/********************************************************************************/ /* */ /* TPM X509 RSA */ /* Written by Ken Goldman */ /* IBM Thomas J. Watson Research Center */ /* $Id: X509_RSA.c 1658 2021-01-22 23:14:01Z kgoldman $ */ /* */ /* Licenses and Notices */ /* */ /* 1. Copyright Licenses: */ /* */ /* - Trusted Computing Group (TCG) grants to the user of the source code in */ /* this specification (the "Source Code") a worldwide, irrevocable, */ /* nonexclusive, royalty free, copyright license to reproduce, create */ /* derivative works, distribute, display and perform the Source Code and */ /* derivative works thereof, and to grant others the rights granted herein. */ /* */ /* - The TCG grants to the user of the other parts of the specification */ /* (other than the Source Code) the rights to reproduce, distribute, */ /* display, and perform the specification solely for the purpose of */ /* developing products based on such documents. */ /* */ /* 2. 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X509PushAlgorithmIdentifierSequence(ctx, hashDef->OID); // add the pkcs1-MGF OID ASN1PushOID(ctx, OID_MGF1); } // End outer sequence ASN1EndEncapsulation(ctx, ASN1_CONSTRUCTED_SEQUENCE); } // End the [1] ASN1EndEncapsulation(ctx, ASN1_APPLICAIION_SPECIFIC + 1); // Add the hash algorithm // [0] (1 elem) // SEQUENCE (2 elem) (done by // X509PushAlgorithmIdentifierSequence) // OBJECT IDENTIFIER 2.16.840.1.101.3.4.2.1 sha-256 (NIST) // NULL ASN1StartMarshalContext(ctx); // [0] (1 elem) { X509PushAlgorithmIdentifierSequence(ctx, hashDef->OID); } ASN1EndEncapsulation(ctx, (ASN1_APPLICAIION_SPECIFIC + 0)); } // SEQUENCE (3 elements) end ASN1EndEncapsulation(ctx, ASN1_CONSTRUCTED_SEQUENCE); // RSA PSS OID // OBJECT IDENTIFIER 1.2.840.113549.1.1.10 rsaPSS (PKCS #1) ASN1PushOID(ctx, OID_RSAPSS); } // End Sequence (2 elements) return ASN1EndEncapsulation(ctx, ASN1_CONSTRUCTED_SEQUENCE); } default: break; } return 0; } /* 10.2.25.2.2 X509AddPublicRSA() */ /* This function will add the publicKey description to the DER data. If fillPtr is NULL, then no data is transferred and this function will indicate if the TPM has the values for DER-encoding of the public key. */ /* Return Value Meaning */ /* > 0 number of bytes added */ /* == 0 failure */ INT16 X509AddPublicRSA( OBJECT *object, ASN1MarshalContext *ctx ) { UINT32 exp = object->publicArea.parameters.rsaDetail.exponent; // // If this is a check to see if the key can be encoded, it can. // Need to mark the end sequence if(ctx == NULL) return 1; ASN1StartMarshalContext(ctx); // SEQUENCE (2 elem) 1st ASN1StartMarshalContext(ctx); // BIT STRING ASN1StartMarshalContext(ctx); // SEQUENCE *(2 elem) 3rd // Get public exponent in big-endian byte order. if(exp == 0) exp = RSA_DEFAULT_PUBLIC_EXPONENT; // Push a 4 byte integer. This might get reduced if there are leading zeros or // extended if the high order byte is negative. ASN1PushUINT(ctx, exp); // Push the public key as an integer ASN1PushInteger(ctx, object->publicArea.unique.rsa.t.size, object->publicArea.unique.rsa.t.buffer); // Embed this in a SEQUENCE tag and length in for the key, exponent sequence ASN1EndEncapsulation(ctx, ASN1_CONSTRUCTED_SEQUENCE); // SEQUENCE (3rd) // Embed this in a BIT STRING ASN1EndEncapsulation(ctx, ASN1_BITSTRING); // Now add the formatted SEQUENCE for the RSA public key OID. This is a // fully constructed value so it doesn't need to have a context started X509PushAlgorithmIdentifierSequence(ctx, OID_PKCS1_PUB); return ASN1EndEncapsulation(ctx, ASN1_CONSTRUCTED_SEQUENCE); } #endif // ALG_RSA