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crypto: akcipher - Changes to asymmetric key API

Browse source 
Setkey function has been split into set_priv_key and set_pub_key.
Akcipher requests takes sgl for src and dst instead of void *.
Users of the API i.e. two existing RSA implementation and
test mgr code have been updated accordingly.

Signed-off-by: Tadeusz Struk <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Tadeusz Struk 2015-10-08 09:26:55 -07:00 • committed by Herbert Xu
commit 22287b0b59
15 changed files with 407 additions and 164 deletions
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83
crypto/rsa.c
View file

@ -97,24 +97,21 @@ static int rsa_enc(struct akcipher_request *req)
goto err_free_c;
}
m = mpi_read_raw_data(req->src, req->src_len);
if (!m) {
ret = -ENOMEM;
ret = -ENOMEM;
m = mpi_read_raw_from_sgl(req->src, req->src_len);
if (!m)
goto err_free_c;
}
ret = _rsa_enc(pkey, c, m);
if (ret)
goto err_free_m;
ret = mpi_read_buffer(c, req->dst, req->dst_len, &req->dst_len, &sign);
ret = mpi_write_to_sgl(c, req->dst, &req->dst_len, &sign);
if (ret)
goto err_free_m;
if (sign < 0) {
if (sign < 0)
ret = -EBADMSG;
goto err_free_m;
}
err_free_m:
mpi_free(m);
@ -145,25 +142,21 @@ static int rsa_dec(struct akcipher_request *req)
goto err_free_m;
}
c = mpi_read_raw_data(req->src, req->src_len);
if (!c) {
ret = -ENOMEM;
ret = -ENOMEM;
c = mpi_read_raw_from_sgl(req->src, req->src_len);
if (!c)
goto err_free_m;
}
ret = _rsa_dec(pkey, m, c);
if (ret)
goto err_free_c;
ret = mpi_read_buffer(m, req->dst, req->dst_len, &req->dst_len, &sign);
ret = mpi_write_to_sgl(m, req->dst, &req->dst_len, &sign);
if (ret)
goto err_free_c;
if (sign < 0) {
if (sign < 0)
ret = -EBADMSG;
goto err_free_c;
}
err_free_c:
mpi_free(c);
err_free_m:
@ -193,24 +186,21 @@ static int rsa_sign(struct akcipher_request *req)
goto err_free_s;
}
m = mpi_read_raw_data(req->src, req->src_len);
if (!m) {
ret = -ENOMEM;
ret = -ENOMEM;
m = mpi_read_raw_from_sgl(req->src, req->src_len);
if (!m)
goto err_free_s;
}
ret = _rsa_sign(pkey, s, m);
if (ret)
goto err_free_m;
ret = mpi_read_buffer(s, req->dst, req->dst_len, &req->dst_len, &sign);
ret = mpi_write_to_sgl(s, req->dst, &req->dst_len, &sign);
if (ret)
goto err_free_m;
if (sign < 0) {
if (sign < 0)
ret = -EBADMSG;
goto err_free_m;
}
err_free_m:
mpi_free(m);
@ -241,7 +231,8 @@ static int rsa_verify(struct akcipher_request *req)
goto err_free_m;
}
s = mpi_read_raw_data(req->src, req->src_len);
ret = -ENOMEM;
s = mpi_read_raw_from_sgl(req->src, req->src_len);
if (!s) {
ret = -ENOMEM;
goto err_free_m;
@ -251,14 +242,12 @@ static int rsa_verify(struct akcipher_request *req)
if (ret)
goto err_free_s;
ret = mpi_read_buffer(m, req->dst, req->dst_len, &req->dst_len, &sign);
ret = mpi_write_to_sgl(m, req->dst, &req->dst_len, &sign);
if (ret)
goto err_free_s;
if (sign < 0) {
if (sign < 0)
ret = -EBADMSG;
goto err_free_s;
}
err_free_s:
mpi_free(s);
@ -282,13 +271,13 @@ static int rsa_check_key_length(unsigned int len)
return -EINVAL;
}
static int rsa_setkey(struct crypto_akcipher *tfm, const void *key,
unsigned int keylen)
static int rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
unsigned int keylen)
{
struct rsa_key *pkey = akcipher_tfm_ctx(tfm);
int ret;
ret = rsa_parse_key(pkey, key, keylen);
ret = rsa_parse_pub_key(pkey, key, keylen);
if (ret)
return ret;
@ -299,6 +288,30 @@ static int rsa_setkey(struct crypto_akcipher *tfm, const void *key,
return ret;
}
static int rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
unsigned int keylen)
{
struct rsa_key *pkey = akcipher_tfm_ctx(tfm);
int ret;
ret = rsa_parse_priv_key(pkey, key, keylen);
if (ret)
return ret;
if (rsa_check_key_length(mpi_get_size(pkey->n) << 3)) {
rsa_free_key(pkey);
ret = -EINVAL;
}
return ret;
}
static int rsa_max_size(struct crypto_akcipher *tfm)
{
struct rsa_key *pkey = akcipher_tfm_ctx(tfm);
return pkey->n ? mpi_get_size(pkey->n) : -EINVAL;
}
static void rsa_exit_tfm(struct crypto_akcipher *tfm)
{
struct rsa_key *pkey = akcipher_tfm_ctx(tfm);
@ -311,7 +324,9 @@ static struct akcipher_alg rsa = {
.decrypt = rsa_dec,
.sign = rsa_sign,
.verify = rsa_verify,
.setkey = rsa_setkey,
.set_priv_key = rsa_set_priv_key,
.set_pub_key = rsa_set_pub_key,
.max_size = rsa_max_size,
.exit = rsa_exit_tfm,
.base = {
.cra_name = "rsa",