Merge pull request #8025 from AgathiyanB/accept-numericoid-hexstring-x509

Accept numericoid hexstring x509

ChangeLog.d/extend-distinguished-names.txt

@@ -0,0 +1,3 @@
+Features
+   * Accept arbitrary AttributeType and AttributeValue in certificate
+     Distinguished Names using RFC 4514 syntax.

include/mbedtls/asn1.h

@@ -97,14 +97,13 @@
 /* Slightly smaller way to check if tag is a string tag
  * compared to canonical implementation. */
 #define MBEDTLS_ASN1_IS_STRING_TAG(tag)                                \
-    ((tag) < 32u && (                                                      \
+    ((unsigned int) (tag) < 32u && (                                   \
          ((1u << (tag)) & ((1u << MBEDTLS_ASN1_BMP_STRING)       |     \
                            (1u << MBEDTLS_ASN1_UTF8_STRING)      |     \
                            (1u << MBEDTLS_ASN1_T61_STRING)       |     \
                            (1u << MBEDTLS_ASN1_IA5_STRING)       |     \
                            (1u << MBEDTLS_ASN1_UNIVERSAL_STRING) |     \
-                           (1u << MBEDTLS_ASN1_PRINTABLE_STRING) |     \
+                           (1u << MBEDTLS_ASN1_PRINTABLE_STRING))) != 0))
-                           (1u << MBEDTLS_ASN1_BIT_STRING))) != 0))
 
 /*
  * Bit masks for each of the components of an ASN.1 tag as specified in
@@ -210,6 +209,7 @@ typedef struct mbedtls_asn1_named_data {
 }
 mbedtls_asn1_named_data;
 
+#if defined(MBEDTLS_ASN1_PARSE_C) || defined(MBEDTLS_X509_CREATE_C)
 /**
  * \brief       Get the length of an ASN.1 element.
  *              Updates the pointer to immediately behind the length.
@@ -256,7 +256,9 @@ int mbedtls_asn1_get_len(unsigned char **p,
 int mbedtls_asn1_get_tag(unsigned char **p,
                          const unsigned char *end,
                          size_t *len, int tag);
+#endif /* MBEDTLS_ASN1_PARSE_C || MBEDTLS_X509_CREATE_C */
 
+#if defined(MBEDTLS_ASN1_PARSE_C)
 /**
  * \brief       Retrieve a boolean ASN.1 tag and its value.
  *              Updates the pointer to immediately behind the full tag.
@@ -646,4 +648,6 @@ void mbedtls_asn1_free_named_data_list_shallow(mbedtls_asn1_named_data *name);
 }
 #endif
 
+#endif /* MBEDTLS_ASN1_PARSE_C */
+
 #endif /* asn1.h */

include/mbedtls/asn1write.h

@@ -48,6 +48,7 @@
 extern "C" {
 #endif
 
+#if defined(MBEDTLS_ASN1_WRITE_C) || defined(MBEDTLS_X509_USE_C)
 /**
  * \brief           Write a length field in ASN.1 format.
  *
@@ -76,7 +77,9 @@ int mbedtls_asn1_write_len(unsigned char **p, const unsigned char *start,
  */
 int mbedtls_asn1_write_tag(unsigned char **p, const unsigned char *start,
                            unsigned char tag);
+#endif /* MBEDTLS_ASN1_WRITE_C || MBEDTLS_X509_USE_C */
 
+#if defined(MBEDTLS_ASN1_WRITE_C)
 /**
  * \brief           Write raw buffer data.
  *
@@ -393,4 +396,6 @@ mbedtls_asn1_named_data *mbedtls_asn1_store_named_data(mbedtls_asn1_named_data *
 }
 #endif
 
+#endif /* MBEDTLS_ASN1_WRITE_C */
+
 #endif /* MBEDTLS_ASN1_WRITE_H */

library/asn1parse.c

@@ -19,7 +19,7 @@
 
 #include "common.h"
 
-#if defined(MBEDTLS_ASN1_PARSE_C)
+#if defined(MBEDTLS_ASN1_PARSE_C) || defined(MBEDTLS_X509_CREATE_C)
 
 #include "mbedtls/asn1.h"
 #include "mbedtls/platform_util.h"
@@ -114,7 +114,9 @@ int mbedtls_asn1_get_tag(unsigned char **p,
 
     return mbedtls_asn1_get_len(p, end, len);
 }
+#endif /* MBEDTLS_ASN1_PARSE_C || MBEDTLS_X509_CREATE_C */
 
+#if defined(MBEDTLS_ASN1_PARSE_C)
 int mbedtls_asn1_get_bool(unsigned char **p,
                           const unsigned char *end,
                           int *val)

library/asn1write.c

@@ -19,7 +19,7 @@
 
 #include "common.h"
 
-#if defined(MBEDTLS_ASN1_WRITE_C)
+#if defined(MBEDTLS_ASN1_WRITE_C) || defined(MBEDTLS_X509_USE_C)
 
 #include "mbedtls/asn1write.h"
 #include "mbedtls/error.h"
@@ -102,7 +102,9 @@ int mbedtls_asn1_write_tag(unsigned char **p, const unsigned char *start, unsign
 
     return 1;
 }
+#endif /* MBEDTLS_ASN1_WRITE_C || MBEDTLS_X509_USE_C */
 
+#if defined(MBEDTLS_ASN1_WRITE_C)
 int mbedtls_asn1_write_raw_buffer(unsigned char **p, const unsigned char *start,
                                   const unsigned char *buf, size_t size)
 {

library/x509.c

@@ -43,6 +43,8 @@
 #include "mbedtls/pem.h"
 #endif
 
+#include "mbedtls/asn1write.h"
+
 #include "mbedtls/platform.h"
 
 #if defined(MBEDTLS_HAVE_TIME)
@@ -810,6 +812,11 @@ int mbedtls_x509_get_ext(unsigned char **p, const unsigned char *end,
     return 0;
 }
 
+static char nibble_to_hex_digit(int i)
+{
+    return (i < 10) ? (i + '0') : (i - 10 + 'A');
+}
+
 /*
  * Store the name in printable form into buf; no more
  * than size characters will be written
@@ -817,11 +824,16 @@ int mbedtls_x509_get_ext(unsigned char **p, const unsigned char *end,
 int mbedtls_x509_dn_gets(char *buf, size_t size, const mbedtls_x509_name *dn)
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    size_t i, j, n;
+    size_t i, j, n, asn1_len_size, asn1_tag_size, asn1_tag_len_buf_start;
+    /* 6 is enough as our asn1 write functions only write one byte for the tag and at most five bytes for the length*/
+    unsigned char asn1_tag_len_buf[6];
+    unsigned char *asn1_len_p;
     unsigned char c, merge = 0;
     const mbedtls_x509_name *name;
     const char *short_name = NULL;
+    char lowbits, highbits;
     char s[MBEDTLS_X509_MAX_DN_NAME_SIZE], *p;
+    int print_hexstring;
 
     memset(s, 0, sizeof(s));
 
@@ -840,34 +852,93 @@ int mbedtls_x509_dn_gets(char *buf, size_t size, const mbedtls_x509_name *dn)
             MBEDTLS_X509_SAFE_SNPRINTF;
         }
 
-        ret = mbedtls_oid_get_attr_short_name(&name->oid, &short_name);
+        print_hexstring = (name->val.tag != MBEDTLS_ASN1_UTF8_STRING) &&
+                          (name->val.tag != MBEDTLS_ASN1_PRINTABLE_STRING) &&
+                          (name->val.tag != MBEDTLS_ASN1_IA5_STRING);
 
-        if (ret == 0) {
+        if ((ret = mbedtls_oid_get_attr_short_name(&name->oid, &short_name)) == 0) {
             ret = mbedtls_snprintf(p, n, "%s=", short_name);
+        } else {
+            if ((ret = mbedtls_oid_get_numeric_string(p, n, &name->oid)) > 0) {
+                n -= ret;
+                p += ret;
+                ret = mbedtls_snprintf(p, n, "=");
+                print_hexstring = 1;
+            } else if (ret == MBEDTLS_ERR_OID_BUF_TOO_SMALL) {
+                return MBEDTLS_ERR_X509_BUFFER_TOO_SMALL;
             } else {
                 ret = mbedtls_snprintf(p, n, "\?\?=");
             }
+        }
         MBEDTLS_X509_SAFE_SNPRINTF;
 
+        if (print_hexstring) {
+            s[0] = '#';
+
+            asn1_len_p = asn1_tag_len_buf + sizeof(asn1_tag_len_buf);
+            if ((ret = mbedtls_asn1_write_len(&asn1_len_p, asn1_tag_len_buf, name->val.len)) < 0) {
+                return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+            }
+            asn1_len_size = ret;
+            if ((ret = mbedtls_asn1_write_tag(&asn1_len_p, asn1_tag_len_buf, name->val.tag)) < 0) {
+                return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+            }
+            asn1_tag_size = ret;
+            asn1_tag_len_buf_start = sizeof(asn1_tag_len_buf) - asn1_len_size - asn1_tag_size;
+            for (i = 0, j = 1; i < asn1_len_size + asn1_tag_size; i++) {
+                if (j + 1 >= sizeof(s) - 1) {
+                    return MBEDTLS_ERR_X509_BUFFER_TOO_SMALL;
+                }
+                c = asn1_tag_len_buf[asn1_tag_len_buf_start+i];
+                lowbits = (c & 0x0F);
+                highbits = c >> 4;
+                s[j++] = nibble_to_hex_digit(highbits);
+                s[j++] = nibble_to_hex_digit(lowbits);
+            }
+            for (i = 0; i < name->val.len; i++) {
+                if (j + 1 >= sizeof(s) - 1) {
+                    return MBEDTLS_ERR_X509_BUFFER_TOO_SMALL;
+                }
+                c = name->val.p[i];
+                lowbits = (c & 0x0F);
+                highbits = c >> 4;
+                s[j++] = nibble_to_hex_digit(highbits);
+                s[j++] = nibble_to_hex_digit(lowbits);
+            }
+        } else {
             for (i = 0, j = 0; i < name->val.len; i++, j++) {
                 if (j >= sizeof(s) - 1) {
                     return MBEDTLS_ERR_X509_BUFFER_TOO_SMALL;
                 }
 
                 c = name->val.p[i];
-            // Special characters requiring escaping, RFC 1779
+                // Special characters requiring escaping, RFC 4514 Section 2.4
-            if (c && strchr(",=+<>#;\"\\", c)) {
+                if (c == '\0') {
+                    return MBEDTLS_ERR_X509_INVALID_NAME;
+                } else {
+                    if (strchr(",=+<>;\"\\", c) ||
+                        ((i == 0) && strchr("# ", c)) ||
+                        ((i == name->val.len-1) && (c == ' '))) {
                         if (j + 1 >= sizeof(s) - 1) {
                             return MBEDTLS_ERR_X509_BUFFER_TOO_SMALL;
                         }
                         s[j++] = '\\';
                     }
+                }
                 if (c < 32 || c >= 127) {
-                s[j] = '?';
+                    if (j + 3 >= sizeof(s) - 1) {
+                        return MBEDTLS_ERR_X509_BUFFER_TOO_SMALL;
+                    }
+                    s[j++] = '\\';
+                    lowbits = (c & 0x0F);
+                    highbits = c >> 4;
+                    s[j++] = nibble_to_hex_digit(highbits);
+                    s[j] = nibble_to_hex_digit(lowbits);
                 } else {
                     s[j] = c;
                 }
             }
+        }
         s[j] = '\0';
         ret = mbedtls_snprintf(p, n, "%s", s);
         MBEDTLS_X509_SAFE_SNPRINTF;

library/x509_create.c

@@ -28,6 +28,10 @@
 
 #include <string.h>
 
+#include "mbedtls/platform.h"
+
+#include "mbedtls/asn1.h"
+
 /* Structure linking OIDs for X.509 DN AttributeTypes to their
  * string representations and default string encodings used by Mbed TLS. */
 typedef struct {
@@ -35,7 +39,8 @@ typedef struct {
                        * "CN" or "emailAddress". */
     size_t name_len; /* Length of 'name', without trailing 0 byte. */
     const char *oid; /* String representation of OID of AttributeType,
-                      * as per RFC 5280, Appendix A.1. */
+                      * as per RFC 5280, Appendix A.1. encoded as per
+                      * X.690 */
     int default_tag; /* The default character encoding used for the
                       * given attribute type, e.g.
                       * MBEDTLS_ASN1_UTF8_STRING for UTF-8. */
@@ -123,79 +128,200 @@ static const x509_attr_descriptor_t *x509_attr_descr_from_name(const char *name,
     return cur;
 }
 
+static int hex_to_int(char c)
+{
+    return ('0' <= c && c <= '9') ? (c - '0') :
+           ('a' <= c && c <= 'f') ? (c - 'a' + 10) :
+           ('A' <= c && c <= 'F') ? (c - 'A' + 10) : -1;
+}
+
+static int hexpair_to_int(const char *hexpair)
+{
+    int n1 = hex_to_int(*hexpair);
+    int n2 = hex_to_int(*(hexpair + 1));
+
+    if (n1 != -1 && n2 != -1) {
+        return (n1 << 4) | n2;
+    } else {
+        return -1;
+    }
+}
+
+static int parse_attribute_value_string(const char *s,
+                                        int len,
+                                        unsigned char *data,
+                                        size_t *data_len)
+{
+    const char *c;
+    const char *end = s + len;
+    unsigned char *d = data;
+    int n;
+
+    for (c = s; c < end; c++) {
+        if (*c == '\\') {
+            c++;
+
+            /* Check for valid escaped characters as per RFC 4514 Section 3 */
+            if (c + 1 < end && (n = hexpair_to_int(c)) != -1) {
+                if (n == 0) {
+                    return MBEDTLS_ERR_X509_INVALID_NAME;
+                }
+                *(d++) = n;
+                c++;
+            } else if (c < end && strchr(" ,=+<>#;\"\\", *c)) {
+                *(d++) = *c;
+            } else {
+                return MBEDTLS_ERR_X509_INVALID_NAME;
+            }
+        } else {
+            *(d++) = *c;
+        }
+
+        if (d - data == MBEDTLS_X509_MAX_DN_NAME_SIZE) {
+            return MBEDTLS_ERR_X509_INVALID_NAME;
+        }
+    }
+    *data_len = d - data;
+    return 0;
+}
+
+static int parse_attribute_value_der_encoded(const char *s,
+                                             int len,
+                                             unsigned char *data,
+                                             size_t *data_len,
+                                             int *tag)
+{
+    const char *c = s;
+    const char *end = c + len;
+    unsigned char asn1_der_buf[MBEDTLS_X509_MAX_DN_NAME_SIZE];
+    unsigned char *asn1_der_end;
+    unsigned char *p;
+    unsigned char *d = data;
+    int n;
+
+    /* Converting from hexstring to raw binary so we can use asn1parse.c */
+    if ((len < 5) || (*c != '#')) {
+        return MBEDTLS_ERR_X509_INVALID_NAME;
+    }
+    c++;
+    if ((*tag = hexpair_to_int(c)) == -1) {
+        return MBEDTLS_ERR_X509_INVALID_NAME;
+    }
+    c += 2;
+    p = asn1_der_buf;
+    for (p = asn1_der_buf; c < end; c += 2) {
+        if ((c + 1 >= end) || (n = hexpair_to_int(c)) == -1) {
+            return MBEDTLS_ERR_X509_INVALID_NAME;
+        }
+        if (MBEDTLS_ASN1_IS_STRING_TAG(*tag) && n == 0) {
+            return MBEDTLS_ERR_X509_INVALID_NAME;
+        }
+        *(p++) = n;
+    }
+    asn1_der_end = p;
+
+    p = asn1_der_buf;
+    if (mbedtls_asn1_get_len(&p, asn1_der_end, data_len) != 0) {
+        return MBEDTLS_ERR_X509_INVALID_NAME;
+    }
+
+    while (p < asn1_der_end) {
+        *(d++) = *(p++);
+    }
+
+    return 0;
+}
+
 int mbedtls_x509_string_to_names(mbedtls_asn1_named_data **head, const char *name)
 {
     int ret = MBEDTLS_ERR_X509_INVALID_NAME;
+    int parse_ret = 0;
     const char *s = name, *c = s;
     const char *end = s + strlen(s);
-    const char *oid = NULL;
+    mbedtls_asn1_buf oid = { .p = NULL, .len = 0, .tag = MBEDTLS_ASN1_NULL };
     const x509_attr_descriptor_t *attr_descr = NULL;
-    int in_tag = 1;
+    int in_attr_type = 1;
-    char data[MBEDTLS_X509_MAX_DN_NAME_SIZE];
+    int tag;
-    char *d = data;
+    int numericoid = 0;
+    unsigned char data[MBEDTLS_X509_MAX_DN_NAME_SIZE];
+    size_t data_len = 0;
 
     /* Clear existing chain if present */
     mbedtls_asn1_free_named_data_list(head);
 
     while (c <= end) {
-        if (in_tag && *c == '=') {
+        if (in_attr_type && *c == '=') {
             if ((attr_descr = x509_attr_descr_from_name(s, c - s)) == NULL) {
-                ret = MBEDTLS_ERR_X509_UNKNOWN_OID;
+                if ((mbedtls_oid_from_numeric_string(&oid, s, c - s)) != 0) {
-                goto exit;
+                    return MBEDTLS_ERR_X509_INVALID_NAME;
+                } else {
+                    numericoid = 1;
+                }
+            } else {
+                oid.len = strlen(attr_descr->oid);
+                oid.p = mbedtls_calloc(1, oid.len);
+                memcpy(oid.p, attr_descr->oid, oid.len);
+                numericoid = 0;
             }
 
-            oid = attr_descr->oid;
             s = c + 1;
-            in_tag = 0;
+            in_attr_type = 0;
-            d = data;
         }
 
-        if (!in_tag && *c == '\\' && c != end) {
+        if (!in_attr_type && ((*c == ',' && *(c-1) != '\\') || c == end)) {
-            c++;
+            if (s == c) {
-
+                mbedtls_free(oid.p);
-            /* Check for valid escaped characters */
+                return MBEDTLS_ERR_X509_INVALID_NAME;
-            if (c == end || *c != ',') {
+            } else if (*s == '#') {
-                ret = MBEDTLS_ERR_X509_INVALID_NAME;
+                if ((parse_ret =
-                goto exit;
+                         parse_attribute_value_der_encoded(s, (int) (c - s), data, &data_len,
+                                                           &tag)) != 0) {
+                    mbedtls_free(oid.p);
+                    return MBEDTLS_ERR_X509_INVALID_NAME;
                 }
-        } else if (!in_tag && (*c == ',' || c == end)) {
+            } else {
+                if (numericoid) {
+                    mbedtls_free(oid.p);
+                    return MBEDTLS_ERR_X509_INVALID_NAME;
+                } else {
+                    if ((parse_ret =
+                             parse_attribute_value_string(s, (int) (c - s), data,
+                                                          &data_len)) != 0) {
+                        mbedtls_free(oid.p);
+                        return parse_ret;
+                    }
+                    tag = attr_descr->default_tag;
+                }
+            }
+
             mbedtls_asn1_named_data *cur =
-                mbedtls_asn1_store_named_data(head, oid, strlen(oid),
+                mbedtls_asn1_store_named_data(head, (char *) oid.p, oid.len,
                                               (unsigned char *) data,
-                                              d - data);
+                                              data_len);
-
+            mbedtls_free(oid.p);
+            oid.p = NULL;
             if (cur == NULL) {
                 return MBEDTLS_ERR_X509_ALLOC_FAILED;
             }
 
             // set tagType
-            cur->val.tag = attr_descr->default_tag;
+            cur->val.tag = tag;
 
             while (c < end && *(c + 1) == ' ') {
                 c++;
             }
 
             s = c + 1;
-            in_tag = 1;
+            in_attr_type = 1;
 
             /* Successfully parsed one name, update ret to success */
             ret = 0;
         }
-
-        if (!in_tag && s != c + 1) {
-            *(d++) = *c;
-
-            if (d - data == MBEDTLS_X509_MAX_DN_NAME_SIZE) {
-                ret = MBEDTLS_ERR_X509_INVALID_NAME;
-                goto exit;
-            }
-        }
-
         c++;
     }
-
+    if (oid.p != NULL) {
-exit:
+        mbedtls_free(oid.p);
-
+    }
     return ret;
 }
 

tests/data_files/Makefile

@@ -1441,6 +1441,14 @@ all_final += server1.req.cert_type_empty
 parse_input/server1.req.commas.sha256: server1.key
 	$(MBEDTLS_CERT_REQ) output_file=$@ filename=$< subject_name="C=NL,O=PolarSSL\, Commas,CN=PolarSSL Server 1" md=SHA256
 
+parse_input/server1.req.hashsymbol.sha256: server1.key
+	$(MBEDTLS_CERT_REQ) output_file=$@ filename=$< subject_name="C=NL,O=\#PolarSSL,CN=PolarSSL Server 1" md=SHA256
+
+parse_input/server1.req.spaces.sha256: server1.key
+	$(MBEDTLS_CERT_REQ) output_file=$@ filename=$< subject_name="C=NL,O= PolarSSL ,CN=PolarSSL Server 1" md=SHA256
+
+parse_input/server1.req.asciichars.sha256: server1.key
+	$(MBEDTLS_CERT_REQ) output_file=$@ filename=$< subject_name="C=NL,O=极地SSL,CN=PolarSSL Server 1" md=SHA256
 # server2*
 
 server2_pwd_ec = PolarSSLTest
@@ -1590,7 +1598,13 @@ server1.der: server1.crt
 	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
 server1.commas.crt: server1.key parse_input/server1.req.commas.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
 	$(MBEDTLS_CERT_WRITE) request_file=parse_input/server1.req.commas.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
-all_final += server1.crt server1.noauthid.crt parse_input/server1.crt.der server1.commas.crt
+server1.hashsymbol.crt: server1.key parse_input/server1.req.hashsymbol.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
+	$(MBEDTLS_CERT_WRITE) request_file=parse_input/server1.req.hashsymbol.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
+server1.spaces.crt: server1.key parse_input/server1.req.spaces.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
+	$(MBEDTLS_CERT_WRITE) request_file=parse_input/server1.req.spaces.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
+server1.asciichars.crt: server1.key parse_input/server1.req.asciichars.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
+	$(MBEDTLS_CERT_WRITE) request_file=parse_input/server1.req.asciichars.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
+all_final += server1.crt server1.noauthid.crt parse_input/server1.crt.der server1.commas.crt server1.hashsymbol.crt server1.spaces.crt server1.asciichars.crt
 
 parse_input/server1.key_usage.crt: parse_input/server1.req.sha256
 server1.key_usage.crt: server1.req.sha256

tests/data_files/server1.asciichars.crt

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

tests/data_files/server1.hashsymbol.crt

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

tests/data_files/server1.spaces.crt

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

tests/suites/test_suite_x509parse.data

@@ -184,11 +184,11 @@ x509_cert_info:"data_files/parse_input/server3.crt":"cert. version     \: 3\nser
 
 X509 CRT information Bitstring in subject name
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA1
-x509_cert_info:"data_files/parse_input/bitstring-in-dn.pem":"cert. version     \: 3\nserial number     \: 02\nissuer name       \: CN=Test CA 01, ST=Ecnivorp, C=XX, emailAddress=tca@example.com, O=Test CA Authority\nsubject name      \: C=XX, O=tca, ST=Ecnivorp, OU=TCA, CN=Client, emailAddress=client@example.com, serialNumber=7101012255, uniqueIdentifier=?7101012255\nissued  on        \: 2015-03-11 12\:06\:51\nexpires on        \: 2025-03-08 12\:06\:51\nsigned using      \: RSA with SHA1\nRSA key size      \: 2048 bits\nbasic constraints \: CA=false\nsubject alt name  \:\n    rfc822Name \: client@example.com\next key usage     \: TLS Web Client Authentication\n"
+x509_cert_info:"data_files/parse_input/bitstring-in-dn.pem":"cert. version     \: 3\nserial number     \: 02\nissuer name       \: CN=Test CA 01, ST=Ecnivorp, C=XX, emailAddress=tca@example.com, O=Test CA Authority\nsubject name      \: C=XX, O=tca, ST=Ecnivorp, OU=TCA, CN=Client, emailAddress=client@example.com, serialNumber=7101012255, uniqueIdentifier=#030B0037313031303132323535\nissued  on        \: 2015-03-11 12\:06\:51\nexpires on        \: 2025-03-08 12\:06\:51\nsigned using      \: RSA with SHA1\nRSA key size      \: 2048 bits\nbasic constraints \: CA=false\nsubject alt name  \:\n    rfc822Name \: client@example.com\next key usage     \: TLS Web Client Authentication\n"
 
 X509 CRT information Non-ASCII string in issuer name and subject name
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA256
-x509_cert_info:"data_files/parse_input/non-ascii-string-in-issuer.crt":"cert. version     \: 3\nserial number     \: 05\:E6\:53\:E7\:1B\:74\:F0\:B5\:D3\:84\:6D\:0C\:6D\:DC\:FA\:3F\:A4\:5A\:2B\:E0\nissuer name       \: C=JP, ST=Tokyo, O=?????????????????? Ltd, CN=?????????????????? CA\nsubject name      \: C=JP, ST=Tokyo, O=?????????????????? Ltd, CN=?????????????????? CA\nissued  on        \: 2020-05-20 16\:17\:23\nexpires on        \: 2020-06-19 16\:17\:23\nsigned using      \: RSA with SHA-256\nRSA key size      \: 2048 bits\nbasic constraints \: CA=true\n"
+x509_cert_info:"data_files/parse_input/non-ascii-string-in-issuer.crt":"cert. version     \: 3\nserial number     \: 05\:E6\:53\:E7\:1B\:74\:F0\:B5\:D3\:84\:6D\:0C\:6D\:DC\:FA\:3F\:A4\:5A\:2B\:E0\nissuer name       \: C=JP, ST=Tokyo, O=\\C3\\A3\\C2\\83\\C2\\86\\C3\\A3\\C2\\82\\C2\\B9\\C3\\A3\\C2\\83\\C2\\88 Ltd, CN=\\C3\\A3\\C2\\83\\C2\\86\\C3\\A3\\C2\\82\\C2\\B9\\C3\\A3\\C2\\83\\C2\\88 CA\nsubject name      \: C=JP, ST=Tokyo, O=\\C3\\A3\\C2\\83\\C2\\86\\C3\\A3\\C2\\82\\C2\\B9\\C3\\A3\\C2\\83\\C2\\88 Ltd, CN=\\C3\\A3\\C2\\83\\C2\\86\\C3\\A3\\C2\\82\\C2\\B9\\C3\\A3\\C2\\83\\C2\\88 CA\nissued  on        \: 2020-05-20 16\:17\:23\nexpires on        \: 2020-06-19 16\:17\:23\nsigned using      \: RSA with SHA-256\nRSA key size      \: 2048 bits\nbasic constraints \: CA=true\n"
 
 X509 CRT information Parsing IPv4 and IPv6 IP names
 depends_on:MBEDTLS_PK_CAN_ECDSA_VERIFY:MBEDTLS_MD_CAN_SHA256:MBEDTLS_ECP_DP_SECP256R1_ENABLED:MBEDTLS_RSA_C
@@ -447,6 +447,18 @@ X509 Get Distinguished Name #5
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA1
 mbedtls_x509_dn_gets:"data_files/server1.commas.crt":"subject":"C=NL, O=PolarSSL\\, Commas, CN=PolarSSL Server 1"
 
+X509 Get Distinguished Name #6
+depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA1
+mbedtls_x509_dn_gets:"data_files/server1.hashsymbol.crt":"subject":"C=NL, O=\\#PolarSSL, CN=PolarSSL Server 1"
+
+X509 Get Distinguished Name #7
+depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA1
+mbedtls_x509_dn_gets:"data_files/server1.spaces.crt":"subject":"C=NL, O=\\ PolarSSL\\ , CN=PolarSSL Server 1"
+
+X509 Get Distinguished Name #8
+depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA1
+mbedtls_x509_dn_gets:"data_files/server1.asciichars.crt":"subject":"C=NL, O=\\E6\\9E\\81\\E5\\9C\\B0SSL, CN=PolarSSL Server 1"
+
 X509 Get Modified DN #1
 depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA1
 mbedtls_x509_dn_gets_subject_replace:"data_files/server1.crt":"Modified":"C=NL, O=Modified, CN=PolarSSL Server 1":0
@@ -2373,7 +2385,7 @@ x509parse_crt:"308199308183a0030201008204deadbeef300d06092a864886f70d01010b05003
 
 X509 CRT ASN1 (Name with composite RDN)
 depends_on:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA1
-x509parse_crt:"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":"cert. version     \: 3\nserial number     \: 4C\:20\:E3\:BD\nissuer name       \: C=US, ST=CA, O=Internet Widgits Pty Ltd, CN=Frankencert CA\nsubject name      \: C=US, ST=Washington, ??=US, ??=Delaware, O=Authorize.Net LLC, ??=Private Organization, serialNumber=4369191 + CN=www.authorize.net, L=San Francisco\nissued  on        \: 2013-08-02 15\:14\:37\nexpires on        \: 2015-08-17 05\:54\:31\nsigned using      \: RSA with SHA1\nRSA key size      \: 1024 bits\n":0
+x509parse_crt:"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":"cert. version     \: 3\nserial number     \: 4C\:20\:E3\:BD\nissuer name       \: C=US, ST=CA, O=Internet Widgits Pty Ltd, CN=Frankencert CA\nsubject name      \: C=US, ST=Washington, 1.3.6.1.4.1.311.60.2.1.3=#13025553, 1.3.6.1.4.1.311.60.2.1.2=#130844656C6177617265, O=Authorize.Net LLC, 2.5.4.15=#131450726976617465204F7267616E697A6174696F6E, serialNumber=4369191 + CN=www.authorize.net, L=San Francisco\nissued  on        \: 2013-08-02 15\:14\:37\nexpires on        \: 2015-08-17 05\:54\:31\nsigned using      \: RSA with SHA1\nRSA key size      \: 1024 bits\n":0
 
 X509 CRT ASN1 (Name with PKCS9 email)
 depends_on:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA256

tests/suites/test_suite_x509write.data

@@ -170,7 +170,7 @@ X509 String to Names #1
 mbedtls_x509_string_to_names:"C=NL,O=Offspark\\, Inc., OU=PolarSSL":"C=NL, O=Offspark\\, Inc., OU=PolarSSL":0
 
 X509 String to Names #2
-mbedtls_x509_string_to_names:"C=NL, O=Offspark, Inc., OU=PolarSSL":"":MBEDTLS_ERR_X509_UNKNOWN_OID
+mbedtls_x509_string_to_names:"C=NL, O=Offspark, Inc., OU=PolarSSL":"":MBEDTLS_ERR_X509_INVALID_NAME
 
 X509 String to Names #3 (Name precisely 255 bytes)
 mbedtls_x509_string_to_names:"C=NL, O=123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345,OU=PolarSSL":"C=NL, O=123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345, OU=PolarSSL":0
@@ -184,8 +184,56 @@ mbedtls_x509_string_to_names:"C=NL, O=Offspark\\a Inc., OU=PolarSSL":"":MBEDTLS_
 X509 String to Names #6 (Escape at end)
 mbedtls_x509_string_to_names:"C=NL, O=Offspark\\":"":MBEDTLS_ERR_X509_INVALID_NAME
 
-X509 String to Names #6 (Invalid, no '=' or ',')
+X509 String to Names #7 (Invalid, no '=' or ',')
 mbedtls_x509_string_to_names:"ABC123":"":MBEDTLS_ERR_X509_INVALID_NAME
 
+X509 String to Names #8 (Escaped valid characters)
+mbedtls_x509_string_to_names:"C=NL, O=Offspark\\+ \\> \\=, OU=PolarSSL":"C=NL, O=Offspark\\+ \\> \\=, OU=PolarSSL":0
+
+X509 String to Names #9 (Escaped ascii hexpairs uppercase encoded)
+mbedtls_x509_string_to_names:"C=NL, O=\\4F\\66\\66\\73\\70\\61\\72\\6B, OU=PolarSSL":"C=NL, O=Offspark, OU=PolarSSL":0
+
+X509 String to Names #10 (Escaped ascii hexpairs lowercase encoded)
+mbedtls_x509_string_to_names:"C=NL, O=\\4f\\66\\66\\73\\70\\61\\72\\6b, OU=PolarSSL":"C=NL, O=Offspark, OU=PolarSSL":0
+
+X509 String to Names #11 (Invalid hexpair escape at end of string)
+mbedtls_x509_string_to_names:"C=NL, O=\\4f\\66\\66\\73\\70\\61\\72\\6, OU=PolarSSL":"":MBEDTLS_ERR_X509_INVALID_NAME
+
+X509 String to Names #12 (Reject escaped null hexpair)
+mbedtls_x509_string_to_names:"C=NL, O=Of\\00spark, OU=PolarSSL":"":MBEDTLS_ERR_X509_INVALID_NAME
+
+X509 String to Names #13 (Invalid hexpairs)
+mbedtls_x509_string_to_names:"C=NL, O=Of\\flspark, OU=PolarSSL":"":MBEDTLS_ERR_X509_INVALID_NAME
+
+X509 String to Names #14 (Accept numercoid/hexstring)
+mbedtls_x509_string_to_names:"C=NL, 2.5.4.10=#0C084F6666737061726B, OU=PolarSSL":"C=NL, O=Offspark, OU=PolarSSL":0
+
+X509 String to Names #15 (Odd length DER hexstring)
+mbedtls_x509_string_to_names:"C=NL, 2.5.4.10=#0C084F6666737061726, OU=PolarSSL":"":MBEDTLS_ERR_X509_INVALID_NAME
+
+X509 String to Names #16 (Length mismatch DER hexstring)
+mbedtls_x509_string_to_names:"C=NL, 2.5.4.10=#0C0B4F6666737061726B, OU=PolarSSL":"":MBEDTLS_ERR_X509_INVALID_NAME
+
+X509 String to Names #17 (Invalid OID)
+mbedtls_x509_string_to_names:"C=NL, 10.5.4.10=#0C084F6666737061726B, OU=PolarSSL":"":MBEDTLS_ERR_X509_INVALID_NAME
+
+X509 String to Names #18 (short name and hexstring)
+mbedtls_x509_string_to_names:"C=NL, O=#0C084F6666737061726B, OU=PolarSSL":"C=NL, O=Offspark, OU=PolarSSL":0
+
+X509 String to Names #19 (Accept non-ascii hexpairs)
+mbedtls_x509_string_to_names:"C=NL, O=Of\\CCspark, OU=PolarSSL":"C=NL, O=Of\\CCspark, OU=PolarSSL":0
+
+X509 String to Names #20 (Reject empty AttributeValue)
+mbedtls_x509_string_to_names:"C=NL, O=, OU=PolarSSL":"":MBEDTLS_ERR_X509_INVALID_NAME
+
+X509 Round trip test (Escaped characters)
+mbedtls_x509_string_to_names:"CN=Lu\\C4\\8Di\\C4\\87, O=Offspark, OU=PolarSSL":"CN=Lu\\C4\\8Di\\C4\\87, O=Offspark, OU=PolarSSL":0
+
+X509 Round trip test (hexstring output for non string input)
+mbedtls_x509_string_to_names:"C=NL, 2.5.4.10=#03084F6666737061726B, OU=PolarSSL":"C=NL, O=#03084F6666737061726B, OU=PolarSSL":0
+
+X509 Round trip test (numercoid hexstring output for unknown OID)
+mbedtls_x509_string_to_names:"C=NL, 2.5.4.10.234.532=#0C084F6666737061726B, OU=PolarSSL":"C=NL, 2.5.4.10.234.532=#0C084F6666737061726B, OU=PolarSSL":0
+
 Check max serial length
 x509_set_serial_check: