| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 109/599] crypto: rsa-pkcs1pad - only allow with rsa | Date | Tue, 5 Apr 2022 09:26:43 +0200 |
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From: Eric Biggers <ebiggers@google.com>
commit 9b30430ea356f237945e52f8a3a42158877bd5a9 upstream.
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> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- crypto/rsa-pkcs1pad.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/crypto/rsa-pkcs1pad.c +++ b/crypto/rsa-pkcs1pad.c @@ -621,6 +621,11 @@ static int pkcs1pad_create(struct crypto 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)) {
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