The RSASSA-PSS signature scheme requires knowing the RSA modulus size
in bits. The rsa akcipher_alg max_size call is insufficient for this,
as the returned keysize is rounded up to the next byte.
Since the RSA modulus is stored as an MPI accessible via
struct rsa_mpi_key, move the struct definition to rsa.h to help RSA
sub-implementations query the MPI values.
Signed-off-by: Varad Gautam <varad.gautam@xxxxxxxx>
---
crypto/rsa.c | 6 ------
include/crypto/internal/rsa.h | 7 +++++++
2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/crypto/rsa.c b/crypto/rsa.c
index 4cdbec95d077..5c4eece5b802 100644
--- a/crypto/rsa.c
+++ b/crypto/rsa.c
@@ -12,12 +12,6 @@
#include <crypto/akcipher.h>
#include <crypto/algapi.h>
-struct rsa_mpi_key {
- MPI n;
- MPI e;
- MPI d;
-};
-
/*
* RSAEP function [RFC3447 sec 5.1.1]
* c = m^e mod n;
diff --git a/include/crypto/internal/rsa.h b/include/crypto/internal/rsa.h
index e870133f4b77..e73c61f788e6 100644
--- a/include/crypto/internal/rsa.h
+++ b/include/crypto/internal/rsa.h
@@ -7,6 +7,7 @@
*/
#ifndef _RSA_HELPER_
#define _RSA_HELPER_
+#include <linux/mpi.h>
#include <linux/types.h>
/**
@@ -53,5 +54,11 @@ int rsa_parse_pub_key(struct rsa_key *rsa_key, const void *key,
int rsa_parse_priv_key(struct rsa_key *rsa_key, const void *key,
unsigned int key_len);
+struct rsa_mpi_key {
+ MPI n;
+ MPI e;
+ MPI d;
+};
+
extern struct crypto_template rsa_pkcs1pad_tmpl;
#endif
--
2.30.2
