diff options
author | Dr. Stephen Henson <steve@openssl.org> | 2008-03-12 21:14:28 +0000 |
---|---|---|
committer | Dr. Stephen Henson <steve@openssl.org> | 2008-03-12 21:14:28 +0000 |
commit | 8931b30d8478b0bd24af251fac64e7b0bf121369 (patch) | |
tree | 04d17028c745633b40b997699bc580c7b4cc600d /crypto/pkcs7 | |
parent | 27dc105f51361fc71f556e927f621218883b0c26 (diff) |
And so it begins...
Initial support for CMS.
Add zlib compression BIO.
Add AES key wrap implementation.
Generalize S/MIME MIME code to support CMS and/or PKCS7.
Diffstat (limited to 'crypto/pkcs7')
-rw-r--r-- | crypto/pkcs7/bio_pk7.c | 168 | ||||
-rw-r--r-- | crypto/pkcs7/pk7_asn1.c | 36 | ||||
-rw-r--r-- | crypto/pkcs7/pk7_attr.c | 4 | ||||
-rw-r--r-- | crypto/pkcs7/pk7_mime.c | 859 | ||||
-rw-r--r-- | crypto/pkcs7/pkcs7.h | 1 |
5 files changed, 56 insertions, 1012 deletions
diff --git a/crypto/pkcs7/bio_pk7.c b/crypto/pkcs7/bio_pk7.c index d4a68c039c..c8d06d6cdc 100644 --- a/crypto/pkcs7/bio_pk7.c +++ b/crypto/pkcs7/bio_pk7.c @@ -1,9 +1,9 @@ /* bio_pk7.c */ -/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL +/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL * project. */ /* ==================================================================== - * Copyright (c) 2006 The OpenSSL Project. All rights reserved. + * Copyright (c) 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 @@ -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 <openssl/asn1.h> @@ -65,165 +61,9 @@ #endif #include <stdio.h> -/* Highly experiemental PKCS#7 BIO support routines */ - -/* The usage is quite simple, initialize a PKCS7 structure, - * get a BIO from it then any data written through the BIO - * will end up translated to PKCS#7 format on the fly. - * The data is streamed out and does *not* need to be - * all held in memory at once. - * - * When the BIO is flushed the output is finalized and any - * signatures etc written out. - * - * The BIO is a 'proper' BIO and can handle non blocking I/O - * correctly. - * - * The usage is simple. The implementation is *not*... - */ - -/* BIO support data stored in the ASN1 BIO ex_arg */ - -typedef struct pkcs7_aux_st - { - /* PKCS7 structure this BIO refers to */ - PKCS7 *p7; - /* Top of the BIO chain */ - BIO *p7bio; - /* Output BIO */ - BIO *out; - /* Boundary where content is inserted */ - unsigned char **boundary; - /* DER buffer start */ - unsigned char *derbuf; - } PKCS7_SUPPORT; - -static int pkcs7_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg); -static int pkcs7_prefix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg); -static int pkcs7_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg); -static int pkcs7_suffix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg); +/* Streaming encode support for PKCS#7 */ BIO *BIO_new_PKCS7(BIO *out, PKCS7 *p7) { - PKCS7_SUPPORT *p7aux = NULL; - BIO *p7bio = NULL; - BIO *asn_bio = NULL; - unsigned char **boundary; - p7aux = OPENSSL_malloc(sizeof(PKCS7_SUPPORT)); - asn_bio = BIO_new(BIO_f_asn1()); - - /* ASN1 bio needs to be next to output BIO */ - - out = BIO_push(asn_bio, out); - - if (!p7aux || !asn_bio || !out) - goto err; - - BIO_asn1_set_prefix(asn_bio, pkcs7_prefix, pkcs7_prefix_free); - BIO_asn1_set_suffix(asn_bio, pkcs7_suffix, pkcs7_suffix_free); - - /* Now initialize BIO for PKCS#7 output */ - - p7bio = PKCS7_dataInit(p7, out); - if (!p7bio || !PKCS7_stream(&boundary, p7)) - goto err; - - p7aux->p7 = p7; - p7aux->p7bio = p7bio; - p7aux->boundary = boundary; - p7aux->out = out; - - BIO_ctrl(asn_bio, BIO_C_SET_EX_ARG, 0, p7aux); - - return p7bio; - - err: - if (p7bio) - BIO_free(p7bio); - if (asn_bio) - BIO_free(asn_bio); - if (p7aux) - OPENSSL_free(p7aux); - return NULL; - } - -static int pkcs7_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg) - { - PKCS7_SUPPORT *p7aux; - unsigned char *p; - int derlen; - - if (!parg) - return 0; - - p7aux = *(PKCS7_SUPPORT **)parg; - - derlen = i2d_PKCS7_NDEF(p7aux->p7, NULL); - p = OPENSSL_malloc(derlen); - p7aux->derbuf = p; - *pbuf = p; - i2d_PKCS7_NDEF(p7aux->p7, &p); - - if (!*p7aux->boundary) - return 0; - - *plen = *p7aux->boundary - *pbuf; - - return 1; - } - -static int pkcs7_prefix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg) - { - PKCS7_SUPPORT *p7aux; - - if (!parg) - return 0; - - p7aux = *(PKCS7_SUPPORT **)parg; - - if (p7aux->derbuf) - OPENSSL_free(p7aux->derbuf); - - p7aux->derbuf = NULL; - *pbuf = NULL; - *plen = 0; - return 1; - } - -static int pkcs7_suffix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg) - { - PKCS7_SUPPORT **pp7aux = (PKCS7_SUPPORT **)parg; - if (!pkcs7_prefix_free(b, pbuf, plen, parg)) - return 0; - OPENSSL_free(*pp7aux); - *pp7aux = NULL; - return 1; - } - -static int pkcs7_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg) - { - PKCS7_SUPPORT *p7aux; - unsigned char *p; - int derlen; - - if (!parg) - return 0; - - p7aux = *(PKCS7_SUPPORT **)parg; - - /* Finalize structures */ - PKCS7_dataFinal(p7aux->p7, p7aux->p7bio); - - derlen = i2d_PKCS7_NDEF(p7aux->p7, NULL); - p = OPENSSL_malloc(derlen); - p7aux->derbuf = p; - i2d_PKCS7_NDEF(p7aux->p7, &p); - if (!*p7aux->boundary) - return 0; - *pbuf = *p7aux->boundary; - *plen = derlen - (*p7aux->boundary - p7aux->derbuf); - - return 1; + return BIO_new_NDEF(out, (ASN1_VALUE *)p7, ASN1_ITEM_rptr(PKCS7)); } - - diff --git a/crypto/pkcs7/pk7_asn1.c b/crypto/pkcs7/pk7_asn1.c index fdc8ddecb4..339f89365b 100644 --- a/crypto/pkcs7/pk7_asn1.c +++ b/crypto/pkcs7/pk7_asn1.c @@ -77,10 +77,42 @@ ASN1_ADB(PKCS7) = { ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0)) } ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL); -ASN1_NDEF_SEQUENCE(PKCS7) = { +/* PKCS#7 streaming support */ +static int pk7_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, + void *exarg) +{ + ASN1_STREAM_ARG *sarg = exarg; + PKCS7 *p7; + if (pval) + p7 = (PKCS7 *)*pval; + else + p7 = NULL; + switch(operation) + { + + case ASN1_OP_STREAM_PRE: + if (PKCS7_stream(&sarg->boundary, p7) <= 0) + return 0; + case ASN1_OP_DETACHED_PRE: + sarg->ndef_bio = PKCS7_dataInit(p7, sarg->out); + if (!sarg->ndef_bio) + return 0; + break; + + case ASN1_OP_STREAM_POST: + case ASN1_OP_DETACHED_POST: + if (PKCS7_dataFinal(p7, sarg->ndef_bio) <= 0) + return 0; + break; + + } + return 1; +} + +ASN1_NDEF_SEQUENCE_cb(PKCS7, pk7_cb) = { ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT), ASN1_ADB_OBJECT(PKCS7) -}ASN1_NDEF_SEQUENCE_END(PKCS7) +}ASN1_NDEF_SEQUENCE_END_cb(PKCS7, PKCS7) IMPLEMENT_ASN1_FUNCTIONS(PKCS7) IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7) diff --git a/crypto/pkcs7/pk7_attr.c b/crypto/pkcs7/pk7_attr.c index f08d848709..dec744df4f 100644 --- a/crypto/pkcs7/pk7_attr.c +++ b/crypto/pkcs7/pk7_attr.c @@ -66,10 +66,6 @@ #include <openssl/x509.h> #include <openssl/err.h> -ASN1_ITEM_TEMPLATE(X509_ALGORS) = - ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, algorithms, X509_ALGOR) -ASN1_ITEM_TEMPLATE_END(X509_ALGORS) - int PKCS7_add_attrib_smimecap(PKCS7_SIGNER_INFO *si, STACK_OF(X509_ALGOR) *cap) { ASN1_STRING *seq; diff --git a/crypto/pkcs7/pk7_mime.c b/crypto/pkcs7/pk7_mime.c index de710c3d68..f44ca697db 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> @@ -61,862 +57,41 @@ #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, BIO *in, int flags); -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); - -#define MAX_SMLEN 1024 -#define mime_debug(x) /* x */ - -/* Output a PKCS#7 structure in BER format streaming if necessary */ +/* PKCS#7 wrappers round generalised stream and MIME routines */ int i2d_PKCS7_bio_stream(BIO *out, PKCS7 *p7, BIO *in, int flags) { - /* If streaming create stream BIO and copy all content through it */ - if (flags & PKCS7_STREAM) - { - BIO *bio, *tbio; - bio = BIO_new_PKCS7(out, p7); - if (!bio) - { - PKCS7err(PKCS7_F_I2D_PKCS7_BIO_STREAM,ERR_R_MALLOC_FAILURE); - return 0; - } - SMIME_crlf_copy(in, bio, flags); - (void)BIO_flush(bio); - /* Free up successive BIOs until we hit the old output BIO */ - do - { - tbio = BIO_pop(bio); - BIO_free(bio); - bio = tbio; - } while (bio != out); - } - /* else just write out PKCS7 structure which will have all content - * stored internally - */ - else - i2d_PKCS7_bio(out, p7); - return 1; - } - -/* Base 64 read and write of PKCS#7 structure */ - -static int B64_write_PKCS7(BIO *out, PKCS7 *p7, BIO *in, int flags) - { - BIO *b64; - int r; - b64 = BIO_new(BIO_f_base64()); - if(!b64) - { - PKCS7err(PKCS7_F_B64_WRITE_PKCS7,ERR_R_MALLOC_FAILURE); - return 0; - } - /* prepend the b64 BIO so all data is base64 encoded. - */ - out = BIO_push(b64, out); - r = i2d_PKCS7_bio_stream(out, p7, in, flags); - (void)BIO_flush(out); - BIO_pop(out); - BIO_free(b64); - return r; + return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)p7, in, flags, + ASN1_ITEM_rptr(PKCS7)); } -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; -} - -/* Streaming PKCS#7 PEM write */ - int PEM_write_bio_PKCS7_stream(BIO *out, PKCS7 *p7, BIO *in, int flags) { - int r; - BIO_puts(out, "-----BEGIN PKCS7-----\n"); - r = B64_write_PKCS7(out, p7, in, flags); - BIO_puts(out, "-----END PKCS7-----\n"); - return r; + return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *) p7, in, flags, + "PKCS7", + ASN1_ITEM_rptr(PKCS7)); } -/* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */ - -static int pk7_write_micalg(BIO *out, PKCS7 *p7) +int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags) { STACK_OF(X509_ALGOR) *mdalgs; - const EVP_MD *md; - int i, have_unknown = 0, write_comma, ret = 0, md_nid; - mdalgs = p7->d.sign->md_algs; - 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); - if (md && md->md_ctrl) - { - int rv; - char *micstr; - rv = md->md_ctrl(NULL, EVP_MD_CTRL_MICALG, 0, &micstr); - if (rv > 0) - { - BIO_puts(out, micstr); - OPENSSL_free(micstr); - continue; - } - if (rv != -2) - goto err; - } - 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; - - case NID_id_GostR3411_94: - BIO_puts(out, "gostr3411-94"); - goto err; - break; - - default: - if (have_unknown) - write_comma = 0; - else - { - BIO_puts(out, "unknown"); - have_unknown = 1; - } - break; - - } - } - - ret = 1; - err: - - return ret; - - } - - - - -/* 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"; + int ctype_nid = OBJ_obj2nid(p7->type); + if (ctype_nid == NID_pkcs7_signed) + mdalgs = p7->d.sign->md_algs; 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_puts(bio, " micalg=\""); - pk7_write_micalg(bio, p7); - 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); - 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, NULL, 0); - BIO_printf(bio,"%s------%s--%s%s", mime_eol, bound, - mime_eol, mime_eol); - return 1; - } - - /* 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 otherwise - * 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"; - } - else - flags &= ~PKCS7_STREAM; - /* 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, data, flags); - BIO_printf(bio, "%s", mime_eol); - return 1; -} - -/* Handle output of PKCS#7 data */ + mdalgs = NULL; + flags ^= SMIME_OLDMIME; -static int pkcs7_output_data(BIO *out, BIO *data, PKCS7 *p7, int flags) - { - BIO *tmpbio, *p7bio; - - if (!(flags & PKCS7_STREAM)) - { - SMIME_crlf_copy(data, out, flags); - return 1; - } - - /* Partial sign operation */ - - /* Initialize sign operation */ - p7bio = PKCS7_dataInit(p7, out); - - /* Copy data across, computing digests etc */ - SMIME_crlf_copy(data, p7bio, flags); - - /* Must be detached */ - PKCS7_set_detached(p7, 1); - - /* Finalize signatures */ - PKCS7_dataFinal(p7, p7bio); - - /* Now remove any digests prepended to the BIO */ - - while (p7bio != out) - { - tmpbio = BIO_pop(p7bio); - BIO_free(p7bio); - p7bio = tmpbio; - } - - return 1; + return SMIME_write_ASN1(bio, (ASN1_VALUE *)p7, data, flags, + ctype_nid, mdalgs, + ASN1_ITEM_rptr(PKCS7)); } -/* 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; - -} - -/* 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 & PKCS7_BINARY) - { - while((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0) - BIO_write(out, linebuf, len); - } - else - { - if(flags & PKCS7_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))) { - PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_MIME_PARSE_ERROR); - return 0; - } - if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) { - PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_MIME_NO_CONTENT_TYPE); - sk_MIME_HEADER_pop_free(headers, mime_hdr_free); - return 0; - } - if (strcmp (hdr->value, "text/plain")) { - PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_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); - } 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, ¶m); - 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 |