version 0.3.33

[fms.git] / libs / libtomcrypt / pk / asn1 / der / printable_string / der_length_printable_string.c

diff --git a/libs/libtomcrypt/pk/asn1/der/printable_string/der_length_printable_string.c b/libs/libtomcrypt/pk/asn1/der/printable_string/der_length_printable_string.c
new file mode 100644 (file)
index 0000000..799b6b6
--- /dev/null
+++ b/libs/libtomcrypt/pk/asn1/der/printable_string/der_length_printable_string.c
@@ -0,0 +1,166 @@
+/* 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://libtomcrypt.com
+ */
+#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: 1.2 $ */
+/* $Date: 2006/03/31 14:15:35 $ */