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58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
/*
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* Argon2 reference source code package - reference C implementations
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*
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* Copyright 2015
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* Daniel Dinu, Dmitry Khovratovich, Jean-Philippe Aumasson, and Samuel Neves
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*
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* You may use this work under the terms of a Creative Commons CC0 1.0
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* License/Waiver or the Apache Public License 2.0, at your option. The terms of
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* these licenses can be found at:
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*
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* - CC0 1.0 Universal : https://creativecommons.org/publicdomain/zero/1.0
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* - Apache 2.0 : https://www.apache.org/licenses/LICENSE-2.0
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*
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* You should have received a copy of both of these licenses along with this
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* software. If not, they may be obtained at the above URLs.
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*/
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#ifndef ENCODING_H
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#define ENCODING_H
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#include "argon2.h"
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#define ARGON2_MAX_DECODED_LANES UINT32_C(255)
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#define ARGON2_MIN_DECODED_SALT_LEN UINT32_C(8)
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#define ARGON2_MIN_DECODED_OUT_LEN UINT32_C(12)
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/*
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* encode an Argon2 hash string into the provided buffer. 'dst_len'
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* contains the size, in characters, of the 'dst' buffer; if 'dst_len'
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* is less than the number of required characters (including the
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* terminating 0), then this function returns ARGON2_ENCODING_ERROR.
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*
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* on success, ARGON2_OK is returned.
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*/
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int encode_string(char *dst, size_t dst_len, argon2_context *ctx,
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argon2_type type);
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/*
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* Decodes an Argon2 hash string into the provided structure 'ctx'.
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* The only fields that must be set prior to this call are ctx.saltlen and
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* ctx.outlen (which must be the maximal salt and out length values that are
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* allowed), ctx.salt and ctx.out (which must be buffers of the specified
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* length), and ctx.pwd and ctx.pwdlen which must hold a valid password.
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*
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* Invalid input string causes an error. On success, the ctx is valid and all
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* fields have been initialized.
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*
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* Returned value is ARGON2_OK on success, other ARGON2_ codes on error.
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*/
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int decode_string(argon2_context *ctx, const char *str, argon2_type type);
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/* Returns the length of the encoded byte stream with length len */
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size_t b64len(uint32_t len);
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/* Returns the length of the encoded number num */
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size_t numlen(uint32_t num);
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#endif
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