remove sanity check from ossl_rsa_todata

Theres no reason we should gate ossl_rsa_todata on there being a minimum
set of parameters. EVP_PKEY_todata makes no guarantees about the
validity of a key, it only returns the parameters that are set in the
requested key, whatever they may be.  Remove the check.

Fixes #21935

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22334)

diff --git a/crypto/rsa/rsa_backend.c b/crypto/rsa/rsa_backend.c
index c416d4bf61310150681fa911019ba1a3fb582990..7b2efa88620fadae9feadcbce106c5636eb269db 100644 (file)
--- a/crypto/rsa/rsa_backend.c
+++ b/crypto/rsa/rsa_backend.c
@@ -141,18 +141,6 @@ int ossl_rsa_todata(RSA *rsa, OSSL_PARAM_BLD *bld, OSSL_PARAM params[],
 
     /* Check private key data integrity */
     if (include_private && rsa_d != NULL) {
-        int numprimes = sk_BIGNUM_const_num(factors);
-        int numexps = sk_BIGNUM_const_num(exps);
-        int numcoeffs = sk_BIGNUM_const_num(coeffs);
-
-        /*
-         * It's permissible to have zero primes, i.e. no CRT params.
-         * Otherwise, there must be at least two, as many exponents,
-         * and one coefficient less.
-         */
-        if (numprimes != 0
-            && (numprimes < 2 || numexps < 2 || numcoeffs < 1))
-            goto err;
 
         if (!ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_RSA_D,
                                      rsa_d)