--- /dev/null
+/* ====================================================================
+ * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ==================================================================== */
+
+#ifndef OPENSSL_HEADER_MODES_INTERNAL_H
+#define OPENSSL_HEADER_MODES_INTERNAL_H
+
+#include <openssl/base.h>
+
+#include <string.h>
+
+#include "../../internal.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+#define STRICT_ALIGNMENT 1
+#if defined(OPENSSL_X86_64) || defined(OPENSSL_X86) || defined(OPENSSL_AARCH64)
+#undef STRICT_ALIGNMENT
+#define STRICT_ALIGNMENT 0
+#endif
+
+static inline uint32_t GETU32(const void *in) {
+ uint32_t v;
+ OPENSSL_memcpy(&v, in, sizeof(v));
+ return CRYPTO_bswap4(v);
+}
+
+static inline void PUTU32(void *out, uint32_t v) {
+ v = CRYPTO_bswap4(v);
+ OPENSSL_memcpy(out, &v, sizeof(v));
+}
+
+static inline size_t load_word_le(const void *in) {
+ size_t v;
+ OPENSSL_memcpy(&v, in, sizeof(v));
+ return v;
+}
+
+static inline void store_word_le(void *out, size_t v) {
+ OPENSSL_memcpy(out, &v, sizeof(v));
+}
+
+// block128_f is the type of a 128-bit, block cipher.
+typedef void (*block128_f)(const uint8_t in[16], uint8_t out[16],
+ const void *key);
+
+// GCM definitions
+typedef struct { uint64_t hi,lo; } u128;
+
+// gmult_func multiplies |Xi| by the GCM key and writes the result back to
+// |Xi|.
+typedef void (*gmult_func)(uint64_t Xi[2], const u128 Htable[16]);
+
+// ghash_func repeatedly multiplies |Xi| by the GCM key and adds in blocks from
+// |inp|. The result is written back to |Xi| and the |len| argument must be a
+// multiple of 16.
+typedef void (*ghash_func)(uint64_t Xi[2], const u128 Htable[16],
+ const uint8_t *inp, size_t len);
+
+// This differs from upstream's |gcm128_context| in that it does not have the
+// |key| pointer, in order to make it |memcpy|-friendly. Rather the key is
+// passed into each call that needs it.
+struct gcm128_context {
+ // Following 6 names follow names in GCM specification
+ union {
+ uint64_t u[2];
+ uint32_t d[4];
+ uint8_t c[16];
+ size_t t[16 / sizeof(size_t)];
+ } Yi, EKi, EK0, len, Xi;
+
+ // Note that the order of |Xi|, |H| and |Htable| is fixed by the MOVBE-based,
+ // x86-64, GHASH assembly.
+ u128 H;
+ u128 Htable[16];
+ gmult_func gmult;
+ ghash_func ghash;
+
+ unsigned int mres, ares;
+ block128_f block;
+
+ // use_aesni_gcm_crypt is true if this context should use the assembly
+ // functions |aesni_gcm_encrypt| and |aesni_gcm_decrypt| to process data.
+ unsigned use_aesni_gcm_crypt:1;
+};
+
+#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
+// crypto_gcm_clmul_enabled returns one if the CLMUL implementation of GCM is
+// used.
+int crypto_gcm_clmul_enabled(void);
+#endif
+
+
+// CTR.
+
+// ctr128_f is the type of a function that performs CTR-mode encryption.
+typedef void (*ctr128_f)(const uint8_t *in, uint8_t *out, size_t blocks,
+ const void *key, const uint8_t ivec[16]);
+
+// CRYPTO_ctr128_encrypt encrypts (or decrypts, it's the same in CTR mode)
+// |len| bytes from |in| to |out| using |block| in counter mode. There's no
+// requirement that |len| be a multiple of any value and any partial blocks are
+// stored in |ecount_buf| and |*num|, which must be zeroed before the initial
+// call. The counter is a 128-bit, big-endian value in |ivec| and is
+// incremented by this function.
+void CRYPTO_ctr128_encrypt(const uint8_t *in, uint8_t *out, size_t len,
+ const void *key, uint8_t ivec[16],
+ uint8_t ecount_buf[16], unsigned *num,
+ block128_f block);
+
+// CRYPTO_ctr128_encrypt_ctr32 acts like |CRYPTO_ctr128_encrypt| but takes
+// |ctr|, a function that performs CTR mode but only deals with the lower 32
+// bits of the counter. This is useful when |ctr| can be an optimised
+// function.
+void CRYPTO_ctr128_encrypt_ctr32(const uint8_t *in, uint8_t *out, size_t len,
+ const void *key, uint8_t ivec[16],
+ uint8_t ecount_buf[16], unsigned *num,
+ ctr128_f ctr);
+
+#if !defined(OPENSSL_NO_ASM) && \
+ (defined(OPENSSL_X86) || defined(OPENSSL_X86_64))
+void aesni_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out, size_t blocks,
+ const void *key, const uint8_t *ivec);
+#endif
+
+
+// GCM.
+//
+// This API differs from the upstream API slightly. The |GCM128_CONTEXT| does
+// not have a |key| pointer that points to the key as upstream's version does.
+// Instead, every function takes a |key| parameter. This way |GCM128_CONTEXT|
+// can be safely copied.
+
+typedef struct gcm128_context GCM128_CONTEXT;
+
+// CRYPTO_ghash_init writes a precomputed table of powers of |gcm_key| to
+// |out_table| and sets |*out_mult| and |*out_hash| to (potentially hardware
+// accelerated) functions for performing operations in the GHASH field. If the
+// AVX implementation was used |*out_is_avx| will be true.
+void CRYPTO_ghash_init(gmult_func *out_mult, ghash_func *out_hash,
+ u128 *out_key, u128 out_table[16], int *out_is_avx,
+ const uint8_t *gcm_key);
+
+// CRYPTO_gcm128_init initialises |ctx| to use |block| (typically AES) with
+// the given key. |is_aesni_encrypt| is one if |block| is |aesni_encrypt|.
+OPENSSL_EXPORT void CRYPTO_gcm128_init(GCM128_CONTEXT *ctx, const void *key,
+ block128_f block, int is_aesni_encrypt);
+
+// CRYPTO_gcm128_setiv sets the IV (nonce) for |ctx|. The |key| must be the
+// same key that was passed to |CRYPTO_gcm128_init|.
+OPENSSL_EXPORT void CRYPTO_gcm128_setiv(GCM128_CONTEXT *ctx, const void *key,
+ const uint8_t *iv, size_t iv_len);
+
+// CRYPTO_gcm128_aad sets the authenticated data for an instance of GCM.
+// This must be called before and data is encrypted. It returns one on success
+// and zero otherwise.
+OPENSSL_EXPORT int CRYPTO_gcm128_aad(GCM128_CONTEXT *ctx, const uint8_t *aad,
+ size_t len);
+
+// CRYPTO_gcm128_encrypt encrypts |len| bytes from |in| to |out|. The |key|
+// must be the same key that was passed to |CRYPTO_gcm128_init|. It returns one
+// on success and zero otherwise.
+OPENSSL_EXPORT int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx, const void *key,
+ const uint8_t *in, uint8_t *out,
+ size_t len);
+
+// CRYPTO_gcm128_decrypt decrypts |len| bytes from |in| to |out|. The |key|
+// must be the same key that was passed to |CRYPTO_gcm128_init|. It returns one
+// on success and zero otherwise.
+OPENSSL_EXPORT int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx, const void *key,
+ const uint8_t *in, uint8_t *out,
+ size_t len);
+
+// CRYPTO_gcm128_encrypt_ctr32 encrypts |len| bytes from |in| to |out| using
+// a CTR function that only handles the bottom 32 bits of the nonce, like
+// |CRYPTO_ctr128_encrypt_ctr32|. The |key| must be the same key that was
+// passed to |CRYPTO_gcm128_init|. It returns one on success and zero
+// otherwise.
+OPENSSL_EXPORT int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx,
+ const void *key,
+ const uint8_t *in, uint8_t *out,
+ size_t len, ctr128_f stream);
+
+// CRYPTO_gcm128_decrypt_ctr32 decrypts |len| bytes from |in| to |out| using
+// a CTR function that only handles the bottom 32 bits of the nonce, like
+// |CRYPTO_ctr128_encrypt_ctr32|. The |key| must be the same key that was
+// passed to |CRYPTO_gcm128_init|. It returns one on success and zero
+// otherwise.
+OPENSSL_EXPORT int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx,
+ const void *key,
+ const uint8_t *in, uint8_t *out,
+ size_t len, ctr128_f stream);
+
+// CRYPTO_gcm128_finish calculates the authenticator and compares it against
+// |len| bytes of |tag|. It returns one on success and zero otherwise.
+OPENSSL_EXPORT int CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx, const uint8_t *tag,
+ size_t len);
+
+// CRYPTO_gcm128_tag calculates the authenticator and copies it into |tag|.
+// The minimum of |len| and 16 bytes are copied into |tag|.
+OPENSSL_EXPORT void CRYPTO_gcm128_tag(GCM128_CONTEXT *ctx, uint8_t *tag,
+ size_t len);
+
+
+// CCM.
+
+typedef struct ccm128_context {
+ block128_f block;
+ ctr128_f ctr;
+ unsigned M, L;
+} CCM128_CONTEXT;
+
+// CRYPTO_ccm128_init initialises |ctx| to use |block| (typically AES) with the
+// specified |M| and |L| parameters. It returns one on success and zero if |M|
+// or |L| is invalid.
+int CRYPTO_ccm128_init(CCM128_CONTEXT *ctx, const void *key, block128_f block,
+ ctr128_f ctr, unsigned M, unsigned L);
+
+// CRYPTO_ccm128_max_input returns the maximum input length accepted by |ctx|.
+size_t CRYPTO_ccm128_max_input(const CCM128_CONTEXT *ctx);
+
+// CRYPTO_ccm128_encrypt encrypts |len| bytes from |in| to |out| writing the tag
+// to |out_tag|. |key| must be the same key that was passed to
+// |CRYPTO_ccm128_init|. It returns one on success and zero otherwise.
+int CRYPTO_ccm128_encrypt(const CCM128_CONTEXT *ctx, const void *key,
+ uint8_t *out, uint8_t *out_tag, size_t tag_len,
+ const uint8_t *nonce, size_t nonce_len,
+ const uint8_t *in, size_t len, const uint8_t *aad,
+ size_t aad_len);
+
+// CRYPTO_ccm128_decrypt decrypts |len| bytes from |in| to |out|, writing the
+// expected tag to |out_tag|. |key| must be the same key that was passed to
+// |CRYPTO_ccm128_init|. It returns one on success and zero otherwise.
+int CRYPTO_ccm128_decrypt(const CCM128_CONTEXT *ctx, const void *key,
+ uint8_t *out, uint8_t *out_tag, size_t tag_len,
+ const uint8_t *nonce, size_t nonce_len,
+ const uint8_t *in, size_t len, const uint8_t *aad,
+ size_t aad_len);
+
+
+// CBC.
+
+// cbc128_f is the type of a function that performs CBC-mode encryption.
+typedef void (*cbc128_f)(const uint8_t *in, uint8_t *out, size_t len,
+ const void *key, uint8_t ivec[16], int enc);
+
+// CRYPTO_cbc128_encrypt encrypts |len| bytes from |in| to |out| using the
+// given IV and block cipher in CBC mode. The input need not be a multiple of
+// 128 bits long, but the output will round up to the nearest 128 bit multiple,
+// zero padding the input if needed. The IV will be updated on return.
+void CRYPTO_cbc128_encrypt(const uint8_t *in, uint8_t *out, size_t len,
+ const void *key, uint8_t ivec[16], block128_f block);
+
+// CRYPTO_cbc128_decrypt decrypts |len| bytes from |in| to |out| using the
+// given IV and block cipher in CBC mode. If |len| is not a multiple of 128
+// bits then only that many bytes will be written, but a multiple of 128 bits
+// is always read from |in|. The IV will be updated on return.
+void CRYPTO_cbc128_decrypt(const uint8_t *in, uint8_t *out, size_t len,
+ const void *key, uint8_t ivec[16], block128_f block);
+
+
+// OFB.
+
+// CRYPTO_ofb128_encrypt encrypts (or decrypts, it's the same with OFB mode)
+// |len| bytes from |in| to |out| using |block| in OFB mode. There's no
+// requirement that |len| be a multiple of any value and any partial blocks are
+// stored in |ivec| and |*num|, the latter must be zero before the initial
+// call.
+void CRYPTO_ofb128_encrypt(const uint8_t *in, uint8_t *out,
+ size_t len, const void *key, uint8_t ivec[16],
+ unsigned *num, block128_f block);
+
+
+// CFB.
+
+// CRYPTO_cfb128_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes
+// from |in| to |out| using |block| in CFB mode. There's no requirement that
+// |len| be a multiple of any value and any partial blocks are stored in |ivec|
+// and |*num|, the latter must be zero before the initial call.
+void CRYPTO_cfb128_encrypt(const uint8_t *in, uint8_t *out, size_t len,
+ const void *key, uint8_t ivec[16], unsigned *num,
+ int enc, block128_f block);
+
+// CRYPTO_cfb128_8_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes
+// from |in| to |out| using |block| in CFB-8 mode. Prior to the first call
+// |num| should be set to zero.
+void CRYPTO_cfb128_8_encrypt(const uint8_t *in, uint8_t *out, size_t len,
+ const void *key, uint8_t ivec[16], unsigned *num,
+ int enc, block128_f block);
+
+// CRYPTO_cfb128_1_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes
+// from |in| to |out| using |block| in CFB-1 mode. Prior to the first call
+// |num| should be set to zero.
+void CRYPTO_cfb128_1_encrypt(const uint8_t *in, uint8_t *out, size_t bits,
+ const void *key, uint8_t ivec[16], unsigned *num,
+ int enc, block128_f block);
+
+size_t CRYPTO_cts128_encrypt_block(const uint8_t *in, uint8_t *out, size_t len,
+ const void *key, uint8_t ivec[16],
+ block128_f block);
+
+
+// POLYVAL.
+//
+// POLYVAL is a polynomial authenticator that operates over a field very
+// similar to the one that GHASH uses. See
+// https://tools.ietf.org/html/draft-irtf-cfrg-gcmsiv-02#section-3.
+
+typedef union {
+ uint64_t u[2];
+ uint8_t c[16];
+} polyval_block;
+
+struct polyval_ctx {
+ // Note that the order of |S|, |H| and |Htable| is fixed by the MOVBE-based,
+ // x86-64, GHASH assembly.
+ polyval_block S;
+ u128 H;
+ u128 Htable[16];
+ gmult_func gmult;
+ ghash_func ghash;
+};
+
+// CRYPTO_POLYVAL_init initialises |ctx| using |key|.
+void CRYPTO_POLYVAL_init(struct polyval_ctx *ctx, const uint8_t key[16]);
+
+// CRYPTO_POLYVAL_update_blocks updates the accumulator in |ctx| given the
+// blocks from |in|. Only a whole number of blocks can be processed so |in_len|
+// must be a multiple of 16.
+void CRYPTO_POLYVAL_update_blocks(struct polyval_ctx *ctx, const uint8_t *in,
+ size_t in_len);
+
+// CRYPTO_POLYVAL_finish writes the accumulator from |ctx| to |out|.
+void CRYPTO_POLYVAL_finish(const struct polyval_ctx *ctx, uint8_t out[16]);
+
+
+#if defined(__cplusplus)
+} // extern C
+#endif
+
+#endif // OPENSSL_HEADER_MODES_INTERNAL_H
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