lib: Adapt digest header files to MbedTLS
Adapt digest header files to support both original libs and MbedTLS
by switching on/off MBEDTLS_LIB_CRYPTO.
Introduce <alg>_LEGACY kconfig for legacy hash implementations.
sha256.o should depend on SHA256 kconfig only but not SUPPORT_EMMC_RPMB,
SHA256 should be selected when SUPPORT_EMMC_RPMB is enabled instead.
`IS_ENABLED` or `CONFIG_IS_ENABLED` is not applicable here, since
including <linux/kconfig.h> causes undefined reference on schedule()
with sandbox build, as <linux/kconfig.h> includes <generated/autoconf.h>
which enables `CONFIG_HW_WATCHDOG` and `CONFIG_WATCHDOG` but no schedule()
are defined in sandbox build,
Thus we use `#if defined(CONFIG_MBEDTLS_LIB_CRYPTO)` instead.
Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/include/u-boot/sha256.h b/include/u-boot/sha256.h
index a4fe176..b58d5b5 100644
--- a/include/u-boot/sha256.h
+++ b/include/u-boot/sha256.h
@@ -3,6 +3,22 @@
#include <linux/types.h>
+#if defined(CONFIG_MBEDTLS_LIB_CRYPTO)
+/*
+ * FIXME:
+ * MbedTLS define the members of "mbedtls_sha256_context" as private,
+ * but "state" needs to be access by arch/arm/cpu/armv8/sha256_ce_glue.
+ * MBEDTLS_ALLOW_PRIVATE_ACCESS needs to be enabled to allow the external
+ * access.
+ * Directly including <external/mbedtls/library/common.h> is not allowed,
+ * since this will include <malloc.h> and break the sandbox test.
+ */
+#define MBEDTLS_ALLOW_PRIVATE_ACCESS
+
+#include <mbedtls/sha256.h>
+#endif
+
+#define SHA224_SUM_LEN 28
#define SHA256_SUM_LEN 32
#define SHA256_DER_LEN 19
@@ -11,11 +27,15 @@
/* Reset watchdog each time we process this many bytes */
#define CHUNKSZ_SHA256 (64 * 1024)
+#if defined(CONFIG_MBEDTLS_LIB_CRYPTO)
+typedef mbedtls_sha256_context sha256_context;
+#else
typedef struct {
uint32_t total[2];
uint32_t state[8];
uint8_t buffer[64];
} sha256_context;
+#endif
void sha256_starts(sha256_context * ctx);
void sha256_update(sha256_context *ctx, const uint8_t *input, uint32_t length);