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-rw-r--r--crypto/ecdh.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/crypto/ecdh.c b/crypto/ecdh.c
index ed1464a..4aa0b0c 100644
--- a/crypto/ecdh.c
+++ b/crypto/ecdh.c
@@ -104,13 +104,12 @@ static int ecdh_compute_value(struct kpp_request *req)
return ret;
}
-static int ecdh_max_size(struct crypto_kpp *tfm)
+static unsigned int ecdh_max_size(struct crypto_kpp *tfm)
{
struct ecdh_ctx *ctx = ecdh_get_ctx(tfm);
- int nbytes = ctx->ndigits << ECC_DIGITS_TO_BYTES_SHIFT;
- /* Public key is made of two coordinates */
- return 2 * nbytes;
+ /* Public key is made of two coordinates, add one to the left shift */
+ return ctx->ndigits << (ECC_DIGITS_TO_BYTES_SHIFT + 1);
}
static void no_exit_tfm(struct crypto_kpp *tfm)
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