diff options
Diffstat (limited to 'netwerk/sctp/src/netinet/sctp_sha1.c')
| -rwxr-xr-x | netwerk/sctp/src/netinet/sctp_sha1.c | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/netwerk/sctp/src/netinet/sctp_sha1.c b/netwerk/sctp/src/netinet/sctp_sha1.c new file mode 100755 index 000000000..c86517f91 --- /dev/null +++ b/netwerk/sctp/src/netinet/sctp_sha1.c @@ -0,0 +1,327 @@ +/*- + * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. + * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. + * Copyright (c) 2008-2013, by Michael Tuexen. All rights reserved. + * Copyright (c) 2013, by Lally Singh. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * a) Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * b) Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the distribution. + * + * c) Neither the name of Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <netinet/sctp_sha1.h> + +#if defined(SCTP_USE_NSS_SHA1) +/* A SHA-1 Digest is 160 bits, or 20 bytes */ +#define SHA_DIGEST_LENGTH (20) + +void +sctp_sha1_init(struct sctp_sha1_context *ctx) +{ + ctx->pk11_ctx = PK11_CreateDigestContext(SEC_OID_SHA1); + PK11_DigestBegin(ctx->pk11_ctx); +} + +void +sctp_sha1_update(struct sctp_sha1_context *ctx, const unsigned char *ptr, unsigned int siz) +{ + PK11_DigestOp(ctx->pk11_ctx, ptr, siz); +} + +void +sctp_sha1_final(unsigned char *digest, struct sctp_sha1_context *ctx) +{ + unsigned int output_len = 0; + + PK11_DigestFinal(ctx->pk11_ctx, digest, &output_len, SHA_DIGEST_LENGTH); + PK11_DestroyContext(ctx->pk11_ctx, PR_TRUE); +} + +#elif defined(SCTP_USE_OPENSSL_SHA1) + +void +sctp_sha1_init(struct sctp_sha1_context *ctx) +{ + SHA1_Init(&ctx->sha_ctx); +} + +void +sctp_sha1_update(struct sctp_sha1_context *ctx, const unsigned char *ptr, unsigned int siz) +{ + SHA1_Update(&ctx->sha_ctx, ptr, (unsigned long)siz); +} + +void +sctp_sha1_final(unsigned char *digest, struct sctp_sha1_context *ctx) +{ + SHA1_Final(digest, &ctx->sha_ctx); +} + +#else + +#include <string.h> +#if defined(__Userspace_os_Windows) +#include <winsock2.h> +#elif !defined(__Windows__) +#include <arpa/inet.h> +#endif + +#define F1(B,C,D) (((B & C) | ((~B) & D))) /* 0 <= t <= 19 */ +#define F2(B,C,D) (B ^ C ^ D) /* 20 <= t <= 39 */ +#define F3(B,C,D) ((B & C) | (B & D) | (C & D)) /* 40 <= t <= 59 */ +#define F4(B,C,D) (B ^ C ^ D) /* 600 <= t <= 79 */ + +/* circular shift */ +#define CSHIFT(A,B) ((B << A) | (B >> (32-A))) + +#define K1 0x5a827999 /* 0 <= t <= 19 */ +#define K2 0x6ed9eba1 /* 20 <= t <= 39 */ +#define K3 0x8f1bbcdc /* 40 <= t <= 59 */ +#define K4 0xca62c1d6 /* 60 <= t <= 79 */ + +#define H0INIT 0x67452301 +#define H1INIT 0xefcdab89 +#define H2INIT 0x98badcfe +#define H3INIT 0x10325476 +#define H4INIT 0xc3d2e1f0 + +void +sctp_sha1_init(struct sctp_sha1_context *ctx) +{ + /* Init the SHA-1 context structure */ + ctx->A = 0; + ctx->B = 0; + ctx->C = 0; + ctx->D = 0; + ctx->E = 0; + ctx->H0 = H0INIT; + ctx->H1 = H1INIT; + ctx->H2 = H2INIT; + ctx->H3 = H3INIT; + ctx->H4 = H4INIT; + ctx->TEMP = 0; + memset(ctx->words, 0, sizeof(ctx->words)); + ctx->how_many_in_block = 0; + ctx->running_total = 0; +} + +static void +sctp_sha1_process_a_block(struct sctp_sha1_context *ctx, unsigned int *block) +{ + int i; + + /* init the W0-W15 to the block of words being hashed. */ + /* step a) */ + for (i = 0; i < 16; i++) { + ctx->words[i] = ntohl(block[i]); + } + /* now init the rest based on the SHA-1 formula, step b) */ + for (i = 16; i < 80; i++) { + ctx->words[i] = CSHIFT(1, ((ctx->words[(i - 3)]) ^ + (ctx->words[(i - 8)]) ^ + (ctx->words[(i - 14)]) ^ + (ctx->words[(i - 16)]))); + } + /* step c) */ + ctx->A = ctx->H0; + ctx->B = ctx->H1; + ctx->C = ctx->H2; + ctx->D = ctx->H3; + ctx->E = ctx->H4; + + /* step d) */ + for (i = 0; i < 80; i++) { + if (i < 20) { + ctx->TEMP = ((CSHIFT(5, ctx->A)) + + (F1(ctx->B, ctx->C, ctx->D)) + + (ctx->E) + + ctx->words[i] + + K1); + } else if (i < 40) { + ctx->TEMP = ((CSHIFT(5, ctx->A)) + + (F2(ctx->B, ctx->C, ctx->D)) + + (ctx->E) + + (ctx->words[i]) + + K2); + } else if (i < 60) { + ctx->TEMP = ((CSHIFT(5, ctx->A)) + + (F3(ctx->B, ctx->C, ctx->D)) + + (ctx->E) + + (ctx->words[i]) + + K3); + } else { + ctx->TEMP = ((CSHIFT(5, ctx->A)) + + (F4(ctx->B, ctx->C, ctx->D)) + + (ctx->E) + + (ctx->words[i]) + + K4); + } + ctx->E = ctx->D; + ctx->D = ctx->C; + ctx->C = CSHIFT(30, ctx->B); + ctx->B = ctx->A; + ctx->A = ctx->TEMP; + } + /* step e) */ + ctx->H0 = (ctx->H0) + (ctx->A); + ctx->H1 = (ctx->H1) + (ctx->B); + ctx->H2 = (ctx->H2) + (ctx->C); + ctx->H3 = (ctx->H3) + (ctx->D); + ctx->H4 = (ctx->H4) + (ctx->E); +} + +void +sctp_sha1_update(struct sctp_sha1_context *ctx, const unsigned char *ptr, unsigned int siz) +{ + unsigned int number_left, left_to_fill; + + number_left = siz; + while (number_left > 0) { + left_to_fill = sizeof(ctx->sha_block) - ctx->how_many_in_block; + if (left_to_fill > number_left) { + /* can only partially fill up this one */ + memcpy(&ctx->sha_block[ctx->how_many_in_block], + ptr, number_left); + ctx->how_many_in_block += number_left; + ctx->running_total += number_left; + break; + } else { + /* block is now full, process it */ + memcpy(&ctx->sha_block[ctx->how_many_in_block], + ptr, left_to_fill); + sctp_sha1_process_a_block(ctx, + (unsigned int *)ctx->sha_block); + number_left -= left_to_fill; + ctx->running_total += left_to_fill; + ctx->how_many_in_block = 0; + ptr = (const unsigned char *)(ptr + left_to_fill); + } + } +} + +void +sctp_sha1_final(unsigned char *digest, struct sctp_sha1_context *ctx) +{ + /* + * if any left in block fill with padding and process. Then transfer + * the digest to the pointer. At the last block some special rules + * need to apply. We must add a 1 bit following the message, then we + * pad with 0's. The total size is encoded as a 64 bit number at the + * end. Now if the last buffer has more than 55 octets in it we + * cannot fit the 64 bit number + 10000000 pad on the end and must + * add the 10000000 pad, pad the rest of the message with 0's and + * then create an all 0 message with just the 64 bit size at the end + * and run this block through by itself. Also the 64 bit int must + * be in network byte order. + */ + int left_to_fill; + unsigned int i, *ptr; + + if (ctx->how_many_in_block > 55) { + /* + * special case, we need to process two blocks here. One for + * the current stuff plus possibly the pad. The other for + * the size. + */ + left_to_fill = sizeof(ctx->sha_block) - ctx->how_many_in_block; + if (left_to_fill == 0) { + /* Should not really happen but I am paranoid */ + sctp_sha1_process_a_block(ctx, + (unsigned int *)ctx->sha_block); + /* init last block, a bit different than the rest */ + ctx->sha_block[0] = '\x80'; + for (i = 1; i < sizeof(ctx->sha_block); i++) { + ctx->sha_block[i] = 0x0; + } + } else if (left_to_fill == 1) { + ctx->sha_block[ctx->how_many_in_block] = '\x80'; + sctp_sha1_process_a_block(ctx, + (unsigned int *)ctx->sha_block); + /* init last block */ + memset(ctx->sha_block, 0, sizeof(ctx->sha_block)); + } else { + ctx->sha_block[ctx->how_many_in_block] = '\x80'; + for (i = (ctx->how_many_in_block + 1); + i < sizeof(ctx->sha_block); + i++) { + ctx->sha_block[i] = 0x0; + } + sctp_sha1_process_a_block(ctx, + (unsigned int *)ctx->sha_block); + /* init last block */ + memset(ctx->sha_block, 0, sizeof(ctx->sha_block)); + } + /* This is in bits so multiply by 8 */ + ctx->running_total *= 8; + ptr = (unsigned int *)&ctx->sha_block[60]; + *ptr = htonl(ctx->running_total); + sctp_sha1_process_a_block(ctx, (unsigned int *)ctx->sha_block); + } else { + /* + * easy case, we just pad this message to size - end with 0 + * add the magic 0x80 to the next word and then put the + * network byte order size in the last spot and process the + * block. + */ + ctx->sha_block[ctx->how_many_in_block] = '\x80'; + for (i = (ctx->how_many_in_block + 1); + i < sizeof(ctx->sha_block); + i++) { + ctx->sha_block[i] = 0x0; + } + /* get last int spot */ + ctx->running_total *= 8; + ptr = (unsigned int *)&ctx->sha_block[60]; + *ptr = htonl(ctx->running_total); + sctp_sha1_process_a_block(ctx, (unsigned int *)ctx->sha_block); + } + /* transfer the digest back to the user */ + digest[3] = (ctx->H0 & 0xff); + digest[2] = ((ctx->H0 >> 8) & 0xff); + digest[1] = ((ctx->H0 >> 16) & 0xff); + digest[0] = ((ctx->H0 >> 24) & 0xff); + + digest[7] = (ctx->H1 & 0xff); + digest[6] = ((ctx->H1 >> 8) & 0xff); + digest[5] = ((ctx->H1 >> 16) & 0xff); + digest[4] = ((ctx->H1 >> 24) & 0xff); + + digest[11] = (ctx->H2 & 0xff); + digest[10] = ((ctx->H2 >> 8) & 0xff); + digest[9] = ((ctx->H2 >> 16) & 0xff); + digest[8] = ((ctx->H2 >> 24) & 0xff); + + digest[15] = (ctx->H3 & 0xff); + digest[14] = ((ctx->H3 >> 8) & 0xff); + digest[13] = ((ctx->H3 >> 16) & 0xff); + digest[12] = ((ctx->H3 >> 24) & 0xff); + + digest[19] = (ctx->H4 & 0xff); + digest[18] = ((ctx->H4 >> 8) & 0xff); + digest[17] = ((ctx->H4 >> 16) & 0xff); + digest[16] = ((ctx->H4 >> 24) & 0xff); +} + +#endif |