/* Copyright (C) 1995-1998 Eric Young ([email protected]) * All rights reserved. * * This package is an SSL implementation written * by Eric Young ([email protected]). * 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 ([email protected]). * * 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 ([email protected])" * 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 ([email protected])" * * 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 … // 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. chacha20_poly1305_open_data; chacha20_poly1305_seal_data; #if (defined(OPENSSL_X86_64) || defined(OPENSSL_AARCH64)) && \ !defined(OPENSSL_NO_ASM) static_assert; static_assert; OPENSSL_INLINE int chacha20_poly1305_asm_capable(void) { … } // 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. 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); // 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|. 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); #else OPENSSL_INLINE int chacha20_poly1305_asm_capable(void) { return 0; } 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(); } 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(); } #endif #if defined(__cplusplus) } // extern C #endif #endif // OPENSSL_HEADER_CIPHER_EXTRA_INTERNAL_H
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