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path: root/drivers/crypto/caam/caampkc.h
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Diffstat (limited to 'drivers/crypto/caam/caampkc.h')
-rw-r--r--drivers/crypto/caam/caampkc.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/crypto/caam/caampkc.h b/drivers/crypto/caam/caampkc.h
index f595d159b112..87ab75e9df43 100644
--- a/drivers/crypto/caam/caampkc.h
+++ b/drivers/crypto/caam/caampkc.h
@@ -13,21 +13,75 @@
#include "pdb.h"
/**
+ * caam_priv_key_form - CAAM RSA private key representation
+ * CAAM RSA private key may have either of three forms.
+ *
+ * 1. The first representation consists of the pair (n, d), where the
+ * components have the following meanings:
+ * n the RSA modulus
+ * d the RSA private exponent
+ *
+ * 2. The second representation consists of the triplet (p, q, d), where the
+ * components have the following meanings:
+ * p the first prime factor of the RSA modulus n
+ * q the second prime factor of the RSA modulus n
+ * d the RSA private exponent
+ *
+ * 3. The third representation consists of the quintuple (p, q, dP, dQ, qInv),
+ * where the components have the following meanings:
+ * p the first prime factor of the RSA modulus n
+ * q the second prime factor of the RSA modulus n
+ * dP the first factors's CRT exponent
+ * dQ the second factors's CRT exponent
+ * qInv the (first) CRT coefficient
+ *
+ * The benefit of using the third or the second key form is lower computational
+ * cost for the decryption and signature operations.
+ */
+enum caam_priv_key_form {
+ FORM1,
+ FORM2,
+ FORM3
+};
+
+/**
* caam_rsa_key - CAAM RSA key structure. Keys are allocated in DMA zone.
* @n : RSA modulus raw byte stream
* @e : RSA public exponent raw byte stream
* @d : RSA private exponent raw byte stream
+ * @p : RSA prime factor p of RSA modulus n
+ * @q : RSA prime factor q of RSA modulus n
+ * @dp : RSA CRT exponent of p
+ * @dp : RSA CRT exponent of q
+ * @qinv : RSA CRT coefficient
+ * @tmp1 : CAAM uses this temporary buffer as internal state buffer.
+ * It is assumed to be as long as p.
+ * @tmp2 : CAAM uses this temporary buffer as internal state buffer.
+ * It is assumed to be as long as q.
* @n_sz : length in bytes of RSA modulus n
* @e_sz : length in bytes of RSA public exponent
* @d_sz : length in bytes of RSA private exponent
+ * @p_sz : length in bytes of RSA prime factor p of RSA modulus n
+ * @q_sz : length in bytes of RSA prime factor q of RSA modulus n
+ * @priv_form : CAAM RSA private key representation
*/
struct caam_rsa_key {
u8 *n;
u8 *e;
u8 *d;
+ u8 *p;
+ u8 *q;
+ u8 *dp;
+ u8 *dq;
+ u8 *qinv;
+ u8 *tmp1;
+ u8 *tmp2;
size_t n_sz;
size_t e_sz;
size_t d_sz;
+ size_t p_sz;
+ size_t q_sz;
+ enum caam_priv_key_form priv_form;
};
/**
@@ -59,6 +113,8 @@ struct rsa_edesc {
union {
struct rsa_pub_pdb pub;
struct rsa_priv_f1_pdb priv_f1;
+ struct rsa_priv_f2_pdb priv_f2;
+ struct rsa_priv_f3_pdb priv_f3;
} pdb;
u32 hw_desc[];
};
@@ -66,5 +122,7 @@ struct rsa_edesc {
/* Descriptor construction primitives. */
void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb);
void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb);
+void init_rsa_priv_f2_desc(u32 *desc, struct rsa_priv_f2_pdb *pdb);
+void init_rsa_priv_f3_desc(u32 *desc, struct rsa_priv_f3_pdb *pdb);
#endif