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40
41 /*
42 //
43 // Purpose:
44 // Cryptography Primitive.
45 // RSA Functions
46 //
47 */
48
49 #include "owncp.h"
50 #include "pcpbn.h"
51 #include "pcpngrsa.h"
52 #include "pcpngrsamethod.h"
53
54
55 /* get default method based on CPU's features */
getDefaultMethod_RSA_public(int modulusBitSize)56 static gsMethod_RSA* getDefaultMethod_RSA_public(int modulusBitSize)
57 {
58 gsMethod_RSA* m;
59
60 #if(_IPP32E>=_IPP32E_K0)
61 m = IsFeatureEnabled(ippCPUID_AVX512IFMA) ? gsMethod_RSA_avx512_public() : gsMethod_RSA_avx2_public();
62 #elif(_IPP32E>=_IPP32E_L9)
63 m = gsMethod_RSA_avx2_public();
64 #elif(_IPP>=_IPP_W7)
65 m = gsMethod_RSA_sse2_public();
66 #else
67 m = gsMethod_RSA_gpr_public();
68 #endif
69
70 if (!(m->loModulusBisize <= modulusBitSize && modulusBitSize <= m->hiModulusBisize))
71 m = gsMethod_RSA_gpr_public();
72 return m;
73 }