

# Command line parameters are test cases to run.
while [ $# -gt 0 ]; do
    TEST_CASE[${#TEST_CASE[@]}]=$1
    RUN_ALL=
    shift 1
done


test_setup "Convert PEM certificate (first of many) to DER"
convert_to_der -in ./certs/server-cert.pem

test_setup "Convert PEM certificate (second of many) to DER"
convert_to_der -in ./certs/server-cert.pem --offset 6000

test_setup "RSA private key"
pem_der_exp ./certs/server-key.pem \
            ./certs/server-key.der "RSA PRIVATE KEY"

test_setup "RSA public key"
pem_der_exp ./certs/server-keyPub.pem \
            ./certs/server-keyPub.der "RSA PUBLIC KEY"

test_setup "DH parameters"
pem_der_exp ./certs/dh3072.pem \
            ./certs/dh3072.der "DH PARAMETERS"

test_setup "X9.42 parameters"
pem_der_exp ./certs/x942dh2048.pem \
            ./certs/x942dh2048.der "X9.42 DH PARAMETERS"

USAGE_STRING="  DSA PARAMETERS"
test_setup "DSA parameters"
pem_der_exp ./certs/dsaparams.pem \
            ./certs/dsaparams.der "DSA PARAMETERS"

USAGE_STRING="  DSA PRIVATE KEY"
test_setup "DSA private key"
pem_der_exp ./certs/1024/dsa1024.pem \
            ./certs/1024/dsa1024.der "DSA PRIVATE KEY"

USAGE_STRING="  EC PRIVATE KEY"
test_setup "ECC private key"
pem_der_exp ./certs/ecc-keyPkcs8.pem \
            ./certs/ecc-keyPkcs8.der "PRIVATE KEY"

USAGE_STRING="  EC PRIVATE KEY"
test_setup "EC PRIVATE KEY"
pem_der_exp ./certs/ecc-privkey.pem \
            ./certs/ecc-privkey.der "EC PRIVATE KEY"

USAGE_STRING="  EC PARAMETERS"
test_setup "ECC parameters"
pem_der_exp ./certs/ecc-params.pem \
            ./certs/ecc-params.der "EC PARAMETERS"

test_setup "ECC public key"
pem_der_exp ./certs/ecc-keyPub.pem \
            ./certs/ecc-keyPub.der "PUBLIC KEY"

test_setup "Ed25519 public key"
pem_der_exp ./certs/ed25519/client-ed25519-key.pem \
            ./certs/ed25519/client-ed25519-key.der 'PUBLIC KEY'

test_setup "Ed25519 private key"
pem_der_exp ./certs/ed25519/client-ed25519-priv.pem \
            ./certs/ed25519/client-ed25519-priv.der 'PRIVATE KEY'

USAGE_STRING="  EDDSA PRIVATE KEY"
test_setup "EdDSA private key"
pem_der_exp ./certs/ed25519/eddsa-ed25519.pem \
            ./certs/ed25519/eddsa-ed25519.der 'EDDSA PRIVATE KEY'

test_setup "Ed448 public key"
pem_der_exp ./certs/ed448/client-ed448-key.pem \
            ./certs/ed448/client-ed448-key.der 'PUBLIC KEY'

test_setup "Ed448 private key"
pem_der_exp ./certs/ed448/client-ed448-priv.pem \
            ./certs/ed448/client-ed448-priv.der 'PRIVATE KEY'

USAGE_STRING="  CERTIFICATE REQUEST"
test_setup "Certificate Request"
pem_der_exp ./certs/csr.dsa.pem \
            ./certs/csr.dsa.der 'CERTIFICATE REQUEST'

USAGE_STRING="  X509 CRL"
test_setup "X509 CRL"
pem_der_exp ./certs/crl/caEccCrl.pem \
            ./certs/crl/caEccCrl.der 'X509 CRL'

USAGE_STRING=$ENC_STRING
test_setup "Encrypted Key with header"
convert_to_der -in ./certs/server-keyEnc.pem -p yassl123 --padding

USAGE_STRING=$ENC_STRING
test_setup "Encrypted Key - PKCS#8"
convert_to_der -in ./certs/server-keyPkcs8Enc.pem -p yassl123

USAGE_STRING=$ENC_STRING
test_setup "Encrypted Key - PKCS#8 (PKCS#12 PBE)"
convert_to_der -in ./certs/server-keyPkcs8Enc12.pem -p yassl123

USAGE_STRING="PBES1_MD5_DES"
test_setup "Encrypted Key - PKCS#8 (PKCS#5 PBES1-MD5-DES)"
convert_to_der -in ./certs/ecc-keyPkcs8Enc.pem -p yassl123

USAGE_STRING=" DES3"
test_setup "Encrypted Key - PKCS#8 (PKCS#5v2 PBE-SHA1-DES3)"
convert_to_der -in ./certs/server-keyPkcs8Enc2.pem -p yassl123

USAGE_STRING="AES-256-CBC"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 (Default: PKCS#5 PBES2 AES-256-CBC)"
der_pem_enc

USAGE_STRING="AES-256-CBC"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 - Large salt"
der_pem_enc -s 16

USAGE_STRING="AES-256-CBC"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 - 10000 iterations (DER encoding check)"
der_pem_enc -i 10000

USAGE_STRING="AES-256-CBC"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 - 100 iterations (DER encoding check)"
der_pem_enc -i 100

USAGE_STRING="AES-128-CBC"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 (PKCS#5 PBES2 AES-128-CBC)"
der_pem_enc --pbe-alg AES-128-CBC

USAGE_STRING="DES"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 (PKCS#5 PBES2 DES)"
der_pem_enc --pbe-alg DES


USAGE_STRING="DES3"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 (PKCS#5 PBES2 DES3)"
der_pem_enc --pbe-alg DES3

USAGE_STRING="PBES1_MD5_DES"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 (PKCS#5 PBES1-MD5-DES)"
der_pem_enc --pbe PBES1_MD5_DES

USAGE_STRING="PBES1_SHA1_DES"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 (PKCS#5 PBES1-SHA1-DES)"
der_pem_enc --pbe PBES1_SHA1_DES

USAGE_STRING="  SHA1_RC4_128"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 (PKCS#12 PBE-SHA1-RC4-128)"
der_pem_enc --pbe-ver PKCS12 --pbe SHA1_RC4_128

USAGE_STRING="  SHA1_DES3"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 (PKCS#12 PBE-SHA1-DES3)"
der_pem_enc --pbe-ver PKCS12 --pbe SHA1_DES3

USAGE_STRING="SHA1_40RC2_CBC"
PEM_TYPE="ENCRYPTED PRIVATE KEY"
test_setup "Encrypt Key - PKCS#8 (PKCS#12 PBE-SHA1-40RC2-CBC)"
der_pem_enc --pbe-ver PKCS12 --pbe SHA1_40RC2_CBC

# Note: PKCS#12 with SHA1_DES doesn't work as we encode as PKCS#5 SHA1_DES as
# ids are the same


# Report results
echo
if [ "$TEST_SKIP_CNT" = "0" ]; then
    echo "RESULT: $TEST_PASS_CNT/$TEST_CNT (pass/total)"
else
    echo "RESULT: $TEST_PASS_CNT/$TEST_SKIP_CNT/$TEST_CNT (pass/skip/total)"
fi
if [ "$TEST_FAIL_CNT" != "0" ]; then
    echo "FAILURES ($TEST_FAIL_CNT):$TEST_FAIL"
else
    echo "PASSED"
fi

# Cleanup temporaries
do_cleanup