| /** |
| * \file x509.h |
| * |
| * \brief X.509 generic defines and structures |
| */ |
| /* |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later |
| */ |
| #ifndef MBEDTLS_X509_H |
| #define MBEDTLS_X509_H |
| #include "mbedtls/private_access.h" |
| |
| #include "mbedtls/build_info.h" |
| |
| #include "mbedtls/asn1.h" |
| #include "mbedtls/pk.h" |
| |
| #if defined(MBEDTLS_RSA_C) |
| #include "mbedtls/rsa.h" |
| #endif |
| |
| /** |
| * \addtogroup x509_module |
| * \{ |
| */ |
| |
| #if !defined(MBEDTLS_X509_MAX_INTERMEDIATE_CA) |
| /** |
| * Maximum number of intermediate CAs in a verification chain. |
| * That is, maximum length of the chain, excluding the end-entity certificate |
| * and the trusted root certificate. |
| * |
| * Set this to a low value to prevent an adversary from making you waste |
| * resources verifying an overlong certificate chain. |
| */ |
| #define MBEDTLS_X509_MAX_INTERMEDIATE_CA 8 |
| #endif |
| |
| /** |
| * \name X509 Error codes |
| * \{ |
| */ |
| /** Unavailable feature, e.g. RSA hashing/encryption combination. */ |
| #define MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE -0x2080 |
| /** Requested OID is unknown. */ |
| #define MBEDTLS_ERR_X509_UNKNOWN_OID -0x2100 |
| /** The CRT/CRL/CSR format is invalid, e.g. different type expected. */ |
| #define MBEDTLS_ERR_X509_INVALID_FORMAT -0x2180 |
| /** The CRT/CRL/CSR version element is invalid. */ |
| #define MBEDTLS_ERR_X509_INVALID_VERSION -0x2200 |
| /** The serial tag or value is invalid. */ |
| #define MBEDTLS_ERR_X509_INVALID_SERIAL -0x2280 |
| /** The algorithm tag or value is invalid. */ |
| #define MBEDTLS_ERR_X509_INVALID_ALG -0x2300 |
| /** The name tag or value is invalid. */ |
| #define MBEDTLS_ERR_X509_INVALID_NAME -0x2380 |
| /** The date tag or value is invalid. */ |
| #define MBEDTLS_ERR_X509_INVALID_DATE -0x2400 |
| /** The signature tag or value invalid. */ |
| #define MBEDTLS_ERR_X509_INVALID_SIGNATURE -0x2480 |
| /** The extension tag or value is invalid. */ |
| #define MBEDTLS_ERR_X509_INVALID_EXTENSIONS -0x2500 |
| /** CRT/CRL/CSR has an unsupported version number. */ |
| #define MBEDTLS_ERR_X509_UNKNOWN_VERSION -0x2580 |
| /** Signature algorithm (oid) is unsupported. */ |
| #define MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG -0x2600 |
| /** Signature algorithms do not match. (see \c ::mbedtls_x509_crt sig_oid) */ |
| #define MBEDTLS_ERR_X509_SIG_MISMATCH -0x2680 |
| /** Certificate verification failed, e.g. CRL, CA or signature check failed. */ |
| #define MBEDTLS_ERR_X509_CERT_VERIFY_FAILED -0x2700 |
| /** Format not recognized as DER or PEM. */ |
| #define MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT -0x2780 |
| /** Input invalid. */ |
| #define MBEDTLS_ERR_X509_BAD_INPUT_DATA -0x2800 |
| /** Allocation of memory failed. */ |
| #define MBEDTLS_ERR_X509_ALLOC_FAILED -0x2880 |
| /** Read/write of file failed. */ |
| #define MBEDTLS_ERR_X509_FILE_IO_ERROR -0x2900 |
| /** Destination buffer is too small. */ |
| #define MBEDTLS_ERR_X509_BUFFER_TOO_SMALL -0x2980 |
| /** A fatal error occurred, eg the chain is too long or the vrfy callback failed. */ |
| #define MBEDTLS_ERR_X509_FATAL_ERROR -0x3000 |
| /** \} name X509 Error codes */ |
| |
| /** |
| * \name X509 Verify codes |
| * \{ |
| */ |
| /* Reminder: update x509_crt_verify_strings[] in library/x509_crt.c */ |
| #define MBEDTLS_X509_BADCERT_EXPIRED 0x01 /**< The certificate validity has expired. */ |
| #define MBEDTLS_X509_BADCERT_REVOKED 0x02 /**< The certificate has been revoked (is on a CRL). */ |
| #define MBEDTLS_X509_BADCERT_CN_MISMATCH 0x04 /**< The certificate Common Name (CN) does not match with the expected CN. */ |
| #define MBEDTLS_X509_BADCERT_NOT_TRUSTED 0x08 /**< The certificate is not correctly signed by the trusted CA. */ |
| #define MBEDTLS_X509_BADCRL_NOT_TRUSTED 0x10 /**< The CRL is not correctly signed by the trusted CA. */ |
| #define MBEDTLS_X509_BADCRL_EXPIRED 0x20 /**< The CRL is expired. */ |
| #define MBEDTLS_X509_BADCERT_MISSING 0x40 /**< Certificate was missing. */ |
| #define MBEDTLS_X509_BADCERT_SKIP_VERIFY 0x80 /**< Certificate verification was skipped. */ |
| #define MBEDTLS_X509_BADCERT_OTHER 0x0100 /**< Other reason (can be used by verify callback) */ |
| #define MBEDTLS_X509_BADCERT_FUTURE 0x0200 /**< The certificate validity starts in the future. */ |
| #define MBEDTLS_X509_BADCRL_FUTURE 0x0400 /**< The CRL is from the future */ |
| #define MBEDTLS_X509_BADCERT_KEY_USAGE 0x0800 /**< Usage does not match the keyUsage extension. */ |
| #define MBEDTLS_X509_BADCERT_EXT_KEY_USAGE 0x1000 /**< Usage does not match the extendedKeyUsage extension. */ |
| #define MBEDTLS_X509_BADCERT_NS_CERT_TYPE 0x2000 /**< Usage does not match the nsCertType extension. */ |
| #define MBEDTLS_X509_BADCERT_BAD_MD 0x4000 /**< The certificate is signed with an unacceptable hash. */ |
| #define MBEDTLS_X509_BADCERT_BAD_PK 0x8000 /**< The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA). */ |
| #define MBEDTLS_X509_BADCERT_BAD_KEY 0x010000 /**< The certificate is signed with an unacceptable key (eg bad curve, RSA too short). */ |
| #define MBEDTLS_X509_BADCRL_BAD_MD 0x020000 /**< The CRL is signed with an unacceptable hash. */ |
| #define MBEDTLS_X509_BADCRL_BAD_PK 0x040000 /**< The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA). */ |
| #define MBEDTLS_X509_BADCRL_BAD_KEY 0x080000 /**< The CRL is signed with an unacceptable key (eg bad curve, RSA too short). */ |
| |
| /** \} name X509 Verify codes */ |
| /** \} addtogroup x509_module */ |
| |
| /* |
| * X.509 v3 Subject Alternative Name types. |
| * otherName [0] OtherName, |
| * rfc822Name [1] IA5String, |
| * dNSName [2] IA5String, |
| * x400Address [3] ORAddress, |
| * directoryName [4] Name, |
| * ediPartyName [5] EDIPartyName, |
| * uniformResourceIdentifier [6] IA5String, |
| * iPAddress [7] OCTET STRING, |
| * registeredID [8] OBJECT IDENTIFIER |
| */ |
| #define MBEDTLS_X509_SAN_OTHER_NAME 0 |
| #define MBEDTLS_X509_SAN_RFC822_NAME 1 |
| #define MBEDTLS_X509_SAN_DNS_NAME 2 |
| #define MBEDTLS_X509_SAN_X400_ADDRESS_NAME 3 |
| #define MBEDTLS_X509_SAN_DIRECTORY_NAME 4 |
| #define MBEDTLS_X509_SAN_EDI_PARTY_NAME 5 |
| #define MBEDTLS_X509_SAN_UNIFORM_RESOURCE_IDENTIFIER 6 |
| #define MBEDTLS_X509_SAN_IP_ADDRESS 7 |
| #define MBEDTLS_X509_SAN_REGISTERED_ID 8 |
| |
| /* |
| * X.509 v3 Key Usage Extension flags |
| * Reminder: update mbedtls_x509_info_key_usage() when adding new flags. |
| */ |
| #define MBEDTLS_X509_KU_DIGITAL_SIGNATURE (0x80) /* bit 0 */ |
| #define MBEDTLS_X509_KU_NON_REPUDIATION (0x40) /* bit 1 */ |
| #define MBEDTLS_X509_KU_KEY_ENCIPHERMENT (0x20) /* bit 2 */ |
| #define MBEDTLS_X509_KU_DATA_ENCIPHERMENT (0x10) /* bit 3 */ |
| #define MBEDTLS_X509_KU_KEY_AGREEMENT (0x08) /* bit 4 */ |
| #define MBEDTLS_X509_KU_KEY_CERT_SIGN (0x04) /* bit 5 */ |
| #define MBEDTLS_X509_KU_CRL_SIGN (0x02) /* bit 6 */ |
| #define MBEDTLS_X509_KU_ENCIPHER_ONLY (0x01) /* bit 7 */ |
| #define MBEDTLS_X509_KU_DECIPHER_ONLY (0x8000) /* bit 8 */ |
| |
| /* |
| * Netscape certificate types |
| * (http://www.mozilla.org/projects/security/pki/nss/tech-notes/tn3.html) |
| */ |
| |
| #define MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT (0x80) /* bit 0 */ |
| #define MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER (0x40) /* bit 1 */ |
| #define MBEDTLS_X509_NS_CERT_TYPE_EMAIL (0x20) /* bit 2 */ |
| #define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING (0x10) /* bit 3 */ |
| #define MBEDTLS_X509_NS_CERT_TYPE_RESERVED (0x08) /* bit 4 */ |
| #define MBEDTLS_X509_NS_CERT_TYPE_SSL_CA (0x04) /* bit 5 */ |
| #define MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA (0x02) /* bit 6 */ |
| #define MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA (0x01) /* bit 7 */ |
| |
| /* |
| * X.509 extension types |
| * |
| * Comments refer to the status for using certificates. Status can be |
| * different for writing certificates or reading CRLs or CSRs. |
| * |
| * Those are defined in oid.h as oid.c needs them in a data structure. Since |
| * these were previously defined here, let's have aliases for compatibility. |
| */ |
| #define MBEDTLS_X509_EXT_AUTHORITY_KEY_IDENTIFIER MBEDTLS_OID_X509_EXT_AUTHORITY_KEY_IDENTIFIER |
| #define MBEDTLS_X509_EXT_SUBJECT_KEY_IDENTIFIER MBEDTLS_OID_X509_EXT_SUBJECT_KEY_IDENTIFIER |
| #define MBEDTLS_X509_EXT_KEY_USAGE MBEDTLS_OID_X509_EXT_KEY_USAGE |
| #define MBEDTLS_X509_EXT_CERTIFICATE_POLICIES MBEDTLS_OID_X509_EXT_CERTIFICATE_POLICIES |
| #define MBEDTLS_X509_EXT_POLICY_MAPPINGS MBEDTLS_OID_X509_EXT_POLICY_MAPPINGS |
| #define MBEDTLS_X509_EXT_SUBJECT_ALT_NAME MBEDTLS_OID_X509_EXT_SUBJECT_ALT_NAME /* Supported (DNS) */ |
| #define MBEDTLS_X509_EXT_ISSUER_ALT_NAME MBEDTLS_OID_X509_EXT_ISSUER_ALT_NAME |
| #define MBEDTLS_X509_EXT_SUBJECT_DIRECTORY_ATTRS MBEDTLS_OID_X509_EXT_SUBJECT_DIRECTORY_ATTRS |
| #define MBEDTLS_X509_EXT_BASIC_CONSTRAINTS MBEDTLS_OID_X509_EXT_BASIC_CONSTRAINTS /* Supported */ |
| #define MBEDTLS_X509_EXT_NAME_CONSTRAINTS MBEDTLS_OID_X509_EXT_NAME_CONSTRAINTS |
| #define MBEDTLS_X509_EXT_POLICY_CONSTRAINTS MBEDTLS_OID_X509_EXT_POLICY_CONSTRAINTS |
| #define MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE MBEDTLS_OID_X509_EXT_EXTENDED_KEY_USAGE |
| #define MBEDTLS_X509_EXT_CRL_DISTRIBUTION_POINTS MBEDTLS_OID_X509_EXT_CRL_DISTRIBUTION_POINTS |
| #define MBEDTLS_X509_EXT_INIHIBIT_ANYPOLICY MBEDTLS_OID_X509_EXT_INIHIBIT_ANYPOLICY |
| #define MBEDTLS_X509_EXT_FRESHEST_CRL MBEDTLS_OID_X509_EXT_FRESHEST_CRL |
| #define MBEDTLS_X509_EXT_NS_CERT_TYPE MBEDTLS_OID_X509_EXT_NS_CERT_TYPE |
| |
| /* |
| * Storage format identifiers |
| * Recognized formats: PEM and DER |
| */ |
| #define MBEDTLS_X509_FORMAT_DER 1 |
| #define MBEDTLS_X509_FORMAT_PEM 2 |
| |
| #define MBEDTLS_X509_MAX_DN_NAME_SIZE 256 /**< Maximum value size of a DN entry */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \addtogroup x509_module |
| * \{ */ |
| |
| /** |
| * \name Structures for parsing X.509 certificates, CRLs and CSRs |
| * \{ |
| */ |
| |
| /** |
| * Type-length-value structure that allows for ASN1 using DER. |
| */ |
| typedef mbedtls_asn1_buf mbedtls_x509_buf; |
| |
| /** |
| * Container for ASN1 bit strings. |
| */ |
| typedef mbedtls_asn1_bitstring mbedtls_x509_bitstring; |
| |
| /** |
| * Container for ASN1 named information objects. |
| * It allows for Relative Distinguished Names (e.g. cn=localhost,ou=code,etc.). |
| */ |
| typedef mbedtls_asn1_named_data mbedtls_x509_name; |
| |
| /** |
| * Container for a sequence of ASN.1 items |
| */ |
| typedef mbedtls_asn1_sequence mbedtls_x509_sequence; |
| |
| /* |
| * Container for the fields of the Authority Key Identifier object |
| */ |
| typedef struct mbedtls_x509_authority { |
| mbedtls_x509_buf keyIdentifier; |
| mbedtls_x509_sequence authorityCertIssuer; |
| mbedtls_x509_buf authorityCertSerialNumber; |
| mbedtls_x509_buf raw; |
| } |
| mbedtls_x509_authority; |
| |
| /** Container for date and time (precision in seconds). */ |
| typedef struct mbedtls_x509_time { |
| int year, mon, day; /**< Date. */ |
| int hour, min, sec; /**< Time. */ |
| } |
| mbedtls_x509_time; |
| |
| /** |
| * From RFC 5280 section 4.2.1.6: |
| * OtherName ::= SEQUENCE { |
| * type-id OBJECT IDENTIFIER, |
| * value [0] EXPLICIT ANY DEFINED BY type-id } |
| * |
| * Future versions of the library may add new fields to this structure or |
| * to its embedded union and structure. |
| */ |
| typedef struct mbedtls_x509_san_other_name { |
| /** |
| * The type_id is an OID as defined in RFC 5280. |
| * To check the value of the type id, you should use |
| * \p MBEDTLS_OID_CMP with a known OID mbedtls_x509_buf. |
| */ |
| mbedtls_x509_buf type_id; /**< The type id. */ |
| union { |
| /** |
| * From RFC 4108 section 5: |
| * HardwareModuleName ::= SEQUENCE { |
| * hwType OBJECT IDENTIFIER, |
| * hwSerialNum OCTET STRING } |
| */ |
| struct { |
| mbedtls_x509_buf oid; /**< The object identifier. */ |
| mbedtls_x509_buf val; /**< The named value. */ |
| } |
| hardware_module_name; |
| } |
| value; |
| } |
| mbedtls_x509_san_other_name; |
| |
| /** |
| * A structure for holding the parsed Subject Alternative Name, |
| * according to type. |
| * |
| * Future versions of the library may add new fields to this structure or |
| * to its embedded union and structure. |
| */ |
| typedef struct mbedtls_x509_subject_alternative_name { |
| int type; /**< The SAN type, value of MBEDTLS_X509_SAN_XXX. */ |
| union { |
| mbedtls_x509_san_other_name other_name; |
| mbedtls_x509_name directory_name; |
| mbedtls_x509_buf unstructured_name; /**< The buffer for the unstructured types. rfc822Name, dnsName and uniformResourceIdentifier are currently supported. */ |
| } |
| san; /**< A union of the supported SAN types */ |
| } |
| mbedtls_x509_subject_alternative_name; |
| |
| typedef struct mbedtls_x509_san_list { |
| mbedtls_x509_subject_alternative_name node; |
| struct mbedtls_x509_san_list *next; |
| } |
| mbedtls_x509_san_list; |
| |
| /** \} name Structures for parsing X.509 certificates, CRLs and CSRs */ |
| /** \} addtogroup x509_module */ |
| |
| /** |
| * \brief Store the certificate DN in printable form into buf; |
| * no more than size characters will be written. |
| * |
| * \param buf Buffer to write to |
| * \param size Maximum size of buffer |
| * \param dn The X509 name to represent |
| * |
| * \return The length of the string written (not including the |
| * terminated nul byte), or a negative error code. |
| */ |
| int mbedtls_x509_dn_gets(char *buf, size_t size, const mbedtls_x509_name *dn); |
| |
| /** |
| * \brief Convert the certificate DN string \p name into |
| * a linked list of mbedtls_x509_name (equivalent to |
| * mbedtls_asn1_named_data). |
| * |
| * \note This function allocates a linked list, and places the head |
| * pointer in \p head. This list must later be freed by a |
| * call to mbedtls_asn1_free_named_data_list(). |
| * |
| * \param[out] head Address in which to store the pointer to the head of the |
| * allocated list of mbedtls_x509_name |
| * \param[in] name The string representation of a DN to convert |
| * |
| * \return 0 on success, or a negative error code. |
| */ |
| int mbedtls_x509_string_to_names(mbedtls_asn1_named_data **head, const char *name); |
| |
| /** |
| * \brief Return the next relative DN in an X509 name. |
| * |
| * \note Intended use is to compare function result to dn->next |
| * in order to detect boundaries of multi-valued RDNs. |
| * |
| * \param dn Current node in the X509 name |
| * |
| * \return Pointer to the first attribute-value pair of the |
| * next RDN in sequence, or NULL if end is reached. |
| */ |
| static inline mbedtls_x509_name *mbedtls_x509_dn_get_next( |
| mbedtls_x509_name *dn) |
| { |
| while (dn->MBEDTLS_PRIVATE(next_merged) && dn->next != NULL) { |
| dn = dn->next; |
| } |
| return dn->next; |
| } |
| |
| /** |
| * \brief Store the certificate serial in printable form into buf; |
| * no more than size characters will be written. |
| * |
| * \param buf Buffer to write to |
| * \param size Maximum size of buffer |
| * \param serial The X509 serial to represent |
| * |
| * \return The length of the string written (not including the |
| * terminated nul byte), or a negative error code. |
| */ |
| int mbedtls_x509_serial_gets(char *buf, size_t size, const mbedtls_x509_buf *serial); |
| |
| /** |
| * \brief Compare pair of mbedtls_x509_time. |
| * |
| * \param t1 mbedtls_x509_time to compare |
| * \param t2 mbedtls_x509_time to compare |
| * |
| * \return < 0 if t1 is before t2 |
| * 0 if t1 equals t2 |
| * > 0 if t1 is after t2 |
| */ |
| int mbedtls_x509_time_cmp(const mbedtls_x509_time *t1, const mbedtls_x509_time *t2); |
| |
| #if defined(MBEDTLS_HAVE_TIME_DATE) |
| /** |
| * \brief Fill mbedtls_x509_time with provided mbedtls_time_t. |
| * |
| * \param tt mbedtls_time_t to convert |
| * \param now mbedtls_x509_time to fill with converted mbedtls_time_t |
| * |
| * \return \c 0 on success |
| * \return A non-zero return value on failure. |
| */ |
| int mbedtls_x509_time_gmtime(mbedtls_time_t tt, mbedtls_x509_time *now); |
| #endif /* MBEDTLS_HAVE_TIME_DATE */ |
| |
| /** |
| * \brief Check a given mbedtls_x509_time against the system time |
| * and tell if it's in the past. |
| * |
| * \note Intended usage is "if( is_past( valid_to ) ) ERROR". |
| * Hence the return value of 1 if on internal errors. |
| * |
| * \param to mbedtls_x509_time to check |
| * |
| * \return 1 if the given time is in the past or an error occurred, |
| * 0 otherwise. |
| */ |
| int mbedtls_x509_time_is_past(const mbedtls_x509_time *to); |
| |
| /** |
| * \brief Check a given mbedtls_x509_time against the system time |
| * and tell if it's in the future. |
| * |
| * \note Intended usage is "if( is_future( valid_from ) ) ERROR". |
| * Hence the return value of 1 if on internal errors. |
| * |
| * \param from mbedtls_x509_time to check |
| * |
| * \return 1 if the given time is in the future or an error occurred, |
| * 0 otherwise. |
| */ |
| int mbedtls_x509_time_is_future(const mbedtls_x509_time *from); |
| |
| /** |
| * \brief This function parses an item in the SubjectAlternativeNames |
| * extension. Please note that this function might allocate |
| * additional memory for a subject alternative name, thus |
| * mbedtls_x509_free_subject_alt_name has to be called |
| * to dispose of this additional memory afterwards. |
| * |
| * \param san_buf The buffer holding the raw data item of the subject |
| * alternative name. |
| * \param san The target structure to populate with the parsed presentation |
| * of the subject alternative name encoded in \p san_buf. |
| * |
| * \note Supported GeneralName types, as defined in RFC 5280: |
| * "rfc822Name", "dnsName", "directoryName", |
| * "uniformResourceIdentifier" and "hardware_module_name" |
| * of type "otherName", as defined in RFC 4108. |
| * |
| * \note This function should be called on a single raw data of |
| * subject alternative name. For example, after successful |
| * certificate parsing, one must iterate on every item in the |
| * \c crt->subject_alt_names sequence, and pass it to |
| * this function. |
| * |
| * \warning The target structure contains pointers to the raw data of the |
| * parsed certificate, and its lifetime is restricted by the |
| * lifetime of the certificate. |
| * |
| * \return \c 0 on success |
| * \return #MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE for an unsupported |
| * SAN type. |
| * \return Another negative value for any other failure. |
| */ |
| int mbedtls_x509_parse_subject_alt_name(const mbedtls_x509_buf *san_buf, |
| mbedtls_x509_subject_alternative_name *san); |
| /** |
| * \brief Unallocate all data related to subject alternative name |
| * |
| * \param san SAN structure - extra memory owned by this structure will be freed |
| */ |
| void mbedtls_x509_free_subject_alt_name(mbedtls_x509_subject_alternative_name *san); |
| |
| /** |
| * \brief This function parses a CN string as an IP address. |
| * |
| * \param cn The CN string to parse. CN string MUST be null-terminated. |
| * \param dst The target buffer to populate with the binary IP address. |
| * The buffer MUST be 16 bytes to save IPv6, and should be |
| * 4-byte aligned if the result will be used as struct in_addr. |
| * e.g. uint32_t dst[4] |
| * |
| * \note \p cn is parsed as an IPv6 address if string contains ':', |
| * else \p cn is parsed as an IPv4 address. |
| * |
| * \return Length of binary IP address; num bytes written to target. |
| * \return \c 0 on failure to parse CN string as an IP address. |
| */ |
| size_t mbedtls_x509_crt_parse_cn_inet_pton(const char *cn, void *dst); |
| |
| #define MBEDTLS_X509_SAFE_SNPRINTF \ |
| do { \ |
| if (ret < 0 || (size_t) ret >= n) \ |
| return MBEDTLS_ERR_X509_BUFFER_TOO_SMALL; \ |
| \ |
| n -= (size_t) ret; \ |
| p += (size_t) ret; \ |
| } while (0) |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* MBEDTLS_X509_H */ |
