[crypto] Add SHA-512 algorithm

This implementation has been verified using the NIST SHA-512 test
vectors.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 86 insertions, 0 deletions

diff --git a/src/include/ipxe/sha512.h b/src/include/ipxe/sha512.h
new file mode 100644
index 0000000..0cfa35b
--- /dev/null
+++ b/src/include/ipxe/sha512.h
@@ -0,0 +1,86 @@
+#ifndef _IPXE_SHA512_H
+#define _IPXE_SHA512_H
+
+/** @file
+ *
+ * SHA-512 algorithm
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <stdint.h>
+#include <ipxe/crypto.h>
+
+/** SHA-512 number of rounds */
+#define SHA512_ROUNDS 80
+
+/** An SHA-512 digest */
+struct sha512_digest {
+	/** Hash output */
+	uint64_t h[8];
+};
+
+/** An SHA-512 data block */
+union sha512_block {
+	/** Raw bytes */
+	uint8_t byte[128];
+	/** Raw qwords */
+	uint64_t qword[16];
+	/** Final block structure */
+	struct {
+		/** Padding */
+		uint8_t pad[112];
+		/** High 64 bits of length in bits */
+		uint64_t len_hi;
+		/** Low 64 bits of length in bits */
+		uint64_t len_lo;
+	} final;
+};
+
+/** SHA-512 digest and data block
+ *
+ * The order of fields within this structure is designed to minimise
+ * code size.
+ */
+struct sha512_digest_data {
+	/** Digest of data already processed */
+	struct sha512_digest digest;
+	/** Accumulated data */
+	union sha512_block data;
+} __attribute__ (( packed ));
+
+/** SHA-512 digest and data block */
+union sha512_digest_data_qwords {
+	/** Digest and data block */
+	struct sha512_digest_data dd;
+	/** Raw qwords */
+	uint64_t qword[ sizeof ( struct sha512_digest_data ) /
+			sizeof ( uint64_t ) ];
+};
+
+/** An SHA-512 context */
+struct sha512_context {
+	/** Amount of accumulated data */
+	size_t len;
+	/** Digest size */
+	size_t digestsize;
+	/** Digest and accumulated data */
+	union sha512_digest_data_qwords ddq;
+} __attribute__ (( packed ));
+
+/** SHA-512 context size */
+#define SHA512_CTX_SIZE sizeof ( struct sha512_context )
+
+/** SHA-512 digest size */
+#define SHA512_DIGEST_SIZE sizeof ( struct sha512_digest )
+
+extern void sha512_family_init ( struct sha512_context *context,
+				 const struct sha512_digest *init,
+				 size_t digestsize );
+extern void sha512_update ( void *ctx, const void *data, size_t len );
+extern void sha512_final ( void *ctx, void *out );
+
+extern struct digest_algorithm sha512_algorithm;
+
+#endif /* IPXE_SHA512_H */