54 static void SipHash_Rounds(SIPHASH_CTX *ctx, int rounds)  in SipHash_Rounds()  argument
57 		ctx->v[0] += ctx->v[1];  in SipHash_Rounds()
58 		ctx->v[2] += ctx->v[3];  in SipHash_Rounds()
59 		ctx->v[1] = rol64(ctx->v[1], 13);  in SipHash_Rounds()
60 		ctx->v[3] = rol64(ctx->v[3], 16);  in SipHash_Rounds()
62 		ctx->v[1] ^= ctx->v[0];  in SipHash_Rounds()
63 		ctx->v[3] ^= ctx->v[2];  in SipHash_Rounds()
64 		ctx->v[0] = rol64(ctx->v[0], 32);  in SipHash_Rounds()
66 		ctx->v[2] += ctx->v[1];  in SipHash_Rounds()
67 		ctx->v[0] += ctx->v[3];  in SipHash_Rounds()
68 		ctx->v[1] = rol64(ctx->v[1], 17);  in SipHash_Rounds()
69 		ctx->v[3] = rol64(ctx->v[3], 21);  in SipHash_Rounds()
71 		ctx->v[1] ^= ctx->v[2];  in SipHash_Rounds()
72 		ctx->v[3] ^= ctx->v[0];  in SipHash_Rounds()
73 		ctx->v[2] = rol64(ctx->v[2], 32);  in SipHash_Rounds()
77 static void SipHash_CRounds(SIPHASH_CTX *ctx, const void *ptr, int rounds)  in SipHash_CRounds()  argument
81 	ctx->v[3] ^= m;  in SipHash_CRounds()
82 	SipHash_Rounds(ctx, rounds);  in SipHash_CRounds()
83 	ctx->v[0] ^= m;  in SipHash_CRounds()
86 void SipHash_Init(SIPHASH_CTX *ctx, const SIPHASH_KEY *key)  in SipHash_Init()  argument
93 	ctx->v[0] = 0x736f6d6570736575ULL ^ k0;  in SipHash_Init()
94 	ctx->v[1] = 0x646f72616e646f6dULL ^ k1;  in SipHash_Init()
95 	ctx->v[2] = 0x6c7967656e657261ULL ^ k0;  in SipHash_Init()
96 	ctx->v[3] = 0x7465646279746573ULL ^ k1;  in SipHash_Init()
98 	memset(ctx->buf, 0, sizeof(ctx->buf));  in SipHash_Init()
99 	ctx->bytes = 0;  in SipHash_Init()
102 void SipHash_Update(SIPHASH_CTX *ctx, int rc, int rf,  in SipHash_Update()  argument
111 	used = ctx->bytes % sizeof(ctx->buf);  in SipHash_Update()
112 	ctx->bytes += len;  in SipHash_Update()
115 		left = sizeof(ctx->buf) - used;  in SipHash_Update()
118 			memcpy(&ctx->buf[used], ptr, left);  in SipHash_Update()
119 			SipHash_CRounds(ctx, ctx->buf, rc);  in SipHash_Update()
123 			memcpy(&ctx->buf[used], ptr, len);  in SipHash_Update()
128 	while (len >= sizeof(ctx->buf)) {  in SipHash_Update()
129 		SipHash_CRounds(ctx, ptr, rc);  in SipHash_Update()
130 		len -= sizeof(ctx->buf);  in SipHash_Update()
131 		ptr += sizeof(ctx->buf);  in SipHash_Update()
135 		memcpy(&ctx->buf[used], ptr, len);  in SipHash_Update()
138 void SipHash_Final(void *dst, SIPHASH_CTX *ctx, int rc, int rf)  in SipHash_Final()  argument
142 	r = SipHash_End(ctx, rc, rf);  in SipHash_Final()
147 u64 SipHash_End(SIPHASH_CTX *ctx, int rc, int rf)  in SipHash_End()  argument
152 	used = ctx->bytes % sizeof(ctx->buf);  in SipHash_End()
153 	left = sizeof(ctx->buf) - used;  in SipHash_End()
154 	memset(&ctx->buf[used], 0, left - 1);  in SipHash_End()
155 	ctx->buf[7] = ctx->bytes;  in SipHash_End()
157 	SipHash_CRounds(ctx, ctx->buf, rc);  in SipHash_End()
158 	ctx->v[2] ^= 0xff;  in SipHash_End()
159 	SipHash_Rounds(ctx, rf);  in SipHash_End()
161 	r = (ctx->v[0] ^ ctx->v[1]) ^ (ctx->v[2] ^ ctx->v[3]);  in SipHash_End()
162 	memset(ctx, 0, sizeof(*ctx));  in SipHash_End()
168 	SIPHASH_CTX ctx;  in SipHash()  local
170 	SipHash_Init(&ctx, key);  in SipHash()
171 	SipHash_Update(&ctx, rc, rf, src, len);  in SipHash()
172 	return SipHash_End(&ctx, rc, rf);  in SipHash()