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You may 30 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 31 * 32 * 33 * Unless required by applicable law or agreed to in writing, software 34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 36 * 37 * See the License for the specific language governing permissions and 38 * limitations under the License. 39 *******************************************************************************/ 40 41 /* 42 // 43 // Purpose: 44 // Cryptography Primitive. 45 // EC over Prime Finite Field (setup/retrieve domain parameters) 46 // 47 // Contents: 48 // ippsECCPSet() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpeccp.h" 55 56 /*F* 57 // Name: ippsECCPInitStdSM2 58 // 59 // Purpose: Sets up the elliptic curve domain parameters 60 // over a prime finite field GF(p) 61 // 62 // Returns: Reason: 63 // ippStsNullPtrErr NULL == pPrime 64 // NULL == pA 65 // NULL == pB 66 // NULL == pGX 67 // NULL == pGY 68 // NULL == pOrder 69 // NULL == cofactor 70 // NULL == pEC 71 // 72 // ippStsContextMatchErr illegal pPrime->idCtx 73 // illegal pA->idCtx 74 // illegal pB->idCtx 75 // illegal pGX->idCtx 76 // illegal pGY->idCtx 77 // illegal pOrder->idCtx 78 // illegal pEC->idCtx 79 // 80 // ippStsRangeErr not enough room for: 81 // pPrime 82 // pA, pB, 83 // pGX, pGY 84 // pOrder 85 // 86 // ippStsNoErr no errors 87 // 88 // Parameters: 89 // pPrime pointer to the retrieval prime (specify FG(p)) 90 // pA pointer to the retrieval A coefficient of EC equation 91 // pB pointer to the retrieval B coefficient of EC equation 92 // pGX,pGY pointer to the retrieval Base Point (x and y coordinates) of EC 93 // pOrder pointer to the retrieval Base Point order 94 // cofactor pointer to the retrieval cofactor value 95 // pEC pointer to the ECC context 96 // 97 *F*/ 98 99 IPPFUN(IppStatus, ippsECCPSet, (const IppsBigNumState* pPrime, 100 const IppsBigNumState* pA, const IppsBigNumState* pB, 101 const IppsBigNumState* pGX,const IppsBigNumState* pGY, 102 const IppsBigNumState* pOrder, int cofactor, 103 IppsECCPState* pEC)) 104 { 105 /* test pEC */ 106 IPP_BAD_PTR1_RET(pEC); 107 /* use aligned EC context */ 108 pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); 109 IPP_BADARG_RET(!ECP_TEST_ID(pEC), ippStsContextMatchErr); 110 111 /* test pPrime */ 112 IPP_BAD_PTR1_RET(pPrime); 113 pPrime = (IppsBigNumState*)( IPP_ALIGNED_PTR(pPrime, BN_ALIGNMENT) ); 114 IPP_BADARG_RET(!BN_VALID_ID(pPrime), ippStsContextMatchErr); 115 IPP_BADARG_RET((cpBN_bitsize(pPrime)>GFP_FEBITLEN(GFP_PMA(ECP_GFP(pEC)))), ippStsRangeErr); 116 117 /* test pA and pB */ 118 IPP_BAD_PTR2_RET(pA,pB); 119 pA = (IppsBigNumState*)( IPP_ALIGNED_PTR(pA, ALIGN_VAL) ); 120 pB = (IppsBigNumState*)( IPP_ALIGNED_PTR(pB, ALIGN_VAL) ); 121 IPP_BADARG_RET(!BN_VALID_ID(pA), ippStsContextMatchErr); 122 IPP_BADARG_RET(!BN_VALID_ID(pB), ippStsContextMatchErr); 123 IPP_BADARG_RET(BN_NEGATIVE(pA) || 0<=cpBN_cmp(pA,pPrime), ippStsRangeErr); 124 IPP_BADARG_RET(BN_NEGATIVE(pB) || 0<=cpBN_cmp(pB,pPrime), ippStsRangeErr); 125 126 /* test pG and pGorder pointers */ 127 IPP_BAD_PTR3_RET(pGX,pGY, pOrder); 128 pGX = (IppsBigNumState*)( IPP_ALIGNED_PTR(pGX, ALIGN_VAL) ); 129 pGY = (IppsBigNumState*)( IPP_ALIGNED_PTR(pGY, ALIGN_VAL) ); 130 pOrder = (IppsBigNumState*)( IPP_ALIGNED_PTR(pOrder, ALIGN_VAL) ); 131 IPP_BADARG_RET(!BN_VALID_ID(pGX), ippStsContextMatchErr); 132 IPP_BADARG_RET(!BN_VALID_ID(pGY), ippStsContextMatchErr); 133 IPP_BADARG_RET(!BN_VALID_ID(pOrder), ippStsContextMatchErr); 134 IPP_BADARG_RET(BN_NEGATIVE(pGX) || 0<=cpBN_cmp(pGX,pPrime), ippStsRangeErr); 135 IPP_BADARG_RET(BN_NEGATIVE(pGY) || 0<=cpBN_cmp(pGY,pPrime), ippStsRangeErr); 136 IPP_BADARG_RET((cpBN_bitsize(pOrder)>ECP_ORDBITSIZE(pEC)), ippStsRangeErr); 137 138 /* test cofactor */ 139 IPP_BADARG_RET(!(0<cofactor), ippStsRangeErr); 140 141 return ECCPSetDP(ippsGFpMethod_pArb(), 142 BN_SIZE(pPrime), BN_NUMBER(pPrime), 143 BN_SIZE(pA), BN_NUMBER(pA), 144 BN_SIZE(pB), BN_NUMBER(pB), 145 BN_SIZE(pGX), BN_NUMBER(pGX), 146 BN_SIZE(pGY), BN_NUMBER(pGY), 147 BN_SIZE(pOrder), BN_NUMBER(pOrder), 148 (BNU_CHUNK_T)cofactor, 149 pEC); 150 } 151