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| − | '''Ultibo X.509 interface unit''' | + | '''Ultibo X.509 Interface unit''' |
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| | X.509 is a standard that defines the format of public key certificates. An X.509 certificate contains a public key and an identity (a hostname, or an organization, or an individual), and is either signed by a certificate authority or self-signed. When a certificate is signed by a trusted certificate authority, or validated by other means, someone holding that certificate can rely on the public key it contains to establish secure communications with another party, or validate documents digitally signed by the corresponding private key. | | X.509 is a standard that defines the format of public key certificates. An X.509 certificate contains a public key and an identity (a hostname, or an organization, or an individual), and is either signed by a certificate authority or self-signed. When a certificate is signed by a trusted certificate authority, or validated by other means, someone holding that certificate can rely on the public key it contains to establish secure communications with another party, or validate documents digitally signed by the corresponding private key. |
Latest revision as of 04:48, 31 August 2021
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Description
Ultibo X.509 Interface unit
X.509 is a standard that defines the format of public key certificates. An X.509 certificate contains a public key and an identity (a hostname, or an organization, or an individual), and is either signed by a certificate authority or self-signed. When a certificate is signed by a trusted certificate authority, or validated by other means, someone holding that certificate can rely on the public key it contains to establish secure communications with another party, or validate documents digitally signed by the corresponding private key.
This unit currently only provides the basic functionality required to read and parse an X.509 certificate in DER or PEM format and extract basic information such as the issuer, subject, validity, algorithm and public key.
It is expected that this unit will be expanded to incorporate additional functions over time.
Constants
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X509 specific constants X509_*
X509_MAX_NAME_ATTRIBUTES = 20;
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X509_MAX_SERIAL_NUM_LEN = 20;
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X509 name attribute X509_NAME_ATTR_*
X509_NAME_ATTR_NONE = 0;
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X509_NAME_ATTR_DC = 1;
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X509_NAME_ATTR_CN = 2;
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X509_NAME_ATTR_C = 3;
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X509_NAME_ATTR_L = 4;
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X509_NAME_ATTR_ST = 5;
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X509_NAME_ATTR_O = 6;
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X509_NAME_ATTR_OU = 7;
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X509 validate X509_VALIDATE_*
X509_VALIDATE_OK = 0;
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X509_VALIDATE_BAD_CERTIFICATE = 1;
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X509_VALIDATE_UNSUPPORTED_CERTIFICATE = 2;
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X509_VALIDATE_CERTIFICATE_REVOKED = 3;
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X509_VALIDATE_CERTIFICATE_EXPIRED = 4;
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X509_VALIDATE_CERTIFICATE_UNKNOWN = 5;
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X509_VALIDATE_UNKNOWN_CA = 6;
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X509 certificate version X509_CERT_V*
X509_CERT_V1 = 0;
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X509_CERT_V2 = 1;
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X509_CERT_V3 = 2;
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X509 certificate extension X509_EXT_*
X509_EXT_BASIC_CONSTRAINTS = (1 shl 0);
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X509_EXT_PATH_LEN_CONSTRAINT = (1 shl 1);
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X509_EXT_KEY_USAGE = (1 shl 2);
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X509_EXT_SUBJECT_ALT_NAME = (1 shl 3);
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X509_EXT_ISSUER_ALT_NAME = (1 shl 4);
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X509_EXT_EXT_KEY_USAGE = (1 shl 5);
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X509 certificate key usage X509_KEY_USAGE_*
| Note: RFC5280 Section 4.2.1.3. - Key Usage
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X509_KEY_USAGE_DIGITAL_SIGNATURE = (1 shl 0);
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digitalSignature - The digitalSignature bit is asserted when the subject public key is used for verifying digital signatures, other than signatures on certificates.
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X509_KEY_USAGE_NON_REPUDIATION = (1 shl 1);
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nonRepudiation - The nonRepudiation bit is asserted when the subject public key is used to verify digital signatures, other than signatures on certificates.
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X509_KEY_USAGE_KEY_ENCIPHERMENT = (1 shl 2);
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keyEncipherment - The keyEncipherment bit is asserted when the subject public key is used for enciphering private or secret keys, i.e., for key transport
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X509_KEY_USAGE_DATA_ENCIPHERMENT = (1 shl 3);
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dataEncipherment - The dataEncipherment bit is asserted when the subject public key is used for directly enciphering raw user data without the use of an intermediate symmetric cipher.
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X509_KEY_USAGE_KEY_AGREEMENT = (1 shl 4);
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keyAgreement - The keyAgreement bit is asserted when the subject public key is used for key agreement
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X509_KEY_USAGE_KEY_CERT_SIGN = (1 shl 5);
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keyCertSign - The keyCertSign bit is asserted when the subject public key is used for verifying signatures on public key certificates
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X509_KEY_USAGE_CRL_SIGN = (1 shl 6);
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cRLSign - The cRLSign bit is asserted when the subject public key is used for verifying signatures on certificate revocation lists
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X509_KEY_USAGE_ENCIPHER_ONLY = (1 shl 7);
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encipherOnly - When the encipherOnly bit is asserted and the keyAgreement bit is also set, the subject public key may be used only for enciphering data while performing key agreement.
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X509_KEY_USAGE_DECIPHER_ONLY = (1 shl 8);
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decipherOnly - When the decipherOnly bit is asserted and the keyAgreement bit is also set, the subject public key may be used only for deciphering data while performing key agreement.
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[Expand]
X509 certificate extended key usage X509_EXT_KEY_USAGE_*
X509_EXT_KEY_USAGE_ANY = (1 shl 0);
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X509_EXT_KEY_USAGE_SERVER_AUTH = (1 shl 1);
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X509_EXT_KEY_USAGE_CLIENT_AUTH = (1 shl 2);
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X509_EXT_KEY_USAGE_OCSP = (1 shl 3);
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[Expand]
X509 certificate file types NAME_*
X509_FILETYPE_PEM = 1;
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X509_FILETYPE_ASN1 = 2;
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Type definitions
X509 serial number
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PX509SerialNumber = ^TX509SerialNumber;
TX509SerialNumber = record
Value:array[0..X509_MAX_SERIAL_NUM_LEN - 1] of Byte;
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Length:Integer;
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function ToString:String;
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X509 name attribute
[Expand]
PX509NameAttribute = ^TX509NameAttribute;
TX509NameAttribute = record
Value:String;
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_Type:LongWord;
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function ToString:String;
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X509 name attributes
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PX509NameAttributes = ^TX509NameAttributes;
TX509NameAttributes = array[0..X509_MAX_NAME_ATTRIBUTES - 1] of TX509NameAttribute;
X509 algorithm identifier
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PX509AlgorithmIdentifier = ^TX509AlgorithmIdentifier;
TX509AlgorithmIdentifier = record
OID:TASN1OID;
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function ToString:String;
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X509 public key
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PX509PublicKey = ^TX509PublicKey;
TX509PublicKey = record
Algorithm:TX509AlgorithmIdentifier;
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Key:PByte;
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Length:Integer;
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procedure Release;
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function ToString:String;
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X509 private key
[Expand]
PX509PrivateKey = ^TX509PrivateKey;
TX509PrivateKey = record
| Note: RFC3447 - Appendix A.1.2 - RSA private key syntax
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Algorithm:TX509AlgorithmIdentifier;
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Key:PByte;
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Length:Integer;
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procedure Release;
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function ToString:String;
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X509 signature
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PX509Signature = ^TX509Signature;
TX509Signature = record
Algorithm:TX509AlgorithmIdentifier;
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Value:PByte;
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Length:Integer;
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procedure Release;
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X509 RSA public key
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PX509RSAPublicKey = ^TX509RSAPublicKey;
TX509RSAPublicKey = record
Modulus:PByte;
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M
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PublicExponent:PByte;
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E
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ModulusLen:Integer;
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PublicExponentLen:Integer;
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function ImportDER(ABuffer:Pointer; ASize:Integer):Boolean;
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procedure Release;
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X509 RSA private key
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PX509RSAPrivateKey = ^TX509RSAPrivateKey;
TX509RSAPrivateKey = record
Version:Integer;
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Modulus:PByte;
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PublicExponent:PByte;
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PrivateExponent:PByte;
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D
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Prime1:PByte;
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P
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Prime2:PByte;
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Q
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Exponent1:PByte;
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D mod (P - 1)
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Exponent2:PByte;
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D mod (Q - 1)
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Coefficient:PByte;
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(Inverse of Q) mod P
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ModulusLen:Integer;
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PublicExponentLen:Integer;
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PrivateExponentLen:Integer;
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Prime1Len:Integer;
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Prime2Len:Integer;
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Exponent1Len:Integer;
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Exponent2Len:Integer;
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CoefficientLen:Integer;
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function ImportDER(ABuffer:Pointer; ASize:Integer):Boolean;
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procedure Release;
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X509 ECDSA public key
[Expand]
PX509ECDSAPublicKey = ^TX509ECDSAPublicKey;
TX509ECDSAPublicKey = record
function ImportDER(ABuffer:Pointer; ASize:Integer):Boolean;
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procedure Release;
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X509 ECDSA private key
[Expand]
PX509ECDSAPrivateKey = ^TX509ECDSAPrivateKey;
TX509ECDSAPrivateKey = record
function ImportDER(ABuffer:Pointer; ASize:Integer):Boolean;
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procedure Release;
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Class definitions
X509 specific classes
Public variables
None defined
Function declarations
X509 helper functions
[Expand]
function X509NameAttributeTypeToString(AType:LongWord):String;
Description: To be documented
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