diff options
Diffstat (limited to 'core/lib/libtomcrypt/src/pk/asn1/der/printable_string/der_length_printable_string.c')
| -rw-r--r-- | core/lib/libtomcrypt/src/pk/asn1/der/printable_string/der_length_printable_string.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/core/lib/libtomcrypt/src/pk/asn1/der/printable_string/der_length_printable_string.c b/core/lib/libtomcrypt/src/pk/asn1/der/printable_string/der_length_printable_string.c new file mode 100644 index 0000000..73cd8ee --- /dev/null +++ b/core/lib/libtomcrypt/src/pk/asn1/der/printable_string/der_length_printable_string.c @@ -0,0 +1,193 @@ +/* + * Copyright (c) 2001-2007, Tom St Denis + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. 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. + * + * 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 HOLDER 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. + */ + +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + * + * Tom St Denis, tomstdenis@gmail.com, http://libtom.org + */ +#include "tomcrypt.h" + +/** + @file der_length_printable_string.c + ASN.1 DER, get length of Printable STRING, Tom St Denis +*/ + +#ifdef LTC_DER + +static const struct { + int code, value; +} printable_table[] = { +{ ' ', 32 }, +{ '\'', 39 }, +{ '(', 40 }, +{ ')', 41 }, +{ '+', 43 }, +{ ',', 44 }, +{ '-', 45 }, +{ '.', 46 }, +{ '/', 47 }, +{ '0', 48 }, +{ '1', 49 }, +{ '2', 50 }, +{ '3', 51 }, +{ '4', 52 }, +{ '5', 53 }, +{ '6', 54 }, +{ '7', 55 }, +{ '8', 56 }, +{ '9', 57 }, +{ ':', 58 }, +{ '=', 61 }, +{ '?', 63 }, +{ 'A', 65 }, +{ 'B', 66 }, +{ 'C', 67 }, +{ 'D', 68 }, +{ 'E', 69 }, +{ 'F', 70 }, +{ 'G', 71 }, +{ 'H', 72 }, +{ 'I', 73 }, +{ 'J', 74 }, +{ 'K', 75 }, +{ 'L', 76 }, +{ 'M', 77 }, +{ 'N', 78 }, +{ 'O', 79 }, +{ 'P', 80 }, +{ 'Q', 81 }, +{ 'R', 82 }, +{ 'S', 83 }, +{ 'T', 84 }, +{ 'U', 85 }, +{ 'V', 86 }, +{ 'W', 87 }, +{ 'X', 88 }, +{ 'Y', 89 }, +{ 'Z', 90 }, +{ 'a', 97 }, +{ 'b', 98 }, +{ 'c', 99 }, +{ 'd', 100 }, +{ 'e', 101 }, +{ 'f', 102 }, +{ 'g', 103 }, +{ 'h', 104 }, +{ 'i', 105 }, +{ 'j', 106 }, +{ 'k', 107 }, +{ 'l', 108 }, +{ 'm', 109 }, +{ 'n', 110 }, +{ 'o', 111 }, +{ 'p', 112 }, +{ 'q', 113 }, +{ 'r', 114 }, +{ 's', 115 }, +{ 't', 116 }, +{ 'u', 117 }, +{ 'v', 118 }, +{ 'w', 119 }, +{ 'x', 120 }, +{ 'y', 121 }, +{ 'z', 122 }, +}; + +int der_printable_char_encode(int c) +{ + int x; + for (x = 0; x < (int)(sizeof(printable_table)/sizeof(printable_table[0])); x++) { + if (printable_table[x].code == c) { + return printable_table[x].value; + } + } + return -1; +} + +int der_printable_value_decode(int v) +{ + int x; + for (x = 0; x < (int)(sizeof(printable_table)/sizeof(printable_table[0])); x++) { + if (printable_table[x].value == v) { + return printable_table[x].code; + } + } + return -1; +} + +/** + Gets length of DER encoding of Printable STRING + @param octets The values you want to encode + @param noctets The number of octets in the string to encode + @param outlen [out] The length of the DER encoding for the given string + @return CRYPT_OK if successful +*/ +int der_length_printable_string(const unsigned char *octets, unsigned long noctets, unsigned long *outlen) +{ + unsigned long x; + + LTC_ARGCHK(outlen != NULL); + LTC_ARGCHK(octets != NULL); + + /* scan string for validity */ + for (x = 0; x < noctets; x++) { + if (der_printable_char_encode(octets[x]) == -1) { + return CRYPT_INVALID_ARG; + } + } + + if (noctets < 128) { + /* 16 LL DD DD DD ... */ + *outlen = 2 + noctets; + } else if (noctets < 256) { + /* 16 81 LL DD DD DD ... */ + *outlen = 3 + noctets; + } else if (noctets < 65536UL) { + /* 16 82 LL LL DD DD DD ... */ + *outlen = 4 + noctets; + } else if (noctets < 16777216UL) { + /* 16 83 LL LL LL DD DD DD ... */ + *outlen = 5 + noctets; + } else { + return CRYPT_INVALID_ARG; + } + + return CRYPT_OK; +} + +#endif + + +/* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/printable_string/der_length_printable_string.c,v $ */ +/* $Revision: 1.3 $ */ +/* $Date: 2006/12/28 01:27:24 $ */ |