180 lines
7.9 KiB
C
180 lines
7.9 KiB
C
|
/* 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_BASE64_H
|
||
|
|
#define OPENSSL_HEADER_BASE64_H
|
||
|
|
|
||
|
|
#include <openssl/base.h>
|
||
|
|
|
||
|
|
#if defined(__cplusplus)
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* base64 functions.
|
||
|
|
*
|
||
|
|
* For historical reasons, these functions have the EVP_ prefix but just do
|
||
|
|
* base64 encoding and decoding. */
|
||
|
|
|
||
|
|
|
||
|
|
typedef struct evp_encode_ctx_st EVP_ENCODE_CTX;
|
||
|
|
|
||
|
|
|
||
|
|
/* Encoding */
|
||
|
|
|
||
|
|
/* EVP_EncodeInit initialises |*ctx|, which is typically stack
|
||
|
|
* allocated, for an encoding operation.
|
||
|
|
*
|
||
|
|
* NOTE: The encoding operation breaks its output with newlines every
|
||
|
|
* 64 characters of output (48 characters of input). Use
|
||
|
|
* EVP_EncodeBlock to encode raw base64. */
|
||
|
|
OPENSSL_EXPORT void EVP_EncodeInit(EVP_ENCODE_CTX *ctx);
|
||
|
|
|
||
|
|
/* EVP_EncodeUpdate encodes |in_len| bytes from |in| and writes an encoded
|
||
|
|
* version of them to |out| and sets |*out_len| to the number of bytes written.
|
||
|
|
* Some state may be contained in |ctx| so |EVP_EncodeFinal| must be used to
|
||
|
|
* flush it before using the encoded data. */
|
||
|
|
OPENSSL_EXPORT void EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, uint8_t *out,
|
||
|
|
int *out_len, const uint8_t *in,
|
||
|
|
size_t in_len);
|
||
|
|
|
||
|
|
/* EVP_EncodeFinal flushes any remaining output bytes from |ctx| to |out| and
|
||
|
|
* sets |*out_len| to the number of bytes written. */
|
||
|
|
OPENSSL_EXPORT void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, uint8_t *out,
|
||
|
|
int *out_len);
|
||
|
|
|
||
|
|
/* EVP_EncodeBlock encodes |src_len| bytes from |src| and writes the
|
||
|
|
* result to |dst| with a trailing NUL. It returns the number of bytes
|
||
|
|
* written, not including this trailing NUL. */
|
||
|
|
OPENSSL_EXPORT size_t EVP_EncodeBlock(uint8_t *dst, const uint8_t *src,
|
||
|
|
size_t src_len);
|
||
|
|
|
||
|
|
/* EVP_EncodedLength sets |*out_len| to the number of bytes that will be needed
|
||
|
|
* to call |EVP_EncodeBlock| on an input of length |len|. This includes the
|
||
|
|
* final NUL that |EVP_EncodeBlock| writes. It returns one on success or zero
|
||
|
|
* on error. */
|
||
|
|
OPENSSL_EXPORT int EVP_EncodedLength(size_t *out_len, size_t len);
|
||
|
|
|
||
|
|
|
||
|
|
/* Decoding */
|
||
|
|
|
||
|
|
/* EVP_DecodedLength sets |*out_len| to the maximum number of bytes
|
||
|
|
* that will be needed to call |EVP_DecodeBase64| on an input of
|
||
|
|
* length |len|. */
|
||
|
|
OPENSSL_EXPORT int EVP_DecodedLength(size_t *out_len, size_t len);
|
||
|
|
|
||
|
|
/* EVP_DecodeBase64 decodes |in_len| bytes from base64 and writes
|
||
|
|
* |*out_len| bytes to |out|. |max_out| is the size of the output
|
||
|
|
* buffer. If it is not enough for the maximum output size, the
|
||
|
|
* operation fails. */
|
||
|
|
OPENSSL_EXPORT int EVP_DecodeBase64(uint8_t *out, size_t *out_len,
|
||
|
|
size_t max_out, const uint8_t *in,
|
||
|
|
size_t in_len);
|
||
|
|
|
||
|
|
/* EVP_DecodeInit initialises |*ctx|, which is typically stack allocated, for
|
||
|
|
* a decoding operation.
|
||
|
|
*
|
||
|
|
* TODO(davidben): This isn't a straight-up base64 decode either. Document
|
||
|
|
* and/or fix exactly what's going on here; maximum line length and such. */
|
||
|
|
OPENSSL_EXPORT void EVP_DecodeInit(EVP_ENCODE_CTX *ctx);
|
||
|
|
|
||
|
|
/* EVP_DecodeUpdate decodes |in_len| bytes from |in| and writes the decoded
|
||
|
|
* data to |out| and sets |*out_len| to the number of bytes written. Some state
|
||
|
|
* may be contained in |ctx| so |EVP_DecodeFinal| must be used to flush it
|
||
|
|
* before using the encoded data.
|
||
|
|
*
|
||
|
|
* It returns -1 on error, one if a full line of input was processed and zero
|
||
|
|
* if the line was short (i.e. it was the last line). */
|
||
|
|
OPENSSL_EXPORT int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, uint8_t *out,
|
||
|
|
int *out_len, const uint8_t *in,
|
||
|
|
size_t in_len);
|
||
|
|
|
||
|
|
/* EVP_DecodeFinal flushes any remaining output bytes from |ctx| to |out| and
|
||
|
|
* sets |*out_len| to the number of bytes written. It returns one on success
|
||
|
|
* and minus one on error. */
|
||
|
|
OPENSSL_EXPORT int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, uint8_t *out,
|
||
|
|
int *out_len);
|
||
|
|
|
||
|
|
/* Deprecated: EVP_DecodeBlock encodes |src_len| bytes from |src| and
|
||
|
|
* writes the result to |dst|. It returns the number of bytes written
|
||
|
|
* or -1 on error.
|
||
|
|
*
|
||
|
|
* WARNING: EVP_DecodeBlock's return value does not take padding into
|
||
|
|
* account. It also strips leading whitespace and trailing
|
||
|
|
* whitespace. */
|
||
|
|
OPENSSL_EXPORT int EVP_DecodeBlock(uint8_t *dst, const uint8_t *src,
|
||
|
|
size_t src_len);
|
||
|
|
|
||
|
|
|
||
|
|
struct evp_encode_ctx_st {
|
||
|
|
unsigned num; /* number saved in a partial encode/decode */
|
||
|
|
unsigned length; /* The length is either the output line length
|
||
|
|
* (in input bytes) or the shortest input line
|
||
|
|
* length that is ok. Once decoding begins,
|
||
|
|
* the length is adjusted up each time a longer
|
||
|
|
* line is decoded */
|
||
|
|
uint8_t enc_data[80]; /* data to encode */
|
||
|
|
unsigned line_num; /* number read on current line */
|
||
|
|
int expect_nl;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
#if defined(__cplusplus)
|
||
|
|
} /* extern C */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* OPENSSL_HEADER_BASE64_H */
|