From: Eric Biggers ebiggers@google.com
The pkcs1pad template can be instantiated with an arbitrary akcipher algorithm, which doesn't make sense; it is specifically an RSA padding scheme. Make it check that the underlying algorithm really is RSA.
Fixes: 3d5b1ecdea6f ("crypto: rsa - RSA padding algorithm") Cc: stable@vger.kernel.org # v4.5+ Signed-off-by: Eric Biggers ebiggers@google.com --- crypto/rsa-pkcs1pad.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/crypto/rsa-pkcs1pad.c b/crypto/rsa-pkcs1pad.c index 8ac3e73e8ea65..1b35457814258 100644 --- a/crypto/rsa-pkcs1pad.c +++ b/crypto/rsa-pkcs1pad.c @@ -621,6 +621,11 @@ static int pkcs1pad_create(struct crypto_template *tmpl, struct rtattr **tb)
rsa_alg = crypto_spawn_akcipher_alg(&ctx->spawn);
+ if (strcmp(rsa_alg->base.cra_name, "rsa") != 0) { + err = -EINVAL; + goto err_free_inst; + } + err = -ENAMETOOLONG; hash_name = crypto_attr_alg_name(tb[2]); if (IS_ERR(hash_name)) {