/* * Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation * * Author: Nikos Mavrogiannopoulos * * This file is part of GNUTLS. * * The GNUTLS library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA * */ #include #include #include #include #include #include #include #include #include #include #include #include typedef struct _oid2string { const char *oid; const char *ldap_desc; int choice; /* of type DirectoryString */ int printable; } oid2string; /* This list contains all the OIDs that may be * contained in a rdnSequence and are printable. */ static const oid2string _oid2str[] = { /* PKIX */ {"1.3.6.1.5.5.7.9.1", "dateOfBirth", 0, 1}, {"1.3.6.1.5.5.7.9.2", "placeOfBirth", 0, 1}, {"1.3.6.1.5.5.7.9.3", "gender", 0, 1}, {"1.3.6.1.5.5.7.9.4", "countryOfCitizenship", 0, 1}, {"1.3.6.1.5.5.7.9.5", "countryOfResidence", 0, 1}, {"2.5.4.6", "C", 0, 1}, {"2.5.4.9", "STREET", 1, 1}, {"2.5.4.12", "T", 1, 1}, {"2.5.4.10", "O", 1, 1}, {"2.5.4.11", "OU", 1, 1}, {"2.5.4.3", "CN", 1, 1}, {"2.5.4.7", "L", 1, 1}, {"2.5.4.8", "ST", 1, 1}, {"2.5.4.5", "serialNumber", 0, 1}, {"2.5.4.20", "telephoneNumber", 0, 1}, {"2.5.4.4", "surName", 1, 1}, {"2.5.4.43", "initials", 1, 1}, {"2.5.4.44", "generationQualifier", 1, 1}, {"2.5.4.42", "givenName", 1, 1}, {"2.5.4.65", "pseudonym", 1, 1}, {"2.5.4.46", "dnQualifier", 0, 1}, {"0.9.2342.19200300.100.1.25", "DC", 0, 1}, {"0.9.2342.19200300.100.1.1", "UID", 1, 1}, /* PKCS #9 */ {"1.2.840.113549.1.9.1", "EMAIL", 0, 1}, {"1.2.840.113549.1.9.7", NULL, 1, 1}, /* friendly name */ {"1.2.840.113549.1.9.20", NULL, 0, 1}, {NULL, NULL, 0, 0} }; /* Returns 1 if the data defined by the OID are printable. */ int MHD__gnutls_x509_oid_data_printable (const char *oid) { int i = 0; do { if (strcmp (_oid2str[i].oid, oid) == 0) return _oid2str[i].printable; i++; } while (_oid2str[i].oid != NULL); return 0; } /** * MHD_gnutls_x509_dn_oid_known - This function will return true if the given OID is known * @oid: holds an Object Identifier in a null terminated string * * This function will inform about known DN OIDs. This is useful since functions * like MHD_gnutls_x509_crt_set_dn_by_oid() use the information on known * OIDs to properly encode their input. Object Identifiers that are not * known are not encoded by these functions, and their input is stored directly * into the ASN.1 structure. In that case of unknown OIDs, you have * the responsibility of DER encoding your data. * * Returns 1 on known OIDs and 0 otherwise. * **/ int MHD_gnutls_x509_dn_oid_known (const char *oid) { int i = 0; do { if (strcmp (_oid2str[i].oid, oid) == 0) return 1; i++; } while (_oid2str[i].oid != NULL); return 0; } /* Returns 1 if the data defined by the OID are of a choice * type. */ int MHD__gnutls_x509_oid_data_choice (const char *oid) { int i = 0; do { if (strcmp (_oid2str[i].oid, oid) == 0) return _oid2str[i].choice; i++; } while (_oid2str[i].oid != NULL); return 0; } const char * MHD__gnutls_x509_oid2ldap_string (const char *oid) { int i = 0; do { if (strcmp (_oid2str[i].oid, oid) == 0) return _oid2str[i].ldap_desc; i++; } while (_oid2str[i].oid != NULL); return NULL; } /* This function will convert an attribute value, specified by the OID, * to a string. The result will be a null terminated string. * * res may be null. This will just return the res_size, needed to * hold the string. */ int MHD__gnutls_x509_oid_data2string (const char *oid, void *value, int value_size, char *res, size_t * res_size) { char str[MAX_STRING_LEN], tmpname[128]; const char *ANAME = NULL; int CHOICE = -1, len = -1, result; ASN1_TYPE tmpasn = ASN1_TYPE_EMPTY; char MHD__asn1_err[MAX_ERROR_DESCRIPTION_SIZE] = ""; if (value == NULL || value_size <= 0 || res_size == NULL) { MHD_gnutls_assert (); return GNUTLS_E_INVALID_REQUEST; } if (MHD__gnutls_x509_oid_data_printable (oid) == 0) { MHD_gnutls_assert (); return GNUTLS_E_INTERNAL_ERROR; } ANAME = MHD__asn1_find_structure_from_oid (MHD__gnutls_get_pkix (), oid); CHOICE = MHD__gnutls_x509_oid_data_choice (oid); if (ANAME == NULL) { MHD_gnutls_assert (); return GNUTLS_E_INTERNAL_ERROR; } MHD_gtls_str_cpy (str, sizeof (str), "PKIX1."); MHD_gtls_str_cat (str, sizeof (str), ANAME); if ((result = MHD__asn1_create_element (MHD__gnutls_get_pkix (), str, &tmpasn)) != ASN1_SUCCESS) { MHD_gnutls_assert (); return MHD_gtls_asn2err (result); } if ((result = MHD__asn1_der_decoding (&tmpasn, value, value_size, MHD__asn1_err)) != ASN1_SUCCESS) { MHD_gnutls_assert (); MHD__gnutls_x509_log ("MHD__asn1_der_decoding: %s:%s\n", str, MHD__asn1_err); MHD__asn1_delete_structure (&tmpasn); return MHD_gtls_asn2err (result); } /* If this is a choice then we read the choice. Otherwise it * is the value; */ len = sizeof (str) - 1; if ((result = MHD__asn1_read_value (tmpasn, "", str, &len)) != ASN1_SUCCESS) { /* CHOICE */ MHD_gnutls_assert (); MHD__asn1_delete_structure (&tmpasn); return MHD_gtls_asn2err (result); } if (CHOICE == 0) { str[len] = 0; if (res) MHD_gtls_str_cpy (res, *res_size, str); *res_size = len; MHD__asn1_delete_structure (&tmpasn); } else { /* CHOICE */ int non_printable = 0, teletex = 0; str[len] = 0; /* Note that we do not support strings other than * UTF-8 (thus ASCII as well). */ if (strcmp (str, "printableString") != 0 && strcmp (str, "ia5String") != 0 && strcmp (str, "utf8String") != 0) { non_printable = 1; } if (strcmp (str, "teletexString") == 0) teletex = 1; MHD_gtls_str_cpy (tmpname, sizeof (tmpname), str); len = sizeof (str) - 1; if ((result = MHD__asn1_read_value (tmpasn, tmpname, str, &len)) != ASN1_SUCCESS) { MHD__asn1_delete_structure (&tmpasn); return MHD_gtls_asn2err (result); } MHD__asn1_delete_structure (&tmpasn); if (teletex != 0) { int ascii = 0, i; /* HACK: if the teletex string contains only ascii * characters then treat it as printable. */ for (i = 0; i < len; i++) if (!isascii (str[i])) ascii = 1; if (ascii == 0) non_printable = 0; } if (res) { if (non_printable == 0) { str[len] = 0; MHD_gtls_str_cpy (res, *res_size, str); *res_size = len; } else { result = MHD__gnutls_x509_data2hex ((const unsigned char*) str, len, (unsigned char*) res, res_size); if (result < 0) { MHD_gnutls_assert (); return result; } } } } return 0; } /* Converts a data string to an LDAP rfc2253 hex string * something like '#01020304' */ int MHD__gnutls_x509_data2hex (const opaque * data, size_t data_size, opaque * out, size_t * sizeof_out) { char *res; char escaped[MAX_STRING_LEN]; if (2 * data_size + 1 > MAX_STRING_LEN) { MHD_gnutls_assert (); return GNUTLS_E_INTERNAL_ERROR; } res = MHD_gtls_bin2hex (data, data_size, escaped, sizeof (escaped)); if (res) { unsigned int size = strlen (res) + 1; if (size + 1 > *sizeof_out) { *sizeof_out = size; return GNUTLS_E_SHORT_MEMORY_BUFFER; } *sizeof_out = size; /* -1 for the null +1 for the '#' */ if (out) { strcpy ((char*) out, "#"); strcat ((char*) out, res); } return 0; } else { MHD_gnutls_assert (); return GNUTLS_E_INTERNAL_ERROR; } return 0; } /* TIME functions * Convertions between generalized or UTC time to time_t * */ /* This is an emulations of the struct tm. * Since we do not use libc's functions, we don't need to * depend on the libc structure. */ typedef struct fake_tm { int tm_mon; int tm_year; /* FULL year - ie 1971 */ int tm_mday; int tm_hour; int tm_min; int tm_sec; } fake_tm; /* The mktime_utc function is due to Russ Allbery (rra@stanford.edu), * who placed it under public domain: */ /* The number of days in each month. */ static const int MONTHDAYS[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; /* Whether a given year is a leap year. */ #define ISLEAP(year) \ (((year) % 4) == 0 && (((year) % 100) != 0 || ((year) % 400) == 0)) /* ** Given a struct tm representing a calendar time in UTC, convert it to ** seconds since epoch. Returns (time_t) -1 if the time is not ** convertable. Note that this function does not canonicalize the provided ** struct tm, nor does it allow out of range values or years before 1970. */ static time_t mktime_utc (const struct fake_tm *tm) { time_t result = 0; int i; /* We do allow some ill-formed dates, but we don't do anything special * with them and our callers really shouldn't pass them to us. Do * explicitly disallow the ones that would cause invalid array accesses * or other algorithm problems. */ if (tm->tm_mon < 0 || tm->tm_mon > 11 || tm->tm_year < 1970) return (time_t) - 1; /* Convert to a time_t. */ for (i = 1970; i < tm->tm_year; i++) result += 365 + ISLEAP (i); for (i = 0; i < tm->tm_mon; i++) result += MONTHDAYS[i]; if (tm->tm_mon > 1 && ISLEAP (tm->tm_year)) result++; result = 24 * (result + tm->tm_mday - 1) + tm->tm_hour; result = 60 * result + tm->tm_min; result = 60 * result + tm->tm_sec; return result; } /* this one will parse dates of the form: * month|day|hour|minute|sec* (2 chars each) * and year is given. Returns a time_t date. */ static time_t MHD__gnutls_x509_time2gtime (const char *ttime, int year) { char xx[3]; struct fake_tm etime; time_t ret; if (strlen (ttime) < 8) { MHD_gnutls_assert (); return (time_t) - 1; } etime.tm_year = year; /* In order to work with 32 bit * time_t. */ if (sizeof (time_t) <= 4 && etime.tm_year >= 2038) return (time_t) 2145914603; /* 2037-12-31 23:23:23 */ xx[2] = 0; /* get the month */ memcpy (xx, ttime, 2); /* month */ etime.tm_mon = atoi (xx) - 1; ttime += 2; /* get the day */ memcpy (xx, ttime, 2); /* day */ etime.tm_mday = atoi (xx); ttime += 2; /* get the hour */ memcpy (xx, ttime, 2); /* hour */ etime.tm_hour = atoi (xx); ttime += 2; /* get the minutes */ memcpy (xx, ttime, 2); /* minutes */ etime.tm_min = atoi (xx); ttime += 2; if (strlen (ttime) >= 2) { memcpy (xx, ttime, 2); etime.tm_sec = atoi (xx); ttime += 2; } else etime.tm_sec = 0; ret = mktime_utc (&etime); return ret; } /* returns a time_t value that contains the given time. * The given time is expressed as: * YEAR(2)|MONTH(2)|DAY(2)|HOUR(2)|MIN(2)|SEC(2)* * * (seconds are optional) */ static time_t MHD__gnutls_x509_utcTime2gtime (const char *ttime) { char xx[3]; int year; if (strlen (ttime) < 10) { MHD_gnutls_assert (); return (time_t) - 1; } xx[2] = 0; /* get the year */ memcpy (xx, ttime, 2); /* year */ year = atoi (xx); ttime += 2; if (year > 49) year += 1900; else year += 2000; return MHD__gnutls_x509_time2gtime (ttime, year); } /* returns a time_t value that contains the given time. * The given time is expressed as: * YEAR(4)|MONTH(2)|DAY(2)|HOUR(2)|MIN(2)|SEC(2)* */ static time_t MHD__gnutls_x509_generalTime2gtime (const char *ttime) { char xx[5]; int year; if (strlen (ttime) < 12) { MHD_gnutls_assert (); return (time_t) - 1; } if (strchr (ttime, 'Z') == 0) { MHD_gnutls_assert (); /* sorry we don't support it yet */ return (time_t) - 1; } xx[4] = 0; /* get the year */ memcpy (xx, ttime, 4); /* year */ year = atoi (xx); ttime += 4; return MHD__gnutls_x509_time2gtime (ttime, year); } /* Extracts the time in time_t from the ASN1_TYPE given. When should * be something like "tbsCertList.thisUpdate". */ #define MAX_TIME 64 time_t MHD__gnutls_x509_get_time (ASN1_TYPE c2, const char *when) { char ttime[MAX_TIME]; char name[128]; time_t c_time = (time_t) - 1; int len, result; MHD_gtls_str_cpy (name, sizeof (name), when); len = sizeof (ttime) - 1; if ((result = MHD__asn1_read_value (c2, name, ttime, &len)) < 0) { MHD_gnutls_assert (); return (time_t) (-1); } /* CHOICE */ if (strcmp (ttime, "generalTime") == 0) { MHD_gtls_str_cat (name, sizeof (name), ".generalTime"); len = sizeof (ttime) - 1; result = MHD__asn1_read_value (c2, name, ttime, &len); if (result == ASN1_SUCCESS) c_time = MHD__gnutls_x509_generalTime2gtime (ttime); } else { /* UTCTIME */ MHD_gtls_str_cat (name, sizeof (name), ".utcTime"); len = sizeof (ttime) - 1; result = MHD__asn1_read_value (c2, name, ttime, &len); if (result == ASN1_SUCCESS) c_time = MHD__gnutls_x509_utcTime2gtime (ttime); } /* We cannot handle dates after 2031 in 32 bit machines. * a time_t of 64bits has to be used. */ if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); return (time_t) (-1); } return c_time; } MHD_gnutls_x509_subject_alt_name_t MHD__gnutls_x509_san_find_type (char *str_type) { if (strcmp (str_type, "dNSName") == 0) return GNUTLS_SAN_DNSNAME; if (strcmp (str_type, "rfc822Name") == 0) return GNUTLS_SAN_RFC822NAME; if (strcmp (str_type, "uniformResourceIdentifier") == 0) return GNUTLS_SAN_URI; if (strcmp (str_type, "iPAddress") == 0) return GNUTLS_SAN_IPADDRESS; if (strcmp (str_type, "otherName") == 0) return GNUTLS_SAN_OTHERNAME; if (strcmp (str_type, "directoryName") == 0) return GNUTLS_SAN_DN; return (MHD_gnutls_x509_subject_alt_name_t) - 1; } /* A generic export function. Will export the given ASN.1 encoded data * to PEM or DER raw data. */ int MHD__gnutls_x509_export_int (ASN1_TYPE MHD__asn1_data, MHD_gnutls_x509_crt_fmt_t format, char *pem_header, unsigned char *output_data, size_t * output_data_size) { int result, len; if (format == GNUTLS_X509_FMT_DER) { if (output_data == NULL) *output_data_size = 0; len = *output_data_size; if ((result = MHD__asn1_der_coding (MHD__asn1_data, "", output_data, &len, NULL)) != ASN1_SUCCESS) { *output_data_size = len; if (result == ASN1_MEM_ERROR) { return GNUTLS_E_SHORT_MEMORY_BUFFER; } MHD_gnutls_assert (); return MHD_gtls_asn2err (result); } *output_data_size = len; } else { /* PEM */ opaque *out; MHD_gnutls_datum_t tmp; result = MHD__gnutls_x509_der_encode (MHD__asn1_data, "", &tmp, 0); if (result < 0) { MHD_gnutls_assert (); return result; } result = MHD__gnutls_fbase64_encode (pem_header, tmp.data, tmp.size, &out); MHD__gnutls_free_datum (&tmp); if (result < 0) { MHD_gnutls_assert (); return result; } if (result == 0) { /* oooops */ MHD_gnutls_assert (); return GNUTLS_E_INTERNAL_ERROR; } if ((unsigned) result > *output_data_size) { MHD_gnutls_assert (); MHD_gnutls_free (out); *output_data_size = result; return GNUTLS_E_SHORT_MEMORY_BUFFER; } *output_data_size = result; if (output_data) { memcpy (output_data, out, result); /* do not include the null character into output size. */ *output_data_size = result - 1; } MHD_gnutls_free (out); } return 0; } /* Decodes an octet string. Leave string_type null for a normal * octet string. Otherwise put something like BMPString, PrintableString * etc. */ int MHD__gnutls_x509_decode_octet_string (const char *string_type, const opaque * der, size_t der_size, opaque * output, size_t * output_size) { ASN1_TYPE c2 = ASN1_TYPE_EMPTY; int result, tmp_output_size; char strname[64]; if (string_type == NULL) MHD_gtls_str_cpy (strname, sizeof (strname), "PKIX1.pkcs-7-Data"); else { MHD_gtls_str_cpy (strname, sizeof (strname), "PKIX1."); MHD_gtls_str_cat (strname, sizeof (strname), string_type); } if ((result = MHD__asn1_create_element (MHD__gnutls_get_pkix (), strname, &c2)) != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } result = MHD__asn1_der_decoding (&c2, der, der_size, NULL); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } tmp_output_size = *output_size; result = MHD__asn1_read_value (c2, "", output, &tmp_output_size); *output_size = tmp_output_size; if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } return 0; cleanup:if (c2) MHD__asn1_delete_structure (&c2); return result; } /* Reads a value from an ASN1 tree, and puts the output * in an allocated variable in the given datum. * flags == 0 do nothing with the DER output * flags == 1 parse the DER output as OCTET STRING * flags == 2 the value is a BIT STRING */ int MHD__gnutls_x509_read_value (ASN1_TYPE c, const char *root, MHD_gnutls_datum_t * ret, int flags) { int len = 0, result; size_t slen; opaque *tmp = NULL; result = MHD__asn1_read_value (c, root, NULL, &len); if (result != ASN1_MEM_ERROR) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); return result; } if (flags == 2) len /= 8; tmp = MHD_gnutls_malloc (len); if (tmp == NULL) { MHD_gnutls_assert (); result = GNUTLS_E_MEMORY_ERROR; goto cleanup; } result = MHD__asn1_read_value (c, root, tmp, &len); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } if (flags == 2) len /= 8; /* Extract the OCTET STRING. */ if (flags == 1) { slen = len; result = MHD__gnutls_x509_decode_octet_string (NULL, tmp, slen, tmp, &slen); if (result < 0) { MHD_gnutls_assert (); goto cleanup; } len = slen; } ret->data = tmp; ret->size = len; return 0; cleanup:MHD_gnutls_free (tmp); return result; } /* DER Encodes the src ASN1_TYPE and stores it to * the given datum. If str is non null then the data are encoded as * an OCTET STRING. */ int MHD__gnutls_x509_der_encode (ASN1_TYPE src, const char *src_name, MHD_gnutls_datum_t * res, int str) { int size, result; int asize; opaque *data = NULL; ASN1_TYPE c2 = ASN1_TYPE_EMPTY; size = 0; result = MHD__asn1_der_coding (src, src_name, NULL, &size, NULL); if (result != ASN1_MEM_ERROR) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } /* allocate data for the der */ if (str) size += 16; /* for later to include the octet tags */ asize = size; data = MHD_gnutls_malloc (size); if (data == NULL) { MHD_gnutls_assert (); result = GNUTLS_E_MEMORY_ERROR; goto cleanup; } result = MHD__asn1_der_coding (src, src_name, data, &size, NULL); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } if (str) { if ((result = MHD__asn1_create_element (MHD__gnutls_get_pkix (), "PKIX1.pkcs-7-Data", &c2)) != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } result = MHD__asn1_write_value (c2, "", data, size); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } result = MHD__asn1_der_coding (c2, "", data, &asize, NULL); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } size = asize; MHD__asn1_delete_structure (&c2); } res->data = data; res->size = size; return 0; cleanup:MHD_gnutls_free (data); MHD__asn1_delete_structure (&c2); return result; } /* DER Encodes the src ASN1_TYPE and stores it to * dest in dest_name. Useful to encode something and store it * as OCTET. If str is non null then the data are encoded as * an OCTET STRING. */ int MHD__gnutls_x509_der_encode_and_copy (ASN1_TYPE src, const char *src_name, ASN1_TYPE dest, const char *dest_name, int str) { int result; MHD_gnutls_datum_t encoded; result = MHD__gnutls_x509_der_encode (src, src_name, &encoded, str); if (result < 0) { MHD_gnutls_assert (); return result; } /* Write the data. */ result = MHD__asn1_write_value (dest, dest_name, encoded.data, encoded.size); MHD__gnutls_free_datum (&encoded); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); return MHD_gtls_asn2err (result); } return 0; } /* Writes the value of the datum in the given ASN1_TYPE. If str is non * zero it encodes it as OCTET STRING. */ int MHD__gnutls_x509_write_value (ASN1_TYPE c, const char *root, const MHD_gnutls_datum_t * data, int str) { int result; int asize; ASN1_TYPE c2 = ASN1_TYPE_EMPTY; MHD_gnutls_datum_t val; asize = data->size + 16; val.data = MHD_gnutls_malloc (asize); if (val.data == NULL) { MHD_gnutls_assert (); result = GNUTLS_E_MEMORY_ERROR; goto cleanup; } if (str) { /* Convert it to OCTET STRING */ if ((result = MHD__asn1_create_element (MHD__gnutls_get_pkix (), "PKIX1.pkcs-7-Data", &c2)) != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } result = MHD__asn1_write_value (c2, "", data->data, data->size); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); result = MHD_gtls_asn2err (result); goto cleanup; } result = MHD__gnutls_x509_der_encode (c2, "", &val, 0); if (result < 0) { MHD_gnutls_assert (); goto cleanup; } } else { val.data = data->data; val.size = data->size; } /* Write the data. */ result = MHD__asn1_write_value (c, root, val.data, val.size); if (val.data != data->data) MHD__gnutls_free_datum (&val); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); return MHD_gtls_asn2err (result); } return 0; cleanup:if (val.data != data->data) MHD__gnutls_free_datum (&val); return result; } /* Encodes and copies the private key parameters into a * subjectPublicKeyInfo structure. * */ int MHD__gnutls_x509_encode_and_copy_PKI_params (ASN1_TYPE dst, const char *dst_name, enum MHD_GNUTLS_PublicKeyAlgorithm pk_algorithm, mpi_t * params, int params_size) { const char *pk; MHD_gnutls_datum_t der = { NULL, 0 }; int result; char name[128]; pk = MHD_gtls_x509_pk_to_oid (pk_algorithm); if (pk == NULL) { MHD_gnutls_assert (); return GNUTLS_E_UNKNOWN_PK_ALGORITHM; } /* write the OID */ MHD_gtls_str_cpy (name, sizeof (name), dst_name); MHD_gtls_str_cat (name, sizeof (name), ".algorithm.algorithm"); result = MHD__asn1_write_value (dst, name, pk, 1); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); return MHD_gtls_asn2err (result); } if (pk_algorithm == MHD_GNUTLS_PK_RSA) { /* disable parameters, which are not used in RSA. */ MHD_gtls_str_cpy (name, sizeof (name), dst_name); MHD_gtls_str_cat (name, sizeof (name), ".algorithm.parameters"); result = MHD__asn1_write_value (dst, name, NULL, 0); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); return MHD_gtls_asn2err (result); } result = MHD__gnutls_x509_write_rsa_params (params, params_size, &der); if (result < 0) { MHD_gnutls_assert (); return result; } /* Write the DER parameters. (in bits) */ MHD_gtls_str_cpy (name, sizeof (name), dst_name); MHD_gtls_str_cat (name, sizeof (name), ".subjectPublicKey"); result = MHD__asn1_write_value (dst, name, der.data, der.size * 8); MHD__gnutls_free_datum (&der); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); return MHD_gtls_asn2err (result); } } else return GNUTLS_E_UNIMPLEMENTED_FEATURE; return 0; } /* Reads and returns the PK algorithm of the given certificate-like * ASN.1 structure. src_name should be something like "tbsCertificate.subjectPublicKeyInfo". */ int MHD__gnutls_x509_get_pk_algorithm (ASN1_TYPE src, const char *src_name, unsigned int *bits) { int result; opaque *str = NULL; int algo; char oid[64]; int len; mpi_t params[MAX_PUBLIC_PARAMS_SIZE]; char name[128]; MHD_gtls_str_cpy (name, sizeof (name), src_name); MHD_gtls_str_cat (name, sizeof (name), ".algorithm.algorithm"); len = sizeof (oid); result = MHD__asn1_read_value (src, name, oid, &len); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); return MHD_gtls_asn2err (result); } algo = MHD_gtls_x509_oid2pk_algorithm (oid); if (bits == NULL) { MHD_gnutls_free (str); return algo; } /* Now read the parameters' bits */ MHD_gtls_str_cpy (name, sizeof (name), src_name); MHD_gtls_str_cat (name, sizeof (name), ".subjectPublicKey"); len = 0; result = MHD__asn1_read_value (src, name, NULL, &len); if (result != ASN1_MEM_ERROR) { MHD_gnutls_assert (); return MHD_gtls_asn2err (result); } if (len % 8 != 0) { MHD_gnutls_assert (); return GNUTLS_E_CERTIFICATE_ERROR; } len /= 8; str = MHD_gnutls_malloc (len); if (str == NULL) { MHD_gnutls_assert (); return GNUTLS_E_MEMORY_ERROR; } MHD_gtls_str_cpy (name, sizeof (name), src_name); MHD_gtls_str_cat (name, sizeof (name), ".subjectPublicKey"); result = MHD__asn1_read_value (src, name, str, &len); if (result != ASN1_SUCCESS) { MHD_gnutls_assert (); MHD_gnutls_free (str); return MHD_gtls_asn2err (result); } len /= 8; switch (algo) { case MHD_GNUTLS_PK_RSA: { if ((result = MHD__gnutls_x509_read_rsa_params (str, len, params)) < 0) { MHD_gnutls_assert (); return result; } bits[0] = MHD__gnutls_mpi_get_nbits (params[0]); MHD_gtls_mpi_release (¶ms[0]); MHD_gtls_mpi_release (¶ms[1]); } break; default: MHD__gnutls_x509_log ("MHD__gnutls_x509_get_pk_algorithm: unhandled algorithm %d\n", algo); } MHD_gnutls_free (str); return algo; } /* Reads the DER signed data from the certificate and allocates space and * returns them into signed_data. */ int MHD__gnutls_x509_get_signed_data (ASN1_TYPE src, const char *src_name, MHD_gnutls_datum_t * signed_data) { MHD_gnutls_datum_t der; int start, end, result; result = MHD__gnutls_x509_der_encode (src, "", &der, 0); if (result < 0) { MHD_gnutls_assert (); return result; } /* Get the signed data */ result = MHD__asn1_der_decoding_startEnd (src, der.data, der.size, src_name, &start, &end); if (result != ASN1_SUCCESS) { result = MHD_gtls_asn2err (result); MHD_gnutls_assert (); goto cleanup; } result = MHD__gnutls_set_datum (signed_data, &der.data[start], end - start + 1); if (result < 0) { MHD_gnutls_assert (); goto cleanup; } result = 0; cleanup:MHD__gnutls_free_datum (&der); return result; } /* Reads the DER signature from the certificate and allocates space and * returns them into signed_data. */ int MHD__gnutls_x509_get_signature (ASN1_TYPE src, const char *src_name, MHD_gnutls_datum_t * signature) { int bits, result, len; signature->data = NULL; signature->size = 0; /* Read the signature */ bits = 0; result = MHD__asn1_read_value (src, src_name, NULL, &bits); if (result != ASN1_MEM_ERROR) { result = MHD_gtls_asn2err (result); MHD_gnutls_assert (); goto cleanup; } if (bits % 8 != 0) { MHD_gnutls_assert (); result = GNUTLS_E_CERTIFICATE_ERROR; goto cleanup; } len = bits / 8; signature->data = MHD_gnutls_malloc (len); if (signature->data == NULL) { MHD_gnutls_assert (); result = GNUTLS_E_MEMORY_ERROR; return result; } /* read the bit string of the signature */ bits = len; result = MHD__asn1_read_value (src, src_name, signature->data, &bits); if (result != ASN1_SUCCESS) { result = MHD_gtls_asn2err (result); MHD_gnutls_assert (); goto cleanup; } signature->size = len; return 0; cleanup:return result; }