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-rw-r--r--vectors/x25519/alice.key3
-rw-r--r--vectors/x25519/bob.key3
-rw-r--r--vectors/x25519/format_test_vector.py374
-rw-r--r--vectors/x25519/regenerate_test_vector.py98
-rw-r--r--vectors/x25519/x25519_test_vector.h22
5 files changed, 500 insertions, 0 deletions
diff --git a/vectors/x25519/alice.key b/vectors/x25519/alice.key
new file mode 100644
index 0000000..939797d
--- /dev/null
+++ b/vectors/x25519/alice.key
@@ -0,0 +1,3 @@
+-----BEGIN PRIVATE KEY-----
+MC4CAQAwBQYDK2VuBCIEIBCMF7aoYJIROc6rNDTmtUCcgD1Fz1pemeN1bm26p5dA
+-----END PRIVATE KEY-----
diff --git a/vectors/x25519/bob.key b/vectors/x25519/bob.key
new file mode 100644
index 0000000..775a0cd
--- /dev/null
+++ b/vectors/x25519/bob.key
@@ -0,0 +1,3 @@
+-----BEGIN PRIVATE KEY-----
+MC4CAQAwBQYDK2VuBCIEIBDN3nhskfw9TZ53kpmLbgHwLwpDQjr4TZT0NrF1ojtp
+-----END PRIVATE KEY-----
diff --git a/vectors/x25519/format_test_vector.py b/vectors/x25519/format_test_vector.py
new file mode 100644
index 0000000..51f76d1
--- /dev/null
+++ b/vectors/x25519/format_test_vector.py
@@ -0,0 +1,374 @@
+#
+# format_test_vector.py
+# -----------------------------------------
+# Formats test vector for x25519_fpga_model
+#
+# Author: Pavel Shatov
+# Copyright (c) 2017-2018, NORDUnet A/S
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+# - Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+#
+# - 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.
+#
+# - Neither the name of the NORDUnet nor the names of its contributors may
+# be used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# 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
+# HOLDER 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.
+#
+
+
+#
+USAGE = "USAGE: format_test_vector.py [openssl_binary]"
+#
+
+#
+# This script reads the test vector generated by regenerate_test_vector.py
+# and writes nicely formatted C header file and Verilog include file.
+#
+
+#
+# IMPORTANT: This will only work with OpenSSL 1.1.0, version 1.0.2 doesn't
+# support the X25519 algoritm. If you system library is the older version,
+# you can pass location of specific OpenSSL binary to use on the command line.
+#
+
+
+#
+# imports
+#
+import sys
+import subprocess
+import pysodium
+
+
+#
+# variables
+#
+OPENSSL = ""
+
+
+#
+# format one test vector
+#
+def format_c_header( f,
+ da, qax,
+ db, qbx,
+ qabx):
+
+ # convert to integers
+ da_int = int(da.hex(), 16)
+ db_int = int(db.hex(), 16)
+ qax_int = int(qax.hex(), 16)
+ qbx_int = int(qbx.hex(), 16)
+ qabx_int = int(qabx.hex(), 16)
+
+ # write all numbers in vector
+ format_c_array(f, da_int, "#define X25519_DA" + " \\\n")
+ format_c_array(f, qax_int, "#define X25519_QA_X" + " \\\n")
+
+ format_c_array(f, db_int, "#define X25519_DB" + " \\\n")
+ format_c_array(f, qbx_int, "#define X25519_QB_X" + " \\\n")
+
+ format_c_array(f, qabx_int, "#define X25519_QAB_X" + " \\\n")
+
+# #
+# # format one test vector
+# #
+# def format_verilog_include( f, curve, n,
+ # da, qax, qay,
+ # db, qbx, qby,
+ # sx, sy,
+ # gx, gy,
+ # hx, hy,
+ # qa2x, qa2y,
+ # qb2x, qb2y):
+
+ # if curve == CURVE_P256:
+ # curve_str = "P_256"
+ # msb_index = "255"
+
+ # if curve == CURVE_P384:
+ # curve_str = "P_384"
+ # msb_index = "383"
+
+ # # write all numbers in vector
+ # format_verilog_concatenation(f, n, "localparam [" + msb_index + ":0] " + curve_str + "_N" + " =\n")
+
+ # format_verilog_concatenation(f, da, "localparam [" + msb_index + ":0] " + curve_str + "_DA" + " =\n")
+ # format_verilog_concatenation(f, qax, "localparam [" + msb_index + ":0] " + curve_str + "_QA_X" + " =\n")
+ # format_verilog_concatenation(f, qay, "localparam [" + msb_index + ":0] " + curve_str + "_QA_Y" + " =\n")
+ # format_verilog_concatenation(f, qa2x, "localparam [" + msb_index + ":0] " + curve_str + "_QA2_X" + " =\n")
+ # format_verilog_concatenation(f, qa2y, "localparam [" + msb_index + ":0] " + curve_str + "_QA2_Y" + " =\n")
+
+ # format_verilog_concatenation(f, db, "localparam [" + msb_index + ":0] " + curve_str + "_DB" + " =\n")
+ # format_verilog_concatenation(f, qbx, "localparam [" + msb_index + ":0] " + curve_str + "_QB_X" + " =\n")
+ # format_verilog_concatenation(f, qby, "localparam [" + msb_index + ":0] " + curve_str + "_QB_Y" + " =\n")
+ # format_verilog_concatenation(f, qb2x, "localparam [" + msb_index + ":0] " + curve_str + "_QB2_X" + " =\n")
+ # format_verilog_concatenation(f, qb2y, "localparam [" + msb_index + ":0] " + curve_str + "_QB2_Y" + " =\n")
+
+ # format_verilog_concatenation(f, sx, "localparam [" + msb_index + ":0] " + curve_str + "_S_X" + " =\n")
+ # format_verilog_concatenation(f, sy, "localparam [" + msb_index + ":0] " + curve_str + "_S_Y" + " =\n")
+
+ # format_verilog_concatenation(f, gx, "localparam [" + msb_index + ":0] " + curve_str + "_G_X" + " =\n")
+ # format_verilog_concatenation(f, gy, "localparam [" + msb_index + ":0] " + curve_str + "_G_Y" + " =\n")
+
+ # format_verilog_concatenation(f, hx, "localparam [" + msb_index + ":0] " + curve_str + "_H_X" + " =\n")
+ # format_verilog_concatenation(f, hy, "localparam [" + msb_index + ":0] " + curve_str + "_H_Y" + " =\n")
+
+#
+# nicely format multi-word integer into C array initializer
+#
+def format_c_array(f, n, s):
+
+ # print '#define XYZ \'
+ f.write(s)
+
+ # convert number to hex string and prepend it with zeroes if necessary
+ n_hex = hex(n).lstrip("0x").rstrip("L")
+ while (len(n_hex) % 8) > 0:
+ n_hex = "0" + n_hex
+
+ # get number of 32-bit words
+ num_words = len(n_hex) // 8
+
+ # print all words in n
+ w = 0
+ while w < num_words:
+
+ n_part = ""
+
+ # add tab for every new line
+ if w == 0:
+ n_part += "\t{"
+ elif (w % 4) == 0:
+ n_part += "\t "
+
+ # add current word
+ n_part += "0x" + n_hex[8 * w : 8 * (w + 1)]
+
+ # add separator or newline
+ if (w + 1) == num_words:
+ n_part += "}\n"
+ else:
+ n_part += ", "
+ if (w % 4) == 3:
+ n_part += "\\\n"
+
+ w += 1
+
+ # write current part
+ f.write(n_part)
+
+ # write final newline
+ f.write("\n")
+
+# def format_verilog_concatenation(f, n, s):
+
+ # # print 'localparam ZZZ ='
+ # f.write(s)
+
+ # # convert number to hex string and prepend it with zeroes if necessary
+ # n_hex = hex(n).split("0x")[1]
+ # while (len(n_hex) % 8) > 0:
+ # n_hex = "0" + n_hex
+
+ # # get number of 32-bit words
+ # num_words = len(n_hex) // 8
+
+ # # print all words in n
+ # w = 0
+ # while w < num_words:
+
+ # n_part = ""
+
+ # if w == 0:
+ # n_part += "\t{"
+ # elif (w % 4) == 0:
+ # n_part += "\t "
+
+ # n_part += "32'h" + n_hex[8 * w : 8 * (w + 1)]
+
+ # if (w + 1) == num_words:
+ # n_part += "};\n"
+ # else:
+ # n_part += ", "
+ # if (w % 4) == 3:
+ # n_part += "\n"
+ # w += 1
+
+ # f.write(n_part)
+
+ # f.write("\n")
+
+
+ #
+ # returns d, qx where
+ # d is private key and qx is the corresponding public key
+ #
+def get_key(openssl, party):
+
+ # generate private key filename
+ key_file = party + ".key"
+
+ # retrieve key components using openssl
+ openssl_command = [openssl, "pkey", "-in", key_file, "-noout", "-text"]
+ openssl_stdout = subprocess.check_output(openssl_command).decode("utf-8")
+ stdout_lines = openssl_stdout.splitlines()
+
+ key_priv = ""
+ key_pub = ""
+
+ found_priv = False
+ found_pub = False
+
+ # process lines looking for "priv:" and "pub:" markers
+ for line in stdout_lines:
+
+ # found private key marker?
+ if line == "priv:":
+ found_priv = True
+ found_pub = False
+ continue
+
+ # found public key marker?
+ if line == "pub:":
+ found_pub = True
+ found_priv = False
+ continue
+
+ # found part of private key?
+ if found_priv:
+ if not line.startswith(" "):
+ found_priv = False
+ continue
+ else:
+ key_priv += line.strip()
+
+ # found part of public key?
+ if found_pub:
+ if not line.startswith(" "):
+ found_pub = False
+ continue
+ else:
+ key_pub += line.strip()
+
+ # do some cleanup and sanity checking on private key
+ # * remove colons
+ # * check length (256 bits or 384 bits)
+ key_priv = key_priv.replace(":", "")
+ if len(key_priv) != (256 / 4): sys.exit()
+
+ # do some cleanup and sanity checking on public key
+ # * remove colons
+ # * check length (256 bits)
+ key_pub = key_pub.replace(":", "")
+ if len(key_pub) != (256 / 4): sys.exit()
+
+ # convert to byte arrays
+ key_priv_bytes = bytes.fromhex(key_priv)
+ key_pub_bytes = bytes.fromhex(key_pub)
+
+ # change byte order to msb...lsb
+ key_priv_bytes = key_priv_bytes[::-1]
+ key_pub_bytes = key_pub_bytes[::-1]
+
+ # convert to integers
+ key_priv_int = int(key_priv_bytes.hex(), 16)
+ key_pub_int = int(key_pub_bytes.hex(), 16)
+
+ # another sanity check (make sure, that key_pub is actually key_priv * G)
+ key_pub_calc_bytes = pysodium.crypto_scalarmult_curve25519_base(key_priv_bytes[::-1])[::-1]
+ key_pub_calc_int = int(key_pub_calc_bytes.hex(), 16)
+
+ if (key_pub_int != key_pub_calc_int): sys.exit()
+
+ # done
+ return key_priv_bytes, key_pub_bytes
+
+ #
+ # returns the shared secret key
+ #
+def calc_shared_key(key_priv_bytes, key_pub_bytes):
+
+ key_shared_bytes = pysodium.crypto_scalarmult_curve25519(key_priv_bytes[::-1], key_pub_bytes[::-1])[::-1]
+ return key_shared_bytes
+
+
+if __name__ == "__main__":
+
+ # detect whether user requested some specific binary
+ if len(sys.argv) == 1:
+ OPENSSL = "openssl"
+ print("Using system OpenSSL library.")
+ elif len(sys.argv) == 2:
+ OPENSSL = sys.argv[1]
+ print("Using OpenSSL binary '" + OPENSSL + "'...")
+ else:
+ print(USAGE)
+
+ if len(OPENSSL) > 0:
+
+ # open output files
+ file_h = open('x25519_test_vector.h', 'w')
+ #file_v = open('ecdh_test_vectors.v', 'w')
+
+ # write headers
+ file_h.write("/* Generated automatically, do not edit. */\n\n")
+ #file_v.write("/* Generated automatically, do not edit. */\n\n")
+
+ # load keys
+ da, qax = get_key(OPENSSL, "alice")
+ db, qbx = get_key(OPENSSL, "bob")
+
+ # we derive the shared secret two different ways (from Alice's and
+ # from Bob's perspective, they must be identical of course
+ qabx = calc_shared_key(da, qbx) # Alice's secret
+ qbax = calc_shared_key(db, qax) # Bob's secret
+
+ if (qabx != qbax): sys.exit()
+
+ print("Derived shared secret.");
+
+ # format numbers and write to file
+ format_c_header( file_h,
+ da, qax,
+ db, qbx,
+ qabx)
+
+ # format_verilog_include( file_v, next_curve, n,
+ # da, qax, qay,
+ # db, qbx, qby,
+ # QAB.x, QBA.y,
+ # G.x, G.y,
+ # H.x, H.y,
+ # QA2.x, QA2.y,
+ # QB2.x, QB2.y)
+
+ # done
+ file_h.close()
+ #file_v.close()
+
+ # everything went just fine
+ print("Test vector formatted.")
+
+#
+# End of file
+#
diff --git a/vectors/x25519/regenerate_test_vector.py b/vectors/x25519/regenerate_test_vector.py
new file mode 100644
index 0000000..2d56be8
--- /dev/null
+++ b/vectors/x25519/regenerate_test_vector.py
@@ -0,0 +1,98 @@
+#
+# regenerate_test_vector.py
+# ------------------------------------------------------------
+# Generates a new randomized test vector for x25519_fpga_model
+#
+# Author: Pavel Shatov
+# Copyright (c) 2017-2018, NORDUnet A/S
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+# - Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+#
+# - 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.
+#
+# - Neither the name of the NORDUnet nor the names of its contributors may
+# be used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# 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
+# HOLDER 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.
+#
+
+#
+USAGE = "USAGE: regenerate_test_vector.py [openssl_binary]"
+#
+
+#
+# This script generates a test vector. The test vector contains two
+# private keys.
+#
+
+#
+# IMPORTANT: This will only work with OpenSSL 1.1.0, version 1.0.2 doesn't
+# support the X25519 algoritm. If you system library is the older version,
+# you can pass location of specific OpenSSL binary to use on the command line.
+#
+
+#
+# imports
+#
+import sys
+import subprocess
+
+#
+# variables
+#
+SECRET_KEY_ALICE = "alice.key"
+SECRET_KEY_BOB = "bob.key"
+
+OPENSSL = ""
+
+
+#
+# openssl_genpkey
+#
+def openssl_genpkey(binary, filename):
+
+ subprocess.call([binary, "genpkey", "-algorithm", "X25519", "-out", filename])
+
+
+#
+# __main__
+#
+if __name__ == "__main__":
+
+ # detect whether user requested some specific binary
+ if len(sys.argv) == 1:
+ OPENSSL = "openssl"
+ print("Using system OpenSSL library.")
+ elif len(sys.argv) == 2:
+ OPENSSL = sys.argv[1]
+ print("Using OpenSSL binary '" + OPENSSL + "'...")
+ else:
+ print(USAGE)
+
+ # generate two new private keys
+ if len(OPENSSL) > 0:
+ openssl_genpkey(OPENSSL, SECRET_KEY_ALICE)
+ openssl_genpkey(OPENSSL, SECRET_KEY_BOB)
+
+
+#
+# End of file
+#
diff --git a/vectors/x25519/x25519_test_vector.h b/vectors/x25519/x25519_test_vector.h
new file mode 100644
index 0000000..90e65b1
--- /dev/null
+++ b/vectors/x25519/x25519_test_vector.h
@@ -0,0 +1,22 @@
+/* Generated automatically, do not edit. */
+
+#define X25519_DA \
+ {0x4097a7ba, 0x6d6e75e3, 0x995e5acf, 0x453d809c, \
+ 0x40b5e634, 0x34abce39, 0x119260a8, 0xb6178c10}
+
+#define X25519_QA_X \
+ {0x001c3a34, 0x022f49eb, 0x9261cd26, 0xe1d07b77, \
+ 0x78c975d3, 0x1a26aae4, 0x3e6b7b69, 0x0c01d3b9}
+
+#define X25519_DB \
+ {0x693ba275, 0xb136f494, 0x4df83a42, 0x430a2ff0, \
+ 0x016e8b99, 0x92779e4d, 0x3dfc916c, 0x78decd10}
+
+#define X25519_QB_X \
+ {0x0c364b59, 0x88b70c7e, 0x22871817, 0x471552a6, \
+ 0x8bf22c0e, 0xe4c7e096, 0xa7e0f167, 0x2157f598}
+
+#define X25519_QAB_X \
+ {0x6339d13b, 0x26df661e, 0x18d23492, 0x2dcc8232, \
+ 0x85ef9b36, 0xfc92aa83, 0x0116b7ef, 0xcdc8c52b}
+