diff options
Diffstat (limited to 'package/network/services/ead/src/tinysrp/t_conv.c')
| -rw-r--r-- | package/network/services/ead/src/tinysrp/t_conv.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/package/network/services/ead/src/tinysrp/t_conv.c b/package/network/services/ead/src/tinysrp/t_conv.c new file mode 100644 index 0000000..3be6d85 --- /dev/null +++ b/package/network/services/ead/src/tinysrp/t_conv.c @@ -0,0 +1,226 @@ +/* + * Copyright (c) 1997-1999 The Stanford SRP Authentication Project + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, + * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * + * IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INCIDENTAL, + * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER + * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF + * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT + * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * In addition, the following conditions apply: + * + * 1. Any software that incorporates the SRP authentication technology + * must display the following acknowlegment: + * "This product uses the 'Secure Remote Password' cryptographic + * authentication system developed by Tom Wu (tjw@CS.Stanford.EDU)." + * + * 2. Any software that incorporates all or part of the SRP distribution + * itself must also display the following acknowledgment: + * "This product includes software developed by Tom Wu and Eugene + * Jhong for the SRP Distribution (http://srp.stanford.edu/srp/)." + * + * 3. Redistributions in source or binary form must retain an intact copy + * of this copyright notice and list of conditions. + */ + +/*#define _POSIX_SOURCE*/ +#include <stdio.h> +#include "t_defines.h" + +static int +hexDigitToInt(c) + char c; +{ + if(c >= '0' && c <= '9') + return c - '0'; + else if(c >= 'a' && c <= 'f') + return c - 'a' + 10; + else if(c >= 'A' && c <= 'F') + return c - 'A' + 10; + else + return 0; +} + +/* + * Convert a hex string to a string of bytes; return size of dst + */ +_TYPE( int ) +t_fromhex(dst, src) + register char *dst, *src; +{ + register char *chp = dst; + register unsigned size = strlen(src); + + /* FIXME: handle whitespace and non-hex digits by setting size and src + appropriately. */ + + if(size % 2 == 1) { + *chp++ = hexDigitToInt(*src++); + --size; + } + while(size > 0) { + *chp++ = (hexDigitToInt(*src) << 4) | hexDigitToInt(*(src + 1)); + src += 2; + size -= 2; + } + return chp - dst; +} + +/* + * Convert a string of bytes to their hex representation + */ +_TYPE( char * ) +t_tohex(dst, src, size) + register char *dst, *src; + register unsigned size; +{ + int notleading = 0; + + register char *chp = dst; + if (size != 0) do { + if(notleading || *src != '\0') { + notleading = 1; + sprintf(chp, "%.2x", * (unsigned char *) src); + chp += 2; + } + ++src; + } while (--size != 0); + return dst; +} + +static char b64table[] = + "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz./"; + +/* + * Convert a base64 string into raw byte array representation. + */ +_TYPE( int ) +t_fromb64(dst, src) + register char *dst, *src; +{ + unsigned char *a; + char *loc; + int i, j; + unsigned int size; + + while(*src && (*src == ' ' || *src == '\t' || *src == '\n')) + ++src; + size = strlen(src); + + a = malloc((size + 1) * sizeof(unsigned char)); + if(a == (unsigned char *) 0) + return -1; + + i = 0; + while(i < size) { + loc = strchr(b64table, src[i]); + if(loc == (char *) 0) + break; + else + a[i] = loc - b64table; + ++i; + } + size = i; + + i = size - 1; + j = size; + while(1) { + a[j] = a[i]; + if(--i < 0) + break; + a[j] |= (a[i] & 3) << 6; + --j; + a[j] = (unsigned char) ((a[i] & 0x3c) >> 2); + if(--i < 0) + break; + a[j] |= (a[i] & 0xf) << 4; + --j; + a[j] = (unsigned char) ((a[i] & 0x30) >> 4); + if(--i < 0) + break; + a[j] |= (a[i] << 2); + + a[--j] = 0; + if(--i < 0) + break; + } + + while(j <= size && a[j] == 0) + ++j; + + memcpy(dst, a + j, size - j + 1); + free(a); + return size - j + 1; +} + +/* + * Convert a raw byte string into a null-terminated base64 ASCII string. + */ +_TYPE( char * ) +t_tob64(dst, src, size) + register char *dst, *src; + register unsigned size; +{ + int c, pos = size % 3; + unsigned char b0 = 0, b1 = 0, b2 = 0, notleading = 0; + char *olddst = dst; + + switch(pos) { + case 1: + b2 = src[0]; + break; + case 2: + b1 = src[0]; + b2 = src[1]; + break; + } + + while(1) { + c = (b0 & 0xfc) >> 2; + if(notleading || c != 0) { + *dst++ = b64table[c]; + notleading = 1; + } + c = ((b0 & 3) << 4) | ((b1 & 0xf0) >> 4); + if(notleading || c != 0) { + *dst++ = b64table[c]; + notleading = 1; + } + c = ((b1 & 0xf) << 2) | ((b2 & 0xc0) >> 6); + if(notleading || c != 0) { + *dst++ = b64table[c]; + notleading = 1; + } + c = b2 & 0x3f; + if(notleading || c != 0) { + *dst++ = b64table[c]; + notleading = 1; + } + if(pos >= size) + break; + else { + b0 = src[pos++]; + b1 = src[pos++]; + b2 = src[pos++]; + } + } + + *dst++ = '\0'; + return olddst; +} |