47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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#pragma once
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// Derived from the "RSA Data Security, Inc. MD5 Message-Digest Algorithm":
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// src: https://github.com/freebsd/freebsd-src/blob/release/14.2.0/sys/kern/md5c.c
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#include <cstdint>
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#define MD5_BLOCK_LENGTH 64
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#define MD5_DIGEST_LENGTH 16
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#define MD5_DIGEST_STRING_LENGTH (MD5_DIGEST_LENGTH * 2 + 1)
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/* MD5 context. */
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struct MD5_CTX {
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uint64_t count; /* number of bits, modulo 2^64 (lsb first) */
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uint32_t state[4]; /* state (ABCD) */
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unsigned char buffer[64]; /* input buffer */
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};
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/* MD5 initialization. Begins an MD5 operation, writing a new context. */
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inline void md5_init(MD5_CTX* context) {
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context->count = 0;
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/* Load magic initialization constants. */
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context->state[0] = 0x67452301;
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context->state[1] = 0xefcdab89;
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context->state[2] = 0x98badcfe;
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context->state[3] = 0x10325476;
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}
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void md5_update(MD5_CTX* ctx, const uint8_t* in, size_t len);
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void md5_final(MD5_CTX* ctx, uint8_t* digest);
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inline void md5(uint8_t* digest, const uint8_t* in, const size_t len) {
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MD5_CTX ctx;
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md5_init(&ctx);
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md5_update(&ctx, in, len);
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md5_final(&ctx, digest);
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}
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inline void md5(uint8_t* digest, const uint8_t* in, const size_t len, const uint8_t* in2, size_t len2) {
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MD5_CTX ctx;
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md5_init(&ctx);
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md5_update(&ctx, in, len);
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md5_update(&ctx, in2, len2);
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md5_final(&ctx, digest);
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}
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