--- /dev/null
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#if defined(USE_QSOSSL)
+
+#include <curl/curl.h>
+#include "urldata.h"
+#include "strequal.h"
+#include "hostcheck.h"
+#include "sslgen.h"
+#include "sendf.h"
+#include "inet_pton.h"
+#include "curl_base64.h"
+#include "x509asn1.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+
+/* ASN.1 OIDs. */
+static const char cnOID[] = "2.5.4.3"; /* Common name. */
+static const char sanOID[] = "2.5.29.17"; /* Subject alternative name. */
+
+static const curl_OID OIDtable[] = {
+ { "1.2.840.10040.4.1", "dsa" },
+ { "1.2.840.10040.4.3", "dsa-with-sha1" },
+ { "1.2.840.10045.2.1", "ecPublicKey" },
+ { "1.2.840.10045.3.0.1", "c2pnb163v1" },
+ { "1.2.840.10045.4.1", "ecdsa-with-SHA1" },
+ { "1.2.840.10046.2.1", "dhpublicnumber" },
+ { "1.2.840.113549.1.1.1", "rsaEncryption" },
+ { "1.2.840.113549.1.1.2", "md2WithRSAEncryption" },
+ { "1.2.840.113549.1.1.4", "md5WithRSAEncryption" },
+ { "1.2.840.113549.1.1.5", "sha1WithRSAEncryption" },
+ { "1.2.840.113549.1.1.10", "RSASSA-PSS" },
+ { "1.2.840.113549.1.1.14", "sha224WithRSAEncryption" },
+ { "1.2.840.113549.1.1.11", "sha256WithRSAEncryption" },
+ { "1.2.840.113549.1.1.12", "sha384WithRSAEncryption" },
+ { "1.2.840.113549.1.1.13", "sha512WithRSAEncryption" },
+ { "1.2.840.113549.2.2", "md2" },
+ { "1.2.840.113549.2.5", "md5" },
+ { "1.3.14.3.2.26", "sha1" },
+ { cnOID, "CN" },
+ { "2.5.4.4", "SN" },
+ { "2.5.4.5", "serialNumber" },
+ { "2.5.4.6", "C" },
+ { "2.5.4.7", "L" },
+ { "2.5.4.8", "ST" },
+ { "2.5.4.9", "streetAddress" },
+ { "2.5.4.10", "O" },
+ { "2.5.4.11", "OU" },
+ { "2.5.4.12", "title" },
+ { "2.5.4.13", "description" },
+ { "2.5.4.17", "postalCode" },
+ { "2.5.4.41", "name" },
+ { "2.5.4.42", "givenName" },
+ { "2.5.4.43", "initials" },
+ { "2.5.4.44", "generationQualifier" },
+ { "2.5.4.45", "X500UniqueIdentifier" },
+ { "2.5.4.46", "dnQualifier" },
+ { "2.5.4.65", "pseudonym" },
+ { "1.2.840.113549.1.9.1", "emailAddress" },
+ { "2.5.4.72", "role" },
+ { sanOID, "subjectAltName" },
+ { "2.5.29.18", "issuerAltName" },
+ { "2.5.29.19", "basicConstraints" },
+ { "2.16.840.1.101.3.4.2.4", "sha224" },
+ { "2.16.840.1.101.3.4.2.1", "sha256" },
+ { "2.16.840.1.101.3.4.2.2", "sha384" },
+ { "2.16.840.1.101.3.4.2.3", "sha512" },
+ { (const char *) NULL, (const char *) NULL }
+};
+
+/*
+ * Lightweight ASN.1 parser.
+ * In particular, it does not check for syntactic/lexical errors.
+ * It is intended to support certificate information gathering for SSL backends
+ * that offer a mean to get certificates as a whole, but do not supply
+ * entry points to get particular certificate sub-fields.
+ * Please note there is no pretention here to rewrite a full SSL library.
+ */
+
+
+const char * Curl_getASN1Element(curl_asn1Element * elem,
+ const char * beg, const char * end)
+{
+ unsigned char b;
+ unsigned long len;
+ curl_asn1Element lelem;
+
+ /* Get a single ASN.1 element into `elem', parse ASN.1 string at `beg'
+ ending at `end'.
+ Returns a pointer in source string after the parsed element, or NULL
+ if an error occurs. */
+
+ if(beg >= end || !*beg)
+ return (const char *) NULL;
+
+ /* Process header byte. */
+ b = (unsigned char) *beg++;
+ elem->constructed = (b & 0x20) != 0;
+ elem->class = (b >> 6) & 3;
+ b &= 0x1F;
+ if(b == 0x1F)
+ return (const char *) NULL; /* Long tag values not supported here. */
+ elem->tag = b;
+
+ /* Process length. */
+ if(beg >= end)
+ return (const char *) NULL;
+ b = (unsigned char) *beg++;
+ if(!(b & 0x80))
+ len = b;
+ else if(!(b &= 0x7F)) {
+ /* Unspecified length. Since we have all the data, we can determine the
+ effective length by skipping element until an end element is found. */
+ if(!elem->constructed)
+ return (const char *) NULL;
+ elem->beg = beg;
+ while(beg < end && *beg) {
+ beg = Curl_getASN1Element(&lelem, beg, end);
+ if(!beg)
+ return (const char *) NULL;
+ }
+ if(beg >= end)
+ return (const char *) NULL;
+ elem->end = beg;
+ return beg + 1;
+ }
+ else if(beg + b > end)
+ return (const char *) NULL; /* Does not fit in source. */
+ else {
+ /* Get long length. */
+ len = 0;
+ do {
+ if(len & 0xFF000000L)
+ return (const char *) NULL; /* Lengths > 32 bits are not supported. */
+ len = (len << 8) | (unsigned char) *beg++;
+ } while(--b);
+ }
+ if((unsigned long) (end - beg) < len)
+ return (const char *) NULL; /* Element data does not fit in source. */
+ elem->beg = beg;
+ elem->end = beg + len;
+ return elem->end;
+}
+
+static const curl_OID * searchOID(const char * oid)
+{
+ const curl_OID * op;
+
+ /* Search the null terminated OID or OID identifier in local table.
+ Return the table entry pointer or NULL if not found. */
+
+ for(op = OIDtable; op->numoid; op++)
+ if(!strcmp(op->numoid, oid) || curl_strequal(op->textoid, oid))
+ return op;
+
+ return (const curl_OID *) NULL;
+}
+
+static const char * bool2str(const char * beg, const char * end)
+{
+ /* Convert an ASN.1 Boolean value into its string representation.
+ Return the dynamically allocated string, or NULL if source is not an
+ ASN.1 Boolean value. */
+
+ if(end - beg != 1)
+ return (const char *) NULL;
+ return strdup(*beg? "TRUE": "FALSE");
+}
+
+static const char * octet2str(const char * beg, const char * end)
+{
+ size_t n = end - beg;
+ char * buf;
+
+ /* Convert an ASN.1 octet string to a printable string.
+ Return the dynamically allocated string, or NULL if an error occurs. */
+
+ buf = malloc(3 * n + 1);
+ if(buf)
+ for(n = 0; beg < end; n += 3)
+ snprintf(buf + n, 4, "%02x:", *(const unsigned char *) beg++);
+ return buf;
+}
+
+static const char * bit2str(const char * beg, const char * end)
+
+{
+ /* Convert an ASN.1 bit string to a printable string.
+ Return the dynamically allocated string, or NULL if an error occurs. */
+
+ if(++beg > end)
+ return (const char *) NULL;
+ return octet2str(beg, end);
+}
+
+static const char * int2str(const char * beg, const char * end)
+{
+ long val = 0;
+ size_t n = end - beg;
+
+ /* Convert an ASN.1 integer value into its string representation.
+ Return the dynamically allocated string, or NULL if source is not an
+ ASN.1 integer value. */
+
+ if(!n)
+ return (const char *) NULL;
+
+ if(n > 4)
+ return octet2str(beg, end);
+
+ /* Represent integers <= 32-bit as a single value. */
+ if(*beg & 0x80)
+ val = ~val;
+
+ do
+ val = (val << 8) | *(const unsigned char *) beg++;
+ while(beg < end);
+ return curl_maprintf("%s%lx", (val < 0 || val >= 10)? "0x": "", val);
+}
+
+static ssize_t
+utf8asn1str(char * * to, int type, const char * from, const char * end)
+{
+ size_t inlength = end - from;
+ int size = 1;
+ size_t outlength;
+ int chsize;
+ unsigned int wc;
+ char * buf;
+
+ /* Perform a lazy conversion from an ASN.1 typed string to UTF8. Allocate the
+ destination buffer dynamically. The allocation size will normally be too
+ large: this is to avoid buffer overflows.
+ Terminate the string with a nul byte and return the converted
+ string length. */
+
+ *to = (char *) NULL;
+ switch (type) {
+ case CURL_ASN1_BMP_STRING:
+ size = 2;
+ break;
+ case CURL_ASN1_UNIVERSAL_STRING:
+ size = 4;
+ break;
+ case CURL_ASN1_NUMERIC_STRING:
+ case CURL_ASN1_PRINTABLE_STRING:
+ case CURL_ASN1_TELETEX_STRING:
+ case CURL_ASN1_IA5_STRING:
+ case CURL_ASN1_VISIBLE_STRING:
+ case CURL_ASN1_UTF8_STRING:
+ break;
+ default:
+ return -1; /* Conversion not supported. */
+ }
+
+ if(inlength % size)
+ return -1; /* Length inconsistent with character size. */
+ buf = malloc(4 * (inlength / size) + 1);
+ if(!buf)
+ return -1; /* Not enough memory. */
+
+ if(type == CURL_ASN1_UTF8_STRING) {
+ /* Just copy. */
+ outlength = inlength;
+ if(outlength)
+ memcpy(buf, from, outlength);
+ }
+ else {
+ for(outlength = 0; from < end;) {
+ wc = 0;
+ switch (size) {
+ case 4:
+ wc = (wc << 8) | *(const unsigned char *) from++;
+ wc = (wc << 8) | *(const unsigned char *) from++;
+ case 2:
+ wc = (wc << 8) | *(const unsigned char *) from++;
+ default: /* case 1: */
+ wc = (wc << 8) | *(const unsigned char *) from++;
+ }
+ chsize = 1;
+ if(wc >= 0x00000080) {
+ if(wc >= 0x00000800) {
+ if(wc >= 0x00010000) {
+ if(wc >= 0x00200000) {
+ free(buf);
+ return -1; /* Invalid char. size for target encoding. */
+ }
+ buf[outlength + 3] = (char) (0x80 | (wc & 0x3F));
+ wc = (wc >> 6) | 0x00010000;
+ chsize++;
+ }
+ buf[outlength + 2] = (char) (0x80 | (wc & 0x3F));
+ wc = (wc >> 6) | 0x00000800;
+ chsize++;
+ }
+ buf[outlength + 1] = (char) (0x80 | (wc & 0x3F));
+ wc = (wc >> 6) | 0x000000C0;
+ chsize++;
+ }
+ buf[outlength] = (char) wc;
+ outlength += chsize;
+ }
+ }
+ buf[outlength] = '\0';
+ *to = buf;
+ return outlength;
+}
+
+static const char * string2str(int type, const char * beg, const char * end)
+{
+ char * buf;
+
+ /* Convert an ASN.1 String into its UTF-8 string representation.
+ Return the dynamically allocated string, or NULL if an error occurs. */
+
+ if(utf8asn1str(&buf, type, beg, end) < 0)
+ return (const char *) NULL;
+ return buf;
+}
+
+static int encodeUint(char * buf, int n, unsigned int x)
+{
+ int i = 0;
+ unsigned int y = x / 10;
+
+ /* Decimal ASCII encode unsigned integer `x' in the `n'-byte buffer at `buf'.
+ Return the total number of encoded digits, even if larger than `n'. */
+
+ if(y) {
+ i += encodeUint(buf, n, y);
+ x -= y * 10;
+ }
+ if(i < n)
+ buf[i] = (char) ('0' + x);
+ i++;
+ if(i < n)
+ buf[i] = '\0'; /* Store a terminator if possible. */
+ return i;
+}
+
+static int encodeOID(char * buf, int n, const char * beg, const char * end)
+{
+ int i = 0;
+ unsigned int x;
+ unsigned int y;
+
+ /* Convert an ASN.1 OID into its dotted string representation.
+ Store the result in th `n'-byte buffer at `buf'.
+ Return the converted string length, or -1 if an error occurs. */
+
+ /* Process the first two numbers. */
+ y = *(const unsigned char *) beg++;
+ x = y / 40;
+ y -= x * 40;
+ i += encodeUint(buf + i, n - i, x);
+ if(i < n)
+ buf[i] = '.';
+ i++;
+ i += encodeUint(buf + i, n - i, y);
+
+ /* Process the trailing numbers. */
+ while(beg < end) {
+ if(i < n)
+ buf[i] = '.';
+ i++;
+ x = 0;
+ do {
+ if(x & 0xFF000000)
+ return -1;
+ y = *(const unsigned char *) beg++;
+ x = (x << 7) | (y & 0x7F);
+ } while(y & 0x80);
+ i += encodeUint(buf + i, n - i, x);
+ }
+ if(i < n)
+ buf[i] = '\0';
+ return i;
+}
+
+static const char * OID2str(const char * beg, const char * end, bool symbolic)
+{
+ char * buf = (char *) NULL;
+ const curl_OID * op;
+ int n;
+
+ /* Convert an ASN.1 OID into its dotted or symbolic string representation.
+ Return the dynamically allocated string, or NULL if an error occurs. */
+
+ if(beg < end) {
+ n = encodeOID((char *) NULL, -1, beg, end);
+ if(n >= 0) {
+ buf = malloc(n + 1);
+ if(buf) {
+ encodeOID(buf, n, beg, end);
+ buf[n] = '\0';
+
+ if(symbolic) {
+ op = searchOID(buf);
+ if(op) {
+ free(buf);
+ buf = strdup(op->textoid);
+ }
+ }
+ }
+ }
+ }
+ return buf;
+}
+
+static const char * GTime2str(const char * beg, const char * end)
+{
+ const char * tzp;
+ const char * fracp;
+ char sec1, sec2;
+ size_t fracl;
+ size_t tzl;
+ const char * sep = "";
+
+ /* Convert an ASN.1 Generalized time to a printable string.
+ Return the dynamically allocated string, or NULL if an error occurs. */
+
+ for(fracp = beg; fracp < end && *fracp >= '0' && *fracp <= '9'; fracp++)
+ ;
+
+ /* Get seconds digits. */
+ sec1 = '0';
+ switch (fracp - beg - 12) {
+ case 0:
+ sec2 = '0';
+ break;
+ case 2:
+ sec1 = fracp[-2];
+ case 1:
+ sec2 = fracp[-1];
+ break;
+ default:
+ return (const char *) NULL;
+ }
+
+ /* Scan for timezone, measure fractional seconds. */
+ tzp = fracp;
+ fracl = 0;
+ if(fracp < end && (*fracp == '.' || *fracp == ',')) {
+ fracp++;
+ do
+ tzp++;
+ while(tzp < end && *tzp >= '0' && *tzp <= '9');
+ /* Strip leading zeroes in fractional seconds. */
+ for(fracl = tzp - fracp - 1; fracl && fracp[fracl - 1] == '0'; fracl--)
+ ;
+ }
+
+ /* Process timezone. */
+ if(tzp >= end)
+ ; /* Nothing to do. */
+ else if(*tzp == 'Z') {
+ tzp = " GMT";
+ end = tzp + 4;
+ }
+ else {
+ sep = " ";
+ tzp++;
+ }
+
+ tzl = end - tzp;
+ return curl_maprintf("%.4s-%.2s-%.2s %.2s:%.2s:%c%c%s%.*s%s%.*s",
+ beg, beg + 4, beg + 6,
+ beg + 8, beg + 10, sec1, sec2,
+ fracl? ".": "", fracl, fracp,
+ sep, tzl, tzp);
+}
+
+static const char * UTime2str(const char * beg, const char * end)
+{
+ const char * tzp;
+ size_t tzl;
+ const char * sec;
+
+ /* Convert an ASN.1 UTC time to a printable string.
+ Return the dynamically allocated string, or NULL if an error occurs. */
+
+ for(tzp = beg; tzp < end && *tzp >= '0' && *tzp <= '9'; tzp++)
+ ;
+ /* Get the seconds. */
+ sec = beg + 10;
+ switch (tzp - sec) {
+ case 0:
+ sec = "00";
+ case 2:
+ break;
+ default:
+ return (const char *) NULL;
+ }
+
+ /* Process timezone. */
+ if(tzp >= end)
+ return (const char *) NULL;
+ if(*tzp == 'Z') {
+ tzp = "GMT";
+ end = tzp + 3;
+ }
+ else
+ tzp++;
+
+ tzl = end - tzp;
+ return curl_maprintf("%u%.2s-%.2s-%.2s %.2s:%.2s:%.2s %.*s",
+ 20 - (*beg >= '5'), beg, beg + 2, beg + 4,
+ beg + 6, beg + 8, sec,
+ tzl, tzp);
+}
+
+const char * Curl_ASN1tostr(curl_asn1Element * elem, int type)
+{
+ static const char zero = '\0';
+
+ /* Convert an ASN.1 element to a printable string.
+ Return the dynamically allocated string, or NULL if an error occurs. */
+
+ if(elem->constructed)
+ return (const char *) NULL; /* No conversion of structured elements. */
+
+ if(!type)
+ type = elem->tag; /* Type not forced: use element tag as type. */
+
+ switch (type) {
+ case CURL_ASN1_BOOLEAN:
+ return bool2str(elem->beg, elem->end);
+ case CURL_ASN1_INTEGER:
+ case CURL_ASN1_ENUMERATED:
+ return int2str(elem->beg, elem->end);
+ case CURL_ASN1_BIT_STRING:
+ return bit2str(elem->beg, elem->end);
+ case CURL_ASN1_OCTET_STRING:
+ return octet2str(elem->beg, elem->end);
+ case CURL_ASN1_NULL:
+ return strdup(&zero);
+ case CURL_ASN1_OBJECT_IDENTIFIER:
+ return OID2str(elem->beg, elem->end, TRUE);
+ case CURL_ASN1_UTC_TIME:
+ return UTime2str(elem->beg, elem->end);
+ case CURL_ASN1_GENERALIZED_TIME:
+ return GTime2str(elem->beg, elem->end);
+ case CURL_ASN1_UTF8_STRING:
+ case CURL_ASN1_NUMERIC_STRING:
+ case CURL_ASN1_PRINTABLE_STRING:
+ case CURL_ASN1_TELETEX_STRING:
+ case CURL_ASN1_IA5_STRING:
+ case CURL_ASN1_VISIBLE_STRING:
+ case CURL_ASN1_UNIVERSAL_STRING:
+ case CURL_ASN1_BMP_STRING:
+ return string2str(type, elem->beg, elem->end);
+ }
+
+ return (const char *) NULL; /* Unsupported. */
+}
+
+static ssize_t encodeDN(char * buf, size_t n, curl_asn1Element * dn)
+{
+ curl_asn1Element rdn;
+ curl_asn1Element atv;
+ curl_asn1Element oid;
+ curl_asn1Element value;
+ size_t l = 0;
+ const char * p1;
+ const char * p2;
+ const char * p3;
+ const char * str;
+
+ /* ASCII encode distinguished name at `dn' into the `n'-byte buffer at `buf'.
+ Return the total string length, even if larger than `n'. */
+
+ for(p1 = dn->beg; p1 < dn->end;) {
+ p1 = Curl_getASN1Element(&rdn, p1, dn->end);
+ for(p2 = rdn.beg; p2 < rdn.end;) {
+ p2 = Curl_getASN1Element(&atv, p2, rdn.end);
+ p3 = Curl_getASN1Element(&oid, atv.beg, atv.end);
+ Curl_getASN1Element(&value, p3, atv.end);
+ str = Curl_ASN1tostr(&oid, 0);
+ if(!str)
+ return -1;
+
+ /* Encode delimiter.
+ If attribute has a short uppercase name, delimiter is ", ". */
+ if(l) {
+ for(p3 = str; isupper(*p3); p3++)
+ ;
+ for(p3 = (*p3 || p3 - str > 2)? "/": ", "; *p3; p3++) {
+ if(l < n)
+ buf[l] = *p3;
+ l++;
+ }
+ }
+
+ /* Encode attribute name. */
+ for(p3 = str; *p3; p3++) {
+ if(l < n)
+ buf[l] = *p3;
+ l++;
+ }
+ free((char *) str);
+
+ /* Generate equal sign. */
+ if(l < n)
+ buf[l] = '=';
+ l++;
+
+ /* Generate value. */
+ str = Curl_ASN1tostr(&value, 0);
+ if(!str)
+ return -1;
+ for(p3 = str; *p3; p3++) {
+ if(l < n)
+ buf[l] = *p3;
+ l++;
+ }
+ free((char *) str);
+ }
+ }
+
+ return l;
+}
+
+const char * Curl_DNtostr(curl_asn1Element * dn)
+{
+ char * buf = (char *) NULL;
+ ssize_t n = encodeDN(buf, 0, dn);
+
+ /* Convert an ASN.1 distinguished name into a printable string.
+ Return the dynamically allocated string, or NULL if an error occurs. */
+
+ if(n >= 0) {
+ buf = malloc(n + 1);
+ if(buf) {
+ encodeDN(buf, n + 1, dn);
+ buf[n] = '\0';
+ }
+ }
+ return (const char *) buf;
+}
+
+static const char * checkOID(const char * beg, const char * end,
+ const char * oid)
+{
+ curl_asn1Element e;
+ const char * ccp;
+ const char * p;
+ bool matched;
+
+ /* Check if first ASN.1 element at `beg' is the given OID.
+ Return a pointer in the source after the OID if found, else NULL. */
+
+ ccp = Curl_getASN1Element(&e, beg, end);
+ if(!ccp || e.tag != CURL_ASN1_OBJECT_IDENTIFIER)
+ return (const char *) NULL;
+
+ p = OID2str(e.beg, e.end, FALSE);
+ if(!p)
+ return (const char *) NULL;
+
+ matched = !strcmp(p, oid);
+ free((char *) p);
+ return matched? ccp: (const char *) NULL;
+}
+
+
+/*
+ * X509 parser.
+ */
+
+void Curl_parseX509(curl_X509certificate * cert,
+ const char * beg, const char * end)
+{
+ curl_asn1Element elem;
+ curl_asn1Element tbsCertificate;
+ const char * ccp;
+ static const char defaultVersion = 0; /* v1. */
+
+ /* ASN.1 parse an X509 certificate into structure subfields.
+ Syntax is assumed to have already been checked by the SSL backend.
+ See RFC 5280. */
+
+ cert->certificate.beg = beg;
+ cert->certificate.end = end;
+
+ /* Get the sequence content. */
+ Curl_getASN1Element(&elem, beg, end);
+ beg = elem.beg;
+ end = elem.end;
+
+ /* Get tbsCertificate. */
+ beg = Curl_getASN1Element(&tbsCertificate, beg, end);
+ /* Skip the signatureAlgorithm. */
+ beg = Curl_getASN1Element(&cert->signatureAlgorithm, beg, end);
+ /* Get the signatureValue. */
+ Curl_getASN1Element(&cert->signature, beg, end);
+
+ /* Parse TBSCertificate. */
+ beg = tbsCertificate.beg;
+ end = tbsCertificate.end;
+ /* Get optional version, get serialNumber. */
+ cert->version.beg = &defaultVersion;
+ cert->version.end = &defaultVersion + sizeof defaultVersion;;
+ beg = Curl_getASN1Element(&elem, beg, end);
+ if(elem.tag == 0) {
+ Curl_getASN1Element(&cert->version, elem.beg, elem.end);
+ beg = Curl_getASN1Element(&elem, beg, end);
+ }
+ cert->serialNumber = elem;
+ /* Get signature algorithm. */
+ beg = Curl_getASN1Element(&cert->signatureAlgorithm, beg, end);
+ /* Get issuer. */
+ beg = Curl_getASN1Element(&cert->issuer, beg, end);
+ /* Get notBefore and notAfter. */
+ beg = Curl_getASN1Element(&elem, beg, end);
+ ccp = Curl_getASN1Element(&cert->notBefore, elem.beg, elem.end);
+ Curl_getASN1Element(&cert->notAfter, ccp, elem.end);
+ /* Get subject. */
+ beg = Curl_getASN1Element(&cert->subject, beg, end);
+ /* Get subjectPublicKeyAlgorithm and subjectPublicKey. */
+ beg = Curl_getASN1Element(&elem, beg, end);
+ ccp = Curl_getASN1Element(&cert->subjectPublicKeyAlgorithm,
+ elem.beg, elem.end);
+ Curl_getASN1Element(&cert->subjectPublicKey, ccp, elem.end);
+ /* Get optional issuerUiqueID, subjectUniqueID and extensions. */
+ cert->issuerUniqueID.tag = cert->subjectUniqueID.tag = 0;
+ cert->extensions.tag = elem.tag = 0;
+ cert->issuerUniqueID.beg = cert->issuerUniqueID.end = "";
+ cert->subjectUniqueID.beg = cert->subjectUniqueID.end = "";
+ cert->extensions.beg = cert->extensions.end = "";
+ if(beg < end)
+ beg = Curl_getASN1Element(&elem, beg, end);
+ if(elem.tag == 1) {
+ cert->issuerUniqueID = elem;
+ if(beg < end)
+ beg = Curl_getASN1Element(&elem, beg, end);
+ }
+ if(elem.tag == 2) {
+ cert->subjectUniqueID = elem;
+ if(beg < end)
+ beg = Curl_getASN1Element(&elem, beg, end);
+ }
+ if(elem.tag == 3)
+ Curl_getASN1Element(&cert->extensions, elem.beg, elem.end);
+}
+
+static size_t copySubstring(char * to, const char * from)
+{
+ size_t i;
+
+ /* Copy at most 64-characters, terminate with a newline and returns the
+ effective number of stored characters. */
+
+ for(i = 0; i < 64; i++) {
+ to[i] = *from;
+ if(!*from++)
+ break;
+ }
+
+ to[i++] = '\n';
+ return i;
+}
+
+static const char * dumpAlgo(curl_asn1Element * param,
+ const char * beg, const char * end)
+{
+ curl_asn1Element oid;
+
+ /* Get algorithm parameters and return algorithm name. */
+
+ beg = Curl_getASN1Element(&oid, beg, end);
+ param->tag = 0;
+ param->beg = param->end = end;
+ if(beg < end)
+ Curl_getASN1Element(param, beg, end);
+ return OID2str(oid.beg, oid.end, TRUE);
+}
+
+static void do_pubkey_field(struct SessionHandle *data, int certnum,
+ const char * label, curl_asn1Element * elem)
+{
+ const char * output;
+
+ /* Generate a certificate information record for the public key. */
+
+ output = Curl_ASN1tostr(elem, 0);
+ if(output) {
+ Curl_ssl_push_certinfo(data, certnum, label, output);
+ infof(data, " %s: %s\n", label, output);
+ free((char *) output);
+ }
+}
+
+static void do_pubkey(struct SessionHandle * data, int certnum,
+ const char * algo, curl_asn1Element * param,
+ curl_asn1Element * pubkey)
+{
+ curl_asn1Element elem;
+ curl_asn1Element pk;
+ const char * p;
+ const char * q;
+ unsigned long len;
+ unsigned int i;
+
+ /* Generate all information records for the public key. */
+
+ /* Get the public key (single element). */
+ Curl_getASN1Element(&pk, pubkey->beg + 1, pubkey->end);
+
+ if(curl_strequal(algo, "rsaEncryption")) {
+ p = Curl_getASN1Element(&elem, pk.beg, pk.end);
+ /* Compute key length. */
+ for(q = elem.beg; !*q && q < elem.end; q++)
+ ;
+ len = (elem.end - q) * 8;
+ if(len)
+ for(i = *(unsigned char *) q; !(i & 0x80); i <<= 1)
+ len--;
+ if(len > 32)
+ elem.beg = q; /* Strip leading zero bytes. */
+ infof(data, " RSA Public Key (%lu bits)\n", len);
+ q = curl_maprintf("%lu", len);
+ if(q) {
+ Curl_ssl_push_certinfo(data, certnum, "RSA Public Key", q);
+ free((char *) q);
+ }
+ /* Generate coefficients. */
+ do_pubkey_field(data, certnum, "rsa(n)", &elem);
+ Curl_getASN1Element(&elem, p, pk.end);
+ do_pubkey_field(data, certnum, "rsa(e)", &elem);
+ }
+ else if(curl_strequal(algo, "dsa")) {
+ p = Curl_getASN1Element(&elem, param->beg, param->end);
+ do_pubkey_field(data, certnum, "dsa(p)", &elem);
+ p = Curl_getASN1Element(&elem, p, param->end);
+ do_pubkey_field(data, certnum, "dsa(q)", &elem);
+ Curl_getASN1Element(&elem, p, param->end);
+ do_pubkey_field(data, certnum, "dsa(g)", &elem);
+ do_pubkey_field(data, certnum, "dsa(pub_key)", &pk);
+ }
+ else if(curl_strequal(algo, "dhpublicnumber")) {
+ p = Curl_getASN1Element(&elem, param->beg, param->end);
+ do_pubkey_field(data, certnum, "dh(p)", &elem);
+ Curl_getASN1Element(&elem, param->beg, param->end);
+ do_pubkey_field(data, certnum, "dh(g)", &elem);
+ do_pubkey_field(data, certnum, "dh(pub_key)", &pk);
+ }
+#if 0 /* Patent-encumbered. */
+ else if(curl_strequal(algo, "ecPublicKey")) {
+ /* Left TODO. */
+ }
+#endif
+}
+
+CURLcode Curl_extract_certinfo(struct connectdata * conn,
+ int certnum,
+ const char * beg,
+ const char * end)
+{
+ curl_X509certificate cert;
+ struct SessionHandle * data = conn->data;
+ curl_asn1Element param;
+ const char * ccp;
+ char * cp1;
+ size_t cl1;
+ char * cp2;
+ CURLcode cc;
+ unsigned long version;
+ size_t i;
+ size_t j;
+
+ /* Prepare the certificate information for curl_easy_getinfo(). */
+
+ /* Extract the certificate ASN.1 elements. */
+ Curl_parseX509(&cert, beg, end);
+
+ /* Subject. */
+ ccp = Curl_DNtostr(&cert.subject);
+ if(!ccp)
+ return CURLE_OUT_OF_MEMORY;
+ Curl_ssl_push_certinfo(data, certnum, "Subject", ccp);
+ infof(data, "%2d Subject: %s\n", certnum, ccp);
+ free((char *) ccp);
+
+ /* Issuer. */
+ ccp = Curl_DNtostr(&cert.issuer);
+ if(!ccp)
+ return CURLE_OUT_OF_MEMORY;
+ Curl_ssl_push_certinfo(data, certnum, "Issuer", ccp);
+ infof(data, " Issuer: %s\n", ccp);
+ free((char *) ccp);
+
+ /* Version (always fits in less than 32 bits). */
+ version = 0;
+ for(ccp = cert.version.beg; ccp < cert.version.end; ccp++)
+ version = (version << 8) | *(const unsigned char *) ccp;
+ ccp = curl_maprintf("%lx", version);
+ if(!ccp)
+ return CURLE_OUT_OF_MEMORY;
+ Curl_ssl_push_certinfo(data, certnum, "Version", ccp);
+ free((char *) ccp);
+ infof(data, " Version: %lu (0x%lx)\n", version + 1, version);
+
+ /* Serial number. */
+ ccp = Curl_ASN1tostr(&cert.serialNumber, 0);
+ if(!ccp)
+ return CURLE_OUT_OF_MEMORY;
+ Curl_ssl_push_certinfo(data, certnum, "Serial Number", ccp);
+ infof(data, " Serial Number: %s\n", ccp);
+ free((char *) ccp);
+
+ /* Signature algorithm .*/
+ ccp = dumpAlgo(¶m, cert.signatureAlgorithm.beg,
+ cert.signatureAlgorithm.end);
+ if(!ccp)
+ return CURLE_OUT_OF_MEMORY;
+ Curl_ssl_push_certinfo(data, certnum, "Signature Algorithm", ccp);
+ infof(data, " Signature Algorithm: %s\n", ccp);
+ free((char *) ccp);
+
+ /* Start Date. */
+ ccp = Curl_ASN1tostr(&cert.notBefore, 0);
+ if(!ccp)
+ return CURLE_OUT_OF_MEMORY;
+ Curl_ssl_push_certinfo(data, certnum, "Start Date", ccp);
+ infof(data, " Start Date: %s\n", ccp);
+ free((char *) ccp);
+
+ /* Expire Date. */
+ ccp = Curl_ASN1tostr(&cert.notAfter, 0);
+ if(!ccp)
+ return CURLE_OUT_OF_MEMORY;
+ Curl_ssl_push_certinfo(data, certnum, "Expire Date", ccp);
+ infof(data, " Expire Date: %s\n", ccp);
+ free((char *) ccp);
+
+ /* Public Key Algorithm. */
+ ccp = dumpAlgo(¶m, cert.subjectPublicKeyAlgorithm.beg,
+ cert.subjectPublicKeyAlgorithm.end);
+ if(!ccp)
+ return CURLE_OUT_OF_MEMORY;
+ Curl_ssl_push_certinfo(data, certnum, "Public Key Algorithm", ccp);
+ infof(data, " Public Key Algorithm: %s\n", ccp);
+ do_pubkey(data, certnum, ccp, ¶m, &cert.subjectPublicKey);
+ free((char *) ccp);
+
+/* TODO: extensions. */
+
+ /* Signature. */
+ ccp = Curl_ASN1tostr(&cert.signature, 0);
+ if(!ccp)
+ return CURLE_OUT_OF_MEMORY;
+ Curl_ssl_push_certinfo(data, certnum, "Signature", ccp);
+ infof(data, " Signature: %s\n", ccp);
+ free((char *) ccp);
+
+ /* Generate PEM certificate. */
+ cc = Curl_base64_encode(data, cert.certificate.beg,
+ cert.certificate.end - cert.certificate.beg,
+ &cp1, &cl1);
+ if(cc != CURLE_OK)
+ return cc;
+ /* Compute the number of charaters in final certificate string. Format is:
+ -----BEGIN CERTIFICATE-----\n
+ <max 64 base64 characters>\n
+ .
+ .
+ .
+ -----END CERTIFICATE-----\n
+ */
+ i = 28 + cl1 + (cl1 + 64 - 1) / 64 + 26;
+ cp2 = malloc(i + 1);
+ if(!cp2) {
+ free(cp1);
+ return CURLE_OUT_OF_MEMORY;
+ }
+ /* Build the certificate string. */
+ i = copySubstring(cp2, "-----BEGIN CERTIFICATE-----");
+ for(j = 0; j < cl1; j += 64)
+ i += copySubstring(cp2 + i, cp1 + j);
+ i += copySubstring(cp2 + i, "-----END CERTIFICATE-----");
+ cp2[i] = '\0';
+ free(cp1);
+ Curl_ssl_push_certinfo(data, certnum, "Cert", cp2);
+ infof(data, "%s\n", cp2);
+ free(cp2);
+ return CURLE_OK;
+}
+
+
+CURLcode Curl_verifyhost(struct connectdata * conn,
+ const char * beg, const char * end)
+{
+ struct SessionHandle * data = conn->data;
+ curl_X509certificate cert;
+ curl_asn1Element dn;
+ curl_asn1Element elem;
+ curl_asn1Element ext;
+ curl_asn1Element name;
+ int i;
+ const char * p;
+ const char * q;
+ char * dnsname;
+ int matched = -1;
+ size_t addrlen = (size_t) -1;
+ ssize_t len;
+#ifdef ENABLE_IPV6
+ struct in6_addr addr;
+#else
+ struct in_addr addr;
+#endif
+
+ /* Verify that connection server matches info in X509 certificate at
+ `beg'..`end'. */
+
+ if(!data->set.ssl.verifyhost)
+ return CURLE_OK;
+
+ if(!beg)
+ return CURLE_PEER_FAILED_VERIFICATION;
+ Curl_parseX509(&cert, beg, end);
+
+ /* Get the server IP address. */
+#ifdef ENABLE_IPV6
+ if(conn->bits.ipv6_ip && Curl_inet_pton(AF_INET6, conn->host.name, &addr))
+ addrlen = sizeof(struct in6_addr);
+ else
+#endif
+ if(Curl_inet_pton(AF_INET, conn->host.name, &addr))
+ addrlen = sizeof(struct in_addr);
+
+ /* Process extensions. */
+ for(p = cert.extensions.beg; p < cert.extensions.end && matched != 1;) {
+ p = Curl_getASN1Element(&ext, p, cert.extensions.end);
+ /* Check if extension is a subjectAlternativeName. */
+ ext.beg = checkOID(ext.beg, ext.end, sanOID);
+ if(ext.beg) {
+ ext.beg = Curl_getASN1Element(&elem, ext.beg, ext.end);
+ /* Skip critical if present. */
+ if(elem.tag == CURL_ASN1_BOOLEAN)
+ ext.beg = Curl_getASN1Element(&elem, ext.beg, ext.end);
+ /* Parse the octet string contents: is a single sequence. */
+ Curl_getASN1Element(&elem, elem.beg, elem.end);
+ /* Check all GeneralNames. */
+ for(q = elem.beg; matched != 1 && q < elem.end;) {
+ q = Curl_getASN1Element(&name, q, elem.end);
+ switch (name.tag) {
+ case 2: /* DNS name. */
+ i = 0;
+ len = utf8asn1str(&dnsname, CURL_ASN1_IA5_STRING,
+ name.beg, name.end);
+ if(len > 0)
+ if(strlen(dnsname) == (size_t) len)
+ i = Curl_cert_hostcheck((const char *) dnsname, conn->host.name);
+ if(dnsname)
+ free(dnsname);
+ if(!i)
+ return CURLE_PEER_FAILED_VERIFICATION;
+ matched = i;
+ break;
+
+ case 7: /* IP address. */
+ matched = (size_t) (name.end - q) == addrlen &&
+ !memcmp(&addr, q, addrlen);
+ break;
+ }
+ }
+ }
+ }
+
+ switch (matched) {
+ case 1:
+ /* an alternative name matched the server hostname */
+ infof(data, "\t subjectAltName: %s matched\n", conn->host.dispname);
+ return CURLE_OK;
+ case 0:
+ /* an alternative name field existed, but didn't match and then
+ we MUST fail */
+ infof(data, "\t subjectAltName does not match %s\n", conn->host.dispname);
+ return CURLE_PEER_FAILED_VERIFICATION;
+ }
+
+ /* Process subject. */
+ name.beg = name.end = "";
+ q = cert.subject.beg;
+ /* we have to look to the last occurrence of a commonName in the
+ distinguished one to get the most significant one. */
+ while(q < cert.subject.end) {
+ q = Curl_getASN1Element(&dn, q, cert.subject.end);
+ for(p = dn.beg; p < dn.end;) {
+ p = Curl_getASN1Element(&elem, p, dn.end);
+ /* We have a DN's AttributeTypeAndValue: check it in case it's a CN. */
+ elem.beg = checkOID(elem.beg, elem.end, cnOID);
+ if(elem.beg)
+ name = elem; /* Latch CN. */
+ }
+ }
+
+ /* Check the CN if found. */
+ if(!Curl_getASN1Element(&elem, name.beg, name.end))
+ failf(data, "SSL: unable to obtain common name from peer certificate");
+ else {
+ len = utf8asn1str(&dnsname, elem.tag, elem.beg, elem.end);
+ if(len < 0) {
+ free(dnsname);
+ return CURLE_OUT_OF_MEMORY;
+ }
+ if(strlen(dnsname) != (size_t) len) /* Nul byte in string ? */
+ failf(data, "SSL: illegal cert name field");
+ else if(Curl_cert_hostcheck((const char *) dnsname, conn->host.name)) {
+ infof(data, "\t common name: %s (matched)\n", dnsname);
+ free(dnsname);
+ return CURLE_OK;
+ }
+ else
+ failf(data, "SSL: certificate subject name '%s' does not match "
+ "target host name '%s'", dnsname, conn->host.dispname);
+ free(dnsname);
+ }
+
+ return CURLE_PEER_FAILED_VERIFICATION;
+}
+
+#endif /* USE_QSOSSL */
projects / curl / commitdiff