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/**
* @author ETSI / STF481
* @version $URL$
* $Id$
* @desc Module containing functions for Security Protocol
*
*/
module LibItsSecurity_Functions {
import from LibCommon_BasicTypesAndValues all;
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import from LibCommon_DataStrings all;
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// LibItsCommon
import from LibItsCommon_Functions all;
import from LibItsSecurity_TypesAndValues all;
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import from LibItsSecurity_Templates all;
import from LibItsSecurity_Pixits all;
import from LibItsSecurity_TestSystem all;
/**
* @desc Produces a 256-bit (32-byte) hash value
* @param p_toBeHashedData Data to be used to calculate the hash value
* @return The hash value
function f_hashWithSha256(
in octetstring p_toBeHashedData
) return Oct32 {
return fx_hashWithSha256(p_toBeHashedData);
} // End of function f_hashWithSha256
/**
* @desc Produces a Elliptic Curve Digital Signature Algorithm (ECDSA) signaturee
* @param p_toBeSignedSecuredMessage The data to be signed
* @return The signature value
function f_signWithEcdsaNistp256WithSha256(
in Oct32 p_toBeSignedSecuredMessage
) runs on ItsSecurityBaseComponent return octetstring {
return fx_signWithEcdsaNistp256WithSha256(
vc_signingPrivateKey
} // End of function f_signWithEcdsaNistp256WithSha256
/**
* @desc Compute the HashedId8 value from the hash value
* @param p_hash The hash value
* @return The HashedId8 value
* @verdict
*/
function f_HashedId8FromSha256(
in Oct32 p_hash
) return HashedId8 {
return substr(p_hash, lengthof(p_hash) - 8, 8);
} // End of function f_HashedId8FromSha256
/**
* @desc Compute the HashedId3 value from the HashedId8 value
* @param p_hashp_hashedId8 The HashedId8 value
* @return The HashedId3 value
*/
function f_HashedId3FromHashedId8 (
in HashedId8 p_hashedId8
) return HashedId3 {
return substr(p_hashedId8, lengthof(p_hashedId8) - 3, 3);
} // End of function f_HashedId3FromHashedId8
/**
* @desc Verify the signature of the specified data
* @param p_toBeVerifiedData The data to be verified
* @param p_signature The signature
* @param p_ecdsaNistp256PublicKeyX The public key (x coordinate)
* @param p_ecdsaNistp256PublicKeyY The public key (y coordinate)
* @return true on success, false otherwise
*/
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function f_verifyWithEcdsaNistp256WithSha256(
in octetstring p_toBeVerifiedData,
in octetstring p_signature,
in octetstring p_ecdsaNistp256PublicKeyX,
in octetstring p_ecdsaNistp256PublicKeyY
) return boolean {
return fx_verifyWithEcdsaNistp256WithSha256(
p_toBeVerifiedData,
p_signature,
p_ecdsaNistp256PublicKeyX,
p_ecdsaNistp256PublicKeyY);
} // End of function f_verifyWithEcdsaNistp256WithSha256
/**
* @desc Calculate digest over the certificate
* @return the digest
* @see Draft ETSI TS 103 097 V1.1.6 Clause 4.2.13 HashedId8
function f_calculateDigestFromCertificate(
in Certificate p_cert
) return HashedId8 {
var octetstring v_toBeHashedData;
var octetstring v_hash;
var integer v_counter;
// Search for digest in the signer_infos field first
for (v_counter := 0; v_counter < lengthof(p_cert.signer_infos); v_counter := v_counter + 1) {
if (p_cert.signer_infos[v_counter].type_ == e_certificate_digest_with_ecdsap256) {
return p_cert.signer_infos[v_counter].signerInfo.digest;
}
} // End of 'for' statement
// Digest not found, compute it
log ("f_calculateDigestFromCertificate: Not found in certificate, compute it");
v_toBeHashedData := bit2oct(encvalue(p_cert));
v_hash := f_hashWithSha256(v_toBeHashedData);
return substr(v_hash, lengthof(v_hash) - 8, 8);
/**
* @desc Build a template of a secured beacon to be used for the Test Adapter secured beaconing processing
*/
function f_buildSecuredMessagePayloadToBeSigned(
in boolean p_includeCertificate := false
) runs on ItsSecurityBaseComponent return ToBeSignedSecuredMessage {
var template (value) ToBeSignedSecuredMessage v_toBeSignedSecuredMessage;
if (p_includeCertificate == true) {
v_toBeSignedSecuredMessage := m_toBeSignedSecuredMessage(
c_security_profileOthers,
{ // Field HeaderFields
m_header_field_signer_info(
m_signerInfo_certificate(
vc_atCertificate
) // End of template m_signerInfo_certificate
), // End of template m_header_field_signer_info
m_header_field_generation_time(oct2int('BBBBBBBB'O)), // To be replaced by TA with generation time
m_header_field_generation_location(
)
}, // End of field HeaderFields
{
m_payload_unsecured(
'AAAAAAAAAA'O // To be replaced by TA with real payload
)
}, // End of field HeaderFields
e_signature
);
} else {
v_toBeSignedSecuredMessage := m_toBeSignedSecuredMessage(
c_security_profileOthers,
{ // Field HeaderFields
m_header_field_signer_info(
m_signerInfo_digest(
vc_atCertificate.signer_infos[0].signerInfo.digest
) // End of template m_signerInfo_certificate
), // End of template m_header_field_signer_info
m_header_field_generation_time(oct2int('BBBBBBBB'O)), // To be replaced by TA with generation time
m_header_field_generation_location(
)
}, // End of field HeaderFields
{
m_payload_unsecured(
'AAAAAAAAAA'O // To be replaced by TA with real payload
)
}, // End of field HeaderFields
e_signature
);
}
/**
* @desc This function build and sign the SecureMessage part covered by the signature process
* @param p_securedMessage The signed SecureMessage part
* @param p_unsecuredPayload The unsigned payload (e.g. a beacon)
* @param p_signerInfoType Add digest or AT certificate or certificate chain
* @param p_headerFields Additional HeaderFields
* @param p_certificateName The certificate identifier to be used. Default: TA_CONFIG_A
* @return true on success, false otherwise
* @verdict Unchanged
*/
function f_buildGnSecuredCam(
out template (value) SecuredMessage p_securedMessage,
in template (omit) SignerInfoType p_signerInfoType := e_certificate_digest_with_ecdsap256,
in template (omit) HeaderFields p_headerFields := omit,
in template (omit) charstring p_certificateName := omit
) runs on ItsSecurityBaseComponent return boolean {
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