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efi_loader: simplify tcg2_create_digest()

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Bumping the digest list count, for all supported algorithms,  can be
calculated outside of the individual switch statements.  So let's do that
for every loop iteration instead and simplify the code a bit.

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Ilias Apalodimas 2021-04-22 14:32:14 +03:00 committed by Heinrich Schuchardt
parent a07ee3c198
commit 6fe8b4a39d
1 changed files with 1 additions and 4 deletions
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5
lib/efi_loader/efi_tcg2.c
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@ -535,30 +535,27 @@ static efi_status_t tcg2_create_digest(const u8 *input, u32 length,
sha1_starts(&ctx);
sha1_update(&ctx, input, length);
sha1_finish(&ctx, final);
digest_list->count++;
break;
case TPM2_ALG_SHA256:
sha256_starts(&ctx_256);
sha256_update(&ctx_256, input, length);
sha256_finish(&ctx_256, final);
digest_list->count++;
break;
case TPM2_ALG_SHA384:
sha384_starts(&ctx_512);
sha384_update(&ctx_512, input, length);
sha384_finish(&ctx_512, final);
digest_list->count++;
break;
case TPM2_ALG_SHA512:
sha512_starts(&ctx_512);
sha512_update(&ctx_512, input, length);
sha512_finish(&ctx_512, final);
digest_list->count++;
break;
default:
EFI_PRINT("Unsupported algorithm %x\n", hash_alg);
return EFI_INVALID_PARAMETER;
}
digest_list->count++;
digest_list->digests[i].hash_alg = hash_alg;
memcpy(&digest_list->digests[i].digest, final, (u32)alg_to_len(hash_alg));
}