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SUSE:SLE-15:Update
openssl-1_1.13606
openssl-rsakeygen-minimum-distance.patch
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File openssl-rsakeygen-minimum-distance.patch of Package openssl-1_1.13606
Index: openssl-1.1.0h/crypto/rsa/rsa_gen.c =================================================================== --- openssl-1.1.0h.orig/crypto/rsa/rsa_gen.c 2018-03-27 16:34:44.709128590 +0200 +++ openssl-1.1.0h/crypto/rsa/rsa_gen.c 2018-03-27 16:34:44.753129312 +0200 @@ -420,6 +420,19 @@ static int rsa_builtin_keygen(RSA *rsa, bitsp = (bits + 1) / 2; bitsq = bits - bitsp; + /* prepare a maximum for p and q */ + /* 0xB504F334 is (sqrt(2)/2)*2^32 */ + if (!BN_set_word(r0, 0xB504F334)) + goto err; + if (!BN_lshift(r0, r0, bitsp - 32)) + goto err; + + /* prepare minimum p and q difference */ + if (!BN_one(r3)) + goto err; + if (!BN_lshift(r3, r3, bitsp - 100)) + goto err; + /* We need the RSA components non-NULL */ if (!rsa->n && ((rsa->n = BN_new()) == NULL)) goto err; @@ -446,6 +459,8 @@ static int rsa_builtin_keygen(RSA *rsa, for (;;) { if (!BN_generate_prime_ex(rsa->p, bitsp, 0, NULL, NULL, cb)) goto err; + if (BN_cmp(rsa->p, r0) < 0) + continue; if (!BN_sub(r2, rsa->p, BN_value_one())) goto err; ERR_set_mark(); @@ -471,6 +486,13 @@ static int rsa_builtin_keygen(RSA *rsa, if (!BN_generate_prime_ex(rsa->q, bitsq, 0, NULL, NULL, cb)) goto err; } while (BN_cmp(rsa->p, rsa->q) == 0); + if (BN_cmp(rsa->q, r0) < 0) + continue; + /* check for minimum distance between p and q, 2^(bitsp-100) */ + if (!BN_sub(r2, rsa->q, rsa->p)) + goto err; + if (BN_ucmp(r2, r3) <= 0) + continue; if (!BN_sub(r2, rsa->q, BN_value_one())) goto err; ERR_set_mark();
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