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#pragma once
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#include <cstdint>
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namespace md5 {
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constexpr uint32_t MD5_A = 0x67452301;
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constexpr uint32_t MD5_B = 0xefcdab89;
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constexpr uint32_t MD5_C = 0x98badcfe;
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constexpr uint32_t MD5_D = 0x10325476;
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struct md5_ctx {
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uint32_t A = MD5_A;
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uint32_t B = MD5_B;
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uint32_t C = MD5_C;
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uint32_t D = MD5_D;
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uint64_t size = 0;
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};
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/// Reset md5 ctx with algorithm constants.
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void md5_reset(md5_ctx *ctx);
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/// Update md5 ctx with specified data, note that `len` is a multiple of 64.
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void md5_update(md5_ctx *ctx, const void *buffer, uint64_t len);
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/// Update and end the md5 hash with the specified data, the value of `len` has no limit.
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void md5_final(md5_ctx *ctx, const void *buffer, uint64_t len);
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} // namespace md5
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