/* ############################################################################### # # Temboo Arduino library # # Copyright 2017, Temboo Inc. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, # either express or implied. See the License for the specific # language governing permissions and limitations under the License. # ############################################################################### */ #include #include #include "tmbmd5.h" static const uint8_t Worder[64] PROGMEM = { 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 1,6,11,0,5,10,15,4,9,14,3,8,13,2,7,12, 5,8,11,14,1,4,7,10,13,0,3,6,9,12,15,2, 0,7,14,5,12,3,10,1,8,15,6,13,4,11,2,9 }; static const uint8_t Rorder[64] PROGMEM = { 7,12,17,22,7,12,17,22,7,12,17,22,7,12,17,22, 5,9,14,20,5,9,14,20,5,9,14,20,5,9,14,20, 4,11,16,23,4,11,16,23,4,11,16,23,4,11,16,23, 6,10,15,21,6,10,15,21,6,10,15,21,6,10,15,21 }; static const uint32_t Korder[64] PROGMEM = { 0xd76aa478UL, 0xe8c7b756UL, 0x242070dbUL, 0xc1bdceeeUL, 0xf57c0fafUL, 0x4787c62aUL, 0xa8304613UL, 0xfd469501UL, 0x698098d8UL, 0x8b44f7afUL, 0xffff5bb1UL, 0x895cd7beUL, 0x6b901122UL, 0xfd987193UL, 0xa679438eUL, 0x49b40821UL, 0xf61e2562UL, 0xc040b340UL, 0x265e5a51UL, 0xe9b6c7aaUL, 0xd62f105dUL, 0x02441453UL, 0xd8a1e681UL, 0xe7d3fbc8UL, 0x21e1cde6UL, 0xc33707d6UL, 0xf4d50d87UL, 0x455a14edUL, 0xa9e3e905UL, 0xfcefa3f8UL, 0x676f02d9UL, 0x8d2a4c8aUL, 0xfffa3942UL, 0x8771f681UL, 0x6d9d6122UL, 0xfde5380cUL, 0xa4beea44UL, 0x4bdecfa9UL, 0xf6bb4b60UL, 0xbebfbc70UL, 0x289b7ec6UL, 0xeaa127faUL, 0xd4ef3085UL, 0x04881d05UL, 0xd9d4d039UL, 0xe6db99e5UL, 0x1fa27cf8UL, 0xc4ac5665UL, 0xf4292244UL, 0x432aff97UL, 0xab9423a7UL, 0xfc93a039UL, 0x655b59c3UL, 0x8f0ccc92UL, 0xffeff47dUL, 0x85845dd1UL, 0x6fa87e4fUL, 0xfe2ce6e0UL, 0xa3014314UL, 0x4e0811a1UL, 0xf7537e82UL, 0xbd3af235UL, 0x2ad7d2bbUL, 0xeb86d391UL }; MD5::MD5() { init(); } void MD5::init() { m_state[0] = 0x67452301UL; m_state[1] = 0xefcdab89UL; m_state[2] = 0x98badcfeUL; m_state[3] = 0x10325476UL; m_bufLength = 0; m_msgLengthBits = 0; } int MD5::compress(const uint8_t* buf) { uint32_t a; uint32_t b; uint32_t c; uint32_t d; uint32_t i; uint32_t W[16]; uint32_t t; // Copy data into W[0..15] in an endian-agnostic way for (i = 0; i < 16; i++) { W[i] = ((uint32_t)(buf[3])) << 24 | ((uint32_t)(buf[2])) << 16 | ((uint32_t)(buf[1])) << 8 | ((uint32_t)(buf[0])); buf += 4; } // copy current state a = m_state[0]; b = m_state[1]; c = m_state[2]; d = m_state[3]; for (i = 0; i < 16; ++i) { FF(&a,b,c,d,W[pgm_read_byte(&Worder[i])],pgm_read_byte(&Rorder[i]),pgm_read_dword(&Korder[i])); t = d; d = c; c = b; b = a; a = t; } for (; i < 32; ++i) { GG(&a,b,c,d,W[pgm_read_byte(&Worder[i])],pgm_read_byte(&Rorder[i]),pgm_read_dword(&Korder[i])); t = d; d = c; c = b; b = a; a = t; } for (; i < 48; ++i) { HH(&a,b,c,d,W[pgm_read_byte(&Worder[i])],pgm_read_byte(&Rorder[i]),pgm_read_dword(&Korder[i])); t = d; d = c; c = b; b = a; a = t; } for (; i < 64; ++i) { II(&a,b,c,d,W[pgm_read_byte(&Worder[i])],pgm_read_byte(&Rorder[i]),pgm_read_dword(&Korder[i])); t = d; d = c; c = b; b = a; a = t; } m_state[0] = m_state[0] + a; m_state[1] = m_state[1] + b; m_state[2] = m_state[2] + c; m_state[3] = m_state[3] + d; return MD5::MD5_OK; } int MD5::process (const uint8_t* msg, uint32_t msgLengthBytes) { uint32_t n; int err; if (m_bufLength >= sizeof(m_buf)) { return MD5::MD5_INVALID_ARG; } while (msgLengthBytes > 0) { // Process the input msg in 64 byte chunks if (m_bufLength == 0 && msgLengthBytes >= 64) { err = compress (msg); if (err != MD5::MD5_OK) { return err; } m_msgLengthBits += 64 * 8; msg += 64; msgLengthBytes -= 64; } else { n = 64 - m_bufLength; if (msgLengthBytes < n) { n = msgLengthBytes; } memcpy(m_buf + m_bufLength, msg, (size_t)n); m_bufLength += n; msg += n; msgLengthBytes -= n; if (m_bufLength == 64) { err = compress (m_buf); if (err != MD5::MD5_OK) { return err; } m_msgLengthBits += 64 * 8; m_bufLength = 0; } } } return MD5::MD5_OK; } int MD5::finish(uint8_t* out) { int i; if (m_bufLength >= sizeof(m_buf)) { return MD5::MD5_INVALID_ARG; } m_msgLengthBits += m_bufLength * 8; // append a '1' bit (right-padded with zeros) m_buf[m_bufLength++] = (uint8_t)0x80; // if the bufLength is > 56 bytes, pad with zeros then compress. // Then fall back to padding with zeros and length encoding like normal. if (m_bufLength > 56) { while (m_bufLength < 64) { m_buf[m_bufLength++] = (uint8_t)0; } compress(m_buf); m_bufLength = 0; } // pad with zeroes up to 56 bytes. // (Why 56? because we store the 8-byte length at the end.) // (What if bufLength == 56? Perfect! No padding prior to 8-byte length needed.) while (m_bufLength < 56) { m_buf[m_bufLength++] = (uint8_t)0; } // add the length in an endian-agnostic way m_buf[56] = (uint8_t)((m_msgLengthBits ) & 255); m_buf[57] = (uint8_t)((m_msgLengthBits >> 8) & 255); m_buf[58] = (uint8_t)((m_msgLengthBits >> 16) & 255); m_buf[59] = (uint8_t)((m_msgLengthBits >> 24) & 255); m_buf[60] = (uint8_t)((m_msgLengthBits >> 32) & 255); m_buf[61] = (uint8_t)((m_msgLengthBits >> 40) & 255); m_buf[62] = (uint8_t)((m_msgLengthBits >> 48) & 255); m_buf[63] = (uint8_t)((m_msgLengthBits >> 56) & 255); compress(m_buf); // copy the state to the output in an endian-agnostic way for (i = 0; i < 4; i++) { out[0] = m_state[i] & 255; out[1] = (m_state[i] >> 8) & 255; out[2] = (m_state[i] >> 16) & 255; out[3] = (m_state[i] >> 24) & 255; out += 4; } return MD5::MD5_OK; }