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Merge pull request #4789 from SparkiDev/sp_invmod_oob 

SP int: sp_modinv fixes for sizes
pull/4794/head
David Garske 2022-01-24 09:08:08 -08:00 committed by GitHub
parent 93404361ff 3d63e41653
commit dee66cfe9e
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 4498 additions and 4466 deletions
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8933
wolfcrypt/src/sp_int.c
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31
wolfcrypt/test/test.c
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@ -36889,11 +36889,30 @@ static int mp_test_invmod(mp_int* a, mp_int* m, mp_int* r)
if (ret != MP_OKAY)
return -13177;
#if defined(WOLFSSL_SP_MATH) || defined(WOLFSSL_SP_MATH_ALL)
/* Maximum 'a' */
mp_set(a, 0);
mp_set_bit(a, (r->size / 2)* SP_WORD_SIZE - 1);
mp_sub_d(a, 1, a);
/* Modulus too big. */
mp_set(m, 0);
mp_set_bit(m, (r->size / 2) * SP_WORD_SIZE);
ret = mp_invmod(a, m, r);
if (ret != MP_VAL)
return -13178;
/* Maximum modulus - even. */
mp_set(m, 0);
mp_set_bit(m, (r->size / 2) * SP_WORD_SIZE - 1);
ret = mp_invmod(a, m, r);
if (ret != MP_OKAY)
return -13179;
#endif
#if !defined(WOLFSSL_SP_MATH) || defined(WOLFSSL_SP_INT_NEGATIVE)
mp_read_radix(a, "-3", 16);
ret = mp_invmod(a, m, r);
if (ret != MP_OKAY)
return -13178;
return -13180;
#endif
#if defined(WOLFSSL_SP_MATH_ALL) && defined(HAVE_ECC)
@ -36901,28 +36920,28 @@ static int mp_test_invmod(mp_int* a, mp_int* m, mp_int* r)
mp_set(m, 3);
ret = mp_invmod_mont_ct(a, m, r, 1);
if (ret != MP_VAL)
return -13179;
return -13190;
mp_set(a, 1);
mp_set(m, 0);
ret = mp_invmod_mont_ct(a, m, r, 1);
if (ret != MP_VAL)
return -13180;
return -13191;
mp_set(a, 1);
mp_set(m, 1);
ret = mp_invmod_mont_ct(a, m, r, 1);
if (ret != MP_VAL)
return -13181;
return -13192;
mp_set(a, 1);
mp_set(m, 2);
ret = mp_invmod_mont_ct(a, m, r, 1);
if (ret != MP_VAL)
return -13182;
return -13193;
mp_set(a, 1);
mp_set(m, 3);
ret = mp_invmod_mont_ct(a, m, r, 1);
if (ret != MP_OKAY)
return -13183;
return -13194;
#endif
return 0;