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In FIPS mode limit key sizes for signature verification

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Resolves: rhbz#2077884
This commit is contained in:
Dmitry Belyavskiy 2022-05-23 15:25:42 +02:00
parent 7bc4f9f094
commit b5de6bd830
2 changed files with 27 additions and 0 deletions
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23
0045-FIPS-services-minimize.patch
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@ -694,3 +694,26 @@ diff -up openssl-3.0.1/ssl/ssl_ciph.c.nokrsa openssl-3.0.1/ssl/ssl_ciph.c
/*
* We ignore any errors from the fetches below. They are expected to fail
* if theose algorithms are not available.
diff -up openssl-3.0.1/providers/implementations/signature/rsa_sig.c.fipskeylen openssl-3.0.1/providers/implementations/signature/rsa_sig.c
--- openssl-3.0.1/providers/implementations/signature/rsa_sig.c.fipskeylen 2022-05-23 14:58:07.764281242 +0200
+++ openssl-3.0.1/providers/implementations/signature/rsa_sig.c 2022-05-23 15:10:29.327993616 +0200
@@ -770,6 +770,19 @@ static int rsa_verify(void *vprsactx, co
{
PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
size_t rslen;
+# ifdef FIPS_MODULE
+ size_t rsabits = RSA_bits(prsactx->rsa);
+
+ if (rsabits < 2048) {
+ if (rsabits != 1024
+ && rsabits != 1280
+ && rsabits != 1536
+ && rsabits != 1792) {
+ ERR_raise(ERR_LIB_FIPS, PROV_R_INVALID_KEY_LENGTH);
+ return 0;
+ }
+ }
+# endif
if (!ossl_prov_is_running())
return 0;

4
openssl.spec
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@ -454,6 +454,10 @@ install -m644 %{SOURCE9} \
- Resolves: rhbz#2083240
- Ciphersuites with RSA KX should be filterd in FIPS mode
- Related: rhbz#2085088
- In FIPS mode, signature verification works with keys of arbitrary size
above 2048 bit, and only with 1024, 1280, 1536, 1792 bits for keys
below 2048 bits
- Resolves: rhbz#2077884
* Wed May 18 2022 Clemens Lang <cllang@redhat.com> - 1:3.0.1-31
- Disable SHA-1 signature verification in FIPS mode