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nanahi
58ee11c58a
This util function uses the generic libavutil hash API to hash any data with the specified algorithm to a bstr. It deduplicates multiple hash routines used in mpv.
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <libavutil/hash.h>
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#include "common/common.h"
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#include "misc/hash.h"
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bstr mp_hash_to_bstr(void *talloc_ctx, const uint8_t *data, size_t len, const char *algorithm)
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{
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struct AVHashContext *ctx = NULL;
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mp_require(av_hash_alloc(&ctx, algorithm) == 0);
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int size = av_hash_get_size(ctx);
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uint8_t hash[AV_HASH_MAX_SIZE] = {0};
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av_hash_init(ctx);
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av_hash_update(ctx, data, len);
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av_hash_final(ctx, hash);
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av_hash_freep(&ctx);
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bstr ret = {0};
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for (int n = 0; n < size; n++)
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bstr_xappend_asprintf(talloc_ctx, &ret, "%02X", hash[n]);
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return ret;
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}
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