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lib: rsa: workaround fdt64_to_cpu() align issue 

It seems fdt64_to_cpu() input param address must be 8-bytes
align, otherwise it brings a data-abort.

No root cause was found, let's workaround it.

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: Ic9f47d657b89b458bbd9ee52f0f931a689aec321
This commit is contained in:
Joseph Chen 2020-03-09 11:59:26 +08:00 committed by Jianhong Chen
parent 3fbeaf462e
commit a8f564c371
1 changed files with 17 additions and 4 deletions
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21
lib/rsa/rsa-mod-exp.c
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@ -250,6 +250,11 @@ static void rsa_convert_big_endian(uint32_t *dst, const uint32_t *src, int len)
int rsa_mod_exp_sw(const uint8_t *sig, uint32_t sig_len,
struct key_prop *prop, uint8_t *out)
{
#ifndef USE_HOSTCC
__cacheline_aligned uint64_t tmp;
#else
uint64_t tmp;
#endif
struct rsa_public_key key;
int ret;
@ -260,11 +265,19 @@ int rsa_mod_exp_sw(const uint8_t *sig, uint32_t sig_len,
key.n0inv = prop->n0inv;
key.len = prop->num_bits;
if (!prop->public_exponent)
if (!prop->public_exponent) {
key.exponent = RSA_DEFAULT_PUBEXP;
else
key.exponent =
fdt64_to_cpu(*((uint64_t *)(prop->public_exponent)));
} else {
/*
* it seems fdt64_to_cpu() input param address must be 8-bytes
* align, otherwise it brings a data-abort. No root cause was
* found.
*
* workaround it this a tmp value.
*/
memcpy((void *)&tmp, prop->public_exponent, sizeof(uint64_t));
key.exponent = fdt64_to_cpu(tmp);
}
if (!key.len || !prop->modulus || !prop->rr) {
debug("%s: Missing RSA key info", __func__);