| /* pk7_mime.c */ |
| /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| * project. |
| */ |
| /* ==================================================================== |
| * Copyright (c) 1999-2005 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. |
| * ==================================================================== |
| * |
| * 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> |
| #include <ctype.h> |
| #include "cryptlib.h" |
| #include <openssl/rand.h> |
| #include <openssl/x509.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); |
| |
| #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; |
| } |
| |
| /* 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 */ |
| |
| |
| 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; |
| |
| } |
| |
| /* 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, ¶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; |
| } |