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crypto: mv_cesa - fix for hash finalisation with data 

Since mv_hash_final_fallback() uses ctx->state, read out the digest
state register before calling it.

Signed-off-by: Phil Sutter <phil.sutter@viprinet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Phil Sutter 2012-05-25 15:54:49 +02:00 committed by Herbert Xu
parent 5741d2eeae
commit 4d03c5047a
1 changed files with 13 additions and 6 deletions
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19
drivers/crypto/mv_cesa.c
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@ -423,6 +423,15 @@ out:
return rc; return rc;
} }
static void mv_save_digest_state(struct mv_req_hash_ctx *ctx)
{
ctx->state[0] = readl(cpg->reg + DIGEST_INITIAL_VAL_A);
ctx->state[1] = readl(cpg->reg + DIGEST_INITIAL_VAL_B);
ctx->state[2] = readl(cpg->reg + DIGEST_INITIAL_VAL_C);
ctx->state[3] = readl(cpg->reg + DIGEST_INITIAL_VAL_D);
ctx->state[4] = readl(cpg->reg + DIGEST_INITIAL_VAL_E);
}
static void mv_hash_algo_completion(void) static void mv_hash_algo_completion(void)
{ {
struct ahash_request *req = ahash_request_cast(cpg->cur_req); struct ahash_request *req = ahash_request_cast(cpg->cur_req);
@ -437,14 +446,12 @@ static void mv_hash_algo_completion(void)
memcpy(req->result, cpg->sram + SRAM_DIGEST_BUF, memcpy(req->result, cpg->sram + SRAM_DIGEST_BUF,
crypto_ahash_digestsize(crypto_ahash_reqtfm crypto_ahash_digestsize(crypto_ahash_reqtfm
(req))); (req)));
} else } else {
mv_save_digest_state(ctx);
mv_hash_final_fallback(req); mv_hash_final_fallback(req);
}
} else { } else {
ctx->state[0] = readl(cpg->reg + DIGEST_INITIAL_VAL_A); mv_save_digest_state(ctx);
ctx->state[1] = readl(cpg->reg + DIGEST_INITIAL_VAL_B);
ctx->state[2] = readl(cpg->reg + DIGEST_INITIAL_VAL_C);
ctx->state[3] = readl(cpg->reg + DIGEST_INITIAL_VAL_D);
ctx->state[4] = readl(cpg->reg + DIGEST_INITIAL_VAL_E);
} }
} }