diff options
| author | Jerome Forissier <jerome.forissier@linaro.org> | 2018-03-27 00:16:38 +0800 |
|---|---|---|
| committer | Jérôme Forissier <jerome.forissier@linaro.org> | 2018-04-03 18:25:00 +0200 |
| commit | 409d2ff0a248904b871dd7345ef3f8fdd55ad119 (patch) | |
| tree | 763019020c191166d401f93cf60db865d6a33c30 /core/lib | |
| parent | e3458e03c8bb1a97a55912b3efc31cf3371ef830 (diff) | |
core: crypto: ltc: introduce CFG_CORE_BIGNUM_MAX_BITS
Make the size of big numbers in the TEE core configurable. The default
(4096 bits) may be reduced if such a large key size is not needed, to
save core memory.
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'core/lib')
| -rw-r--r-- | core/lib/libtomcrypt/src/tee_ltc_provider.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/core/lib/libtomcrypt/src/tee_ltc_provider.c b/core/lib/libtomcrypt/src/tee_ltc_provider.c index 7bda173d..da6f06e9 100644 --- a/core/lib/libtomcrypt/src/tee_ltc_provider.c +++ b/core/lib/libtomcrypt/src/tee_ltc_provider.c @@ -493,12 +493,11 @@ TEE_Result crypto_hash_final(void *ctx, uint32_t algo, uint8_t *digest, #if defined(_CFG_CRYPTO_WITH_ACIPHER) -#define LTC_MAX_BITS_PER_VARIABLE (4096) #define LTC_VARIABLE_NUMBER (50) #define LTC_MEMPOOL_U32_SIZE \ mpa_scratch_mem_size_in_U32(LTC_VARIABLE_NUMBER, \ - LTC_MAX_BITS_PER_VARIABLE) + CFG_CORE_BIGNUM_MAX_BITS) #if defined(CFG_WITH_PAGER) #include <mm/tee_pager.h> @@ -654,7 +653,7 @@ static void tee_ltc_alloc_mpa(void) pool = get_mpa_scratch_memory_pool(&size_pool); init_mpa_tomcrypt(pool); - mpa_init_scratch_mem_sync(pool, size_pool, LTC_MAX_BITS_PER_VARIABLE, + mpa_init_scratch_mem_sync(pool, size_pool, CFG_CORE_BIGNUM_MAX_BITS, get_pool, put_pool, &pool_sync); mpa_set_random_generator(crypto_rng_read); @@ -719,7 +718,7 @@ void crypto_bignum_clear(struct bignum *s) static bool bn_alloc_max(struct bignum **s) { - size_t sz = mpa_StaticVarSizeInU32(LTC_MAX_BITS_PER_VARIABLE) * + size_t sz = mpa_StaticVarSizeInU32(CFG_CORE_BIGNUM_MAX_BITS) * sizeof(uint32_t) * 8; *s = crypto_bignum_allocate(sz); @@ -837,7 +836,7 @@ static TEE_Result rsadorep(rsa_key *ltc_key, const uint8_t *src, * required size of the out buffer without doing a partial decrypt. * We know the upper bound though. */ - blen = (mpa_StaticTempVarSizeInU32(LTC_MAX_BITS_PER_VARIABLE)) * + blen = (mpa_StaticTempVarSizeInU32(CFG_CORE_BIGNUM_MAX_BITS)) * sizeof(uint32_t); buf = malloc(blen); if (!buf) { |