#define DESC_RSA_PUB_LEN (2 * CAAM_CMD_SZ + sizeof(struct rsa_pub_pdb))
#define DESC_RSA_PRIV_F1_LEN (2 * CAAM_CMD_SZ + \
sizeof(struct rsa_priv_f1_pdb))
+#define DESC_RSA_PRIV_F2_LEN (2 * CAAM_CMD_SZ + \
+ sizeof(struct rsa_priv_f2_pdb))
static void rsa_io_unmap(struct device *dev, struct rsa_edesc *edesc,
struct akcipher_request *req)
dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE);
}
+static void rsa_priv_f2_unmap(struct device *dev, struct rsa_edesc *edesc,
+ struct akcipher_request *req)
+{
+ struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+ struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
+ struct caam_rsa_key *key = &ctx->key;
+ struct rsa_priv_f2_pdb *pdb = &edesc->pdb.priv_f2;
+ size_t p_sz = key->p_sz;
+ size_t q_sz = key->p_sz;
+
+ dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE);
+ dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE);
+ dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE);
+ dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_TO_DEVICE);
+ dma_unmap_single(dev, pdb->tmp2_dma, q_sz, DMA_TO_DEVICE);
+}
+
/* RSA Job Completion handler */
static void rsa_pub_done(struct device *dev, u32 *desc, u32 err, void *context)
{
akcipher_request_complete(req, err);
}
+static void rsa_priv_f2_done(struct device *dev, u32 *desc, u32 err,
+ void *context)
+{
+ struct akcipher_request *req = context;
+ struct rsa_edesc *edesc;
+
+ if (err)
+ caam_jr_strstatus(dev, err);
+
+ edesc = container_of(desc, struct rsa_edesc, hw_desc[0]);
+
+ rsa_priv_f2_unmap(dev, edesc, req);
+ rsa_io_unmap(dev, edesc, req);
+ kfree(edesc);
+
+ akcipher_request_complete(req, err);
+}
+
static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req,
size_t desclen)
{
return 0;
}
+static int set_rsa_priv_f2_pdb(struct akcipher_request *req,
+ struct rsa_edesc *edesc)
+{
+ struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+ struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
+ struct caam_rsa_key *key = &ctx->key;
+ struct device *dev = ctx->dev;
+ struct rsa_priv_f2_pdb *pdb = &edesc->pdb.priv_f2;
+ int sec4_sg_index = 0;
+ size_t p_sz = key->p_sz;
+ size_t q_sz = key->p_sz;
+
+ pdb->d_dma = dma_map_single(dev, key->d, key->d_sz, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, pdb->d_dma)) {
+ dev_err(dev, "Unable to map RSA private exponent memory\n");
+ return -ENOMEM;
+ }
+
+ pdb->p_dma = dma_map_single(dev, key->p, p_sz, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, pdb->p_dma)) {
+ dev_err(dev, "Unable to map RSA prime factor p memory\n");
+ goto unmap_d;
+ }
+
+ pdb->q_dma = dma_map_single(dev, key->q, q_sz, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, pdb->q_dma)) {
+ dev_err(dev, "Unable to map RSA prime factor q memory\n");
+ goto unmap_p;
+ }
+
+ pdb->tmp1_dma = dma_map_single(dev, key->tmp1, p_sz, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, pdb->tmp1_dma)) {
+ dev_err(dev, "Unable to map RSA tmp1 memory\n");
+ goto unmap_q;
+ }
+
+ pdb->tmp2_dma = dma_map_single(dev, key->tmp2, q_sz, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, pdb->tmp2_dma)) {
+ dev_err(dev, "Unable to map RSA tmp2 memory\n");
+ goto unmap_tmp1;
+ }
+
+ if (edesc->src_nents > 1) {
+ pdb->sgf |= RSA_PRIV_PDB_SGF_G;
+ pdb->g_dma = edesc->sec4_sg_dma;
+ sec4_sg_index += edesc->src_nents;
+ } else {
+ pdb->g_dma = sg_dma_address(req->src);
+ }
+
+ if (edesc->dst_nents > 1) {
+ pdb->sgf |= RSA_PRIV_PDB_SGF_F;
+ pdb->f_dma = edesc->sec4_sg_dma +
+ sec4_sg_index * sizeof(struct sec4_sg_entry);
+ } else {
+ pdb->f_dma = sg_dma_address(req->dst);
+ }
+
+ pdb->sgf |= (key->d_sz << RSA_PDB_D_SHIFT) | key->n_sz;
+ pdb->p_q_len = (q_sz << RSA_PDB_Q_SHIFT) | p_sz;
+
+ return 0;
+
+unmap_tmp1:
+ dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_TO_DEVICE);
+unmap_q:
+ dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE);
+unmap_p:
+ dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE);
+unmap_d:
+ dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE);
+
+ return -ENOMEM;
+}
+
static int caam_rsa_enc(struct akcipher_request *req)
{
struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
return ret;
}
-static int caam_rsa_dec(struct akcipher_request *req)
+static int caam_rsa_dec_priv_f1(struct akcipher_request *req)
{
struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
- struct caam_rsa_key *key = &ctx->key;
struct device *jrdev = ctx->dev;
struct rsa_edesc *edesc;
int ret;
- if (unlikely(!key->n || !key->d))
- return -EINVAL;
-
- if (req->dst_len < key->n_sz) {
- req->dst_len = key->n_sz;
- dev_err(jrdev, "Output buffer length less than parameter n\n");
- return -EOVERFLOW;
- }
-
/* Allocate extended descriptor */
edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F1_LEN);
if (IS_ERR(edesc))
return ret;
}
+static int caam_rsa_dec_priv_f2(struct akcipher_request *req)
+{
+ struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+ struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
+ struct device *jrdev = ctx->dev;
+ struct rsa_edesc *edesc;
+ int ret;
+
+ /* Allocate extended descriptor */
+ edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F2_LEN);
+ if (IS_ERR(edesc))
+ return PTR_ERR(edesc);
+
+ /* Set RSA Decrypt Protocol Data Block - Private Key Form #2 */
+ ret = set_rsa_priv_f2_pdb(req, edesc);
+ if (ret)
+ goto init_fail;
+
+ /* Initialize Job Descriptor */
+ init_rsa_priv_f2_desc(edesc->hw_desc, &edesc->pdb.priv_f2);
+
+ ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f2_done, req);
+ if (!ret)
+ return -EINPROGRESS;
+
+ rsa_priv_f2_unmap(jrdev, edesc, req);
+
+init_fail:
+ rsa_io_unmap(jrdev, edesc, req);
+ kfree(edesc);
+ return ret;
+}
+
+static int caam_rsa_dec(struct akcipher_request *req)
+{
+ struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+ struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
+ struct caam_rsa_key *key = &ctx->key;
+ int ret;
+
+ if (unlikely(!key->n || !key->d))
+ return -EINVAL;
+
+ if (req->dst_len < key->n_sz) {
+ req->dst_len = key->n_sz;
+ dev_err(ctx->dev, "Output buffer length less than parameter n\n");
+ return -EOVERFLOW;
+ }
+
+ if (key->priv_form == FORM2)
+ ret = caam_rsa_dec_priv_f2(req);
+ else
+ ret = caam_rsa_dec_priv_f1(req);
+
+ return ret;
+}
+
static void caam_rsa_free_key(struct caam_rsa_key *key)
{
kzfree(key->d);
+ kzfree(key->p);
+ kzfree(key->q);
+ kzfree(key->tmp1);
+ kzfree(key->tmp2);
kfree(key->e);
kfree(key->n);
- key->d = NULL;
- key->e = NULL;
- key->n = NULL;
- key->d_sz = 0;
- key->e_sz = 0;
- key->n_sz = 0;
+ memset(key, 0, sizeof(*key));
}
static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes)
return -ENOMEM;
}
+static void caam_rsa_set_priv_key_form(struct caam_rsa_ctx *ctx,
+ struct rsa_key *raw_key)
+{
+ struct caam_rsa_key *rsa_key = &ctx->key;
+ size_t p_sz = raw_key->p_sz;
+ size_t q_sz = raw_key->q_sz;
+
+ rsa_key->p = caam_read_raw_data(raw_key->p, &p_sz);
+ if (!rsa_key->p)
+ return;
+ rsa_key->p_sz = p_sz;
+
+ rsa_key->q = caam_read_raw_data(raw_key->q, &q_sz);
+ if (!rsa_key->q)
+ goto free_p;
+ rsa_key->q_sz = q_sz;
+
+ rsa_key->tmp1 = kzalloc(raw_key->p_sz, GFP_DMA | GFP_KERNEL);
+ if (!rsa_key->tmp1)
+ goto free_q;
+
+ rsa_key->tmp2 = kzalloc(raw_key->q_sz, GFP_DMA | GFP_KERNEL);
+ if (!rsa_key->tmp2)
+ goto free_tmp1;
+
+ rsa_key->priv_form = FORM2;
+
+ return;
+
+free_tmp1:
+ kzfree(rsa_key->tmp1);
+free_q:
+ kzfree(rsa_key->q);
+free_p:
+ kzfree(rsa_key->p);
+}
+
static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
unsigned int keylen)
{
memcpy(rsa_key->d, raw_key.d, raw_key.d_sz);
memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
+ caam_rsa_set_priv_key_form(ctx, &raw_key);
+
return 0;
err:
#include "compat.h"
#include "pdb.h"
+/**
+ * caam_priv_key_form - CAAM RSA private key representation
+ * CAAM RSA private key may have either of two 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
+ */
+enum caam_priv_key_form {
+ FORM1,
+ FORM2,
+};
+
/**
* 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
+ * @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 *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;
};
/**
union {
struct rsa_pub_pdb pub;
struct rsa_priv_f1_pdb priv_f1;
+ struct rsa_priv_f2_pdb priv_f2;
} pdb;
u32 hw_desc[];
};
/* 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);
#endif
projects / users / hch / xfs.git / commitdiff