diff options
Diffstat (limited to 'source4/heimdal/lib/hx509/print.c')
| -rw-r--r-- | source4/heimdal/lib/hx509/print.c | 1037 |
1 files changed, 1037 insertions, 0 deletions
diff --git a/source4/heimdal/lib/hx509/print.c b/source4/heimdal/lib/hx509/print.c new file mode 100644 index 0000000000..92d7811909 --- /dev/null +++ b/source4/heimdal/lib/hx509/print.c @@ -0,0 +1,1037 @@ +/* + * Copyright (c) 2004 - 2007 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * 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. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS 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 INSTITUTE OR 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 "hx_locl.h" +RCSID("$Id$"); + +/** + * @page page_print Hx509 printing functions + * + * See the library functions here: @ref hx509_print + */ + +struct hx509_validate_ctx_data { + int flags; + hx509_vprint_func vprint_func; + void *ctx; +}; + +struct cert_status { + unsigned int selfsigned:1; + unsigned int isca:1; + unsigned int isproxy:1; + unsigned int haveSAN:1; + unsigned int haveIAN:1; + unsigned int haveSKI:1; + unsigned int haveAKI:1; + unsigned int haveCRLDP:1; +}; + + +/* + * + */ + +static int +Time2string(const Time *T, char **str) +{ + time_t t; + char *s; + struct tm *tm; + + *str = NULL; + t = _hx509_Time2time_t(T); + tm = gmtime (&t); + s = malloc(30); + if (s == NULL) + return ENOMEM; + strftime(s, 30, "%Y-%m-%d %H:%M:%S", tm); + *str = s; + return 0; +} + +/** + * Helper function to print on stdout for: + * - hx509_oid_print(), + * - hx509_bitstring_print(), + * - hx509_validate_ctx_set_print(). + * + * @param ctx the context to the print function. If the ctx is NULL, + * stdout is used. + * @param fmt the printing format. + * @param va the argumet list. + * + * @ingroup hx509_print + */ + +void +hx509_print_stdout(void *ctx, const char *fmt, va_list va) +{ + FILE *f = ctx; + if (f == NULL) + f = stdout; + vfprintf(f, fmt, va); +} + +static void +print_func(hx509_vprint_func func, void *ctx, const char *fmt, ...) +{ + va_list va; + va_start(va, fmt); + (*func)(ctx, fmt, va); + va_end(va); +} + +/** + * Print a oid to a string. + * + * @param oid oid to print + * @param str allocated string, free with hx509_xfree(). + * + * @return An hx509 error code, see hx509_get_error_string(). + * + * @ingroup hx509_print + */ + +int +hx509_oid_sprint(const heim_oid *oid, char **str) +{ + return der_print_heim_oid(oid, '.', str); +} + +/** + * Print a oid using a hx509_vprint_func function. To print to stdout + * use hx509_print_stdout(). + * + * @param oid oid to print + * @param func hx509_vprint_func to print with. + * @param ctx context variable to hx509_vprint_func function. + * + * @ingroup hx509_print + */ + +void +hx509_oid_print(const heim_oid *oid, hx509_vprint_func func, void *ctx) +{ + char *str; + hx509_oid_sprint(oid, &str); + print_func(func, ctx, "%s", str); + free(str); +} + +/** + * Print a bitstring using a hx509_vprint_func function. To print to + * stdout use hx509_print_stdout(). + * + * @param b bit string to print. + * @param func hx509_vprint_func to print with. + * @param ctx context variable to hx509_vprint_func function. + * + * @ingroup hx509_print + */ + +void +hx509_bitstring_print(const heim_bit_string *b, + hx509_vprint_func func, void *ctx) +{ + int i; + print_func(func, ctx, "\tlength: %d\n\t", b->length); + for (i = 0; i < (b->length + 7) / 8; i++) + print_func(func, ctx, "%02x%s%s", + ((unsigned char *)b->data)[i], + i < (b->length - 7) / 8 + && (i == 0 || (i % 16) != 15) ? ":" : "", + i != 0 && (i % 16) == 15 ? + (i <= ((b->length + 7) / 8 - 2) ? "\n\t" : "\n"):""); +} + +/** + * Print certificate usage for a certificate to a string. + * + * @param context A hx509 context. + * @param c a certificate print the keyusage for. + * @param s the return string with the keysage printed in to, free + * with hx509_xfree(). + * + * @return An hx509 error code, see hx509_get_error_string(). + * + * @ingroup hx509_print + */ + +int +hx509_cert_keyusage_print(hx509_context context, hx509_cert c, char **s) +{ + KeyUsage ku; + char buf[256]; + int ret; + + *s = NULL; + + ret = _hx509_cert_get_keyusage(context, c, &ku); + if (ret) + return ret; + unparse_flags(KeyUsage2int(ku), asn1_KeyUsage_units(), buf, sizeof(buf)); + *s = strdup(buf); + if (*s == NULL) { + hx509_set_error_string(context, 0, ENOMEM, "out of memory"); + return ENOMEM; + } + + return 0; +} + +/* + * + */ + +static void +validate_vprint(void *c, const char *fmt, va_list va) +{ + hx509_validate_ctx ctx = c; + if (ctx->vprint_func == NULL) + return; + (ctx->vprint_func)(ctx->ctx, fmt, va); +} + +static void +validate_print(hx509_validate_ctx ctx, int flags, const char *fmt, ...) +{ + va_list va; + if ((ctx->flags & flags) == 0) + return; + va_start(va, fmt); + validate_vprint(ctx, fmt, va); + va_end(va); +} + +/* + * Dont Care, SHOULD critical, SHOULD NOT critical, MUST critical, + * MUST NOT critical + */ +enum critical_flag { D_C = 0, S_C, S_N_C, M_C, M_N_C }; + +static int +check_Null(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, const Extension *e) +{ + switch(cf) { + case D_C: + break; + case S_C: + if (!e->critical) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "\tCritical not set on SHOULD\n"); + break; + case S_N_C: + if (e->critical) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "\tCritical set on SHOULD NOT\n"); + break; + case M_C: + if (!e->critical) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "\tCritical not set on MUST\n"); + break; + case M_N_C: + if (e->critical) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "\tCritical set on MUST NOT\n"); + break; + default: + _hx509_abort("internal check_Null state error"); + } + return 0; +} + +static int +check_subjectKeyIdentifier(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *e) +{ + SubjectKeyIdentifier si; + size_t size; + int ret; + + status->haveSKI = 1; + check_Null(ctx, status, cf, e); + + ret = decode_SubjectKeyIdentifier(e->extnValue.data, + e->extnValue.length, + &si, &size); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Decoding SubjectKeyIdentifier failed: %d", ret); + return 1; + } + if (size != e->extnValue.length) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Decoding SKI ahve extra bits on the end"); + return 1; + } + if (si.length == 0) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "SKI is too short (0 bytes)"); + if (si.length > 20) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "SKI is too long"); + + { + char *id; + hex_encode(si.data, si.length, &id); + if (id) { + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "\tsubject key id: %s\n", id); + free(id); + } + } + + free_SubjectKeyIdentifier(&si); + + return 0; +} + +static int +check_authorityKeyIdentifier(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *e) +{ + AuthorityKeyIdentifier ai; + size_t size; + int ret; + + status->haveAKI = 1; + check_Null(ctx, status, cf, e); + + ret = decode_AuthorityKeyIdentifier(e->extnValue.data, + e->extnValue.length, + &ai, &size); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Decoding AuthorityKeyIdentifier failed: %d", ret); + return 1; + } + if (size != e->extnValue.length) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Decoding SKI ahve extra bits on the end"); + return 1; + } + + if (ai.keyIdentifier) { + char *id; + hex_encode(ai.keyIdentifier->data, ai.keyIdentifier->length, &id); + if (id) { + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "\tauthority key id: %s\n", id); + free(id); + } + } + + return 0; +} + +static int +check_extKeyUsage(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *e) +{ + ExtKeyUsage eku; + size_t size, i; + int ret; + + check_Null(ctx, status, cf, e); + + ret = decode_ExtKeyUsage(e->extnValue.data, + e->extnValue.length, + &eku, &size); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Decoding ExtKeyUsage failed: %d", ret); + return 1; + } + if (size != e->extnValue.length) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Padding data in EKU"); + free_ExtKeyUsage(&eku); + return 1; + } + if (eku.len == 0) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "ExtKeyUsage length is 0"); + return 1; + } + + for (i = 0; i < eku.len; i++) { + char *str; + ret = der_print_heim_oid (&eku.val[i], '.', &str); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "\tEKU: failed to print oid %d", i); + free_ExtKeyUsage(&eku); + return 1; + } + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "\teku-%d: %s\n", i, str);; + free(str); + } + + free_ExtKeyUsage(&eku); + + return 0; +} + +static int +check_pkinit_san(hx509_validate_ctx ctx, heim_any *a) +{ + KRB5PrincipalName kn; + unsigned i; + size_t size; + int ret; + + ret = decode_KRB5PrincipalName(a->data, a->length, &kn, &size); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Decoding kerberos name in SAN failed: %d", ret); + return 1; + } + + if (size != a->length) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Decoding kerberos name have extra bits on the end"); + return 1; + } + + /* print kerberos principal, add code to quote / within components */ + for (i = 0; i < kn.principalName.name_string.len; i++) { + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "%s", + kn.principalName.name_string.val[i]); + if (i + 1 < kn.principalName.name_string.len) + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "/"); + } + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "@"); + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "%s", kn.realm); + + free_KRB5PrincipalName(&kn); + return 0; +} + +static int +check_utf8_string_san(hx509_validate_ctx ctx, heim_any *a) +{ + PKIXXmppAddr jid; + size_t size; + int ret; + + ret = decode_PKIXXmppAddr(a->data, a->length, &jid, &size); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Decoding JID in SAN failed: %d", ret); + return 1; + } + + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "%s", jid); + free_PKIXXmppAddr(&jid); + + return 0; +} + +static int +check_altnull(hx509_validate_ctx ctx, heim_any *a) +{ + return 0; +} + +static int +check_CRLDistributionPoints(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *e) +{ + CRLDistributionPoints dp; + size_t size; + int ret, i; + + check_Null(ctx, status, cf, e); + + ret = decode_CRLDistributionPoints(e->extnValue.data, + e->extnValue.length, + &dp, &size); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Decoding CRL Distribution Points failed: %d\n", ret); + return 1; + } + + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "CRL Distribution Points:\n"); + for (i = 0 ; i < dp.len; i++) { + if (dp.val[i].distributionPoint) { + DistributionPointName dpname; + heim_any *data = dp.val[i].distributionPoint; + int j; + + ret = decode_DistributionPointName(data->data, data->length, + &dpname, NULL); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Failed to parse CRL Distribution Point Name: %d\n", ret); + continue; + } + + switch (dpname.element) { + case choice_DistributionPointName_fullName: + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "Fullname:\n"); + + for (j = 0 ; j < dpname.u.fullName.len; j++) { + char *s; + GeneralName *name = &dpname.u.fullName.val[j]; + + ret = hx509_general_name_unparse(name, &s); + if (ret == 0 && s != NULL) { + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, " %s\n", s); + free(s); + } + } + break; + case choice_DistributionPointName_nameRelativeToCRLIssuer: + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "Unknown nameRelativeToCRLIssuer"); + break; + default: + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Unknown DistributionPointName"); + break; + } + free_DistributionPointName(&dpname); + } + } + free_CRLDistributionPoints(&dp); + + status->haveCRLDP = 1; + + return 0; +} + + +struct { + const char *name; + const heim_oid *(*oid)(void); + int (*func)(hx509_validate_ctx, heim_any *); +} check_altname[] = { + { "pk-init", oid_id_pkinit_san, check_pkinit_san }, + { "jabber", oid_id_pkix_on_xmppAddr, check_utf8_string_san }, + { "dns-srv", oid_id_pkix_on_dnsSRV, check_altnull }, + { "card-id", oid_id_uspkicommon_card_id, check_altnull }, + { "Microsoft NT-PRINCIPAL-NAME", oid_id_pkinit_ms_san, check_utf8_string_san } +}; + +static int +check_altName(hx509_validate_ctx ctx, + struct cert_status *status, + const char *name, + enum critical_flag cf, + const Extension *e) +{ + GeneralNames gn; + size_t size; + int ret, i; + + check_Null(ctx, status, cf, e); + + if (e->extnValue.length == 0) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "%sAltName empty, not allowed", name); + return 1; + } + ret = decode_GeneralNames(e->extnValue.data, e->extnValue.length, + &gn, &size); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "\tret = %d while decoding %s GeneralNames\n", + ret, name); + return 1; + } + if (gn.len == 0) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "%sAltName generalName empty, not allowed\n", name); + return 1; + } + + for (i = 0; i < gn.len; i++) { + switch (gn.val[i].element) { + case choice_GeneralName_otherName: { + unsigned j; + + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "%sAltName otherName ", name); + + for (j = 0; j < sizeof(check_altname)/sizeof(check_altname[0]); j++) { + if (der_heim_oid_cmp((*check_altname[j].oid)(), + &gn.val[i].u.otherName.type_id) != 0) + continue; + + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "%s: ", + check_altname[j].name); + (*check_altname[j].func)(ctx, &gn.val[i].u.otherName.value); + break; + } + if (j == sizeof(check_altname)/sizeof(check_altname[0])) { + hx509_oid_print(&gn.val[i].u.otherName.type_id, + validate_vprint, ctx); + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, " unknown"); + } + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "\n"); + break; + } + default: { + char *s; + ret = hx509_general_name_unparse(&gn.val[i], &s); + if (ret) { + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "ret = %d unparsing GeneralName\n", ret); + return 1; + } + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "%s\n", s); + free(s); + break; + } + } + } + + free_GeneralNames(&gn); + + return 0; +} + +static int +check_subjectAltName(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *e) +{ + status->haveSAN = 1; + return check_altName(ctx, status, "subject", cf, e); +} + +static int +check_issuerAltName(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *e) +{ + status->haveIAN = 1; + return check_altName(ctx, status, "issuer", cf, e); +} + + +static int +check_basicConstraints(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *e) +{ + BasicConstraints b; + size_t size; + int ret; + + check_Null(ctx, status, cf, e); + + ret = decode_BasicConstraints(e->extnValue.data, e->extnValue.length, + &b, &size); + if (ret) { + printf("\tret = %d while decoding BasicConstraints\n", ret); + return 0; + } + if (size != e->extnValue.length) + printf("\tlength of der data isn't same as extension\n"); + + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "\tis %sa CA\n", b.cA && *b.cA ? "" : "NOT "); + if (b.pathLenConstraint) + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "\tpathLenConstraint: %d\n", *b.pathLenConstraint); + + if (b.cA) { + if (*b.cA) { + if (!e->critical) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Is a CA and not BasicConstraints CRITICAL\n"); + status->isca = 1; + } + else + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "cA is FALSE, not allowed to be\n"); + } + free_BasicConstraints(&b); + + return 0; +} + +static int +check_proxyCertInfo(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *e) +{ + check_Null(ctx, status, cf, e); + status->isproxy = 1; + return 0; +} + +static int +check_authorityInfoAccess(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *e) +{ + AuthorityInfoAccessSyntax aia; + size_t size; + int ret, i; + + check_Null(ctx, status, cf, e); + + ret = decode_AuthorityInfoAccessSyntax(e->extnValue.data, + e->extnValue.length, + &aia, &size); + if (ret) { + printf("\tret = %d while decoding AuthorityInfoAccessSyntax\n", ret); + return 0; + } + + for (i = 0; i < aia.len; i++) { + char *str; + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "\ttype: "); + hx509_oid_print(&aia.val[i].accessMethod, validate_vprint, ctx); + hx509_general_name_unparse(&aia.val[i].accessLocation, &str); + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "\n\tdirname: %s\n", str); + free(str); + } + free_AuthorityInfoAccessSyntax(&aia); + + return 0; +} + +/* + * + */ + +struct { + const char *name; + const heim_oid *(*oid)(void); + int (*func)(hx509_validate_ctx ctx, + struct cert_status *status, + enum critical_flag cf, + const Extension *); + enum critical_flag cf; +} check_extension[] = { +#define ext(name, checkname) #name, &oid_id_x509_ce_##name, check_##checkname + { ext(subjectDirectoryAttributes, Null), M_N_C }, + { ext(subjectKeyIdentifier, subjectKeyIdentifier), M_N_C }, + { ext(keyUsage, Null), S_C }, + { ext(subjectAltName, subjectAltName), M_N_C }, + { ext(issuerAltName, issuerAltName), S_N_C }, + { ext(basicConstraints, basicConstraints), D_C }, + { ext(cRLNumber, Null), M_N_C }, + { ext(cRLReason, Null), M_N_C }, + { ext(holdInstructionCode, Null), M_N_C }, + { ext(invalidityDate, Null), M_N_C }, + { ext(deltaCRLIndicator, Null), M_C }, + { ext(issuingDistributionPoint, Null), M_C }, + { ext(certificateIssuer, Null), M_C }, + { ext(nameConstraints, Null), M_C }, + { ext(cRLDistributionPoints, CRLDistributionPoints), S_N_C }, + { ext(certificatePolicies, Null) }, + { ext(policyMappings, Null), M_N_C }, + { ext(authorityKeyIdentifier, authorityKeyIdentifier), M_N_C }, + { ext(policyConstraints, Null), D_C }, + { ext(extKeyUsage, extKeyUsage), D_C }, + { ext(freshestCRL, Null), M_N_C }, + { ext(inhibitAnyPolicy, Null), M_C }, +#undef ext +#define ext(name, checkname) #name, &oid_id_pkix_pe_##name, check_##checkname + { ext(proxyCertInfo, proxyCertInfo), M_C }, + { ext(authorityInfoAccess, authorityInfoAccess), M_C }, +#undef ext + { "US Fed PKI - PIV Interim", oid_id_uspkicommon_piv_interim, + check_Null, D_C }, + { "Netscape cert comment", oid_id_netscape_cert_comment, + check_Null, D_C }, + { NULL } +}; + +/** + * Allocate a hx509 validation/printing context. + * + * @param context A hx509 context. + * @param ctx a new allocated hx509 validation context, free with + * hx509_validate_ctx_free(). + + * @return An hx509 error code, see hx509_get_error_string(). + * + * @ingroup hx509_print + */ + +int +hx509_validate_ctx_init(hx509_context context, hx509_validate_ctx *ctx) +{ + *ctx = malloc(sizeof(**ctx)); + if (*ctx == NULL) + return ENOMEM; + memset(*ctx, 0, sizeof(**ctx)); + return 0; +} + +/** + * Set the printing functions for the validation context. + * + * @param ctx a hx509 valication context. + * @param func the printing function to usea. + * @param c the context variable to the printing function. + * + * @return An hx509 error code, see hx509_get_error_string(). + * + * @ingroup hx509_print + */ + +void +hx509_validate_ctx_set_print(hx509_validate_ctx ctx, + hx509_vprint_func func, + void *c) +{ + ctx->vprint_func = func; + ctx->ctx = c; +} + +/** + * Add flags to control the behaivor of the hx509_validate_cert() + * function. + * + * @param ctx A hx509 validation context. + * @param flags flags to add to the validation context. + * + * @return An hx509 error code, see hx509_get_error_string(). + * + * @ingroup hx509_print + */ + +void +hx509_validate_ctx_add_flags(hx509_validate_ctx ctx, int flags) +{ + ctx->flags |= flags; +} + +/** + * Free an hx509 validate context. + * + * @param ctx the hx509 validate context to free. + * + * @ingroup hx509_print + */ + +void +hx509_validate_ctx_free(hx509_validate_ctx ctx) +{ + free(ctx); +} + +/** + * Validate/Print the status of the certificate. + * + * @param context A hx509 context. + * @param ctx A hx509 validation context. + * @param cert the cerificate to validate/print. + + * @return An hx509 error code, see hx509_get_error_string(). + * + * @ingroup hx509_print + */ + +int +hx509_validate_cert(hx509_context context, + hx509_validate_ctx ctx, + hx509_cert cert) +{ + Certificate *c = _hx509_get_cert(cert); + TBSCertificate *t = &c->tbsCertificate; + hx509_name issuer, subject; + char *str; + struct cert_status status; + int ret; + + memset(&status, 0, sizeof(status)); + + if (_hx509_cert_get_version(c) != 3) + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "Not version 3 certificate\n"); + + if ((t->version == NULL || *t->version < 2) && t->extensions) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Not version 3 certificate with extensions\n"); + + if (_hx509_cert_get_version(c) >= 3 && t->extensions == NULL) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Version 3 certificate without extensions\n"); + + ret = hx509_cert_get_subject(cert, &subject); + if (ret) abort(); + hx509_name_to_string(subject, &str); + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "subject name: %s\n", str); + free(str); + + ret = hx509_cert_get_issuer(cert, &issuer); + if (ret) abort(); + hx509_name_to_string(issuer, &str); + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "issuer name: %s\n", str); + free(str); + + if (hx509_name_cmp(subject, issuer) == 0) { + status.selfsigned = 1; + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "\tis a self-signed certificate\n"); + } + + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "Validity:\n"); + + Time2string(&t->validity.notBefore, &str); + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "\tnotBefore %s\n", str); + free(str); + Time2string(&t->validity.notAfter, &str); + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "\tnotAfter %s\n", str); + free(str); + + if (t->extensions) { + int i, j; + + if (t->extensions->len == 0) { + validate_print(ctx, + HX509_VALIDATE_F_VALIDATE|HX509_VALIDATE_F_VERBOSE, + "The empty extensions list is not " + "allowed by PKIX\n"); + } + + for (i = 0; i < t->extensions->len; i++) { + + for (j = 0; check_extension[j].name; j++) + if (der_heim_oid_cmp((*check_extension[j].oid)(), + &t->extensions->val[i].extnID) == 0) + break; + if (check_extension[j].name == NULL) { + int flags = HX509_VALIDATE_F_VERBOSE; + if (t->extensions->val[i].critical) + flags |= HX509_VALIDATE_F_VALIDATE; + validate_print(ctx, flags, "don't know what "); + if (t->extensions->val[i].critical) + validate_print(ctx, flags, "and is CRITICAL "); + if (ctx->flags & flags) + hx509_oid_print(&t->extensions->val[i].extnID, + validate_vprint, ctx); + validate_print(ctx, flags, " is\n"); + continue; + } + validate_print(ctx, + HX509_VALIDATE_F_VALIDATE|HX509_VALIDATE_F_VERBOSE, + "checking extention: %s\n", + check_extension[j].name); + (*check_extension[j].func)(ctx, + &status, + check_extension[j].cf, + &t->extensions->val[i]); + } + } else + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, "no extentions\n"); + + if (status.isca) { + if (!status.haveSKI) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "CA certificate have no SubjectKeyIdentifier\n"); + + } else { + if (!status.haveAKI) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Is not CA and doesn't have " + "AuthorityKeyIdentifier\n"); + } + + + if (!status.haveSKI) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Doesn't have SubjectKeyIdentifier\n"); + + if (status.isproxy && status.isca) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Proxy and CA at the same time!\n"); + + if (status.isproxy) { + if (status.haveSAN) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Proxy and have SAN\n"); + if (status.haveIAN) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Proxy and have IAN\n"); + } + + if (hx509_name_is_null_p(subject) && !status.haveSAN) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "NULL subject DN and doesn't have a SAN\n"); + + if (!status.selfsigned && !status.haveCRLDP) + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Not a CA nor PROXY and doesn't have" + "CRL Dist Point\n"); + + if (status.selfsigned) { + ret = _hx509_verify_signature_bitstring(context, + c, + &c->signatureAlgorithm, + &c->tbsCertificate._save, + &c->signatureValue); + if (ret == 0) + validate_print(ctx, HX509_VALIDATE_F_VERBOSE, + "Self-signed certificate was self-signed\n"); + else + validate_print(ctx, HX509_VALIDATE_F_VALIDATE, + "Self-signed certificate NOT really self-signed!\n"); + } + + hx509_name_free(&subject); + hx509_name_free(&issuer); + + return 0; +} |