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[/] [sha_core/] [trunk/] [src/] [mrshs512.c] - Rev 6
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/* * Implementation of the Secure Hashing Algorithm (SHA-384 and SHA-512) * * Generates a a 384 or 512 bit message digest. It should be impossible to come * come up with two messages that hash to the same value ("collision free"). * * For use with byte-oriented messages only. Could/Should be speeded * up by unwinding loops in shs_transform(), and assembly patches. * * NOTE: This requires a 64-bit integer type to be defined */ #include <stdio.h> #include "miracl.h" #ifdef mr_unsign64 #define H0 0x6a09e667f3bcc908 #define H1 0xbb67ae8584caa73b #define H2 0x3c6ef372fe94f82b #define H3 0xa54ff53a5f1d36f1 #define H4 0x510e527fade682d1 #define H5 0x9b05688c2b3e6c1f #define H6 0x1f83d9abfb41bd6b #define H7 0x5be0cd19137e2179 #define H8 0xcbbb9d5dc1059ed8 #define H9 0x629a292a367cd507 #define HA 0x9159015a3070dd17 #define HB 0x152fecd8f70e5939 #define HC 0x67332667ffc00b31 #define HD 0x8eb44a8768581511 #define HE 0xdb0c2e0d64f98fa7 #define HF 0x47b5481dbefa4fa4 static mr_unsign64 K[80]={ 0x428a2f98d728ae22,0x7137449123ef65cd,0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc, 0x3956c25bf348b538,0x59f111f1b605d019,0x923f82a4af194f9b,0xab1c5ed5da6d8118, 0xd807aa98a3030242,0x12835b0145706fbe,0x243185be4ee4b28c,0x550c7dc3d5ffb4e2, 0x72be5d74f27b896f,0x80deb1fe3b1696b1,0x9bdc06a725c71235,0xc19bf174cf692694, 0xe49b69c19ef14ad2,0xefbe4786384f25e3,0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65, 0x2de92c6f592b0275,0x4a7484aa6ea6e483,0x5cb0a9dcbd41fbd4,0x76f988da831153b5, 0x983e5152ee66dfab,0xa831c66d2db43210,0xb00327c898fb213f,0xbf597fc7beef0ee4, 0xc6e00bf33da88fc2,0xd5a79147930aa725,0x06ca6351e003826f,0x142929670a0e6e70, 0x27b70a8546d22ffc,0x2e1b21385c26c926,0x4d2c6dfc5ac42aed,0x53380d139d95b3df, 0x650a73548baf63de,0x766a0abb3c77b2a8,0x81c2c92e47edaee6,0x92722c851482353b, 0xa2bfe8a14cf10364,0xa81a664bbc423001,0xc24b8b70d0f89791,0xc76c51a30654be30, 0xd192e819d6ef5218,0xd69906245565a910,0xf40e35855771202a,0x106aa07032bbd1b8, 0x19a4c116b8d2d0c8,0x1e376c085141ab53,0x2748774cdf8eeb99,0x34b0bcb5e19b48a8, 0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb,0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3, 0x748f82ee5defb2fc,0x78a5636f43172f60,0x84c87814a1f0ab72,0x8cc702081a6439ec, 0x90befffa23631e28,0xa4506cebde82bde9,0xbef9a3f7b2c67915,0xc67178f2e372532b, 0xca273eceea26619c,0xd186b8c721c0c207,0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178, 0x06f067aa72176fba,0x0a637dc5a2c898a6,0x113f9804bef90dae,0x1b710b35131c471b, 0x28db77f523047d84,0x32caab7b40c72493,0x3c9ebe0a15c9bebc,0x431d67c49c100d4c, 0x4cc5d4becb3e42b6,0x597f299cfc657e2a,0x5fcb6fab3ad6faec,0x6c44198c4a475817}; #define PAD 0x80 #define ZERO 0 /* functions */ #define S(n,x) (((x)>>n) | ((x)<<(64-n))) #define R(n,x) ((x)>>n) #define Ch(x,y,z) ((x&y)^(~(x)&z)) #define Maj(x,y,z) ((x&y)^(x&z)^(y&z)) #define Sig0(x) (S(28,x)^S(34,x)^S(39,x)) #define Sig1(x) (S(14,x)^S(18,x)^S(41,x)) #define theta0(x) (S(1,x)^S(8,x)^R(7,x)) #define theta1(x) (S(19,x)^S(61,x)^R(6,x)) static void shs_transform(sha512 *sh) { /* basic transformation step */ mr_unsign64 a,b,c,d,e,f,g,h,t1,t2; int j; for (j=16;j<80;j++) sh->w[j]=theta1(sh->w[j-2])+sh->w[j-7]+theta0(sh->w[j-15])+sh->w[j-16]; a=sh->h[0]; b=sh->h[1]; c=sh->h[2]; d=sh->h[3]; e=sh->h[4]; f=sh->h[5]; g=sh->h[6]; h=sh->h[7]; for (j=0;j<80;j++) { /* 80 times - mush it up */ t1=h+Sig1(e)+Ch(e,f,g)+K[j]+sh->w[j]; t2=Sig0(a)+Maj(a,b,c); h=g; g=f; f=e; e=d+t1; d=c; c=b; b=a; a=t1+t2; } sh->h[0]+=a; sh->h[1]+=b; sh->h[2]+=c; sh->h[3]+=d; sh->h[4]+=e; sh->h[5]+=f; sh->h[6]+=g; sh->h[7]+=h; } void shs512_init(sha512 *sh) { /* re-initialise */ int i; for (i=0;i<80;i++) sh->w[i]=0; sh->length[0]=sh->length[1]=0; sh->h[0]=H0; sh->h[1]=H1; sh->h[2]=H2; sh->h[3]=H3; sh->h[4]=H4; sh->h[5]=H5; sh->h[6]=H6; sh->h[7]=H7; } void shs384_init(sha384 *sh) { /* re-initialise */ int i; for (i=0;i<80;i++) sh->w[i]=0; sh->length[0]=sh->length[1]=0; sh->h[0]=H8; sh->h[1]=H9; sh->h[2]=HA; sh->h[3]=HB; sh->h[4]=HC; sh->h[5]=HD; sh->h[6]=HE; sh->h[7]=HF; } void shs512_process(sha512 *sh,int byte) { /* process the next message byte */ int cnt; cnt=(int)((sh->length[0]/64)%16); sh->w[cnt]<<=8; sh->w[cnt]|=(mr_unsign64)(byte&0xFF); sh->length[0]+=8; if (sh->length[0]==0L) { sh->length[1]++; sh->length[0]=0L; } if ((sh->length[0]%1024)==0) shs_transform(sh); } void shs384_process(sha384 *sh,int byte) { /* process the next message byte */ int cnt; cnt=(int)((sh->length[0]/64)%16); sh->w[cnt]<<=8; sh->w[cnt]|=(mr_unsign64)(byte&0xFF); sh->length[0]+=8; if (sh->length[0]==0L) { sh->length[1]++; sh->length[0]=0L; } if ((sh->length[0]%1024)==0) shs_transform(sh); } void shs512_hash(sha512 *sh,char hash[64]) { /* pad message and finish - supply digest */ int i; mr_unsign64 len0,len1; len0=sh->length[0]; len1=sh->length[1]; shs512_process(sh,PAD); while ((sh->length[0]%1024)!=896) shs512_process(sh,ZERO); sh->w[14]=len1; sh->w[15]=len0; shs_transform(sh); for (i=0;i<64;i++) { /* convert to bytes */ hash[i]=(char)((sh->h[i/8]>>(8*(7-i%8))) & 0xffL); } shs512_init(sh); } void shs384_hash(sha384 *sh,char hash[48]) { /* pad message and finish - supply digest */ int i; mr_unsign64 len0,len1; len0=sh->length[0]; len1=sh->length[1]; shs512_process(sh,PAD); while ((sh->length[0]%1024)!=896) shs384_process(sh,ZERO); sh->w[14]=len1; sh->w[15]=len0; shs_transform(sh); for (i=0;i<48;i++) { /* convert to bytes */ hash[i]=(char)((sh->h[i/8]>>(8*(7-i%8))) & 0xffL); } shs384_init(sh); } #endif /* test program: should produce digests 512 bit 8e959b75dae313da 8cf4f72814fc143f 8f7779c6eb9f7fa1 7299aeadb6889018 501d289e4900f7e4 331b99dec4b5433a c7d329eeb6dd2654 5e96e55b874be909 384 bit 09330c33f71147e8 3d192fc782cd1b47 53111b173b3b05d2 2fa08086e3b0f712 fcc7c71a557e2db9 66c3e9fa91746039 #include <stdio.h> #include "miracl.h" char test[]="abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"; int main() { char hash[64]; int i; sha512 sh; shs512_init(&sh); for (i=0;test[i]!=0;i++) shs512_process(&sh,test[i]); shs512_hash(&sh,hash); for (i=0;i<64;i++) printf("%02x",(unsigned char)hash[i]); printf("\n"); shs384_init(&sh); for (i=0;test[i]!=0;i++) shs384_process(&sh,test[i]); shs384_hash(&sh,hash); for (i=0;i<48;i++) printf("%02x",(unsigned char)hash[i]); printf("\n"); return 0; } */
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