Add basic BLAKE2b-256 support.
Our use-case for this does not require optimisation at the current time,
so a clean C implementation is fine.
Change-Id: I8f29572c33e8dbcc37961c099c71c14aafc8d0a3
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/45164
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/include/openssl/base.h b/include/openssl/base.h
index b678306..90924e6 100644
--- a/include/openssl/base.h
+++ b/include/openssl/base.h
@@ -376,6 +376,7 @@
typedef struct bignum_st BIGNUM;
typedef struct bio_method_st BIO_METHOD;
typedef struct bio_st BIO;
+typedef struct blake2b_state_st BLAKE2B_CTX;
typedef struct bn_gencb_st BN_GENCB;
typedef struct bn_mont_ctx_st BN_MONT_CTX;
typedef struct buf_mem_st BUF_MEM;
diff --git a/include/openssl/blake2.h b/include/openssl/blake2.h
new file mode 100644
index 0000000..9ec1e6c
--- /dev/null
+++ b/include/openssl/blake2.h
@@ -0,0 +1,62 @@
+/* Copyright (c) 2021, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#ifndef OPENSSL_HEADER_BLAKE2_H
+#define OPENSSL_HEADER_BLAKE2_H
+
+#include <openssl/base.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+#define BLAKE2B256_DIGEST_LENGTH (256 / 8)
+#define BLAKE2B_CBLOCK 128
+
+struct blake2b_state_st {
+ uint64_t h[8];
+ uint64_t t_low, t_high;
+ union {
+ uint8_t bytes[BLAKE2B_CBLOCK];
+ uint64_t words[16];
+ } block;
+ size_t block_used;
+};
+
+// BLAKE2B256_Init initialises |b2b| to perform a BLAKE2b-256 hash. There are no
+// pointers inside |b2b| thus release of |b2b| is purely managed by the caller.
+OPENSSL_EXPORT void BLAKE2B256_Init(BLAKE2B_CTX *b2b);
+
+// BLAKE2B256_Update appends |len| bytes from |data| to the digest being
+// calculated by |b2b|.
+OPENSSL_EXPORT void BLAKE2B256_Update(BLAKE2B_CTX *b2b, const void *data,
+ size_t len);
+
+// BLAKE2B256_Final completes the digest calculated by |b2b| and writes
+// |BLAKE2B256_DIGEST_LENGTH| bytes to |out|.
+OPENSSL_EXPORT void BLAKE2B256_Final(uint8_t out[BLAKE2B256_DIGEST_LENGTH],
+ BLAKE2B_CTX *b2b);
+
+// BLAKE2B256 writes the BLAKE2b-256 digset of |len| bytes from |data| to
+// |out|.
+OPENSSL_EXPORT void BLAKE2B256(const uint8_t *data, size_t len,
+ uint8_t out[BLAKE2B256_DIGEST_LENGTH]);
+
+
+#if defined(__cplusplus)
+} // extern C
+#endif
+
+#endif // OPENSSL_HEADER_BLAKE2_H
diff --git a/include/openssl/digest.h b/include/openssl/digest.h
index 8e398e8..66f1b5d 100644
--- a/include/openssl/digest.h
+++ b/include/openssl/digest.h
@@ -84,6 +84,7 @@
OPENSSL_EXPORT const EVP_MD *EVP_sha384(void);
OPENSSL_EXPORT const EVP_MD *EVP_sha512(void);
OPENSSL_EXPORT const EVP_MD *EVP_sha512_256(void);
+OPENSSL_EXPORT const EVP_MD *EVP_blake2b256(void);
// EVP_md5_sha1 is a TLS-specific |EVP_MD| which computes the concatenation of
// MD5 and SHA-1, as used in TLS 1.1 and below.
