initial commit of Novena code for coretest

3 files changed, 1626 insertions, 0 deletions

diff --git a/src/sw/configure.sh b/src/sw/configure.sh
new file mode 100755
index 0000000..b3ed7cf
--- /dev/null
+++ b/src/sw/configure.sh
@@ -0,0 +1,15 @@
+#!/bin/sh -
+# bitbang a configuration to the FPGA on a Novena PVT1
+bitfile="${1-novena_fpga.bit}"
+echo "Setting export of reset pin"
+echo 135 > /sys/class/gpio/export
+echo "setting reset pin to out"
+echo out > /sys/class/gpio/gpio135/direction
+echo "flipping reset"
+echo 0 > /sys/class/gpio/gpio135/value
+echo 1 > /sys/class/gpio/gpio135/value
+echo "configuring FPGA"
+dd if=${bitfile} of=/dev/spidev2.0 bs=128
+echo "turning on clock to FPGA"
+# compile devmem2 from novena-scope-drivers/userspace/devmem2.c
+./devmem2 0x020c8160 w 0x00000D2B
diff --git a/src/sw/hash_tester.c b/src/sw/hash_tester.c
new file mode 100644
index 0000000..d02db41
--- /dev/null
+++ b/src/sw/hash_tester.c
@@ -0,0 +1,942 @@
+/* 
+ * hash_tester.c
+ * --------------
+ * This program sends several commands to the coretest_hashes subsystem
+ * in order to verify the SHA-1, SHA-256 and SHA-512/x hash function
+ * cores.
+ *
+ * Note: This version of the program talks to the FPGA over an I2C bus.
+ *
+ * The single and dual block test cases are taken from the
+ * NIST KAT document:
+ * http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA_All.pdf
+ *
+ * 
+ * Authors: Joachim Strömbergson, Paul Selkirk
+ * Copyright (c) 2014, SUNET
+ * 
+ * Redistribution and use in source and binary forms, with or 
+ * without modification, are permitted provided that the following 
+ * conditions are met: 
+ * 
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in 
+ *    the documentation and/or other materials provided with the 
+ *    distribution. 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <time.h>
+#include <linux/i2c-dev.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+
+/* I2C configuration */
+#define I2C_dev  "/dev/i2c-2"
+#define I2C_addr 0x0f
+
+/* command codes */
+#define SOC       0x55
+#define EOC       0xaa
+#define READ_CMD  0x10
+#define WRITE_CMD 0x11
+
+/* response codes */
+#define SOR       0xaa
+#define EOR       0x55
+#define UNKNOWN   0xfe
+#define ERROR     0xfd
+#define READ_OK   0x7f
+#define WRITE_OK  0x7e
+#define RESET_OK  0x7d
+
+/* addresses and codes common to all hash cores */
+#define ADDR_NAME0              0x00
+#define ADDR_NAME1              0x01
+#define ADDR_VERSION            0x02
+#define ADDR_CTRL               0x08
+#define CTRL_INIT_CMD           1
+#define CTRL_NEXT_CMD           2
+#define ADDR_STATUS             0x09
+#define STATUS_READY_BIT        0
+#define STATUS_VALID_BIT        1
+
+/* addresses and codes for the specific hash cores */
+#define SHA1_ADDR_PREFIX        0x10
+#define SHA1_ADDR_BLOCK         0x10
+#define SHA1_BLOCK_LEN          16
+#define SHA1_ADDR_DIGEST        0x20
+#define SHA1_DIGEST_LEN         5
+
+#define SHA256_ADDR_PREFIX      0x20
+#define SHA256_ADDR_BLOCK       0x10
+#define SHA256_BLOCK_LEN        16
+#define SHA256_ADDR_DIGEST      0x20
+#define SHA256_DIGEST_LEN       8
+
+#define SHA512_ADDR_PREFIX      0x30
+#define SHA512_CTRL_MODE_LOW    2
+#define SHA512_CTRL_MODE_HIGH   3
+#define SHA512_ADDR_BLOCK       0x10
+#define SHA512_BLOCK_LEN        32
+#define SHA512_ADDR_DIGEST      0x40
+#define SHA512_DIGEST_LEN       16
+#define MODE_SHA_512_224        0
+#define MODE_SHA_512_256        1
+#define MODE_SHA_384            2
+#define MODE_SHA_512            3
+
+int i2cfd;
+int debug = 0;
+
+/* SHA-1/SHA-256 One Block Message Sample
+   Input Message: "abc" */
+const uint32_t NIST_512_SINGLE[] =
+{ 0x61626380, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000018 };
+
+const uint32_t SHA1_SINGLE_DIGEST[] =
+{ 0xa9993e36, 0x4706816a, 0xba3e2571, 0x7850c26c,
+  0x9cd0d89d };
+
+const uint32_t SHA256_SINGLE_DIGEST[] =
+{ 0xBA7816BF, 0x8F01CFEA, 0x414140DE, 0x5DAE2223,
+  0xB00361A3, 0x96177A9C, 0xB410FF61, 0xF20015AD };
+
+/* SHA-1/SHA-256 Two Block Message Sample
+   Input Message: "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" */
+const uint32_t NIST_512_DOUBLE0[] =
+{ 0x61626364, 0x62636465, 0x63646566, 0x64656667,
+  0x65666768, 0x66676869, 0x6768696A, 0x68696A6B,
+  0x696A6B6C, 0x6A6B6C6D, 0x6B6C6D6E, 0x6C6D6E6F,
+  0x6D6E6F70, 0x6E6F7071, 0x80000000, 0x00000000 };
+const uint32_t NIST_512_DOUBLE1[] =
+{ 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x000001C0 };
+
+const uint32_t SHA1_DOUBLE_DIGEST[] =
+{ 0x84983E44, 0x1C3BD26E, 0xBAAE4AA1, 0xF95129E5,
+  0xE54670F1 };
+
+const uint32_t SHA256_DOUBLE_DIGEST[] =
+{ 0x248D6A61, 0xD20638B8, 0xE5C02693, 0x0C3E6039,
+  0xA33CE459, 0x64FF2167, 0xF6ECEDD4, 0x19DB06C1 };
+
+/* SHA-512 One Block Message Sample
+   Input Message: "abc" */
+const uint32_t NIST_1024_SINGLE[] =
+{ 0x61626380, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000018 };
+
+const uint32_t SHA512_224_SINGLE_DIGEST[] =
+{ 0x4634270f, 0x707b6a54, 0xdaae7530, 0x460842e2,
+  0x0e37ed26, 0x5ceee9a4, 0x3e8924aa };
+const uint32_t SHA512_256_SINGLE_DIGEST[] =
+{ 0x53048e26, 0x81941ef9, 0x9b2e29b7, 0x6b4c7dab,
+  0xe4c2d0c6, 0x34fc6d46, 0xe0e2f131, 0x07e7af23 };
+const uint32_t SHA384_SINGLE_DIGEST[] =
+{ 0xcb00753f, 0x45a35e8b, 0xb5a03d69, 0x9ac65007,
+  0x272c32ab, 0x0eded163, 0x1a8b605a, 0x43ff5bed,
+  0x8086072b, 0xa1e7cc23, 0x58baeca1, 0x34c825a7 };
+const uint32_t SHA512_SINGLE_DIGEST[] =
+{ 0xddaf35a1, 0x93617aba, 0xcc417349, 0xae204131,
+  0x12e6fa4e, 0x89a97ea2, 0x0a9eeee6, 0x4b55d39a,
+  0x2192992a, 0x274fc1a8, 0x36ba3c23, 0xa3feebbd,
+  0x454d4423, 0x643ce80e, 0x2a9ac94f, 0xa54ca49f };
+
+/* SHA-512 Two Block Message Sample
+   Input Message: "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
+   "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu" */
+const uint32_t NIST_1024_DOUBLE0[] =
+{ 0x61626364, 0x65666768, 0x62636465, 0x66676869,
+  0x63646566, 0x6768696a, 0x64656667, 0x68696a6b,
+  0x65666768, 0x696a6b6c, 0x66676869, 0x6a6b6c6d,
+  0x6768696a, 0x6b6c6d6e, 0x68696a6b, 0x6c6d6e6f,
+  0x696a6b6c, 0x6d6e6f70, 0x6a6b6c6d, 0x6e6f7071,
+  0x6b6c6d6e, 0x6f707172, 0x6c6d6e6f, 0x70717273,
+  0x6d6e6f70, 0x71727374, 0x6e6f7071, 0x72737475,
+  0x80000000, 0x00000000, 0x00000000, 0x00000000 };
+const uint32_t NIST_1024_DOUBLE1[] =
+{ 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000000,
+  0x00000000, 0x00000000, 0x00000000, 0x00000380 };
+
+const uint32_t SHA512_224_DOUBLE_DIGEST[] = 
+{ 0x23fec5bb, 0x94d60b23, 0x30819264, 0x0b0c4533,
+  0x35d66473, 0x4fe40e72, 0x68674af9 };
+const uint32_t SHA512_256_DOUBLE_DIGEST[] =
+{ 0x3928e184, 0xfb8690f8, 0x40da3988, 0x121d31be,
+  0x65cb9d3e, 0xf83ee614, 0x6feac861, 0xe19b563a };
+const uint32_t SHA384_DOUBLE_DIGEST[] =
+{ 0x09330c33, 0xf71147e8, 0x3d192fc7, 0x82cd1b47,
+  0x53111b17, 0x3b3b05d2, 0x2fa08086, 0xe3b0f712,
+  0xfcc7c71a, 0x557e2db9, 0x66c3e9fa, 0x91746039 };
+const uint32_t SHA512_DOUBLE_DIGEST[] =
+{ 0x8e959b75, 0xdae313da, 0x8cf4f728, 0x14fc143f,
+  0x8f7779c6, 0xeb9f7fa1, 0x7299aead, 0xb6889018,
+  0x501d289e, 0x4900f7e4, 0x331b99de, 0xc4b5433a,
+  0xc7d329ee, 0xb6dd2654, 0x5e96e55b, 0x874be909 };
+
+/* ---------------- I2C low-level code ---------------- */
+int i2c_setup(char *dev, int addr)
+{
+    i2cfd = open(dev, O_RDWR);
+    if (i2cfd < 0) {
+	fprintf(stderr, "Unable to open %s: ", dev);
+	perror("");
+	i2cfd = 0;
+	return 1;
+    }
+
+    if (ioctl(i2cfd, I2C_SLAVE, addr) < 0) {
+	fprintf(stderr, "Unable to set I2C slave device 0x%02x: ", addr);
+	perror("");
+	return 1;
+    }
+
+    return 0;
+}
+
+int i2c_write(uint8_t *buf, int len)
+{
+    if (debug) {
+	int i;
+	printf("write [");
+	for (i = 0; i < len; ++i)
+	    printf(" %02x", buf[i]);
+	printf(" ]\n");
+    }
+
+    if (write(i2cfd, buf, len) != len) {
+	perror("i2c write failed");
+	return 1;
+    }
+
+    return 0;
+}
+
+int i2c_read(uint8_t *buf, int len)
+{
+    int i;
+
+    if (debug)
+	printf("read  [");
+
+    for (i = 0; i < len; ++i) {
+	if (read(i2cfd, &buf[i], 1) != 1) {
+	    fprintf(stderr, "i2c read failed on byte %d: ", i);
+	    perror("");
+	    return 1;
+	}
+	if (debug)
+	    printf(" %02x", buf[i]);
+    }
+
+    if (debug)
+	printf(" ]\n");
+
+    return 0;
+}
+
+/* ---------------- test-case low-level code ---------------- */
+int tc_send_write_cmd(uint8_t addr0, uint8_t addr1, uint32_t data)
+{
+    uint8_t buf[9];
+
+    buf[0] = SOC;
+    buf[1] = WRITE_CMD;
+    buf[2] = addr0;
+    buf[3] = addr1;
+    buf[4] = (data >> 24) & 0xff;
+    buf[5] = (data >> 16) & 0xff;
+    buf[6] = (data >> 8) & 0xff;
+    buf[7] = data & 0xff;
+    buf[8] = EOC;
+
+    return i2c_write(buf, sizeof(buf));
+}
+
+int tc_send_read_cmd(uint8_t addr0, uint8_t addr1)
+{
+    uint8_t buf[5];
+
+    buf[0] = SOC;
+    buf[1] = READ_CMD;
+    buf[2] = addr0;
+    buf[3] = addr1;
+    buf[4] = EOC;
+
+    return i2c_write(buf, sizeof(buf));
+}
+
+int tc_get_resp(uint8_t *expected, int len)
+{
+    uint8_t buf[9];
+    int i;
+
+    if (i2c_read(buf, len) != 0)
+	return 1;
+
+    for (i = 0; i < len; ++i) {
+	if (buf[i] != expected[i]) {
+	    fprintf(stderr, "response byte %d: expected 0x%02x, got 0x%02x\n",
+		    i, expected[i], buf[i]);
+	    return 1;
+	}
+    }
+
+    return 0;
+}
+
+int tc_get_write_resp(uint8_t addr0, uint8_t addr1)
+{
+    uint8_t expected[5];
+
+    expected[0] = SOR;
+    expected[1] = WRITE_OK;
+    expected[2] = addr0;
+    expected[3] = addr1;
+    expected[4] = EOR;
+
+    return tc_get_resp(expected, sizeof(expected));
+}
+
+int tc_get_read_resp(uint8_t addr0, uint8_t addr1, uint32_t data)
+{
+    uint8_t expected[9];
+
+    expected[0] = SOR;
+    expected[1] = READ_OK;
+    expected[2] = addr0;
+    expected[3] = addr1;
+    expected[4] = (data >> 24) & 0xff;
+    expected[5] = (data >> 16) & 0xff;
+    expected[6] = (data >> 8) & 0xff;
+    expected[7] = data & 0xff;
+    expected[8] = EOR;
+
+    return tc_get_resp(expected, sizeof(expected));
+}
+
+int tc_write(uint8_t addr0, uint8_t addr1, uint32_t data)
+{
+    return (tc_send_write_cmd(addr0, addr1, data) ||
+	    tc_get_write_resp(addr0, addr1));
+}
+
+int tc_read(uint8_t addr0, uint8_t addr1, uint32_t data)
+{
+    return (tc_send_read_cmd(addr0, addr1) ||
+	    tc_get_read_resp(addr0, addr1, data));
+}
+
+int tc_init(uint8_t addr0)
+{
+    return tc_write(addr0, ADDR_CTRL, CTRL_INIT_CMD);
+}
+
+int tc_next(uint8_t addr0)
+{
+    return tc_write(addr0, ADDR_CTRL, CTRL_NEXT_CMD);
+}
+
+int tc_wait(uint8_t addr0, uint8_t status)
+{
+    uint8_t buf[9];
+
+    do {
+	if (tc_send_read_cmd(addr0, ADDR_STATUS) != 0)
+	    return 1;
+	if (i2c_read(buf, 9) != 0)
+	    return 1;
+    } while ((buf[7] & status) != status);
+
+    return 0;
+}
+
+int tc_wait_ready(uint8_t addr0)
+{
+    return tc_wait(addr0, STATUS_READY_BIT);
+}
+
+int tc_wait_valid(uint8_t addr0)
+{
+    return tc_wait(addr0, STATUS_VALID_BIT);
+}
+
+/* ---------------- SHA-1 test cases ---------------- */
+
+int sha1_read(uint8_t addr, uint32_t data)
+{
+    return tc_read(SHA1_ADDR_PREFIX, addr, data);
+}
+
+int sha1_write(uint8_t addr, uint32_t data)
+{
+    return tc_write(SHA1_ADDR_PREFIX, addr, data);
+}
+
+int sha1_init(void)
+{
+    return tc_init(SHA1_ADDR_PREFIX);
+}
+
+int sha1_next(void)
+{
+    return tc_next(SHA1_ADDR_PREFIX);
+}
+
+int sha1_wait_ready(void)
+{
+    return tc_wait_ready(SHA1_ADDR_PREFIX);
+}
+
+int sha1_wait_valid(void)
+{
+    return tc_wait_valid(SHA1_ADDR_PREFIX);
+}
+
+/* TC1: Read name and version from SHA-1 core. */
+int TC1(void)
+{
+    uint32_t name0   = 0x73686131;	/* "sha1" */
+    uint32_t name1   = 0x20202020;	/* "    " */
+    uint32_t version = 0x302e3530;	/* "0.50" */
+
+    printf("TC1: Reading name, type and version words from SHA-1 core.\n");
+
+    return 
+	sha1_read(ADDR_NAME0, name0) ||
+	sha1_read(ADDR_NAME1, name1) ||
+	sha1_read(ADDR_VERSION, version);
+}
+
+/* TC2: SHA-1 Single block message test as specified by NIST. */
+int TC2(void)
+{
+    const uint32_t *block = NIST_512_SINGLE;
+    const uint32_t *expected = SHA1_SINGLE_DIGEST;
+    int i;
+
+    printf("TC2: Single block message test for SHA-1.\n");
+
+    /* Write block to SHA-1. */
+    for (i = 0; i < SHA1_BLOCK_LEN; ++i) {
+	if (sha1_write(SHA1_ADDR_BLOCK + i, block[i]) != 0)
+	    return 1;
+    }
+
+    /* Start initial block hashing, wait and check status. */
+    if ((sha1_init() != 0) || (sha1_wait_valid() != 0))
+	return 1;
+
+    /* Extract the digest. */
+    for (i = 0; i < SHA1_DIGEST_LEN; ++i) {
+	if (sha1_read(SHA1_ADDR_DIGEST + i, expected[i]) != 0)
+	    return 1;
+    }
+
+    return 0;
+}
+
+/* TC3: SHA-1 Double block message test as specified by NIST. */
+int TC3(void)
+{
+    const uint32_t *block[2] = { NIST_512_DOUBLE0, NIST_512_DOUBLE1 };
+    static const uint32_t block0_expected[] =
+	{ 0xF4286818, 0xC37B27AE, 0x0408F581, 0x84677148, 0x4A566572 };
+    const uint32_t *expected = SHA1_DOUBLE_DIGEST;
+    int i;
+
+    printf("TC3: Double block message test for SHA-1.\n");
+
+    /* Write first block to SHA-1. */
+    for (i = 0; i < SHA1_BLOCK_LEN; ++i) {
+	if (sha1_write(SHA1_ADDR_BLOCK + i, block[0][i]) != 0)
+	    return 1;
+    }
+
+    /* Start initial block hashing, wait and check status. */
+    if ((sha1_init() != 0) || (sha1_wait_valid() != 0))
+	return 1;
+
+    /* Extract the first digest. */
+    for (i = 0; i < SHA1_DIGEST_LEN; ++i) {
+	if (sha1_read(SHA1_ADDR_DIGEST + i, block0_expected[i]) != 0)
+	    return 1;
+    }
+
+    /* Write second block to SHA-1. */
+    for (i = 0; i < SHA1_BLOCK_LEN; ++i) {
+	if (sha1_write(SHA1_ADDR_BLOCK + i, block[1][i]) != 0)
+	    return 1;
+    }
+
+    /* Start next block hashing, wait and check status. */
+    if ((sha1_next() != 0) || (sha1_wait_valid() != 0))
+	return 1;
+
+    /* Extract the second digest. */
+    for (i = 0; i < SHA1_DIGEST_LEN; ++i) {
+	if (sha1_read(SHA1_ADDR_DIGEST + i, expected[i]) != 0)
+	    return 1;
+    }
+
+    return 0;
+}
+
+/* ---------------- SHA-256 test cases ---------------- */
+
+int sha256_read(uint8_t addr, uint32_t data)
+{
+    return tc_read(SHA256_ADDR_PREFIX, addr, data);
+}
+
+int sha256_write(uint8_t addr, uint32_t data)
+{
+    return tc_write(SHA256_ADDR_PREFIX, addr, data);
+}
+
+int sha256_init(void)
+{
+    return tc_init(SHA256_ADDR_PREFIX);
+}
+
+int sha256_next(void)
+{
+    return tc_next(SHA256_ADDR_PREFIX);
+}
+
+int sha256_wait_ready(void)
+{
+    return tc_wait_ready(SHA256_ADDR_PREFIX);
+}
+
+int sha256_wait_valid(void)
+{
+    return tc_wait_valid(SHA256_ADDR_PREFIX);
+}
+
+/* TC4: Read name and version from SHA-256 core. */
+int TC4(void)
+{
+    uint32_t name0     = 0x73686132;	/* "sha2" */
+    uint32_t name1     = 0x2d323536;	/* "-256" */
+    uint32_t version   = 0x302e3830;	/* "0.80" */
+
+    printf("TC4: Reading name, type and version words from SHA-256 core.\n");
+
+    return
+	sha256_read(ADDR_NAME0, name0) ||
+	sha256_read(ADDR_NAME1, name1) ||
+	sha256_read(ADDR_VERSION, version);
+}
+
+/* TC5: SHA-256 Single block message test as specified by NIST. */
+int TC5(void)
+{
+    const uint32_t *block = NIST_512_SINGLE;
+    const uint32_t *expected = SHA256_SINGLE_DIGEST;
+    int i;
+
+    printf("TC5: Single block message test for SHA-256.\n");
+
+    /* Write block to SHA-256. */
+    for (i = 0; i < SHA256_BLOCK_LEN; ++i) {
+	if (sha256_write(SHA256_ADDR_BLOCK + i, block[i]) != 0)
+	    return 1;
+    }
+
+    /* Start initial block hashing, wait and check status. */
+    if ((sha256_init() != 0) || (sha256_wait_valid() != 0))
+	return 1;
+
+    /* Extract the digest. */
+    for (i = 0; i < SHA256_DIGEST_LEN; ++i) {
+	if (sha256_read(SHA256_ADDR_DIGEST + i, expected[i]) != 0)
+	    return 1;
+    }
+
+
+    return 0;
+}
+
+/* TC6: SHA-1 Double block message test as specified by NIST. */
+int TC6(void)
+{
+    const uint32_t *block[2] = { NIST_512_DOUBLE0, NIST_512_DOUBLE1 };
+    static const uint32_t block0_expected[] = 
+	{ 0x85E655D6, 0x417A1795, 0x3363376A, 0x624CDE5C,
+	  0x76E09589, 0xCAC5F811, 0xCC4B32C1, 0xF20E533A };
+    const uint32_t *expected = SHA256_DOUBLE_DIGEST;
+    int i;
+
+    printf("TC6: Double block message test for SHA-256.\n");
+
+    /* Write first block to SHA-256. */
+    for (i = 0; i < SHA256_BLOCK_LEN; ++i) {
+	if (sha256_write(SHA256_ADDR_BLOCK + i, block[0][i]) != 0)
+	    return 1;
+    }
+
+    /* Start initial block hashing, wait and check status. */
+    if ((sha256_init() != 0) || (sha256_wait_valid() != 0))
+	return 1;
+
+    /* Extract the first digest. */
+    for (i = 0; i < SHA256_DIGEST_LEN; ++i) {
+	if (sha256_read(SHA256_ADDR_DIGEST + i, block0_expected[i]) != 0)
+	    return 1;
+    }
+
+    /* Write second block to SHA-256. */
+    for (i = 0; i < SHA256_BLOCK_LEN; ++i) {
+	if (sha256_write(SHA256_ADDR_BLOCK + i, block[1][i]) != 0)
+	    return 1;
+    }
+
+    /* Start next block hashing, wait and check status. */
+    if ((sha256_next() != 0) || (sha256_wait_valid() != 0))
+	return 1;
+
+    /* Extract the second digest. */
+    for (i = 0; i < SHA256_DIGEST_LEN; ++i) {
+	if (sha256_read(SHA256_ADDR_DIGEST + i, expected[i]) != 0)
+	    return 1;
+    }
+
+    return 0;
+}
+
+/* TC7: SHA-256 Huge message test. */
+int TC7(void)
+{
+    static const uint32_t block[] =
+	{ 0xaa55aa55, 0xdeadbeef, 0x55aa55aa, 0xf00ff00f,
+	  0xaa55aa55, 0xdeadbeef, 0x55aa55aa, 0xf00ff00f,
+	  0xaa55aa55, 0xdeadbeef, 0x55aa55aa, 0xf00ff00f,
+	  0xaa55aa55, 0xdeadbeef, 0x55aa55aa, 0xf00ff00f };
+
+    /* final digest after 1000 iterations */
+    static const uint32_t expected[] = 
+	{ 0x7638f3bc, 0x500dd1a6, 0x586dd4d0, 0x1a1551af,
+	  0xd821d235, 0x2f919e28, 0xd5842fab, 0x03a40f2a };
+
+    int i, n = 1000;
+
+    printf("TC7: Message with %d blocks test for SHA-256.\n", n);
+
+    /* Write first block to SHA-256. */
+    for (i = 0; i < SHA256_BLOCK_LEN; ++i) {
+	if (sha256_write( SHA256_ADDR_BLOCK + i, block[i]) != 0)
+	    return 1;
+    }
+
+    /* Start initial block hashing, wait and check status. */
+    if ((sha256_init() != 0) || (sha256_wait_ready() != 0))
+	return 1;
+
+    /* First block done. Do the rest. */
+    for (i = 1; i < n; ++i) {
+	/* Start next block hashing, wait and check status. */
+	if ((sha256_next() != 0) || (sha256_wait_ready() != 0))
+	    return 1;
+    }
+
+    /* XXX valid is probably set at the same time as ready */
+    if (sha256_wait_valid() != 0)
+	return 1;
+    /* Extract the final digest. */
+    for (i = 0; i < SHA256_DIGEST_LEN; ++i) {
+	if (sha256_read(SHA256_ADDR_DIGEST + i, expected[i]) != 0)
+	    return 1;
+    }
+
+    return 0;
+}
+
+/* ---------------- SHA-512 test cases ---------------- */
+
+int sha512_read(uint8_t addr, uint32_t data)
+{
+    return tc_read(SHA512_ADDR_PREFIX, addr, data);
+}
+
+int sha512_write(uint8_t addr, uint32_t data)
+{
+    return tc_write(SHA512_ADDR_PREFIX, addr, data);
+}
+
+int sha512_init(uint8_t mode)
+{
+    return tc_write(SHA512_ADDR_PREFIX, ADDR_CTRL,
+		    CTRL_INIT_CMD + (mode << SHA512_CTRL_MODE_LOW));
+}
+
+int sha512_next(uint8_t mode)
+{
+    return tc_write(SHA512_ADDR_PREFIX, ADDR_CTRL,
+		    CTRL_NEXT_CMD + (mode << SHA512_CTRL_MODE_LOW));
+}
+
+int sha512_wait_ready(void)
+{
+    return tc_wait_ready(SHA512_ADDR_PREFIX);
+}
+
+int sha512_wait_valid(void)
+{
+    return tc_wait_valid(SHA512_ADDR_PREFIX);
+}
+
+/* TC8: Read name and version from SHA-512 core. */
+int TC8(void)
+{
+    uint32_t name0         = 0x73686132;	/* "sha2" */
+    uint32_t name1         = 0x2d353132;	/* "-512" */
+    uint32_t version       = 0x302e3830;	/* "0.80" */
+
+    printf("TC8: Reading name, type and version words from SHA-512 core.\n");
+
+    return 
+	sha512_read(ADDR_NAME0, name0) ||
+	sha512_read(ADDR_NAME1, name1) ||
+	sha512_read(ADDR_VERSION, version);
+}
+
+/* TC9: SHA-512 Single block message test as specified by NIST.
+   We do this for all modes. */
+int tc9(uint8_t mode, const uint32_t *expected, int len)
+{
+    const uint32_t *block = NIST_1024_SINGLE;
+    int i;
+
+    /* Write block to SHA-512. */
+    for (i = 0; i < SHA512_BLOCK_LEN; ++i) {
+	if (sha512_write(SHA512_ADDR_BLOCK + i, block[i]) != 0)
+	    return 1;
+    }
+
+    /* Start initial block hashing, wait and check status. */
+    if ((sha512_init(mode) != 0) || (sha512_wait_valid() != 0))
+	return 1;
+
+    /* Extract the digest. */
+    for (i = 0; i < len/4; ++i) {
+	if (sha512_read(SHA512_ADDR_DIGEST + i, expected[i]) != 0)
+	    return 1;
+    }
+
+    return 0;
+}
+
+int TC9(void)
+{
+    printf("TC9-1: Single block message test for SHA-512/224.\n");
+    if (tc9(MODE_SHA_512_224, SHA512_224_SINGLE_DIGEST,
+	    sizeof(SHA512_224_SINGLE_DIGEST)) != 0)
+	return 1;
+
+    printf("TC9-2: Single block message test for SHA-512/256.\n");
+    if (tc9(MODE_SHA_512_256, SHA512_256_SINGLE_DIGEST,
+	    sizeof(SHA512_256_SINGLE_DIGEST)) != 0)
+	return 1;
+
+    printf("TC9-3: Single block message test for SHA-384.\n");
+    if (tc9(MODE_SHA_384, SHA384_SINGLE_DIGEST,
+	    sizeof(SHA384_SINGLE_DIGEST)) != 0)
+	return 1;
+
+    printf("TC9-4: Single block message test for SHA-512.\n");
+    if (tc9(MODE_SHA_512, SHA512_SINGLE_DIGEST,
+	    sizeof(SHA512_SINGLE_DIGEST)) != 0)
+	return 1;
+
+    return 0;
+}
+
+/* TC10: SHA-512 Double block message test as specified by NIST.
+   We do this for all modes. */
+int tc10(uint8_t mode, const uint32_t *expected, int len)
+{
+    const uint32_t *block[2] = { NIST_1024_DOUBLE0, NIST_1024_DOUBLE1 };
+    int i;
+
+    /* Write first block to SHA-512. */
+    for (i = 0; i < SHA512_BLOCK_LEN; ++i) {
+	if (sha512_write(SHA512_ADDR_BLOCK + i, block[0][i]) != 0)
+	    return 1;
+    }
+
+    /* Start initial block hashing, wait and check status. */
+    if ((sha512_init(mode) != 0) || (sha512_wait_ready() != 0))
+	return 1;
+
+    /* Write second block to SHA-512. */
+    for (i = 0; i < SHA512_BLOCK_LEN; ++i) {
+	if (sha512_write(SHA512_ADDR_BLOCK + i, block[1][i]) != 0)
+	    return 1;
+    }
+
+    /* Start next block hashing, wait and check status. */
+    if ((sha512_next(mode) != 0) || (sha512_wait_valid() != 0))
+	return 1;
+
+    /* Extract the digest. */
+    for (i = 0; i < len/4; ++i) {
+	if (sha512_read(SHA512_ADDR_DIGEST + i, expected[i]) != 0)
+	    return 1;
+    }
+
+    return 0;
+}
+
+int TC10(void)
+{
+    printf("TC10-1: Double block message test for SHA-512/224.\n");
+    if (tc10(MODE_SHA_512_224, SHA512_224_DOUBLE_DIGEST,
+	     sizeof(SHA512_224_DOUBLE_DIGEST)) != 0)
+	return 1;
+
+    printf("TC10-2: Double block message test for SHA-512/256.\n");
+    if (tc10(MODE_SHA_512_256, SHA512_256_DOUBLE_DIGEST,
+	     sizeof(SHA512_256_DOUBLE_DIGEST)) != 0)
+	return 1;
+
+    printf("TC10-3: Double block message test for SHA-384.\n");
+    if (tc10(MODE_SHA_384, SHA384_DOUBLE_DIGEST,
+	     sizeof(SHA384_DOUBLE_DIGEST)) != 0)
+	return 1;
+
+    printf("TC10-4: Double block message test for SHA-512.\n");
+    if (tc10(MODE_SHA_512, SHA512_DOUBLE_DIGEST,
+	     sizeof(SHA512_DOUBLE_DIGEST)) != 0)
+	return 1;
+
+    return 0;
+}
+
+/* ---------------- main ---------------- */
+
+int main(int argc, char *argv[])
+{
+    typedef int (*tcfp)(void);
+    tcfp all_tests[] = { TC1, TC2, TC3, TC4, TC5, TC6, TC7, TC8, TC9, TC10 };
+    tcfp sha1_tests[] = { TC1, TC2, TC3 };
+    tcfp sha256_tests[] = { TC4, TC5, TC6, TC7 };
+    tcfp sha512_tests[] = { TC8, TC9, TC10 };
+
+    char *usage = "Usage: %s [-d] [-i I2C_device] [-a I2C_addr] tc...\n";
+    char *dev = I2C_dev;
+    int addr = I2C_addr;
+    int i, j, opt;
+
+    while ((opt = getopt(argc, argv, "di:a:")) != -1) {
+	switch (opt) {
+	case 'h':
+	case '?':
+	    printf(usage, argv[0]);
+	    return 0;
+	case 'd':
+	    debug = 1;
+	    break;
+	case 'i':
+	    dev = optarg;
+	    break;
+	case 'a':
+	    addr = (int)strtol(optarg, NULL, 0);
+	    if ((addr < 0x03) || (addr > 0x77)) {
+		fprintf(stderr, "addr must be between 0x03 and 0x77\n");
+		return 1;
+	    }
+	    break;
+	default:
+	    fprintf(stderr, usage, argv[0]);
+	    return 1;
+	}
+    }
+
+    if (i2c_setup(dev, addr) != 0)
+	return 1;
+
+    /* no args == run all tests */
+    if (optind >= argc) {
+	for (j = 0; j < sizeof(all_tests)/sizeof(all_tests[0]); ++j)
+	    if (all_tests[j]() != 0)
+		return 1;
+	return 0;
+    }
+
+    for (i = optind; i < argc; ++i) {
+	if (strcmp(argv[i], "sha1") == 0) {
+	    for (j = 0; j < sizeof(sha1_tests)/sizeof(sha1_tests[0]); ++j)
+		if (sha1_tests[j]() != 0)
+		    return 1;
+	}
+	else if (strcmp(argv[i], "sha256") == 0) {
+	    for (j = 0; j < sizeof(sha256_tests)/sizeof(sha256_tests[0]); ++j)
+		if (sha256_tests[j]() != 0)
+		    return 1;
+	}
+	else if (strcmp(argv[i], "sha512") == 0) {
+	    for (j = 0; j < sizeof(sha512_tests)/sizeof(sha512_tests[0]); ++j)
+		if (sha512_tests[j]() != 0)
+		    return 1;
+	}
+	else if (strcmp(argv[i], "all") == 0) {
+	    for (j = 0; j < sizeof(all_tests)/sizeof(all_tests[0]); ++j)
+		if (all_tests[j]() != 0)
+		    return 1;
+	}
+	else if (isdigit(argv[i][0]) &&
+		 (((j = atoi(argv[i])) > 0) &&
+		  (j <= sizeof(all_tests)/sizeof(all_tests[0])))) {
+	    if (all_tests[j - 1]() != 0)
+		return 1;
+	}
+	else {
+	    fprintf(stderr, "unknown test case %s\n", argv[i]);
+	    return 1;
+	}
+    }
+
+    return 0;
+}
diff --git a/src/sw/hash_tester.py b/src/sw/hash_tester.py
new file mode 100755
index 0000000..e2b3777
--- /dev/null
+++ b/src/sw/hash_tester.py
@@ -0,0 +1,669 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#=======================================================================
+#
+# hash_tester.py
+# --------------
+# This program sends several commands to the coretest_hashes subsystem
+# in order to verify the SHA-1, SHA-256 and SHA-512/x hash function
+# cores. The program will use the built in hash implementations in
+# Python to do functional comparison and validation.
+#
+# This version of the program talks to the FPGA over an I2C bus, but
+# does not require any additional modules.
+#
+# The single and dual block test cases are taken from the
+# NIST KAT document:
+# http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA_All.pdf
+#
+# 
+# Authors: Joachim Strömbergson, Paul Selkirk
+# Copyright (c) 2014, SUNET
+# 
+# Redistribution and use in source and binary forms, with or 
+# without modification, are permitted provided that the following 
+# conditions are met: 
+# 
+# 1. Redistributions of source code must retain the above copyright 
+#    notice, this list of conditions and the following disclaimer. 
+# 
+# 2. Redistributions in binary form must reproduce the above copyright 
+#    notice, this list of conditions and the following disclaimer in 
+#    the documentation and/or other materials provided with the 
+#    distribution. 
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+#=======================================================================
+ 
+#-------------------------------------------------------------------
+# Python module imports.
+#-------------------------------------------------------------------
+import sys
+import io
+import fcntl
+
+#-------------------------------------------------------------------
+# Defines.
+#-------------------------------------------------------------------
+
+# addresses and codes common to all hash cores
+ADDR_NAME0       = 0x00
+ADDR_NAME1       = 0x01
+ADDR_VERSION     = 0x02
+ADDR_CTRL        = 0x08
+CTRL_INIT_CMD    = 1
+CTRL_NEXT_CMD    = 2
+ADDR_STATUS      = 0x09
+STATUS_READY_BIT = 0
+STATUS_VALID_BIT = 1
+
+#----------------------------------------------------------------
+# NIST sample message blocks and expected digests
+#----------------------------------------------------------------
+
+# SHA-1/SHA-256 One Block Message Sample
+# Input Message: "abc"
+NIST_512_SINGLE = [ 0x61626380, 0x00000000, 0x00000000, 0x00000000,
+                    0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                    0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                    0x00000000, 0x00000000, 0x00000000, 0x00000018 ]
+
+SHA1_SINGLE_DIGEST   = [ 0xa9993e36, 0x4706816a, 0xba3e2571, 0x7850c26c,
+                         0x9cd0d89d ]
+
+SHA256_SINGLE_DIGEST = [ 0xBA7816BF, 0x8F01CFEA, 0x414140DE, 0x5DAE2223,
+                         0xB00361A3, 0x96177A9C, 0xB410FF61, 0xF20015AD ]
+
+# SHA-1/SHA-256 Two Block Message Sample
+# Input Message: "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
+NIST_512_DOUBLE0 = [ 0x61626364, 0x62636465, 0x63646566, 0x64656667,
+                     0x65666768, 0x66676869, 0x6768696A, 0x68696A6B,
+                     0x696A6B6C, 0x6A6B6C6D, 0x6B6C6D6E, 0x6C6D6E6F,
+                     0x6D6E6F70, 0x6E6F7071, 0x80000000, 0x00000000 ]
+NIST_512_DOUBLE1 = [ 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x000001C0 ]
+
+SHA1_DOUBLE_DIGEST   = [ 0x84983E44, 0x1C3BD26E, 0xBAAE4AA1, 0xF95129E5,
+                         0xE54670F1 ]
+
+SHA256_DOUBLE_DIGEST = [ 0x248D6A61, 0xD20638B8, 0xE5C02693, 0x0C3E6039,
+                         0xA33CE459, 0x64FF2167, 0xF6ECEDD4, 0x19DB06C1 ]
+
+# SHA-512 One Block Message Sample
+# Input Message: "abc"
+NIST_1024_SINGLE = [ 0x61626380, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                     0x00000000, 0x00000000, 0x00000000, 0x00000018 ]
+
+SHA512_224_SINGLE_DIGEST = [0x4634270f, 0x707b6a54, 0xdaae7530, 0x460842e2,
+                            0x0e37ed26, 0x5ceee9a4, 0x3e8924aa]
+SHA512_256_SINGLE_DIGEST = [0x53048e26, 0x81941ef9, 0x9b2e29b7, 0x6b4c7dab,
+                            0xe4c2d0c6, 0x34fc6d46, 0xe0e2f131, 0x07e7af23]
+SHA384_SINGLE_DIGEST     = [0xcb00753f, 0x45a35e8b, 0xb5a03d69, 0x9ac65007,
+                            0x272c32ab, 0x0eded163, 0x1a8b605a, 0x43ff5bed,
+                            0x8086072b, 0xa1e7cc23, 0x58baeca1, 0x34c825a7]
+SHA512_SINGLE_DIGEST     = [0xddaf35a1, 0x93617aba, 0xcc417349, 0xae204131,
+                            0x12e6fa4e, 0x89a97ea2, 0x0a9eeee6, 0x4b55d39a,
+                            0x2192992a, 0x274fc1a8, 0x36ba3c23, 0xa3feebbd,
+                            0x454d4423, 0x643ce80e, 0x2a9ac94f, 0xa54ca49f]
+
+# SHA-512 Two Block Message Sample
+# Input Message: "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
+# "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"
+NIST_1024_DOUBLE0 = [ 0x61626364, 0x65666768, 0x62636465, 0x66676869,
+                      0x63646566, 0x6768696a, 0x64656667, 0x68696a6b,
+                      0x65666768, 0x696a6b6c, 0x66676869, 0x6a6b6c6d,
+                      0x6768696a, 0x6b6c6d6e, 0x68696a6b, 0x6c6d6e6f,
+                      0x696a6b6c, 0x6d6e6f70, 0x6a6b6c6d, 0x6e6f7071,
+                      0x6b6c6d6e, 0x6f707172, 0x6c6d6e6f, 0x70717273,
+                      0x6d6e6f70, 0x71727374, 0x6e6f7071, 0x72737475,
+                      0x80000000, 0x00000000, 0x00000000, 0x00000000 ]
+NIST_1024_DOUBLE1 = [ 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                      0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                      0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                      0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                      0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                      0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                      0x00000000, 0x00000000, 0x00000000, 0x00000000,
+                      0x00000000, 0x00000000, 0x00000000, 0x00000380 ]
+
+SHA512_224_DOUBLE_DIGEST = [ 0x23fec5bb, 0x94d60b23, 0x30819264, 0x0b0c4533,
+                             0x35d66473, 0x4fe40e72, 0x68674af9 ]
+SHA512_256_DOUBLE_DIGEST = [ 0x3928e184, 0xfb8690f8, 0x40da3988, 0x121d31be,
+                             0x65cb9d3e, 0xf83ee614, 0x6feac861, 0xe19b563a ]
+SHA384_DOUBLE_DIGEST     = [ 0x09330c33, 0xf71147e8, 0x3d192fc7, 0x82cd1b47,
+                             0x53111b17, 0x3b3b05d2, 0x2fa08086, 0xe3b0f712,
+                             0xfcc7c71a, 0x557e2db9, 0x66c3e9fa, 0x91746039 ]
+SHA512_DOUBLE_DIGEST     = [ 0x8e959b75, 0xdae313da, 0x8cf4f728, 0x14fc143f,
+                             0x8f7779c6, 0xeb9f7fa1, 0x7299aead, 0xb6889018,
+                             0x501d289e, 0x4900f7e4, 0x331b99de, 0xc4b5433a,
+                             0xc7d329ee, 0xb6dd2654, 0x5e96e55b, 0x874be909 ]
+
+def hexlist(list):
+    return "[ " + ' '.join('%02x' % b for b in list) + " ]"
+
+#----------------------------------------------------------------
+# I2C class
+#----------------------------------------------------------------
+
+# default configuration
+I2C_dev = "/dev/i2c-2"
+I2C_addr = 0x0f
+
+# from /usr/include/linux/i2c-dev.h
+I2C_SLAVE = 0x0703
+
+class I2C:
+    # file handle for the i2c device
+    file = None
+
+    # constructor: initialize the i2c communications channel
+    def __init__(self, dev=I2C_dev, addr=I2C_addr):
+        self.dev = dev
+        self.addr = addr
+        try:
+            self.file = io.FileIO(self.dev, 'r+b')
+        except IOError as e:
+            print "Unable to open %s: %s" % (self.dev, e.strerror)
+            sys.exit(1)
+        try:
+            fcntl.ioctl(self.file, I2C_SLAVE, self.addr)
+        except IOError as e:
+            print "Unable to set I2C slave device 0x%02x: %s" % (self.addr, e.strerror)
+            sys.exit(1)
+
+    # destructor: close the i2c communications channel
+    def __del__(self):
+        if (self.file):
+            self.file.close()
+            
+    # write a command to the i2c device
+    def write(self, buf):
+        if DEBUG:
+            print "write %s" % hexlist(buf)
+        self.file.write(bytearray(buf))
+
+    # read 5 or 9 response bytes to a buffer
+    def read(self, len):
+        buf = []
+        # read() on the i2c device will only return 1 byte at a time
+        for i in range(len):
+            buf.append(ord(self.file.read(1)))
+        if DEBUG:
+            print "read  %s" % hexlist(buf)
+        return buf
+
+#----------------------------------------------------------------
+# test-case class
+#----------------------------------------------------------------
+
+# command codes
+SOC                   = 0x55
+EOC                   = 0xaa
+READ_CMD              = 0x10
+WRITE_CMD             = 0x11
+
+# response codes
+SOR                   = 0xaa
+EOR                   = 0x55
+READ_OK               = 0x7f
+WRITE_OK              = 0x7e
+
+class TcError(Exception):
+    pass
+
+class tc:
+    def __init__(self, i2c, addr0, addr1):
+        self.i2c = i2c
+        self.addr0 = addr0
+        self.addr1 = addr1
+
+    def send_write_cmd(self, data):
+        buf = [SOC, WRITE_CMD, self.addr0, self.addr1]
+        for s in (24, 16, 8, 0):
+            buf.append(data >> s & 0xff)
+        buf.append(EOC)
+        self.i2c.write(buf)
+
+    def send_read_cmd(self):
+        buf = [SOC, READ_CMD, self.addr0, self.addr1, EOC]
+        self.i2c.write(buf)
+
+    def get_resp(self, expected):
+        buf = self.i2c.read(len(expected))
+        if (buf != expected):
+            print "expected %s,\nreceived %s" % (hexlist(expected), hexlist(buf))
+            raise TcError()
+
+    def get_write_resp(self):
+        expected = [SOR, WRITE_OK, self.addr0, self.addr1, EOR]
+        self.get_resp(expected)
+
+    def get_read_resp(self, data):
+        expected = [SOR, READ_OK, self.addr0, self.addr1]
+        for s in (24, 16, 8, 0):
+            expected.append(data >> s & 0xff)
+        expected.append(EOR)
+        self.get_resp(expected)
+
+    def write(self, data):
+        self.send_write_cmd(data)
+        self.get_write_resp()
+
+    def read(self, data):
+        self.send_read_cmd()
+        self.get_read_resp(data)
+
+def tc_write(i2c, addr0, addr1, data):
+    tc(i2c, addr0, addr1).write(data)
+
+def tc_read(i2c, addr0, addr1, data):
+    tc(i2c, addr0, addr1).read(data)
+
+def tc_init(i2c, addr0):
+    tc(i2c, addr0, ADDR_CTRL).write(CTRL_INIT_CMD)
+
+def tc_next(i2c, addr0):
+    tc(i2c, addr0, ADDR_CTRL).write(CTRL_NEXT_CMD)
+
+def tc_wait(i2c, addr0, status):
+    t = tc(i2c, addr0, ADDR_STATUS)
+    while 1:
+        t.send_read_cmd()
+        buf = t.i2c.read(9)
+        if ((buf[7] & status) == status):
+            break
+
+def tc_wait_ready(i2c, addr0):
+    tc_wait(i2c, addr0, STATUS_READY_BIT)
+
+def tc_wait_valid(i2c, addr0):
+    tc_wait(i2c, addr0, STATUS_VALID_BIT)
+
+#----------------------------------------------------------------
+# SHA-1 test cases
+#----------------------------------------------------------------
+SHA1_ADDR_PREFIX      = 0x10
+SHA1_ADDR_BLOCK       = 0x10
+SHA1_ADDR_DIGEST      = 0x20
+
+def sha1_read(i2c, addr, data):
+    tc_read(i2c, SHA1_ADDR_PREFIX, addr, data)
+
+def sha1_write(i2c, addr, data):
+    tc_write(i2c, SHA1_ADDR_PREFIX, addr, data)
+
+def sha1_init(i2c):
+    tc_init(i2c, SHA1_ADDR_PREFIX)
+
+def sha1_next(i2c):
+    tc_next(i2c, SHA1_ADDR_PREFIX)
+
+def sha1_wait_ready(i2c):
+    tc_wait_ready(i2c, SHA1_ADDR_PREFIX)
+
+def sha1_wait_valid(i2c):
+    tc_wait_valid(i2c, SHA1_ADDR_PREFIX)
+
+# TC1: Read name and version from SHA-1 core.
+def TC1(i2c):
+    print "TC1: Reading name, type and version words from SHA-1 core."
+
+    sha1_read(i2c, ADDR_NAME0, 0x73686131)	# "sha1"
+    sha1_read(i2c, ADDR_NAME1, 0x20202020)	# "    "
+    sha1_read(i2c, ADDR_VERSION, 0x302e3530)	# "0.50"
+
+# TC2: SHA-1 Single block message test as specified by NIST.
+def TC2(i2c):
+    block = NIST_512_SINGLE
+    expected = SHA1_SINGLE_DIGEST
+
+    print "TC2: Single block message test for SHA-1."
+
+    # Write block to SHA-1.
+    for i in range(len(block)):
+        sha1_write(i2c, SHA1_ADDR_BLOCK + i, block[i])
+
+    # Start initial block hashing, wait and check status.
+    sha1_init(i2c)
+    sha1_wait_valid(i2c)
+
+    # Extract the digest.
+    for i in range(len(expected)):
+        sha1_read(i2c, SHA1_ADDR_DIGEST + i, expected[i])
+
+# TC3: SHA-1 Double block message test as specified by NIST.
+def TC3(i2c):
+    block = [ NIST_512_DOUBLE0, NIST_512_DOUBLE1 ]
+    block0_expected = [ 0xF4286818, 0xC37B27AE, 0x0408F581, 0x84677148,
+                        0x4A566572 ]
+    expected = SHA1_DOUBLE_DIGEST
+
+    print "TC3: Double block message test for SHA-1."
+
+    # Write first block to SHA-1.
+    for i in range(len(block[0])):
+        sha1_write(i2c, SHA1_ADDR_BLOCK + i, block[0][i])
+
+    # Start initial block hashing, wait and check status.
+    sha1_init(i2c)
+    sha1_wait_valid(i2c)
+
+    # Extract the first digest.
+    for i in range(len(block0_expected)):
+        sha1_read(i2c, SHA1_ADDR_DIGEST + i, block0_expected[i])
+
+    # Write second block to SHA-1.
+    for i in range(len(block[1])):
+        sha1_write(i2c, SHA1_ADDR_BLOCK + i, block[1][i])
+
+    # Start next block hashing, wait and check status.
+    sha1_next(i2c)
+    sha1_wait_valid(i2c)
+
+    # Extract the second digest.
+    for i in range(len(expected)):
+        sha1_read(i2c, SHA1_ADDR_DIGEST + i, expected[i])
+
+#----------------------------------------------------------------
+# SHA-256 test cases
+#----------------------------------------------------------------
+SHA256_ADDR_PREFIX      = 0x20
+SHA256_ADDR_BLOCK       = 0x10
+SHA256_ADDR_DIGEST      = 0x20
+
+def sha256_read(i2c, addr, data):
+    tc_read(i2c, SHA256_ADDR_PREFIX, addr, data)
+
+def sha256_write(i2c, addr, data):
+    tc_write(i2c, SHA256_ADDR_PREFIX, addr, data)
+
+def sha256_init(i2c):
+    tc_init(i2c, SHA256_ADDR_PREFIX)
+
+def sha256_next(i2c):
+    tc_next(i2c, SHA256_ADDR_PREFIX)
+
+def sha256_wait_ready(i2c):
+    tc_wait_ready(i2c, SHA256_ADDR_PREFIX)
+
+def sha256_wait_valid(i2c):
+    tc_wait_valid(i2c, SHA256_ADDR_PREFIX)
+
+# TC4: Read name and version from SHA-256 core.
+def TC4(i2c):
+    print "TC4: Reading name, type and version words from SHA-256 core."
+
+    sha256_read(i2c, ADDR_NAME0, 0x73686132)	# "sha2"
+    sha256_read(i2c, ADDR_NAME1, 0x2d323536)	# "-256"
+    sha256_read(i2c, ADDR_VERSION, 0x302e3830)	# "0.80"
+
+# TC5: SHA-256 Single block message test as specified by NIST.
+def TC5(i2c):
+    block = NIST_512_SINGLE
+    expected = SHA256_SINGLE_DIGEST
+
+    print "TC5: Single block message test for SHA-256."
+
+    # Write block to SHA-256.
+    for i in range(len(block)):
+        sha256_write(i2c, SHA256_ADDR_BLOCK + i, block[i])
+
+    # Start initial block hashing, wait and check status.
+    sha256_init(i2c)
+    sha256_wait_valid(i2c)
+
+    # Extract the digest.
+    for i in range(len(expected)):
+        sha256_read(i2c, SHA256_ADDR_DIGEST + i, expected[i])
+
+# TC6: SHA-256 Double block message test as specified by NIST.
+def TC6(i2c):
+    block = [ NIST_512_DOUBLE0, NIST_512_DOUBLE1 ]
+    block0_expected = [ 0x85E655D6, 0x417A1795, 0x3363376A, 0x624CDE5C,
+                        0x76E09589, 0xCAC5F811, 0xCC4B32C1, 0xF20E533A ]
+    expected = SHA256_DOUBLE_DIGEST
+
+    print "TC6: Double block message test for SHA-256."
+
+    # Write first block to SHA-256.
+    for i in range(len(block[0])):
+        sha256_write(i2c, SHA256_ADDR_BLOCK + i, block[0][i])
+
+    # Start initial block hashing, wait and check status.
+    sha256_init(i2c)
+    sha256_wait_valid(i2c)
+
+    # Extract the first digest.
+    for i in range(len(block0_expected)):
+        sha256_read(i2c, SHA256_ADDR_DIGEST + i, block0_expected[i])
+
+    # Write second block to SHA-256.
+    for i in range(len(block[1])):
+        sha256_write(i2c, SHA256_ADDR_BLOCK + i, block[1][i])
+
+    # Start next block hashing, wait and check status.
+    sha256_next(i2c)
+    sha256_wait_valid(i2c)
+
+    # Extract the second digest.
+    for i in range(len(expected)):
+        sha256_read(i2c, SHA256_ADDR_DIGEST + i, expected[i])
+
+# TC7: SHA-256 Huge message test.
+def TC7(i2c):
+    block = [ 0xaa55aa55, 0xdeadbeef, 0x55aa55aa, 0xf00ff00f,
+              0xaa55aa55, 0xdeadbeef, 0x55aa55aa, 0xf00ff00f,
+              0xaa55aa55, 0xdeadbeef, 0x55aa55aa, 0xf00ff00f,
+              0xaa55aa55, 0xdeadbeef, 0x55aa55aa, 0xf00ff00f ]
+    expected = [ 0x7638f3bc, 0x500dd1a6, 0x586dd4d0, 0x1a1551af,
+                 0xd821d235, 0x2f919e28, 0xd5842fab, 0x03a40f2a ]
+    n = 1000
+
+    print "TC7: Message with %d blocks test for SHA-256." % n
+
+    # Write first block to SHA-256.
+    for i in range(len(block)):
+        sha256_write(i2c, SHA256_ADDR_BLOCK + i, block[i])
+
+    # Start initial block hashing, wait and check status.
+    sha256_init(i2c)
+    sha256_wait_ready(i2c)
+
+    # First block done. Do the rest.
+    for i in range(n - 1):
+        # Start next block hashing, wait and check status.
+        sha256_next(i2c)
+        sha256_wait_ready(i2c)
+
+    # XXX valid is probably set at the same time as ready
+    sha256_wait_valid(i2c)
+
+    # Extract the final digest.
+    for i in range(len(expected)):
+        sha256_read(i2c, SHA256_ADDR_DIGEST + i, expected[i])
+
+#----------------------------------------------------------------
+# SHA-512 test cases
+#----------------------------------------------------------------
+SHA512_ADDR_PREFIX      = 0x30
+SHA512_ADDR_BLOCK       = 0x10
+SHA512_ADDR_DIGEST      = 0x40
+SHA512_CTRL_MODE_LOW    = 2
+SHA512_CTRL_MODE_HIGH   = 3
+MODE_SHA_512_224 = 0
+MODE_SHA_512_256 = 1
+MODE_SHA_384     = 2
+MODE_SHA_512     = 3
+
+def sha512_read(i2c, addr, data):
+    tc_read(i2c, SHA512_ADDR_PREFIX, addr, data)
+
+def sha512_write(i2c, addr, data):
+    tc_write(i2c, SHA512_ADDR_PREFIX, addr, data)
+
+def sha512_init(i2c, mode):
+    tc_write(i2c, SHA512_ADDR_PREFIX, ADDR_CTRL,
+             CTRL_INIT_CMD + (mode << SHA512_CTRL_MODE_LOW))
+
+def sha512_next(i2c, mode):
+    tc_write(i2c, SHA512_ADDR_PREFIX, ADDR_CTRL,
+             CTRL_NEXT_CMD + (mode << SHA512_CTRL_MODE_LOW))
+
+def sha512_wait_ready(i2c):
+    tc_wait_ready(i2c, SHA512_ADDR_PREFIX)
+
+def sha512_wait_valid(i2c):
+    tc_wait_valid(i2c, SHA512_ADDR_PREFIX)
+
+# TC8: Read name and version from SHA-512 core.
+def TC8(i2c):
+    print "TC8: Reading name, type and version words from SHA-512 core."
+
+    sha512_read(i2c, ADDR_NAME0, 0x73686132)	# "sha2"
+    sha512_read(i2c, ADDR_NAME1, 0x2d353132)	# "-512"
+    sha512_read(i2c, ADDR_VERSION, 0x302e3830)	# "0.80"
+
+# TC9: SHA-512 Single block message test as specified by NIST.
+# We do this for all modes.
+def TC9(i2c):
+    def tc9(i2c, mode, expected):
+        block = NIST_1024_SINGLE
+
+        # Write block to SHA-512.
+        for i in range(len(block)):
+            sha512_write(i2c, SHA512_ADDR_BLOCK + i, block[i])
+
+        # Start initial block hashing, wait and check status.
+        sha512_init(i2c, mode)
+        sha512_wait_valid(i2c)
+
+        # Extract the digest.
+        for i in range(len(expected)):
+            sha512_read(i2c, SHA512_ADDR_DIGEST + i, expected[i])
+
+    print "TC9-1: Single block message test for SHA-512/224."
+    tc9(i2c, MODE_SHA_512_224, SHA512_224_SINGLE_DIGEST)
+
+    print "TC9-2: Single block message test for SHA-512/256."
+    tc9(i2c, MODE_SHA_512_256, SHA512_256_SINGLE_DIGEST)
+
+    print "TC9-3: Single block message test for SHA-384."
+    tc9(i2c, MODE_SHA_384, SHA384_SINGLE_DIGEST)
+
+    print "TC9-4: Single block message test for SHA-512."
+    tc9(i2c, MODE_SHA_512, SHA512_SINGLE_DIGEST)
+
+# TC10: SHA-512 Single block message test as specified by NIST.
+# We do this for all modes.
+def TC10(i2c):
+    def tc10(i2c, mode, expected):
+        block = [ NIST_1024_DOUBLE0, NIST_1024_DOUBLE1 ]
+
+        # Write first block to SHA-512.
+        for i in range(len(block[0])):
+            sha512_write(i2c, SHA512_ADDR_BLOCK + i, block[0][i])
+
+        # Start initial block hashing, wait and check status.
+        sha512_init(i2c, mode)
+        sha512_wait_ready(i2c)
+
+        # Write second block to SHA-512.
+        for i in range(len(block[1])):
+            sha512_write(i2c, SHA512_ADDR_BLOCK + i, block[1][i])
+
+        # Start next block hashing, wait and check status.
+        sha512_next(i2c, mode)
+        sha512_wait_valid(i2c)
+
+        # Extract the digest.
+        for i in range(len(expected)):
+            sha512_read(i2c, SHA512_ADDR_DIGEST + i, expected[i])
+
+    print "TC10-1: Double block message test for SHA-512/224."
+    tc10(i2c, MODE_SHA_512_224, SHA512_224_DOUBLE_DIGEST)
+
+    print "TC10-2: Double block message test for SHA-512/256."
+    tc10(i2c, MODE_SHA_512_256, SHA512_256_DOUBLE_DIGEST)
+
+    print "TC10-3: Double block message test for SHA-384."
+    tc10(i2c, MODE_SHA_384, SHA384_DOUBLE_DIGEST)
+
+    print "TC10-4: Double block message test for SHA-512."
+    tc10(i2c, MODE_SHA_512, SHA512_DOUBLE_DIGEST)
+
+
+#----------------------------------------------------------------
+# main
+#----------------------------------------------------------------
+if __name__ == '__main__':
+    import argparse
+
+    all_tests = [ TC1, TC2, TC3, TC4, TC5, TC6, TC7, TC8, TC9, TC10 ]
+    sha1_tests = all_tests[0:3]
+    sha256_tests = all_tests[3:7]
+    sha512_tests = all_tests[7:]
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-d', '--debug', action='store_true',
+                        help='add debugging/trace information')
+    parser.add_argument('-i', dest='dev', default=I2C_dev,
+                        help='I2C device name (default ' + I2C_dev + ')')
+    parser.add_argument('-a', dest='addr', type=lambda x:int(x,0), default=I2C_addr,
+                        help='I2C device address (default ' + hex(I2C_addr) + ')')
+    parser.add_argument('test_cases', metavar='TC', nargs='*',
+                        help='test case number, "sha1", "sha256", "sha512", or "all"')
+    args = parser.parse_args()
+    DEBUG = args.debug
+    i = I2C(args.dev, args.addr)
+
+    if (not args.test_cases):
+        for TC in all_tests:
+            TC(i)
+    else:
+        for t in args.test_cases:
+            if (t == 'sha1'):
+                for TC in sha1_tests:
+                    TC(i)
+            elif (t == 'sha256'):
+                for TC in sha256_tests:
+                    TC(i)
+            elif (t == 'sha512'):
+                for TC in sha512_tests:
+                    TC(i)
+            elif (t == 'all'):
+                for TC in all_tests:
+                    TC(i)
+            else:
+                try:
+                    n = int(t)
+                except:
+                    print 'invalid test case %s' % t
+                else:
+                    if ((n < 1) or (n > len(all_tests))):
+                        print 'invalid test case %d' % n
+                    else:
+                        all_tests[n-1](i)
+
+#=======================================================================
+# EOF hash_tester.py
+#=======================================================================