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From 000b230258dd272ab15b384c330c31f996d0ba18 Mon Sep 17 00:00:00 2001
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From: Daiki Ueno <dueno@redhat.com>
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Date: Fri, 14 Apr 2023 14:10:47 +0900
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Subject: [PATCH] Ignore system crypto-policies for SHA-1 for legacy
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authby=rsa-sha1
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Signed-off-by: Daiki Ueno <dueno@redhat.com>
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---
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lib/libswan/pubkey_rsa.c | 24 ++++++++++++++++++++++++
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1 file changed, 24 insertions(+)
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diff --git a/lib/libswan/pubkey_rsa.c b/lib/libswan/pubkey_rsa.c
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index 38b44ab61d..9a7c0bc6a8 100644
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--- a/lib/libswan/pubkey_rsa.c
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+++ b/lib/libswan/pubkey_rsa.c
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@@ -501,9 +501,33 @@ static struct hash_signature RSA_sign_hash_pkcs1_1_5_rsa(const struct secret_stu
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* used to generate the signature.
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*/
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SECItem signature_result = {0};
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+
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+ /* ignore system crypto-policies for the hash algorithm */
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+ PRUint32 saved_policy;
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+
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+ if (NSS_GetAlgorithmPolicy(hash_algo->nss.oid_tag, &saved_policy) != SECSuccess) {
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+ /* PR_GetError() returns the thread-local error */
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+ enum_buf tb;
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+ llog_nss_error(RC_LOG_SERIOUS, logger,
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+ "NSS_SetAlgorithmPolicy(%s) function failed",
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+ str_nss_oid(hash_algo->nss.oid_tag, &tb);;
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+ return (struct hash_signature) { .len = 0, };
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+ }
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+
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+ if (!(saved_policy & NSS_USE_ALG_IN_SIGNATURE)) {
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+ (void)NSS_SetAlgorithmPolicy(hash_algo->nss.oid_tag,
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+ NSS_USE_ALG_IN_SIGNATURE, 0);
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+ }
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+
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SECStatus s = SGN_Digest(pks->u.pubkey.private_key,
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hash_algo->nss.oid_tag,
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&signature_result, &digest);
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+
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+ if (!(saved_policy & NSS_USE_ALG_IN_SIGNATURE)) {
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+ (void)NSS_SetAlgorithmPolicy(hash_algo->nss.oid_tag,
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+ saved_policy, ~saved_policy);
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+ }
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+
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if (s != SECSuccess) {
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/* PR_GetError() returns the thread-local error */
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enum_buf tb;
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--
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2.40.0
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