tlslite.utils.cryptomath module

cryptomath module

This module has basic math/crypto code.

tlslite.utils.cryptomath.HKDF_expand(PRK, info, L, algorithm)
tlslite.utils.cryptomath.HMAC_MD5(k, b)
tlslite.utils.cryptomath.HMAC_SHA1(k, b)
tlslite.utils.cryptomath.HMAC_SHA256(k, b)
tlslite.utils.cryptomath.HMAC_SHA384(k, b)
tlslite.utils.cryptomath.MD5(b)

Return a MD5 digest of data

tlslite.utils.cryptomath.SHA1(b)

Return a SHA1 digest of data

tlslite.utils.cryptomath.bytesToNumber(b, endian='big')

Convert a number stored in bytearray to an integer.

By default assumes big-endian encoding of the number.

tlslite.utils.cryptomath.divceil(divident, divisor)

Integer division with rounding up

tlslite.utils.cryptomath.gcd(a, b)
tlslite.utils.cryptomath.getRandomBytes(howMany)
tlslite.utils.cryptomath.getRandomNumber(low, high)
tlslite.utils.cryptomath.getRandomPrime(bits, display=False)
tlslite.utils.cryptomath.getRandomSafePrime(bits, display=False)
tlslite.utils.cryptomath.invMod(a, b)
tlslite.utils.cryptomath.isPrime(n, iterations=5, display=False, sieve=[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997])
tlslite.utils.cryptomath.lcm(a, b)
tlslite.utils.cryptomath.makeSieve(n)
tlslite.utils.cryptomath.mpiToNumber(mpi)
tlslite.utils.cryptomath.numBits(n)

Return number of bits necessary to represent the integer in binary

tlslite.utils.cryptomath.numBytes(n)

Return number of bytes necessary to represent the integer in bytes

tlslite.utils.cryptomath.numberToByteArray(n, howManyBytes=None, endian='big')

Convert an integer into a bytearray, zero-pad to howManyBytes.

The returned bytearray may be smaller than howManyBytes, but will not be larger. The returned bytearray will contain a big- or little-endian encoding of the input integer (n). Big endian encoding is used by default.

tlslite.utils.cryptomath.numberToMPI(n)
tlslite.utils.cryptomath.powMod(base, power, modulus)
tlslite.utils.cryptomath.secureHMAC(k, b, algorithm)

Return a HMAC using b and k using algorithm

tlslite.utils.cryptomath.secureHash(data, algorithm)

Return a digest of data using algorithm