1 files changed, 62 insertions, 0 deletions
diff --git a/include/u-boot/sha256.h b/include/u-boot/sha256.h
new file mode 100644
index 00000000000..2d86508332e
--- /dev/null
+++ b/include/u-boot/sha256.h
@@ -0,0 +1,62 @@
+#ifndef _SHA256_H
+#define _SHA256_H
+
+#include <linux/compiler_attributes.h>
+#include <linux/errno.h>
+#include <linux/kconfig.h>
+#include <linux/types.h>
+
+#if CONFIG_IS_ENABLED(MBEDTLS_LIB_CRYPTO)
+#include "mbedtls_options.h"
+#include <mbedtls/sha256.h>
+#endif
+
+#define SHA224_SUM_LEN	28
+#define SHA256_SUM_LEN	32
+#define SHA256_DER_LEN	19
+
+extern const uint8_t sha256_der_prefix[];
+
+/* Reset watchdog each time we process this many bytes */
+#define CHUNKSZ_SHA256	(64 * 1024)
+
+#if CONFIG_IS_ENABLED(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);
+void sha256_finish(sha256_context * ctx, uint8_t digest[SHA256_SUM_LEN]);
+
+void sha256_csum_wd(const unsigned char *input, unsigned int ilen,
+		unsigned char *output, unsigned int chunk_sz);
+
+int sha256_hmac(const unsigned char *key, int keylen,
+		const unsigned char *input, unsigned int ilen,
+		unsigned char *output);
+
+#if CONFIG_IS_ENABLED(HKDF_MBEDTLS)
+int sha256_hkdf(const unsigned char *salt, int saltlen,
+		const unsigned char *ikm, int ikmlen,
+		const unsigned char *info, int infolen,
+		unsigned char *output, int outputlen);
+#else
+static inline int sha256_hkdf(const unsigned char __always_unused *salt,
+			      int __always_unused saltlen,
+			      const unsigned char __always_unused *ikm,
+			      int __always_unused ikmlen,
+			      const unsigned char __always_unused *info,
+			      int __always_unused infolen,
+			      unsigned char __always_unused *output,
+			      int __always_unused outputlen) {
+	return -EOPNOTSUPP;
+}
+#endif
+
+#endif /* _SHA256_H */