From: Dr. Stephen Henson <steve@openssl.org>
Date: Sun, 9 Aug 2009 14:49:00 +0000 (+0000)
Subject: Backport modified version of MIME wrapper for PKCS#7. This ensures
X-Git-Tag: OpenSSL_0_9_8m-beta1~151
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=5fffb5b3d9024d7d5f90a3f7b1b7138ed79b328f;p=oweals%2Fopenssl.git

Backport modified version of MIME wrapper for PKCS#7. This ensures
correct values for micalg among other things.
---

diff --git a/crypto/pkcs7/pk7_mime.c b/crypto/pkcs7/pk7_mime.c
index bf190360d7..7762d647ca 100644
--- a/crypto/pkcs7/pk7_mime.c
+++ b/crypto/pkcs7/pk7_mime.c
@@ -50,10 +50,6 @@
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  * ====================================================================
  *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
  */
 
 #include <stdio.h>
@@ -61,200 +57,47 @@
 #include "cryptlib.h"
 #include <openssl/rand.h>
 #include <openssl/x509.h>
+#include <openssl/asn1.h>
 
-/* MIME and related routines */
-
-/* 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 int pkcs7_output_data(BIO *bio, BIO *data, PKCS7 *p7, int flags);
-static int B64_write_PKCS7(BIO *bio, PKCS7 *p7);
-static PKCS7 *B64_read_PKCS7(BIO *bio);
-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);
+/* PKCS#7 wrappers round generalised MIME routines */
 
-#define MAX_SMLEN 1024
-#define mime_debug(x) /* x */
-
-/* Base 64 read and write of PKCS#7 structure */
-
-static int B64_write_PKCS7(BIO *bio, PKCS7 *p7)
-{
-	BIO *b64;
-	if(!(b64 = BIO_new(BIO_f_base64()))) {
-		PKCS7err(PKCS7_F_B64_WRITE_PKCS7,ERR_R_MALLOC_FAILURE);
-		return 0;
-	}
-	bio = BIO_push(b64, bio);
-	i2d_PKCS7_bio(bio, p7);
-	(void)BIO_flush(bio);
-	bio = BIO_pop(bio);
-	BIO_free(b64);
-	return 1;
-}
-
-static PKCS7 *B64_read_PKCS7(BIO *bio)
-{
-	BIO *b64;
-	PKCS7 *p7;
-	if(!(b64 = BIO_new(BIO_f_base64()))) {
-		PKCS7err(PKCS7_F_B64_READ_PKCS7,ERR_R_MALLOC_FAILURE);
-		return 0;
-	}
-	bio = BIO_push(b64, bio);
-	if(!(p7 = d2i_PKCS7_bio(bio, NULL))) 
-		PKCS7err(PKCS7_F_B64_READ_PKCS7,PKCS7_R_DECODE_ERROR);
-	(void)BIO_flush(bio);
-	bio = BIO_pop(bio);
-	BIO_free(b64);
-	return p7;
-}
-
-/* SMIME sender */
-
-int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
-{
-	char bound[33], c;
-	int i;
-	char *mime_prefix, *mime_eol, *msg_type=NULL;
-	if (flags & PKCS7_NOOLDMIMETYPE)
-		mime_prefix = "application/pkcs7-";
-	else
-		mime_prefix = "application/x-pkcs7-";
-
-	if (flags & PKCS7_CRLFEOL)
-		mime_eol = "\r\n";
-	else
-		mime_eol = "\n";
-	if((flags & PKCS7_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_printf(bio, " micalg=sha1; 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);
-		pkcs7_output_data(bio, data, p7, flags);
-		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_PKCS7(bio, p7);
-		BIO_printf(bio,"%s------%s--%s%s", mime_eol, bound,
-							mime_eol, mime_eol);
-		return 1;
+PKCS7 *SMIME_read_PKCS7(BIO *bio, BIO **bcont)
+	{
+	return (PKCS7 *)SMIME_read_ASN1(bio, bcont, ASN1_ITEM_rptr(PKCS7));
 	}
 
-	/* Determine smime-type header */
-
-	if (PKCS7_type_is_enveloped(p7))
-		msg_type = "enveloped-data";
-	else if (PKCS7_type_is_signed(p7))
-		{
-		/* If we have any signers it is signed-data othewise 
-		 * certs-only.
-		 */
-		STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
-		sinfos = PKCS7_get_signer_info(p7);
-		if (sk_PKCS7_SIGNER_INFO_num(sinfos) > 0)
-			msg_type = "signed-data";
-		else
-			msg_type = "certs-only";
-		}
-	/* MIME headers */
-	BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
-	BIO_printf(bio, "Content-Disposition: attachment;");
-	BIO_printf(bio, " filename=\"smime.p7m\"%s", 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=\"smime.p7m\"%s", mime_eol);
-	BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
-						mime_eol, mime_eol);
-	B64_write_PKCS7(bio, p7);
-	BIO_printf(bio, "%s", mime_eol);
-	return 1;
-}
-
-/* Handle output of PKCS#7 data */
+/* Callback for int_smime_write_ASN1 */
 
-
-static int pkcs7_output_data(BIO *out, BIO *data, PKCS7 *p7, int flags)
+static int pk7_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
+					const ASN1_ITEM *it)
 	{
+	PKCS7 *p7 = (PKCS7 *)val;
 	BIO *tmpbio, *p7bio;
+	int r = 0;
 
-	if (!(flags & PKCS7_STREAM))
+	if (!(flags & SMIME_DETACHED))
 		{
 		SMIME_crlf_copy(data, out, flags);
 		return 1;
 		}
 
-	/* Partial sign operation */
+	/* Let PKCS7 code prepend any needed BIOs */
 
-	/* Initialize sign operation */
 	p7bio = PKCS7_dataInit(p7, out);
 
-	/* Copy data across, computing digests etc */
+	if (!p7bio)
+		return 0;
+
+	/* Copy data across, passing through filter BIOs for processing */
 	SMIME_crlf_copy(data, p7bio, flags);
 
-	/* Must be detached */
-	PKCS7_set_detached(p7, 1);
+	/* Finalize structure */
+	if (PKCS7_dataFinal(p7, p7bio) <= 0)
+		goto err;
+
+	r = 1;
 
-	/* Finalize signatures */
-	PKCS7_dataFinal(p7, p7bio);
+	err:
 
 	/* Now remove any digests prepended to the BIO */
 
@@ -269,454 +112,17 @@ static int pkcs7_output_data(BIO *out, BIO *data, PKCS7 *p7, int flags)
 
 	}
 
-/* 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
- */
-
-PKCS7 *SMIME_read_PKCS7(BIO *bio, BIO **bcont)
-{
-	BIO *p7in;
-	STACK_OF(MIME_HEADER) *headers = NULL;
-	STACK_OF(BIO) *parts = NULL;
-	MIME_HEADER *hdr;
-	MIME_PARAM *prm;
-	PKCS7 *p7;
-	int ret;
-
-	if(bcont) *bcont = NULL;
-
-	if (!(headers = mime_parse_hdr(bio))) {
-		PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_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);
-		PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_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);
-			PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_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) ) {
-			PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_MULTIPART_BODY_FAILURE);
-			sk_BIO_pop_free(parts, BIO_vfree);
-			return NULL;
-		}
-
-		/* Parse the signature piece */
-		p7in = sk_BIO_value(parts, 1);
-
-		if (!(headers = mime_parse_hdr(p7in))) {
-			PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_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);
-			PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_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);
-			PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_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 PKCS#7 */
-		if(!(p7 = B64_read_PKCS7(p7in))) {
-			PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_PKCS7_SIG_PARSE_ERROR);
-			sk_BIO_pop_free(parts, BIO_vfree);
-			return NULL;
-		}
-
-		if(bcont) {
-			*bcont = sk_BIO_value(parts, 0);
-			BIO_free(p7in);
-			sk_BIO_free(parts);
-		} else sk_BIO_pop_free(parts, BIO_vfree);
-		return p7;
-	}
-		
-	/* OK, if not multipart/signed try opaque signature */
-
-	if (strcmp (hdr->value, "application/x-pkcs7-mime") &&
-	    strcmp (hdr->value, "application/pkcs7-mime")) {
-		PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_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(!(p7 = B64_read_PKCS7(bio))) {
-		PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_PKCS7_PARSE_ERROR);
-		return NULL;
-	}
-	return p7;
-
-}
-
-/* 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);
-			} else if (eol)
-				BIO_write(bpart, "\r\n", 2);
-			eol = next_eol;
-			if (len)
-				BIO_write(bpart, linebuf, len);
-		}
-	}
-	return 0;
-}
-
-/* This is the big one: parse MIME header lines up to message body */
-
-#define MIME_INVALID	0
-#define MIME_START	1
-#define MIME_TYPE	2
-#define MIME_NAME	3
-#define MIME_VALUE	4
-#define MIME_QUOTE	5
-#define MIME_COMMENT	6
-
-
-static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio)
-{
-	char *p, *q, c;
-	char *ntmp;
-	char linebuf[MAX_SMLEN];
-	MIME_HEADER *mhdr = NULL;
-	STACK_OF(MIME_HEADER) *headers;
-	int len, state, save_state = 0;
-
-	headers = sk_MIME_HEADER_new(mime_hdr_cmp);
-	while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
-	/* If whitespace at line start then continuation line */
-	if(mhdr && isspace((unsigned char)linebuf[0])) state = MIME_NAME;
-	else state = MIME_START;
-	ntmp = NULL;
-	/* Go through all characters */
-	for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
-
-	/* State machine to handle MIME headers
-	 * if this looks horrible that's because it *is*
-         */
-
-		switch(state) {
-			case MIME_START:
-			if(c == ':') {
-				state = MIME_TYPE;
-				*p = 0;
-				ntmp = strip_ends(q);
-				q = p + 1;
-			}
-			break;
-
-			case MIME_TYPE:
-			if(c == ';') {
-				mime_debug("Found End Value\n");
-				*p = 0;
-				mhdr = mime_hdr_new(ntmp, strip_ends(q));
-				sk_MIME_HEADER_push(headers, mhdr);
-				ntmp = NULL;
-				q = p + 1;
-				state = MIME_NAME;
-			} else if(c == '(') {
-				save_state = state;
-				state = MIME_COMMENT;
-			}
-			break;
-
-			case MIME_COMMENT:
-			if(c == ')') {
-				state = save_state;
-			}
-			break;
-
-			case MIME_NAME:
-			if(c == '=') {
-				state = MIME_VALUE;
-				*p = 0;
-				ntmp = strip_ends(q);
-				q = p + 1;
-			}
-			break ;
-
-			case MIME_VALUE:
-			if(c == ';') {
-				state = MIME_NAME;
-				*p = 0;
-				mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
-				ntmp = NULL;
-				q = p + 1;
-			} else if (c == '"') {
-				mime_debug("Found Quote\n");
-				state = MIME_QUOTE;
-			} else if(c == '(') {
-				save_state = state;
-				state = MIME_COMMENT;
-			}
-			break;
-
-			case MIME_QUOTE:
-			if(c == '"') {
-				mime_debug("Found Match Quote\n");
-				state = MIME_VALUE;
-			}
-			break;
-		}
-	}
-
-	if(state == MIME_TYPE) {
-		mhdr = mime_hdr_new(ntmp, strip_ends(q));
-		sk_MIME_HEADER_push(headers, mhdr);
-	} else if(state == MIME_VALUE)
-			 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
-	if(p == linebuf) break;	/* Blank line means end of headers */
-}
-
-return headers;
-
-}
-
-static char *strip_ends(char *name)
-{
-	return strip_end(strip_start(name));
-}
-
-/* Strip a parameter of whitespace from start of param */
-static char *strip_start(char *name)
-{
-	char *p, c;
-	/* Look for first non white space or quote */
-	for(p = name; (c = *p) ;p++) {
-		if(c == '"') {
-			/* Next char is start of string if non null */
-			if(p[1]) return p + 1;
-			/* Else null string */
-			return NULL;
-		}
-		if(!isspace((unsigned char)c)) return p;
-	}
-	return NULL;
-}
-
-/* As above but strip from end of string : maybe should handle brackets? */
-static char *strip_end(char *name)
-{
-	char *p, c;
-	if(!name) return NULL;
-	/* Look for first non white space or quote */
-	for(p = name + strlen(name) - 1; p >= name ;p--) {
-		c = *p;
-		if(c == '"') {
-			if(p - 1 == name) return NULL;
-			*p = 0;
-			return name;
-		}
-		if(isspace((unsigned char)c)) *p = 0;	
-		else return name;
-	}
-	return NULL;
-}
-
-static MIME_HEADER *mime_hdr_new(char *name, char *value)
-{
-	MIME_HEADER *mhdr;
-	char *tmpname, *tmpval, *p;
-	int c;
-	if(name) {
-		if(!(tmpname = BUF_strdup(name))) return NULL;
-		for(p = tmpname ; *p; p++) {
-			c = *p;
-			if(isupper(c)) {
-				c = tolower(c);
-				*p = c;
-			}
-		}
-	} else tmpname = NULL;
-	if(value) {
-		if(!(tmpval = BUF_strdup(value))) return NULL;
-		for(p = tmpval ; *p; p++) {
-			c = *p;
-			if(isupper(c)) {
-				c = tolower(c);
-				*p = c;
-			}
-		}
-	} else tmpval = NULL;
-	mhdr = (MIME_HEADER *) OPENSSL_malloc(sizeof(MIME_HEADER));
-	if(!mhdr) return NULL;
-	mhdr->name = tmpname;
-	mhdr->value = tmpval;
-	if(!(mhdr->params = sk_MIME_PARAM_new(mime_param_cmp))) return NULL;
-	return mhdr;
-}
-		
-static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
-{
-	char *tmpname, *tmpval, *p;
-	int c;
-	MIME_PARAM *mparam;
-	if(name) {
-		tmpname = BUF_strdup(name);
-		if(!tmpname) return 0;
-		for(p = tmpname ; *p; p++) {
-			c = *p;
-			if(isupper(c)) {
-				c = tolower(c);
-				*p = c;
-			}
-		}
-	} else tmpname = NULL;
-	if(value) {
-		tmpval = BUF_strdup(value);
-		if(!tmpval) return 0;
-	} else tmpval = NULL;
-	/* Parameter values are case sensitive so leave as is */
-	mparam = (MIME_PARAM *) OPENSSL_malloc(sizeof(MIME_PARAM));
-	if(!mparam) return 0;
-	mparam->param_name = tmpname;
-	mparam->param_value = tmpval;
-	sk_MIME_PARAM_push(mhdr->params, mparam);
-	return 1;
-}
-
-static int mime_hdr_cmp(const MIME_HEADER * const *a,
-			const MIME_HEADER * const *b)
-{
-	return(strcmp((*a)->name, (*b)->name));
-}
-
-static int mime_param_cmp(const MIME_PARAM * const *a,
-			const MIME_PARAM * const *b)
-{
-	return(strcmp((*a)->param_name, (*b)->param_name));
-}
-
-/* Find a header with a given name (if possible) */
-
-static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name)
-{
-	MIME_HEADER htmp;
-	int idx;
-	htmp.name = name;
-	idx = sk_MIME_HEADER_find(hdrs, &htmp);
-	if(idx < 0) return NULL;
-	return sk_MIME_HEADER_value(hdrs, idx);
-}
-
-static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name)
-{
-	MIME_PARAM param;
-	int idx;
-	param.param_name = name;
-	idx = sk_MIME_PARAM_find(hdr->params, &param);
-	if(idx < 0) return NULL;
-	return sk_MIME_PARAM_value(hdr->params, idx);
-}
-
-static void mime_hdr_free(MIME_HEADER *hdr)
-{
-	if(hdr->name) OPENSSL_free(hdr->name);
-	if(hdr->value) OPENSSL_free(hdr->value);
-	if(hdr->params) sk_MIME_PARAM_pop_free(hdr->params, mime_param_free);
-	OPENSSL_free(hdr);
-}
-
-static void mime_param_free(MIME_PARAM *param)
-{
-	if(param->param_name) OPENSSL_free(param->param_name);
-	if(param->param_value) OPENSSL_free(param->param_value);
-	OPENSSL_free(param);
-}
-
-/* Check for a multipart boundary. Returns:
- * 0 : no boundary
- * 1 : part boundary
- * 2 : final boundary
- */
-static int mime_bound_check(char *line, int linelen, char *bound, int blen)
-{
-	if(linelen == -1) linelen = strlen(line);
-	if(blen == -1) blen = strlen(bound);
-	/* Quickly eliminate if line length too short */
-	if(blen + 2 > linelen) return 0;
-	/* Check for part boundary */
-	if(!strncmp(line, "--", 2) && !strncmp(line + 2, bound, blen)) {
-		if(!strncmp(line + blen + 2, "--", 2)) return 2;
-		else return 1;
-	}
-	return 0;
-}
-
-static int strip_eol(char *linebuf, int *plen)
+int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
 	{
-	int len = *plen;
-	char *p, c;
-	int is_eol = 0;
-	p = linebuf + len - 1;
-	for (p = linebuf + len - 1; len > 0; len--, p--)
-		{
-		c = *p;
-		if (c == '\n')
-			is_eol = 1;
-		else if (c != '\r')
-			break;
-		}
-	*plen = len;
-	return is_eol;
+	STACK_OF(X509_ALGOR) *mdalgs;
+	int ctype_nid = OBJ_obj2nid(p7->type);
+	if (ctype_nid == NID_pkcs7_signed)
+		mdalgs = p7->d.sign->md_algs;
+	else
+		mdalgs = NULL;
+
+	return int_smime_write_ASN1(bio, (ASN1_VALUE *)p7, data, flags,
+					ctype_nid, NID_undef, mdalgs,
+					pk7_output_data,
+					ASN1_ITEM_rptr(PKCS7));	
 	}