Mirrors_Framework/nuttx
1
0
Fork 0
mirror of https://github.com/apache/nuttx.git synced 2026-05-27 11:26:12 +08:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

crypto/rsa: add exp mod in software crypto

Browse Source 
Implemented a simple exponentiation.
Signed-off-by: makejian <makejian@xiaomi.com>
This commit is contained in:
makejian
2024-08-07 22:03:37 +08:00
committed by Xiang Xiao
parent 72bdc9d9b4
commit 222840e135
1 changed files with 36 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
crypto/cryptosoft.c
+36
View File
@@ -1155,6 +1155,33 @@ done:
return 0; return 0;
} }
int swcr_mod_exp(struct cryptkop *krp)
{
uint8_t *input = (uint8_t *)krp->krp_param[0].crp_p;
uint8_t *exp = (uint8_t *)krp->krp_param[1].crp_p;
uint8_t *modulus = (uint8_t *)krp->krp_param[2].crp_p;
uint8_t *output = (uint8_t *)krp->krp_param[3].crp_p;
int input_len = krp->krp_param[0].crp_nbits / 8;
int exp_len = krp->krp_param[1].crp_nbits / 8;
int modulus_len = krp->krp_param[2].crp_nbits / 8;
int output_len = krp->krp_param[3].crp_nbits / 8;
struct bn a;
struct bn e;
struct bn n;
struct bn r;
bignum_init(&a);
bignum_init(&e);
bignum_init(&n);
bignum_init(&r);
memcpy(e.array, exp, exp_len);
memcpy(n.array, modulus, modulus_len);
memcpy(a.array, input, input_len);
pow_mod_faster(&a, &e, &n, &r);
memcpy(output, r.array, output_len);
return 0;
}
static int swcr_dh_make_public(FAR struct cryptkop *krp) static int swcr_dh_make_public(FAR struct cryptkop *krp)
{ {
/* Curve25519 is used for testing. In fact, /* Curve25519 is used for testing. In fact,
@@ -1229,6 +1256,13 @@ int swcr_kprocess(struct cryptkop *krp)
switch (krp->krp_op) switch (krp->krp_op)
{ {
case CRK_MOD_EXP:
if ((krp->krp_status = swcr_mod_exp(krp)) != 0)
{
goto done;
}
break;
case CRK_DH_MAKE_PUBLIC: case CRK_DH_MAKE_PUBLIC:
if ((krp->krp_status = swcr_dh_make_public(krp) != 0)) if ((krp->krp_status = swcr_dh_make_public(krp) != 0))
{ {
@@ -1248,6 +1282,7 @@ int swcr_kprocess(struct cryptkop *krp)
{ {
goto done; goto done;
} }
break; break;
default: default:
@@ -1317,6 +1352,7 @@ void swcr_init(void)
crypto_register(swcr_id, algs, swcr_newsession, crypto_register(swcr_id, algs, swcr_newsession,
swcr_freesession, swcr_process); swcr_freesession, swcr_process);
kalgs[CRK_MOD_EXP] = CRYPTO_ALG_FLAG_SUPPORTED;
kalgs[CRK_DH_MAKE_PUBLIC] = CRYPTO_ALG_FLAG_SUPPORTED; kalgs[CRK_DH_MAKE_PUBLIC] = CRYPTO_ALG_FLAG_SUPPORTED;
kalgs[CRK_DH_COMPUTE_KEY] = CRYPTO_ALG_FLAG_SUPPORTED; kalgs[CRK_DH_COMPUTE_KEY] = CRYPTO_ALG_FLAG_SUPPORTED;
kalgs[CRK_RSA_PKCS15_VERIFY] = CRYPTO_ALG_FLAG_SUPPORTED; kalgs[CRK_RSA_PKCS15_VERIFY] = CRYPTO_ALG_FLAG_SUPPORTED;