diff options
Diffstat (limited to 'util/md2.h')
| -rw-r--r-- | util/md2.h | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/util/md2.h b/util/md2.h new file mode 100644 index 0000000..29c77fd --- /dev/null +++ b/util/md2.h @@ -0,0 +1,269 @@ +/* + * md2.h + * Used in ipmilan.c + * + * 05/26/2006 ARCress - copied from freeipmi ipmi-md2.c, + * added md2_sum() subroutine, added WIN32 flag + * 08/14/2008 ARCress - moved md2 routines from md2.c to md2.h + */ +/* + Copyright (C) 2003 FreeIPMI Core Team + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + A copy of the GNU General Public License is available as + /usr/share/common-licenses/GPL-2 in the Debian distribution or on + the World Wide Web at http://www.gnu.org/copyleft/gpl.html. You can + also obtain it by writing to the Free Software Foundation, Inc., + 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. + +*/ + +/* only include this file if MD2OK was defined */ + +#ifdef WIN32 +#define u_int32_t unsigned int +#define u_int8_t unsigned char +#endif +/* start ipmi-md2.h */ +#define IPMI_MD2_BLOCK_LEN 16 +#define IPMI_MD2_BUFFER_LEN 48 +#define IPMI_MD2_CHKSUM_LEN 16 +#define IPMI_MD2_DIGEST_LEN 16 +#define IPMI_MD2_PADDING_LEN 16 +#define IPMI_MD2_ROUNDS_LEN 18 + +typedef struct __md2 { + u_int32_t magic; + u_int8_t l; + unsigned int mlen; + u_int8_t x[IPMI_MD2_BUFFER_LEN]; + u_int8_t c[IPMI_MD2_CHKSUM_LEN]; + u_int8_t m[IPMI_MD2_BLOCK_LEN]; +} ipmi_md2_t; + +int ipmi_md2_init(ipmi_md2_t *ctx); +int ipmi_md2_update_data(ipmi_md2_t *ctx, u_int8_t *buf, unsigned int buflen); +int ipmi_md2_finish(ipmi_md2_t *ctx, u_int8_t *digest, unsigned int digestlen); +/* end ipmi-md2.h */ + +static char padding[16][16] = + { + {0x01}, + {0x02,0x02}, + {0x03,0x03,0x03}, + {0x04,0x04,0x04,0x04}, + {0x05,0x05,0x05,0x05,0x05}, + {0x06,0x06,0x06,0x06,0x06,0x06}, + {0x07,0x07,0x07,0x07,0x07,0x07,0x07}, + {0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08}, + {0x09,0x09,0x09,0x09,0x09,0x09,0x09,0x09,0x09}, + {0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A}, + {0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B}, + {0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C}, + {0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D,0x0D}, + {0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E}, + {0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F,0x0F}, + {0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10} + }; + +static unsigned char S[256] = + { + 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, + 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, + 0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, + 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA, + 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, + 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, + 0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, + 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A, + 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, + 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21, + 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, + 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, + 0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, + 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6, + 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, + 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, + 0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, + 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02, + 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, + 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F, + 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, + 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, + 0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, + 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52, + 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, + 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, + 0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, + 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39, + 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, + 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A, + 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, + 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14 + }; + +#define L ctx->l +#define X ctx->x +#define C ctx->c +#define M ctx->m +#define Mlen ctx->mlen +#define IPMI_MD2_MAGIC 0xf00fd00d + +int +ipmi_md2_init(ipmi_md2_t *ctx) +{ + + if (ctx == NULL) + { + errno = EINVAL; + return -1; + } + + ctx->magic = IPMI_MD2_MAGIC; + + L = 0; + Mlen = 0; + memset(X, '\0', IPMI_MD2_BUFFER_LEN); + memset(C, '\0', IPMI_MD2_CHKSUM_LEN); + memset(M, '\0', IPMI_MD2_BLOCK_LEN); + + return 0; +} + +static void +_ipmi_md2_update_digest_and_checksum(ipmi_md2_t *ctx) +{ + int j, k; + u_int8_t c, t; + + /* Update X */ + + for (j = 0; j < IPMI_MD2_BLOCK_LEN; j++) + { + X[16+j] = M[j]; + X[32+j] = (X[16+j] ^ X[j]); + } + + t = 0; + + for (j = 0; j < IPMI_MD2_ROUNDS_LEN; j++) + { + for (k = 0; k < IPMI_MD2_BUFFER_LEN; k++) + { + t = X[k] = (X[k] ^ S[t]); + } + t = (t + j) % 256; + } + + /* Update C and L */ + + /* achu: Note that there is a typo in the RFC 1319 specification. + * In section 3.2, the line: + * + * Set C[j] to S[c xor L] + * + * should read: + * + * Set C[j] to C[j] xor S[c xor L]. + */ + + for (j = 0; j < IPMI_MD2_BLOCK_LEN; j++) + { + c = M[j]; + C[j] = C[j] ^ S[c ^ L]; + L = C[j]; + } +} + +int +ipmi_md2_update_data(ipmi_md2_t *ctx, u_int8_t *buf, unsigned int buflen) +{ + + if (ctx == NULL || ctx->magic != IPMI_MD2_MAGIC || buf == NULL) + { + errno = EINVAL; + return -1; + } + + if (buflen == 0) + return 0; + + if ((Mlen + buflen) >= IPMI_MD2_BLOCK_LEN) + { + unsigned int bufcount; + + bufcount = (IPMI_MD2_BLOCK_LEN - Mlen); + memcpy(M + Mlen, buf, bufcount); + _ipmi_md2_update_digest_and_checksum(ctx); + + while ((buflen - bufcount) >= IPMI_MD2_BLOCK_LEN) + { + memcpy(M, buf + bufcount, IPMI_MD2_BLOCK_LEN); + bufcount += IPMI_MD2_BLOCK_LEN; + _ipmi_md2_update_digest_and_checksum(ctx); + } + + Mlen = buflen - bufcount; + if (Mlen > 0) + memcpy(M, buf + bufcount, Mlen); + } + else + { + /* Not enough data to update X and C, just copy in data */ + memcpy(M + Mlen, buf, buflen); + Mlen += buflen; + } + + return buflen; +} + +static void +_ipmi_md2_append_padding_and_checksum(ipmi_md2_t *ctx) +{ + unsigned int padlen; + int padindex; + + padlen = IPMI_MD2_PADDING_LEN - Mlen; + padindex = padlen - 1; + + ipmi_md2_update_data(ctx, padding[padindex], padlen); + + ipmi_md2_update_data(ctx, C, IPMI_MD2_CHKSUM_LEN); +} + +int +ipmi_md2_finish(ipmi_md2_t *ctx, u_int8_t *digest, unsigned int digestlen) +{ + + if (ctx == NULL || ctx->magic != IPMI_MD2_MAGIC + || digest == NULL || digestlen < IPMI_MD2_DIGEST_LEN) + { + errno = EINVAL; + return -1; + } + + _ipmi_md2_append_padding_and_checksum(ctx); + memcpy(digest, X, IPMI_MD2_DIGEST_LEN); + + return IPMI_MD2_DIGEST_LEN; +} + +/* added - ARCress */ +void md2_sum(unsigned char *pdata, int sdata, unsigned char *digest) +{ + ipmi_md2_t ctx; + + ipmi_md2_init(&ctx); + ipmi_md2_update_data(&ctx, pdata, sdata); + ipmi_md2_finish(&ctx, digest, 16); +} +/*end md2.h */ |