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ripemd160.h (4210B)

      1 
      2 #ifndef CCAN_CRYPTO_RIPEMD160_H
      3 #define CCAN_CRYPTO_RIPEMD160_H
      4 /* BSD-MIT - see LICENSE file for details */
      5 #include <stdint.h>
      6 #include <stdlib.h>
      7 
      8 /* Uncomment this to use openssl's RIPEMD160 routines (and link with -lcrypto) */
      9 /*#define CCAN_CRYPTO_RIPEMD160_USE_OPENSSL 1*/
     10 
     11 #ifdef CCAN_CRYPTO_RIPEMD160_USE_OPENSSL
     12 #include <openssl/ripemd.h>
     13 #endif
     14 
     15 /**
     16  * struct ripemd160 - structure representing a completed RIPEMD160.
     17  * @u.u8: an unsigned char array.
     18  * @u.u32: a 32-bit integer array.
     19  *
     20  * Other fields may be added to the union in future.
     21  */
     22 struct ripemd160 {
     23 	union {
     24 		/* Array of chars */
     25 		unsigned char u8[20];
     26 		/* Array of uint32_t */
     27 		uint32_t u32[5];
     28 	} u;
     29 };
     30 
     31 /**
     32  * ripemd160 - return ripemd160 of an object.
     33  * @ripemd160: the ripemd160 to fill in
     34  * @p: pointer to memory,
     35  * @size: the number of bytes pointed to by @p
     36  *
     37  * The bytes pointed to by @p is RIPEMD160 hashed into @ripemd160.  This is
     38  * equivalent to ripemd160_init(), ripemd160_update() then ripemd160_done().
     39  */
     40 void ripemd160(struct ripemd160 *ripemd, const void *p, size_t size);
     41 
     42 /**
     43  * struct ripemd160_ctx - structure to store running context for ripemd160
     44  */
     45 struct ripemd160_ctx {
     46 #ifdef CCAN_CRYPTO_RIPEMD160_USE_OPENSSL
     47 	RIPEMD160_CTX c;
     48 #else
     49 	uint32_t s[5];
     50 	uint64_t bytes;
     51 	union {
     52 		uint32_t u32[16];
     53 		unsigned char u8[64];
     54 	} buf;
     55 #endif
     56 };
     57 
     58 /**
     59  * ripemd160_init - initialize an RIPEMD160 context.
     60  * @ctx: the ripemd160_ctx to initialize
     61  *
     62  * This must be called before ripemd160_update or ripemd160_done, or
     63  * alternately you can assign RIPEMD160_INIT.
     64  *
     65  * If it was already initialized, this forgets anything which was
     66  * hashed before.
     67  *
     68  * Example:
     69  * static void hash_all(const char **arr, struct ripemd160 *hash)
     70  * {
     71  *	size_t i;
     72  *	struct ripemd160_ctx ctx;
     73  *
     74  *	ripemd160_init(&ctx);
     75  *	for (i = 0; arr[i]; i++)
     76  *		ripemd160_update(&ctx, arr[i], strlen(arr[i]));
     77  *	ripemd160_done(&ctx, hash);
     78  * }
     79  */
     80 void ripemd160_init(struct ripemd160_ctx *ctx);
     81 
     82 /**
     83  * RIPEMD160_INIT - initializer for an RIPEMD160 context.
     84  *
     85  * This can be used to staticly initialize an RIPEMD160 context (instead
     86  * of ripemd160_init()).
     87  *
     88  * Example:
     89  * static void hash_all(const char **arr, struct ripemd160 *hash)
     90  * {
     91  *	size_t i;
     92  *	struct ripemd160_ctx ctx = RIPEMD160_INIT;
     93  *
     94  *	for (i = 0; arr[i]; i++)
     95  *		ripemd160_update(&ctx, arr[i], strlen(arr[i]));
     96  *	ripemd160_done(&ctx, hash);
     97  * }
     98  */
     99 #ifdef CCAN_CRYPTO_RIPEMD160_USE_OPENSSL
    100 #define RIPEMD160_INIT							\
    101 	{ { 0x67452301ul, 0xEFCDAB89ul, 0x98BADCFEul, 0x10325476ul,	\
    102 	    0xC3D2E1F0ul,						\
    103 	    0x0, 0x0,							\
    104 	    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },		\
    105 	    0 } }
    106 #else
    107 #define RIPEMD160_INIT							\
    108 	{ { 0x67452301ul, 0xEFCDAB89ul, 0x98BADCFEul, 0x10325476ul,	\
    109 	    0xC3D2E1F0ul }, 0, {{ 0 }} }
    110 #endif
    111 
    112 /**
    113  * ripemd160_update - include some memory in the hash.
    114  * @ctx: the ripemd160_ctx to use
    115  * @p: pointer to memory,
    116  * @size: the number of bytes pointed to by @p
    117  *
    118  * You can call this multiple times to hash more data, before calling
    119  * ripemd160_done().
    120  */
    121 void ripemd160_update(struct ripemd160_ctx *ctx, const void *p, size_t size);
    122 
    123 /**
    124  * ripemd160_done - finish RIPEMD160 and return the hash
    125  * @ctx: the ripemd160_ctx to complete
    126  * @res: the hash to return.
    127  *
    128  * Note that @ctx is *destroyed* by this, and must be reinitialized.
    129  * To avoid that, pass a copy instead.
    130  */
    131 void ripemd160_done(struct ripemd160_ctx *ripemd160, struct ripemd160 *res);
    132 
    133 /* Add various types to an RIPEMD160 hash */
    134 void ripemd160_u8(struct ripemd160_ctx *ctx, uint8_t v);
    135 void ripemd160_u16(struct ripemd160_ctx *ctx, uint16_t v);
    136 void ripemd160_u32(struct ripemd160_ctx *ctx, uint32_t v);
    137 void ripemd160_u64(struct ripemd160_ctx *ctx, uint64_t v);
    138 
    139 /* Add as little-endian */
    140 void ripemd160_le16(struct ripemd160_ctx *ctx, uint16_t v);
    141 void ripemd160_le32(struct ripemd160_ctx *ctx, uint32_t v);
    142 void ripemd160_le64(struct ripemd160_ctx *ctx, uint64_t v);
    143 
    144 /* Add as big-endian */
    145 void ripemd160_be16(struct ripemd160_ctx *ctx, uint16_t v);
    146 void ripemd160_be32(struct ripemd160_ctx *ctx, uint32_t v);
    147 void ripemd160_be64(struct ripemd160_ctx *ctx, uint64_t v);
    148 #endif /* CCAN_CRYPTO_RIPEMD160_H */