diff options
Diffstat (limited to 'libbb/md5.c')
| -rw-r--r-- | libbb/md5.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/libbb/md5.c b/libbb/md5.c index eb15d758d..768dfbcb7 100644 --- a/libbb/md5.c +++ b/libbb/md5.c @@ -416,15 +416,14 @@ void FAST_FUNC md5_end(void *resbuf, md5_ctx_t *ctx) md5_hash_block(ctx->buffer, ctx); md5_hash_block(buf, ctx); - /* Put result from CTX in first 16 bytes following RESBUF. The result is - * always in little endian byte order, so that a byte-wise output yields - * to the wanted ASCII representation of the message digest. - * - * IMPORTANT: On some systems it is required that RESBUF is correctly - * aligned for a 32 bits value. + /* The MD5 result is in little endian byte order. + * We (ab)use the fact that A-D are consecutive in memory. */ - ((uint32_t *) resbuf)[0] = SWAP_LE32(ctx->A); - ((uint32_t *) resbuf)[1] = SWAP_LE32(ctx->B); - ((uint32_t *) resbuf)[2] = SWAP_LE32(ctx->C); - ((uint32_t *) resbuf)[3] = SWAP_LE32(ctx->D); +#if BB_BIG_ENDIAN + ctx->A = SWAP_LE32(ctx->A); + ctx->B = SWAP_LE32(ctx->B); + ctx->C = SWAP_LE32(ctx->C); + ctx->D = SWAP_LE32(ctx->D); +#endif + memcpy(resbuf, &ctx->A, sizeof(ctx->A) * 4); } |