diff src/pk/asn1/der/sequence/der_decode_sequence_multi.c @ 209:39d5d58461d6 libtomcrypt-orig LTC_1.05

Import of libtomcrypt 1.05
author Matt Johnston <matt@ucc.asn.au>
date Wed, 06 Jul 2005 03:53:40 +0000
parents
children d5faf4814ddb
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pk/asn1/der/sequence/der_decode_sequence_multi.c	Wed Jul 06 03:53:40 2005 +0000
@@ -0,0 +1,124 @@
+/* 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, [email protected], http://libtomcrypt.org
+ */
+#include "tomcrypt.h"
+#include <stdarg.h>
+
+
+/**
+  @file der_decode_sequence_multi.c
+  ASN.1 DER, decode a SEQUENCE, Tom St Denis
+*/
+
+#ifdef LTC_DER
+
+int der_decode_sequence_multi(const unsigned char *in, unsigned long inlen, ...)
+{
+   int           err, type;
+   unsigned long size, x;
+   void          *data;
+   va_list       args;
+   ltc_asn1_list *list;
+
+   LTC_ARGCHK(in    != NULL);
+
+   /* get size of output that will be required */
+   va_start(args, inlen);
+   x = 0;
+   for (;;) {
+       type = va_arg(args, int);
+       size = va_arg(args, unsigned long);
+       data = va_arg(args, void*);
+
+       if (type == LTC_ASN1_EOL) { 
+          break;
+       }
+
+       switch (type) {
+           case LTC_ASN1_INTEGER:
+           case LTC_ASN1_SHORT_INTEGER:
+           case LTC_ASN1_BIT_STRING:
+           case LTC_ASN1_OCTET_STRING:
+           case LTC_ASN1_NULL:
+           case LTC_ASN1_OBJECT_IDENTIFIER:
+           case LTC_ASN1_IA5_STRING:
+           case LTC_ASN1_PRINTABLE_STRING:
+           case LTC_ASN1_UTCTIME:
+           case LTC_ASN1_SEQUENCE:
+           case LTC_ASN1_CHOICE:
+                ++x; 
+                break;
+          
+           default:
+               va_end(args);
+               return CRYPT_INVALID_ARG;
+       }
+   }
+   va_end(args);
+
+   /* allocate structure for x elements */
+   if (x == 0) {
+      return CRYPT_NOP;
+   }
+
+   list = XCALLOC(sizeof(*list), x);
+   if (list == NULL) {
+      return CRYPT_MEM;
+   }
+
+   /* fill in the structure */
+   va_start(args, inlen);
+   x = 0;
+   for (;;) {
+       type = va_arg(args, int);
+       size = va_arg(args, unsigned long);
+       data = va_arg(args, void*);
+
+       if (type == LTC_ASN1_EOL) { 
+          break;
+       }
+
+       switch (type) {
+           case LTC_ASN1_INTEGER:
+           case LTC_ASN1_SHORT_INTEGER:
+           case LTC_ASN1_BIT_STRING:
+           case LTC_ASN1_OCTET_STRING:
+           case LTC_ASN1_NULL:
+           case LTC_ASN1_OBJECT_IDENTIFIER:
+           case LTC_ASN1_IA5_STRING:
+           case LTC_ASN1_PRINTABLE_STRING:
+           case LTC_ASN1_UTCTIME:
+           case LTC_ASN1_SEQUENCE:
+           case LTC_ASN1_CHOICE:
+                list[x].type   = type;
+                list[x].size   = size;
+                list[x++].data = data;
+                break;
+         
+           default:
+               va_end(args);
+               err = CRYPT_INVALID_ARG;
+               goto LBL_ERR;
+       }
+   }
+   va_end(args);
+
+   err = der_decode_sequence(in, inlen, list, x);
+LBL_ERR:
+   XFREE(list);
+   return err;
+}
+
+#endif
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/sequence/der_decode_sequence_multi.c,v $ */
+/* $Revision: 1.7 $ */
+/* $Date: 2005/06/18 19:20:23 $ */