diff -up openssl-3.0.1/providers/implementations/kem/rsa_kem.c.encap openssl-3.0.1/providers/implementations/kem/rsa_kem.c

--- openssl-3.0.1/providers/implementations/kem/rsa_kem.c.encap	2022-11-22 12:27:30.994530801 +0100

+++ openssl-3.0.1/providers/implementations/kem/rsa_kem.c	2022-11-22 12:32:15.916875495 +0100

@@ -264,6 +264,14 @@ static int rsasve_generate(PROV_RSA_CTX

             *secretlen = nlen;

         return 1;

     }

+

+#ifdef FIPS_MODULE

+    if (nlen < OPENSSL_RSA_FIPS_MIN_MODULUS_BITS/8) {

+        ERR_raise(ERR_LIB_PROV, PROV_R_KEY_SIZE_TOO_SMALL);

+        return 0;

+    }

+#endif

+

     /*

      * Step (2): Generate a random byte string z of nlen bytes where

      *            1 < z < n - 1

@@ -307,6 +315,13 @@ static int rsasve_recover(PROV_RSA_CTX *

         return 1;

     }

+#ifdef FIPS_MODULE

+    if (nlen < OPENSSL_RSA_FIPS_MIN_MODULUS_BITS/8) {

+        ERR_raise(ERR_LIB_PROV, PROV_R_KEY_SIZE_TOO_SMALL);

+        return 0;

+    }

+#endif

+

     /* Step (2): check the input ciphertext 'inlen' matches the nlen */

     if (inlen != nlen) {

         ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);