| 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 "Attest_spt_fp.h" |
| 10 | #include "Quote_fp.h" |
| 11 | // |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_KEY signHandle does not reference a signing key; |
| 16 | // TPM_RC_SCHEME the scheme is not compatible with sign key type, or input scheme is |
| 17 | // not compatible with default scheme, or the chosen scheme is not a |
| 18 | // valid sign scheme |
| 19 | // |
| 20 | TPM_RC |
| 21 | TPM2_Quote( |
| 22 | Quote_In *in, // IN: input parameter list |
| 23 | Quote_Out *out // OUT: output parameter list |
| 24 | ) |
| 25 | { |
| 26 | TPM_RC result; |
| 27 | TPMI_ALG_HASH hashAlg; |
| 28 | TPMS_ATTEST quoted; |
| 29 | |
| 30 | // Command Output |
| 31 | |
| 32 | // Filling in attest information |
| 33 | // Common fields |
| 34 | // FillInAttestInfo may return TPM_RC_SCHEME or TPM_RC_KEY |
| 35 | result = FillInAttestInfo(in->signHandle, |
| 36 | &in->inScheme, |
| 37 | &in->qualifyingData, |
| 38 | "ed); |
| 39 | if(result != TPM_RC_SUCCESS) |
| 40 | { |
| 41 | if(result == TPM_RC_KEY) |
| 42 | return TPM_RC_KEY + RC_Quote_signHandle; |
| 43 | else |
| 44 | return RcSafeAddToResult(result, RC_Quote_inScheme); |
| 45 | } |
| 46 | |
| 47 | // Quote specific fields |
| 48 | // Attestation type |
| 49 | quoted.type = TPM_ST_ATTEST_QUOTE; |
| 50 | |
| 51 | // Get hash algorithm in sign scheme. This hash algorithm is used to |
| 52 | // compute PCR digest. If there is no algorithm, then the PCR cannot |
| 53 | // be digested and this command returns TPM_RC_SCHEME |
| 54 | hashAlg = in->inScheme.details.any.hashAlg; |
| 55 | |
| 56 | if(hashAlg == TPM_ALG_NULL) |
| 57 | return TPM_RC_SCHEME + RC_Quote_inScheme; |
| 58 | |
| 59 | // Compute PCR digest |
| 60 | PCRComputeCurrentDigest(hashAlg, |
| 61 | &in->PCRselect, |
| 62 | "ed.attested.quote.pcrDigest); |
| 63 | |
| 64 | // Copy PCR select. "PCRselect" is modified in PCRComputeCurrentDigest |
| 65 | // function |
| 66 | quoted.attested.quote.pcrSelect = in->PCRselect; |
| 67 | |
| 68 | // Sign attestation structure. A NULL signature will be returned if |
| 69 | // signHandle is TPM_RH_NULL. TPM_RC_VALUE, TPM_RC_SCHEME or TPM_RC_ATTRIBUTES |
| 70 | // error may be returned by SignAttestInfo. |
| 71 | // NOTE: TPM_RC_ATTRIBUTES means that the key is not a signing key but that |
| 72 | // was checked above and TPM_RC_KEY was returned. TPM_RC_VALUE means that the |
| 73 | // value to sign is too large but that means that the digest is too big and |
| 74 | // that can't happen. |
| 75 | result = SignAttestInfo(in->signHandle, |
| 76 | &in->inScheme, |
| 77 | "ed, |
| 78 | &in->qualifyingData, |
| 79 | &out->quoted, |
| 80 | &out->signature); |
| 81 | if(result != TPM_RC_SUCCESS) |
| 82 | return result; |
| 83 | |
| 84 | // orderly state should be cleared because of the reporting of clock info |
| 85 | // if signing happens |
| 86 | if(in->signHandle != TPM_RH_NULL) |
| 87 | g_clearOrderly = TRUE; |
| 88 | |
| 89 | return TPM_RC_SUCCESS; |
| 90 | } |