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openSUSE:Leap:15.5:Update
libgcrypt.25788
libgcrypt-FIPS-fix-gcry_mpi_sub_ui.patch
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File libgcrypt-FIPS-fix-gcry_mpi_sub_ui.patch of Package libgcrypt.25788
From d5bf106468e6c6b0f33b193abf04590e4e9fc011 Mon Sep 17 00:00:00 2001 From: Jussi Kivilinna <jussi.kivilinna@iki.fi> Date: Tue, 30 Nov 2021 22:04:16 +0200 Subject: [PATCH 487/500] gcry_mpi_sub_ui: fix subtracting from negative value * mpi/mpi-add.c (_gcry_mpi_sub_ui): Set output sign bit when 'u' is negative. * tests/mpitests.c (test_add): Additional tests for mpi_add_ui; Check test output and fail if output does not match expected. (test_sub): Additional tests for mpi_sub_ui; Check test output and fail if output does not match expected. (test_mul): Additional tests for mpi_mul_ui; Check test output and fail if output does not match expected. -- Reported-by: Guido Vranken <guidovranken@gmail.com> Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi> --- mpi/mpi-add.c | 1 + tests/mpitests.c | 119 ++++++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 113 insertions(+), 7 deletions(-) diff --git a/mpi/mpi-add.c b/mpi/mpi-add.c index 53f476e0..38dd352f 100644 --- a/mpi/mpi-add.c +++ b/mpi/mpi-add.c @@ -191,6 +191,7 @@ _gcry_mpi_sub_ui(gcry_mpi_t w, gcry_mpi_t u, unsigned long v ) cy = _gcry_mpih_add_1(wp, up, usize, v); wp[usize] = cy; wsize = usize + cy; + wsign = 1; } else { /* The signs are different. Need exact comparison to determine * which operand to subtract from which. */ diff --git a/tests/mpitests.c b/tests/mpitests.c index 96e01551..48ea18b2 100644 --- a/tests/mpitests.c +++ b/tests/mpitests.c @@ -378,7 +378,8 @@ test_add (void) gcry_mpi_t two; gcry_mpi_t ff; gcry_mpi_t result; - unsigned char* pc; + gcry_mpi_t minusfive; + char *pc; gcry_mpi_scan(&one, GCRYMPI_FMT_USG, ones, sizeof(ones), NULL); gcry_mpi_scan(&two, GCRYMPI_FMT_USG, twos, sizeof(twos), NULL); @@ -386,21 +387,47 @@ test_add (void) result = gcry_mpi_new(0); gcry_mpi_add(result, one, two); - gcry_mpi_aprint(GCRYMPI_FMT_HEX, &pc, NULL, result); + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); if (debug) gcry_log_debug ("Result of one plus two:\n%s\n", pc); + if (strcmp (pc, "030303030303030303030303030303030303030303030303" + "030303030303030303030303030303030303030303030303") != 0) + fail ("mpi_add failed at line %d", __LINE__); gcry_free(pc); gcry_mpi_add(result, ff, one); - gcry_mpi_aprint(GCRYMPI_FMT_HEX, &pc, NULL, result); + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); if (debug) gcry_log_debug ("Result of ff plus one:\n%s\n", pc); + if (strcmp (pc, "010101010101010101010101010101010101010101010101" + "01010101010101010101010101010101010101010101010100") != 0) + fail ("mpi_add failed at line %d", __LINE__); + gcry_free(pc); + + gcry_mpi_scan(&minusfive, GCRYMPI_FMT_HEX, "-5", 0, NULL); + gcry_mpi_add_ui (result, minusfive, 2); + + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); + if (debug) + gcry_log_debug ("Result of minus five plus two:\n%s\n", pc); + if (strcmp (pc, "-03") != 0) + fail ("mpi_add_ui failed at line %d", __LINE__); + gcry_free(pc); + + gcry_mpi_add_ui (result, result, 3); + + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); + if (debug) + gcry_log_debug ("Result of minus three plus three:\n%s\n", pc); + if (strcmp (pc, "00") != 0) + fail ("mpi_add_ui failed at line %d", __LINE__); gcry_free(pc); gcry_mpi_release(one); gcry_mpi_release(two); gcry_mpi_release(ff); gcry_mpi_release(result); + gcry_mpi_release(minusfive); return 1; } @@ -408,24 +435,76 @@ test_add (void) static int test_sub (void) { + gcry_mpi_t zero; gcry_mpi_t one; gcry_mpi_t two; + gcry_mpi_t five; gcry_mpi_t result; - unsigned char* pc; + gcry_mpi_t minusfive; + char *pc; gcry_mpi_scan(&one, GCRYMPI_FMT_USG, ones, sizeof(ones), NULL); gcry_mpi_scan(&two, GCRYMPI_FMT_USG, twos, sizeof(twos), NULL); result = gcry_mpi_new(0); gcry_mpi_sub(result, two, one); - gcry_mpi_aprint(GCRYMPI_FMT_HEX, &pc, NULL, result); + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); if (debug) gcry_log_debug ("Result of two minus one:\n%s\n", pc); + if (strcmp (pc, "010101010101010101010101010101010101010101010101" + "010101010101010101010101010101010101010101010101") != 0) + fail ("mpi_sub failed at line %d", __LINE__); + gcry_free(pc); + + zero = gcry_mpi_new(0); + five = gcry_mpi_new(0); + minusfive = gcry_mpi_new(0); + gcry_mpi_set_ui (zero, 0); + gcry_mpi_set_ui (one, 1); + gcry_mpi_set_ui (two, 2); + gcry_mpi_set_ui (five, 5); + gcry_mpi_sub (minusfive, zero, five); + + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, minusfive); + if (debug) + gcry_log_debug ("Result of zero minus five:\n%s\n", pc); + if (strcmp (pc, "-05") != 0) + fail ("mpi_sub failed at line %d", __LINE__); + gcry_free(pc); + + gcry_mpi_sub_ui (result, five, 2); + + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); + if (debug) + gcry_log_debug ("Result of five minus two:\n%s\n", pc); + if (strcmp (pc, "03") != 0) + fail ("mpi_sub_ui failed at line %d", __LINE__); + gcry_free(pc); + + gcry_mpi_sub_ui (result, one, 10); + + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); + if (debug) + gcry_log_debug ("Result of one minus ten:\n%s\n", pc); + if (strcmp (pc, "-09") != 0) + fail ("mpi_sub_ui failed at line %d", __LINE__); + gcry_free(pc); + + gcry_mpi_sub_ui (result, minusfive, 2); + + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); + if (debug) + gcry_log_debug ("Result of minus five minus two:\n%s\n", pc); + if (strcmp (pc, "-07") != 0) + fail ("mpi_sub_ui failed at line %d", __LINE__); gcry_free(pc); gcry_mpi_release(one); gcry_mpi_release(two); gcry_mpi_release(result); + gcry_mpi_release(zero); + gcry_mpi_release(five); + gcry_mpi_release(minusfive); return 1; } @@ -436,21 +515,47 @@ test_mul (void) gcry_mpi_t two; gcry_mpi_t three; gcry_mpi_t result; - unsigned char* pc; + gcry_mpi_t minusfive; + char *pc; gcry_mpi_scan(&two, GCRYMPI_FMT_USG, twos, sizeof(twos), NULL); gcry_mpi_scan(&three, GCRYMPI_FMT_USG, threes, sizeof(threes), NULL); result = gcry_mpi_new(0); gcry_mpi_mul(result, two, three); - gcry_mpi_aprint(GCRYMPI_FMT_HEX, &pc, NULL, result); + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); if (debug) gcry_log_debug ("Result of two mul three:\n%s\n", pc); + if (strcmp (pc, "060C12181E242A30363C42484E545A60666C72787E848A90" + "969CA2A8AEB4BAC0C6CCD2D8DEE4EAF0F6FD03090F151B21" + "1B150F0902FCF6F0EAE4DED8D2CCC6C0BAB4AEA8A29C9690" + "8A847E78726C66605A544E48423C36302A241E18120C06") != 0) + fail ("mpi_mul failed at line %d", __LINE__); + gcry_free(pc); + + gcry_mpi_scan(&minusfive, GCRYMPI_FMT_HEX, "-5", 0, NULL); + gcry_mpi_mul_ui (result, minusfive, 3); + + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); + if (debug) + gcry_log_debug ("Result of minus five mul three:\n%s\n", pc); + if (strcmp (pc, "-0F") != 0) + fail ("mpi_mul_ui failed at line %d", __LINE__); + gcry_free(pc); + + gcry_mpi_mul_ui (result, result, 0); + + gcry_mpi_aprint(GCRYMPI_FMT_HEX, (unsigned char **)&pc, NULL, result); + if (debug) + gcry_log_debug ("Result of minus fifteen mul zero:\n%s\n", pc); + if (strcmp (pc, "00") != 0) + fail ("mpi_mul_ui failed at line %d", __LINE__); gcry_free(pc); gcry_mpi_release(two); gcry_mpi_release(three); gcry_mpi_release(result); + gcry_mpi_release(minusfive); return 1; } -- 2.33.1
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