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| /* | ||
| * cifra - embedded cryptography library | ||
| * Written in 2014 by Joseph Birr-Pixton <[email protected]> | ||
| * | ||
| * To the extent possible under law, the author(s) have dedicated all | ||
| * copyright and related and neighboring rights to this software to the | ||
| * public domain worldwide. This software is distributed without any | ||
| * warranty. | ||
| * | ||
| * You should have received a copy of the CC0 Public Domain Dedication | ||
| * along with this software. If not, see | ||
| * <http://creativecommons.org/publicdomain/zero/1.0/>. | ||
| */ | ||
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| #ifndef SHA2_H | ||
| #define SHA2_H | ||
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| #include <stddef.h> | ||
| #include <stdint.h> | ||
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| #include "chash.h" | ||
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| /** | ||
| * SHA224/SHA256 | ||
| * ============= | ||
| */ | ||
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| /* .. c:macro:: CF_SHA224_HASHSZ | ||
| * The output size of SHA224: 28 bytes. */ | ||
| #define CF_SHA224_HASHSZ 28 | ||
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| /* .. c:macro:: CF_SHA224_BLOCKSZ | ||
| * The block size of SHA224: 64 bytes. */ | ||
| #define CF_SHA224_BLOCKSZ 64 | ||
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| /* .. c:macro:: CF_SHA256_HASHSZ | ||
| * The output size of SHA256: 32 bytes. */ | ||
| #define CF_SHA256_HASHSZ 32 | ||
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| /* .. c:macro:: CF_SHA256_BLOCKSZ | ||
| * The block size of SHA256: 64 bytes. */ | ||
| #define CF_SHA256_BLOCKSZ 64 | ||
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| /* .. c:type:: cf_sha256_context | ||
| * Incremental SHA256 hashing context. | ||
| * | ||
| * .. c:member:: cf_sha256_context.H | ||
| * Intermediate values. | ||
| * | ||
| * .. c:member:: cf_sha256_context.partial | ||
| * Unprocessed input. | ||
| * | ||
| * .. c:member:: cf_sha256_context.npartial | ||
| * Number of bytes of unprocessed input. | ||
| * | ||
| * .. c:member:: cf_sha256_context.blocks | ||
| * Number of full blocks processed. | ||
| */ | ||
| typedef struct | ||
| { | ||
| uint32_t H[8]; /* State. */ | ||
| uint8_t partial[CF_SHA256_BLOCKSZ]; /* Partial block of input. */ | ||
| uint32_t blocks; /* Number of full blocks processed into H. */ | ||
| size_t npartial; /* Number of bytes in prefix of partial. */ | ||
| } cf_sha256_context; | ||
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| /* .. c:function:: $DECL | ||
| * Sets up `ctx` ready to hash a new message. | ||
| */ | ||
| extern void cf_sha256_init(cf_sha256_context *ctx); | ||
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| /* .. c:function:: $DECL | ||
| * Hashes `nbytes` at `data`. Copies the data if there isn't enough to make | ||
| * a full block. | ||
| */ | ||
| extern void cf_sha256_update(cf_sha256_context *ctx, const void *data, size_t nbytes); | ||
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| /* .. c:function:: $DECL | ||
| * Finishes the hash operation, writing `CF_SHA256_HASHSZ` bytes to `hash`. | ||
| * | ||
| * This leaves `ctx` unchanged. | ||
| */ | ||
| extern void cf_sha256_digest(const cf_sha256_context *ctx, uint8_t hash[CF_SHA256_HASHSZ]); | ||
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| /* .. c:function:: $DECL | ||
| * Finishes the hash operation, writing `CF_SHA256_HASHSZ` bytes to `hash`. | ||
| * | ||
| * This destroys `ctx`, but uses less stack than :c:func:`cf_sha256_digest`. | ||
| */ | ||
| extern void cf_sha256_digest_final(cf_sha256_context *ctx, uint8_t hash[CF_SHA256_HASHSZ]); | ||
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| /* .. c:function:: $DECL | ||
| * Sets up `ctx` ready to hash a new message. | ||
| * | ||
| * nb. SHA224 uses SHA256's underlying types. | ||
| */ | ||
| extern void cf_sha224_init(cf_sha256_context *ctx); | ||
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| /* .. c:function:: $DECL | ||
| * Hashes `nbytes` at `data`. Copies the data if there isn't enough to make | ||
| * a full block. | ||
| */ | ||
| extern void cf_sha224_update(cf_sha256_context *ctx, const void *data, size_t nbytes); | ||
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| /* .. c:function:: $DECL | ||
| * Finishes the hash operation, writing `CF_SHA224_HASHSZ` bytes to `hash`. | ||
| * | ||
| * This leaves `ctx` unchanged. | ||
| */ | ||
| extern void cf_sha224_digest(const cf_sha256_context *ctx, uint8_t hash[CF_SHA224_HASHSZ]); | ||
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| /* .. c:function:: $DECL | ||
| * Finishes the hash operation, writing `CF_SHA224_HASHSZ` bytes to `hash`. | ||
| * | ||
| * This destroys `ctx`, but uses less stack than :c:func:`cf_sha224_digest`. | ||
| */ | ||
| extern void cf_sha224_digest_final(cf_sha256_context *ctx, uint8_t hash[CF_SHA224_HASHSZ]); | ||
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| /* .. c:var:: cf_sha224 | ||
| * Abstract interface to SHA224. See :c:type:`cf_chash` for more information. | ||
| */ | ||
| extern const cf_chash cf_sha224; | ||
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| /* .. c:var:: cf_sha256 | ||
| * Abstract interface to SHA256. See :c:type:`cf_chash` for more information. | ||
| */ | ||
| extern const cf_chash cf_sha256; | ||
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| /** | ||
| * SHA384/SHA512 | ||
| * ============= | ||
| */ | ||
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| /* .. c:macro:: CF_SHA384_HASHSZ | ||
| * The output size of SHA384: 48 bytes. */ | ||
| #define CF_SHA384_HASHSZ 48 | ||
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| /* .. c:macro:: CF_SHA384_BLOCKSZ | ||
| * The block size of SHA384: 128 bytes. */ | ||
| #define CF_SHA384_BLOCKSZ 128 | ||
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| /* .. c:macro:: CF_SHA512_HASHSZ | ||
| * The output size of SHA512: 64 bytes. */ | ||
| #define CF_SHA512_HASHSZ 64 | ||
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| /* .. c:macro:: CF_SHA512_BLOCKSZ | ||
| * The block size of SHA512: 128 bytes. */ | ||
| #define CF_SHA512_BLOCKSZ 128 | ||
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| /* .. c:type:: cf_sha512_context | ||
| * Incremental SHA512 hashing context. | ||
| * | ||
| * .. c:member:: cf_sha512_context.H | ||
| * Intermediate values. | ||
| * | ||
| * .. c:member:: cf_sha512_context.partial | ||
| * Unprocessed input. | ||
| * | ||
| * .. c:member:: cf_sha512_context.npartial | ||
| * Number of bytes of unprocessed input. | ||
| * | ||
| * .. c:member:: cf_sha512_context.blocks | ||
| * Number of full blocks processed. | ||
| */ | ||
| typedef struct | ||
| { | ||
| uint64_t H[8]; | ||
| uint8_t partial[CF_SHA512_BLOCKSZ]; | ||
| uint32_t blocks; | ||
| size_t npartial; | ||
| } cf_sha512_context; | ||
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| /* .. c:function:: $DECL | ||
| * Sets up `ctx` ready to hash a new message. | ||
| */ | ||
| extern void cf_sha512_init(cf_sha512_context *ctx); | ||
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| /* .. c:function:: $DECL | ||
| * Hashes `nbytes` at `data`. Copies the data if there isn't enough to make | ||
| * a full block. | ||
| */ | ||
| extern void cf_sha512_update(cf_sha512_context *ctx, const void *data, size_t nbytes); | ||
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| /* .. c:function:: $DECL | ||
| * Finishes the hash operation, writing `CF_SHA512_HASHSZ` bytes to `hash`. | ||
| * | ||
| * This leaves `ctx` unchanged. | ||
| */ | ||
| extern void cf_sha512_digest(const cf_sha512_context *ctx, uint8_t hash[CF_SHA512_HASHSZ]); | ||
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| /* .. c:function:: $DECL | ||
| * Finishes the hash operation, writing `CF_SHA512_HASHSZ` bytes to `hash`. | ||
| * | ||
| * This destroys `ctx`, but uses less stack than :c:func:`cf_sha512_digest`. | ||
| */ | ||
| extern void cf_sha512_digest_final(cf_sha512_context *ctx, uint8_t hash[CF_SHA512_HASHSZ]); | ||
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| /* .. c:function:: $DECL | ||
| * Sets up `ctx` ready to hash a new message. | ||
| * | ||
| * nb. SHA384 uses SHA512's underlying types. | ||
| */ | ||
| extern void cf_sha384_init(cf_sha512_context *ctx); | ||
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| /* .. c:function:: $DECL | ||
| * Hashes `nbytes` at `data`. Copies the data if there isn't enough to make | ||
| * a full block. | ||
| */ | ||
| extern void cf_sha384_update(cf_sha512_context *ctx, const void *data, size_t nbytes); | ||
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| /* .. c:function:: $DECL | ||
| * Finishes the hash operation, writing `CF_SHA384_HASHSZ` bytes to `hash`. | ||
| * | ||
| * This leaves `ctx` unchanged. | ||
| */ | ||
| extern void cf_sha384_digest(const cf_sha512_context *ctx, uint8_t hash[CF_SHA384_HASHSZ]); | ||
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| /* .. c:function:: $DECL | ||
| * Finishes the hash operation, writing `CF_SHA384_HASHSZ` bytes to `hash`. | ||
| * | ||
| * This destroys `ctx`, but uses less stack than :c:func:`cf_sha384_digest`. | ||
| */ | ||
| extern void cf_sha384_digest_final(cf_sha512_context *ctx, uint8_t hash[CF_SHA384_HASHSZ]); | ||
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| /* .. c:var:: cf_sha384 | ||
| * Abstract interface to SHA384. See :c:type:`cf_chash` for more information. | ||
| */ | ||
| extern const cf_chash cf_sha384; | ||
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| /* .. c:var:: cf_sha512 | ||
| * Abstract interface to SHA512. See :c:type:`cf_chash` for more information. | ||
| */ | ||
| extern const cf_chash cf_sha512; | ||
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| #endif |
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