diff options
Diffstat (limited to 'openssl/crypto/bn/bn_mpi.c')
| -rw-r--r-- | openssl/crypto/bn/bn_mpi.c | 130 |
1 files changed, 64 insertions, 66 deletions
diff --git a/openssl/crypto/bn/bn_mpi.c b/openssl/crypto/bn/bn_mpi.c index a054d21ae..3bd40bbd2 100644 --- a/openssl/crypto/bn/bn_mpi.c +++ b/openssl/crypto/bn/bn_mpi.c @@ -5,21 +5,21 @@ * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. - * + * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * + * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. - * + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -34,10 +34,10 @@ * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from + * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * + * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE @@ -49,7 +49,7 @@ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. - * + * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence @@ -61,70 +61,68 @@ #include "bn_lcl.h" int BN_bn2mpi(const BIGNUM *a, unsigned char *d) - { - int bits; - int num=0; - int ext=0; - long l; +{ + int bits; + int num = 0; + int ext = 0; + long l; - bits=BN_num_bits(a); - num=(bits+7)/8; - if (bits > 0) - { - ext=((bits & 0x07) == 0); - } - if (d == NULL) - return(num+4+ext); + bits = BN_num_bits(a); + num = (bits + 7) / 8; + if (bits > 0) { + ext = ((bits & 0x07) == 0); + } + if (d == NULL) + return (num + 4 + ext); - l=num+ext; - d[0]=(unsigned char)(l>>24)&0xff; - d[1]=(unsigned char)(l>>16)&0xff; - d[2]=(unsigned char)(l>> 8)&0xff; - d[3]=(unsigned char)(l )&0xff; - if (ext) d[4]=0; - num=BN_bn2bin(a,&(d[4+ext])); - if (a->neg) - d[4]|=0x80; - return(num+4+ext); - } + l = num + ext; + d[0] = (unsigned char)(l >> 24) & 0xff; + d[1] = (unsigned char)(l >> 16) & 0xff; + d[2] = (unsigned char)(l >> 8) & 0xff; + d[3] = (unsigned char)(l) & 0xff; + if (ext) + d[4] = 0; + num = BN_bn2bin(a, &(d[4 + ext])); + if (a->neg) + d[4] |= 0x80; + return (num + 4 + ext); +} BIGNUM *BN_mpi2bn(const unsigned char *d, int n, BIGNUM *a) - { - long len; - int neg=0; - - if (n < 4) - { - BNerr(BN_F_BN_MPI2BN,BN_R_INVALID_LENGTH); - return(NULL); - } - len=((long)d[0]<<24)|((long)d[1]<<16)|((int)d[2]<<8)|(int)d[3]; - if ((len+4) != n) - { - BNerr(BN_F_BN_MPI2BN,BN_R_ENCODING_ERROR); - return(NULL); - } +{ + long len; + int neg = 0; - if (a == NULL) a=BN_new(); - if (a == NULL) return(NULL); + if (n < 4) { + BNerr(BN_F_BN_MPI2BN, BN_R_INVALID_LENGTH); + return (NULL); + } + len = ((long)d[0] << 24) | ((long)d[1] << 16) | ((int)d[2] << 8) | (int) + d[3]; + if ((len + 4) != n) { + BNerr(BN_F_BN_MPI2BN, BN_R_ENCODING_ERROR); + return (NULL); + } - if (len == 0) - { - a->neg=0; - a->top=0; - return(a); - } - d+=4; - if ((*d) & 0x80) - neg=1; - if (BN_bin2bn(d,(int)len,a) == NULL) - return(NULL); - a->neg=neg; - if (neg) - { - BN_clear_bit(a,BN_num_bits(a)-1); - } - bn_check_top(a); - return(a); - } + if (a == NULL) + a = BN_new(); + if (a == NULL) + return (NULL); + if (len == 0) { + a->neg = 0; + a->top = 0; + return (a); + } + d += 4; + if ((*d) & 0x80) + neg = 1; + if (BN_bin2bn(d, (int)len, a) == NULL) + return (NULL); + a->neg = neg; + if (neg) { + BN_clear_bit(a, BN_num_bits(a) - 1); + } + bn_check_top(a); + return (a); +} |