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-rw-r--r--comm/third_party/libgcrypt/tests/t-cv25519.c650
1 files changed, 650 insertions, 0 deletions
diff --git a/comm/third_party/libgcrypt/tests/t-cv25519.c b/comm/third_party/libgcrypt/tests/t-cv25519.c
new file mode 100644
index 0000000000..0de50a02de
--- /dev/null
+++ b/comm/third_party/libgcrypt/tests/t-cv25519.c
@@ -0,0 +1,650 @@
+/* t-cv25519.c - Check the cv25519 crypto
+ * Copyright (C) 2016 g10 Code GmbH
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdarg.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "stopwatch.h"
+
+#define PGM "t-cv25519"
+#include "t-common.h"
+#define N_TESTS 18
+
+
+static void
+print_mpi (const char *text, gcry_mpi_t a)
+{
+ gcry_error_t err;
+ char *buf;
+ void *bufaddr = &buf;
+
+ err = gcry_mpi_aprint (GCRYMPI_FMT_HEX, bufaddr, NULL, a);
+ if (err)
+ fprintf (stderr, "%s: [error printing number: %s]\n",
+ text, gpg_strerror (err));
+ else
+ {
+ fprintf (stderr, "%s: %s\n", text, buf);
+ gcry_free (buf);
+ }
+}
+
+
+static void
+show_note (const char *format, ...)
+{
+ va_list arg_ptr;
+
+ if (!verbose && getenv ("srcdir"))
+ fputs (" ", stderr); /* To align above "PASS: ". */
+ else
+ fprintf (stderr, "%s: ", PGM);
+ va_start (arg_ptr, format);
+ vfprintf (stderr, format, arg_ptr);
+ if (*format && format[strlen(format)-1] != '\n')
+ putc ('\n', stderr);
+ va_end (arg_ptr);
+}
+
+
+/* Convert STRING consisting of hex characters into its binary
+ representation and return it as an allocated buffer. The valid
+ length of the buffer is returned at R_LENGTH. The string is
+ delimited by end of string. The function returns NULL on
+ error. */
+static void *
+hex2buffer (const char *string, size_t *r_length)
+{
+ const char *s;
+ unsigned char *buffer;
+ size_t length;
+
+ buffer = xmalloc (strlen(string)/2+1);
+ length = 0;
+ for (s=string; *s; s +=2 )
+ {
+ if (!hexdigitp (s) || !hexdigitp (s+1))
+ return NULL; /* Invalid hex digits. */
+ ((unsigned char*)buffer)[length++] = xtoi_2 (s);
+ }
+ *r_length = length;
+ return buffer;
+}
+
+static void
+reverse_buffer (unsigned char *buffer, unsigned int length)
+{
+ unsigned int tmp, i;
+
+ for (i=0; i < length/2; i++)
+ {
+ tmp = buffer[i];
+ buffer[i] = buffer[length-1-i];
+ buffer[length-1-i] = tmp;
+ }
+}
+
+
+/*
+ * Test X25519 functionality through higher layer crypto routines.
+ *
+ * Input: K (as hex string), U (as hex string), R (as hex string)
+ *
+ * where R is expected result of X25519 (K, U).
+ *
+ * It calls gcry_pk_encrypt with Curve25519 private key and let
+ * it compute X25519.
+ */
+static void
+test_cv_hl (int testno, const char *k_str, const char *u_str,
+ const char *result_str)
+{
+ gpg_error_t err;
+ void *buffer = NULL;
+ size_t buflen;
+ gcry_sexp_t s_pk = NULL;
+ gcry_mpi_t mpi_k = NULL;
+ gcry_sexp_t s_data = NULL;
+ gcry_sexp_t s_result = NULL;
+ gcry_sexp_t s_tmp = NULL;
+ unsigned char *res = NULL;
+ size_t res_len;
+
+ if (verbose > 1)
+ info ("Running test %d\n", testno);
+
+ if (!(buffer = hex2buffer (k_str, &buflen)) || buflen != 32)
+ {
+ fail ("error building s-exp for test %d, %s: %s",
+ testno, "k", "invalid hex string");
+ goto leave;
+ }
+
+ reverse_buffer (buffer, buflen);
+ if ((err = gcry_mpi_scan (&mpi_k, GCRYMPI_FMT_USG, buffer, buflen, NULL)))
+ {
+ fail ("error converting MPI for test %d: %s", testno, gpg_strerror (err));
+ goto leave;
+ }
+
+ if ((err = gcry_sexp_build (&s_data, NULL, "%m", mpi_k)))
+ {
+ fail ("error building s-exp for test %d, %s: %s",
+ testno, "data", gpg_strerror (err));
+ goto leave;
+ }
+
+ xfree (buffer);
+ if (!(buffer = hex2buffer (u_str, &buflen)) || buflen != 32)
+ {
+ fail ("error building s-exp for test %d, %s: %s",
+ testno, "u", "invalid hex string");
+ goto leave;
+ }
+
+ /*
+ * The procedure of decodeUCoordinate will be done internally
+ * by _gcry_ecc_mont_decodepoint. So, we just put the little-endian
+ * binary to build S-exp.
+ *
+ * We could add the prefix 0x40, but libgcrypt also supports
+ * format with no prefix. So, it is OK not to put the prefix.
+ */
+ if ((err = gcry_sexp_build (&s_pk, NULL,
+ "(public-key"
+ " (ecc"
+ " (curve \"Curve25519\")"
+ " (flags djb-tweak)"
+ " (q%b)))", (int)buflen, buffer)))
+ {
+ fail ("error building s-exp for test %d, %s: %s",
+ testno, "pk", gpg_strerror (err));
+ goto leave;
+ }
+
+ xfree (buffer);
+ buffer = NULL;
+
+ if ((err = gcry_pk_encrypt (&s_result, s_data, s_pk)))
+ fail ("gcry_pk_encrypt failed for test %d: %s", testno,
+ gpg_strerror (err));
+
+ s_tmp = gcry_sexp_find_token (s_result, "s", 0);
+ if (!s_tmp || !(res = gcry_sexp_nth_buffer (s_tmp, 1, &res_len)))
+ fail ("gcry_pk_encrypt failed for test %d: %s", testno, "missing value");
+ else
+ {
+ char *r, *r0;
+ int i;
+
+ /* To skip the prefix 0x40, for-loop start with i=1 */
+ r0 = r = xmalloc (2*(res_len)+1);
+ if (!r0)
+ {
+ fail ("memory allocation for test %d", testno);
+ goto leave;
+ }
+
+ for (i=1; i < res_len; i++, r += 2)
+ snprintf (r, 3, "%02x", res[i]);
+ if (strcmp (result_str, r0))
+ {
+ fail ("gcry_pk_encrypt failed for test %d: %s",
+ testno, "wrong value returned");
+ info (" expected: '%s'", result_str);
+ info (" got: '%s'", r0);
+ }
+ xfree (r0);
+ }
+
+ leave:
+ xfree (res);
+ gcry_mpi_release (mpi_k);
+ gcry_sexp_release (s_tmp);
+ gcry_sexp_release (s_result);
+ gcry_sexp_release (s_data);
+ gcry_sexp_release (s_pk);
+ xfree (buffer);
+}
+
+/*
+ * Test X25519 functionality through the API for X25519.
+ *
+ * Input: K (as hex string), U (as hex string), R (as hex string)
+ *
+ * where R is expected result of X25519 (K, U).
+ *
+ */
+static void
+test_cv_x25519 (int testno, const char *k_str, const char *u_str,
+ const char *result_str)
+{
+ gpg_error_t err;
+ void *scalar = NULL;
+ void *point = NULL;
+ size_t buflen;
+ unsigned char result[32];
+ char result_hex[65];
+ int i;
+ int algo = GCRY_ECC_CURVE25519;
+ unsigned int keylen;
+
+ if (verbose > 1)
+ info ("Running test %d\n", testno);
+
+ if (!(keylen = gcry_ecc_get_algo_keylen (algo)))
+ {
+ fail ("error getting keylen for test %d", testno);
+ goto leave;
+ }
+
+ if (keylen != 32)
+ {
+ fail ("error invalid keylen for test %d", testno);
+ goto leave;
+ }
+
+ if (!(scalar = hex2buffer (k_str, &buflen)) || buflen != keylen)
+ {
+ fail ("error of input for test %d, %s: %s",
+ testno, "k", "invalid hex string");
+ goto leave;
+ }
+
+ if (!(point = hex2buffer (u_str, &buflen)) || buflen != keylen)
+ {
+ fail ("error of input for test %d, %s: %s",
+ testno, "u", "invalid hex string");
+ goto leave;
+ }
+
+ if ((err = gcry_ecc_mul_point (algo, result, scalar, point)))
+ fail ("gcry_ecc_mul_point failed for test %d: %s", testno,
+ gpg_strerror (err));
+
+ for (i=0; i < keylen; i++)
+ snprintf (&result_hex[i*2], 3, "%02x", result[i]);
+
+ if (strcmp (result_str, result_hex))
+ {
+ fail ("gcry_ecc_mul_point failed for test %d: %s",
+ testno, "wrong value returned");
+ info (" expected: '%s'", result_str);
+ info (" got: '%s'", result_hex);
+ }
+
+ leave:
+ xfree (scalar);
+ xfree (point);
+}
+
+static void
+test_cv (int testno, const char *k_str, const char *u_str,
+ const char *result_str)
+{
+ test_cv_hl (testno, k_str, u_str, result_str);
+ test_cv_x25519 (testno, k_str, u_str, result_str);
+}
+
+/*
+ * Test iterative X25519 computation through lower layer MPI routines.
+ *
+ * Input: K (as hex string), ITER, R (as hex string)
+ *
+ * where R is expected result of iterating X25519 by ITER times.
+ *
+ */
+static void
+test_it (int testno, const char *k_str, int iter, const char *result_str)
+{
+ gcry_ctx_t ctx;
+ gpg_error_t err;
+ void *buffer = NULL;
+ size_t buflen;
+ gcry_mpi_t mpi_k = NULL;
+ gcry_mpi_t mpi_x = NULL;
+ gcry_mpi_point_t P = NULL;
+ gcry_mpi_point_t Q;
+ int i;
+ gcry_mpi_t mpi_kk = NULL;
+
+ if (verbose > 1)
+ info ("Running test %d: iteration=%d\n", testno, iter);
+
+ gcry_mpi_ec_new (&ctx, NULL, "Curve25519");
+ Q = gcry_mpi_point_new (0);
+
+ if (!(buffer = hex2buffer (k_str, &buflen)) || buflen != 32)
+ {
+ fail ("error scanning MPI for test %d, %s: %s",
+ testno, "k", "invalid hex string");
+ goto leave;
+ }
+ reverse_buffer (buffer, buflen);
+ if ((err = gcry_mpi_scan (&mpi_x, GCRYMPI_FMT_USG, buffer, buflen, NULL)))
+ {
+ fail ("error scanning MPI for test %d, %s: %s",
+ testno, "x", gpg_strerror (err));
+ goto leave;
+ }
+
+ xfree (buffer);
+ buffer = NULL;
+
+ P = gcry_mpi_point_set (NULL, mpi_x, NULL, GCRYMPI_CONST_ONE);
+
+ mpi_k = gcry_mpi_copy (mpi_x);
+ if (debug)
+ print_mpi ("k", mpi_k);
+
+ for (i = 0; i < iter; i++)
+ {
+ /*
+ * Another variant of decodeScalar25519 thing.
+ */
+ mpi_kk = gcry_mpi_set (mpi_kk, mpi_k);
+ gcry_mpi_set_bit (mpi_kk, 254);
+ gcry_mpi_clear_bit (mpi_kk, 255);
+ gcry_mpi_clear_bit (mpi_kk, 0);
+ gcry_mpi_clear_bit (mpi_kk, 1);
+ gcry_mpi_clear_bit (mpi_kk, 2);
+
+ gcry_mpi_ec_mul (Q, mpi_kk, P, ctx);
+
+ P = gcry_mpi_point_set (P, mpi_k, NULL, GCRYMPI_CONST_ONE);
+ gcry_mpi_ec_get_affine (mpi_k, NULL, Q, ctx);
+
+ if (debug)
+ print_mpi ("k", mpi_k);
+ }
+
+ {
+ unsigned char res[32];
+ char *r, *r0;
+
+ gcry_mpi_print (GCRYMPI_FMT_USG, res, 32, NULL, mpi_k);
+ reverse_buffer (res, 32);
+
+ r0 = r = xmalloc (65);
+ if (!r0)
+ {
+ fail ("memory allocation for test %d", testno);
+ goto leave;
+ }
+
+ for (i=0; i < 32; i++, r += 2)
+ snprintf (r, 3, "%02x", res[i]);
+
+ if (strcmp (result_str, r0))
+ {
+ fail ("curv25519 failed for test %d: %s",
+ testno, "wrong value returned");
+ info (" expected: '%s'", result_str);
+ info (" got: '%s'", r0);
+ }
+ xfree (r0);
+ }
+
+ leave:
+ gcry_mpi_release (mpi_kk);
+ gcry_mpi_release (mpi_k);
+ gcry_mpi_point_release (P);
+ gcry_mpi_release (mpi_x);
+ xfree (buffer);
+ gcry_mpi_point_release (Q);
+ gcry_ctx_release (ctx);
+}
+
+/*
+ * X-coordinate of generator of the Curve25519.
+ */
+#define G_X "0900000000000000000000000000000000000000000000000000000000000000"
+
+/*
+ * Test Diffie-Hellman in RFC-7748.
+ *
+ * Note that it's not like the ECDH of OpenPGP, where we use
+ * ephemeral public key.
+ */
+static void
+test_dh (int testno, const char *a_priv_str, const char *a_pub_str,
+ const char *b_priv_str, const char *b_pub_str,
+ const char *result_str)
+{
+ /* Test A for private key corresponds to public key. */
+ test_cv (testno, a_priv_str, G_X, a_pub_str);
+ /* Test B for private key corresponds to public key. */
+ test_cv (testno, b_priv_str, G_X, b_pub_str);
+ /* Test DH with A's private key and B's public key. */
+ test_cv (testno, a_priv_str, b_pub_str, result_str);
+ /* Test DH with B's private key and A's public key. */
+ test_cv (testno, b_priv_str, a_pub_str, result_str);
+}
+
+
+static void
+check_cv25519 (void)
+{
+ int ntests;
+
+ info ("Checking Curve25519.\n");
+
+ ntests = 0;
+
+ /*
+ * Values are cited from RFC-7748: 5.2. Test Vectors.
+ * Following two tests are for the first type test.
+ */
+ test_cv (1,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "e6db6867583030db3594c1a424b15f7c726624ec26b3353b10a903a6d0ab1c4c",
+ "c3da55379de9c6908e94ea4df28d084f32eccf03491c71f754b4075577a28552");
+ ntests++;
+ test_cv (2,
+ "4b66e9d4d1b4673c5ad22691957d6af5c11b6421e0ea01d42ca4169e7918ba0d",
+ "e5210f12786811d3f4b7959d0538ae2c31dbe7106fc03c3efc4cd549c715a493",
+ "95cbde9476e8907d7aade45cb4b873f88b595a68799fa152e6f8f7647aac7957");
+ ntests++;
+
+ /*
+ * Additional test. Value is from second type test.
+ */
+ test_cv (3,
+ G_X,
+ G_X,
+ "422c8e7a6227d7bca1350b3e2bb7279f7897b87bb6854b783c60e80311ae3079");
+ ntests++;
+
+ /*
+ * Following two tests are for the second type test,
+ * with one iteration and 1,000 iterations. (1,000,000 iterations
+ * takes too long.)
+ */
+ test_it (4,
+ G_X,
+ 1,
+ "422c8e7a6227d7bca1350b3e2bb7279f7897b87bb6854b783c60e80311ae3079");
+ ntests++;
+
+ test_it (5,
+ G_X,
+ 1000,
+ "684cf59ba83309552800ef566f2f4d3c1c3887c49360e3875f2eb94d99532c51");
+ ntests++;
+
+ /*
+ * Last test is from: 6. Diffie-Hellman, 6.1. Curve25519
+ */
+ test_dh (6,
+ /* Alice's private key, a */
+ "77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a",
+ /* Alice's public key, X25519(a, 9) */
+ "8520f0098930a754748b7ddcb43ef75a0dbf3a0d26381af4eba4a98eaa9b4e6a",
+ /* Bob's private key, b */
+ "5dab087e624a8a4b79e17f8b83800ee66f3bb1292618b6fd1c2f8b27ff88e0eb",
+ /* Bob's public key, X25519(b, 9) */
+ "de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f",
+ /* Their shared secret, K */
+ "4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742");
+ ntests++;
+
+ /* Seven tests which results 0. */
+ test_cv (7,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "0000000000000000000000000000000000000000000000000000000000000000",
+ "0000000000000000000000000000000000000000000000000000000000000000");
+ ntests++;
+
+ test_cv (8,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "0100000000000000000000000000000000000000000000000000000000000000",
+ "0000000000000000000000000000000000000000000000000000000000000000");
+ ntests++;
+
+ test_cv (9,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "e0eb7a7c3b41b8ae1656e3faf19fc46ada098deb9c32b1fd866205165f49b800",
+ "0000000000000000000000000000000000000000000000000000000000000000");
+ ntests++;
+
+ test_cv (10,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "5f9c95bca3508c24b1d0b1559c83ef5b04445cc4581c8e86d8224eddd09f1157",
+ "0000000000000000000000000000000000000000000000000000000000000000");
+ ntests++;
+
+ test_cv (11,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "ecffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
+ "0000000000000000000000000000000000000000000000000000000000000000");
+ ntests++;
+
+ test_cv (12,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "edffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
+ "0000000000000000000000000000000000000000000000000000000000000000");
+ ntests++;
+
+ test_cv (13,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "eeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
+ "0000000000000000000000000000000000000000000000000000000000000000");
+ ntests++;
+
+ /* Five tests which resulted 0 if decodeUCoordinate didn't change MSB. */
+ test_cv (14,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "cdeb7a7c3b41b8ae1656e3faf19fc46ada098deb9c32b1fd866205165f49b880",
+ "7ce548bc4919008436244d2da7a9906528fe3a6d278047654bd32d8acde9707b");
+ ntests++;
+
+ test_cv (15,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "4c9c95bca3508c24b1d0b1559c83ef5b04445cc4581c8e86d8224eddd09f11d7",
+ "e17902e989a034acdf7248260e2c94cdaf2fe1e72aaac7024a128058b6189939");
+ ntests++;
+
+ test_cv (16,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "d9ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+ "ea6e6ddf0685c31e152d5818441ac9ac8db1a01f3d6cb5041b07443a901e7145");
+ ntests++;
+
+ test_cv (17,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "daffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+ "845ddce7b3a9b3ee01a2f1fd4282ad293310f7a232cbc5459fb35d94bccc9d05");
+ ntests++;
+
+ test_cv (18,
+ "a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4",
+ "dbffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+ "6989e2cb1cea159acf121b0af6bf77493189c9bd32c2dac71669b540f9488247");
+ ntests++;
+
+ if (ntests != N_TESTS)
+ fail ("did %d tests but expected %d", ntests, N_TESTS);
+ else if ((ntests % 256))
+ show_note ("%d tests done\n", ntests);
+}
+
+
+int
+main (int argc, char **argv)
+{
+ int last_argc = -1;
+
+ if (argc)
+ { argc--; argv++; }
+
+ while (argc && last_argc != argc )
+ {
+ last_argc = argc;
+ if (!strcmp (*argv, "--"))
+ {
+ argc--; argv++;
+ break;
+ }
+ else if (!strcmp (*argv, "--help"))
+ {
+ fputs ("usage: " PGM " [options]\n"
+ "Options:\n"
+ " --verbose print timings etc.\n"
+ " --debug flyswatter\n",
+ stdout);
+ exit (0);
+ }
+ else if (!strcmp (*argv, "--verbose"))
+ {
+ verbose++;
+ argc--; argv++;
+ }
+ else if (!strcmp (*argv, "--debug"))
+ {
+ verbose += 2;
+ debug++;
+ argc--; argv++;
+ }
+ else if (!strncmp (*argv, "--", 2))
+ die ("unknown option '%s'", *argv);
+ }
+
+ xgcry_control ((GCRYCTL_DISABLE_SECMEM, 0));
+ if (!gcry_check_version (GCRYPT_VERSION))
+ die ("version mismatch\n");
+ if (debug)
+ xgcry_control ((GCRYCTL_SET_DEBUG_FLAGS, 1u , 0));
+ xgcry_control ((GCRYCTL_ENABLE_QUICK_RANDOM, 0));
+ xgcry_control ((GCRYCTL_INITIALIZATION_FINISHED, 0));
+
+ start_timer ();
+ check_cv25519 ();
+ stop_timer ();
+
+ info ("All tests completed in %s. Errors: %d\n",
+ elapsed_time (1), error_count);
+ return !!error_count;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-13 08:34:30 +0000