Backport of CMS code to 0.9.8-stable branch. Disabled by default.

26 files changed, 7313 insertions, 71 deletions

diff --git a/crypto/asn1/Makefile b/crypto/asn1/Makefile
index f67c5ebd71..98efa23c31 100644
--- a/crypto/asn1/Makefile
+++ b/crypto/asn1/Makefile
@@ -26,7 +26,7 @@ LIBSRC=	a_object.c a_bitstr.c a_utctm.c a_gentm.c a_time.c a_int.c a_octet.c \
 	t_req.c t_x509.c t_x509a.c t_crl.c t_pkey.c t_spki.c t_bitst.c \
 	tasn_new.c tasn_fre.c tasn_enc.c tasn_dec.c tasn_utl.c tasn_typ.c \
 	f_int.c f_string.c n_pkey.c \
-	f_enum.c a_hdr.c x_pkey.c a_bool.c x_exten.c \
+	f_enum.c a_hdr.c x_pkey.c a_bool.c x_exten.c asn_mime.c \
 	asn1_gen.c asn1_par.c asn1_lib.c asn1_err.c a_meth.c a_bytes.c a_strnid.c \
 	evp_asn1.c asn_pack.c p5_pbe.c p5_pbev2.c p8_pkey.c asn_moid.c
 LIBOBJ= a_object.o a_bitstr.o a_utctm.o a_gentm.o a_time.o a_int.o a_octet.o \
@@ -38,7 +38,7 @@ LIBOBJ= a_object.o a_bitstr.o a_utctm.o a_gentm.o a_time.o a_int.o a_octet.o \
 	t_req.o t_x509.o t_x509a.o t_crl.o t_pkey.o t_spki.o t_bitst.o \
 	tasn_new.o tasn_fre.o tasn_enc.o tasn_dec.o tasn_utl.o tasn_typ.o \
 	f_int.o f_string.o n_pkey.o \
-	f_enum.o a_hdr.o x_pkey.o a_bool.o x_exten.o \
+	f_enum.o a_hdr.o x_pkey.o a_bool.o x_exten.o asn_mime.o \
 	asn1_gen.o asn1_par.o asn1_lib.o asn1_err.o a_meth.o a_bytes.o a_strnid.o \
 	evp_asn1.o asn_pack.o p5_pbe.o p5_pbev2.o p8_pkey.o asn_moid.o
 
diff --git a/crypto/asn1/asn1.h b/crypto/asn1/asn1.h
index fdcc33a5dd..7a7338c204 100644
--- a/crypto/asn1/asn1.h
+++ b/crypto/asn1/asn1.h
@@ -158,6 +158,10 @@ extern "C" {
 #define MBSTRING_BMP		(MBSTRING_FLAG|2)
 #define MBSTRING_UNIV		(MBSTRING_FLAG|4)
 
+#define SMIME_OLDMIME		0x400
+#define SMIME_CRLFEOL		0x800
+#define SMIME_STREAM		0x1000
+
 struct X509_algor_st;
 DECLARE_STACK_OF(X509_ALGOR)
 
@@ -219,6 +223,13 @@ typedef struct asn1_object_st
  * be inserted in the memory buffer 
  */
 #define ASN1_STRING_FLAG_NDEF 0x010 
+
+/* This flag is used by the CMS code to indicate that a string is not
+ * complete and is a place holder for content when it had all been 
+ * accessed. The flag will be reset when content has been written to it.
+ */
+#define ASN1_STRING_FLAG_CONT 0x020 
+
 /* This is the base type that holds just about everything :-) */
 typedef struct asn1_string_st
 	{
@@ -1064,6 +1075,16 @@ void ASN1_add_oid_module(void);
 
 ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf);
 ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf);
+
+typedef int asn1_output_data_fn(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
+					const ASN1_ITEM *it);
+
+int int_smime_write_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags,
+				int ctype_nid, int econt_nid,
+				STACK_OF(X509_ALGOR) *mdalgs,
+				asn1_output_data_fn *data_fn,
+				const ASN1_ITEM *it);
+ASN1_VALUE *SMIME_read_ASN1(BIO *bio, BIO **bcont, const ASN1_ITEM *it);
 	
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes
@@ -1114,6 +1135,7 @@ void ERR_load_ASN1_strings(void);
 #define ASN1_F_ASN1_ITEM_VERIFY				 197
 #define ASN1_F_ASN1_MBSTRING_NCOPY			 122
 #define ASN1_F_ASN1_OBJECT_NEW				 123
+#define ASN1_F_ASN1_OUTPUT_DATA				 207
 #define ASN1_F_ASN1_PACK_STRING				 124
 #define ASN1_F_ASN1_PCTX_NEW				 205
 #define ASN1_F_ASN1_PKCS5_PBE_SET			 125
@@ -1133,6 +1155,8 @@ void ERR_load_ASN1_strings(void);
 #define ASN1_F_ASN1_UNPACK_STRING			 136
 #define ASN1_F_ASN1_UTCTIME_SET				 187
 #define ASN1_F_ASN1_VERIFY				 137
+#define ASN1_F_B64_READ_ASN1				 208
+#define ASN1_F_B64_WRITE_ASN1				 209
 #define ASN1_F_BITSTR_CB				 180
 #define ASN1_F_BN_TO_ASN1_ENUMERATED			 138
 #define ASN1_F_BN_TO_ASN1_INTEGER			 139
@@ -1173,6 +1197,8 @@ void ERR_load_ASN1_strings(void);
 #define ASN1_F_PARSE_TAGGING				 182
 #define ASN1_F_PKCS5_PBE2_SET				 167
 #define ASN1_F_PKCS5_PBE_SET				 202
+#define ASN1_F_SMIME_READ_ASN1				 210
+#define ASN1_F_SMIME_TEXT				 211
 #define ASN1_F_X509_CINF_NEW				 168
 #define ASN1_F_X509_CRL_ADD0_REVOKED			 169
 #define ASN1_F_X509_INFO_NEW				 170
@@ -1184,6 +1210,8 @@ void ERR_load_ASN1_strings(void);
 
 /* Reason codes. */
 #define ASN1_R_ADDING_OBJECT				 171
+#define ASN1_R_ASN1_PARSE_ERROR				 198
+#define ASN1_R_ASN1_SIG_PARSE_ERROR			 199
 #define ASN1_R_AUX_ERROR				 100
 #define ASN1_R_BAD_CLASS				 101
 #define ASN1_R_BAD_OBJECT_HEADER			 102
@@ -1230,6 +1258,7 @@ void ERR_load_ASN1_strings(void);
 #define ASN1_R_INTEGER_TOO_LARGE_FOR_LONG		 128
 #define ASN1_R_INVALID_BMPSTRING_LENGTH			 129
 #define ASN1_R_INVALID_DIGIT				 130
+#define ASN1_R_INVALID_MIME_TYPE			 200
 #define ASN1_R_INVALID_MODIFIER				 186
 #define ASN1_R_INVALID_NUMBER				 187
 #define ASN1_R_INVALID_SEPARATOR			 131
@@ -1239,6 +1268,9 @@ void ERR_load_ASN1_strings(void);
 #define ASN1_R_IV_TOO_LARGE				 135
 #define ASN1_R_LENGTH_ERROR				 136
 #define ASN1_R_LIST_ERROR				 188
+#define ASN1_R_MIME_NO_CONTENT_TYPE			 201
+#define ASN1_R_MIME_PARSE_ERROR				 202
+#define ASN1_R_MIME_SIG_PARSE_ERROR			 203
 #define ASN1_R_MISSING_EOC				 137
 #define ASN1_R_MISSING_SECOND_NUMBER			 138
 #define ASN1_R_MISSING_VALUE				 189
@@ -1248,7 +1280,11 @@ void ERR_load_ASN1_strings(void);
 #define ASN1_R_NON_HEX_CHARACTERS			 141
 #define ASN1_R_NOT_ASCII_FORMAT				 190
 #define ASN1_R_NOT_ENOUGH_DATA				 142
+#define ASN1_R_NO_CONTENT_TYPE				 204
 #define ASN1_R_NO_MATCHING_CHOICE_TYPE			 143
+#define ASN1_R_NO_MULTIPART_BODY_FAILURE		 205
+#define ASN1_R_NO_MULTIPART_BOUNDARY			 206
+#define ASN1_R_NO_SIG_CONTENT_TYPE			 207
 #define ASN1_R_NULL_IS_WRONG_LENGTH			 144
 #define ASN1_R_OBJECT_NOT_ASCII_FORMAT			 191
 #define ASN1_R_ODD_NUMBER_OF_CHARS			 145
@@ -1258,6 +1294,8 @@ void ERR_load_ASN1_strings(void);
 #define ASN1_R_SEQUENCE_NOT_CONSTRUCTED			 149
 #define ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG		 192
 #define ASN1_R_SHORT_LINE				 150
+#define ASN1_R_SIG_INVALID_MIME_TYPE			 208
+#define ASN1_R_STREAMING_NOT_SUPPORTED			 209
 #define ASN1_R_STRING_TOO_LONG				 151
 #define ASN1_R_STRING_TOO_SHORT				 152
 #define ASN1_R_TAG_VALUE_TOO_HIGH			 153
diff --git a/crypto/asn1/asn1_err.c b/crypto/asn1/asn1_err.c
index f6b5c3f3dd..f8a3e2e6cd 100644
--- a/crypto/asn1/asn1_err.c
+++ b/crypto/asn1/asn1_err.c
@@ -1,6 +1,6 @@
 /* crypto/asn1/asn1_err.c */
 /* ====================================================================
- * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1999-2008 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -110,6 +110,7 @@ static ERR_STRING_DATA ASN1_str_functs[]=
 {ERR_FUNC(ASN1_F_ASN1_ITEM_VERIFY),	"ASN1_item_verify"},
 {ERR_FUNC(ASN1_F_ASN1_MBSTRING_NCOPY),	"ASN1_mbstring_ncopy"},
 {ERR_FUNC(ASN1_F_ASN1_OBJECT_NEW),	"ASN1_OBJECT_new"},
+{ERR_FUNC(ASN1_F_ASN1_OUTPUT_DATA),	"ASN1_OUTPUT_DATA"},
 {ERR_FUNC(ASN1_F_ASN1_PACK_STRING),	"ASN1_pack_string"},
 {ERR_FUNC(ASN1_F_ASN1_PCTX_NEW),	"ASN1_PCTX_NEW"},
 {ERR_FUNC(ASN1_F_ASN1_PKCS5_PBE_SET),	"ASN1_PKCS5_PBE_SET"},
@@ -129,6 +130,8 @@ static ERR_STRING_DATA ASN1_str_functs[]=
 {ERR_FUNC(ASN1_F_ASN1_UNPACK_STRING),	"ASN1_unpack_string"},
 {ERR_FUNC(ASN1_F_ASN1_UTCTIME_SET),	"ASN1_UTCTIME_set"},
 {ERR_FUNC(ASN1_F_ASN1_VERIFY),	"ASN1_verify"},
+{ERR_FUNC(ASN1_F_B64_READ_ASN1),	"B64_READ_ASN1"},
+{ERR_FUNC(ASN1_F_B64_WRITE_ASN1),	"B64_WRITE_ASN1"},
 {ERR_FUNC(ASN1_F_BITSTR_CB),	"BITSTR_CB"},
 {ERR_FUNC(ASN1_F_BN_TO_ASN1_ENUMERATED),	"BN_to_ASN1_ENUMERATED"},
 {ERR_FUNC(ASN1_F_BN_TO_ASN1_INTEGER),	"BN_to_ASN1_INTEGER"},
@@ -169,6 +172,8 @@ static ERR_STRING_DATA ASN1_str_functs[]=
 {ERR_FUNC(ASN1_F_PARSE_TAGGING),	"PARSE_TAGGING"},
 {ERR_FUNC(ASN1_F_PKCS5_PBE2_SET),	"PKCS5_pbe2_set"},
 {ERR_FUNC(ASN1_F_PKCS5_PBE_SET),	"PKCS5_pbe_set"},
+{ERR_FUNC(ASN1_F_SMIME_READ_ASN1),	"SMIME_read_ASN1"},
+{ERR_FUNC(ASN1_F_SMIME_TEXT),	"SMIME_text"},
 {ERR_FUNC(ASN1_F_X509_CINF_NEW),	"X509_CINF_NEW"},
 {ERR_FUNC(ASN1_F_X509_CRL_ADD0_REVOKED),	"X509_CRL_add0_revoked"},
 {ERR_FUNC(ASN1_F_X509_INFO_NEW),	"X509_INFO_new"},
@@ -183,6 +188,8 @@ static ERR_STRING_DATA ASN1_str_functs[]=
 static ERR_STRING_DATA ASN1_str_reasons[]=
 	{
 {ERR_REASON(ASN1_R_ADDING_OBJECT)        ,"adding object"},
+{ERR_REASON(ASN1_R_ASN1_PARSE_ERROR)     ,"asn1 parse error"},
+{ERR_REASON(ASN1_R_ASN1_SIG_PARSE_ERROR) ,"asn1 sig parse error"},
 {ERR_REASON(ASN1_R_AUX_ERROR)            ,"aux error"},
 {ERR_REASON(ASN1_R_BAD_CLASS)            ,"bad class"},
 {ERR_REASON(ASN1_R_BAD_OBJECT_HEADER)    ,"bad object header"},
@@ -229,6 +236,7 @@ static ERR_STRING_DATA ASN1_str_reasons[]=
 {ERR_REASON(ASN1_R_INTEGER_TOO_LARGE_FOR_LONG),"integer too large for long"},
 {ERR_REASON(ASN1_R_INVALID_BMPSTRING_LENGTH),"invalid bmpstring length"},
 {ERR_REASON(ASN1_R_INVALID_DIGIT)        ,"invalid digit"},
+{ERR_REASON(ASN1_R_INVALID_MIME_TYPE)    ,"invalid mime type"},
 {ERR_REASON(ASN1_R_INVALID_MODIFIER)     ,"invalid modifier"},
 {ERR_REASON(ASN1_R_INVALID_NUMBER)       ,"invalid number"},
 {ERR_REASON(ASN1_R_INVALID_SEPARATOR)    ,"invalid separator"},
@@ -238,6 +246,9 @@ static ERR_STRING_DATA ASN1_str_reasons[]=
 {ERR_REASON(ASN1_R_IV_TOO_LARGE)         ,"iv too large"},
 {ERR_REASON(ASN1_R_LENGTH_ERROR)         ,"length error"},
 {ERR_REASON(ASN1_R_LIST_ERROR)           ,"list error"},
+{ERR_REASON(ASN1_R_MIME_NO_CONTENT_TYPE) ,"mime no content type"},
+{ERR_REASON(ASN1_R_MIME_PARSE_ERROR)     ,"mime parse error"},
+{ERR_REASON(ASN1_R_MIME_SIG_PARSE_ERROR) ,"mime sig parse error"},
 {ERR_REASON(ASN1_R_MISSING_EOC)          ,"missing eoc"},
 {ERR_REASON(ASN1_R_MISSING_SECOND_NUMBER),"missing second number"},
 {ERR_REASON(ASN1_R_MISSING_VALUE)        ,"missing value"},
@@ -247,7 +258,11 @@ static ERR_STRING_DATA ASN1_str_reasons[]=
 {ERR_REASON(ASN1_R_NON_HEX_CHARACTERS)   ,"non hex characters"},
 {ERR_REASON(ASN1_R_NOT_ASCII_FORMAT)     ,"not ascii format"},
 {ERR_REASON(ASN1_R_NOT_ENOUGH_DATA)      ,"not enough data"},
+{ERR_REASON(ASN1_R_NO_CONTENT_TYPE)      ,"no content type"},
 {ERR_REASON(ASN1_R_NO_MATCHING_CHOICE_TYPE),"no matching choice type"},
+{ERR_REASON(ASN1_R_NO_MULTIPART_BODY_FAILURE),"no multipart body failure"},
+{ERR_REASON(ASN1_R_NO_MULTIPART_BOUNDARY),"no multipart boundary"},
+{ERR_REASON(ASN1_R_NO_SIG_CONTENT_TYPE)  ,"no sig content type"},
 {ERR_REASON(ASN1_R_NULL_IS_WRONG_LENGTH) ,"null is wrong length"},
 {ERR_REASON(ASN1_R_OBJECT_NOT_ASCII_FORMAT),"object not ascii format"},
 {ERR_REASON(ASN1_R_ODD_NUMBER_OF_CHARS)  ,"odd number of chars"},
@@ -257,6 +272,8 @@ static ERR_STRING_DATA ASN1_str_reasons[]=
 {ERR_REASON(ASN1_R_SEQUENCE_NOT_CONSTRUCTED),"sequence not constructed"},
 {ERR_REASON(ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG),"sequence or set needs config"},
 {ERR_REASON(ASN1_R_SHORT_LINE)           ,"short line"},
+{ERR_REASON(ASN1_R_SIG_INVALID_MIME_TYPE),"sig invalid mime type"},
+{ERR_REASON(ASN1_R_STREAMING_NOT_SUPPORTED),"streaming not supported"},
 {ERR_REASON(ASN1_R_STRING_TOO_LONG)      ,"string too long"},
 {ERR_REASON(ASN1_R_STRING_TOO_SHORT)     ,"string too short"},
 {ERR_REASON(ASN1_R_TAG_VALUE_TOO_HIGH)   ,"tag value too high"},
diff --git a/crypto/asn1/asn_mime.c b/crypto/asn1/asn_mime.c
new file mode 100644
index 0000000000..41ef513c03
--- /dev/null
+++ b/crypto/asn1/asn_mime.c
@@ -0,0 +1,887 @@
+/* asn_mime.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project.
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2008 The OpenSSL Project.  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.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include "cryptlib.h"
+#include <openssl/rand.h>
+#include <openssl/x509.h>
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+
+/* Generalised MIME like utilities for streaming ASN1. Although many
+ * have a PKCS7/CMS like flavour others are more general purpose.
+ */
+
+/* MIME format structures
+ * Note that all are translated to lower case apart from
+ * parameter values. Quotes are stripped off
+ */
+
+typedef struct {
+char *param_name;			/* Param name e.g. "micalg" */
+char *param_value;			/* Param value e.g. "sha1" */
+} MIME_PARAM;
+
+DECLARE_STACK_OF(MIME_PARAM)
+IMPLEMENT_STACK_OF(MIME_PARAM)
+
+typedef struct {
+char *name;				/* Name of line e.g. "content-type" */
+char *value;				/* Value of line e.g. "text/plain" */
+STACK_OF(MIME_PARAM) *params;		/* Zero or more parameters */
+} MIME_HEADER;
+
+DECLARE_STACK_OF(MIME_HEADER)
+IMPLEMENT_STACK_OF(MIME_HEADER)
+
+static char * strip_ends(char *name);
+static char * strip_start(char *name);
+static char * strip_end(char *name);
+static MIME_HEADER *mime_hdr_new(char *name, char *value);
+static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value);
+static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio);
+static int mime_hdr_cmp(const MIME_HEADER * const *a,
+			const MIME_HEADER * const *b);
+static int mime_param_cmp(const MIME_PARAM * const *a,
+			const MIME_PARAM * const *b);
+static void mime_param_free(MIME_PARAM *param);
+static int mime_bound_check(char *line, int linelen, char *bound, int blen);
+static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret);
+static int strip_eol(char *linebuf, int *plen);
+static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name);
+static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name);
+static void mime_hdr_free(MIME_HEADER *hdr);
+
+#define MAX_SMLEN 1024
+#define mime_debug(x) /* x */
+
+/* Base 64 read and write of ASN1 structure */
+
+static int B64_write_ASN1(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
+				const ASN1_ITEM *it)
+	{
+	BIO *b64;
+	int r;
+	b64 = BIO_new(BIO_f_base64());
+	if(!b64)
+		{
+		ASN1err(ASN1_F_B64_WRITE_ASN1,ERR_R_MALLOC_FAILURE);
+		return 0;
+		}
+	/* prepend the b64 BIO so all data is base64 encoded.
+	 */
+	out = BIO_push(b64, out);
+	r = ASN1_item_i2d_bio(it, out, val);
+	(void)BIO_flush(out);
+	BIO_pop(out);
+	BIO_free(b64);
+	return r;
+	}
+
+/* Streaming ASN1 PEM write */
+
+int PEM_write_bio_ASN1_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
+				const char *hdr,
+				const ASN1_ITEM *it)
+	{
+	int r;
+	BIO_printf(out, "-----BEGIN %s-----\n", hdr);
+	r = B64_write_ASN1(out, val, in, flags, it);
+	BIO_printf(out, "-----END %s-----\n", hdr);
+	return r;
+	}
+
+static ASN1_VALUE *b64_read_asn1(BIO *bio, const ASN1_ITEM *it)
+{
+	BIO *b64;
+	ASN1_VALUE *val;
+	if(!(b64 = BIO_new(BIO_f_base64()))) {
+		ASN1err(ASN1_F_B64_READ_ASN1,ERR_R_MALLOC_FAILURE);
+		return 0;
+	}
+	bio = BIO_push(b64, bio);
+	val = ASN1_item_d2i_bio(it, bio, NULL);
+	if(!val)
+		ASN1err(ASN1_F_B64_READ_ASN1,ASN1_R_DECODE_ERROR);
+	(void)BIO_flush(bio);
+	bio = BIO_pop(bio);
+	BIO_free(b64);
+	return val;
+}
+
+/* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */
+
+static int asn1_write_micalg(BIO *out, STACK_OF(X509_ALGOR) *mdalgs)
+	{
+	const EVP_MD *md;
+	int i, have_unknown = 0, write_comma, md_nid;
+	have_unknown = 0;
+	write_comma = 0;
+	for (i = 0; i < sk_X509_ALGOR_num(mdalgs); i++)
+		{
+		if (write_comma)
+			BIO_write(out, ",", 1);
+		write_comma = 1;
+		md_nid = OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs, i)->algorithm);
+		md = EVP_get_digestbynid(md_nid);
+		switch(md_nid)
+			{
+			case NID_sha1:
+			BIO_puts(out, "sha1");
+			break;
+
+			case NID_md5:
+			BIO_puts(out, "md5");
+			break;
+
+			case NID_sha256:
+			BIO_puts(out, "sha-256");
+			break;
+
+			case NID_sha384:
+			BIO_puts(out, "sha-384");
+			break;
+
+			case NID_sha512:
+			BIO_puts(out, "sha-512");
+			break;
+
+			default:
+			if (have_unknown)
+				write_comma = 0;
+			else
+				{
+				BIO_puts(out, "unknown");
+				have_unknown = 1;
+				}
+			break;
+
+			}
+		}
+
+	return 1;
+
+	}
+
+/* SMIME sender */
+
+int int_smime_write_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags,
+				int ctype_nid, int econt_nid,
+				STACK_OF(X509_ALGOR) *mdalgs,
+				asn1_output_data_fn *data_fn,
+				const ASN1_ITEM *it)
+{
+	char bound[33], c;
+	int i;
+	const char *mime_prefix, *mime_eol, *cname = "smime.p7m";
+	const char *msg_type=NULL;
+	if (flags & SMIME_OLDMIME)
+		mime_prefix = "application/x-pkcs7-";
+	else
+		mime_prefix = "application/pkcs7-";
+
+	if (flags & SMIME_CRLFEOL)
+		mime_eol = "\r\n";
+	else
+		mime_eol = "\n";
+	if((flags & SMIME_DETACHED) && data) {
+	/* We want multipart/signed */
+		/* Generate a random boundary */
+		RAND_pseudo_bytes((unsigned char *)bound, 32);
+		for(i = 0; i < 32; i++) {
+			c = bound[i] & 0xf;
+			if(c < 10) c += '0';
+			else c += 'A' - 10;
+			bound[i] = c;
+		}
+		bound[32] = 0;
+		BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
+		BIO_printf(bio, "Content-Type: multipart/signed;");
+		BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix);
+		BIO_puts(bio, " micalg=\"");
+		asn1_write_micalg(bio, mdalgs);
+		BIO_printf(bio, "\"; boundary=\"----%s\"%s%s",
+						bound, mime_eol, mime_eol);
+		BIO_printf(bio, "This is an S/MIME signed message%s%s",
+						mime_eol, mime_eol);
+		/* Now write out the first part */
+		BIO_printf(bio, "------%s%s", bound, mime_eol);
+		if (!data_fn(bio, data, val, flags, it))
+			return 0;
+		BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol);
+
+		/* Headers for signature */
+
+		BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix); 
+		BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol);
+		BIO_printf(bio, "Content-Transfer-Encoding: base64%s",
+								mime_eol);
+		BIO_printf(bio, "Content-Disposition: attachment;");
+		BIO_printf(bio, " filename=\"smime.p7s\"%s%s",
+							mime_eol, mime_eol);
+		B64_write_ASN1(bio, val, NULL, 0, it);
+		BIO_printf(bio,"%s------%s--%s%s", mime_eol, bound,
+							mime_eol, mime_eol);
+		return 1;
+	}
+
+	/* Determine smime-type header */
+
+	if (ctype_nid == NID_pkcs7_enveloped)
+		msg_type = "enveloped-data";
+	else if (ctype_nid == NID_pkcs7_signed)
+		{
+		if (econt_nid == NID_id_smime_ct_receipt)
+			msg_type = "signed-receipt";
+		else if (sk_X509_ALGOR_num(mdalgs) >= 0)
+			msg_type = "signed-data";
+		else
+			msg_type = "certs-only";
+		}
+	else if (ctype_nid == NID_id_smime_ct_compressedData)
+		{
+		msg_type = "compressed-data";
+		cname = "smime.p7z";
+		}
+	/* MIME headers */
+	BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
+	BIO_printf(bio, "Content-Disposition: attachment;");
+	BIO_printf(bio, " filename=\"%s\"%s", cname, mime_eol);
+	BIO_printf(bio, "Content-Type: %smime;", mime_prefix);
+	if (msg_type)
+		BIO_printf(bio, " smime-type=%s;", msg_type);
+	BIO_printf(bio, " name=\"%s\"%s", cname, mime_eol);
+	BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
+						mime_eol, mime_eol);
+	if (!B64_write_ASN1(bio, val, data, flags, it))
+		return 0;
+	BIO_printf(bio, "%s", mime_eol);
+	return 1;
+}
+
+#if 0
+
+/* Handle output of ASN1 data */
+
+
+static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
+					const ASN1_ITEM *it)
+	{
+	BIO *tmpbio;
+	const ASN1_AUX *aux = it->funcs;
+	ASN1_STREAM_ARG sarg;
+
+	if (!(flags & SMIME_DETACHED))
+		{
+		SMIME_crlf_copy(data, out, flags);
+		return 1;
+		}
+
+	if (!aux || !aux->asn1_cb)
+		{
+		ASN1err(ASN1_F_ASN1_OUTPUT_DATA,
+					ASN1_R_STREAMING_NOT_SUPPORTED);
+		return 0;
+		}
+
+	sarg.out = out;
+	sarg.ndef_bio = NULL;
+	sarg.boundary = NULL;
+
+	/* Let ASN1 code prepend any needed BIOs */
+
+	if (aux->asn1_cb(ASN1_OP_DETACHED_PRE, &val, it, &sarg) <= 0)
+		return 0;
+
+	/* Copy data across, passing through filter BIOs for processing */
+	SMIME_crlf_copy(data, sarg.ndef_bio, flags);
+
+	/* Finalize structure */
+	if (aux->asn1_cb(ASN1_OP_DETACHED_POST, &val, it, &sarg) <= 0)
+		return 0;
+
+	/* Now remove any digests prepended to the BIO */
+
+	while (sarg.ndef_bio != out)
+		{
+		tmpbio = BIO_pop(sarg.ndef_bio);
+		BIO_free(sarg.ndef_bio);
+		sarg.ndef_bio = tmpbio;
+		}
+
+	return 1;
+
+	}
+
+#endif
+
+/* SMIME reader: handle multipart/signed and opaque signing.
+ * in multipart case the content is placed in a memory BIO
+ * pointed to by "bcont". In opaque this is set to NULL
+ */
+
+ASN1_VALUE *SMIME_read_ASN1(BIO *bio, BIO **bcont, const ASN1_ITEM *it)
+{
+	BIO *asnin;
+	STACK_OF(MIME_HEADER) *headers = NULL;
+	STACK_OF(BIO) *parts = NULL;
+	MIME_HEADER *hdr;
+	MIME_PARAM *prm;
+	ASN1_VALUE *val;
+	int ret;
+
+	if(bcont) *bcont = NULL;
+
+	if (!(headers = mime_parse_hdr(bio))) {
+		ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_MIME_PARSE_ERROR);
+		return NULL;
+	}
+
+	if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
+		sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+		ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_CONTENT_TYPE);
+		return NULL;
+	}
+
+	/* Handle multipart/signed */
+
+	if(!strcmp(hdr->value, "multipart/signed")) {
+		/* Split into two parts */
+		prm = mime_param_find(hdr, "boundary");
+		if(!prm || !prm->param_value) {
+			sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+			ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BOUNDARY);
+			return NULL;
+		}
+		ret = multi_split(bio, prm->param_value, &parts);
+		sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+		if(!ret || (sk_BIO_num(parts) != 2) ) {
+			ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BODY_FAILURE);
+			sk_BIO_pop_free(parts, BIO_vfree);
+			return NULL;
+		}
+
+		/* Parse the signature piece */
+		asnin = sk_BIO_value(parts, 1);
+
+		if (!(headers = mime_parse_hdr(asnin))) {
+			ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_MIME_SIG_PARSE_ERROR);
+			sk_BIO_pop_free(parts, BIO_vfree);
+			return NULL;
+		}
+
+		/* Get content type */
+
+		if(!(hdr = mime_hdr_find(headers, "content-type")) ||
+								 !hdr->value) {
+			sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+			ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_SIG_CONTENT_TYPE);
+			return NULL;
+		}
+
+		if(strcmp(hdr->value, "application/x-pkcs7-signature") &&
+			strcmp(hdr->value, "application/pkcs7-signature")) {
+			sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+			ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_SIG_INVALID_MIME_TYPE);
+			ERR_add_error_data(2, "type: ", hdr->value);
+			sk_BIO_pop_free(parts, BIO_vfree);
+			return NULL;
+		}
+		sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+		/* Read in ASN1 */
+		if(!(val = b64_read_asn1(asnin, it))) {
+			ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_ASN1_SIG_PARSE_ERROR);
+			sk_BIO_pop_free(parts, BIO_vfree);
+			return NULL;
+		}
+
+		if(bcont) {
+			*bcont = sk_BIO_value(parts, 0);
+			BIO_free(asnin);
+			sk_BIO_free(parts);
+		} else sk_BIO_pop_free(parts, BIO_vfree);
+		return val;
+	}
+		
+	/* OK, if not multipart/signed try opaque signature */
+
+	if (strcmp (hdr->value, "application/x-pkcs7-mime") &&
+	    strcmp (hdr->value, "application/pkcs7-mime")) {
+		ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_INVALID_MIME_TYPE);
+		ERR_add_error_data(2, "type: ", hdr->value);
+		sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+		return NULL;
+	}
+
+	sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+	
+	if(!(val = b64_read_asn1(bio, it))) {
+		ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_ASN1_PARSE_ERROR);
+		return NULL;
+	}
+	return val;
+
+}
+
+/* Copy text from one BIO to another making the output CRLF at EOL */
+int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
+{
+	BIO *bf;
+	char eol;
+	int len;
+	char linebuf[MAX_SMLEN];
+	/* Buffer output so we don't write one line at a time. This is
+	 * useful when streaming as we don't end up with one OCTET STRING
+	 * per line.
+	 */
+	bf = BIO_new(BIO_f_buffer());
+	if (!bf)
+		return 0;
+	out = BIO_push(bf, out);
+	if(flags & SMIME_BINARY)
+		{
+		while((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0)
+						BIO_write(out, linebuf, len);
+		}
+	else
+		{
+		if(flags & SMIME_TEXT)
+			BIO_printf(out, "Content-Type: text/plain\r\n\r\n");
+		while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0)
+			{
+			eol = strip_eol(linebuf, &len);
+			if (len)
+				BIO_write(out, linebuf, len);
+			if(eol) BIO_write(out, "\r\n", 2);
+			}
+		}
+	(void)BIO_flush(out);
+	BIO_pop(out);
+	BIO_free(bf);
+	return 1;
+}
+
+/* Strip off headers if they are text/plain */
+int SMIME_text(BIO *in, BIO *out)
+{
+	char iobuf[4096];
+	int len;
+	STACK_OF(MIME_HEADER) *headers;
+	MIME_HEADER *hdr;
+
+	if (!(headers = mime_parse_hdr(in))) {
+		ASN1err(ASN1_F_SMIME_TEXT,ASN1_R_MIME_PARSE_ERROR);
+		return 0;
+	}
+	if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
+		ASN1err(ASN1_F_SMIME_TEXT,ASN1_R_MIME_NO_CONTENT_TYPE);
+		sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+		return 0;
+	}
+	if (strcmp (hdr->value, "text/plain")) {
+		ASN1err(ASN1_F_SMIME_TEXT,ASN1_R_INVALID_MIME_TYPE);
+		ERR_add_error_data(2, "type: ", hdr->value);
+		sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+		return 0;
+	}
+	sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
+	while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0)
+						BIO_write(out, iobuf, len);
+	return 1;
+}
+
+/* Split a multipart/XXX message body into component parts: result is
+ * canonical parts in a STACK of bios
+ */
+
+static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret)
+{
+	char linebuf[MAX_SMLEN];
+	int len, blen;
+	int eol = 0, next_eol = 0;
+	BIO *bpart = NULL;
+	STACK_OF(BIO) *parts;
+	char state, part, first;
+
+	blen = strlen(bound);
+	part = 0;
+	state = 0;
+	first = 1;
+	parts = sk_BIO_new_null();
+	*ret = parts;
+	while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
+		state = mime_bound_check(linebuf, len, bound, blen);
+		if(state == 1) {
+			first = 1;
+			part++;
+		} else if(state == 2) {
+			sk_BIO_push(parts, bpart);
+			return 1;
+		} else if(part) {
+			/* Strip CR+LF from linebuf */
+			next_eol = strip_eol(linebuf, &len);
+			if(first) {
+				first = 0;
+				if(bpart) sk_BIO_push(parts, bpart);
+				bpart = BIO_new(BIO_s_mem());
+				BIO_set_mem_eof_return(bpart, 0);