1 // SPDX-License-Identifier: GPL-2.0
12  * Copyright (c) Andrew Tridgell 1997-1998.
32 	x &= 0xFFFFFFFF;  in lshift()
33 	return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s));  in lshift()
51 #define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s))  argument
52 #define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (u32)0x5A827999,s))  argument
53 #define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (u32)0x6ED9EBA1,s))  argument
57 	u32 a, b, c, d;  in md4_transform()  local
59 	a = hash[0];  in md4_transform()
62 	d = hash[3];  in md4_transform()
64 	ROUND1(a, b, c, d, in[0], 3);  in md4_transform()
65 	ROUND1(d, a, b, c, in[1], 7);  in md4_transform()
66 	ROUND1(c, d, a, b, in[2], 11);  in md4_transform()
67 	ROUND1(b, c, d, a, in[3], 19);  in md4_transform()
68 	ROUND1(a, b, c, d, in[4], 3);  in md4_transform()
69 	ROUND1(d, a, b, c, in[5], 7);  in md4_transform()
70 	ROUND1(c, d, a, b, in[6], 11);  in md4_transform()
71 	ROUND1(b, c, d, a, in[7], 19);  in md4_transform()
72 	ROUND1(a, b, c, d, in[8], 3);  in md4_transform()
73 	ROUND1(d, a, b, c, in[9], 7);  in md4_transform()
74 	ROUND1(c, d, a, b, in[10], 11);  in md4_transform()
75 	ROUND1(b, c, d, a, in[11], 19);  in md4_transform()
76 	ROUND1(a, b, c, d, in[12], 3);  in md4_transform()
77 	ROUND1(d, a, b, c, in[13], 7);  in md4_transform()
78 	ROUND1(c, d, a, b, in[14], 11);  in md4_transform()
79 	ROUND1(b, c, d, a, in[15], 19);  in md4_transform()
81 	ROUND2(a, b, c, d, in[0], 3);  in md4_transform()
82 	ROUND2(d, a, b, c, in[4], 5);  in md4_transform()
83 	ROUND2(c, d, a, b, in[8], 9);  in md4_transform()
84 	ROUND2(b, c, d, a, in[12], 13);  in md4_transform()
85 	ROUND2(a, b, c, d, in[1], 3);  in md4_transform()
86 	ROUND2(d, a, b, c, in[5], 5);  in md4_transform()
87 	ROUND2(c, d, a, b, in[9], 9);  in md4_transform()
88 	ROUND2(b, c, d, a, in[13], 13);  in md4_transform()
89 	ROUND2(a, b, c, d, in[2], 3);  in md4_transform()
90 	ROUND2(d, a, b, c, in[6], 5);  in md4_transform()
91 	ROUND2(c, d, a, b, in[10], 9);  in md4_transform()
92 	ROUND2(b, c, d, a, in[14], 13);  in md4_transform()
93 	ROUND2(a, b, c, d, in[3], 3);  in md4_transform()
94 	ROUND2(d, a, b, c, in[7], 5);  in md4_transform()
95 	ROUND2(c, d, a, b, in[11], 9);  in md4_transform()
96 	ROUND2(b, c, d, a, in[15], 13);  in md4_transform()
98 	ROUND3(a, b, c, d, in[0], 3);  in md4_transform()
99 	ROUND3(d, a, b, c, in[8], 9);  in md4_transform()
100 	ROUND3(c, d, a, b, in[4], 11);  in md4_transform()
101 	ROUND3(b, c, d, a, in[12], 15);  in md4_transform()
102 	ROUND3(a, b, c, d, in[2], 3);  in md4_transform()
103 	ROUND3(d, a, b, c, in[10], 9);  in md4_transform()
104 	ROUND3(c, d, a, b, in[6], 11);  in md4_transform()
105 	ROUND3(b, c, d, a, in[14], 15);  in md4_transform()
106 	ROUND3(a, b, c, d, in[1], 3);  in md4_transform()
107 	ROUND3(d, a, b, c, in[9], 9);  in md4_transform()
108 	ROUND3(c, d, a, b, in[5], 11);  in md4_transform()
109 	ROUND3(b, c, d, a, in[13], 15);  in md4_transform()
110 	ROUND3(a, b, c, d, in[3], 3);  in md4_transform()
111 	ROUND3(d, a, b, c, in[11], 9);  in md4_transform()
112 	ROUND3(c, d, a, b, in[7], 11);  in md4_transform()
113 	ROUND3(b, c, d, a, in[15], 15);  in md4_transform()
115 	hash[0] += a;  in md4_transform()
118 	hash[3] += d;  in md4_transform()
123 	le32_to_cpu_array(ctx->block, ARRAY_SIZE(ctx->block));  in md4_transform_helper()
124 	md4_transform(ctx->hash, ctx->block);  in md4_transform_helper()
129 	memset(mctx, 0, sizeof(struct md4_ctx));  in cifs_md4_init()
130 	mctx->hash[0] = 0x67452301;  in cifs_md4_init()
131 	mctx->hash[1] = 0xefcdab89;  in cifs_md4_init()
132 	mctx->hash[2] = 0x98badcfe;  in cifs_md4_init()
133 	mctx->hash[3] = 0x10325476;  in cifs_md4_init()
134 	mctx->byte_count = 0;  in cifs_md4_init()
136 	return 0;  in cifs_md4_init()
142 	const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);  in cifs_md4_update()
144 	mctx->byte_count += len;  in cifs_md4_update()
147 		memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),  in cifs_md4_update()
149 		return 0;  in cifs_md4_update()
152 	memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),  in cifs_md4_update()
157 	len -= avail;  in cifs_md4_update()
159 	while (len >= sizeof(mctx->block)) {  in cifs_md4_update()
160 		memcpy(mctx->block, data, sizeof(mctx->block));  in cifs_md4_update()
162 		data += sizeof(mctx->block);  in cifs_md4_update()
163 		len -= sizeof(mctx->block);  in cifs_md4_update()
166 	memcpy(mctx->block, data, len);  in cifs_md4_update()
168 	return 0;  in cifs_md4_update()
174 	const unsigned int offset = mctx->byte_count & 0x3f;  in cifs_md4_final()
175 	char *p = (char *)mctx->block + offset;  in cifs_md4_final()
176 	int padding = 56 - (offset + 1);  in cifs_md4_final()
178 	*p++ = 0x80;  in cifs_md4_final()
179 	if (padding < 0) {  in cifs_md4_final()
180 		memset(p, 0x00, padding + sizeof(u64));  in cifs_md4_final()
182 		p = (char *)mctx->block;  in cifs_md4_final()
186 	memset(p, 0, padding);  in cifs_md4_final()
187 	mctx->block[14] = mctx->byte_count << 3;  in cifs_md4_final()
188 	mctx->block[15] = mctx->byte_count >> 29;  in cifs_md4_final()
189 	le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -  in cifs_md4_final()
191 	md4_transform(mctx->hash, mctx->block);  in cifs_md4_final()
192 	cpu_to_le32_array(mctx->hash, ARRAY_SIZE(mctx->hash));  in cifs_md4_final()
193 	memcpy(out, mctx->hash, sizeof(mctx->hash));  in cifs_md4_final()
194 	memset(mctx, 0, sizeof(*mctx));  in cifs_md4_final()
196 	return 0;  in cifs_md4_final()