/* 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.] */ #include <openssl/base64.h> #include <assert.h> #include <limits.h> #include <string.h> #include "../internal.h" // constant_time_lt_args_8 behaves like |constant_time_lt_8| but takes |uint8_t| // arguments for a slightly simpler implementation. static inline uint8_t constant_time_lt_args_8(uint8_t a, uint8_t b) { … } // constant_time_in_range_8 returns |CONSTTIME_TRUE_8| if |min| <= |a| <= |max| // and |CONSTTIME_FALSE_8| otherwise. static inline uint8_t constant_time_in_range_8(uint8_t a, uint8_t min, uint8_t max) { … } // Encoding. static uint8_t conv_bin2ascii(uint8_t a) { … } static_assert; int EVP_EncodedLength(size_t *out_len, size_t len) { … } EVP_ENCODE_CTX *EVP_ENCODE_CTX_new(void) { … } void EVP_ENCODE_CTX_free(EVP_ENCODE_CTX *ctx) { … } void EVP_EncodeInit(EVP_ENCODE_CTX *ctx) { … } void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, uint8_t *out, int *out_len, const uint8_t *in, size_t in_len) { … } void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, uint8_t *out, int *out_len) { … } size_t EVP_EncodeBlock(uint8_t *dst, const uint8_t *src, size_t src_len) { … } // Decoding. int EVP_DecodedLength(size_t *out_len, size_t len) { … } void EVP_DecodeInit(EVP_ENCODE_CTX *ctx) { … } static uint8_t base64_ascii_to_bin(uint8_t a) { … } // base64_decode_quad decodes a single “quad” (i.e. four characters) of base64 // data and writes up to three bytes to |out|. It sets |*out_num_bytes| to the // number of bytes written, which will be less than three if the quad ended // with padding. It returns one on success or zero on error. static int base64_decode_quad(uint8_t *out, size_t *out_num_bytes, const uint8_t *in) { … } int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, uint8_t *out, int *out_len, const uint8_t *in, size_t in_len) { … } int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, uint8_t *out, int *out_len) { … } int EVP_DecodeBase64(uint8_t *out, size_t *out_len, size_t max_out, const uint8_t *in, size_t in_len) { … } int EVP_DecodeBlock(uint8_t *dst, const uint8_t *src, size_t src_len) { … }