diff options
Diffstat (limited to 'lib/mpi/mpicoder.c')
-rw-r--r-- | lib/mpi/mpicoder.c | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c index f26b41fcb48c..f0fa65995800 100644 --- a/lib/mpi/mpicoder.c +++ b/lib/mpi/mpicoder.c | |||
@@ -74,81 +74,6 @@ leave: | |||
74 | EXPORT_SYMBOL_GPL(mpi_read_from_buffer); | 74 | EXPORT_SYMBOL_GPL(mpi_read_from_buffer); |
75 | 75 | ||
76 | /**************** | 76 | /**************** |
77 | * Make an mpi from a character string. | ||
78 | */ | ||
79 | int mpi_fromstr(MPI val, const char *str) | ||
80 | { | ||
81 | int hexmode = 0, sign = 0, prepend_zero = 0, i, j, c, c1, c2; | ||
82 | unsigned nbits, nbytes, nlimbs; | ||
83 | mpi_limb_t a; | ||
84 | |||
85 | if (*str == '-') { | ||
86 | sign = 1; | ||
87 | str++; | ||
88 | } | ||
89 | if (*str == '0' && str[1] == 'x') | ||
90 | hexmode = 1; | ||
91 | else | ||
92 | return -EINVAL; /* other bases are not yet supported */ | ||
93 | str += 2; | ||
94 | |||
95 | nbits = strlen(str) * 4; | ||
96 | if (nbits % 8) | ||
97 | prepend_zero = 1; | ||
98 | nbytes = (nbits + 7) / 8; | ||
99 | nlimbs = (nbytes + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB; | ||
100 | if (val->alloced < nlimbs) | ||
101 | if (!mpi_resize(val, nlimbs)) | ||
102 | return -ENOMEM; | ||
103 | i = BYTES_PER_MPI_LIMB - nbytes % BYTES_PER_MPI_LIMB; | ||
104 | i %= BYTES_PER_MPI_LIMB; | ||
105 | j = val->nlimbs = nlimbs; | ||
106 | val->sign = sign; | ||
107 | for (; j > 0; j--) { | ||
108 | a = 0; | ||
109 | for (; i < BYTES_PER_MPI_LIMB; i++) { | ||
110 | if (prepend_zero) { | ||
111 | c1 = '0'; | ||
112 | prepend_zero = 0; | ||
113 | } else | ||
114 | c1 = *str++; | ||
115 | assert(c1); | ||
116 | c2 = *str++; | ||
117 | assert(c2); | ||
118 | if (c1 >= '0' && c1 <= '9') | ||
119 | c = c1 - '0'; | ||
120 | else if (c1 >= 'a' && c1 <= 'f') | ||
121 | c = c1 - 'a' + 10; | ||
122 | else if (c1 >= 'A' && c1 <= 'F') | ||
123 | c = c1 - 'A' + 10; | ||
124 | else { | ||
125 | mpi_clear(val); | ||
126 | return 1; | ||
127 | } | ||
128 | c <<= 4; | ||
129 | if (c2 >= '0' && c2 <= '9') | ||
130 | c |= c2 - '0'; | ||
131 | else if (c2 >= 'a' && c2 <= 'f') | ||
132 | c |= c2 - 'a' + 10; | ||
133 | else if (c2 >= 'A' && c2 <= 'F') | ||
134 | c |= c2 - 'A' + 10; | ||
135 | else { | ||
136 | mpi_clear(val); | ||
137 | return 1; | ||
138 | } | ||
139 | a <<= 8; | ||
140 | a |= c; | ||
141 | } | ||
142 | i = 0; | ||
143 | |||
144 | val->d[j - 1] = a; | ||
145 | } | ||
146 | |||
147 | return 0; | ||
148 | } | ||
149 | EXPORT_SYMBOL_GPL(mpi_fromstr); | ||
150 | |||
151 | /**************** | ||
152 | * Return an allocated buffer with the MPI (msb first). | 77 | * Return an allocated buffer with the MPI (msb first). |
153 | * NBYTES receives the length of this buffer. Caller must free the | 78 | * NBYTES receives the length of this buffer. Caller must free the |
154 | * return string (This function does return a 0 byte buffer with NBYTES | 79 | * return string (This function does return a 0 byte buffer with NBYTES |