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49 lines
1.9 KiB
49 lines
1.9 KiB
From 0d873f9f647764df147d818a6e998b1c318bac31 Mon Sep 17 00:00:00 2001 |
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From: Clemens Lang <cllang@redhat.com> |
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Date: Mon, 16 Oct 2023 15:30:26 +0200 |
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Subject: [PATCH] rsa: Add SP800-56Br2 6.4.1.2.1 (3.c) check |
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The code did not yet check that the length of the RSA key is positive |
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and even. |
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Signed-off-by: Clemens Lang <cllang@redhat.com> |
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Upstream-Status: Backport [8b268541d9aabee51699aef22963407362830ef9] |
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--- |
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crypto/rsa/rsa_sp800_56b_check.c | 5 +++++ |
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test/rsa_sp800_56b_test.c | 4 ++++ |
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2 files changed, 9 insertions(+) |
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diff --git a/crypto/rsa/rsa_sp800_56b_check.c b/crypto/rsa/rsa_sp800_56b_check.c |
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index fc8f19b487..e6b79e953d 100644 |
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--- a/crypto/rsa/rsa_sp800_56b_check.c |
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+++ b/crypto/rsa/rsa_sp800_56b_check.c |
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@@ -403,6 +403,11 @@ int ossl_rsa_sp800_56b_check_keypair(const RSA *rsa, const BIGNUM *efixed, |
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ERR_raise(ERR_LIB_RSA, RSA_R_INVALID_KEYPAIR); |
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return 0; |
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} |
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+ /* (Step 3.c): check that the modulus length is a positive even integer */ |
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+ if (nbits <= 0 || (nbits & 0x1)) { |
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+ ERR_raise(ERR_LIB_RSA, RSA_R_INVALID_KEYPAIR); |
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+ return 0; |
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+ } |
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ctx = BN_CTX_new_ex(rsa->libctx); |
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if (ctx == NULL) |
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diff --git a/test/rsa_sp800_56b_test.c b/test/rsa_sp800_56b_test.c |
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index 7660019f47..aa58bbbe6c 100644 |
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--- a/test/rsa_sp800_56b_test.c |
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+++ b/test/rsa_sp800_56b_test.c |
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@@ -458,6 +458,10 @@ static int test_invalid_keypair(void) |
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&& TEST_true(BN_add_word(n, 1)) |
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&& TEST_false(ossl_rsa_sp800_56b_check_keypair(key, NULL, -1, 2048)) |
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&& TEST_true(BN_sub_word(n, 1)) |
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+ /* check that validation fails if len(n) is not even */ |
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+ && TEST_true(BN_lshift1(n, n)) |
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+ && TEST_false(ossl_rsa_sp800_56b_check_keypair(key, NULL, -1, 2049)) |
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+ && TEST_true(BN_rshift1(n, n)) |
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/* check p */ |
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&& TEST_true(BN_sub_word(p, 2)) |
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&& TEST_true(BN_mul(n, p, q, ctx)) |
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-- |
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2.41.0 |
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