File indexing completed on 2024-04-28 16:59:49

 /* This code is public-domain - it is based on libcrypt
  * placed in the public domain by Wei Dai and other contributors.
  */
 // gcc -Wall -DSHA1TEST -o sha1test sha1.c && ./sha1test
 
 #include <stdint.h>
 #include <string.h>
 
 /* This is the only section changed for dferry - apparently our endianness macro is exotic */
 #ifdef BIGENDIAN
 #define SHA_BIG_ENDIAN
 #endif
 
 /* header */
 
 #define HASH_LENGTH 20
 #define BLOCK_LENGTH 64
 
 typedef struct sha1nfo {
     uint32_t buffer[BLOCK_LENGTH/4];
     uint32_t state[HASH_LENGTH/4];
     uint32_t byteCount;
     uint8_t bufferOffset;
     uint8_t keyBuffer[BLOCK_LENGTH];
     uint8_t innerHash[HASH_LENGTH];
 } sha1nfo;
 
 /* public API - prototypes - TODO: doxygen*/
 
 /**
  */
 void sha1_init(sha1nfo *s);
 /**
  */
 void sha1_writebyte(sha1nfo *s, uint8_t data);
 /**
  */
 void sha1_write(sha1nfo *s, const char *data, size_t len);
 /**
  */
 uint8_t* sha1_result(sha1nfo *s);
 /**
  */
 void sha1_initHmac(sha1nfo *s, const uint8_t* key, int keyLength);
 /**
  */
 uint8_t* sha1_resultHmac(sha1nfo *s);
 
 
 /* code */
 #define SHA1_K0  0x5a827999
 #define SHA1_K20 0x6ed9eba1
 #define SHA1_K40 0x8f1bbcdc
 #define SHA1_K60 0xca62c1d6
 
 void sha1_init(sha1nfo *s) {
     s->state[0] = 0x67452301;
     s->state[1] = 0xefcdab89;
     s->state[2] = 0x98badcfe;
     s->state[3] = 0x10325476;
     s->state[4] = 0xc3d2e1f0;
     s->byteCount = 0;
     s->bufferOffset = 0;
 }
 
 uint32_t sha1_rol32(uint32_t number, uint8_t bits) {
     return ((number << bits) | (number >> (32-bits)));
 }
 
 void sha1_hashBlock(sha1nfo *s) {
     uint8_t i;
     uint32_t a,b,c,d,e,t;
 
     a=s->state[0];
     b=s->state[1];
     c=s->state[2];
     d=s->state[3];
     e=s->state[4];
     for (i=0; i<80; i++) {
         if (i>=16) {
             t = s->buffer[(i+13)&15] ^ s->buffer[(i+8)&15] ^ s->buffer[(i+2)&15] ^ s->buffer[i&15];
             s->buffer[i&15] = sha1_rol32(t,1);
         }
         if (i<20) {
             t = (d ^ (b & (c ^ d))) + SHA1_K0;
         } else if (i<40) {
             t = (b ^ c ^ d) + SHA1_K20;
         } else if (i<60) {
             t = ((b & c) | (d & (b | c))) + SHA1_K40;
         } else {
             t = (b ^ c ^ d) + SHA1_K60;
         }
         t+=sha1_rol32(a,5) + e + s->buffer[i&15];
         e=d;
         d=c;
         c=sha1_rol32(b,30);
         b=a;
         a=t;
     }
     s->state[0] += a;
     s->state[1] += b;
     s->state[2] += c;
     s->state[3] += d;
     s->state[4] += e;
 }
 
 void sha1_addUncounted(sha1nfo *s, uint8_t data) {
     uint8_t * const b = (uint8_t*) s->buffer;
 #ifdef SHA_BIG_ENDIAN
     b[s->bufferOffset] = data;
 #else
     b[s->bufferOffset ^ 3] = data;
 #endif
     s->bufferOffset++;
     if (s->bufferOffset == BLOCK_LENGTH) {
         sha1_hashBlock(s);
         s->bufferOffset = 0;
     }
 }
 
 void sha1_writebyte(sha1nfo *s, uint8_t data) {
     ++s->byteCount;
     sha1_addUncounted(s, data);
 }
 
 void sha1_write(sha1nfo *s, const char *data, size_t len) {
     for (;len--;) sha1_writebyte(s, (uint8_t) *data++);
 }
 
 void sha1_pad(sha1nfo *s) {
     // Implement SHA-1 padding (fips180-2 §5.1.1)
 
     // Pad with 0x80 followed by 0x00 until the end of the block
     sha1_addUncounted(s, 0x80);
     while (s->bufferOffset != 56) sha1_addUncounted(s, 0x00);
 
     // Append length in the last 8 bytes
     sha1_addUncounted(s, 0); // We're only using 32 bit lengths
     sha1_addUncounted(s, 0); // But SHA-1 supports 64 bit lengths
     sha1_addUncounted(s, 0); // So zero pad the top bits
     sha1_addUncounted(s, s->byteCount >> 29); // Shifting to multiply by 8
     sha1_addUncounted(s, s->byteCount >> 21); // as SHA-1 supports bitstreams as well as
     sha1_addUncounted(s, s->byteCount >> 13); // byte.
     sha1_addUncounted(s, s->byteCount >> 5);
     sha1_addUncounted(s, s->byteCount << 3);
 }
 
 uint8_t* sha1_result(sha1nfo *s) {
     // Pad to complete the last block
     sha1_pad(s);
 
 #ifndef SHA_BIG_ENDIAN
     // Swap byte order back
     int i;
     for (i=0; i<5; i++) {
         s->state[i]=
               (((s->state[i])<<24)& 0xff000000)
             | (((s->state[i])<<8) & 0x00ff0000)
             | (((s->state[i])>>8) & 0x0000ff00)
             | (((s->state[i])>>24)& 0x000000ff);
     }
 #endif
 
     // Return pointer to hash (20 characters)
     return (uint8_t*) s->state;
 }
 
 #define HMAC_IPAD 0x36
 #define HMAC_OPAD 0x5c
 
 void sha1_initHmac(sha1nfo *s, const uint8_t* key, int keyLength) {
     uint8_t i;
     memset(s->keyBuffer, 0, BLOCK_LENGTH);
     if (keyLength > BLOCK_LENGTH) {
         // Hash long keys
         sha1_init(s);
         for (;keyLength--;) sha1_writebyte(s, *key++);
         memcpy(s->keyBuffer, sha1_result(s), HASH_LENGTH);
     } else {
         // Block length keys are used as is
         memcpy(s->keyBuffer, key, keyLength);
     }
     // Start inner hash
     sha1_init(s);
     for (i=0; i<BLOCK_LENGTH; i++) {
         sha1_writebyte(s, s->keyBuffer[i] ^ HMAC_IPAD);
     }
 }
 
 uint8_t* sha1_resultHmac(sha1nfo *s) {
     uint8_t i;
     // Complete inner hash
     memcpy(s->innerHash,sha1_result(s),HASH_LENGTH);
     // Calculate outer hash
     sha1_init(s);
     for (i=0; i<BLOCK_LENGTH; i++) sha1_writebyte(s, s->keyBuffer[i] ^ HMAC_OPAD);
     for (i=0; i<HASH_LENGTH; i++) sha1_writebyte(s, s->innerHash[i]);
     return sha1_result(s);
 }
 
 /* self-test */
 
 #ifdef SHA1TEST
 #include <stdio.h>
 
 uint8_t hmacKey1[]={
     0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,
     0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,
     0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,
     0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
 };
 uint8_t hmacKey2[]={
     0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
     0x40,0x41,0x42,0x43
 };
 uint8_t hmacKey3[]={
     0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,
     0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
     0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,
     0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,
     0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,
     0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,
     0xb0,0xb1,0xb2,0xb3
 };
 uint8_t hmacKey4[]={
     0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,
     0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,
     0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,
     0xa0
 };
 
 void printHash(uint8_t* hash) {
     int i;
     for (i=0; i<20; i++) {
         printf("%02x", hash[i]);
     }
     printf("\n");
 }
 
 
 int main (int argc, char **argv) {
     uint32_t a;
     sha1nfo s;
 
     // SHA tests
     printf("Test: FIPS 180-2 C.1 and RFC3174 7.3 TEST1\n");
     printf("Expect:a9993e364706816aba3e25717850c26c9cd0d89d\n");
     printf("Result:");
     sha1_init(&s);
     sha1_write(&s, "abc", 3);
     printHash(sha1_result(&s));
     printf("\n\n");
 
     printf("Test: FIPS 180-2 C.2 and RFC3174 7.3 TEST2\n");
     printf("Expect:84983e441c3bd26ebaae4aa1f95129e5e54670f1\n");
     printf("Result:");
     sha1_init(&s);
     sha1_write(&s, "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56);
     printHash(sha1_result(&s));
     printf("\n\n");
 
     printf("Test: RFC3174 7.3 TEST4\n");
     printf("Expect:dea356a2cddd90c7a7ecedc5ebb563934f460452\n");
     printf("Result:");
     sha1_init(&s);
     for (a=0; a<80; a++) sha1_write(&s, "01234567", 8);
     printHash(sha1_result(&s));
     printf("\n\n");
 
     // HMAC tests
     printf("Test: FIPS 198a A.1\n");
     printf("Expect:4f4ca3d5d68ba7cc0a1208c9c61e9c5da0403c0a\n");
     printf("Result:");
     sha1_initHmac(&s, hmacKey1, 64);
     sha1_write(&s, "Sample #1",9);
     printHash(sha1_resultHmac(&s));
     printf("\n\n");
 
     printf("Test: FIPS 198a A.2\n");
     printf("Expect:0922d3405faa3d194f82a45830737d5cc6c75d24\n");
     printf("Result:");
     sha1_initHmac(&s, hmacKey2, 20);
     sha1_write(&s, "Sample #2", 9);
     printHash(sha1_resultHmac(&s));
     printf("\n\n");
 
     printf("Test: FIPS 198a A.3\n");
     printf("Expect:bcf41eab8bb2d802f3d05caf7cb092ecf8d1a3aa\n");
     printf("Result:");
     sha1_initHmac(&s, hmacKey3,100);
     sha1_write(&s, "Sample #3", 9);
     printHash(sha1_resultHmac(&s));
     printf("\n\n");
 
     printf("Test: FIPS 198a A.4\n");
     printf("Expect:9ea886efe268dbecce420c7524df32e0751a2a26\n");
     printf("Result:");
     sha1_initHmac(&s, hmacKey4,49);
     sha1_write(&s, "Sample #4", 9);
     printHash(sha1_resultHmac(&s));
     printf("\n\n");
 
     // Long tests
     printf("Test: FIPS 180-2 C.3 and RFC3174 7.3 TEST3\n");
     printf("Expect:34aa973cd4c4daa4f61eeb2bdbad27316534016f\n");
     printf("Result:");
     sha1_init(&s);
     for (a=0; a<1000000; a++) sha1_writebyte(&s, 'a');
     printHash(sha1_result(&s));
 
     return 0;
 }
 #endif /* self-test */