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Fix bug in LMS public key loading

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To avoid using the type before it is parsed from the signature

Signed-off-by: Raef Coles <raef.coles@arm.com>
This commit is contained in:
Raef Coles
2022-10-07 16:06:35 +01:00
parent 3f6cdd7aab
commit e89488debf
2 changed files with 10 additions and 5 deletions
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5
library/lmots.c
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@@ -409,6 +409,11 @@ void mbedtls_lmots_public_free( mbedtls_lmots_public_t *ctx )
int mbedtls_lmots_import_public_key( mbedtls_lmots_public_t *ctx,
const unsigned char *key, size_t key_len )
{
if( key_len < MBEDTLS_LMOTS_SIG_TYPE_OFFSET + MBEDTLS_LMOTS_TYPE_LEN )
{
return( MBEDTLS_ERR_LMS_BAD_INPUT_DATA );
}
ctx->params.type =
mbedtls_lms_network_bytes_to_unsigned_int( MBEDTLS_LMOTS_TYPE_LEN,
key + MBEDTLS_LMOTS_SIG_TYPE_OFFSET );