18c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen/*- 28c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 483a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t * Copyright (c) 2008-2013, by Michael Tuexen. All rights reserved. 583a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t * Copyright (c) 2013, by Lally Singh. All rights reserved. 68c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 7ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * Redistribution and use in source and binary forms, with or without 88c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * modification, are permitted provided that the following conditions are met: 9ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * 10ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * a) Redistributions of source code must retain the above copyright notice, 118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * this list of conditions and the following disclaimer. 128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 13ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * b) Redistributions in binary form must reproduce the above copyright 14ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * notice, this list of conditions and the following disclaimer in 158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * the documentation and/or other materials provided with the distribution. 168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 17ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * c) Neither the name of Cisco Systems, Inc. nor the names of its 18ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * contributors may be used to endorse or promote products derived 198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * from this software without specific prior written permission. 208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * 21ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 25ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30ecc6b8c25a7e8d9d2b78889e88224354a1cc3160tuexen * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * THE POSSIBILITY OF SUCH DAMAGE. 328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen#include <netinet/sctp_sha1.h> 3583a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 3683a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#if defined(SCTP_USE_NSS_SHA1) 3783a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t/* A SHA-1 Digest is 160 bits, or 20 bytes */ 3883a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define SHA_DIGEST_LENGTH (20) 3983a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 4083a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tvoid 4183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_init(struct sctp_sha1_context *ctx) 4283a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t{ 4383a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t ctx->pk11_ctx = PK11_CreateDigestContext(SEC_OID_SHA1); 4483a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t PK11_DigestBegin(ctx->pk11_ctx); 4583a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t} 4683a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 4783a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tvoid 4883a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_update(struct sctp_sha1_context *ctx, const unsigned char *ptr, unsigned int siz) 4983a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t{ 5083a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t PK11_DigestOp(ctx->pk11_ctx, ptr, siz); 5183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t} 5283a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 5383a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tvoid 5483a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_final(unsigned char *digest, struct sctp_sha1_context *ctx) 5583a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t{ 5683a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t unsigned int output_len = 0; 5783a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 5883a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t PK11_DigestFinal(ctx->pk11_ctx, digest, &output_len, SHA_DIGEST_LENGTH); 5983a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t PK11_DestroyContext(ctx->pk11_ctx, PR_TRUE); 6083a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t} 6183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 6283a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#elif defined(SCTP_USE_OPENSSL_SHA1) 6383a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 6483a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tvoid 6583a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_init(struct sctp_sha1_context *ctx) 6683a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t{ 6783a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t SHA1_Init(&ctx->sha_ctx); 6883a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t} 6983a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 7083a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tvoid 7183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_update(struct sctp_sha1_context *ctx, const unsigned char *ptr, unsigned int siz) 7283a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t{ 7383a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t SHA1_Update(&ctx->sha_ctx, ptr, (unsigned long)siz); 7483a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t} 7583a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 7683a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tvoid 7783a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_final(unsigned char *digest, struct sctp_sha1_context *ctx) 7883a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t{ 7983a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t SHA1_Final(digest, &ctx->sha_ctx); 8083a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t} 8183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 8281616c6a3e184f46276632dd15aa489cd06d94dftuexen#else 8383a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 84a804fa53b20093a975fc501f62a08313110328cetuexen#include <string.h> 85928aba39566b26e350e558ad589cfdb3a5b5f314t#if defined(__Userspace_os_Windows) 86928aba39566b26e350e558ad589cfdb3a5b5f314t#include <winsock2.h> 87928aba39566b26e350e558ad589cfdb3a5b5f314t#elif !defined(__Windows__) 88928aba39566b26e350e558ad589cfdb3a5b5f314t#include <arpa/inet.h> 89928aba39566b26e350e558ad589cfdb3a5b5f314t#endif 9083a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 9183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define F1(B,C,D) (((B & C) | ((~B) & D))) /* 0 <= t <= 19 */ 9283a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define F2(B,C,D) (B ^ C ^ D) /* 20 <= t <= 39 */ 9383a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define F3(B,C,D) ((B & C) | (B & D) | (C & D)) /* 40 <= t <= 59 */ 9483a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define F4(B,C,D) (B ^ C ^ D) /* 600 <= t <= 79 */ 9583a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 9683a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t/* circular shift */ 9783a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define CSHIFT(A,B) ((B << A) | (B >> (32-A))) 9883a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 9983a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define K1 0x5a827999 /* 0 <= t <= 19 */ 10083a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define K2 0x6ed9eba1 /* 20 <= t <= 39 */ 10183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define K3 0x8f1bbcdc /* 40 <= t <= 59 */ 10283a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define K4 0xca62c1d6 /* 60 <= t <= 79 */ 10383a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 10483a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define H0INIT 0x67452301 10583a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define H1INIT 0xefcdab89 10683a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define H2INIT 0x98badcfe 10783a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define H3INIT 0x10325476 10883a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#define H4INIT 0xc3d2e1f0 10983a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 1108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenvoid 11183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_init(struct sctp_sha1_context *ctx) 1128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 1138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Init the SHA-1 context structure */ 1148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->A = 0; 1158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->B = 0; 1168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->C = 0; 1178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->D = 0; 1188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->E = 0; 1198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H0 = H0INIT; 1208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H1 = H1INIT; 1218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H2 = H2INIT; 1228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H3 = H3INIT; 1238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H4 = H4INIT; 1248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->TEMP = 0; 1258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen memset(ctx->words, 0, sizeof(ctx->words)); 1268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->how_many_in_block = 0; 1278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->running_total = 0; 1288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 1298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenstatic void 13183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_process_a_block(struct sctp_sha1_context *ctx, unsigned int *block) 1328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 1338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int i; 1348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* init the W0-W15 to the block of words being hashed. */ 1368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* step a) */ 1378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen for (i = 0; i < 16; i++) { 1388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->words[i] = ntohl(block[i]); 1398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* now init the rest based on the SHA-1 formula, step b) */ 1418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen for (i = 16; i < 80; i++) { 1428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->words[i] = CSHIFT(1, ((ctx->words[(i - 3)]) ^ 1438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->words[(i - 8)]) ^ 1448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->words[(i - 14)]) ^ 1458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->words[(i - 16)]))); 1468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* step c) */ 1488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->A = ctx->H0; 1498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->B = ctx->H1; 1508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->C = ctx->H2; 1518c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->D = ctx->H3; 1528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->E = ctx->H4; 1538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1548c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* step d) */ 1558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen for (i = 0; i < 80; i++) { 1568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (i < 20) { 1578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->TEMP = ((CSHIFT(5, ctx->A)) + 1588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (F1(ctx->B, ctx->C, ctx->D)) + 1598c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->E) + 1608c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->words[i] + 1618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen K1); 1628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (i < 40) { 1638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->TEMP = ((CSHIFT(5, ctx->A)) + 1648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (F2(ctx->B, ctx->C, ctx->D)) + 1658c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->E) + 1668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->words[i]) + 1678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen K2); 1688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (i < 60) { 1698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->TEMP = ((CSHIFT(5, ctx->A)) + 1708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (F3(ctx->B, ctx->C, ctx->D)) + 1718c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->E) + 1728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->words[i]) + 1738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen K3); 1748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 1758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->TEMP = ((CSHIFT(5, ctx->A)) + 1768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (F4(ctx->B, ctx->C, ctx->D)) + 1778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->E) + 1788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (ctx->words[i]) + 1798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen K4); 1808c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->E = ctx->D; 1828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->D = ctx->C; 1838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->C = CSHIFT(30, ctx->B); 1848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->B = ctx->A; 1858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->A = ctx->TEMP; 1868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 1878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* step e) */ 1888c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H0 = (ctx->H0) + (ctx->A); 1898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H1 = (ctx->H1) + (ctx->B); 1908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H2 = (ctx->H2) + (ctx->C); 1918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H3 = (ctx->H3) + (ctx->D); 1928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->H4 = (ctx->H4) + (ctx->E); 1938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 1948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 1958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenvoid 19683a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_update(struct sctp_sha1_context *ctx, const unsigned char *ptr, unsigned int siz) 1978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 19883a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t unsigned int number_left, left_to_fill; 1998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 2008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen number_left = siz; 2018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen while (number_left > 0) { 2028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen left_to_fill = sizeof(ctx->sha_block) - ctx->how_many_in_block; 2038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (left_to_fill > number_left) { 2048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* can only partially fill up this one */ 2058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen memcpy(&ctx->sha_block[ctx->how_many_in_block], 2068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ptr, number_left); 2078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->how_many_in_block += number_left; 2088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->running_total += number_left; 2098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen break; 2108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 2118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* block is now full, process it */ 2128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen memcpy(&ctx->sha_block[ctx->how_many_in_block], 2138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ptr, left_to_fill); 21483a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t sctp_sha1_process_a_block(ctx, 2158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (unsigned int *)ctx->sha_block); 2168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen number_left -= left_to_fill; 2178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->running_total += left_to_fill; 2188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->how_many_in_block = 0; 2198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ptr = (const unsigned char *)(ptr + left_to_fill); 2208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 2238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 2248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexenvoid 22583a86bbf399ce2b9b51cdf1c0c679944bbcee0a9tsctp_sha1_final(unsigned char *digest, struct sctp_sha1_context *ctx) 2268c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen{ 2278c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 2288c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * if any left in block fill with padding and process. Then transfer 2298c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * the digest to the pointer. At the last block some special rules 2308c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * need to apply. We must add a 1 bit following the message, then we 2318c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * pad with 0's. The total size is encoded as a 64 bit number at the 2328c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * end. Now if the last buffer has more than 55 octets in it we 2338c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * cannot fit the 64 bit number + 10000000 pad on the end and must 2348c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * add the 10000000 pad, pad the rest of the message with 0's and 2358c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * then create an all 0 message with just the 64 bit size at the end 2368c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * and run this block through by itself. Also the 64 bit int must 2378c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * be in network byte order. 2388c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 2398c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen int left_to_fill; 2408c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen unsigned int i, *ptr; 2418c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 2428c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (ctx->how_many_in_block > 55) { 2438c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 2448c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * special case, we need to process two blocks here. One for 2458c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * the current stuff plus possibly the pad. The other for 2468c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * the size. 2478c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 2488c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen left_to_fill = sizeof(ctx->sha_block) - ctx->how_many_in_block; 2498c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen if (left_to_fill == 0) { 2508c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* Should not really happen but I am paranoid */ 25183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t sctp_sha1_process_a_block(ctx, 2528c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (unsigned int *)ctx->sha_block); 2538c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* init last block, a bit different than the rest */ 254f10a07777f745f47ace3cf4dfaf7f1d94093c8f2t ctx->sha_block[0] = '\x80'; 2558c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen for (i = 1; i < sizeof(ctx->sha_block); i++) { 2568c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->sha_block[i] = 0x0; 2578c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2588c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else if (left_to_fill == 1) { 259f10a07777f745f47ace3cf4dfaf7f1d94093c8f2t ctx->sha_block[ctx->how_many_in_block] = '\x80'; 26083a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t sctp_sha1_process_a_block(ctx, 2618c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (unsigned int *)ctx->sha_block); 2628c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* init last block */ 2638c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen memset(ctx->sha_block, 0, sizeof(ctx->sha_block)); 2648c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 265f10a07777f745f47ace3cf4dfaf7f1d94093c8f2t ctx->sha_block[ctx->how_many_in_block] = '\x80'; 2668c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen for (i = (ctx->how_many_in_block + 1); 2678c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen i < sizeof(ctx->sha_block); 2688c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen i++) { 2698c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->sha_block[i] = 0x0; 2708c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 27183a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t sctp_sha1_process_a_block(ctx, 2728c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen (unsigned int *)ctx->sha_block); 2738c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* init last block */ 2748c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen memset(ctx->sha_block, 0, sizeof(ctx->sha_block)); 2758c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2768c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* This is in bits so multiply by 8 */ 2778c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->running_total *= 8; 2788c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ptr = (unsigned int *)&ctx->sha_block[60]; 2798c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen *ptr = htonl(ctx->running_total); 28083a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t sctp_sha1_process_a_block(ctx, (unsigned int *)ctx->sha_block); 2818c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } else { 2828c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* 2838c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * easy case, we just pad this message to size - end with 0 2848c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * add the magic 0x80 to the next word and then put the 2858c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * network byte order size in the last spot and process the 2868c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen * block. 2878c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen */ 288f10a07777f745f47ace3cf4dfaf7f1d94093c8f2t ctx->sha_block[ctx->how_many_in_block] = '\x80'; 2898c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen for (i = (ctx->how_many_in_block + 1); 2908c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen i < sizeof(ctx->sha_block); 2918c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen i++) { 2928c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->sha_block[i] = 0x0; 2938c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 2948c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* get last int spot */ 2958c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ctx->running_total *= 8; 2968c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen ptr = (unsigned int *)&ctx->sha_block[60]; 2978c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen *ptr = htonl(ctx->running_total); 29883a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t sctp_sha1_process_a_block(ctx, (unsigned int *)ctx->sha_block); 2998c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen } 3008c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen /* transfer the digest back to the user */ 3018c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[3] = (ctx->H0 & 0xff); 3028c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[2] = ((ctx->H0 >> 8) & 0xff); 3038c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[1] = ((ctx->H0 >> 16) & 0xff); 3048c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[0] = ((ctx->H0 >> 24) & 0xff); 3058c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 3068c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[7] = (ctx->H1 & 0xff); 3078c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[6] = ((ctx->H1 >> 8) & 0xff); 3088c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[5] = ((ctx->H1 >> 16) & 0xff); 3098c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[4] = ((ctx->H1 >> 24) & 0xff); 3108c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 3118c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[11] = (ctx->H2 & 0xff); 3128c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[10] = ((ctx->H2 >> 8) & 0xff); 3138c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[9] = ((ctx->H2 >> 16) & 0xff); 3148c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[8] = ((ctx->H2 >> 24) & 0xff); 3158c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 3168c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[15] = (ctx->H3 & 0xff); 3178c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[14] = ((ctx->H3 >> 8) & 0xff); 3188c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[13] = ((ctx->H3 >> 16) & 0xff); 3198c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[12] = ((ctx->H3 >> 24) & 0xff); 3208c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen 3218c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[19] = (ctx->H4 & 0xff); 3228c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[18] = ((ctx->H4 >> 8) & 0xff); 3238c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[17] = ((ctx->H4 >> 16) & 0xff); 3248c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen digest[16] = ((ctx->H4 >> 24) & 0xff); 3258c8a4cae58a2deed148551d56cb1ab315a55dbbdtuexen} 32683a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t 32783a86bbf399ce2b9b51cdf1c0c679944bbcee0a9t#endif 328