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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/types.h>#include <linux/string.h>
#define SHA3_224_DIGEST_SIZE (224 / 8)#define SHA3_224_BLOCK_SIZE (200 - 2 * SHA3_224_DIGEST_SIZE)#define SHA3_224_EXPORT_SIZE SHA3_STATE_SIZE + SHA3_224_BLOCK_SIZE + 1
#define SHA3_256_DIGEST_SIZE (256 / 8)#define SHA3_256_BLOCK_SIZE (200 - 2 * SHA3_256_DIGEST_SIZE)#define SHA3_256_EXPORT_SIZE SHA3_STATE_SIZE + SHA3_256_BLOCK_SIZE + 1
#define SHA3_384_DIGEST_SIZE (384 / 8)#define SHA3_384_BLOCK_SIZE (200 - 2 * SHA3_384_DIGEST_SIZE)#define SHA3_384_EXPORT_SIZE SHA3_STATE_SIZE + SHA3_384_BLOCK_SIZE + 1
#define SHA3_512_DIGEST_SIZE (512 / 8)#define SHA3_512_BLOCK_SIZE (200 - 2 * SHA3_512_DIGEST_SIZE)#define SHA3_512_EXPORT_SIZE SHA3_STATE_SIZE + SHA3_512_BLOCK_SIZE + 1
/* * SHAKE128 and SHAKE256 actually have variable output size, but this is used to * calculate the block size (rate) analogously to the above. */#define SHAKE128_DEFAULT_SIZE (128 / 8)#define SHAKE128_BLOCK_SIZE (200 - 2 * SHAKE128_DEFAULT_SIZE)#define SHAKE256_DEFAULT_SIZE (256 / 8)#define SHAKE256_BLOCK_SIZE (200 - 2 * SHAKE256_DEFAULT_SIZE)
#define SHA3_STATE_SIZE 200
/* * State for the Keccak-f[1600] permutation: 25 64-bit words. * * We usually keep the state words as little-endian, to make absorbing and * squeezing easier. (It means that absorbing and squeezing can just treat the * state as a byte array.) The state words are converted to native-endian only * temporarily by implementations of the permutation that need native-endian * words. Of course, that conversion is a no-op on little-endian machines. */struct sha3_state { union { __le64 words[SHA3_STATE_SIZE / 8]; u8 bytes[SHA3_STATE_SIZE];
u64 native_words[SHA3_STATE_SIZE / 8]; /* see comment above */ };};
/* Internal context, shared by the digests (SHA3-*) and the XOFs (SHAKE*) */struct __sha3_ctx { struct sha3_state state; u8 digest_size; /* Digests only: the digest size in bytes */ u8 block_size; /* Block size in bytes */ u8 absorb_offset; /* Index of next state byte to absorb into */ u8 squeeze_offset; /* XOFs only: index of next state byte to extract */};
void __sha3_update(struct __sha3_ctx *ctx, const u8 *in, size_t in_len);
/** * struct sha3_ctx - Context for SHA3-224, SHA3-256, SHA3-384, or SHA3-512 * @ctx: private */struct sha3_ctx { struct __sha3_ctx ctx;};
/** * sha3_zeroize_ctx() - Zeroize a SHA-3 context * @ctx: The context to zeroize * * This is already called by sha3_final(). Call this explicitly when abandoning * a context without calling sha3_final(). */static inline void sha3_zeroize_ctx(struct sha3_ctx *ctx){ memzero_explicit(ctx, sizeof(*ctx));}
/** * struct shake_ctx - Context for SHAKE128 or SHAKE256 * @ctx: private */struct shake_ctx { struct __sha3_ctx ctx;};
/** * shake_zeroize_ctx() - Zeroize a SHAKE context * @ctx: The context to zeroize * * Call this after the last squeeze. */static inline void shake_zeroize_ctx(struct shake_ctx *ctx){ memzero_explicit(ctx, sizeof(*ctx));}
/** * sha3_224_init() - Initialize a context for SHA3-224 * @ctx: The context to initialize * * This begins a new SHA3-224 message digest computation. * * Context: Any context. */static inline void sha3_224_init(struct sha3_ctx *ctx){ *ctx = (struct sha3_ctx){ .ctx.digest_size = SHA3_224_DIGEST_SIZE, .ctx.block_size = SHA3_224_BLOCK_SIZE, };}
/** * sha3_256_init() - Initialize a context for SHA3-256 * @ctx: The context to initialize * * This begins a new SHA3-256 message digest computation. * * Context: Any context. */static inline void sha3_256_init(struct sha3_ctx *ctx){ *ctx = (struct sha3_ctx){ .ctx.digest_size = SHA3_256_DIGEST_SIZE, .ctx.block_size = SHA3_256_BLOCK_SIZE, };}
/** * sha3_384_init() - Initialize a context for SHA3-384 * @ctx: The context to initialize * * This begins a new SHA3-384 message digest computation. * * Context: Any context. */static inline void sha3_384_init(struct sha3_ctx *ctx){ *ctx = (struct sha3_ctx){ .ctx.digest_size = SHA3_384_DIGEST_SIZE, .ctx.block_size = SHA3_384_BLOCK_SIZE, };}
/** * sha3_512_init() - Initialize a context for SHA3-512 * @ctx: The context to initialize * * This begins a new SHA3-512 message digest computation. * * Context: Any context. */static inline void sha3_512_init(struct sha3_ctx *ctx){ *ctx = (struct sha3_ctx){ .ctx.digest_size = SHA3_512_DIGEST_SIZE, .ctx.block_size = SHA3_512_BLOCK_SIZE, };}
/** * sha3_update() - Update a SHA-3 digest context with input data * @ctx: The context to update; must have been initialized * @in: The input data * @in_len: Length of the input data in bytes * * This can be called any number of times to add data to a SHA3-224, SHA3-256, * SHA3-384, or SHA3-512 digest (depending on which init function was called). * * Context: Any context. */static inline void sha3_update(struct sha3_ctx *ctx, const u8 *in, size_t in_len){ __sha3_update(&ctx->ctx, in, in_len);}
/** * sha3_final() - Finish computing a SHA-3 message digest * @ctx: The context to finalize; must have been initialized * @out: (output) The resulting SHA3-224, SHA3-256, SHA3-384, or SHA3-512 * message digest, matching the init function that was called. Note that * the size differs for each one; see SHA3_*_DIGEST_SIZE. * * After finishing, this zeroizes @ctx. So the caller does not need to do it. * * Context: Any context. */void sha3_final(struct sha3_ctx *ctx, u8 *out);
/** * shake128_init() - Initialize a context for SHAKE128 * @ctx: The context to initialize * * This begins a new SHAKE128 extendable-output function (XOF) computation. * * Context: Any context. */static inline void shake128_init(struct shake_ctx *ctx){ *ctx = (struct shake_ctx){ .ctx.block_size = SHAKE128_BLOCK_SIZE, };}
/** * shake256_init() - Initialize a context for SHAKE256 * @ctx: The context to initialize * * This begins a new SHAKE256 extendable-output function (XOF) computation. * * Context: Any context. */static inline void shake256_init(struct shake_ctx *ctx){ *ctx = (struct shake_ctx){ .ctx.block_size = SHAKE256_BLOCK_SIZE, };}
/** * shake_update() - Update a SHAKE context with input data * @ctx: The context to update; must have been initialized * @in: The input data * @in_len: Length of the input data in bytes * * This can be called any number of times to add more input data to SHAKE128 or * SHAKE256. This cannot be called after squeezing has begun. * * Context: Any context. */static inline void shake_update(struct shake_ctx *ctx, const u8 *in, size_t in_len){ __sha3_update(&ctx->ctx, in, in_len);}
/** * shake_squeeze() - Generate output from SHAKE128 or SHAKE256 * @ctx: The context to squeeze; must have been initialized * @out: Where to write the resulting output data * @out_len: The amount of data to extract to @out in bytes * * This may be called multiple times. A number of consecutive squeezes laid * end-to-end will yield the same output as one big squeeze generating the same * total amount of output. More input cannot be provided after squeezing has * begun. After the last squeeze, call shake_zeroize_ctx(). * * Context: Any context. */void shake_squeeze(struct shake_ctx *ctx, u8 *out, size_t out_len);
/** * sha3_224() - Compute SHA3-224 digest in one shot * @in: The input data to be digested * @in_len: Length of the input data in bytes * @out: The buffer into which the digest will be stored * * Convenience function that computes a SHA3-224 digest. Use this instead of * the incremental API if you're able to provide all the input at once. * * Context: Any context. */void sha3_224(const u8 *in, size_t in_len, u8 out[SHA3_224_DIGEST_SIZE]);
/** * sha3_256() - Compute SHA3-256 digest in one shot * @in: The input data to be digested * @in_len: Length of the input data in bytes * @out: The buffer into which the digest will be stored * * Convenience function that computes a SHA3-256 digest. Use this instead of * the incremental API if you're able to provide all the input at once. * * Context: Any context. */void sha3_256(const u8 *in, size_t in_len, u8 out[SHA3_256_DIGEST_SIZE]);
/** * sha3_384() - Compute SHA3-384 digest in one shot * @in: The input data to be digested * @in_len: Length of the input data in bytes * @out: The buffer into which the digest will be stored * * Convenience function that computes a SHA3-384 digest. Use this instead of * the incremental API if you're able to provide all the input at once. * * Context: Any context. */void sha3_384(const u8 *in, size_t in_len, u8 out[SHA3_384_DIGEST_SIZE]);
/** * sha3_512() - Compute SHA3-512 digest in one shot * @in: The input data to be digested * @in_len: Length of the input data in bytes * @out: The buffer into which the digest will be stored * * Convenience function that computes a SHA3-512 digest. Use this instead of * the incremental API if you're able to provide all the input at once. * * Context: Any context. */void sha3_512(const u8 *in, size_t in_len, u8 out[SHA3_512_DIGEST_SIZE]);
/** * shake128() - Compute SHAKE128 in one shot * @in: The input data to be used * @in_len: Length of the input data in bytes * @out: The buffer into which the output will be stored * @out_len: Length of the output to produce in bytes * * Convenience function that computes SHAKE128 in one shot. Use this instead of * the incremental API if you're able to provide all the input at once as well * as receive all the output at once. All output lengths are supported. * * Context: Any context. */void shake128(const u8 *in, size_t in_len, u8 *out, size_t out_len);
/** * shake256() - Compute SHAKE256 in one shot * @in: The input data to be used * @in_len: Length of the input data in bytes * @out: The buffer into which the output will be stored * @out_len: Length of the output to produce in bytes * * Convenience function that computes SHAKE256 in one shot. Use this instead of * the incremental API if you're able to provide all the input at once as well * as receive all the output at once. All output lengths are supported. * * Context: Any context. */void shake256(const u8 *in, size_t in_len, u8 *out, size_t out_len);
#endif /* __CRYPTO_SHA3_H__ */