http://www.perlmonks.org?node_id=788929


in reply to Re^3: MD5 -- not digest::md5
in thread MD5 -- not digest::md5

From the the code in the RFC you cited:

context->state[0] = 0x67452301; context->state[1] = 0xefcdab89; context->state[2] = 0x98badcfe; context->state[3] = 0x10325476;

These numbers look pretty much identical to the ones in the Perl code in the OP to me.