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 "RSA_Encrypt_fp.h" |
| 10 | #ifdef TPM_ALG_RSA |
| 11 | // |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_ATTRIBUTES decrypt attribute is not SET in key referenced by keyHandle |
| 16 | // TPM_RC_KEY keyHandle does not reference an RSA key |
| 17 | // TPM_RC_SCHEME incorrect input scheme, or the chosen scheme is not a valid RSA |
| 18 | // decrypt scheme |
| 19 | // TPM_RC_VALUE the numeric value of message is greater than the public modulus of |
| 20 | // the key referenced by keyHandle, or label is not a null-terminated |
| 21 | // string |
| 22 | // |
| 23 | TPM_RC |
| 24 | TPM2_RSA_Encrypt( |
| 25 | RSA_Encrypt_In *in, // IN: input parameter list |
| 26 | RSA_Encrypt_Out *out // OUT: output parameter list |
| 27 | ) |
| 28 | { |
| 29 | TPM_RC result; |
| 30 | OBJECT *rsaKey; |
| 31 | TPMT_RSA_DECRYPT *scheme; |
| 32 | char *label = NULL; |
| 33 | |
| 34 | // Input Validation |
| 35 | |
| 36 | rsaKey = ObjectGet(in->keyHandle); |
| 37 | |
| 38 | // selected key must be an RSA key |
| 39 | if(rsaKey->publicArea.type != TPM_ALG_RSA) |
| 40 | return TPM_RC_KEY + RC_RSA_Encrypt_keyHandle; |
| 41 | |
| 42 | // selected key must have the decryption attribute |
| 43 | if(rsaKey->publicArea.objectAttributes.decrypt != SET) |
| 44 | return TPM_RC_ATTRIBUTES + RC_RSA_Encrypt_keyHandle; |
| 45 | |
| 46 | // Is there a label? |
| 47 | if(in->label.t.size > 0) |
| 48 | { |
| 49 | // label is present, so make sure that is it NULL-terminated |
| 50 | if(in->label.t.buffer[in->label.t.size - 1] != 0) |
| 51 | return TPM_RC_VALUE + RC_RSA_Encrypt_label; |
| 52 | label = (char *)in->label.t.buffer; |
| 53 | } |
| 54 | |
| 55 | // Command Output |
| 56 | |
| 57 | // Select a scheme for encryption |
| 58 | scheme = CryptSelectRSAScheme(in->keyHandle, &in->inScheme); |
| 59 | if(scheme == NULL) |
| 60 | return TPM_RC_SCHEME + RC_RSA_Encrypt_inScheme; |
| 61 | |
| 62 | // Encryption. TPM_RC_VALUE, or TPM_RC_SCHEME errors my be returned buy |
| 63 | // CryptEncyptRSA. Note: It can also return TPM_RC_ATTRIBUTES if the key does |
| 64 | // not have the decrypt attribute but that was checked above. |
| 65 | out->outData.t.size = sizeof(out->outData.t.buffer); |
| 66 | result = CryptEncryptRSA(&out->outData.t.size, out->outData.t.buffer, rsaKey, |
| 67 | scheme, in->message.t.size, in->message.t.buffer, |
| 68 | label); |
| 69 | return result; |
| 70 | } |
| 71 | #endif |