diff options
Diffstat (limited to 'openssl/crypto/asn1/asn_mime.c')
| -rw-r--r-- | openssl/crypto/asn1/asn_mime.c | 942 |
1 files changed, 0 insertions, 942 deletions
diff --git a/openssl/crypto/asn1/asn_mime.c b/openssl/crypto/asn1/asn_mime.c deleted file mode 100644 index c1d1b122..00000000 --- a/openssl/crypto/asn1/asn_mime.c +++ /dev/null @@ -1,942 +0,0 @@ -/* 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> -#include "asn1_locl.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 int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags, - const ASN1_ITEM *it); -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 an ASN1 structure in BER format streaming if necessary */ - -int i2d_ASN1_bio_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags, - const ASN1_ITEM *it) - { - /* If streaming create stream BIO and copy all content through it */ - if (flags & SMIME_STREAM) - { - BIO *bio, *tbio; - bio = BIO_new_NDEF(out, val, it); - if (!bio) - { - ASN1err(ASN1_F_I2D_ASN1_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 ASN1 structure which will have all content - * stored internally - */ - else - ASN1_item_i2d_bio(it, out, val); - return 1; - } - -/* 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 = i2d_ASN1_bio_stream(out, val, in, flags, it); - (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, ret = 0, 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); - 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_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags, - int ctype_nid, int econt_nid, - STACK_OF(X509_ALGOR) *mdalgs, - 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 (!asn1_output_data(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; -} - -/* 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; - - } - -/* 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); - if (len < 0) - return 0; - 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; - /* 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 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; - } |