hashmd5

PURPOSE

SYNOPSIS

DESCRIPTION

 Computes the MD5 hash of input data.

 function h = hashmd5(inp)
 
 Returns a string containing the MD5 hash of the input variable. The input
 variable may be of any class that can be typecast to uint8 format, which
 is fairly non-restrictive.

CROSS-REFERENCE INFORMATION

• complexcirclefactory Returns a manifold struct to optimize over unit-modulus complex numbers.
• realphasefactory Returns a manifold struct to optimize over phases of fft's of real signals
• essentialfactory Manifold structure to optimize over the space of essential matrices.
• centeredmatrixfactory Linear manifold struct. for optimization over matrices with centered cols
• euclideancomplexfactory Returns a manifold struct to optimize over complex matrices.
• euclideanfactory Returns a manifold struct to optimize over real matrices.
• euclideansparsefactory Returns a manifold struct to optimize over real matrices with given sparsity pattern.
• shapefitfactory Linear manifold structure for optimization over the ShapeFit search space
• skewsymmetricfactory Returns a manifold struct to optimize over k skew-symmetric matrices of size n
• symmetricfactory Returns a manifold struct to optimize over k symmetric matrices of size n
• fixedrankMNquotientfactory Manifold of m-by-n matrices of rank k with two factor quotient geometry.
• fixedrankembeddedfactory Manifold struct to optimize fixed-rank matrices w/ an embedded geometry.
• fixedrankfactory_2factors Manifold of m-by-n matrices of rank k with balanced quotient geometry.
• fixedrankfactory_2factors_preconditioned Manifold of m-by-n matrices of rank k with two factor quotient geometry.
• fixedrankfactory_2factors_subspace_projection Manifold of m-by-n matrices of rank k with two factor quotient geometry.
• fixedrankfactory_3factors Manifold of m-by-n matrices of rank k with polar quotient geometry.
• fixedrankfactory_3factors_preconditioned Manifold of m-by-n matrices of rank k with three factor quotient geometry.
• fixedrankfactory_tucker_preconditioned Manifold of fixed multilinear rank tensors in Tucker format.
• fixedranktensorembeddedfactory Manifold of tensors with fixed multilinear rank in Tucker format
• grassmanncomplexfactory Returns a manifold struct to optimize over the set of subspaces in C^n.
• grassmannfactory Returns a manifold struct to optimize over the space of vector subspaces.
• grassmanngeneralizedfactory Returns a manifold struct of "scaled" vector subspaces.
• hyperbolicfactory Factory for matrices whose columns live on the hyperbolic manifold
• poincareballfactory Factory for matrices whose columns live in the Poincare ball manifold
• multinomialdoublystochasticfactory Manifold of n-by-n doubly-stochastic matrices with positive entries.
• multinomialdoublystochasticgeneralfactory Manifold of n-by-m postive matrices such that row sum is p and column sum is q.
• multinomialfactory Manifold of n-by-m column-stochastic matrices with positive entries.
• multinomialsymmetricfactory Manifold of n-by-n symmetric stochastic matrices with positive entries.
• obliquecomplexfactory Returns a manifold struct defining complex matrices w/ unit-norm columns.
• obliquefactory Returns a manifold struct to optimize over matrices w/ unit-norm columns.
• positivefactory Manifold of m-by-n matrices with positive entries; scale invariant metric
• rotationsfactory Returns a manifold structure to optimize over rotation matrices.
• unitaryfactory Returns a manifold structure to optimize over unitary matrices.
• spherecomplexfactory Returns a manifold struct to optimize over unit-norm complex matrices.
• spherefactory Returns a manifold struct to optimize over unit-norm vectors or matrices.
• spheresymmetricfactory Returns a manifold struct to optimize over unit-norm symmetric matrices.
• stiefelcomplexfactory Returns a manifold struct. to optimize over complex orthonormal matrices.
• stiefelfactory Returns a manifold structure to optimize over orthonormal matrices.
• stiefelgeneralizedfactory Returns a manifold structure of "scaled" orthonormal matrices.
• stiefelstackedfactory Stiefel(k, d)^m, represented as matrices of size m*d-by-k.
• elliptopefactory Manifold of n-by-n psd matrices of rank k with unit diagonal elements.
• spectrahedronfactory Manifold of n-by-n symmetric positive semidefinite matrices of rank k
• symfixedrankYYcomplexfactory Manifold of n x n complex Hermitian pos. semidefinite matrices of rank k.
• symfixedrankYYfactory Manifold of n-by-n symmetric positive semidefinite matrices of rank k.
• sympositivedefiniteBWfactory Manifold of n-by-n symmetric positive definite matrices with the
• sympositivedefinitefactory Manifold of n-by-n symmetric positive definite matrices with
• sympositivedefinitesimplexcomplexfactory Manifold of k product of n-by-n Hermitian positive definite matrices
• sympositivedefinitesimplexfactory with the bi-invariant geometry such that the sum is the identity matrix.
• powermanifold Returns a structure describing a power manifold M^n = M x M x ... x M.
• productmanifold Returns a structure describing a product manifold M = M1 x M2 x ... x Mn.
• tangentspacefactory Returns a manifold structure representing the tangent space to M at x.
• tangentspherefactory Returns a manifold struct. for the sphere on the tangent space to M at x.

SOURCE CODE

0001 function h = hashmd5(inp)
0002 % Computes the MD5 hash of input data.
0003 %
0004 % function h = hashmd5(inp)
0005 %
0006 % Returns a string containing the MD5 hash of the input variable. The input
0007 % variable may be of any class that can be typecast to uint8 format, which
0008 % is fairly non-restrictive.
0009 
0010 % This file is part of Manopt: www.manopt.org.
0011 % This code is a stripped version of more general hashing code by
0012 % Michael Kleder, Nov 2005.
0013 % Change log:
0014 %
0015 %   Aug. 8, 2013 (NB):
0016 %       Made x a static (persistent) variable, in the hope it will speed
0017 %       it up. Furthermore, the function is now Octave compatible.
0018 
0019     is_octave = exist('OCTAVE_VERSION', 'builtin');
0020         
0021     persistent x;
0022     if isempty(x) && ~is_octave
0023         x = java.security.MessageDigest.getInstance('MD5');
0024     end
0025 
0026     inp=inp(:);
0027     % Convert strings and logicals into uint8 format
0028     if ischar(inp) || islogical(inp)
0029         inp=uint8(inp);
0030     else % Convert everything else into uint8 format without loss of data
0031         inp=typecast(inp,'uint8');
0032     end
0033     
0034     % Create hash
0035     if ~is_octave
0036         x.update(inp);
0037         h = typecast(x.digest, 'uint8');
0038         h = dec2hex(h)';
0039         % Remote possibility: all hash bytes < 128, so pad:
0040         if(size(h,1))==1
0041             h = [repmat('0',[1 size(h,2)]);h];
0042         end
0043         h = lower(h(:)');
0044     else
0045         h = md5sum(char(inp'), true);
0046     end
0047     
0048 end