crypto: rsa - Store rest of the private key components

When parsing a private key, store all non-optional fields. These
are required for enabling CRT mode for decrypt and verify

Signed-off-by: Salvatore Benedetto <salvatore.benedetto@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

2 files changed, 80 insertions, 5 deletions

diff --git a/crypto/rsa_helper.c b/crypto/rsa_helper.c
index 583656af4fe2..4df6451e7543 100644
--- a/crypto/rsa_helper.c
+++ b/crypto/rsa_helper.c
@@ -78,6 +78,81 @@ int rsa_get_d(void *context, size_t hdrlen, unsigned char tag,
 	return 0;
 }
 
+int rsa_get_p(void *context, size_t hdrlen, unsigned char tag,
+	      const void *value, size_t vlen)
+{
+	struct rsa_key *key = context;
+
+	/* invalid key provided */
+	if (!value || !vlen || vlen > key->n_sz)
+		return -EINVAL;
+
+	key->p = value;
+	key->p_sz = vlen;
+
+	return 0;
+}
+
+int rsa_get_q(void *context, size_t hdrlen, unsigned char tag,
+	      const void *value, size_t vlen)
+{
+	struct rsa_key *key = context;
+
+	/* invalid key provided */
+	if (!value || !vlen || vlen > key->n_sz)
+		return -EINVAL;
+
+	key->q = value;
+	key->q_sz = vlen;
+
+	return 0;
+}
+
+int rsa_get_dp(void *context, size_t hdrlen, unsigned char tag,
+	       const void *value, size_t vlen)
+{
+	struct rsa_key *key = context;
+
+	/* invalid key provided */
+	if (!value || !vlen || vlen > key->n_sz)
+		return -EINVAL;
+
+	key->dp = value;
+	key->dp_sz = vlen;
+
+	return 0;
+}
+
+int rsa_get_dq(void *context, size_t hdrlen, unsigned char tag,
+	       const void *value, size_t vlen)
+{
+	struct rsa_key *key = context;
+
+	/* invalid key provided */
+	if (!value || !vlen || vlen > key->n_sz)
+		return -EINVAL;
+
+	key->dq = value;
+	key->dq_sz = vlen;
+
+	return 0;
+}
+
+int rsa_get_qinv(void *context, size_t hdrlen, unsigned char tag,
+		 const void *value, size_t vlen)
+{
+	struct rsa_key *key = context;
+
+	/* invalid key provided */
+	if (!value || !vlen || vlen > key->n_sz)
+		return -EINVAL;
+
+	key->qinv = value;
+	key->qinv_sz = vlen;
+
+	return 0;
+}
+
 /**
  * rsa_parse_pub_key() - decodes the BER encoded buffer and stores in the
  *                       provided struct rsa_key, pointers to the raw key as is,
diff --git a/crypto/rsaprivkey.asn1 b/crypto/rsaprivkey.asn1
index 731aea5edb0c..4ce06758e8af 100644
--- a/crypto/rsaprivkey.asn1
+++ b/crypto/rsaprivkey.asn1
@@ -3,9 +3,9 @@ RsaPrivKey ::= SEQUENCE {
 	n		INTEGER ({ rsa_get_n }),
 	e		INTEGER ({ rsa_get_e }),
 	d		INTEGER ({ rsa_get_d }),
-	prime1		INTEGER,
-	prime2		INTEGER,
-	exponent1	INTEGER,
-	exponent2	INTEGER,
-	coefficient	INTEGER
+	prime1		INTEGER ({ rsa_get_p }),
+	prime2		INTEGER ({ rsa_get_q }),
+	exponent1	INTEGER ({ rsa_get_dp }),
+	exponent2	INTEGER ({ rsa_get_dq }),
+	coefficient	INTEGER ({ rsa_get_qinv })
 }