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#ifndef CRYPTO_H_DEFINED
#define CRYPTO_H_DEFINED
#define DIGEST_SHA1 0
#define PRNG_SOBER 0
enum {
CRYPT_OK=0, /* Result OK */
CRYPT_ERROR, /* Generic Error */
CRYPT_NOP, /* Not a failure but no operation was performed */
CRYPT_INVALID_KEYSIZE, /* Invalid key size given */
CRYPT_INVALID_ROUNDS, /* Invalid number of rounds */
CRYPT_FAIL_TESTVECTOR, /* Algorithm failed test vectors */
CRYPT_BUFFER_OVERFLOW, /* Not enough space for output */
CRYPT_INVALID_PACKET, /* Invalid input packet given */
CRYPT_INVALID_PRNGSIZE, /* Invalid number of bits for a PRNG */
CRYPT_ERROR_READPRNG, /* Could not read enough from PRNG */
CRYPT_INVALID_CIPHER, /* Invalid cipher specified */
CRYPT_INVALID_HASH, /* Invalid hash specified */
CRYPT_INVALID_PRNG, /* Invalid PRNG specified */
CRYPT_MEM, /* Out of memory */
CRYPT_PK_TYPE_MISMATCH, /* Not equivalent types of PK keys */
CRYPT_PK_NOT_PRIVATE, /* Requires a private PK key */
CRYPT_INVALID_ARG, /* Generic invalid argument */
CRYPT_FILE_NOTFOUND, /* File Not Found */
CRYPT_PK_INVALID_TYPE, /* Invalid type of PK key */
CRYPT_PK_INVALID_SYSTEM,/* Invalid PK system specified */
CRYPT_PK_DUP, /* Duplicate key already in key ring */
CRYPT_PK_NOT_FOUND, /* Key not found in keyring */
CRYPT_PK_INVALID_SIZE, /* Invalid size input for PK parameters */
CRYPT_INVALID_PRIME_SIZE/* Invalid size of prime requested */
};
struct sha1_state {
unsigned long long length;
unsigned long state[5], curlen;
unsigned char buf[64];
};
typedef union Hash_state {
struct sha1_state sha1;
} hash_state;
struct _hash_descriptor {
char *name;
unsigned char ID;
unsigned long hashsize; /* digest output size in bytes */
unsigned long blocksize; /* the block size the hash uses */
unsigned char DER[64]; /* DER encoded identifier */
unsigned long DERlen; /* length of DER encoding */
void (*init)(hash_state *);
int (*process)(hash_state *, const unsigned char *, unsigned long);
int (*done)(hash_state *, unsigned char *);
int (*test)(void);
};
extern const struct _hash_descriptor *hash_descriptor[];
void sha1_init(hash_state * md);
int sha1_process(hash_state * md, const unsigned char *buf, unsigned long len);
int sha1_done(hash_state * md, unsigned char *hash);
int sha1_test(void);
int hash_memory(int hash, const unsigned char *data, unsigned long len, unsigned char *dst, unsigned long *outlen);
#define MAXBLOCKSIZE 128
typedef struct Hmac_state {
hash_state md;
int hash;
hash_state hashstate;
unsigned char key[MAXBLOCKSIZE];
} hmac_state;
int hmac_init(hmac_state *hmac, int hash, const unsigned char *key, unsigned long keylen);
int hmac_process(hmac_state *hmac, const unsigned char *buf, unsigned long len);
int hmac_done(hmac_state *hmac, unsigned char *hashOut, unsigned long *outlen);
int hmac_test(void);
int hmac_memory(int hash, const unsigned char *key, unsigned long keylen,
const unsigned char *data, unsigned long len,
unsigned char *dst, unsigned long *dstlen);
struct sober128_prng {
unsigned long R[17], /* Working storage for the shift register */
initR[17], /* saved register contents */
konst, /* key dependent constant */
sbuf; /* partial word encryption buffer */
int nbuf, /* number of part-word stream bits buffered */
flag, /* first add_entropy call or not? */
set; /* did we call add_entropy to set key? */
};
typedef union Prng_state {
struct sober128_prng sober128;
} prng_state;
struct _prng_descriptor {
char *name;
int export_size; /* size in bytes of exported state */
int (*start)(prng_state *);
int (*add_entropy)(const unsigned char *, unsigned long, prng_state *);
int (*ready)(prng_state *);
unsigned long (*read)(unsigned char *, unsigned long, prng_state *);
};
extern const struct _prng_descriptor *prng_descriptor[];
int sober128_start(prng_state *prng);
int sober128_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng);
int sober128_ready(prng_state *prng);
unsigned long sober128_read(unsigned char *buf, unsigned long len, prng_state *prng);
int sober128_done(prng_state *prng);
int sober128_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
int sober128_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
int sober128_test(void);
unsigned long rng_get_bytes(unsigned char *buf,
unsigned long len,
void (*callback)(void));
int rng_make_prng(int bits, int wprng, prng_state *prng, void (*callback)(void));
#endif /* CRYPTO_H_DEFINED */

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