diff -up a/CryptoPkg/Library/OpensslLib/openssl/crypto/rsa/rsa_gen.c.cc-reqs b/CryptoPkg/Library/OpensslLib/openssl/crypto/rsa/rsa_gen.c

--- a/CryptoPkg/Library/OpensslLib/openssl/crypto/rsa/rsa_gen.c.cc-reqs	2017-01-26 14:10:23.000000000 +0100

+++ b/CryptoPkg/Library/OpensslLib/openssl/crypto/rsa/rsa_gen.c	2017-01-26 16:01:52.622308528 +0100

@@ -75,6 +75,12 @@ static int rsa_builtin_keygen(RSA *rsa,

     if (!rsa->iqmp && ((rsa->iqmp = BN_secure_new()) == NULL))

         goto err;

+    /* prepare minimum p and q difference */

+    if (!BN_one(r3))

+        goto err;

+    if (bitsp > 100 && !BN_lshift(r3, r3, bitsp - 100))

+        goto err;

+

     if (BN_copy(rsa->e, e_value) == NULL)

         goto err;

@@ -103,7 +109,9 @@ static int rsa_builtin_keygen(RSA *rsa,

         do {

             if (!BN_generate_prime_ex(rsa->q, bitsq, 0, NULL, NULL, cb))

                 goto err;

-        } while ((BN_cmp(rsa->p, rsa->q) == 0) && (++degenerate < 3));

+            if (!BN_sub(r2, rsa->q, rsa->p))

+                goto err;

+        } while ((BN_ucmp(r2, r3) <= 0) && (++degenerate < 3));

         if (degenerate == 3) {

             ok = 0;             /* we set our own err */

             RSAerr(RSA_F_RSA_BUILTIN_KEYGEN, RSA_R_KEY_SIZE_TOO_SMALL);