version 0.3.33

[fms.git] / libs / libtomcrypt / pk / asn1 / der / ia5 / der_encode_ia5_string.c

diff --git a/libs/libtomcrypt/pk/asn1/der/ia5/der_encode_ia5_string.c b/libs/libtomcrypt/pk/asn1/der/ia5/der_encode_ia5_string.c
new file mode 100644 (file)
index 0000000..aff3392
--- /dev/null
+++ b/libs/libtomcrypt/pk/asn1/der/ia5/der_encode_ia5_string.c
@@ -0,0 +1,85 @@
+/* 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_encode_ia5_string.c
+  ASN.1 DER, encode a IA5 STRING, Tom St Denis
+*/
+
+#ifdef LTC_DER
+
+/**
+  Store an IA5 STRING
+  @param in       The array of IA5 to store (one per char)
+  @param inlen    The number of IA5 to store
+  @param out      [out] The destination for the DER encoded IA5 STRING
+  @param outlen   [in/out] The max size and resulting size of the DER IA5 STRING
+  @return CRYPT_OK if successful
+*/
+int der_encode_ia5_string(const unsigned char *in, unsigned long inlen,
+                                unsigned char *out, unsigned long *outlen)
+{
+   unsigned long x, y, len;
+   int           err;
+
+   LTC_ARGCHK(in     != NULL);
+   LTC_ARGCHK(out    != NULL);
+   LTC_ARGCHK(outlen != NULL);
+
+   /* get the size */
+   if ((err = der_length_ia5_string(in, inlen, &len)) != CRYPT_OK) {
+      return err; 
+   }
+
+   /* too big? */
+   if (len > *outlen) {
+      *outlen = len;
+      return CRYPT_BUFFER_OVERFLOW;
+   }
+
+   /* encode the header+len */
+   x = 0;
+   out[x++] = 0x16;
+   if (inlen < 128) {
+      out[x++] = (unsigned char)inlen;
+   } else if (inlen < 256) {
+      out[x++] = 0x81;
+      out[x++] = (unsigned char)inlen;
+   } else if (inlen < 65536UL) {
+      out[x++] = 0x82;
+      out[x++] = (unsigned char)((inlen>>8)&255);
+      out[x++] = (unsigned char)(inlen&255);
+   } else if (inlen < 16777216UL) {
+      out[x++] = 0x83;
+      out[x++] = (unsigned char)((inlen>>16)&255);
+      out[x++] = (unsigned char)((inlen>>8)&255);
+      out[x++] = (unsigned char)(inlen&255);
+   } else {
+      return CRYPT_INVALID_ARG;
+   }
+
+   /* store octets */
+   for (y = 0; y < inlen; y++) {
+       out[x++] = der_ia5_char_encode(in[y]);
+   }
+
+   /* retun length */
+   *outlen = x;
+
+   return CRYPT_OK;
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/ia5/der_encode_ia5_string.c,v $ */
+/* $Revision: 1.4 $ */
+/* $Date: 2006/12/04 21:34:03 $ */