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lib: rsa: bring exp_len in line when generating a key_prop

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The exponent field of struct key_prop gets allocated an uint64_t,
and the contents are positioned from the back, so an exponent of
"0x01 0x00 0x01" becomes 0x0 0x0 0x0 0x0 0x0 0x1 0x0 0x1"

Right now rsa_gen_key_prop() allocates a uint64_t but sets exp_len
to the size returned from the parser, while on the other hand the
when getting the key from the devicetree exp_len always gets set to
sizeof(uint64_t).

So bring that in line with the established code.

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Heiko Stuebner
2020-06-18 16:23:23 +02:00
committed by Tom Rini
parent 447b1d7580
commit 8434b43730
1 changed files with 1 additions and 1 deletions
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2
lib/rsa/rsa-keyprop.c
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@@ -691,7 +691,7 @@ int rsa_gen_key_prop(const void *key, uint32_t keylen, struct key_prop **prop)
memcpy((void *)(*prop)->public_exponent + sizeof(uint64_t) memcpy((void *)(*prop)->public_exponent + sizeof(uint64_t)
- rsa_key.e_sz, - rsa_key.e_sz,
rsa_key.e, rsa_key.e_sz); rsa_key.e, rsa_key.e_sz);
(*prop)->exp_len = rsa_key.e_sz; (*prop)->exp_len = sizeof(uint64_t);
/* n0 inverse */ /* n0 inverse */
br_i32_decode(n, &rsa_key.n[i], rsa_key.n_sz - i); br_i32_decode(n, &rsa_key.n[i], rsa_key.n_sz - i);