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https://github.com/tillitis/tillitis-key1.git
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6d08a82c05
Instead of allocating the blake2s_ctx in the blake2s() function we pass it as a pointer as an argument to be able to better control where the variable is in memory.
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
// blake2s.h
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// BLAKE2s Hashing Context and API Prototypes
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#ifndef BLAKE2S_H
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#define BLAKE2S_H
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#include "../types.h"
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// state context
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typedef struct {
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uint8_t b[64]; // input buffer
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uint32_t h[8]; // chained state
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uint32_t t[2]; // total number of bytes
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size_t c; // pointer for b[]
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size_t outlen; // digest size
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} blake2s_ctx;
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// Initialize the hashing context "ctx" with optional key "key".
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// 1 <= outlen <= 32 gives the digest size in bytes.
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// Secret key (also <= 32 bytes) is optional (keylen = 0).
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int blake2s_init(blake2s_ctx *ctx, size_t outlen,
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const void *key, size_t keylen); // secret key
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// Add "inlen" bytes from "in" into the hash.
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void blake2s_update(blake2s_ctx *ctx, // context
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const void *in, size_t inlen); // data to be hashed
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// Generate the message digest (size given in init).
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// Result placed in "out".
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void blake2s_final(blake2s_ctx *ctx, void *out);
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// All-in-one convenience function.
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int blake2s(void *out, size_t outlen, // return buffer for digest
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const void *key, size_t keylen, // optional secret key
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const void *in, size_t inlen, // data to be hashed
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blake2s_ctx *ctx);
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#endif
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