--- /dev/null
+/* 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"
+#include <stdarg.h>
+
+
+/**
+ @file der_encode_sequence_ex.c
+ ASN.1 DER, encode a SEQUENCE, Tom St Denis
+*/
+
+#ifdef LTC_DER
+
+/**
+ Encode a SEQUENCE
+ @param list The list of items to encode
+ @param inlen The number of items in the list
+ @param out [out] The destination
+ @param outlen [in/out] The size of the output
+ @param type_of LTC_ASN1_SEQUENCE or LTC_ASN1_SET/LTC_ASN1_SETOF
+ @return CRYPT_OK on success
+*/
+int der_encode_sequence_ex(ltc_asn1_list *list, unsigned long inlen,
+ unsigned char *out, unsigned long *outlen, int type_of)
+{
+ int err, type;
+ unsigned long size, x, y, z, i;
+ void *data;
+
+ LTC_ARGCHK(list != NULL);
+ LTC_ARGCHK(out != NULL);
+ LTC_ARGCHK(outlen != NULL);
+
+ /* get size of output that will be required */
+ y = 0;
+ for (i = 0; i < inlen; i++) {
+ type = list[i].type;
+ size = list[i].size;
+ data = list[i].data;
+
+ if (type == LTC_ASN1_EOL) {
+ break;
+ }
+
+ switch (type) {
+ case LTC_ASN1_BOOLEAN:
+ if ((err = der_length_boolean(&x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_INTEGER:
+ if ((err = der_length_integer(data, &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_SHORT_INTEGER:
+ if ((err = der_length_short_integer(*((unsigned long*)data), &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_BIT_STRING:
+ if ((err = der_length_bit_string(size, &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_OCTET_STRING:
+ if ((err = der_length_octet_string(size, &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_NULL:
+ y += 2;
+ break;
+
+ case LTC_ASN1_OBJECT_IDENTIFIER:
+ if ((err = der_length_object_identifier(data, size, &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_IA5_STRING:
+ if ((err = der_length_ia5_string(data, size, &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_PRINTABLE_STRING:
+ if ((err = der_length_printable_string(data, size, &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_UTF8_STRING:
+ if ((err = der_length_utf8_string(data, size, &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_UTCTIME:
+ if ((err = der_length_utctime(data, &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ case LTC_ASN1_SET:
+ case LTC_ASN1_SETOF:
+ case LTC_ASN1_SEQUENCE:
+ if ((err = der_length_sequence(data, size, &x)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ y += x;
+ break;
+
+ default:
+ err = CRYPT_INVALID_ARG;
+ goto LBL_ERR;
+ }
+ }
+
+ /* calc header size */
+ z = y;
+ if (y < 128) {
+ y += 2;
+ } else if (y < 256) {
+ /* 0x30 0x81 LL */
+ y += 3;
+ } else if (y < 65536UL) {
+ /* 0x30 0x82 LL LL */
+ y += 4;
+ } else if (y < 16777216UL) {
+ /* 0x30 0x83 LL LL LL */
+ y += 5;
+ } else {
+ err = CRYPT_INVALID_ARG;
+ goto LBL_ERR;
+ }
+
+ /* too big ? */
+ if (*outlen < y) {
+ *outlen = y;
+ err = CRYPT_BUFFER_OVERFLOW;
+ goto LBL_ERR;
+ }
+
+ /* store header */
+ x = 0;
+ out[x++] = (type_of == LTC_ASN1_SEQUENCE) ? 0x30 : 0x31;
+
+ if (z < 128) {
+ out[x++] = (unsigned char)z;
+ } else if (z < 256) {
+ out[x++] = 0x81;
+ out[x++] = (unsigned char)z;
+ } else if (z < 65536UL) {
+ out[x++] = 0x82;
+ out[x++] = (unsigned char)((z>>8UL)&255);
+ out[x++] = (unsigned char)(z&255);
+ } else if (z < 16777216UL) {
+ out[x++] = 0x83;
+ out[x++] = (unsigned char)((z>>16UL)&255);
+ out[x++] = (unsigned char)((z>>8UL)&255);
+ out[x++] = (unsigned char)(z&255);
+ }
+
+ /* store data */
+ *outlen -= x;
+ for (i = 0; i < inlen; i++) {
+ type = list[i].type;
+ size = list[i].size;
+ data = list[i].data;
+
+ if (type == LTC_ASN1_EOL) {
+ break;
+ }
+
+ switch (type) {
+ case LTC_ASN1_BOOLEAN:
+ z = *outlen;
+ if ((err = der_encode_boolean(*((int *)data), out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_INTEGER:
+ z = *outlen;
+ if ((err = der_encode_integer(data, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_SHORT_INTEGER:
+ z = *outlen;
+ if ((err = der_encode_short_integer(*((unsigned long*)data), out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_BIT_STRING:
+ z = *outlen;
+ if ((err = der_encode_bit_string(data, size, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_OCTET_STRING:
+ z = *outlen;
+ if ((err = der_encode_octet_string(data, size, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_NULL:
+ out[x++] = 0x05;
+ out[x++] = 0x00;
+ *outlen -= 2;
+ break;
+
+ case LTC_ASN1_OBJECT_IDENTIFIER:
+ z = *outlen;
+ if ((err = der_encode_object_identifier(data, size, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_IA5_STRING:
+ z = *outlen;
+ if ((err = der_encode_ia5_string(data, size, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_PRINTABLE_STRING:
+ z = *outlen;
+ if ((err = der_encode_printable_string(data, size, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_UTF8_STRING:
+ z = *outlen;
+ if ((err = der_encode_utf8_string(data, size, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_UTCTIME:
+ z = *outlen;
+ if ((err = der_encode_utctime(data, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_SET:
+ z = *outlen;
+ if ((err = der_encode_set(data, size, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_SETOF:
+ z = *outlen;
+ if ((err = der_encode_setof(data, size, out + x, &z)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ case LTC_ASN1_SEQUENCE:
+ z = *outlen;
+ if ((err = der_encode_sequence_ex(data, size, out + x, &z, type)) != CRYPT_OK) {
+ goto LBL_ERR;
+ }
+ x += z;
+ *outlen -= z;
+ break;
+
+ default:
+ err = CRYPT_INVALID_ARG;
+ goto LBL_ERR;
+ }
+ }
+ *outlen = x;
+ err = CRYPT_OK;
+
+LBL_ERR:
+ return err;
+}
+
+#endif
projects / fms.git / blobdiff