Vadim Bendebury | 5679752 | 2015-05-20 10:32:25 -0700 | [diff] [blame] | 1 | // This file was extracted from the TCG Published |
| 2 | // Trusted Platform Module Library |
| 3 | // Part 3: Commands |
| 4 | // Family "2.0" |
| 5 | // Level 00 Revision 01.16 |
| 6 | // October 30, 2014 |
| 7 | |
| 8 | #include "InternalRoutines.h" |
| 9 | #include "MakeCredential_fp.h" |
| 10 | #include "Object_spt_fp.h" |
| 11 | // |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_KEY handle referenced an ECC key that has a unique field that is not a |
| 16 | // point on the curve of the key |
| 17 | // TPM_RC_SIZE credential is larger than the digest size of Name algorithm of handle |
| 18 | // TPM_RC_TYPE handle does not reference an asymmetric decryption key |
| 19 | // |
| 20 | TPM_RC |
| 21 | TPM2_MakeCredential( |
| 22 | MakeCredential_In *in, // IN: input parameter list |
| 23 | MakeCredential_Out *out // OUT: output parameter list |
| 24 | ) |
| 25 | { |
| 26 | TPM_RC result = TPM_RC_SUCCESS; |
| 27 | |
| 28 | OBJECT *object; |
| 29 | TPM2B_DATA data; |
| 30 | |
| 31 | // Input Validation |
| 32 | |
| 33 | // Get object pointer |
| 34 | object = ObjectGet(in->handle); |
| 35 | |
| 36 | // input key must be an asymmetric, restricted decryption key |
| 37 | // NOTE: Needs to be restricted to have a symmetric value. |
| 38 | if( !CryptIsAsymAlgorithm(object->publicArea.type) |
| 39 | || object->publicArea.objectAttributes.decrypt == CLEAR |
| 40 | || object->publicArea.objectAttributes.restricted == CLEAR |
| 41 | ) |
| 42 | return TPM_RC_TYPE + RC_MakeCredential_handle; |
| 43 | |
| 44 | // The credential information may not be larger than the digest size used for |
| 45 | // the Name of the key associated with handle. |
| 46 | if(in->credential.t.size > CryptGetHashDigestSize(object->publicArea.nameAlg)) |
| 47 | return TPM_RC_SIZE + RC_MakeCredential_credential; |
| 48 | |
| 49 | // Command Output |
| 50 | |
| 51 | // Make encrypt key and its associated secret structure. |
| 52 | // Even though CrypeSecretEncrypt() may return |
ChromeOS Developer | e85c65b | 2015-07-10 10:12:43 -0700 | [diff] [blame] | 53 | out->secret.t.size = sizeof(out->secret.t.secret); |
Vadim Bendebury | 5679752 | 2015-05-20 10:32:25 -0700 | [diff] [blame] | 54 | result = CryptSecretEncrypt(in->handle, "IDENTITY", &data, &out->secret); |
| 55 | if(result != TPM_RC_SUCCESS) |
| 56 | return result; |
| 57 | |
| 58 | // Prepare output credential data from secret |
| 59 | SecretToCredential(&in->credential, &in->objectName, (TPM2B_SEED *) &data, |
| 60 | in->handle, &out->credentialBlob); |
| 61 | |
| 62 | return TPM_RC_SUCCESS; |
| 63 | } |