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crypto: inside-secure - add support for arbitrary size hash/HMAC updates

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This patch fixes an issue with hash and HMAC operations that perform
"large" intermediate updates (i.e. combined size > 2 hash blocks) by
actually making use of the hardware's hash continue capabilities.
The original implementation would cache these updates in a buffer that
was 2 hash blocks in size and fail if all update calls combined would
overflow that buffer. Which caused the cryptomgr extra tests to fail.

Signed-off-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Pascal van Leeuwen
2019-07-02 16:39:59 +02:00
committed by Herbert Xu
parent 85695b093d
commit 41abed7d72
2 changed files with 266 additions and 155 deletions
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4
drivers/crypto/inside-secure/safexcel.h
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@@ -637,6 +637,8 @@ struct safexcel_context {
bool exit_inv;
};
#define HASH_CACHE_SIZE SHA512_BLOCK_SIZE
struct safexcel_ahash_export_state {
u64 len[2];
u64 processed[2];
@@ -644,7 +646,7 @@ struct safexcel_ahash_export_state {
u32 digest;
u32 state[SHA512_DIGEST_SIZE / sizeof(u32)];
u8 cache[SHA512_BLOCK_SIZE << 1];
u8 cache[HASH_CACHE_SIZE];
};
/*