[authen-passphrase-scrypt.git] / scrypt-1.2.1 / libcperciva / alg / sha256.h

#ifndef _SHA256_H_
#define _SHA256_H_

#include <stddef.h>
#include <stdint.h>

/*
 * Use #defines in order to avoid namespace collisions with anyone else's
 * SHA256 code (e.g., the code in OpenSSL).
 */
#define SHA256_Init libcperciva_SHA256_Init
#define SHA256_Update libcperciva_SHA256_Update
#define SHA256_Final libcperciva_SHA256_Final
#define SHA256_Buf libcperciva_SHA256_Buf
#define SHA256_CTX libcperciva_SHA256_CTX
#define HMAC_SHA256_Init libcperciva_HMAC_SHA256_Init
#define HMAC_SHA256_Update libcperciva_HMAC_SHA256_Update
#define HMAC_SHA256_Final libcperciva_HMAC_SHA256_Final
#define HMAC_SHA256_Buf libcperciva_HMAC_SHA256_Buf
#define HMAC_SHA256_CTX libcperciva_HMAC_SHA256_CTX

/* Context structure for SHA256 operations. */
typedef struct {
	uint32_t state[8];
	uint64_t count;
	uint8_t buf[64];
} SHA256_CTX;

/**
 * SHA256_Init(ctx):
 * Initialize the SHA256 context ${ctx}.
 */
void SHA256_Init(SHA256_CTX *);

/**
 * SHA256_Update(ctx, in, len):
 * Input ${len} bytes from ${in} into the SHA256 context ${ctx}.
 */
void SHA256_Update(SHA256_CTX *, const void *, size_t);

/**
 * SHA256_Final(digest, ctx):
 * Output the SHA256 hash of the data input to the context ${ctx} into the
 * buffer ${digest}.
 */
void SHA256_Final(uint8_t[32], SHA256_CTX *);

/**
 * SHA256_Buf(in, len, digest):
 * Compute the SHA256 hash of ${len} bytes from ${in} and write it to ${digest}.
 */
void SHA256_Buf(const void *, size_t, uint8_t[32]);

/* Context structure for HMAC-SHA256 operations. */
typedef struct {
	SHA256_CTX ictx;
	SHA256_CTX octx;
} HMAC_SHA256_CTX;

/**
 * HMAC_SHA256_Init(ctx, K, Klen):
 * Initialize the HMAC-SHA256 context ${ctx} with ${Klen} bytes of key from
 * ${K}.
 */
void HMAC_SHA256_Init(HMAC_SHA256_CTX *, const void *, size_t);

/**
 * HMAC_SHA256_Update(ctx, in, len):
 * Input ${len} bytes from ${in} into the HMAC-SHA256 context ${ctx}.
 */
void HMAC_SHA256_Update(HMAC_SHA256_CTX *, const void *, size_t);

/**
 * HMAC_SHA256_Final(digest, ctx):
 * Output the HMAC-SHA256 of the data input to the context ${ctx} into the
 * buffer ${digest}.
 */
void HMAC_SHA256_Final(uint8_t[32], HMAC_SHA256_CTX *);

/**
 * HMAC_SHA256_Buf(K, Klen, in, len, digest):
 * Compute the HMAC-SHA256 of ${len} bytes from ${in} using the key ${K} of
 * length ${Klen}, and write the result to ${digest}.
 */
void HMAC_SHA256_Buf(const void *, size_t, const void *, size_t, uint8_t[32]);

/**
 * PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen):
 * Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and
 * write the output to buf.  The value dkLen must be at most 32 * (2^32 - 1).
 */
void PBKDF2_SHA256(const uint8_t *, size_t, const uint8_t *, size_t,
    uint64_t, uint8_t *, size_t);

#endif /* !_SHA256_H_ */
Commit	Line	Data
0c1f3509 MG	1	#ifndef _SHA256_H_
	2	#define _SHA256_H_
	3
	4	#include <stddef.h>
	5	#include <stdint.h>
	6
	7	/*
	8	* Use #defines in order to avoid namespace collisions with anyone else's
	9	* SHA256 code (e.g., the code in OpenSSL).
	10	*/
	11	#define SHA256_Init libcperciva_SHA256_Init
	12	#define SHA256_Update libcperciva_SHA256_Update
	13	#define SHA256_Final libcperciva_SHA256_Final
	14	#define SHA256_Buf libcperciva_SHA256_Buf
	15	#define SHA256_CTX libcperciva_SHA256_CTX
	16	#define HMAC_SHA256_Init libcperciva_HMAC_SHA256_Init
	17	#define HMAC_SHA256_Update libcperciva_HMAC_SHA256_Update
	18	#define HMAC_SHA256_Final libcperciva_HMAC_SHA256_Final
	19	#define HMAC_SHA256_Buf libcperciva_HMAC_SHA256_Buf
	20	#define HMAC_SHA256_CTX libcperciva_HMAC_SHA256_CTX
	21
	22	/* Context structure for SHA256 operations. */
	23	typedef struct {
	24	uint32_t state[8];
	25	uint64_t count;
	26	uint8_t buf[64];
	27	} SHA256_CTX;
	28
	29	/**
	30	* SHA256_Init(ctx):
	31	* Initialize the SHA256 context ${ctx}.
	32	*/
	33	void SHA256_Init(SHA256_CTX *);
	34
	35	/**
	36	* SHA256_Update(ctx, in, len):
	37	* Input ${len} bytes from ${in} into the SHA256 context ${ctx}.
	38	*/
	39	void SHA256_Update(SHA256_CTX , const void , size_t);
	40
	41	/**
	42	* SHA256_Final(digest, ctx):
	43	* Output the SHA256 hash of the data input to the context ${ctx} into the
	44	* buffer ${digest}.
	45	*/
	46	void SHA256_Final(uint8_t[32], SHA256_CTX *);
	47
	48	/**
	49	* SHA256_Buf(in, len, digest):
	50	* Compute the SHA256 hash of ${len} bytes from ${in} and write it to ${digest}.
	51	*/
	52	void SHA256_Buf(const void *, size_t, uint8_t[32]);
	53
	54	/* Context structure for HMAC-SHA256 operations. */
	55	typedef struct {
	56	SHA256_CTX ictx;
	57	SHA256_CTX octx;
	58	} HMAC_SHA256_CTX;
	59
	60	/**
	61	* HMAC_SHA256_Init(ctx, K, Klen):
	62	* Initialize the HMAC-SHA256 context ${ctx} with ${Klen} bytes of key from
	63	* ${K}.
	64	*/
65	void HMAC_SHA256_Init(HMAC_SHA256_CTX , const void , size_t);
66
67	/**
68	* HMAC_SHA256_Update(ctx, in, len):
69	* Input ${len} bytes from ${in} into the HMAC-SHA256 context ${ctx}.
70	*/
71	void HMAC_SHA256_Update(HMAC_SHA256_CTX , const void , size_t);
72
73	/**
74	* HMAC_SHA256_Final(digest, ctx):
75	* Output the HMAC-SHA256 of the data input to the context ${ctx} into the
76	* buffer ${digest}.
77	*/
78	void HMAC_SHA256_Final(uint8_t[32], HMAC_SHA256_CTX *);
79
80	/**
81	* HMAC_SHA256_Buf(K, Klen, in, len, digest):
82	* Compute the HMAC-SHA256 of ${len} bytes from ${in} using the key ${K} of
83	* length ${Klen}, and write the result to ${digest}.
84	*/
85	void HMAC_SHA256_Buf(const void , size_t, const void , size_t, uint8_t[32]);
86
87	/**
88	* PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen):
89	* Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and
90	* write the output to buf. The value dkLen must be at most 32 * (2^32 - 1).
91	*/
92	void PBKDF2_SHA256(const uint8_t , size_t, const uint8_t , size_t,
93	uint64_t, uint8_t *, size_t);
94
95	#endif /* !_SHA256_H_ */