| File: | out/../deps/openssl/openssl/crypto/bn/bn_conv.c |
| Warning: | line 169, column 5 Value stored to 'm' is never read |
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| 1 | /* |
| 2 | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
| 5 | * this file except in compliance with the License. You can obtain a copy |
| 6 | * in the file LICENSE in the source distribution or at |
| 7 | * https://www.openssl.org/source/license.html |
| 8 | */ |
| 9 | |
| 10 | #include <openssl/err.h> |
| 11 | #include "crypto/ctype.h" |
| 12 | #include "bn_local.h" |
| 13 | |
| 14 | static const char Hex[] = "0123456789ABCDEF"; |
| 15 | |
| 16 | /* Must 'OPENSSL_free' the returned data */ |
| 17 | char *BN_bn2hex(const BIGNUM *a) |
| 18 | { |
| 19 | int i, j, v, z = 0; |
| 20 | char *buf; |
| 21 | char *p; |
| 22 | |
| 23 | if (BN_is_zero(a)) |
| 24 | return OPENSSL_strdup("0")CRYPTO_strdup("0", "../deps/openssl/openssl/crypto/bn/bn_conv.c" , 24); |
| 25 | buf = OPENSSL_malloc(a->top * BN_BYTES * 2 + 2)CRYPTO_malloc(a->top * 8 * 2 + 2, "../deps/openssl/openssl/crypto/bn/bn_conv.c" , 25); |
| 26 | if (buf == NULL((void*)0)) { |
| 27 | ERR_raise(ERR_LIB_BN, ERR_R_MALLOC_FAILURE)(ERR_new(), ERR_set_debug("../deps/openssl/openssl/crypto/bn/bn_conv.c" ,27,__func__), ERR_set_error)((3),((256|((0x1 << 18L)|( 0x2 << 18L)))),((void*)0)); |
| 28 | goto err; |
| 29 | } |
| 30 | p = buf; |
| 31 | if (a->neg) |
| 32 | *p++ = '-'; |
| 33 | for (i = a->top - 1; i >= 0; i--) { |
| 34 | for (j = BN_BITS2(8 * 8) - 8; j >= 0; j -= 8) { |
| 35 | /* strip leading zeros */ |
| 36 | v = (int)((a->d[i] >> j) & 0xff); |
| 37 | if (z || v != 0) { |
| 38 | *p++ = Hex[v >> 4]; |
| 39 | *p++ = Hex[v & 0x0f]; |
| 40 | z = 1; |
| 41 | } |
| 42 | } |
| 43 | } |
| 44 | *p = '\0'; |
| 45 | err: |
| 46 | return buf; |
| 47 | } |
| 48 | |
| 49 | #ifndef FIPS_MODULE |
| 50 | /* No BIO_snprintf in FIPS_MODULE */ |
| 51 | /* Must 'OPENSSL_free' the returned data */ |
| 52 | char *BN_bn2dec(const BIGNUM *a) |
| 53 | { |
| 54 | int i = 0, num, ok = 0, n, tbytes; |
| 55 | char *buf = NULL((void*)0); |
| 56 | char *p; |
| 57 | BIGNUM *t = NULL((void*)0); |
| 58 | BN_ULONGunsigned long *bn_data = NULL((void*)0), *lp; |
| 59 | int bn_data_num; |
| 60 | |
| 61 | /*- |
| 62 | * get an upper bound for the length of the decimal integer |
| 63 | * num <= (BN_num_bits(a) + 1) * log(2) |
| 64 | * <= 3 * BN_num_bits(a) * 0.101 + log(2) + 1 (rounding error) |
| 65 | * <= 3 * BN_num_bits(a) / 10 + 3 * BN_num_bits / 1000 + 1 + 1 |
| 66 | */ |
| 67 | i = BN_num_bits(a) * 3; |
| 68 | num = (i / 10 + i / 1000 + 1) + 1; |
| 69 | tbytes = num + 3; /* negative and terminator and one spare? */ |
| 70 | bn_data_num = num / BN_DEC_NUM19 + 1; |
| 71 | bn_data = OPENSSL_malloc(bn_data_num * sizeof(BN_ULONG))CRYPTO_malloc(bn_data_num * sizeof(unsigned long), "../deps/openssl/openssl/crypto/bn/bn_conv.c" , 71); |
| 72 | buf = OPENSSL_malloc(tbytes)CRYPTO_malloc(tbytes, "../deps/openssl/openssl/crypto/bn/bn_conv.c" , 72); |
| 73 | if (buf == NULL((void*)0) || bn_data == NULL((void*)0)) { |
| 74 | ERR_raise(ERR_LIB_BN, ERR_R_MALLOC_FAILURE)(ERR_new(), ERR_set_debug("../deps/openssl/openssl/crypto/bn/bn_conv.c" ,74,__func__), ERR_set_error)((3),((256|((0x1 << 18L)|( 0x2 << 18L)))),((void*)0)); |
| 75 | goto err; |
| 76 | } |
| 77 | if ((t = BN_dup(a)) == NULL((void*)0)) |
| 78 | goto err; |
| 79 | |
| 80 | p = buf; |
| 81 | lp = bn_data; |
| 82 | if (BN_is_zero(t)) { |
| 83 | *p++ = '0'; |
| 84 | *p++ = '\0'; |
| 85 | } else { |
| 86 | if (BN_is_negative(t)) |
| 87 | *p++ = '-'; |
| 88 | |
| 89 | while (!BN_is_zero(t)) { |
| 90 | if (lp - bn_data >= bn_data_num) |
| 91 | goto err; |
| 92 | *lp = BN_div_word(t, BN_DEC_CONV(10000000000000000000UL)); |
| 93 | if (*lp == (BN_ULONGunsigned long)-1) |
| 94 | goto err; |
| 95 | lp++; |
| 96 | } |
| 97 | lp--; |
| 98 | /* |
| 99 | * We now have a series of blocks, BN_DEC_NUM chars in length, where |
| 100 | * the last one needs truncation. The blocks need to be reversed in |
| 101 | * order. |
| 102 | */ |
| 103 | n = BIO_snprintf(p, tbytes - (size_t)(p - buf), BN_DEC_FMT1"%lu", *lp); |
| 104 | if (n < 0) |
| 105 | goto err; |
| 106 | p += n; |
| 107 | while (lp != bn_data) { |
| 108 | lp--; |
| 109 | n = BIO_snprintf(p, tbytes - (size_t)(p - buf), BN_DEC_FMT2"%019lu", *lp); |
| 110 | if (n < 0) |
| 111 | goto err; |
| 112 | p += n; |
| 113 | } |
| 114 | } |
| 115 | ok = 1; |
| 116 | err: |
| 117 | OPENSSL_free(bn_data)CRYPTO_free(bn_data, "../deps/openssl/openssl/crypto/bn/bn_conv.c" , 117); |
| 118 | BN_free(t); |
| 119 | if (ok) |
| 120 | return buf; |
| 121 | OPENSSL_free(buf)CRYPTO_free(buf, "../deps/openssl/openssl/crypto/bn/bn_conv.c" , 121); |
| 122 | return NULL((void*)0); |
| 123 | } |
| 124 | #endif |
| 125 | |
| 126 | int BN_hex2bn(BIGNUM **bn, const char *a) |
| 127 | { |
| 128 | BIGNUM *ret = NULL((void*)0); |
| 129 | BN_ULONGunsigned long l = 0; |
| 130 | int neg = 0, h, m, i, j, k, c; |
| 131 | int num; |
| 132 | |
| 133 | if (a == NULL((void*)0) || *a == '\0') |
| 134 | return 0; |
| 135 | |
| 136 | if (*a == '-') { |
| 137 | neg = 1; |
| 138 | a++; |
| 139 | } |
| 140 | |
| 141 | for (i = 0; i <= INT_MAX2147483647 / 4 && ossl_isxdigit(a[i])(ossl_ctype_check((a[i]), 0x10)); i++) |
| 142 | continue; |
| 143 | |
| 144 | if (i == 0 || i > INT_MAX2147483647 / 4) |
| 145 | return 0; |
| 146 | |
| 147 | num = i + neg; |
| 148 | if (bn == NULL((void*)0)) |
| 149 | return num; |
| 150 | |
| 151 | /* a is the start of the hex digits, and it is 'i' long */ |
| 152 | if (*bn == NULL((void*)0)) { |
| 153 | if ((ret = BN_new()) == NULL((void*)0)) |
| 154 | return 0; |
| 155 | } else { |
| 156 | ret = *bn; |
| 157 | if (BN_get_flags(ret, BN_FLG_STATIC_DATA0x02)) { |
| 158 | ERR_raise(ERR_LIB_BN, ERR_R_PASSED_INVALID_ARGUMENT)(ERR_new(), ERR_set_debug("../deps/openssl/openssl/crypto/bn/bn_conv.c" ,158,__func__), ERR_set_error)((3),((262|(0x2 << 18L))) ,((void*)0)); |
| 159 | return 0; |
| 160 | } |
| 161 | BN_zero(ret)BN_zero_ex(ret); |
| 162 | } |
| 163 | |
| 164 | /* i is the number of hex digits */ |
| 165 | if (bn_expand(ret, i * 4) == NULL((void*)0)) |
| 166 | goto err; |
| 167 | |
| 168 | j = i; /* least significant 'hex' */ |
| 169 | m = 0; |
Value stored to 'm' is never read | |
| 170 | h = 0; |
| 171 | while (j > 0) { |
| 172 | m = (BN_BYTES8 * 2 <= j) ? BN_BYTES8 * 2 : j; |
| 173 | l = 0; |
| 174 | for (;;) { |
| 175 | c = a[j - m]; |
| 176 | k = OPENSSL_hexchar2int(c); |
| 177 | if (k < 0) |
| 178 | k = 0; /* paranoia */ |
| 179 | l = (l << 4) | k; |
| 180 | |
| 181 | if (--m <= 0) { |
| 182 | ret->d[h++] = l; |
| 183 | break; |
| 184 | } |
| 185 | } |
| 186 | j -= BN_BYTES8 * 2; |
| 187 | } |
| 188 | ret->top = h; |
| 189 | bn_correct_top(ret); |
| 190 | |
| 191 | *bn = ret; |
| 192 | bn_check_top(ret); |
| 193 | /* Don't set the negative flag if it's zero. */ |
| 194 | if (ret->top != 0) |
| 195 | ret->neg = neg; |
| 196 | return num; |
| 197 | err: |
| 198 | if (*bn == NULL((void*)0)) |
| 199 | BN_free(ret); |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | int BN_dec2bn(BIGNUM **bn, const char *a) |
| 204 | { |
| 205 | BIGNUM *ret = NULL((void*)0); |
| 206 | BN_ULONGunsigned long l = 0; |
| 207 | int neg = 0, i, j; |
| 208 | int num; |
| 209 | |
| 210 | if (a == NULL((void*)0) || *a == '\0') |
| 211 | return 0; |
| 212 | if (*a == '-') { |
| 213 | neg = 1; |
| 214 | a++; |
| 215 | } |
| 216 | |
| 217 | for (i = 0; i <= INT_MAX2147483647 / 4 && ossl_isdigit(a[i]); i++) |
| 218 | continue; |
| 219 | |
| 220 | if (i == 0 || i > INT_MAX2147483647 / 4) |
| 221 | goto err; |
| 222 | |
| 223 | num = i + neg; |
| 224 | if (bn == NULL((void*)0)) |
| 225 | return num; |
| 226 | |
| 227 | /* |
| 228 | * a is the start of the digits, and it is 'i' long. We chop it into |
| 229 | * BN_DEC_NUM digits at a time |
| 230 | */ |
| 231 | if (*bn == NULL((void*)0)) { |
| 232 | if ((ret = BN_new()) == NULL((void*)0)) |
| 233 | return 0; |
| 234 | } else { |
| 235 | ret = *bn; |
| 236 | BN_zero(ret)BN_zero_ex(ret); |
| 237 | } |
| 238 | |
| 239 | /* i is the number of digits, a bit of an over expand */ |
| 240 | if (bn_expand(ret, i * 4) == NULL((void*)0)) |
| 241 | goto err; |
| 242 | |
| 243 | j = BN_DEC_NUM19 - i % BN_DEC_NUM19; |
| 244 | if (j == BN_DEC_NUM19) |
| 245 | j = 0; |
| 246 | l = 0; |
| 247 | while (--i >= 0) { |
| 248 | l *= 10; |
| 249 | l += *a - '0'; |
| 250 | a++; |
| 251 | if (++j == BN_DEC_NUM19) { |
| 252 | if (!BN_mul_word(ret, BN_DEC_CONV(10000000000000000000UL)) |
| 253 | || !BN_add_word(ret, l)) |
| 254 | goto err; |
| 255 | l = 0; |
| 256 | j = 0; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | bn_correct_top(ret); |
| 261 | *bn = ret; |
| 262 | bn_check_top(ret); |
| 263 | /* Don't set the negative flag if it's zero. */ |
| 264 | if (ret->top != 0) |
| 265 | ret->neg = neg; |
| 266 | return num; |
| 267 | err: |
| 268 | if (*bn == NULL((void*)0)) |
| 269 | BN_free(ret); |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | int BN_asc2bn(BIGNUM **bn, const char *a) |
| 274 | { |
| 275 | const char *p = a; |
| 276 | |
| 277 | if (*p == '-') |
| 278 | p++; |
| 279 | |
| 280 | if (p[0] == '0' && (p[1] == 'X' || p[1] == 'x')) { |
| 281 | if (!BN_hex2bn(bn, p + 2)) |
| 282 | return 0; |
| 283 | } else { |
| 284 | if (!BN_dec2bn(bn, p)) |
| 285 | return 0; |
| 286 | } |
| 287 | /* Don't set the negative flag if it's zero. */ |
| 288 | if (*a == '-' && (*bn)->top != 0) |
| 289 | (*bn)->neg = 1; |
| 290 | return 1; |
| 291 | } |