/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 *

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 *

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 *

 * 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 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 acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 *

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS 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 AUTHOR OR 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.

 *

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.] */

#ifndef OPENSSL_HEADER_CIPHER_EXTRA_INTERNAL_H

#define OPENSSL_HEADER_CIPHER_EXTRA_INTERNAL_H

#include <assert.h>

#include <stdlib.h>

#include <openssl/base.h>

#include "../internal.h"

#if defined(__cplusplus)

extern "C" {

#endif

// EVP_tls_cbc_get_padding determines the padding from the decrypted, TLS, CBC

// record in |in|. This decrypted record should not include any "decrypted"

// explicit IV. If the record is publicly invalid, it returns zero. Otherwise,

// it returns one and sets |*out_padding_ok| to all ones (0xfff..f) if the

// padding is valid and zero otherwise. It then sets |*out_len| to the length

// with the padding removed or |in_len| if invalid.

//

// If the function returns one, it runs in time independent of the contents of

// |in|. It is also guaranteed that |*out_len| >= |mac_size|, satisfying

// |EVP_tls_cbc_copy_mac|'s precondition.

int EVP_tls_cbc_remove_padding(crypto_word_t *out_padding_ok, size_t *out_len,

                               const uint8_t *in, size_t in_len,

                               size_t block_size, size_t mac_size);

// EVP_tls_cbc_copy_mac copies |md_size| bytes from the end of the first

// |in_len| bytes of |in| to |out| in constant time (independent of the concrete

// value of |in_len|, which may vary within a 256-byte window). |in| must point

// to a buffer of |orig_len| bytes.

//

// On entry:

//   orig_len >= in_len >= md_size

//   md_size <= EVP_MAX_MD_SIZE

void EVP_tls_cbc_copy_mac(uint8_t *out, size_t md_size, const uint8_t *in,

                          size_t in_len, size_t orig_len);

// EVP_tls_cbc_record_digest_supported returns 1 iff |md| is a hash function

// which EVP_tls_cbc_digest_record supports.

int EVP_tls_cbc_record_digest_supported(const EVP_MD *md);

// EVP_sha1_final_with_secret_suffix computes the result of hashing |len| bytes

// from |in| to |ctx| and writes the resulting hash to |out|. |len| is treated

// as secret and must be at most |max_len|, which is treated as public. |in|

// must point to a buffer of at least |max_len| bytes. It returns one on success

// and zero if inputs are too long.

//

// This function is exported for unit tests.

OPENSSL_EXPORT int EVP_sha1_final_with_secret_suffix(

    SHA_CTX *ctx, uint8_t out[SHA_DIGEST_LENGTH], const uint8_t *in, size_t len,

    size_t max_len);

// EVP_sha256_final_with_secret_suffix acts like

// |EVP_sha1_final_with_secret_suffix|, but for SHA-256.

//

// This function is exported for unit tests.

OPENSSL_EXPORT int EVP_sha256_final_with_secret_suffix(

    SHA256_CTX *ctx, uint8_t out[SHA256_DIGEST_LENGTH], const uint8_t *in,

    size_t len, size_t max_len);

// EVP_tls_cbc_digest_record computes the MAC of a decrypted, padded TLS

// record.

//

//   md: the hash function used in the HMAC.

//     EVP_tls_cbc_record_digest_supported must return true for this hash.

//   md_out: the digest output. At most EVP_MAX_MD_SIZE bytes will be written.

//   md_out_size: the number of output bytes is written here.

//   header: the 13-byte, TLS record header.

//   data: the record data itself

//   data_size: the secret, reported length of the data once the padding and MAC

//     have been removed.

//   data_plus_mac_plus_padding_size: the public length of the whole

//     record, including padding.

//

// On entry: by virtue of having been through one of the remove_padding

// functions, above, we know that data_plus_mac_size is large enough to contain

// a padding byte and MAC. (If the padding was invalid, it might contain the

// padding too. )

int EVP_tls_cbc_digest_record(const EVP_MD *md, uint8_t *md_out,

                              size_t *md_out_size, const uint8_t header[13],

                              const uint8_t *data, size_t data_size,

                              size_t data_plus_mac_plus_padding_size,

                              const uint8_t *mac_secret,

                              unsigned mac_secret_length);

#define POLY1305_TAG_LEN 16

// For convenience (the x86_64 calling convention allows only six parameters in

// registers), the final parameter for the assembly functions is both an input

// and output parameter.

union chacha20_poly1305_open_data {

  struct {

    alignas(16) uint8_t key[32];

    uint32_t counter;

    uint8_t nonce[12];

  } in;

  struct {

    uint8_t tag[POLY1305_TAG_LEN];

  } out;

};

union chacha20_poly1305_seal_data {

  struct {

    alignas(16) uint8_t key[32];

    uint32_t counter;

    uint8_t nonce[12];

    const uint8_t *extra_ciphertext;

    size_t extra_ciphertext_len;

  } in;

  struct {

    uint8_t tag[POLY1305_TAG_LEN];

  } out;

};

#if (defined(OPENSSL_X86_64) || defined(OPENSSL_AARCH64)) &&  \

    !defined(OPENSSL_NO_ASM)

static_assert(sizeof(union chacha20_poly1305_open_data) == 48,

              "wrong chacha20_poly1305_open_data size");

static_assert(sizeof(union chacha20_poly1305_seal_data) == 48 + 8 + 8,

              "wrong chacha20_poly1305_seal_data size");

OPENSSL_INLINE int chacha20_poly1305_asm_capable(void) {

#if defined(OPENSSL_X86_64)

  return CRYPTO_is_SSE4_1_capable();

#elif defined(OPENSSL_AARCH64)

  return CRYPTO_is_NEON_capable();

#endif

}

// chacha20_poly1305_open is defined in chacha20_poly1305_*.pl. It decrypts

// |plaintext_len| bytes from |ciphertext| and writes them to |out_plaintext|.

// Additional input parameters are passed in |aead_data->in|. On exit, it will

// write calculated tag value to |aead_data->out.tag|, which the caller must

// check.

#if defined(OPENSSL_X86_64)

extern void chacha20_poly1305_open_nohw(

    uint8_t *out_plaintext, const uint8_t *ciphertext, size_t plaintext_len,

    const uint8_t *ad, size_t ad_len, union chacha20_poly1305_open_data *data);

extern void chacha20_poly1305_open_avx2(

    uint8_t *out_plaintext, const uint8_t *ciphertext, size_t plaintext_len,

    const uint8_t *ad, size_t ad_len, union chacha20_poly1305_open_data *data);

OPENSSL_INLINE void chacha20_poly1305_open(uint8_t *out_plaintext,

                                   const uint8_t *ciphertext,

                                   size_t plaintext_len, const uint8_t *ad,

                                   size_t ad_len,

                                   union chacha20_poly1305_open_data *data) {

  if (CRYPTO_is_AVX2_capable() && CRYPTO_is_BMI2_capable()) {

    chacha20_poly1305_open_avx2(out_plaintext, ciphertext, plaintext_len, ad,

                                ad_len, data);

  } else {

    chacha20_poly1305_open_nohw(out_plaintext, ciphertext, plaintext_len, ad,

                                ad_len, data);

  }

}

#else

extern void chacha20_poly1305_open(uint8_t *out_plaintext,

                                   const uint8_t *ciphertext,

                                   size_t plaintext_len, const uint8_t *ad,

                                   size_t ad_len,

                                   union chacha20_poly1305_open_data *data);

#endif

// chacha20_poly1305_open is defined in chacha20_poly1305_*.pl. It encrypts

// |plaintext_len| bytes from |plaintext| and writes them to |out_ciphertext|.

// Additional input parameters are passed in |aead_data->in|. The calculated tag

// value is over the computed ciphertext concatenated with |extra_ciphertext|

// and written to |aead_data->out.tag|.

#if defined(OPENSSL_X86_64)

extern void chacha20_poly1305_seal_nohw(

    uint8_t *out_ciphertext, const uint8_t *plaintext, size_t plaintext_len,

    const uint8_t *ad, size_t ad_len, union chacha20_poly1305_seal_data *data);

extern void chacha20_poly1305_seal_avx2(

    uint8_t *out_ciphertext, const uint8_t *plaintext, size_t plaintext_len,

    const uint8_t *ad, size_t ad_len, union chacha20_poly1305_seal_data *data);

OPENSSL_INLINE void chacha20_poly1305_seal(

    uint8_t *out_ciphertext, const uint8_t *plaintext, size_t plaintext_len,

    const uint8_t *ad, size_t ad_len, union chacha20_poly1305_seal_data *data) {

  if (CRYPTO_is_AVX2_capable() && CRYPTO_is_BMI2_capable()) {

    chacha20_poly1305_seal_avx2(out_ciphertext, plaintext, plaintext_len, ad,

                                ad_len, data);

  } else {

    chacha20_poly1305_seal_nohw(out_ciphertext, plaintext, plaintext_len, ad,

                                ad_len, data);

  }

}

#else

extern void chacha20_poly1305_seal(uint8_t *out_ciphertext,

                                   const uint8_t *plaintext,

                                   size_t plaintext_len, const uint8_t *ad,

                                   size_t ad_len,

                                   union chacha20_poly1305_seal_data *data);

#endif

#else

OPENSSL_INLINE int chacha20_poly1305_asm_capable(void) { return 0; }

e_chacha20poly1305.c:chacha20_poly1305_asm_capable

Line

Count

Source

256

172

OPENSSL_INLINE int chacha20_poly1305_asm_capable(void) { return 0; }

Unexecuted instantiation: e_des.c:chacha20_poly1305_asm_capable

Unexecuted instantiation: e_tls.c:chacha20_poly1305_asm_capable

Unexecuted instantiation: tls_cbc.c:chacha20_poly1305_asm_capable

OPENSSL_INLINE void chacha20_poly1305_open(uint8_t *out_plaintext,

                                   const uint8_t *ciphertext,

                                   size_t plaintext_len, const uint8_t *ad,

                                   size_t ad_len,

                                   union chacha20_poly1305_open_data *data) {

  abort();

}

Unexecuted instantiation: e_des.c:chacha20_poly1305_open

Unexecuted instantiation: e_tls.c:chacha20_poly1305_open

Unexecuted instantiation: tls_cbc.c:chacha20_poly1305_open

OPENSSL_INLINE void chacha20_poly1305_seal(uint8_t *out_ciphertext,

                                   const uint8_t *plaintext,

                                   size_t plaintext_len, const uint8_t *ad,

                                   size_t ad_len,

                                   union chacha20_poly1305_seal_data *data) {

  abort();

}

Unexecuted instantiation: e_chacha20poly1305.c:chacha20_poly1305_seal

Unexecuted instantiation: e_des.c:chacha20_poly1305_seal

Unexecuted instantiation: e_tls.c:chacha20_poly1305_seal

Unexecuted instantiation: tls_cbc.c:chacha20_poly1305_seal

#endif

#if defined(__cplusplus)

}  // extern C

#endif

#endif  // OPENSSL_HEADER_CIPHER_EXTRA_INTERNAL_H