142 static void sha_reset(struct sha_t *sha)  in sha_reset()  argument
146 	sha->mindex = 0;  in sha_reset()
147 	sha->mcomputed = false;  in sha_reset()
148 	sha->mcorrupted = false;  in sha_reset()
149 	for (i = 0; i < sizeof(sha->mlength); i++)  in sha_reset()
150 		sha->mlength[i] = 0;  in sha_reset()
152 	sha1_init(sha->mdigest);  in sha_reset()
155 static void sha_processblock(struct sha_t *sha)  in sha_processblock()  argument
159 	sha1_transform(sha->mdigest, sha->mblock, array);  in sha_processblock()
160 	sha->mindex = 0;  in sha_processblock()
163 static void sha_padmessage(struct sha_t *sha)  in sha_padmessage()  argument
171 	if (sha->mindex > 55) {  in sha_padmessage()
172 		sha->mblock[sha->mindex++] = 0x80;  in sha_padmessage()
173 		while (sha->mindex < 64)  in sha_padmessage()
174 			sha->mblock[sha->mindex++] = 0;  in sha_padmessage()
176 		sha_processblock(sha);  in sha_padmessage()
177 		while (sha->mindex < 56)  in sha_padmessage()
178 			sha->mblock[sha->mindex++] = 0;  in sha_padmessage()
180 		sha->mblock[sha->mindex++] = 0x80;  in sha_padmessage()
181 		while (sha->mindex < 56)  in sha_padmessage()
182 			sha->mblock[sha->mindex++] = 0;  in sha_padmessage()
186 	sha->mblock[56] = sha->mlength[7];  in sha_padmessage()
187 	sha->mblock[57] = sha->mlength[6];  in sha_padmessage()
188 	sha->mblock[58] = sha->mlength[5];  in sha_padmessage()
189 	sha->mblock[59] = sha->mlength[4];  in sha_padmessage()
190 	sha->mblock[60] = sha->mlength[3];  in sha_padmessage()
191 	sha->mblock[61] = sha->mlength[2];  in sha_padmessage()
192 	sha->mblock[62] = sha->mlength[1];  in sha_padmessage()
193 	sha->mblock[63] = sha->mlength[0];  in sha_padmessage()
195 	sha_processblock(sha);  in sha_padmessage()
198 static int sha_result(struct sha_t *sha)  in sha_result()  argument
200 	if (sha->mcorrupted)  in sha_result()
203 	if (sha->mcomputed == 0) {  in sha_result()
204 		sha_padmessage(sha);  in sha_result()
205 		sha->mcomputed = true;  in sha_result()
210 static void sha_input(struct sha_t *sha, const u8 *data, u32 size)  in sha_input()  argument
219 	if (sha->mcomputed || sha->mcorrupted) {  in sha_input()
220 		sha->mcorrupted = true;  in sha_input()
223 	while (size-- && !sha->mcorrupted) {  in sha_input()
224 		sha->mblock[sha->mindex++] = *data;  in sha_input()
228 			for (j = 0; j < sizeof(sha->mlength); j++) {  in sha_input()
229 				sha->mlength[j]++;  in sha_input()
230 				if (sha->mlength[j] != 0) {  in sha_input()
235 			sha->mcorrupted = (sha->mcorrupted  ||  in sha_input()
239 		if (sha->mindex == 64)  in sha_input()
240 			sha_processblock(sha);  in sha_input()
248 	struct sha_t sha;  in hdcp_verify_ksv()  local
253 	sha_reset(&sha);  in hdcp_verify_ksv()
254 	sha_input(&sha, data, size - SHAMAX);  in hdcp_verify_ksv()
255 	if (sha_result(&sha) == false)  in hdcp_verify_ksv()
259 		if (data[size - SHAMAX + i] != (u8)(sha.mdigest[i / 4]  in hdcp_verify_ksv()