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58 lines
1.8 KiB
58 lines
1.8 KiB
8 months ago
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diff --git a/crypto/dh/dh_check.c b/crypto/dh/dh_check.c
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index aef6f9b1b7..fbe2797569 100644
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--- a/crypto/dh/dh_check.c
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+++ b/crypto/dh/dh_check.c
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@@ -143,7 +143,7 @@ int DH_check(const DH *dh, int *ret)
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#ifdef FIPS_MODULE
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return DH_check_params(dh, ret);
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#else
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- int ok = 0, r;
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+ int ok = 0, r, q_good = 0;
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BN_CTX *ctx = NULL;
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BIGNUM *t1 = NULL, *t2 = NULL;
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int nid = DH_get_nid((DH *)dh);
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@@ -172,6 +172,13 @@ int DH_check(const DH *dh, int *ret)
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goto err;
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if (dh->params.q != NULL) {
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+ if (BN_ucmp(dh->params.p, dh->params.q) > 0)
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+ q_good = 1;
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+ else
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+ *ret |= DH_CHECK_INVALID_Q_VALUE;
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+ }
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+
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+ if (q_good) {
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if (BN_cmp(dh->params.g, BN_value_one()) <= 0)
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*ret |= DH_NOT_SUITABLE_GENERATOR;
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else if (BN_cmp(dh->params.g, dh->params.p) >= 0)
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diff --git a/test/dhtest.c b/test/dhtest.c
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index f8dd8f3aa7..d02b3b7c58 100644
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--- a/test/dhtest.c
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+++ b/test/dhtest.c
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@@ -124,6 +124,15 @@ static int dh_test(void)
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/* We'll have a stale error on the queue from the above test so clear it */
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ERR_clear_error();
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+ if (!TEST_ptr(BN_copy(q, p)) || !TEST_true(BN_add(q, q, BN_value_one())))
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+ goto err3;
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+
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+ if (!TEST_true(DH_check(dh, &i)))
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+ goto err3;
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+ if (!TEST_true(i & DH_CHECK_INVALID_Q_VALUE)
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+ || !TEST_false(i & DH_CHECK_Q_NOT_PRIME))
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+ goto err3;
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+
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/* Modulus of size: dh check max modulus bits + 1 */
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if (!TEST_true(BN_set_word(p, 1))
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|| !TEST_true(BN_lshift(p, p, OPENSSL_DH_CHECK_MAX_MODULUS_BITS)))
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@@ -135,6 +144,9 @@ static int dh_test(void)
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if (!TEST_false(DH_check(dh, &i)))
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goto err3;
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+ /* We'll have a stale error on the queue from the above test so clear it */
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+ ERR_clear_error();
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+
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/*
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* II) key generation
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*/
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