1 /* ----------------------------------------------------------------------------
\r
2 * ATMEL Microcontroller Software Support
\r
3 * ----------------------------------------------------------------------------
\r
4 * Copyright (c) 2008, Atmel Corporation
\r
6 * All rights reserved.
\r
8 * Redistribution and use in source and binary forms, with or without
\r
9 * modification, are permitted provided that the following conditions are met:
\r
11 * - Redistributions of source code must retain the above copyright notice,
\r
12 * this list of conditions and the disclaimer below.
\r
14 * Atmel's name may not be used to endorse or promote products derived from
\r
15 * this software without specific prior written permission.
\r
17 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
\r
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
\r
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
\r
20 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
\r
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
\r
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
\r
23 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
\r
24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
\r
25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
\r
26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\r
27 * ----------------------------------------------------------------------------
\r
31 #define trace_LEVEL 1
\r
34 //------------------------------------------------------------------------------
\r
36 //------------------------------------------------------------------------------
\r
40 #include <utility/assert.h>
\r
41 #include <utility/trace.h>
\r
43 //------------------------------------------------------------------------------
\r
45 //------------------------------------------------------------------------------
\r
47 //------------------------------------------------------------------------------
\r
48 /// Configures the triple-DES peripheral to cipher/decipher, use single-DES or
\r
49 /// triple-DES, use two or three keys (when in triple-DES mode), start manually,
\r
50 /// automatically or via the PDC and use the given operating mode (ECB, CBC,
\r
52 /// \param cipher Encrypts if 1, decrypts if 0.
\r
53 /// \param tdesmod Single- or triple-DES mode.
\r
54 /// \param keymod Use two or three keys (must be 0 in single-DES mode).
\r
55 /// \param smod Start mode.
\r
56 /// \param opmod Encryption/decryption mode.
\r
57 //------------------------------------------------------------------------------
\r
58 void TDES_Configure(
\r
59 unsigned char cipher,
\r
60 unsigned int tdesmod,
\r
61 unsigned int keymod,
\r
65 trace_LOG(trace_DEBUG, "-D- TDES_Configure()\n\r");
\r
66 SANITY_CHECK((cipher & 0xFFFFFFFE) == 0);
\r
67 SANITY_CHECK((tdesmod & 0xFFFFFFFD) == 0);
\r
68 SANITY_CHECK((keymod & 0xFFFFFFEF) == 0);
\r
69 SANITY_CHECK((smod & 0xFFFFFCFF) == 0);
\r
70 SANITY_CHECK((opmod & 0xFFFFCFFF) == 0);
\r
73 AT91C_BASE_TDES->TDES_CR = AT91C_TDES_SWRST;
\r
75 // Configure mode register
\r
76 AT91C_BASE_TDES->TDES_MR = cipher | tdesmod | keymod | smod | opmod;
\r
79 //------------------------------------------------------------------------------
\r
80 /// Starts the encryption or decryption process if the TDES peripheral is
\r
81 /// configured in manual or PDC mode.
\r
82 //------------------------------------------------------------------------------
\r
83 void TDES_Start(void)
\r
85 trace_LOG(trace_DEBUG, "-D- TDES_Start()\n\r");
\r
86 SANITY_CHECK(((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_SMOD) == AT91C_TDES_SMOD_MANUAL)
\r
87 || ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_SMOD) == AT91C_TDES_SMOD_PDC));
\r
90 if ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_SMOD) == AT91C_TDES_SMOD_MANUAL) {
\r
92 AT91C_BASE_TDES->TDES_CR = AT91C_TDES_START;
\r
97 AT91C_BASE_TDES->TDES_PTCR = AT91C_PDC_RXTEN | AT91C_PDC_TXTEN;
\r
101 //------------------------------------------------------------------------------
\r
102 /// Returns the current status register value of the TDES peripheral.
\r
103 //------------------------------------------------------------------------------
\r
104 unsigned int TDES_GetStatus(void)
\r
106 trace_LOG(trace_DEBUG, "-D- TDES_GetStatus()\n\r");
\r
108 return AT91C_BASE_TDES->TDES_ISR;
\r
111 //------------------------------------------------------------------------------
\r
112 /// Sets the 64-bits keys (one, two or three depending on the configuration)
\r
113 /// that shall be used by the TDES algorithm.
\r
114 /// \param pKey1 Pointer to key #1.
\r
115 /// \param pKey2 Pointer to key #2 (shall be 0 in single-DES mode).
\r
116 /// \param pKey3 Pointer to key #3 (shall be 0 when using two keys).
\r
117 //------------------------------------------------------------------------------
\r
119 const unsigned int *pKey1,
\r
120 const unsigned int *pKey2,
\r
121 const unsigned int *pKey3)
\r
123 trace_LOG(trace_DEBUG, "-D- TDES_SetKeys()\n\r");
\r
124 SANITY_CHECK(pKey1);
\r
125 SANITY_CHECK((pKey2 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == AT91C_TDES_TDESMOD))
\r
126 || (!pKey2 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == 0)));
\r
127 SANITY_CHECK((pKey3
\r
128 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == AT91C_TDES_TDESMOD)
\r
129 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_KEYMOD) == 0))
\r
132 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == AT91C_TDES_TDESMOD)
\r
133 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_KEYMOD) == AT91C_TDES_KEYMOD))
\r
136 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_TDESMOD) == 0)
\r
137 && ((AT91C_BASE_TDES->TDES_MR & AT91C_TDES_KEYMOD) == 0)));
\r
142 AT91C_BASE_TDES->TDES_KEY1WxR[0] = pKey1[0];
\r
143 AT91C_BASE_TDES->TDES_KEY1WxR[1] = pKey1[1];
\r
149 AT91C_BASE_TDES->TDES_KEY2WxR[0] = pKey2[0];
\r
150 AT91C_BASE_TDES->TDES_KEY2WxR[1] = pKey2[1];
\r
156 AT91C_BASE_TDES->TDES_KEY3WxR[0] = pKey3[0];
\r
157 AT91C_BASE_TDES->TDES_KEY3WxR[1] = pKey3[1];
\r
161 //------------------------------------------------------------------------------
\r
162 /// Sets the input data to encrypt/decrypt using TDES.
\r
163 /// \param pInput Pointer to the 64-bits input data.
\r
164 //------------------------------------------------------------------------------
\r
165 void TDES_SetInputData(const unsigned int *pInput)
\r
167 trace_LOG(trace_DEBUG, "-D- TDES_SetInputData()\n\r");
\r
168 SANITY_CHECK(pInput);
\r
170 AT91C_BASE_TDES->TDES_IDATAxR[0] = pInput[0];
\r
171 AT91C_BASE_TDES->TDES_IDATAxR[1] = pInput[1];
\r
174 //------------------------------------------------------------------------------
\r
175 /// Sets the input data buffer to encrypt/decrypt when in PDC mode.
\r
176 /// \param pInput Pointer to the input data.
\r
177 /// \param size Size of buffer in bytes.
\r
178 //------------------------------------------------------------------------------
\r
179 void TDES_SetInputBuffer(const unsigned int *pInput, unsigned int size)
\r
181 trace_LOG(trace_DEBUG, "-D- TDES_SetInputBuffer()\n\r");
\r
182 SANITY_CHECK(pInput);
\r
183 SANITY_CHECK((size > 0) && ((size % 8) == 0));
\r
185 AT91C_BASE_TDES->TDES_TPR = (unsigned int) pInput;
\r
186 AT91C_BASE_TDES->TDES_TCR = size / 4;
\r
189 //------------------------------------------------------------------------------
\r
190 /// Stores the output data from the last TDES operation into the given 64-bits
\r
192 /// \param pOutput Pointer to a 64-bits output buffer.
\r
193 //------------------------------------------------------------------------------
\r
194 void TDES_GetOutputData(unsigned int *pOutput)
\r
196 trace_LOG(trace_DEBUG, "-D- TDES_GetOutputData()\n\r");
\r
197 SANITY_CHECK(pOutput);
\r
199 pOutput[0] = AT91C_BASE_TDES->TDES_ODATAxR[0];
\r
200 pOutput[1] = AT91C_BASE_TDES->TDES_ODATAxR[1];
\r
203 //------------------------------------------------------------------------------
\r
204 /// Sets the output buffer which will receive the encrypted/decrypted data when
\r
206 /// \param pOutput Pointer to the output data.
\r
207 /// \param size Size of buffer in bytes.
\r
208 //------------------------------------------------------------------------------
\r
209 void TDES_SetOutputBuffer(unsigned int *pOutput, unsigned int size)
\r
211 trace_LOG(trace_DEBUG, "-D- TDES_SetOutputBuffer()\n\r");
\r
212 SANITY_CHECK(pOutput);
\r
213 SANITY_CHECK((size > 0) && ((size % 8) == 0));
\r
215 AT91C_BASE_TDES->TDES_RPR = (unsigned int) pOutput;
\r
216 AT91C_BASE_TDES->TDES_RCR = size / 4;
\r
219 //------------------------------------------------------------------------------
\r
220 /// Sets the initialization vector to use when the TDES algorithm is configured
\r
221 /// in a chained block mode (CBC, CFB or OFB).
\r
222 /// \param pVector Pointer to the 64-bits vector.
\r
223 //------------------------------------------------------------------------------
\r
224 void TDES_SetVector(const unsigned int *pVector)
\r
226 trace_LOG(trace_DEBUG, "-D- TDES_SetVector()\n\r");
\r
227 SANITY_CHECK(pVector);
\r
229 AT91C_BASE_TDES->TDES_IVxR[0] = pVector[0];
\r
230 AT91C_BASE_TDES->TDES_IVxR[1] = pVector[1];
\r