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-rw-r--r--include/crypto/kpp.h15
1 files changed, 8 insertions, 7 deletions
diff --git a/include/crypto/kpp.h b/include/crypto/kpp.h
index ce8e1f79374b..2133d17b7156 100644
--- a/include/crypto/kpp.h
+++ b/include/crypto/kpp.h
@@ -53,7 +53,7 @@ struct crypto_kpp {
*
* @set_secret: Function invokes the protocol specific function to
* store the secret private key along with parameters.
- * The implementation knows how to decode thie buffer
+ * The implementation knows how to decode the buffer
* @generate_public_key: Function generate the public key to be sent to the
* counterpart. In case of error, where output is not big
* enough req->dst_len will be updated to the size
@@ -79,7 +79,7 @@ struct kpp_alg {
int (*generate_public_key)(struct kpp_request *req);
int (*compute_shared_secret)(struct kpp_request *req);
- int (*max_size)(struct crypto_kpp *tfm);
+ unsigned int (*max_size)(struct crypto_kpp *tfm);
int (*init)(struct crypto_kpp *tfm);
void (*exit)(struct crypto_kpp *tfm);
@@ -102,7 +102,7 @@ struct kpp_alg {
* @mask: specifies the mask for the algorithm
*
* Allocate a handle for kpp algorithm. The returned struct crypto_kpp
- * is requeried for any following API invocation
+ * is required for any following API invocation
*
* Return: allocated handle in case of success; IS_ERR() is true in case of
* an error, PTR_ERR() returns the error code.
@@ -323,13 +323,14 @@ static inline int crypto_kpp_compute_shared_secret(struct kpp_request *req)
/**
* crypto_kpp_maxsize() - Get len for output buffer
*
- * Function returns the output buffer size required
+ * Function returns the output buffer size required for a given key.
+ * Function assumes that the key is already set in the transformation. If this
+ * function is called without a setkey or with a failed setkey, you will end up
+ * in a NULL dereference.
*
* @tfm: KPP tfm handle allocated with crypto_alloc_kpp()
- *
- * Return: minimum len for output buffer or error code if key hasn't been set
*/
-static inline int crypto_kpp_maxsize(struct crypto_kpp *tfm)
+static inline unsigned int crypto_kpp_maxsize(struct crypto_kpp *tfm)
{
struct kpp_alg *alg = crypto_kpp_alg(tfm);