1 | ;;;; message-digest-srfi-4.scm |
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2 | ;;;; Kon Lovett, Jan '06 (message-digest.scm) |
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3 | ;;;; Kon Lovett, May '10 (message-digest.scm) |
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4 | ;;;; Kon Lovett, Apr '12 |
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5 | ;;;; Kon Lovett, Aug '17 |
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6 | |
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7 | ;; Issues |
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8 | ;; |
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9 | ;; - Passes u8vector to update phase as a blob. |
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10 | |
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11 | (module message-digest-srfi-4 |
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12 | |
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13 | (;export |
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14 | message-digest-update-u8vector |
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15 | message-digest-update-packed-vector |
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16 | message-digest-u8vector message-digest-u8vector! |
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17 | ;DEPRECATED |
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18 | message-digest-update-bytevector |
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19 | message-digest-update-subu8vector |
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20 | ) |
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21 | |
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22 | (import scheme chicken) |
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23 | |
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24 | (use |
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25 | data-structures |
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26 | srfi-4 |
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27 | (only lolevel number-of-bytes) |
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28 | (only srfi-4-checks check-u8vector) |
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29 | (only type-errors error-argument-type) |
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30 | message-digest-primitive |
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31 | message-digest-type |
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32 | message-digest-support |
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33 | message-digest-bv) |
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34 | |
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35 | ;;; Support |
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36 | |
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37 | ;; |
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38 | |
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39 | (define (get-bytevector-object loc obj) |
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40 | (cond |
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41 | ((string? obj) |
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42 | (string->blob obj) ) |
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43 | ((blob? obj) |
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44 | obj ) |
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45 | ((packed-vector->blob/shared obj) |
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46 | ) |
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47 | (else |
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48 | (error-argument-type loc obj "string, blob, or SRFI 4 vector" obj) ) ) ) |
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49 | |
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50 | ;;; Update API |
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51 | |
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52 | ;; |
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53 | |
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54 | (define (message-digest-update-u8vector md u8vec |
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55 | #!optional |
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56 | (start 0) (end (u8vector-length u8vec))) |
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57 | (message-digest-update-blob md |
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58 | (u8vector->blob/shared (u8vector/slice u8vec start end))) ) |
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59 | |
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60 | ;;; Single Source API |
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61 | |
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62 | (define (message-digest-u8vector mdp u8vec |
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63 | #!optional |
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64 | (result-type (message-digest-result-form)) |
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65 | (start 0) (end (u8vector-length u8vec))) |
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66 | (let ((md (initialize-message-digest mdp))) |
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67 | (message-digest-update-u8vector md u8vec start end) |
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68 | (finalize-message-digest md result-type) ) ) |
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69 | |
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70 | (define (message-digest-u8vector! mdp u8vec buffer |
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71 | #!optional |
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72 | (start 0) (end (u8vector-length u8vec))) |
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73 | (let ((md (initialize-message-digest mdp))) |
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74 | (message-digest-update-u8vector md u8vec start end) |
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75 | (finalize-message-digest! md buffer) ) ) |
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76 | |
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77 | ;;; |
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78 | |
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79 | ;; |
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80 | |
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81 | ;DEPRECATED |
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82 | (define (message-digest-update-subu8vector md u8vec start end) |
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83 | (message-digest-update-blob md (u8vector->blob/shared (subu8vector u8vec start end))) ) |
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84 | |
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85 | ;; |
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86 | |
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87 | ;DEPRECATED |
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88 | (define (message-digest-update-packed-vector md pkdvec) |
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89 | (let ((blb (packed-vector->blob/shared pkdvec))) |
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90 | (if blb |
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91 | (message-digest-update-blob md blb) |
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92 | (error-argument-type 'message-digest-update-packed-vector pkdvec "SRFI 4 vector") ) ) ) |
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93 | |
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94 | ;; |
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95 | |
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96 | ;DEPRECATED |
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97 | (define (message-digest-update-bytevector md bv #!optional (len (number-of-bytes bv))) |
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98 | (check-message-digest 'message-digest-update-bytevector md) |
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99 | (let ((mdp (message-digest-algorithm md)) |
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100 | (ctx (message-digest-context md)) ) |
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101 | ((message-digest-primitive-update mdp) |
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102 | ctx |
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103 | (get-bytevector-object 'message-digest-update-bytevector bv) |
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104 | len) ) ) |
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105 | |
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106 | ) ;module message-digest-srfi-4 |
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